yaml 0.7.0.2 → 0.7.0.3
raw patch · 20 files changed
+14177/−14157 lines, 20 filessetup-changed
Files
- Data/Yaml.hs +275/−269
- LICENSE +25/−25
- Setup.lhs +7/−7
- Text/Libyaml.hs +595/−595
- c/helper.c +142/−142
- c/helper.h +40/−40
- libyaml/LICENSE +19/−19
- libyaml/api.c +1390/−1390
- libyaml/dumper.c +394/−394
- libyaml/emitter.c +2297/−2297
- libyaml/loader.c +430/−430
- libyaml/parser.c +1374/−1374
- libyaml/reader.c +460/−460
- libyaml/scanner.c +3568/−3568
- libyaml/writer.c +141/−141
- libyaml/yaml.h +1973/−1973
- libyaml/yaml_private.h +639/−639
- test/largest-string.yaml +6/−6
- test/main.hs +324/−310
- yaml.cabal +78/−78
Data/Yaml.hs view
@@ -1,269 +1,275 @@-{-# LANGUAGE FlexibleContexts #-} -{-# LANGUAGE FlexibleInstances #-} -{-# LANGUAGE CPP #-} -{-# LANGUAGE DeriveDataTypeable #-} -{-# LANGUAGE MultiParamTypeClasses #-} -{-# LANGUAGE PatternGuards #-} -{-# LANGUAGE ScopedTypeVariables #-} -{-# LANGUAGE OverloadedStrings #-} -module Data.Yaml - ( -- * Types - Value (..) - , Parser - , Object - , Array - -- * Constructors and accessors - , object - , array - , (.=) - , (.:) - , (.:?) - , (.!=) - -- * Parsing - , parseMonad - , parseEither - , parseMaybe - -- * Classes - , ToJSON (..) - , FromJSON (..) - -- * Encoding/decoding - , encode - , encodeFile - , decode - , decodeFile - -- ** Better error information - , decodeEither - ) where - -import qualified Text.Libyaml as Y -import Data.Aeson - ( Value (..), ToJSON (..), FromJSON (..), object - , (.=) , (.:) , (.:?) , (.!=) - , Object, Array - ) -import Data.Aeson.Types (Pair, parseMaybe, parseEither, Parser) -import Text.Libyaml hiding (encode, decode, encodeFile, decodeFile) -import Data.ByteString (ByteString) -import qualified Data.ByteString.Char8 as S8 -import qualified Data.Map as Map -import System.IO.Unsafe (unsafePerformIO) -import Control.Exception (try, throwIO, fromException, Exception) -import Control.Monad.Trans.State -import qualified Data.Conduit as C -import qualified Data.Conduit.List as CL -import Control.Monad.Trans.Class (MonadTrans, lift) -import Control.Monad.IO.Class (MonadIO, liftIO) -import Control.Monad (liftM) -import qualified Data.Vector as V -import Data.Text (Text, pack) -import Data.Text.Read (signed, decimal, double) -import Data.Text.Encoding (encodeUtf8, decodeUtf8With) -import Data.Text.Encoding.Error (lenientDecode) -import qualified Data.HashMap.Strict as M -import Data.Typeable -import Data.Attoparsec.Number - -encode :: ToJSON a => a -> ByteString -encode obj = unsafePerformIO $ - C.runResourceT $ CL.sourceList (objToEvents $ toJSON obj) - C.$$ Y.encode - -encodeFile :: ToJSON a => FilePath -> a -> IO () -encodeFile fp obj = C.runResourceT - $ CL.sourceList (objToEvents $ toJSON obj) - C.$$ Y.encodeFile fp - -objToEvents :: Value -> [Y.Event] -objToEvents o = (:) EventStreamStart - . (:) EventDocumentStart - $ objToEvents' o - [ EventDocumentEnd - , EventStreamEnd - ] - -{- FIXME -scalarToEvent :: YamlScalar -> Event -scalarToEvent (YamlScalar v t s) = EventScalar v t s Nothing --} - -objToEvents' :: Value -> [Y.Event] -> [Y.Event] ---objToEvents' (Scalar s) rest = scalarToEvent s : rest -objToEvents' (Array list) rest = - EventSequenceStart Nothing - : foldr ($) (EventSequenceEnd : rest) (map objToEvents' $ V.toList list) -objToEvents' (Object pairs) rest = - EventMappingStart Nothing - : foldr ($) (EventMappingEnd : rest) (map pairToEvents $ M.toList pairs) -objToEvents' (String s) rest = EventScalar (encodeUtf8 s) NoTag Any Nothing : rest -objToEvents' Null rest = EventScalar "null" NoTag Literal Nothing : rest -objToEvents' (Bool True) rest = EventScalar "true" NoTag Literal Nothing : rest -objToEvents' (Bool False) rest = EventScalar "false" NoTag Literal Nothing : rest -objToEvents' (Number n) rest = EventScalar (S8.pack $ show n) NoTag Literal Nothing : rest - -pairToEvents :: Pair -> [Y.Event] -> [Y.Event] -pairToEvents (k, v) rest = - EventScalar (encodeUtf8 k) NoTag Any Nothing - : objToEvents' v rest - --- Parsing - -data ParseException = NonScalarKey - | UnknownAlias { _anchorName :: Y.AnchorName } - | UnexpectedEvent { _received :: Maybe Event - , _expected :: Maybe Event - } - | InvalidYaml (Maybe String) - deriving (Show, Typeable) -instance Exception ParseException - -newtype PErrorT m a = PErrorT { runPErrorT :: m (Either ParseException a) } -instance Monad m => Monad (PErrorT m) where - return = PErrorT . return . Right - (PErrorT m) >>= f = PErrorT $ do - e <- m - case e of - Left e' -> return $ Left e' - Right a -> runPErrorT $ f a -instance MonadTrans PErrorT where - lift = PErrorT . liftM Right -instance MonadIO m => MonadIO (PErrorT m) where - liftIO = lift . liftIO - -type Parse = StateT (Map.Map String Value) (C.ResourceT IO) - -requireEvent :: Event -> C.Sink Event Parse () -requireEvent e = do - f <- CL.head - if f == Just e - then return () - else liftIO $ throwIO $ UnexpectedEvent f $ Just e - -parse :: C.Sink Event Parse Value -parse = do - requireEvent EventStreamStart - requireEvent EventDocumentStart - res <- parseO - requireEvent EventDocumentEnd - requireEvent EventStreamEnd - return res - -parseScalar :: ByteString -> Anchor -> Style - -> C.Sink Event Parse Text -parseScalar v a style = do - let res = decodeUtf8With lenientDecode v - case a of - Nothing -> return res - Just an -> do - lift $ modify (Map.insert an $ textToValue style res) - return res - -textToValue :: Style -> Text -> Value -textToValue SingleQuoted t = String t -textToValue DoubleQuoted t = String t -textToValue Folded t = String t -textToValue _ "true" = Bool True -textToValue _ "false" = Bool False -textToValue _ "null" = Null -textToValue _ t - | Right (x, "") <- signed decimal t = Number $ I x - | Right (x, "") <- double t = Number $ D x - | otherwise = String t - -parseO :: C.Sink Event Parse Value -parseO = do - me <- CL.head - case me of - Just (EventScalar v _t style a) -> fmap (textToValue style) $ parseScalar v a style - Just (EventSequenceStart a) -> parseS a id - Just (EventMappingStart a) -> parseM a M.empty - Just (EventAlias an) -> do - m <- lift get - case Map.lookup an m of - Nothing -> liftIO $ throwIO $ UnknownAlias an - Just v -> return v - _ -> liftIO $ throwIO $ UnexpectedEvent me Nothing - -parseS :: Y.Anchor - -> ([Value] -> [Value]) - -> C.Sink Event Parse Value -parseS a front = do - me <- CL.peek - case me of - Just EventSequenceEnd -> do - CL.drop 1 - let res = Array $ V.fromList $ front [] - case a of - Nothing -> return res - Just an -> do - lift $ modify $ Map.insert an res - return res - _ -> do - o <- parseO - parseS a $ front . (:) o - -parseM :: Y.Anchor - -> M.HashMap Text Value - -> C.Sink Event Parse Value -parseM a front = do - me <- CL.peek - case me of - Just EventMappingEnd -> do - CL.drop 1 - let res = Object front - case a of - Nothing -> return res - Just an -> do - lift $ modify $ Map.insert an res - return res - _ -> do - CL.drop 1 - s <- case me of - Just (EventScalar v _ style a') -> parseScalar v a' style - _ -> liftIO $ throwIO $ UnexpectedEvent me Nothing - o <- parseO - - let al = M.insert s o front - al' = if s == pack "<<" - then case o of - Object l -> M.union al l - Array l -> M.union al $ foldl merge' M.empty $ V.toList l - _ -> al - else al - parseM a $ M.insert s o al' - where merge' al (Object om) = M.union al om - merge' al _ = al - -decode :: FromJSON a - => ByteString - -> Maybe a -decode bs = unsafePerformIO - $ fmap (either (const Nothing) (either (const Nothing) Just)) - $ decodeHelper (Y.decode bs) - -decodeFile :: FromJSON a - => FilePath - -> IO (Maybe a) -decodeFile fp = decodeHelper (Y.decodeFile fp) >>= either throwIO (return . either (const Nothing) id) - -decodeEither :: FromJSON a => ByteString -> Either String a -decodeEither bs = unsafePerformIO - $ fmap (either (Left . show) id) - $ decodeHelper (Y.decode bs) - -decodeHelper :: FromJSON a - => C.Source Parse Y.Event - -> IO (Either ParseException (Either String a)) -decodeHelper src = do - x <- try $ C.runResourceT $ flip evalStateT Map.empty $ src C.$$ parse - case x of - Left e - | Just pe <- fromException e -> return $ Left pe - | Just ye <- fromException e -> return $ Left $ InvalidYaml $ Just $ show (ye :: YamlException) - | otherwise -> throwIO e - Right y -> return $ Right $ parseEither parseJSON y - -array :: [Value] -> Value -array = Array . V.fromList - -parseMonad :: Monad m => (a -> Parser b) -> a -> m b -parseMonad p = either fail return . parseEither p +{-# LANGUAGE FlexibleContexts #-}+{-# LANGUAGE FlexibleInstances #-}+{-# LANGUAGE CPP #-}+{-# LANGUAGE DeriveDataTypeable #-}+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE PatternGuards #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE OverloadedStrings #-}+module Data.Yaml+ ( -- * Types+ Value (..)+ , Parser+ , Object+ , Array+ -- * Constructors and accessors+ , object+ , array+ , (.=)+ , (.:)+ , (.:?)+ , (.!=)+ -- * Parsing+ , parseMonad+ , parseEither+ , parseMaybe+ -- * Classes+ , ToJSON (..)+ , FromJSON (..)+ -- * Encoding/decoding+ , encode+ , encodeFile+ , decode+ , decodeFile+ -- ** Better error information+ , decodeEither+ ) where++import qualified Text.Libyaml as Y+import Data.Aeson+ ( Value (..), ToJSON (..), FromJSON (..), object+ , (.=) , (.:) , (.:?) , (.!=)+ , Object, Array+ )+import Data.Aeson.Types (Pair, parseMaybe, parseEither, Parser)+import Text.Libyaml hiding (encode, decode, encodeFile, decodeFile)+import Data.ByteString (ByteString)+import qualified Data.ByteString.Char8 as S8+import qualified Data.Map as Map+import System.IO.Unsafe (unsafePerformIO)+import Control.Exception (try, throwIO, fromException, Exception)+import Control.Monad.Trans.State+import qualified Data.Conduit as C+import qualified Data.Conduit.List as CL+import Control.Monad.Trans.Class (MonadTrans, lift)+import Control.Monad.IO.Class (MonadIO, liftIO)+import Control.Monad (liftM)+import Data.Char (toUpper)+import qualified Data.Vector as V+import Data.Text (Text, pack)+import qualified Data.Text as T+import Data.Text.Read (signed, decimal, double)+import Data.Text.Encoding (encodeUtf8, decodeUtf8With)+import Data.Text.Encoding.Error (lenientDecode)+import qualified Data.HashMap.Strict as M+import Data.Typeable+import Data.Attoparsec.Number++encode :: ToJSON a => a -> ByteString+encode obj = unsafePerformIO $+ C.runResourceT $ CL.sourceList (objToEvents $ toJSON obj)+ C.$$ Y.encode++encodeFile :: ToJSON a => FilePath -> a -> IO ()+encodeFile fp obj = C.runResourceT+ $ CL.sourceList (objToEvents $ toJSON obj)+ C.$$ Y.encodeFile fp++objToEvents :: Value -> [Y.Event]+objToEvents o = (:) EventStreamStart+ . (:) EventDocumentStart+ $ objToEvents' o+ [ EventDocumentEnd+ , EventStreamEnd+ ]++{- FIXME+scalarToEvent :: YamlScalar -> Event+scalarToEvent (YamlScalar v t s) = EventScalar v t s Nothing+-}++objToEvents' :: Value -> [Y.Event] -> [Y.Event]+--objToEvents' (Scalar s) rest = scalarToEvent s : rest+objToEvents' (Array list) rest =+ EventSequenceStart Nothing+ : foldr ($) (EventSequenceEnd : rest) (map objToEvents' $ V.toList list)+objToEvents' (Object pairs) rest =+ EventMappingStart Nothing+ : foldr ($) (EventMappingEnd : rest) (map pairToEvents $ M.toList pairs)+objToEvents' (String s) rest = EventScalar (encodeUtf8 s) NoTag Any Nothing : rest+objToEvents' Null rest = EventScalar "null" NoTag Literal Nothing : rest+objToEvents' (Bool True) rest = EventScalar "true" NoTag Literal Nothing : rest+objToEvents' (Bool False) rest = EventScalar "false" NoTag Literal Nothing : rest+objToEvents' (Number n) rest = EventScalar (S8.pack $ show n) NoTag Literal Nothing : rest++pairToEvents :: Pair -> [Y.Event] -> [Y.Event]+pairToEvents (k, v) rest =+ EventScalar (encodeUtf8 k) NoTag Any Nothing+ : objToEvents' v rest++-- Parsing++data ParseException = NonScalarKey+ | UnknownAlias { _anchorName :: Y.AnchorName }+ | UnexpectedEvent { _received :: Maybe Event+ , _expected :: Maybe Event+ }+ | InvalidYaml (Maybe String)+ deriving (Show, Typeable)+instance Exception ParseException++newtype PErrorT m a = PErrorT { runPErrorT :: m (Either ParseException a) }+instance Monad m => Monad (PErrorT m) where+ return = PErrorT . return . Right+ (PErrorT m) >>= f = PErrorT $ do+ e <- m+ case e of+ Left e' -> return $ Left e'+ Right a -> runPErrorT $ f a+instance MonadTrans PErrorT where+ lift = PErrorT . liftM Right+instance MonadIO m => MonadIO (PErrorT m) where+ liftIO = lift . liftIO++type Parse = StateT (Map.Map String Value) (C.ResourceT IO)++requireEvent :: Event -> C.Sink Event Parse ()+requireEvent e = do+ f <- CL.head+ if f == Just e+ then return ()+ else liftIO $ throwIO $ UnexpectedEvent f $ Just e++parse :: C.Sink Event Parse Value+parse = do+ requireEvent EventStreamStart+ requireEvent EventDocumentStart+ res <- parseO+ requireEvent EventDocumentEnd+ requireEvent EventStreamEnd+ return res++parseScalar :: ByteString -> Anchor -> Style -> Tag+ -> C.Sink Event Parse Text+parseScalar v a style tag = do+ let res = decodeUtf8With lenientDecode v+ case a of+ Nothing -> return res+ Just an -> do+ lift $ modify (Map.insert an $ textToValue style tag res)+ return res++textToValue :: Style -> Tag -> Text -> Value+textToValue SingleQuoted _ t = String t+textToValue DoubleQuoted _ t = String t+textToValue _ StrTag t = String t+textToValue Folded _ t = String t+textToValue _ _ "null" = Null+textToValue _ _ t+ | any (t `isLike`) ["y", "yes", "on", "true"] = Bool True+ | any (t `isLike`) ["n", "no", "off", "false"] = Bool False+ | Right (x, "") <- signed decimal t = Number $ I x+ | Right (x, "") <- double t = Number $ D x+ | otherwise = String t+ where x `isLike` ref = x `elem` [ref, T.toUpper ref, titleCased]+ where titleCased = toUpper (T.head ref) `T.cons` T.tail ref+++parseO :: C.Sink Event Parse Value+parseO = do+ me <- CL.head+ case me of+ Just (EventScalar v tag style a) -> fmap (textToValue style tag) $ parseScalar v a style tag+ Just (EventSequenceStart a) -> parseS a id+ Just (EventMappingStart a) -> parseM a M.empty+ Just (EventAlias an) -> do+ m <- lift get+ case Map.lookup an m of+ Nothing -> liftIO $ throwIO $ UnknownAlias an+ Just v -> return v+ _ -> liftIO $ throwIO $ UnexpectedEvent me Nothing++parseS :: Y.Anchor+ -> ([Value] -> [Value])+ -> C.Sink Event Parse Value+parseS a front = do+ me <- CL.peek+ case me of+ Just EventSequenceEnd -> do+ CL.drop 1+ let res = Array $ V.fromList $ front []+ case a of+ Nothing -> return res+ Just an -> do+ lift $ modify $ Map.insert an res+ return res+ _ -> do+ o <- parseO+ parseS a $ front . (:) o++parseM :: Y.Anchor+ -> M.HashMap Text Value+ -> C.Sink Event Parse Value+parseM a front = do+ me <- CL.peek+ case me of+ Just EventMappingEnd -> do+ CL.drop 1+ let res = Object front+ case a of+ Nothing -> return res+ Just an -> do+ lift $ modify $ Map.insert an res+ return res+ _ -> do+ CL.drop 1+ s <- case me of+ Just (EventScalar v tag style a') -> parseScalar v a' style tag+ _ -> liftIO $ throwIO $ UnexpectedEvent me Nothing+ o <- parseO++ let al = M.insert s o front+ al' = if s == pack "<<"+ then case o of+ Object l -> M.union al l+ Array l -> M.union al $ foldl merge' M.empty $ V.toList l+ _ -> al+ else al+ parseM a $ M.insert s o al'+ where merge' al (Object om) = M.union al om+ merge' al _ = al++decode :: FromJSON a+ => ByteString+ -> Maybe a+decode bs = unsafePerformIO+ $ fmap (either (const Nothing) (either (const Nothing) Just))+ $ decodeHelper (Y.decode bs)++decodeFile :: FromJSON a+ => FilePath+ -> IO (Maybe a)+decodeFile fp = decodeHelper (Y.decodeFile fp) >>= either throwIO (return . either (const Nothing) id)++decodeEither :: FromJSON a => ByteString -> Either String a+decodeEither bs = unsafePerformIO+ $ fmap (either (Left . show) id)+ $ decodeHelper (Y.decode bs)++decodeHelper :: FromJSON a+ => C.Source Parse Y.Event+ -> IO (Either ParseException (Either String a))+decodeHelper src = do+ x <- try $ C.runResourceT $ flip evalStateT Map.empty $ src C.$$ parse+ case x of+ Left e+ | Just pe <- fromException e -> return $ Left pe+ | Just ye <- fromException e -> return $ Left $ InvalidYaml $ Just $ show (ye :: YamlException)+ | otherwise -> throwIO e+ Right y -> return $ Right $ parseEither parseJSON y++array :: [Value] -> Value+array = Array . V.fromList++parseMonad :: Monad m => (a -> Parser b) -> a -> m b+parseMonad p = either fail return . parseEither p
LICENSE view
@@ -1,25 +1,25 @@-The following license covers this documentation, and the source code, except -where otherwise indicated. - -Copyright 2008, Michael Snoyman. All rights reserved. - -Redistribution and use in source and binary forms, with or without -modification, are permitted provided that the following conditions are met: - -* Redistributions of source code must retain the above copyright notice, this - list of conditions and the following disclaimer. - -* Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - -THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS "AS IS" AND ANY EXPRESS OR -IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF -MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO -EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT, -INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT -NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, -OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF -LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE -OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF -ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +The following license covers this documentation, and the source code, except+where otherwise indicated.++Copyright 2008, Michael Snoyman. All rights reserved.++Redistribution and use in source and binary forms, with or without+modification, are permitted provided that the following conditions are met:++* Redistributions of source code must retain the above copyright notice, this+ list of conditions and the following disclaimer.++* Redistributions in binary form must reproduce the above copyright notice,+ this list of conditions and the following disclaimer in the documentation+ and/or other materials provided with the distribution.++THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS "AS IS" AND ANY EXPRESS OR+IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO+EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT,+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT+NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,+OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF+ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Setup.lhs view
@@ -1,7 +1,7 @@-#!/usr/bin/env runhaskell - -> module Main where -> import Distribution.Simple - -> main :: IO () -> main = defaultMain +#!/usr/bin/env runhaskell++> module Main where+> import Distribution.Simple++> main :: IO ()+> main = defaultMain
Text/Libyaml.hs view
@@ -1,595 +1,595 @@-{-# LANGUAGE EmptyDataDecls #-} -{-# LANGUAGE ForeignFunctionInterface #-} -{-# LANGUAGE DeriveDataTypeable #-} -{-# LANGUAGE FlexibleContexts #-} -{-# LANGUAGE FlexibleInstances #-} -{-# LANGUAGE MultiParamTypeClasses #-} -{-# LANGUAGE PackageImports #-} -{-# LANGUAGE GeneralizedNewtypeDeriving #-} -{-# LANGUAGE RankNTypes #-} -{-# LANGUAGE CPP #-} - --- | Low-level, streaming YAML interface. For a higher-level interface, see --- "Data.Yaml". -module Text.Libyaml - ( -- * The event stream - Event (..) - , Style (..) - , Tag (..) - , AnchorName - , Anchor - -- * Encoding and decoding - , encode - , decode - , encodeFile - , decodeFile - -- * Exception - , YamlException (..) - ) where - -import qualified Data.ByteString.Internal as B -import qualified Data.ByteString.Char8 as B8 -import qualified Data.ByteString -import qualified Data.ByteString.Unsafe as BU -import Data.ByteString (ByteString, packCStringLen) -import Control.Monad -import Foreign.C -import Foreign.Ptr -import Foreign.ForeignPtr -import Foreign.Marshal.Alloc -import Data.Data - -import Control.Monad.IO.Class - -import Control.Exception (throwIO, Exception, finally) -import Control.Applicative -import Control.Monad.Trans.Resource -import qualified Data.Conduit as C -import Control.Exception (mask_) - -data Event = - EventStreamStart - | EventStreamEnd - | EventDocumentStart - | EventDocumentEnd - | EventAlias !AnchorName - | EventScalar !ByteString !Tag !Style !Anchor - | EventSequenceStart !Anchor - | EventSequenceEnd - | EventMappingStart !Anchor - | EventMappingEnd - deriving (Show, Eq) - -data Style = Any - | Plain - | SingleQuoted - | DoubleQuoted - | Literal - | Folded - deriving (Show, Read, Eq, Enum, Bounded, Ord, Data, Typeable) - -data Tag = StrTag - | FloatTag - | NullTag - | BoolTag - | SetTag - | IntTag - | SeqTag - | MapTag - | UriTag String - | NoTag - deriving (Show, Eq, Read, Data, Typeable) - -type AnchorName = String -type Anchor = Maybe AnchorName - -tagToString :: Tag -> String -tagToString StrTag = "tag:yaml.org,2002:str" -tagToString FloatTag = "tag:yaml.org,2002:float" -tagToString NullTag = "tag:yaml.org,2002:null" -tagToString BoolTag = "tag:yaml.org,2002:bool" -tagToString SetTag = "tag:yaml.org,2002:set" -tagToString IntTag = "tag:yaml.org,2002:int" -tagToString SeqTag = "tag:yaml.org,2002:seq" -tagToString MapTag = "tag:yaml.org,2002:map" -tagToString (UriTag s) = s -tagToString NoTag = "" - -bsToTag :: ByteString -> Tag -bsToTag = stringToTag . B8.unpack - -stringToTag :: String -> Tag -stringToTag "tag:yaml.org,2002:str" = StrTag -stringToTag "tag:yaml.org,2002:float" = FloatTag -stringToTag "tag:yaml.org,2002:null" = NullTag -stringToTag "tag:yaml.org,2002:bool" = BoolTag -stringToTag "tag:yaml.org,2002:set" = SetTag -stringToTag "tag:yaml.org,2002:int" = IntTag -stringToTag "tag:yaml.org,2002:seq" = SeqTag -stringToTag "tag:yaml.org,2002:map" = MapTag -stringToTag "" = NoTag -stringToTag s = UriTag s - -data ParserStruct -type Parser = Ptr ParserStruct -parserSize :: Int -parserSize = 480 - -data EventRawStruct -type EventRaw = Ptr EventRawStruct -eventSize :: Int -eventSize = 104 - -foreign import ccall unsafe "yaml_parser_initialize" - c_yaml_parser_initialize :: Parser -> IO CInt - -foreign import ccall unsafe "yaml_parser_delete" - c_yaml_parser_delete :: Parser -> IO () - -foreign import ccall unsafe "yaml_parser_set_input_string" - c_yaml_parser_set_input_string :: Parser - -> Ptr CUChar - -> CULong - -> IO () - -foreign import ccall unsafe "yaml_parser_set_input_file" - c_yaml_parser_set_input_file :: Parser - -> File - -> IO () - -data FileStruct -type File = Ptr FileStruct - -foreign import ccall unsafe "fopen" - c_fopen :: Ptr CChar - -> Ptr CChar - -> IO File - -foreign import ccall unsafe "fclose" - c_fclose :: File - -> IO () - -foreign import ccall unsafe "fclose_helper" - c_fclose_helper :: File -> IO () - -foreign import ccall unsafe "yaml_parser_parse" - c_yaml_parser_parse :: Parser -> EventRaw -> IO CInt - -foreign import ccall unsafe "yaml_event_delete" - c_yaml_event_delete :: EventRaw -> IO () - -foreign import ccall "get_parser_error_problem" - c_get_parser_error_problem :: Parser -> IO (Ptr CUChar) - -foreign import ccall "get_parser_error_context" - c_get_parser_error_context :: Parser -> IO (Ptr CUChar) - -foreign import ccall unsafe "get_parser_error_offset" - c_get_parser_error_offset :: Parser -> IO CULong - -makeString :: MonadIO m => (a -> m (Ptr CUChar)) -> a -> m String -makeString f a = do - cchar <- castPtr `liftM` f a - if cchar == nullPtr - then return "" - else liftIO $ peekCString cchar - -data EventType = YamlNoEvent - | YamlStreamStartEvent - | YamlStreamEndEvent - | YamlDocumentStartEvent - | YamlDocumentEndEvent - | YamlAliasEvent - | YamlScalarEvent - | YamlSequenceStartEvent - | YamlSequenceEndEvent - | YamlMappingStartEvent - | YamlMappingEndEvent - deriving (Enum,Show) - -foreign import ccall unsafe "get_event_type" - c_get_event_type :: EventRaw -> IO CInt - -foreign import ccall unsafe "get_scalar_value" - c_get_scalar_value :: EventRaw -> IO (Ptr CUChar) - -foreign import ccall unsafe "get_scalar_length" - c_get_scalar_length :: EventRaw -> IO CULong - -foreign import ccall unsafe "get_scalar_tag" - c_get_scalar_tag :: EventRaw -> IO (Ptr CUChar) - -foreign import ccall unsafe "get_scalar_tag_len" - c_get_scalar_tag_len :: EventRaw -> IO CULong - -foreign import ccall unsafe "get_scalar_style" - c_get_scalar_style :: EventRaw -> IO CInt - -foreign import ccall unsafe "get_scalar_anchor" - c_get_scalar_anchor :: EventRaw -> IO CString - -foreign import ccall unsafe "get_sequence_start_anchor" - c_get_sequence_start_anchor :: EventRaw -> IO CString - -foreign import ccall unsafe "get_mapping_start_anchor" - c_get_mapping_start_anchor :: EventRaw -> IO CString - -foreign import ccall unsafe "get_alias_anchor" - c_get_alias_anchor :: EventRaw -> IO CString - -getEvent :: EventRaw -> IO (Maybe Event) -getEvent er = do - et <- c_get_event_type er - case toEnum $ fromEnum et of - YamlNoEvent -> return Nothing - YamlStreamStartEvent -> return $ Just EventStreamStart - YamlStreamEndEvent -> return $ Just EventStreamEnd - YamlDocumentStartEvent -> return $ Just EventDocumentStart - YamlDocumentEndEvent -> return $ Just EventDocumentEnd - YamlAliasEvent -> do - yanchor <- c_get_alias_anchor er - anchor <- if yanchor == nullPtr - then error "got YamlAliasEvent with empty anchor" - else peekCString yanchor - return $ Just $ EventAlias anchor - YamlScalarEvent -> do - yvalue <- c_get_scalar_value er - ylen <- c_get_scalar_length er - ytag <- c_get_scalar_tag er - ytag_len <- c_get_scalar_tag_len er - ystyle <- c_get_scalar_style er - let ytag_len' = fromEnum ytag_len - let yvalue' = castPtr yvalue - let ytag' = castPtr ytag - let ylen' = fromEnum ylen - bs <- packCStringLen (yvalue', ylen') - tagbs <- - if ytag_len' == 0 - then return Data.ByteString.empty - else packCStringLen (ytag', ytag_len') - let style = toEnum $ fromEnum ystyle - yanchor <- c_get_scalar_anchor er - anchor <- if yanchor == nullPtr - then return Nothing - else fmap Just $ peekCString yanchor - return $ Just $ EventScalar bs (bsToTag tagbs) style anchor - YamlSequenceStartEvent -> do - yanchor <- c_get_sequence_start_anchor er - anchor <- if yanchor == nullPtr - then return Nothing - else fmap Just $ peekCString yanchor - return $ Just $ EventSequenceStart anchor - YamlSequenceEndEvent -> return $ Just EventSequenceEnd - YamlMappingStartEvent -> do - yanchor <- c_get_mapping_start_anchor er - anchor <- if yanchor == nullPtr - then return Nothing - else fmap Just $ peekCString yanchor - return $ Just $ EventMappingStart anchor - YamlMappingEndEvent -> return $ Just EventMappingEnd - --- Emitter - -data EmitterStruct -type Emitter = Ptr EmitterStruct -emitterSize :: Int -emitterSize = 432 - -foreign import ccall unsafe "yaml_emitter_initialize" - c_yaml_emitter_initialize :: Emitter -> IO CInt - -foreign import ccall unsafe "yaml_emitter_delete" - c_yaml_emitter_delete :: Emitter -> IO () - -data BufferStruct -type Buffer = Ptr BufferStruct -bufferSize :: Int -bufferSize = 16 - -foreign import ccall unsafe "buffer_init" - c_buffer_init :: Buffer -> IO () - -foreign import ccall unsafe "get_buffer_buff" - c_get_buffer_buff :: Buffer -> IO (Ptr CUChar) - -foreign import ccall unsafe "get_buffer_used" - c_get_buffer_used :: Buffer -> IO CULong - -foreign import ccall unsafe "my_emitter_set_output" - c_my_emitter_set_output :: Emitter -> Buffer -> IO () - -foreign import ccall unsafe "yaml_emitter_set_output_file" - c_yaml_emitter_set_output_file :: Emitter -> File -> IO () - -foreign import ccall unsafe "yaml_emitter_emit" - c_yaml_emitter_emit :: Emitter -> EventRaw -> IO CInt - -foreign import ccall unsafe "yaml_stream_start_event_initialize" - c_yaml_stream_start_event_initialize :: EventRaw -> CInt -> IO CInt - -foreign import ccall unsafe "yaml_stream_end_event_initialize" - c_yaml_stream_end_event_initialize :: EventRaw -> IO CInt - -foreign import ccall unsafe "yaml_scalar_event_initialize" - c_yaml_scalar_event_initialize - :: EventRaw - -> Ptr CUChar -- anchor - -> Ptr CUChar -- tag - -> Ptr CUChar -- value - -> CInt -- length - -> CInt -- plain_implicit - -> CInt -- quoted_implicit - -> CInt -- style - -> IO CInt - -foreign import ccall unsafe "simple_document_start" - c_simple_document_start :: EventRaw -> IO CInt - -foreign import ccall unsafe "yaml_document_end_event_initialize" - c_yaml_document_end_event_initialize :: EventRaw -> CInt -> IO CInt - -foreign import ccall unsafe "yaml_sequence_start_event_initialize" - c_yaml_sequence_start_event_initialize - :: EventRaw - -> Ptr CUChar - -> Ptr CUChar - -> CInt - -> CInt - -> IO CInt - -foreign import ccall unsafe "yaml_sequence_end_event_initialize" - c_yaml_sequence_end_event_initialize :: EventRaw -> IO CInt - -foreign import ccall unsafe "yaml_mapping_start_event_initialize" - c_yaml_mapping_start_event_initialize - :: EventRaw - -> Ptr CUChar - -> Ptr CUChar - -> CInt - -> CInt - -> IO CInt - -foreign import ccall unsafe "yaml_mapping_end_event_initialize" - c_yaml_mapping_end_event_initialize :: EventRaw -> IO CInt - -foreign import ccall unsafe "yaml_alias_event_initialize" - c_yaml_alias_event_initialize - :: EventRaw - -> Ptr CUChar - -> IO CInt - -toEventRaw :: Event -> (EventRaw -> IO a) -> IO a -toEventRaw e f = allocaBytes eventSize $ \er -> do - ret <- case e of - EventStreamStart -> - c_yaml_stream_start_event_initialize - er - 0 -- YAML_ANY_ENCODING - EventStreamEnd -> - c_yaml_stream_end_event_initialize er - EventDocumentStart -> - c_simple_document_start er - EventDocumentEnd -> - c_yaml_document_end_event_initialize er 1 - EventScalar bs thetag style anchor -> do - BU.unsafeUseAsCStringLen bs $ \(value, len) -> do - let value' = castPtr value :: Ptr CUChar - len' = fromIntegral len :: CInt - let thetag' = tagToString thetag - withCString thetag' $ \tag' -> do - let style' = toEnum $ fromEnum style - tagP = castPtr tag' - qi = if null thetag' then 1 else 0 - case anchor of - Nothing -> - c_yaml_scalar_event_initialize - er - nullPtr -- anchor - tagP -- tag - value' -- value - len' -- length - 0 -- plain_implicit - qi -- quoted_implicit - style' -- style - Just anchor' -> - withCString anchor' $ \anchorP' -> do - let anchorP = castPtr anchorP' - c_yaml_scalar_event_initialize - er - anchorP -- anchor - tagP -- tag - value' -- value - len' -- length - 0 -- plain_implicit - qi -- quoted_implicit - style' -- style - EventSequenceStart Nothing -> - c_yaml_sequence_start_event_initialize - er - nullPtr - nullPtr - 1 - 0 -- YAML_ANY_SEQUENCE_STYLE - EventSequenceStart (Just anchor) -> - withCString anchor $ \anchor' -> do - let anchorP = castPtr anchor' - c_yaml_sequence_start_event_initialize - er - anchorP - nullPtr - 1 - 0 -- YAML_ANY_SEQUENCE_STYLE - EventSequenceEnd -> - c_yaml_sequence_end_event_initialize er - EventMappingStart Nothing -> - c_yaml_mapping_start_event_initialize - er - nullPtr - nullPtr - 1 - 0 -- YAML_ANY_SEQUENCE_STYLE - EventMappingStart (Just anchor) -> - withCString anchor $ \anchor' -> do - let anchorP = castPtr anchor' - c_yaml_mapping_start_event_initialize - er - anchorP - nullPtr - 1 - 0 -- YAML_ANY_SEQUENCE_STYLE - EventMappingEnd -> - c_yaml_mapping_end_event_initialize er - EventAlias anchor -> - withCString anchor $ \anchorP' -> do - let anchorP = castPtr anchorP' - c_yaml_alias_event_initialize - er - anchorP - unless (ret == 1) $ throwIO $ ToEventRawException ret - f er - -newtype ToEventRawException = ToEventRawException CInt - deriving (Show, Typeable) -instance Exception ToEventRawException - -decode :: C.MonadResource m => B.ByteString -> C.Source m Event -decode bs = - C.sourceIO alloc cleanup (runParser . fst) - where - alloc = mask_ $ do - ptr <- mallocBytes parserSize - res <- c_yaml_parser_initialize ptr - if res == 0 - then do - c_yaml_parser_delete ptr - free ptr - throwIO $ YamlException "Yaml out of memory" - else do - let (bsfptr, offset, len) = B.toForeignPtr bs - let bsptrOrig = unsafeForeignPtrToPtr bsfptr - let bsptr = castPtr bsptrOrig `plusPtr` offset - c_yaml_parser_set_input_string ptr bsptr (fromIntegral len) - return (ptr, bsfptr) - cleanup (ptr, bsfptr) = do - touchForeignPtr bsfptr - c_yaml_parser_delete ptr - free ptr - -decodeFile :: C.MonadResource m => FilePath -> C.Source m Event -decodeFile file = - C.sourceIO alloc cleanup (runParser . fst) - where - alloc = mask_ $ do - ptr <- mallocBytes parserSize - res <- c_yaml_parser_initialize ptr - if res == 0 - then do - c_yaml_parser_delete ptr - free ptr - throwIO $ YamlException "Yaml out of memory" - else do - file' <- liftIO - $ withCString file $ \file' -> withCString "r" $ \r' -> - c_fopen file' r' - if file' == nullPtr - then do - c_fclose_helper file' - c_yaml_parser_delete ptr - free ptr - throwIO $ YamlException - $ "Yaml file not found: " ++ file - else do - c_yaml_parser_set_input_file ptr file' - return (ptr, file') - cleanup (ptr, file') = do - c_fclose_helper file' - c_yaml_parser_delete ptr - free ptr - -runParser :: C.MonadResource m => Parser -> m (C.SourceIOResult Event) -runParser parser = liftIO $ do - e <- parserParseOne' parser - case e of - Left err -> throwIO $ YamlException err - Right Nothing -> return $ C.IOClosed - Right (Just ev) -> return $ C.IOOpen ev - -parserParseOne' :: Parser - -> IO (Either String (Maybe Event)) -parserParseOne' parser = allocaBytes eventSize $ \er -> do - res <- liftIO $ c_yaml_parser_parse parser er - flip finally (c_yaml_event_delete er) $ - if res == 0 - then do - problem <- makeString c_get_parser_error_problem parser - context <- makeString c_get_parser_error_context parser - offset <- c_get_parser_error_offset parser - return $ Left $ concat - [ "YAML parse error: " - , problem - , "\nContext: " - , context - , "\nOffset: " - , show offset - , "\n" - ] - else Right <$> getEvent er - -encode :: C.MonadResource m => C.Sink Event m ByteString -encode = - runEmitter alloc close - where - alloc emitter = do - fbuf <- mallocForeignPtrBytes bufferSize - withForeignPtr fbuf c_buffer_init - withForeignPtr fbuf $ c_my_emitter_set_output emitter - return fbuf - close fbuf = withForeignPtr fbuf $ \b -> do - ptr' <- c_get_buffer_buff b - len <- c_get_buffer_used b - fptr <- newForeignPtr_ $ castPtr ptr' - return $ B.fromForeignPtr fptr 0 $ fromIntegral len - -encodeFile :: C.MonadResource m - => FilePath - -> C.Sink Event m () -encodeFile filePath = - C.PipeM msink (return ()) - where - msink = do - (_releaseKey, file) <- flip allocate c_fclose $ do - file <- liftIO $ withCString filePath $ - \filePath' -> withCString "w" $ - \w' -> c_fopen filePath' w' - if (file == nullPtr) - then throwIO $ YamlException $ "could not open file for write: " ++ filePath - else return file - return $ runEmitter (alloc file) (return) -- FIXME close file early - alloc file emitter = do - c_yaml_emitter_set_output_file emitter file - return () - -runEmitter :: C.MonadResource m - => (Emitter -> IO a) -- ^ alloc - -> (a -> IO b) -- ^ close - -> C.Sink Event m b -runEmitter allocI closeI = - C.sinkIO alloc cleanup push close - where - alloc = mask_ $ do - emitter <- mallocBytes emitterSize - res <- c_yaml_emitter_initialize emitter - when (res == 0) $ throwIO $ YamlException "c_yaml_emitter_initialize failed" - a <- allocI emitter - return (emitter, a) - cleanup (emitter, _) = do - c_yaml_emitter_delete emitter - free emitter - push (emitter, _) e = do - _ <- liftIO $ toEventRaw e $ c_yaml_emitter_emit emitter - return C.IOProcessing - close (_, a) = liftIO $ closeI a - -data YamlException = YamlException String - deriving (Show, Typeable) -instance Exception YamlException +{-# LANGUAGE EmptyDataDecls #-}+{-# LANGUAGE ForeignFunctionInterface #-}+{-# LANGUAGE DeriveDataTypeable #-}+{-# LANGUAGE FlexibleContexts #-}+{-# LANGUAGE FlexibleInstances #-}+{-# LANGUAGE MultiParamTypeClasses #-}+{-# LANGUAGE PackageImports #-}+{-# LANGUAGE GeneralizedNewtypeDeriving #-}+{-# LANGUAGE RankNTypes #-}+{-# LANGUAGE CPP #-}++-- | Low-level, streaming YAML interface. For a higher-level interface, see+-- "Data.Yaml".+module Text.Libyaml+ ( -- * The event stream+ Event (..)+ , Style (..)+ , Tag (..)+ , AnchorName+ , Anchor+ -- * Encoding and decoding+ , encode+ , decode+ , encodeFile+ , decodeFile+ -- * Exception+ , YamlException (..)+ ) where++import qualified Data.ByteString.Internal as B+import qualified Data.ByteString.Char8 as B8+import qualified Data.ByteString+import qualified Data.ByteString.Unsafe as BU+import Data.ByteString (ByteString, packCStringLen)+import Control.Monad+import Foreign.C+import Foreign.Ptr+import Foreign.ForeignPtr+import Foreign.Marshal.Alloc+import Data.Data++import Control.Monad.IO.Class++import Control.Exception (throwIO, Exception, finally)+import Control.Applicative+import Control.Monad.Trans.Resource+import qualified Data.Conduit as C+import Control.Exception (mask_)++data Event =+ EventStreamStart+ | EventStreamEnd+ | EventDocumentStart+ | EventDocumentEnd+ | EventAlias !AnchorName+ | EventScalar !ByteString !Tag !Style !Anchor+ | EventSequenceStart !Anchor+ | EventSequenceEnd+ | EventMappingStart !Anchor+ | EventMappingEnd+ deriving (Show, Eq)++data Style = Any+ | Plain+ | SingleQuoted+ | DoubleQuoted+ | Literal+ | Folded+ deriving (Show, Read, Eq, Enum, Bounded, Ord, Data, Typeable)++data Tag = StrTag+ | FloatTag+ | NullTag+ | BoolTag+ | SetTag+ | IntTag+ | SeqTag+ | MapTag+ | UriTag String+ | NoTag+ deriving (Show, Eq, Read, Data, Typeable)++type AnchorName = String+type Anchor = Maybe AnchorName++tagToString :: Tag -> String+tagToString StrTag = "tag:yaml.org,2002:str"+tagToString FloatTag = "tag:yaml.org,2002:float"+tagToString NullTag = "tag:yaml.org,2002:null"+tagToString BoolTag = "tag:yaml.org,2002:bool"+tagToString SetTag = "tag:yaml.org,2002:set"+tagToString IntTag = "tag:yaml.org,2002:int"+tagToString SeqTag = "tag:yaml.org,2002:seq"+tagToString MapTag = "tag:yaml.org,2002:map"+tagToString (UriTag s) = s+tagToString NoTag = ""++bsToTag :: ByteString -> Tag+bsToTag = stringToTag . B8.unpack++stringToTag :: String -> Tag+stringToTag "tag:yaml.org,2002:str" = StrTag+stringToTag "tag:yaml.org,2002:float" = FloatTag+stringToTag "tag:yaml.org,2002:null" = NullTag+stringToTag "tag:yaml.org,2002:bool" = BoolTag+stringToTag "tag:yaml.org,2002:set" = SetTag+stringToTag "tag:yaml.org,2002:int" = IntTag+stringToTag "tag:yaml.org,2002:seq" = SeqTag+stringToTag "tag:yaml.org,2002:map" = MapTag+stringToTag "" = NoTag+stringToTag s = UriTag s++data ParserStruct+type Parser = Ptr ParserStruct+parserSize :: Int+parserSize = 480++data EventRawStruct+type EventRaw = Ptr EventRawStruct+eventSize :: Int+eventSize = 104++foreign import ccall unsafe "yaml_parser_initialize"+ c_yaml_parser_initialize :: Parser -> IO CInt++foreign import ccall unsafe "yaml_parser_delete"+ c_yaml_parser_delete :: Parser -> IO ()++foreign import ccall unsafe "yaml_parser_set_input_string"+ c_yaml_parser_set_input_string :: Parser+ -> Ptr CUChar+ -> CULong+ -> IO ()++foreign import ccall unsafe "yaml_parser_set_input_file"+ c_yaml_parser_set_input_file :: Parser+ -> File+ -> IO ()++data FileStruct+type File = Ptr FileStruct++foreign import ccall unsafe "fopen"+ c_fopen :: Ptr CChar+ -> Ptr CChar+ -> IO File++foreign import ccall unsafe "fclose"+ c_fclose :: File+ -> IO ()++foreign import ccall unsafe "fclose_helper"+ c_fclose_helper :: File -> IO ()++foreign import ccall unsafe "yaml_parser_parse"+ c_yaml_parser_parse :: Parser -> EventRaw -> IO CInt++foreign import ccall unsafe "yaml_event_delete"+ c_yaml_event_delete :: EventRaw -> IO ()++foreign import ccall "get_parser_error_problem"+ c_get_parser_error_problem :: Parser -> IO (Ptr CUChar)++foreign import ccall "get_parser_error_context"+ c_get_parser_error_context :: Parser -> IO (Ptr CUChar)++foreign import ccall unsafe "get_parser_error_offset"+ c_get_parser_error_offset :: Parser -> IO CULong++makeString :: MonadIO m => (a -> m (Ptr CUChar)) -> a -> m String+makeString f a = do+ cchar <- castPtr `liftM` f a+ if cchar == nullPtr+ then return ""+ else liftIO $ peekCString cchar++data EventType = YamlNoEvent+ | YamlStreamStartEvent+ | YamlStreamEndEvent+ | YamlDocumentStartEvent+ | YamlDocumentEndEvent+ | YamlAliasEvent+ | YamlScalarEvent+ | YamlSequenceStartEvent+ | YamlSequenceEndEvent+ | YamlMappingStartEvent+ | YamlMappingEndEvent+ deriving (Enum,Show)++foreign import ccall unsafe "get_event_type"+ c_get_event_type :: EventRaw -> IO CInt++foreign import ccall unsafe "get_scalar_value"+ c_get_scalar_value :: EventRaw -> IO (Ptr CUChar)++foreign import ccall unsafe "get_scalar_length"+ c_get_scalar_length :: EventRaw -> IO CULong++foreign import ccall unsafe "get_scalar_tag"+ c_get_scalar_tag :: EventRaw -> IO (Ptr CUChar)++foreign import ccall unsafe "get_scalar_tag_len"+ c_get_scalar_tag_len :: EventRaw -> IO CULong++foreign import ccall unsafe "get_scalar_style"+ c_get_scalar_style :: EventRaw -> IO CInt++foreign import ccall unsafe "get_scalar_anchor"+ c_get_scalar_anchor :: EventRaw -> IO CString++foreign import ccall unsafe "get_sequence_start_anchor"+ c_get_sequence_start_anchor :: EventRaw -> IO CString++foreign import ccall unsafe "get_mapping_start_anchor"+ c_get_mapping_start_anchor :: EventRaw -> IO CString++foreign import ccall unsafe "get_alias_anchor"+ c_get_alias_anchor :: EventRaw -> IO CString++getEvent :: EventRaw -> IO (Maybe Event)+getEvent er = do+ et <- c_get_event_type er+ case toEnum $ fromEnum et of+ YamlNoEvent -> return Nothing+ YamlStreamStartEvent -> return $ Just EventStreamStart+ YamlStreamEndEvent -> return $ Just EventStreamEnd+ YamlDocumentStartEvent -> return $ Just EventDocumentStart+ YamlDocumentEndEvent -> return $ Just EventDocumentEnd+ YamlAliasEvent -> do+ yanchor <- c_get_alias_anchor er+ anchor <- if yanchor == nullPtr+ then error "got YamlAliasEvent with empty anchor"+ else peekCString yanchor+ return $ Just $ EventAlias anchor+ YamlScalarEvent -> do+ yvalue <- c_get_scalar_value er+ ylen <- c_get_scalar_length er+ ytag <- c_get_scalar_tag er+ ytag_len <- c_get_scalar_tag_len er+ ystyle <- c_get_scalar_style er+ let ytag_len' = fromEnum ytag_len+ let yvalue' = castPtr yvalue+ let ytag' = castPtr ytag+ let ylen' = fromEnum ylen+ bs <- packCStringLen (yvalue', ylen')+ tagbs <-+ if ytag_len' == 0+ then return Data.ByteString.empty+ else packCStringLen (ytag', ytag_len')+ let style = toEnum $ fromEnum ystyle+ yanchor <- c_get_scalar_anchor er+ anchor <- if yanchor == nullPtr+ then return Nothing+ else fmap Just $ peekCString yanchor+ return $ Just $ EventScalar bs (bsToTag tagbs) style anchor+ YamlSequenceStartEvent -> do+ yanchor <- c_get_sequence_start_anchor er+ anchor <- if yanchor == nullPtr+ then return Nothing+ else fmap Just $ peekCString yanchor+ return $ Just $ EventSequenceStart anchor+ YamlSequenceEndEvent -> return $ Just EventSequenceEnd+ YamlMappingStartEvent -> do+ yanchor <- c_get_mapping_start_anchor er+ anchor <- if yanchor == nullPtr+ then return Nothing+ else fmap Just $ peekCString yanchor+ return $ Just $ EventMappingStart anchor+ YamlMappingEndEvent -> return $ Just EventMappingEnd++-- Emitter++data EmitterStruct+type Emitter = Ptr EmitterStruct+emitterSize :: Int+emitterSize = 432++foreign import ccall unsafe "yaml_emitter_initialize"+ c_yaml_emitter_initialize :: Emitter -> IO CInt++foreign import ccall unsafe "yaml_emitter_delete"+ c_yaml_emitter_delete :: Emitter -> IO ()++data BufferStruct+type Buffer = Ptr BufferStruct+bufferSize :: Int+bufferSize = 16++foreign import ccall unsafe "buffer_init"+ c_buffer_init :: Buffer -> IO ()++foreign import ccall unsafe "get_buffer_buff"+ c_get_buffer_buff :: Buffer -> IO (Ptr CUChar)++foreign import ccall unsafe "get_buffer_used"+ c_get_buffer_used :: Buffer -> IO CULong++foreign import ccall unsafe "my_emitter_set_output"+ c_my_emitter_set_output :: Emitter -> Buffer -> IO ()++foreign import ccall unsafe "yaml_emitter_set_output_file"+ c_yaml_emitter_set_output_file :: Emitter -> File -> IO ()++foreign import ccall unsafe "yaml_emitter_emit"+ c_yaml_emitter_emit :: Emitter -> EventRaw -> IO CInt++foreign import ccall unsafe "yaml_stream_start_event_initialize"+ c_yaml_stream_start_event_initialize :: EventRaw -> CInt -> IO CInt++foreign import ccall unsafe "yaml_stream_end_event_initialize"+ c_yaml_stream_end_event_initialize :: EventRaw -> IO CInt++foreign import ccall unsafe "yaml_scalar_event_initialize"+ c_yaml_scalar_event_initialize+ :: EventRaw+ -> Ptr CUChar -- anchor+ -> Ptr CUChar -- tag+ -> Ptr CUChar -- value+ -> CInt -- length+ -> CInt -- plain_implicit+ -> CInt -- quoted_implicit+ -> CInt -- style+ -> IO CInt++foreign import ccall unsafe "simple_document_start"+ c_simple_document_start :: EventRaw -> IO CInt++foreign import ccall unsafe "yaml_document_end_event_initialize"+ c_yaml_document_end_event_initialize :: EventRaw -> CInt -> IO CInt++foreign import ccall unsafe "yaml_sequence_start_event_initialize"+ c_yaml_sequence_start_event_initialize+ :: EventRaw+ -> Ptr CUChar+ -> Ptr CUChar+ -> CInt+ -> CInt+ -> IO CInt++foreign import ccall unsafe "yaml_sequence_end_event_initialize"+ c_yaml_sequence_end_event_initialize :: EventRaw -> IO CInt++foreign import ccall unsafe "yaml_mapping_start_event_initialize"+ c_yaml_mapping_start_event_initialize+ :: EventRaw+ -> Ptr CUChar+ -> Ptr CUChar+ -> CInt+ -> CInt+ -> IO CInt++foreign import ccall unsafe "yaml_mapping_end_event_initialize"+ c_yaml_mapping_end_event_initialize :: EventRaw -> IO CInt++foreign import ccall unsafe "yaml_alias_event_initialize"+ c_yaml_alias_event_initialize+ :: EventRaw+ -> Ptr CUChar+ -> IO CInt++toEventRaw :: Event -> (EventRaw -> IO a) -> IO a+toEventRaw e f = allocaBytes eventSize $ \er -> do+ ret <- case e of+ EventStreamStart ->+ c_yaml_stream_start_event_initialize+ er+ 0 -- YAML_ANY_ENCODING+ EventStreamEnd ->+ c_yaml_stream_end_event_initialize er+ EventDocumentStart ->+ c_simple_document_start er+ EventDocumentEnd ->+ c_yaml_document_end_event_initialize er 1+ EventScalar bs thetag style anchor -> do+ BU.unsafeUseAsCStringLen bs $ \(value, len) -> do+ let value' = castPtr value :: Ptr CUChar+ len' = fromIntegral len :: CInt+ let thetag' = tagToString thetag+ withCString thetag' $ \tag' -> do+ let style' = toEnum $ fromEnum style+ tagP = castPtr tag'+ qi = if null thetag' then 1 else 0+ case anchor of+ Nothing ->+ c_yaml_scalar_event_initialize+ er+ nullPtr -- anchor+ tagP -- tag+ value' -- value+ len' -- length+ 0 -- plain_implicit+ qi -- quoted_implicit+ style' -- style+ Just anchor' ->+ withCString anchor' $ \anchorP' -> do+ let anchorP = castPtr anchorP'+ c_yaml_scalar_event_initialize+ er+ anchorP -- anchor+ tagP -- tag+ value' -- value+ len' -- length+ 0 -- plain_implicit+ qi -- quoted_implicit+ style' -- style+ EventSequenceStart Nothing ->+ c_yaml_sequence_start_event_initialize+ er+ nullPtr+ nullPtr+ 1+ 0 -- YAML_ANY_SEQUENCE_STYLE+ EventSequenceStart (Just anchor) ->+ withCString anchor $ \anchor' -> do+ let anchorP = castPtr anchor'+ c_yaml_sequence_start_event_initialize+ er+ anchorP+ nullPtr+ 1+ 0 -- YAML_ANY_SEQUENCE_STYLE+ EventSequenceEnd ->+ c_yaml_sequence_end_event_initialize er+ EventMappingStart Nothing ->+ c_yaml_mapping_start_event_initialize+ er+ nullPtr+ nullPtr+ 1+ 0 -- YAML_ANY_SEQUENCE_STYLE+ EventMappingStart (Just anchor) ->+ withCString anchor $ \anchor' -> do+ let anchorP = castPtr anchor'+ c_yaml_mapping_start_event_initialize+ er+ anchorP+ nullPtr+ 1+ 0 -- YAML_ANY_SEQUENCE_STYLE+ EventMappingEnd ->+ c_yaml_mapping_end_event_initialize er+ EventAlias anchor ->+ withCString anchor $ \anchorP' -> do+ let anchorP = castPtr anchorP'+ c_yaml_alias_event_initialize+ er+ anchorP+ unless (ret == 1) $ throwIO $ ToEventRawException ret+ f er++newtype ToEventRawException = ToEventRawException CInt+ deriving (Show, Typeable)+instance Exception ToEventRawException++decode :: C.MonadResource m => B.ByteString -> C.Source m Event+decode bs =+ C.sourceIO alloc cleanup (runParser . fst)+ where+ alloc = mask_ $ do+ ptr <- mallocBytes parserSize+ res <- c_yaml_parser_initialize ptr+ if res == 0+ then do+ c_yaml_parser_delete ptr+ free ptr+ throwIO $ YamlException "Yaml out of memory"+ else do+ let (bsfptr, offset, len) = B.toForeignPtr bs+ let bsptrOrig = unsafeForeignPtrToPtr bsfptr+ let bsptr = castPtr bsptrOrig `plusPtr` offset+ c_yaml_parser_set_input_string ptr bsptr (fromIntegral len)+ return (ptr, bsfptr)+ cleanup (ptr, bsfptr) = do+ touchForeignPtr bsfptr+ c_yaml_parser_delete ptr+ free ptr++decodeFile :: C.MonadResource m => FilePath -> C.Source m Event+decodeFile file =+ C.sourceIO alloc cleanup (runParser . fst)+ where+ alloc = mask_ $ do+ ptr <- mallocBytes parserSize+ res <- c_yaml_parser_initialize ptr+ if res == 0+ then do+ c_yaml_parser_delete ptr+ free ptr+ throwIO $ YamlException "Yaml out of memory"+ else do+ file' <- liftIO+ $ withCString file $ \file' -> withCString "r" $ \r' ->+ c_fopen file' r'+ if file' == nullPtr+ then do+ c_fclose_helper file'+ c_yaml_parser_delete ptr+ free ptr+ throwIO $ YamlException+ $ "Yaml file not found: " ++ file+ else do+ c_yaml_parser_set_input_file ptr file'+ return (ptr, file')+ cleanup (ptr, file') = do+ c_fclose_helper file'+ c_yaml_parser_delete ptr+ free ptr++runParser :: C.MonadResource m => Parser -> m (C.SourceIOResult Event)+runParser parser = liftIO $ do+ e <- parserParseOne' parser+ case e of+ Left err -> throwIO $ YamlException err+ Right Nothing -> return $ C.IOClosed+ Right (Just ev) -> return $ C.IOOpen ev++parserParseOne' :: Parser+ -> IO (Either String (Maybe Event))+parserParseOne' parser = allocaBytes eventSize $ \er -> do+ res <- liftIO $ c_yaml_parser_parse parser er+ flip finally (c_yaml_event_delete er) $+ if res == 0+ then do+ problem <- makeString c_get_parser_error_problem parser+ context <- makeString c_get_parser_error_context parser+ offset <- c_get_parser_error_offset parser+ return $ Left $ concat+ [ "YAML parse error: "+ , problem+ , "\nContext: "+ , context+ , "\nOffset: "+ , show offset+ , "\n"+ ]+ else Right <$> getEvent er++encode :: C.MonadResource m => C.Sink Event m ByteString+encode =+ runEmitter alloc close+ where+ alloc emitter = do+ fbuf <- mallocForeignPtrBytes bufferSize+ withForeignPtr fbuf c_buffer_init+ withForeignPtr fbuf $ c_my_emitter_set_output emitter+ return fbuf+ close fbuf = withForeignPtr fbuf $ \b -> do+ ptr' <- c_get_buffer_buff b+ len <- c_get_buffer_used b+ fptr <- newForeignPtr_ $ castPtr ptr'+ return $ B.fromForeignPtr fptr 0 $ fromIntegral len++encodeFile :: C.MonadResource m+ => FilePath+ -> C.Sink Event m ()+encodeFile filePath =+ C.PipeM msink (return ())+ where+ msink = do+ (_releaseKey, file) <- flip allocate c_fclose $ do+ file <- liftIO $ withCString filePath $+ \filePath' -> withCString "w" $+ \w' -> c_fopen filePath' w'+ if (file == nullPtr)+ then throwIO $ YamlException $ "could not open file for write: " ++ filePath+ else return file+ return $ runEmitter (alloc file) (return) -- FIXME close file early+ alloc file emitter = do+ c_yaml_emitter_set_output_file emitter file+ return ()++runEmitter :: C.MonadResource m+ => (Emitter -> IO a) -- ^ alloc+ -> (a -> IO b) -- ^ close+ -> C.Sink Event m b+runEmitter allocI closeI =+ C.sinkIO alloc cleanup push close+ where+ alloc = mask_ $ do+ emitter <- mallocBytes emitterSize+ res <- c_yaml_emitter_initialize emitter+ when (res == 0) $ throwIO $ YamlException "c_yaml_emitter_initialize failed"+ a <- allocI emitter+ return (emitter, a)+ cleanup (emitter, _) = do+ c_yaml_emitter_delete emitter+ free emitter+ push (emitter, _) e = do+ _ <- liftIO $ toEventRaw e $ c_yaml_emitter_emit emitter+ return C.IOProcessing+ close (_, a) = liftIO $ closeI a++data YamlException = YamlException String+ deriving (Show, Typeable)+instance Exception YamlException
c/helper.c view
@@ -1,142 +1,142 @@-#include <stdlib.h> -#include <string.h> -#include <stdio.h> -#include "helper.h" - -void buffer_init(buffer_t *buffer) -{ - buffer->buff = 0; - buffer->size = buffer->used = 0; -} - -int buffer_append(void *ext, unsigned char *str, size_t size) -{ - buffer_t *b = ext; - int new_size, new_used; - char *tmp; - - new_used = b->used + size; - for (new_size = b->size || 8; new_size < new_used; new_size *= 2); - - if (new_size != b->size) { - tmp = realloc(b->buff, new_size); - if (!tmp) return 0; - b->buff = tmp; - b->size = new_size; - } - - memcpy(b->buff + b->used, str, size); - b->used = new_used; - - return 1; -} - -unsigned char * get_buffer_buff(buffer_t *b) -{ - return b->buff; -} - -unsigned int get_buffer_used(buffer_t *b) -{ - return b->used; -} - -void my_emitter_set_output(yaml_emitter_t *e, buffer_t *b) -{ - yaml_emitter_set_output(e, buffer_append, b); -} - -unsigned char const * get_parser_error_problem(yaml_parser_t *p) -{ - return p->problem; -} - -unsigned char const * get_parser_error_context(yaml_parser_t *p) -{ - return p->context; -} - -unsigned int get_parser_error_offset(yaml_parser_t *p) -{ - return p->offset; -} - -unsigned char const * get_emitter_error(yaml_emitter_t *e) -{ - return e->problem; -} - -int simple_document_start(yaml_event_t *e) -{ - return yaml_document_start_event_initialize - (e, - 0, - 0, - 0, - 1); -} - -int get_event_type(yaml_event_t *e) -{ - return e->type; -} - -unsigned char * get_scalar_value(yaml_event_t *e) -{ - return e->data.scalar.value; -} - -unsigned long get_scalar_length(yaml_event_t *e) -{ - return e->data.scalar.length; -} - -unsigned char * get_scalar_tag(yaml_event_t *e) -{ - unsigned char *s = e->data.scalar.tag; - if (!s) s = ""; - return s; -} - -unsigned long get_scalar_tag_len(yaml_event_t *e) -{ - return strlen(get_scalar_tag(e)); -} - -int get_scalar_style(yaml_event_t *e) -{ - return e->data.scalar.style; -} - -unsigned char * get_scalar_anchor(yaml_event_t *e) -{ - return e->data.scalar.anchor; -} - -unsigned char * get_sequence_start_anchor(yaml_event_t *e) -{ - return e->data.sequence_start.anchor; -} - -unsigned char * get_mapping_start_anchor(yaml_event_t *e) -{ - return e->data.mapping_start.anchor; -} - -unsigned char * get_alias_anchor(yaml_event_t *e) -{ - return e->data.alias.anchor; -} - -int yaml_parser_set_input_filename(yaml_parser_t *parser, const char *filename) -{ - FILE *in = fopen(filename, "r"); - if (!in) return 0; - yaml_parser_set_input_file(parser, in); -} - -int fclose_helper(FILE *file) -{ - if (! file) return 0; - return fclose(file); -} +#include <stdlib.h>+#include <string.h>+#include <stdio.h>+#include "helper.h"++void buffer_init(buffer_t *buffer)+{+ buffer->buff = 0;+ buffer->size = buffer->used = 0;+}++int buffer_append(void *ext, unsigned char *str, size_t size)+{+ buffer_t *b = ext;+ int new_size, new_used;+ char *tmp;++ new_used = b->used + size;+ for (new_size = b->size || 8; new_size < new_used; new_size *= 2);++ if (new_size != b->size) {+ tmp = realloc(b->buff, new_size);+ if (!tmp) return 0;+ b->buff = tmp;+ b->size = new_size;+ }++ memcpy(b->buff + b->used, str, size);+ b->used = new_used;++ return 1;+}++unsigned char * get_buffer_buff(buffer_t *b)+{+ return b->buff;+}++unsigned int get_buffer_used(buffer_t *b)+{+ return b->used;+}++void my_emitter_set_output(yaml_emitter_t *e, buffer_t *b)+{+ yaml_emitter_set_output(e, buffer_append, b);+}++unsigned char const * get_parser_error_problem(yaml_parser_t *p)+{+ return p->problem;+}++unsigned char const * get_parser_error_context(yaml_parser_t *p)+{+ return p->context;+}++unsigned int get_parser_error_offset(yaml_parser_t *p)+{+ return p->offset;+}++unsigned char const * get_emitter_error(yaml_emitter_t *e)+{+ return e->problem;+}++int simple_document_start(yaml_event_t *e)+{+ return yaml_document_start_event_initialize+ (e,+ 0,+ 0,+ 0,+ 1);+}++int get_event_type(yaml_event_t *e)+{+ return e->type;+}++unsigned char * get_scalar_value(yaml_event_t *e)+{+ return e->data.scalar.value;+}++unsigned long get_scalar_length(yaml_event_t *e)+{+ return e->data.scalar.length;+}++unsigned char * get_scalar_tag(yaml_event_t *e)+{+ unsigned char *s = e->data.scalar.tag;+ if (!s) s = "";+ return s;+}++unsigned long get_scalar_tag_len(yaml_event_t *e)+{+ return strlen(get_scalar_tag(e));+}++int get_scalar_style(yaml_event_t *e)+{+ return e->data.scalar.style;+}++unsigned char * get_scalar_anchor(yaml_event_t *e)+{+ return e->data.scalar.anchor;+}++unsigned char * get_sequence_start_anchor(yaml_event_t *e)+{+ return e->data.sequence_start.anchor;+}++unsigned char * get_mapping_start_anchor(yaml_event_t *e)+{+ return e->data.mapping_start.anchor;+}++unsigned char * get_alias_anchor(yaml_event_t *e)+{+ return e->data.alias.anchor;+}++int yaml_parser_set_input_filename(yaml_parser_t *parser, const char *filename)+{+ FILE *in = fopen(filename, "r");+ if (!in) return 0;+ yaml_parser_set_input_file(parser, in);+}++int fclose_helper(FILE *file)+{+ if (! file) return 0;+ return fclose(file);+}
c/helper.h view
@@ -1,40 +1,40 @@-#ifndef __HELPER_H__ -#define __HELPER_H__ - -#include <yaml.h> - -typedef struct buffer_s { - unsigned char *buff; - unsigned int size, used; -} buffer_t; -void buffer_init(buffer_t *buffer); -int buffer_append(void *ext, unsigned char *str, size_t size); -unsigned char * get_buffer_buff(buffer_t *b); -unsigned int get_buffer_used(buffer_t *b); - -void my_emitter_set_output(yaml_emitter_t *e, buffer_t *b); - -unsigned char const * get_parser_error_problem(yaml_parser_t *p); -unsigned char const * get_parser_error_context(yaml_parser_t *p); -unsigned int get_parser_error_offset(yaml_parser_t *p); - -unsigned char const * get_emitter_error(yaml_emitter_t *e); - -int simple_document_start(yaml_event_t *e); - -int get_event_type(yaml_event_t *e); - -unsigned char * get_scalar_value(yaml_event_t *e); -unsigned long get_scalar_length(yaml_event_t *e); - -unsigned char * get_scalar_tag(yaml_event_t *e); -unsigned long get_scalar_tag_len(yaml_event_t *e); - -int get_scalar_style(yaml_event_t *e); - -unsigned char * get_scalar_anchor(yaml_event_t *e); -unsigned char * get_sequence_start_anchor(yaml_event_t *e); -unsigned char * get_mapping_start_anchor(yaml_event_t *e); -unsigned char * get_alias_anchor(yaml_event_t *e); - -#endif /* __HELPER_H__ */ +#ifndef __HELPER_H__+#define __HELPER_H__++#include <yaml.h>++typedef struct buffer_s {+ unsigned char *buff;+ unsigned int size, used;+} buffer_t;+void buffer_init(buffer_t *buffer);+int buffer_append(void *ext, unsigned char *str, size_t size);+unsigned char * get_buffer_buff(buffer_t *b);+unsigned int get_buffer_used(buffer_t *b);++void my_emitter_set_output(yaml_emitter_t *e, buffer_t *b);++unsigned char const * get_parser_error_problem(yaml_parser_t *p);+unsigned char const * get_parser_error_context(yaml_parser_t *p);+unsigned int get_parser_error_offset(yaml_parser_t *p);++unsigned char const * get_emitter_error(yaml_emitter_t *e);++int simple_document_start(yaml_event_t *e);++int get_event_type(yaml_event_t *e);++unsigned char * get_scalar_value(yaml_event_t *e);+unsigned long get_scalar_length(yaml_event_t *e);++unsigned char * get_scalar_tag(yaml_event_t *e);+unsigned long get_scalar_tag_len(yaml_event_t *e);++int get_scalar_style(yaml_event_t *e);++unsigned char * get_scalar_anchor(yaml_event_t *e);+unsigned char * get_sequence_start_anchor(yaml_event_t *e);+unsigned char * get_mapping_start_anchor(yaml_event_t *e);+unsigned char * get_alias_anchor(yaml_event_t *e);++#endif /* __HELPER_H__ */
libyaml/LICENSE view
@@ -1,19 +1,19 @@-Copyright (c) 2006 Kirill Simonov - -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. +Copyright (c) 2006 Kirill Simonov++Permission is hereby granted, free of charge, to any person obtaining a copy of+this software and associated documentation files (the "Software"), to deal in+the Software without restriction, including without limitation the rights to+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies+of the Software, and to permit persons to whom the Software is furnished to do+so, subject to the following conditions:++The above copyright notice and this permission notice shall be included in all+copies or substantial portions of the Software.++THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE+SOFTWARE.
libyaml/api.c view
@@ -1,1390 +1,1390 @@- -#include "yaml_private.h" - -/* - * Get the library version. - */ - -YAML_DECLARE(const char *) -yaml_get_version_string(void) -{ - return YAML_VERSION_STRING; -} - -/* - * Get the library version numbers. - */ - -YAML_DECLARE(void) -yaml_get_version(int *major, int *minor, int *patch) -{ - *major = YAML_VERSION_MAJOR; - *minor = YAML_VERSION_MINOR; - *patch = YAML_VERSION_PATCH; -} - -/* - * Allocate a dynamic memory block. - */ - -YAML_DECLARE(void *) -yaml_malloc(size_t size) -{ - return malloc(size ? size : 1); -} - -/* - * Reallocate a dynamic memory block. - */ - -YAML_DECLARE(void *) -yaml_realloc(void *ptr, size_t size) -{ - return ptr ? realloc(ptr, size ? size : 1) : malloc(size ? size : 1); -} - -/* - * Free a dynamic memory block. - */ - -YAML_DECLARE(void) -yaml_free(void *ptr) -{ - if (ptr) free(ptr); -} - -/* - * Duplicate a string. - */ - -YAML_DECLARE(yaml_char_t *) -yaml_strdup(const yaml_char_t *str) -{ - if (!str) - return NULL; - - return (yaml_char_t *)strdup((char *)str); -} - -/* - * Extend a string. - */ - -YAML_DECLARE(int) -yaml_string_extend(yaml_char_t **start, - yaml_char_t **pointer, yaml_char_t **end) -{ - yaml_char_t *new_start = yaml_realloc(*start, (*end - *start)*2); - - if (!new_start) return 0; - - memset(new_start + (*end - *start), 0, *end - *start); - - *pointer = new_start + (*pointer - *start); - *end = new_start + (*end - *start)*2; - *start = new_start; - - return 1; -} - -/* - * Append a string B to a string A. - */ - -YAML_DECLARE(int) -yaml_string_join( - yaml_char_t **a_start, yaml_char_t **a_pointer, yaml_char_t **a_end, - yaml_char_t **b_start, yaml_char_t **b_pointer, yaml_char_t **b_end) -{ - if (*b_start == *b_pointer) - return 1; - - while (*a_end - *a_pointer <= *b_pointer - *b_start) { - if (!yaml_string_extend(a_start, a_pointer, a_end)) - return 0; - } - - memcpy(*a_pointer, *b_start, *b_pointer - *b_start); - *a_pointer += *b_pointer - *b_start; - - return 1; -} - -/* - * Extend a stack. - */ - -YAML_DECLARE(int) -yaml_stack_extend(void **start, void **top, void **end) -{ - void *new_start = yaml_realloc(*start, ((char *)*end - (char *)*start)*2); - - if (!new_start) return 0; - - *top = (char *)new_start + ((char *)*top - (char *)*start); - *end = (char *)new_start + ((char *)*end - (char *)*start)*2; - *start = new_start; - - return 1; -} - -/* - * Extend or move a queue. - */ - -YAML_DECLARE(int) -yaml_queue_extend(void **start, void **head, void **tail, void **end) -{ - /* Check if we need to resize the queue. */ - - if (*start == *head && *tail == *end) { - void *new_start = yaml_realloc(*start, - ((char *)*end - (char *)*start)*2); - - if (!new_start) return 0; - - *head = (char *)new_start + ((char *)*head - (char *)*start); - *tail = (char *)new_start + ((char *)*tail - (char *)*start); - *end = (char *)new_start + ((char *)*end - (char *)*start)*2; - *start = new_start; - } - - /* Check if we need to move the queue at the beginning of the buffer. */ - - if (*tail == *end) { - if (*head != *tail) { - memmove(*start, *head, (char *)*tail - (char *)*head); - } - *tail = (char *)*tail - (char *)*head + (char *)*start; - *head = *start; - } - - return 1; -} - - -/* - * Create a new parser object. - */ - -YAML_DECLARE(int) -yaml_parser_initialize(yaml_parser_t *parser) -{ - assert(parser); /* Non-NULL parser object expected. */ - - memset(parser, 0, sizeof(yaml_parser_t)); - if (!BUFFER_INIT(parser, parser->raw_buffer, INPUT_RAW_BUFFER_SIZE)) - goto error; - if (!BUFFER_INIT(parser, parser->buffer, INPUT_BUFFER_SIZE)) - goto error; - if (!QUEUE_INIT(parser, parser->tokens, INITIAL_QUEUE_SIZE)) - goto error; - if (!STACK_INIT(parser, parser->indents, INITIAL_STACK_SIZE)) - goto error; - if (!STACK_INIT(parser, parser->simple_keys, INITIAL_STACK_SIZE)) - goto error; - if (!STACK_INIT(parser, parser->states, INITIAL_STACK_SIZE)) - goto error; - if (!STACK_INIT(parser, parser->marks, INITIAL_STACK_SIZE)) - goto error; - if (!STACK_INIT(parser, parser->tag_directives, INITIAL_STACK_SIZE)) - goto error; - - return 1; - -error: - - BUFFER_DEL(parser, parser->raw_buffer); - BUFFER_DEL(parser, parser->buffer); - QUEUE_DEL(parser, parser->tokens); - STACK_DEL(parser, parser->indents); - STACK_DEL(parser, parser->simple_keys); - STACK_DEL(parser, parser->states); - STACK_DEL(parser, parser->marks); - STACK_DEL(parser, parser->tag_directives); - - return 0; -} - -/* - * Destroy a parser object. - */ - -YAML_DECLARE(void) -yaml_parser_delete(yaml_parser_t *parser) -{ - assert(parser); /* Non-NULL parser object expected. */ - - BUFFER_DEL(parser, parser->raw_buffer); - BUFFER_DEL(parser, parser->buffer); - while (!QUEUE_EMPTY(parser, parser->tokens)) { - yaml_token_delete(&DEQUEUE(parser, parser->tokens)); - } - QUEUE_DEL(parser, parser->tokens); - STACK_DEL(parser, parser->indents); - STACK_DEL(parser, parser->simple_keys); - STACK_DEL(parser, parser->states); - STACK_DEL(parser, parser->marks); - while (!STACK_EMPTY(parser, parser->tag_directives)) { - yaml_tag_directive_t tag_directive = POP(parser, parser->tag_directives); - yaml_free(tag_directive.handle); - yaml_free(tag_directive.prefix); - } - STACK_DEL(parser, parser->tag_directives); - - memset(parser, 0, sizeof(yaml_parser_t)); -} - -/* - * String read handler. - */ - -static int -yaml_string_read_handler(void *data, unsigned char *buffer, size_t size, - size_t *size_read) -{ - yaml_parser_t *parser = data; - - if (parser->input.string.current == parser->input.string.end) { - *size_read = 0; - return 1; - } - - if (size > (size_t)(parser->input.string.end - - parser->input.string.current)) { - size = parser->input.string.end - parser->input.string.current; - } - - memcpy(buffer, parser->input.string.current, size); - parser->input.string.current += size; - *size_read = size; - return 1; -} - -/* - * File read handler. - */ - -static int -yaml_file_read_handler(void *data, unsigned char *buffer, size_t size, - size_t *size_read) -{ - yaml_parser_t *parser = data; - - *size_read = fread(buffer, 1, size, parser->input.file); - return !ferror(parser->input.file); -} - -/* - * Set a string input. - */ - -YAML_DECLARE(void) -yaml_parser_set_input_string(yaml_parser_t *parser, - const unsigned char *input, size_t size) -{ - assert(parser); /* Non-NULL parser object expected. */ - assert(!parser->read_handler); /* You can set the source only once. */ - assert(input); /* Non-NULL input string expected. */ - - parser->read_handler = yaml_string_read_handler; - parser->read_handler_data = parser; - - parser->input.string.start = input; - parser->input.string.current = input; - parser->input.string.end = input+size; -} - -/* - * Set a file input. - */ - -YAML_DECLARE(void) -yaml_parser_set_input_file(yaml_parser_t *parser, FILE *file) -{ - assert(parser); /* Non-NULL parser object expected. */ - assert(!parser->read_handler); /* You can set the source only once. */ - assert(file); /* Non-NULL file object expected. */ - - parser->read_handler = yaml_file_read_handler; - parser->read_handler_data = parser; - - parser->input.file = file; -} - -/* - * Set a generic input. - */ - -YAML_DECLARE(void) -yaml_parser_set_input(yaml_parser_t *parser, - yaml_read_handler_t *handler, void *data) -{ - assert(parser); /* Non-NULL parser object expected. */ - assert(!parser->read_handler); /* You can set the source only once. */ - assert(handler); /* Non-NULL read handler expected. */ - - parser->read_handler = handler; - parser->read_handler_data = data; -} - -/* - * Set the source encoding. - */ - -YAML_DECLARE(void) -yaml_parser_set_encoding(yaml_parser_t *parser, yaml_encoding_t encoding) -{ - assert(parser); /* Non-NULL parser object expected. */ - assert(!parser->encoding); /* Encoding is already set or detected. */ - - parser->encoding = encoding; -} - -/* - * Create a new emitter object. - */ - -YAML_DECLARE(int) -yaml_emitter_initialize(yaml_emitter_t *emitter) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - - memset(emitter, 0, sizeof(yaml_emitter_t)); - if (!BUFFER_INIT(emitter, emitter->buffer, OUTPUT_BUFFER_SIZE)) - goto error; - if (!BUFFER_INIT(emitter, emitter->raw_buffer, OUTPUT_RAW_BUFFER_SIZE)) - goto error; - if (!STACK_INIT(emitter, emitter->states, INITIAL_STACK_SIZE)) - goto error; - if (!QUEUE_INIT(emitter, emitter->events, INITIAL_QUEUE_SIZE)) - goto error; - if (!STACK_INIT(emitter, emitter->indents, INITIAL_STACK_SIZE)) - goto error; - if (!STACK_INIT(emitter, emitter->tag_directives, INITIAL_STACK_SIZE)) - goto error; - - return 1; - -error: - - BUFFER_DEL(emitter, emitter->buffer); - BUFFER_DEL(emitter, emitter->raw_buffer); - STACK_DEL(emitter, emitter->states); - QUEUE_DEL(emitter, emitter->events); - STACK_DEL(emitter, emitter->indents); - STACK_DEL(emitter, emitter->tag_directives); - - return 0; -} - -/* - * Destroy an emitter object. - */ - -YAML_DECLARE(void) -yaml_emitter_delete(yaml_emitter_t *emitter) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - - BUFFER_DEL(emitter, emitter->buffer); - BUFFER_DEL(emitter, emitter->raw_buffer); - STACK_DEL(emitter, emitter->states); - while (!QUEUE_EMPTY(emitter, emitter->events)) { - yaml_event_delete(&DEQUEUE(emitter, emitter->events)); - } - QUEUE_DEL(emitter, emitter->events); - STACK_DEL(emitter, emitter->indents); - while (!STACK_EMPTY(empty, emitter->tag_directives)) { - yaml_tag_directive_t tag_directive = POP(emitter, emitter->tag_directives); - yaml_free(tag_directive.handle); - yaml_free(tag_directive.prefix); - } - STACK_DEL(emitter, emitter->tag_directives); - yaml_free(emitter->anchors); - - memset(emitter, 0, sizeof(yaml_emitter_t)); -} - -/* - * String write handler. - */ - -static int -yaml_string_write_handler(void *data, unsigned char *buffer, size_t size) -{ - yaml_emitter_t *emitter = data; - - if (emitter->output.string.size + *emitter->output.string.size_written - < size) { - memcpy(emitter->output.string.buffer - + *emitter->output.string.size_written, - buffer, - emitter->output.string.size - - *emitter->output.string.size_written); - *emitter->output.string.size_written = emitter->output.string.size; - return 0; - } - - memcpy(emitter->output.string.buffer - + *emitter->output.string.size_written, buffer, size); - *emitter->output.string.size_written += size; - return 1; -} - -/* - * File write handler. - */ - -static int -yaml_file_write_handler(void *data, unsigned char *buffer, size_t size) -{ - yaml_emitter_t *emitter = data; - - return (fwrite(buffer, 1, size, emitter->output.file) == size); -} -/* - * Set a string output. - */ - -YAML_DECLARE(void) -yaml_emitter_set_output_string(yaml_emitter_t *emitter, - unsigned char *output, size_t size, size_t *size_written) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - assert(!emitter->write_handler); /* You can set the output only once. */ - assert(output); /* Non-NULL output string expected. */ - - emitter->write_handler = yaml_string_write_handler; - emitter->write_handler_data = emitter; - - emitter->output.string.buffer = output; - emitter->output.string.size = size; - emitter->output.string.size_written = size_written; - *size_written = 0; -} - -/* - * Set a file output. - */ - -YAML_DECLARE(void) -yaml_emitter_set_output_file(yaml_emitter_t *emitter, FILE *file) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - assert(!emitter->write_handler); /* You can set the output only once. */ - assert(file); /* Non-NULL file object expected. */ - - emitter->write_handler = yaml_file_write_handler; - emitter->write_handler_data = emitter; - - emitter->output.file = file; -} - -/* - * Set a generic output handler. - */ - -YAML_DECLARE(void) -yaml_emitter_set_output(yaml_emitter_t *emitter, - yaml_write_handler_t *handler, void *data) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - assert(!emitter->write_handler); /* You can set the output only once. */ - assert(handler); /* Non-NULL handler object expected. */ - - emitter->write_handler = handler; - emitter->write_handler_data = data; -} - -/* - * Set the output encoding. - */ - -YAML_DECLARE(void) -yaml_emitter_set_encoding(yaml_emitter_t *emitter, yaml_encoding_t encoding) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - assert(!emitter->encoding); /* You can set encoding only once. */ - - emitter->encoding = encoding; -} - -/* - * Set the canonical output style. - */ - -YAML_DECLARE(void) -yaml_emitter_set_canonical(yaml_emitter_t *emitter, int canonical) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - - emitter->canonical = (canonical != 0); -} - -/* - * Set the indentation increment. - */ - -YAML_DECLARE(void) -yaml_emitter_set_indent(yaml_emitter_t *emitter, int indent) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - - emitter->best_indent = (1 < indent && indent < 10) ? indent : 2; -} - -/* - * Set the preferred line width. - */ - -YAML_DECLARE(void) -yaml_emitter_set_width(yaml_emitter_t *emitter, int width) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - - emitter->best_width = (width >= 0) ? width : -1; -} - -/* - * Set if unescaped non-ASCII characters are allowed. - */ - -YAML_DECLARE(void) -yaml_emitter_set_unicode(yaml_emitter_t *emitter, int unicode) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - - emitter->unicode = (unicode != 0); -} - -/* - * Set the preferred line break character. - */ - -YAML_DECLARE(void) -yaml_emitter_set_break(yaml_emitter_t *emitter, yaml_break_t line_break) -{ - assert(emitter); /* Non-NULL emitter object expected. */ - - emitter->line_break = line_break; -} - -/* - * Destroy a token object. - */ - -YAML_DECLARE(void) -yaml_token_delete(yaml_token_t *token) -{ - assert(token); /* Non-NULL token object expected. */ - - switch (token->type) - { - case YAML_TAG_DIRECTIVE_TOKEN: - yaml_free(token->data.tag_directive.handle); - yaml_free(token->data.tag_directive.prefix); - break; - - case YAML_ALIAS_TOKEN: - yaml_free(token->data.alias.value); - break; - - case YAML_ANCHOR_TOKEN: - yaml_free(token->data.anchor.value); - break; - - case YAML_TAG_TOKEN: - yaml_free(token->data.tag.handle); - yaml_free(token->data.tag.suffix); - break; - - case YAML_SCALAR_TOKEN: - yaml_free(token->data.scalar.value); - break; - - default: - break; - } - - memset(token, 0, sizeof(yaml_token_t)); -} - -/* - * Check if a string is a valid UTF-8 sequence. - * - * Check 'reader.c' for more details on UTF-8 encoding. - */ - -static int -yaml_check_utf8(yaml_char_t *start, size_t length) -{ - yaml_char_t *end = start+length; - yaml_char_t *pointer = start; - - while (pointer < end) { - unsigned char octet; - unsigned int width; - unsigned int value; - size_t k; - - octet = pointer[0]; - width = (octet & 0x80) == 0x00 ? 1 : - (octet & 0xE0) == 0xC0 ? 2 : - (octet & 0xF0) == 0xE0 ? 3 : - (octet & 0xF8) == 0xF0 ? 4 : 0; - value = (octet & 0x80) == 0x00 ? octet & 0x7F : - (octet & 0xE0) == 0xC0 ? octet & 0x1F : - (octet & 0xF0) == 0xE0 ? octet & 0x0F : - (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0; - if (!width) return 0; - if (pointer+width > end) return 0; - for (k = 1; k < width; k ++) { - octet = pointer[k]; - if ((octet & 0xC0) != 0x80) return 0; - value = (value << 6) + (octet & 0x3F); - } - if (!((width == 1) || - (width == 2 && value >= 0x80) || - (width == 3 && value >= 0x800) || - (width == 4 && value >= 0x10000))) return 0; - - pointer += width; - } - - return 1; -} - -/* - * Create STREAM-START. - */ - -YAML_DECLARE(int) -yaml_stream_start_event_initialize(yaml_event_t *event, - yaml_encoding_t encoding) -{ - yaml_mark_t mark = { 0, 0, 0 }; - - assert(event); /* Non-NULL event object is expected. */ - - STREAM_START_EVENT_INIT(*event, encoding, mark, mark); - - return 1; -} - -/* - * Create STREAM-END. - */ - -YAML_DECLARE(int) -yaml_stream_end_event_initialize(yaml_event_t *event) -{ - yaml_mark_t mark = { 0, 0, 0 }; - - assert(event); /* Non-NULL event object is expected. */ - - STREAM_END_EVENT_INIT(*event, mark, mark); - - return 1; -} - -/* - * Create DOCUMENT-START. - */ - -YAML_DECLARE(int) -yaml_document_start_event_initialize(yaml_event_t *event, - yaml_version_directive_t *version_directive, - yaml_tag_directive_t *tag_directives_start, - yaml_tag_directive_t *tag_directives_end, - int implicit) -{ - struct { - yaml_error_type_t error; - } context; - yaml_mark_t mark = { 0, 0, 0 }; - yaml_version_directive_t *version_directive_copy = NULL; - struct { - yaml_tag_directive_t *start; - yaml_tag_directive_t *end; - yaml_tag_directive_t *top; - } tag_directives_copy = { NULL, NULL, NULL }; - yaml_tag_directive_t value = { NULL, NULL }; - - assert(event); /* Non-NULL event object is expected. */ - assert((tag_directives_start && tag_directives_end) || - (tag_directives_start == tag_directives_end)); - /* Valid tag directives are expected. */ - - if (version_directive) { - version_directive_copy = yaml_malloc(sizeof(yaml_version_directive_t)); - if (!version_directive_copy) goto error; - version_directive_copy->major = version_directive->major; - version_directive_copy->minor = version_directive->minor; - } - - if (tag_directives_start != tag_directives_end) { - yaml_tag_directive_t *tag_directive; - if (!STACK_INIT(&context, tag_directives_copy, INITIAL_STACK_SIZE)) - goto error; - for (tag_directive = tag_directives_start; - tag_directive != tag_directives_end; tag_directive ++) { - assert(tag_directive->handle); - assert(tag_directive->prefix); - if (!yaml_check_utf8(tag_directive->handle, - strlen((char *)tag_directive->handle))) - goto error; - if (!yaml_check_utf8(tag_directive->prefix, - strlen((char *)tag_directive->prefix))) - goto error; - value.handle = yaml_strdup(tag_directive->handle); - value.prefix = yaml_strdup(tag_directive->prefix); - if (!value.handle || !value.prefix) goto error; - if (!PUSH(&context, tag_directives_copy, value)) - goto error; - value.handle = NULL; - value.prefix = NULL; - } - } - - DOCUMENT_START_EVENT_INIT(*event, version_directive_copy, - tag_directives_copy.start, tag_directives_copy.top, - implicit, mark, mark); - - return 1; - -error: - yaml_free(version_directive_copy); - while (!STACK_EMPTY(context, tag_directives_copy)) { - yaml_tag_directive_t value = POP(context, tag_directives_copy); - yaml_free(value.handle); - yaml_free(value.prefix); - } - STACK_DEL(context, tag_directives_copy); - yaml_free(value.handle); - yaml_free(value.prefix); - - return 0; -} - -/* - * Create DOCUMENT-END. - */ - -YAML_DECLARE(int) -yaml_document_end_event_initialize(yaml_event_t *event, int implicit) -{ - yaml_mark_t mark = { 0, 0, 0 }; - - assert(event); /* Non-NULL emitter object is expected. */ - - DOCUMENT_END_EVENT_INIT(*event, implicit, mark, mark); - - return 1; -} - -/* - * Create ALIAS. - */ - -YAML_DECLARE(int) -yaml_alias_event_initialize(yaml_event_t *event, yaml_char_t *anchor) -{ - yaml_mark_t mark = { 0, 0, 0 }; - yaml_char_t *anchor_copy = NULL; - - assert(event); /* Non-NULL event object is expected. */ - assert(anchor); /* Non-NULL anchor is expected. */ - - if (!yaml_check_utf8(anchor, strlen((char *)anchor))) return 0; - - anchor_copy = yaml_strdup(anchor); - if (!anchor_copy) - return 0; - - ALIAS_EVENT_INIT(*event, anchor_copy, mark, mark); - - return 1; -} - -/* - * Create SCALAR. - */ - -YAML_DECLARE(int) -yaml_scalar_event_initialize(yaml_event_t *event, - yaml_char_t *anchor, yaml_char_t *tag, - yaml_char_t *value, int length, - int plain_implicit, int quoted_implicit, - yaml_scalar_style_t style) -{ - yaml_mark_t mark = { 0, 0, 0 }; - yaml_char_t *anchor_copy = NULL; - yaml_char_t *tag_copy = NULL; - yaml_char_t *value_copy = NULL; - - assert(event); /* Non-NULL event object is expected. */ - /* following line added for Haskell yaml library */ - if (!value && !length) value = ""; - assert(value); /* Non-NULL anchor is expected. */ - - if (anchor) { - if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error; - anchor_copy = yaml_strdup(anchor); - if (!anchor_copy) goto error; - } - - if (tag) { - if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error; - tag_copy = yaml_strdup(tag); - if (!tag_copy) goto error; - } - - if (length < 0) { - length = strlen((char *)value); - } - - if (!yaml_check_utf8(value, length)) goto error; - value_copy = yaml_malloc(length+1); - if (!value_copy) goto error; - memcpy(value_copy, value, length); - value_copy[length] = '\0'; - - SCALAR_EVENT_INIT(*event, anchor_copy, tag_copy, value_copy, length, - plain_implicit, quoted_implicit, style, mark, mark); - - return 1; - -error: - yaml_free(anchor_copy); - yaml_free(tag_copy); - yaml_free(value_copy); - - return 0; -} - -/* - * Create SEQUENCE-START. - */ - -YAML_DECLARE(int) -yaml_sequence_start_event_initialize(yaml_event_t *event, - yaml_char_t *anchor, yaml_char_t *tag, int implicit, - yaml_sequence_style_t style) -{ - yaml_mark_t mark = { 0, 0, 0 }; - yaml_char_t *anchor_copy = NULL; - yaml_char_t *tag_copy = NULL; - - assert(event); /* Non-NULL event object is expected. */ - - if (anchor) { - if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error; - anchor_copy = yaml_strdup(anchor); - if (!anchor_copy) goto error; - } - - if (tag) { - if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error; - tag_copy = yaml_strdup(tag); - if (!tag_copy) goto error; - } - - SEQUENCE_START_EVENT_INIT(*event, anchor_copy, tag_copy, - implicit, style, mark, mark); - - return 1; - -error: - yaml_free(anchor_copy); - yaml_free(tag_copy); - - return 0; -} - -/* - * Create SEQUENCE-END. - */ - -YAML_DECLARE(int) -yaml_sequence_end_event_initialize(yaml_event_t *event) -{ - yaml_mark_t mark = { 0, 0, 0 }; - - assert(event); /* Non-NULL event object is expected. */ - - SEQUENCE_END_EVENT_INIT(*event, mark, mark); - - return 1; -} - -/* - * Create MAPPING-START. - */ - -YAML_DECLARE(int) -yaml_mapping_start_event_initialize(yaml_event_t *event, - yaml_char_t *anchor, yaml_char_t *tag, int implicit, - yaml_mapping_style_t style) -{ - yaml_mark_t mark = { 0, 0, 0 }; - yaml_char_t *anchor_copy = NULL; - yaml_char_t *tag_copy = NULL; - - assert(event); /* Non-NULL event object is expected. */ - - if (anchor) { - if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error; - anchor_copy = yaml_strdup(anchor); - if (!anchor_copy) goto error; - } - - if (tag) { - if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error; - tag_copy = yaml_strdup(tag); - if (!tag_copy) goto error; - } - - MAPPING_START_EVENT_INIT(*event, anchor_copy, tag_copy, - implicit, style, mark, mark); - - return 1; - -error: - yaml_free(anchor_copy); - yaml_free(tag_copy); - - return 0; -} - -/* - * Create MAPPING-END. - */ - -YAML_DECLARE(int) -yaml_mapping_end_event_initialize(yaml_event_t *event) -{ - yaml_mark_t mark = { 0, 0, 0 }; - - assert(event); /* Non-NULL event object is expected. */ - - MAPPING_END_EVENT_INIT(*event, mark, mark); - - return 1; -} - -/* - * Destroy an event object. - */ - -YAML_DECLARE(void) -yaml_event_delete(yaml_event_t *event) -{ - yaml_tag_directive_t *tag_directive; - - assert(event); /* Non-NULL event object expected. */ - - switch (event->type) - { - case YAML_DOCUMENT_START_EVENT: - yaml_free(event->data.document_start.version_directive); - for (tag_directive = event->data.document_start.tag_directives.start; - tag_directive != event->data.document_start.tag_directives.end; - tag_directive++) { - yaml_free(tag_directive->handle); - yaml_free(tag_directive->prefix); - } - yaml_free(event->data.document_start.tag_directives.start); - break; - - case YAML_ALIAS_EVENT: - yaml_free(event->data.alias.anchor); - break; - - case YAML_SCALAR_EVENT: - yaml_free(event->data.scalar.anchor); - yaml_free(event->data.scalar.tag); - yaml_free(event->data.scalar.value); - break; - - case YAML_SEQUENCE_START_EVENT: - yaml_free(event->data.sequence_start.anchor); - yaml_free(event->data.sequence_start.tag); - break; - - case YAML_MAPPING_START_EVENT: - yaml_free(event->data.mapping_start.anchor); - yaml_free(event->data.mapping_start.tag); - break; - - default: - break; - } - - memset(event, 0, sizeof(yaml_event_t)); -} - -/* - * Create a document object. - */ - -YAML_DECLARE(int) -yaml_document_initialize(yaml_document_t *document, - yaml_version_directive_t *version_directive, - yaml_tag_directive_t *tag_directives_start, - yaml_tag_directive_t *tag_directives_end, - int start_implicit, int end_implicit) -{ - struct { - yaml_error_type_t error; - } context; - struct { - yaml_node_t *start; - yaml_node_t *end; - yaml_node_t *top; - } nodes = { NULL, NULL, NULL }; - yaml_version_directive_t *version_directive_copy = NULL; - struct { - yaml_tag_directive_t *start; - yaml_tag_directive_t *end; - yaml_tag_directive_t *top; - } tag_directives_copy = { NULL, NULL, NULL }; - yaml_tag_directive_t value = { NULL, NULL }; - yaml_mark_t mark = { 0, 0, 0 }; - - assert(document); /* Non-NULL document object is expected. */ - assert((tag_directives_start && tag_directives_end) || - (tag_directives_start == tag_directives_end)); - /* Valid tag directives are expected. */ - - if (!STACK_INIT(&context, nodes, INITIAL_STACK_SIZE)) goto error; - - if (version_directive) { - version_directive_copy = yaml_malloc(sizeof(yaml_version_directive_t)); - if (!version_directive_copy) goto error; - version_directive_copy->major = version_directive->major; - version_directive_copy->minor = version_directive->minor; - } - - if (tag_directives_start != tag_directives_end) { - yaml_tag_directive_t *tag_directive; - if (!STACK_INIT(&context, tag_directives_copy, INITIAL_STACK_SIZE)) - goto error; - for (tag_directive = tag_directives_start; - tag_directive != tag_directives_end; tag_directive ++) { - assert(tag_directive->handle); - assert(tag_directive->prefix); - if (!yaml_check_utf8(tag_directive->handle, - strlen((char *)tag_directive->handle))) - goto error; - if (!yaml_check_utf8(tag_directive->prefix, - strlen((char *)tag_directive->prefix))) - goto error; - value.handle = yaml_strdup(tag_directive->handle); - value.prefix = yaml_strdup(tag_directive->prefix); - if (!value.handle || !value.prefix) goto error; - if (!PUSH(&context, tag_directives_copy, value)) - goto error; - value.handle = NULL; - value.prefix = NULL; - } - } - - DOCUMENT_INIT(*document, nodes.start, nodes.end, version_directive_copy, - tag_directives_copy.start, tag_directives_copy.top, - start_implicit, end_implicit, mark, mark); - - return 1; - -error: - STACK_DEL(&context, nodes); - yaml_free(version_directive_copy); - while (!STACK_EMPTY(&context, tag_directives_copy)) { - yaml_tag_directive_t value = POP(&context, tag_directives_copy); - yaml_free(value.handle); - yaml_free(value.prefix); - } - STACK_DEL(&context, tag_directives_copy); - yaml_free(value.handle); - yaml_free(value.prefix); - - return 0; -} - -/* - * Destroy a document object. - */ - -YAML_DECLARE(void) -yaml_document_delete(yaml_document_t *document) -{ - struct { - yaml_error_type_t error; - } context; - yaml_tag_directive_t *tag_directive; - - context.error = YAML_NO_ERROR; /* Eliminate a compliler warning. */ - - assert(document); /* Non-NULL document object is expected. */ - - while (!STACK_EMPTY(&context, document->nodes)) { - yaml_node_t node = POP(&context, document->nodes); - yaml_free(node.tag); - switch (node.type) { - case YAML_SCALAR_NODE: - yaml_free(node.data.scalar.value); - break; - case YAML_SEQUENCE_NODE: - STACK_DEL(&context, node.data.sequence.items); - break; - case YAML_MAPPING_NODE: - STACK_DEL(&context, node.data.mapping.pairs); - break; - default: - assert(0); /* Should not happen. */ - } - } - STACK_DEL(&context, document->nodes); - - yaml_free(document->version_directive); - for (tag_directive = document->tag_directives.start; - tag_directive != document->tag_directives.end; - tag_directive++) { - yaml_free(tag_directive->handle); - yaml_free(tag_directive->prefix); - } - yaml_free(document->tag_directives.start); - - memset(document, 0, sizeof(yaml_document_t)); -} - -/** - * Get a document node. - */ - -YAML_DECLARE(yaml_node_t *) -yaml_document_get_node(yaml_document_t *document, int index) -{ - assert(document); /* Non-NULL document object is expected. */ - - if (index > 0 && document->nodes.start + index <= document->nodes.top) { - return document->nodes.start + index - 1; - } - return NULL; -} - -/** - * Get the root object. - */ - -YAML_DECLARE(yaml_node_t *) -yaml_document_get_root_node(yaml_document_t *document) -{ - assert(document); /* Non-NULL document object is expected. */ - - if (document->nodes.top != document->nodes.start) { - return document->nodes.start; - } - return NULL; -} - -/* - * Add a scalar node to a document. - */ - -YAML_DECLARE(int) -yaml_document_add_scalar(yaml_document_t *document, - yaml_char_t *tag, yaml_char_t *value, int length, - yaml_scalar_style_t style) -{ - struct { - yaml_error_type_t error; - } context; - yaml_mark_t mark = { 0, 0, 0 }; - yaml_char_t *tag_copy = NULL; - yaml_char_t *value_copy = NULL; - yaml_node_t node; - - assert(document); /* Non-NULL document object is expected. */ - assert(value); /* Non-NULL value is expected. */ - - if (!tag) { - tag = (yaml_char_t *)YAML_DEFAULT_SCALAR_TAG; - } - - if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error; - tag_copy = yaml_strdup(tag); - if (!tag_copy) goto error; - - if (length < 0) { - length = strlen((char *)value); - } - - if (!yaml_check_utf8(value, length)) goto error; - value_copy = yaml_malloc(length+1); - if (!value_copy) goto error; - memcpy(value_copy, value, length); - value_copy[length] = '\0'; - - SCALAR_NODE_INIT(node, tag_copy, value_copy, length, style, mark, mark); - if (!PUSH(&context, document->nodes, node)) goto error; - - return document->nodes.top - document->nodes.start; - -error: - yaml_free(tag_copy); - yaml_free(value_copy); - - return 0; -} - -/* - * Add a sequence node to a document. - */ - -YAML_DECLARE(int) -yaml_document_add_sequence(yaml_document_t *document, - yaml_char_t *tag, yaml_sequence_style_t style) -{ - struct { - yaml_error_type_t error; - } context; - yaml_mark_t mark = { 0, 0, 0 }; - yaml_char_t *tag_copy = NULL; - struct { - yaml_node_item_t *start; - yaml_node_item_t *end; - yaml_node_item_t *top; - } items = { NULL, NULL, NULL }; - yaml_node_t node; - - assert(document); /* Non-NULL document object is expected. */ - - if (!tag) { - tag = (yaml_char_t *)YAML_DEFAULT_SEQUENCE_TAG; - } - - if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error; - tag_copy = yaml_strdup(tag); - if (!tag_copy) goto error; - - if (!STACK_INIT(&context, items, INITIAL_STACK_SIZE)) goto error; - - SEQUENCE_NODE_INIT(node, tag_copy, items.start, items.end, - style, mark, mark); - if (!PUSH(&context, document->nodes, node)) goto error; - - return document->nodes.top - document->nodes.start; - -error: - STACK_DEL(&context, items); - yaml_free(tag_copy); - - return 0; -} - -/* - * Add a mapping node to a document. - */ - -YAML_DECLARE(int) -yaml_document_add_mapping(yaml_document_t *document, - yaml_char_t *tag, yaml_mapping_style_t style) -{ - struct { - yaml_error_type_t error; - } context; - yaml_mark_t mark = { 0, 0, 0 }; - yaml_char_t *tag_copy = NULL; - struct { - yaml_node_pair_t *start; - yaml_node_pair_t *end; - yaml_node_pair_t *top; - } pairs = { NULL, NULL, NULL }; - yaml_node_t node; - - assert(document); /* Non-NULL document object is expected. */ - - if (!tag) { - tag = (yaml_char_t *)YAML_DEFAULT_MAPPING_TAG; - } - - if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error; - tag_copy = yaml_strdup(tag); - if (!tag_copy) goto error; - - if (!STACK_INIT(&context, pairs, INITIAL_STACK_SIZE)) goto error; - - MAPPING_NODE_INIT(node, tag_copy, pairs.start, pairs.end, - style, mark, mark); - if (!PUSH(&context, document->nodes, node)) goto error; - - return document->nodes.top - document->nodes.start; - -error: - STACK_DEL(&context, pairs); - yaml_free(tag_copy); - - return 0; -} - -/* - * Append an item to a sequence node. - */ - -YAML_DECLARE(int) -yaml_document_append_sequence_item(yaml_document_t *document, - int sequence, int item) -{ - struct { - yaml_error_type_t error; - } context; - - assert(document); /* Non-NULL document is required. */ - assert(sequence > 0 - && document->nodes.start + sequence <= document->nodes.top); - /* Valid sequence id is required. */ - assert(document->nodes.start[sequence-1].type == YAML_SEQUENCE_NODE); - /* A sequence node is required. */ - assert(item > 0 && document->nodes.start + item <= document->nodes.top); - /* Valid item id is required. */ - - if (!PUSH(&context, - document->nodes.start[sequence-1].data.sequence.items, item)) - return 0; - - return 1; -} - -/* - * Append a pair of a key and a value to a mapping node. - */ - -YAML_DECLARE(int) -yaml_document_append_mapping_pair(yaml_document_t *document, - int mapping, int key, int value) -{ - struct { - yaml_error_type_t error; - } context; - yaml_node_pair_t pair = { key, value }; - - assert(document); /* Non-NULL document is required. */ - assert(mapping > 0 - && document->nodes.start + mapping <= document->nodes.top); - /* Valid mapping id is required. */ - assert(document->nodes.start[mapping-1].type == YAML_MAPPING_NODE); - /* A mapping node is required. */ - assert(key > 0 && document->nodes.start + key <= document->nodes.top); - /* Valid key id is required. */ - assert(value > 0 && document->nodes.start + value <= document->nodes.top); - /* Valid value id is required. */ - - if (!PUSH(&context, - document->nodes.start[mapping-1].data.mapping.pairs, pair)) - return 0; - - return 1; -} - - ++#include "yaml_private.h"++/*+ * Get the library version.+ */++YAML_DECLARE(const char *)+yaml_get_version_string(void)+{+ return YAML_VERSION_STRING;+}++/*+ * Get the library version numbers.+ */++YAML_DECLARE(void)+yaml_get_version(int *major, int *minor, int *patch)+{+ *major = YAML_VERSION_MAJOR;+ *minor = YAML_VERSION_MINOR;+ *patch = YAML_VERSION_PATCH;+}++/*+ * Allocate a dynamic memory block.+ */++YAML_DECLARE(void *)+yaml_malloc(size_t size)+{+ return malloc(size ? size : 1);+}++/*+ * Reallocate a dynamic memory block.+ */++YAML_DECLARE(void *)+yaml_realloc(void *ptr, size_t size)+{+ return ptr ? realloc(ptr, size ? size : 1) : malloc(size ? size : 1);+}++/*+ * Free a dynamic memory block.+ */++YAML_DECLARE(void)+yaml_free(void *ptr)+{+ if (ptr) free(ptr);+}++/*+ * Duplicate a string.+ */++YAML_DECLARE(yaml_char_t *)+yaml_strdup(const yaml_char_t *str)+{+ if (!str)+ return NULL;++ return (yaml_char_t *)strdup((char *)str);+}++/*+ * Extend a string.+ */++YAML_DECLARE(int)+yaml_string_extend(yaml_char_t **start,+ yaml_char_t **pointer, yaml_char_t **end)+{+ yaml_char_t *new_start = yaml_realloc(*start, (*end - *start)*2);++ if (!new_start) return 0;++ memset(new_start + (*end - *start), 0, *end - *start);++ *pointer = new_start + (*pointer - *start);+ *end = new_start + (*end - *start)*2;+ *start = new_start;++ return 1;+}++/*+ * Append a string B to a string A.+ */++YAML_DECLARE(int)+yaml_string_join(+ yaml_char_t **a_start, yaml_char_t **a_pointer, yaml_char_t **a_end,+ yaml_char_t **b_start, yaml_char_t **b_pointer, yaml_char_t **b_end)+{+ if (*b_start == *b_pointer)+ return 1;++ while (*a_end - *a_pointer <= *b_pointer - *b_start) {+ if (!yaml_string_extend(a_start, a_pointer, a_end))+ return 0;+ }++ memcpy(*a_pointer, *b_start, *b_pointer - *b_start);+ *a_pointer += *b_pointer - *b_start;++ return 1;+}++/*+ * Extend a stack.+ */++YAML_DECLARE(int)+yaml_stack_extend(void **start, void **top, void **end)+{+ void *new_start = yaml_realloc(*start, ((char *)*end - (char *)*start)*2);++ if (!new_start) return 0;++ *top = (char *)new_start + ((char *)*top - (char *)*start);+ *end = (char *)new_start + ((char *)*end - (char *)*start)*2;+ *start = new_start;++ return 1;+}++/*+ * Extend or move a queue.+ */++YAML_DECLARE(int)+yaml_queue_extend(void **start, void **head, void **tail, void **end)+{+ /* Check if we need to resize the queue. */++ if (*start == *head && *tail == *end) {+ void *new_start = yaml_realloc(*start,+ ((char *)*end - (char *)*start)*2);++ if (!new_start) return 0;++ *head = (char *)new_start + ((char *)*head - (char *)*start);+ *tail = (char *)new_start + ((char *)*tail - (char *)*start);+ *end = (char *)new_start + ((char *)*end - (char *)*start)*2;+ *start = new_start;+ }++ /* Check if we need to move the queue at the beginning of the buffer. */++ if (*tail == *end) {+ if (*head != *tail) {+ memmove(*start, *head, (char *)*tail - (char *)*head);+ }+ *tail = (char *)*tail - (char *)*head + (char *)*start;+ *head = *start;+ }++ return 1;+}+++/*+ * Create a new parser object.+ */++YAML_DECLARE(int)+yaml_parser_initialize(yaml_parser_t *parser)+{+ assert(parser); /* Non-NULL parser object expected. */++ memset(parser, 0, sizeof(yaml_parser_t));+ if (!BUFFER_INIT(parser, parser->raw_buffer, INPUT_RAW_BUFFER_SIZE))+ goto error;+ if (!BUFFER_INIT(parser, parser->buffer, INPUT_BUFFER_SIZE))+ goto error;+ if (!QUEUE_INIT(parser, parser->tokens, INITIAL_QUEUE_SIZE))+ goto error;+ if (!STACK_INIT(parser, parser->indents, INITIAL_STACK_SIZE))+ goto error;+ if (!STACK_INIT(parser, parser->simple_keys, INITIAL_STACK_SIZE))+ goto error;+ if (!STACK_INIT(parser, parser->states, INITIAL_STACK_SIZE))+ goto error;+ if (!STACK_INIT(parser, parser->marks, INITIAL_STACK_SIZE))+ goto error;+ if (!STACK_INIT(parser, parser->tag_directives, INITIAL_STACK_SIZE))+ goto error;++ return 1;++error:++ BUFFER_DEL(parser, parser->raw_buffer);+ BUFFER_DEL(parser, parser->buffer);+ QUEUE_DEL(parser, parser->tokens);+ STACK_DEL(parser, parser->indents);+ STACK_DEL(parser, parser->simple_keys);+ STACK_DEL(parser, parser->states);+ STACK_DEL(parser, parser->marks);+ STACK_DEL(parser, parser->tag_directives);++ return 0;+}++/*+ * Destroy a parser object.+ */++YAML_DECLARE(void)+yaml_parser_delete(yaml_parser_t *parser)+{+ assert(parser); /* Non-NULL parser object expected. */++ BUFFER_DEL(parser, parser->raw_buffer);+ BUFFER_DEL(parser, parser->buffer);+ while (!QUEUE_EMPTY(parser, parser->tokens)) {+ yaml_token_delete(&DEQUEUE(parser, parser->tokens));+ }+ QUEUE_DEL(parser, parser->tokens);+ STACK_DEL(parser, parser->indents);+ STACK_DEL(parser, parser->simple_keys);+ STACK_DEL(parser, parser->states);+ STACK_DEL(parser, parser->marks);+ while (!STACK_EMPTY(parser, parser->tag_directives)) {+ yaml_tag_directive_t tag_directive = POP(parser, parser->tag_directives);+ yaml_free(tag_directive.handle);+ yaml_free(tag_directive.prefix);+ }+ STACK_DEL(parser, parser->tag_directives);++ memset(parser, 0, sizeof(yaml_parser_t));+}++/*+ * String read handler.+ */++static int+yaml_string_read_handler(void *data, unsigned char *buffer, size_t size,+ size_t *size_read)+{+ yaml_parser_t *parser = data;++ if (parser->input.string.current == parser->input.string.end) {+ *size_read = 0;+ return 1;+ }++ if (size > (size_t)(parser->input.string.end+ - parser->input.string.current)) {+ size = parser->input.string.end - parser->input.string.current;+ }++ memcpy(buffer, parser->input.string.current, size);+ parser->input.string.current += size;+ *size_read = size;+ return 1;+}++/*+ * File read handler.+ */++static int+yaml_file_read_handler(void *data, unsigned char *buffer, size_t size,+ size_t *size_read)+{+ yaml_parser_t *parser = data;++ *size_read = fread(buffer, 1, size, parser->input.file);+ return !ferror(parser->input.file);+}++/*+ * Set a string input.+ */++YAML_DECLARE(void)+yaml_parser_set_input_string(yaml_parser_t *parser,+ const unsigned char *input, size_t size)+{+ assert(parser); /* Non-NULL parser object expected. */+ assert(!parser->read_handler); /* You can set the source only once. */+ assert(input); /* Non-NULL input string expected. */++ parser->read_handler = yaml_string_read_handler;+ parser->read_handler_data = parser;++ parser->input.string.start = input;+ parser->input.string.current = input;+ parser->input.string.end = input+size;+}++/*+ * Set a file input.+ */++YAML_DECLARE(void)+yaml_parser_set_input_file(yaml_parser_t *parser, FILE *file)+{+ assert(parser); /* Non-NULL parser object expected. */+ assert(!parser->read_handler); /* You can set the source only once. */+ assert(file); /* Non-NULL file object expected. */++ parser->read_handler = yaml_file_read_handler;+ parser->read_handler_data = parser;++ parser->input.file = file;+}++/*+ * Set a generic input.+ */++YAML_DECLARE(void)+yaml_parser_set_input(yaml_parser_t *parser,+ yaml_read_handler_t *handler, void *data)+{+ assert(parser); /* Non-NULL parser object expected. */+ assert(!parser->read_handler); /* You can set the source only once. */+ assert(handler); /* Non-NULL read handler expected. */++ parser->read_handler = handler;+ parser->read_handler_data = data;+}++/*+ * Set the source encoding.+ */++YAML_DECLARE(void)+yaml_parser_set_encoding(yaml_parser_t *parser, yaml_encoding_t encoding)+{+ assert(parser); /* Non-NULL parser object expected. */+ assert(!parser->encoding); /* Encoding is already set or detected. */++ parser->encoding = encoding;+}++/*+ * Create a new emitter object.+ */++YAML_DECLARE(int)+yaml_emitter_initialize(yaml_emitter_t *emitter)+{+ assert(emitter); /* Non-NULL emitter object expected. */++ memset(emitter, 0, sizeof(yaml_emitter_t));+ if (!BUFFER_INIT(emitter, emitter->buffer, OUTPUT_BUFFER_SIZE))+ goto error;+ if (!BUFFER_INIT(emitter, emitter->raw_buffer, OUTPUT_RAW_BUFFER_SIZE))+ goto error;+ if (!STACK_INIT(emitter, emitter->states, INITIAL_STACK_SIZE))+ goto error;+ if (!QUEUE_INIT(emitter, emitter->events, INITIAL_QUEUE_SIZE))+ goto error;+ if (!STACK_INIT(emitter, emitter->indents, INITIAL_STACK_SIZE))+ goto error;+ if (!STACK_INIT(emitter, emitter->tag_directives, INITIAL_STACK_SIZE))+ goto error;++ return 1;++error:++ BUFFER_DEL(emitter, emitter->buffer);+ BUFFER_DEL(emitter, emitter->raw_buffer);+ STACK_DEL(emitter, emitter->states);+ QUEUE_DEL(emitter, emitter->events);+ STACK_DEL(emitter, emitter->indents);+ STACK_DEL(emitter, emitter->tag_directives);++ return 0;+}++/*+ * Destroy an emitter object.+ */++YAML_DECLARE(void)+yaml_emitter_delete(yaml_emitter_t *emitter)+{+ assert(emitter); /* Non-NULL emitter object expected. */++ BUFFER_DEL(emitter, emitter->buffer);+ BUFFER_DEL(emitter, emitter->raw_buffer);+ STACK_DEL(emitter, emitter->states);+ while (!QUEUE_EMPTY(emitter, emitter->events)) {+ yaml_event_delete(&DEQUEUE(emitter, emitter->events));+ }+ QUEUE_DEL(emitter, emitter->events);+ STACK_DEL(emitter, emitter->indents);+ while (!STACK_EMPTY(empty, emitter->tag_directives)) {+ yaml_tag_directive_t tag_directive = POP(emitter, emitter->tag_directives);+ yaml_free(tag_directive.handle);+ yaml_free(tag_directive.prefix);+ }+ STACK_DEL(emitter, emitter->tag_directives);+ yaml_free(emitter->anchors);++ memset(emitter, 0, sizeof(yaml_emitter_t));+}++/*+ * String write handler.+ */++static int+yaml_string_write_handler(void *data, unsigned char *buffer, size_t size)+{+ yaml_emitter_t *emitter = data;++ if (emitter->output.string.size + *emitter->output.string.size_written+ < size) {+ memcpy(emitter->output.string.buffer+ + *emitter->output.string.size_written,+ buffer,+ emitter->output.string.size+ - *emitter->output.string.size_written);+ *emitter->output.string.size_written = emitter->output.string.size;+ return 0;+ }++ memcpy(emitter->output.string.buffer+ + *emitter->output.string.size_written, buffer, size);+ *emitter->output.string.size_written += size;+ return 1;+}++/*+ * File write handler.+ */++static int+yaml_file_write_handler(void *data, unsigned char *buffer, size_t size)+{+ yaml_emitter_t *emitter = data;++ return (fwrite(buffer, 1, size, emitter->output.file) == size);+}+/*+ * Set a string output.+ */++YAML_DECLARE(void)+yaml_emitter_set_output_string(yaml_emitter_t *emitter,+ unsigned char *output, size_t size, size_t *size_written)+{+ assert(emitter); /* Non-NULL emitter object expected. */+ assert(!emitter->write_handler); /* You can set the output only once. */+ assert(output); /* Non-NULL output string expected. */++ emitter->write_handler = yaml_string_write_handler;+ emitter->write_handler_data = emitter;++ emitter->output.string.buffer = output;+ emitter->output.string.size = size;+ emitter->output.string.size_written = size_written;+ *size_written = 0;+}++/*+ * Set a file output.+ */++YAML_DECLARE(void)+yaml_emitter_set_output_file(yaml_emitter_t *emitter, FILE *file)+{+ assert(emitter); /* Non-NULL emitter object expected. */+ assert(!emitter->write_handler); /* You can set the output only once. */+ assert(file); /* Non-NULL file object expected. */++ emitter->write_handler = yaml_file_write_handler;+ emitter->write_handler_data = emitter;++ emitter->output.file = file;+}++/*+ * Set a generic output handler.+ */++YAML_DECLARE(void)+yaml_emitter_set_output(yaml_emitter_t *emitter,+ yaml_write_handler_t *handler, void *data)+{+ assert(emitter); /* Non-NULL emitter object expected. */+ assert(!emitter->write_handler); /* You can set the output only once. */+ assert(handler); /* Non-NULL handler object expected. */++ emitter->write_handler = handler;+ emitter->write_handler_data = data;+}++/*+ * Set the output encoding.+ */++YAML_DECLARE(void)+yaml_emitter_set_encoding(yaml_emitter_t *emitter, yaml_encoding_t encoding)+{+ assert(emitter); /* Non-NULL emitter object expected. */+ assert(!emitter->encoding); /* You can set encoding only once. */++ emitter->encoding = encoding;+}++/*+ * Set the canonical output style.+ */++YAML_DECLARE(void)+yaml_emitter_set_canonical(yaml_emitter_t *emitter, int canonical)+{+ assert(emitter); /* Non-NULL emitter object expected. */++ emitter->canonical = (canonical != 0);+}++/*+ * Set the indentation increment.+ */++YAML_DECLARE(void)+yaml_emitter_set_indent(yaml_emitter_t *emitter, int indent)+{+ assert(emitter); /* Non-NULL emitter object expected. */++ emitter->best_indent = (1 < indent && indent < 10) ? indent : 2;+}++/*+ * Set the preferred line width.+ */++YAML_DECLARE(void)+yaml_emitter_set_width(yaml_emitter_t *emitter, int width)+{+ assert(emitter); /* Non-NULL emitter object expected. */++ emitter->best_width = (width >= 0) ? width : -1;+}++/*+ * Set if unescaped non-ASCII characters are allowed.+ */++YAML_DECLARE(void)+yaml_emitter_set_unicode(yaml_emitter_t *emitter, int unicode)+{+ assert(emitter); /* Non-NULL emitter object expected. */++ emitter->unicode = (unicode != 0);+}++/*+ * Set the preferred line break character.+ */++YAML_DECLARE(void)+yaml_emitter_set_break(yaml_emitter_t *emitter, yaml_break_t line_break)+{+ assert(emitter); /* Non-NULL emitter object expected. */++ emitter->line_break = line_break;+}++/*+ * Destroy a token object.+ */++YAML_DECLARE(void)+yaml_token_delete(yaml_token_t *token)+{+ assert(token); /* Non-NULL token object expected. */++ switch (token->type)+ {+ case YAML_TAG_DIRECTIVE_TOKEN:+ yaml_free(token->data.tag_directive.handle);+ yaml_free(token->data.tag_directive.prefix);+ break;++ case YAML_ALIAS_TOKEN:+ yaml_free(token->data.alias.value);+ break;++ case YAML_ANCHOR_TOKEN:+ yaml_free(token->data.anchor.value);+ break;++ case YAML_TAG_TOKEN:+ yaml_free(token->data.tag.handle);+ yaml_free(token->data.tag.suffix);+ break;++ case YAML_SCALAR_TOKEN:+ yaml_free(token->data.scalar.value);+ break;++ default:+ break;+ }++ memset(token, 0, sizeof(yaml_token_t));+}++/*+ * Check if a string is a valid UTF-8 sequence.+ *+ * Check 'reader.c' for more details on UTF-8 encoding.+ */++static int+yaml_check_utf8(yaml_char_t *start, size_t length)+{+ yaml_char_t *end = start+length;+ yaml_char_t *pointer = start;++ while (pointer < end) {+ unsigned char octet;+ unsigned int width;+ unsigned int value;+ size_t k;++ octet = pointer[0];+ width = (octet & 0x80) == 0x00 ? 1 :+ (octet & 0xE0) == 0xC0 ? 2 :+ (octet & 0xF0) == 0xE0 ? 3 :+ (octet & 0xF8) == 0xF0 ? 4 : 0;+ value = (octet & 0x80) == 0x00 ? octet & 0x7F :+ (octet & 0xE0) == 0xC0 ? octet & 0x1F :+ (octet & 0xF0) == 0xE0 ? octet & 0x0F :+ (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0;+ if (!width) return 0;+ if (pointer+width > end) return 0;+ for (k = 1; k < width; k ++) {+ octet = pointer[k];+ if ((octet & 0xC0) != 0x80) return 0;+ value = (value << 6) + (octet & 0x3F);+ }+ if (!((width == 1) ||+ (width == 2 && value >= 0x80) ||+ (width == 3 && value >= 0x800) ||+ (width == 4 && value >= 0x10000))) return 0;++ pointer += width;+ }++ return 1;+}++/*+ * Create STREAM-START.+ */++YAML_DECLARE(int)+yaml_stream_start_event_initialize(yaml_event_t *event,+ yaml_encoding_t encoding)+{+ yaml_mark_t mark = { 0, 0, 0 };++ assert(event); /* Non-NULL event object is expected. */++ STREAM_START_EVENT_INIT(*event, encoding, mark, mark);++ return 1;+}++/*+ * Create STREAM-END.+ */++YAML_DECLARE(int)+yaml_stream_end_event_initialize(yaml_event_t *event)+{+ yaml_mark_t mark = { 0, 0, 0 };++ assert(event); /* Non-NULL event object is expected. */++ STREAM_END_EVENT_INIT(*event, mark, mark);++ return 1;+}++/*+ * Create DOCUMENT-START.+ */++YAML_DECLARE(int)+yaml_document_start_event_initialize(yaml_event_t *event,+ yaml_version_directive_t *version_directive,+ yaml_tag_directive_t *tag_directives_start,+ yaml_tag_directive_t *tag_directives_end,+ int implicit)+{+ struct {+ yaml_error_type_t error;+ } context;+ yaml_mark_t mark = { 0, 0, 0 };+ yaml_version_directive_t *version_directive_copy = NULL;+ struct {+ yaml_tag_directive_t *start;+ yaml_tag_directive_t *end;+ yaml_tag_directive_t *top;+ } tag_directives_copy = { NULL, NULL, NULL };+ yaml_tag_directive_t value = { NULL, NULL };++ assert(event); /* Non-NULL event object is expected. */+ assert((tag_directives_start && tag_directives_end) ||+ (tag_directives_start == tag_directives_end));+ /* Valid tag directives are expected. */++ if (version_directive) {+ version_directive_copy = yaml_malloc(sizeof(yaml_version_directive_t));+ if (!version_directive_copy) goto error;+ version_directive_copy->major = version_directive->major;+ version_directive_copy->minor = version_directive->minor;+ }++ if (tag_directives_start != tag_directives_end) {+ yaml_tag_directive_t *tag_directive;+ if (!STACK_INIT(&context, tag_directives_copy, INITIAL_STACK_SIZE))+ goto error;+ for (tag_directive = tag_directives_start;+ tag_directive != tag_directives_end; tag_directive ++) {+ assert(tag_directive->handle);+ assert(tag_directive->prefix);+ if (!yaml_check_utf8(tag_directive->handle,+ strlen((char *)tag_directive->handle)))+ goto error;+ if (!yaml_check_utf8(tag_directive->prefix,+ strlen((char *)tag_directive->prefix)))+ goto error;+ value.handle = yaml_strdup(tag_directive->handle);+ value.prefix = yaml_strdup(tag_directive->prefix);+ if (!value.handle || !value.prefix) goto error;+ if (!PUSH(&context, tag_directives_copy, value))+ goto error;+ value.handle = NULL;+ value.prefix = NULL;+ }+ }++ DOCUMENT_START_EVENT_INIT(*event, version_directive_copy,+ tag_directives_copy.start, tag_directives_copy.top,+ implicit, mark, mark);++ return 1;++error:+ yaml_free(version_directive_copy);+ while (!STACK_EMPTY(context, tag_directives_copy)) {+ yaml_tag_directive_t value = POP(context, tag_directives_copy);+ yaml_free(value.handle);+ yaml_free(value.prefix);+ }+ STACK_DEL(context, tag_directives_copy);+ yaml_free(value.handle);+ yaml_free(value.prefix);++ return 0;+}++/*+ * Create DOCUMENT-END.+ */++YAML_DECLARE(int)+yaml_document_end_event_initialize(yaml_event_t *event, int implicit)+{+ yaml_mark_t mark = { 0, 0, 0 };++ assert(event); /* Non-NULL emitter object is expected. */++ DOCUMENT_END_EVENT_INIT(*event, implicit, mark, mark);++ return 1;+}++/*+ * Create ALIAS.+ */++YAML_DECLARE(int)+yaml_alias_event_initialize(yaml_event_t *event, yaml_char_t *anchor)+{+ yaml_mark_t mark = { 0, 0, 0 };+ yaml_char_t *anchor_copy = NULL;++ assert(event); /* Non-NULL event object is expected. */+ assert(anchor); /* Non-NULL anchor is expected. */++ if (!yaml_check_utf8(anchor, strlen((char *)anchor))) return 0;++ anchor_copy = yaml_strdup(anchor);+ if (!anchor_copy)+ return 0;++ ALIAS_EVENT_INIT(*event, anchor_copy, mark, mark);++ return 1;+}++/*+ * Create SCALAR.+ */++YAML_DECLARE(int)+yaml_scalar_event_initialize(yaml_event_t *event,+ yaml_char_t *anchor, yaml_char_t *tag,+ yaml_char_t *value, int length,+ int plain_implicit, int quoted_implicit,+ yaml_scalar_style_t style)+{+ yaml_mark_t mark = { 0, 0, 0 };+ yaml_char_t *anchor_copy = NULL;+ yaml_char_t *tag_copy = NULL;+ yaml_char_t *value_copy = NULL;++ assert(event); /* Non-NULL event object is expected. */+ /* following line added for Haskell yaml library */+ if (!value && !length) value = "";+ assert(value); /* Non-NULL anchor is expected. */++ if (anchor) {+ if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error;+ anchor_copy = yaml_strdup(anchor);+ if (!anchor_copy) goto error;+ }++ if (tag) {+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;+ tag_copy = yaml_strdup(tag);+ if (!tag_copy) goto error;+ }++ if (length < 0) {+ length = strlen((char *)value);+ }++ if (!yaml_check_utf8(value, length)) goto error;+ value_copy = yaml_malloc(length+1);+ if (!value_copy) goto error;+ memcpy(value_copy, value, length);+ value_copy[length] = '\0';++ SCALAR_EVENT_INIT(*event, anchor_copy, tag_copy, value_copy, length,+ plain_implicit, quoted_implicit, style, mark, mark);++ return 1;++error:+ yaml_free(anchor_copy);+ yaml_free(tag_copy);+ yaml_free(value_copy);++ return 0;+}++/*+ * Create SEQUENCE-START.+ */++YAML_DECLARE(int)+yaml_sequence_start_event_initialize(yaml_event_t *event,+ yaml_char_t *anchor, yaml_char_t *tag, int implicit,+ yaml_sequence_style_t style)+{+ yaml_mark_t mark = { 0, 0, 0 };+ yaml_char_t *anchor_copy = NULL;+ yaml_char_t *tag_copy = NULL;++ assert(event); /* Non-NULL event object is expected. */++ if (anchor) {+ if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error;+ anchor_copy = yaml_strdup(anchor);+ if (!anchor_copy) goto error;+ }++ if (tag) {+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;+ tag_copy = yaml_strdup(tag);+ if (!tag_copy) goto error;+ }++ SEQUENCE_START_EVENT_INIT(*event, anchor_copy, tag_copy,+ implicit, style, mark, mark);++ return 1;++error:+ yaml_free(anchor_copy);+ yaml_free(tag_copy);++ return 0;+}++/*+ * Create SEQUENCE-END.+ */++YAML_DECLARE(int)+yaml_sequence_end_event_initialize(yaml_event_t *event)+{+ yaml_mark_t mark = { 0, 0, 0 };++ assert(event); /* Non-NULL event object is expected. */++ SEQUENCE_END_EVENT_INIT(*event, mark, mark);++ return 1;+}++/*+ * Create MAPPING-START.+ */++YAML_DECLARE(int)+yaml_mapping_start_event_initialize(yaml_event_t *event,+ yaml_char_t *anchor, yaml_char_t *tag, int implicit,+ yaml_mapping_style_t style)+{+ yaml_mark_t mark = { 0, 0, 0 };+ yaml_char_t *anchor_copy = NULL;+ yaml_char_t *tag_copy = NULL;++ assert(event); /* Non-NULL event object is expected. */++ if (anchor) {+ if (!yaml_check_utf8(anchor, strlen((char *)anchor))) goto error;+ anchor_copy = yaml_strdup(anchor);+ if (!anchor_copy) goto error;+ }++ if (tag) {+ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;+ tag_copy = yaml_strdup(tag);+ if (!tag_copy) goto error;+ }++ MAPPING_START_EVENT_INIT(*event, anchor_copy, tag_copy,+ implicit, style, mark, mark);++ return 1;++error:+ yaml_free(anchor_copy);+ yaml_free(tag_copy);++ return 0;+}++/*+ * Create MAPPING-END.+ */++YAML_DECLARE(int)+yaml_mapping_end_event_initialize(yaml_event_t *event)+{+ yaml_mark_t mark = { 0, 0, 0 };++ assert(event); /* Non-NULL event object is expected. */++ MAPPING_END_EVENT_INIT(*event, mark, mark);++ return 1;+}++/*+ * Destroy an event object.+ */++YAML_DECLARE(void)+yaml_event_delete(yaml_event_t *event)+{+ yaml_tag_directive_t *tag_directive;++ assert(event); /* Non-NULL event object expected. */++ switch (event->type)+ {+ case YAML_DOCUMENT_START_EVENT:+ yaml_free(event->data.document_start.version_directive);+ for (tag_directive = event->data.document_start.tag_directives.start;+ tag_directive != event->data.document_start.tag_directives.end;+ tag_directive++) {+ yaml_free(tag_directive->handle);+ yaml_free(tag_directive->prefix);+ }+ yaml_free(event->data.document_start.tag_directives.start);+ break;++ case YAML_ALIAS_EVENT:+ yaml_free(event->data.alias.anchor);+ break;++ case YAML_SCALAR_EVENT:+ yaml_free(event->data.scalar.anchor);+ yaml_free(event->data.scalar.tag);+ yaml_free(event->data.scalar.value);+ break;++ case YAML_SEQUENCE_START_EVENT:+ yaml_free(event->data.sequence_start.anchor);+ yaml_free(event->data.sequence_start.tag);+ break;++ case YAML_MAPPING_START_EVENT:+ yaml_free(event->data.mapping_start.anchor);+ yaml_free(event->data.mapping_start.tag);+ break;++ default:+ break;+ }++ memset(event, 0, sizeof(yaml_event_t));+}++/*+ * Create a document object.+ */++YAML_DECLARE(int)+yaml_document_initialize(yaml_document_t *document,+ yaml_version_directive_t *version_directive,+ yaml_tag_directive_t *tag_directives_start,+ yaml_tag_directive_t *tag_directives_end,+ int start_implicit, int end_implicit)+{+ struct {+ yaml_error_type_t error;+ } context;+ struct {+ yaml_node_t *start;+ yaml_node_t *end;+ yaml_node_t *top;+ } nodes = { NULL, NULL, NULL };+ yaml_version_directive_t *version_directive_copy = NULL;+ struct {+ yaml_tag_directive_t *start;+ yaml_tag_directive_t *end;+ yaml_tag_directive_t *top;+ } tag_directives_copy = { NULL, NULL, NULL };+ yaml_tag_directive_t value = { NULL, NULL };+ yaml_mark_t mark = { 0, 0, 0 };++ assert(document); /* Non-NULL document object is expected. */+ assert((tag_directives_start && tag_directives_end) ||+ (tag_directives_start == tag_directives_end));+ /* Valid tag directives are expected. */++ if (!STACK_INIT(&context, nodes, INITIAL_STACK_SIZE)) goto error;++ if (version_directive) {+ version_directive_copy = yaml_malloc(sizeof(yaml_version_directive_t));+ if (!version_directive_copy) goto error;+ version_directive_copy->major = version_directive->major;+ version_directive_copy->minor = version_directive->minor;+ }++ if (tag_directives_start != tag_directives_end) {+ yaml_tag_directive_t *tag_directive;+ if (!STACK_INIT(&context, tag_directives_copy, INITIAL_STACK_SIZE))+ goto error;+ for (tag_directive = tag_directives_start;+ tag_directive != tag_directives_end; tag_directive ++) {+ assert(tag_directive->handle);+ assert(tag_directive->prefix);+ if (!yaml_check_utf8(tag_directive->handle,+ strlen((char *)tag_directive->handle)))+ goto error;+ if (!yaml_check_utf8(tag_directive->prefix,+ strlen((char *)tag_directive->prefix)))+ goto error;+ value.handle = yaml_strdup(tag_directive->handle);+ value.prefix = yaml_strdup(tag_directive->prefix);+ if (!value.handle || !value.prefix) goto error;+ if (!PUSH(&context, tag_directives_copy, value))+ goto error;+ value.handle = NULL;+ value.prefix = NULL;+ }+ }++ DOCUMENT_INIT(*document, nodes.start, nodes.end, version_directive_copy,+ tag_directives_copy.start, tag_directives_copy.top,+ start_implicit, end_implicit, mark, mark);++ return 1;++error:+ STACK_DEL(&context, nodes);+ yaml_free(version_directive_copy);+ while (!STACK_EMPTY(&context, tag_directives_copy)) {+ yaml_tag_directive_t value = POP(&context, tag_directives_copy);+ yaml_free(value.handle);+ yaml_free(value.prefix);+ }+ STACK_DEL(&context, tag_directives_copy);+ yaml_free(value.handle);+ yaml_free(value.prefix);++ return 0;+}++/*+ * Destroy a document object.+ */++YAML_DECLARE(void)+yaml_document_delete(yaml_document_t *document)+{+ struct {+ yaml_error_type_t error;+ } context;+ yaml_tag_directive_t *tag_directive;++ context.error = YAML_NO_ERROR; /* Eliminate a compliler warning. */++ assert(document); /* Non-NULL document object is expected. */++ while (!STACK_EMPTY(&context, document->nodes)) {+ yaml_node_t node = POP(&context, document->nodes);+ yaml_free(node.tag);+ switch (node.type) {+ case YAML_SCALAR_NODE:+ yaml_free(node.data.scalar.value);+ break;+ case YAML_SEQUENCE_NODE:+ STACK_DEL(&context, node.data.sequence.items);+ break;+ case YAML_MAPPING_NODE:+ STACK_DEL(&context, node.data.mapping.pairs);+ break;+ default:+ assert(0); /* Should not happen. */+ }+ }+ STACK_DEL(&context, document->nodes);++ yaml_free(document->version_directive);+ for (tag_directive = document->tag_directives.start;+ tag_directive != document->tag_directives.end;+ tag_directive++) {+ yaml_free(tag_directive->handle);+ yaml_free(tag_directive->prefix);+ }+ yaml_free(document->tag_directives.start);++ memset(document, 0, sizeof(yaml_document_t));+}++/**+ * Get a document node.+ */++YAML_DECLARE(yaml_node_t *)+yaml_document_get_node(yaml_document_t *document, int index)+{+ assert(document); /* Non-NULL document object is expected. */++ if (index > 0 && document->nodes.start + index <= document->nodes.top) {+ return document->nodes.start + index - 1;+ }+ return NULL;+}++/**+ * Get the root object.+ */++YAML_DECLARE(yaml_node_t *)+yaml_document_get_root_node(yaml_document_t *document)+{+ assert(document); /* Non-NULL document object is expected. */++ if (document->nodes.top != document->nodes.start) {+ return document->nodes.start;+ }+ return NULL;+}++/*+ * Add a scalar node to a document.+ */++YAML_DECLARE(int)+yaml_document_add_scalar(yaml_document_t *document,+ yaml_char_t *tag, yaml_char_t *value, int length,+ yaml_scalar_style_t style)+{+ struct {+ yaml_error_type_t error;+ } context;+ yaml_mark_t mark = { 0, 0, 0 };+ yaml_char_t *tag_copy = NULL;+ yaml_char_t *value_copy = NULL;+ yaml_node_t node;++ assert(document); /* Non-NULL document object is expected. */+ assert(value); /* Non-NULL value is expected. */++ if (!tag) {+ tag = (yaml_char_t *)YAML_DEFAULT_SCALAR_TAG;+ }++ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;+ tag_copy = yaml_strdup(tag);+ if (!tag_copy) goto error;++ if (length < 0) {+ length = strlen((char *)value);+ }++ if (!yaml_check_utf8(value, length)) goto error;+ value_copy = yaml_malloc(length+1);+ if (!value_copy) goto error;+ memcpy(value_copy, value, length);+ value_copy[length] = '\0';++ SCALAR_NODE_INIT(node, tag_copy, value_copy, length, style, mark, mark);+ if (!PUSH(&context, document->nodes, node)) goto error;++ return document->nodes.top - document->nodes.start;++error:+ yaml_free(tag_copy);+ yaml_free(value_copy);++ return 0;+}++/*+ * Add a sequence node to a document.+ */++YAML_DECLARE(int)+yaml_document_add_sequence(yaml_document_t *document,+ yaml_char_t *tag, yaml_sequence_style_t style)+{+ struct {+ yaml_error_type_t error;+ } context;+ yaml_mark_t mark = { 0, 0, 0 };+ yaml_char_t *tag_copy = NULL;+ struct {+ yaml_node_item_t *start;+ yaml_node_item_t *end;+ yaml_node_item_t *top;+ } items = { NULL, NULL, NULL };+ yaml_node_t node;++ assert(document); /* Non-NULL document object is expected. */++ if (!tag) {+ tag = (yaml_char_t *)YAML_DEFAULT_SEQUENCE_TAG;+ }++ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;+ tag_copy = yaml_strdup(tag);+ if (!tag_copy) goto error;++ if (!STACK_INIT(&context, items, INITIAL_STACK_SIZE)) goto error;++ SEQUENCE_NODE_INIT(node, tag_copy, items.start, items.end,+ style, mark, mark);+ if (!PUSH(&context, document->nodes, node)) goto error;++ return document->nodes.top - document->nodes.start;++error:+ STACK_DEL(&context, items);+ yaml_free(tag_copy);++ return 0;+}++/*+ * Add a mapping node to a document.+ */++YAML_DECLARE(int)+yaml_document_add_mapping(yaml_document_t *document,+ yaml_char_t *tag, yaml_mapping_style_t style)+{+ struct {+ yaml_error_type_t error;+ } context;+ yaml_mark_t mark = { 0, 0, 0 };+ yaml_char_t *tag_copy = NULL;+ struct {+ yaml_node_pair_t *start;+ yaml_node_pair_t *end;+ yaml_node_pair_t *top;+ } pairs = { NULL, NULL, NULL };+ yaml_node_t node;++ assert(document); /* Non-NULL document object is expected. */++ if (!tag) {+ tag = (yaml_char_t *)YAML_DEFAULT_MAPPING_TAG;+ }++ if (!yaml_check_utf8(tag, strlen((char *)tag))) goto error;+ tag_copy = yaml_strdup(tag);+ if (!tag_copy) goto error;++ if (!STACK_INIT(&context, pairs, INITIAL_STACK_SIZE)) goto error;++ MAPPING_NODE_INIT(node, tag_copy, pairs.start, pairs.end,+ style, mark, mark);+ if (!PUSH(&context, document->nodes, node)) goto error;++ return document->nodes.top - document->nodes.start;++error:+ STACK_DEL(&context, pairs);+ yaml_free(tag_copy);++ return 0;+}++/*+ * Append an item to a sequence node.+ */++YAML_DECLARE(int)+yaml_document_append_sequence_item(yaml_document_t *document,+ int sequence, int item)+{+ struct {+ yaml_error_type_t error;+ } context;++ assert(document); /* Non-NULL document is required. */+ assert(sequence > 0+ && document->nodes.start + sequence <= document->nodes.top);+ /* Valid sequence id is required. */+ assert(document->nodes.start[sequence-1].type == YAML_SEQUENCE_NODE);+ /* A sequence node is required. */+ assert(item > 0 && document->nodes.start + item <= document->nodes.top);+ /* Valid item id is required. */++ if (!PUSH(&context,+ document->nodes.start[sequence-1].data.sequence.items, item))+ return 0;++ return 1;+}++/*+ * Append a pair of a key and a value to a mapping node.+ */++YAML_DECLARE(int)+yaml_document_append_mapping_pair(yaml_document_t *document,+ int mapping, int key, int value)+{+ struct {+ yaml_error_type_t error;+ } context;+ yaml_node_pair_t pair = { key, value };++ assert(document); /* Non-NULL document is required. */+ assert(mapping > 0+ && document->nodes.start + mapping <= document->nodes.top);+ /* Valid mapping id is required. */+ assert(document->nodes.start[mapping-1].type == YAML_MAPPING_NODE);+ /* A mapping node is required. */+ assert(key > 0 && document->nodes.start + key <= document->nodes.top);+ /* Valid key id is required. */+ assert(value > 0 && document->nodes.start + value <= document->nodes.top);+ /* Valid value id is required. */++ if (!PUSH(&context,+ document->nodes.start[mapping-1].data.mapping.pairs, pair))+ return 0;++ return 1;+}++
libyaml/dumper.c view
@@ -1,394 +1,394 @@- -#include "yaml_private.h" - -/* - * API functions. - */ - -YAML_DECLARE(int) -yaml_emitter_open(yaml_emitter_t *emitter); - -YAML_DECLARE(int) -yaml_emitter_close(yaml_emitter_t *emitter); - -YAML_DECLARE(int) -yaml_emitter_dump(yaml_emitter_t *emitter, yaml_document_t *document); - -/* - * Clean up functions. - */ - -static void -yaml_emitter_delete_document_and_anchors(yaml_emitter_t *emitter); - -/* - * Anchor functions. - */ - -static void -yaml_emitter_anchor_node(yaml_emitter_t *emitter, int index); - -static yaml_char_t * -yaml_emitter_generate_anchor(yaml_emitter_t *emitter, int anchor_id); - - -/* - * Serialize functions. - */ - -static int -yaml_emitter_dump_node(yaml_emitter_t *emitter, int index); - -static int -yaml_emitter_dump_alias(yaml_emitter_t *emitter, yaml_char_t *anchor); - -static int -yaml_emitter_dump_scalar(yaml_emitter_t *emitter, yaml_node_t *node, - yaml_char_t *anchor); - -static int -yaml_emitter_dump_sequence(yaml_emitter_t *emitter, yaml_node_t *node, - yaml_char_t *anchor); - -static int -yaml_emitter_dump_mapping(yaml_emitter_t *emitter, yaml_node_t *node, - yaml_char_t *anchor); - -/* - * Issue a STREAM-START event. - */ - -YAML_DECLARE(int) -yaml_emitter_open(yaml_emitter_t *emitter) -{ - yaml_event_t event; - yaml_mark_t mark = { 0, 0, 0 }; - - assert(emitter); /* Non-NULL emitter object is required. */ - assert(!emitter->opened); /* Emitter should not be opened yet. */ - - STREAM_START_EVENT_INIT(event, YAML_ANY_ENCODING, mark, mark); - - if (!yaml_emitter_emit(emitter, &event)) { - return 0; - } - - emitter->opened = 1; - - return 1; -} - -/* - * Issue a STREAM-END event. - */ - -YAML_DECLARE(int) -yaml_emitter_close(yaml_emitter_t *emitter) -{ - yaml_event_t event; - yaml_mark_t mark = { 0, 0, 0 }; - - assert(emitter); /* Non-NULL emitter object is required. */ - assert(emitter->opened); /* Emitter should be opened. */ - - if (emitter->closed) return 1; - - STREAM_END_EVENT_INIT(event, mark, mark); - - if (!yaml_emitter_emit(emitter, &event)) { - return 0; - } - - emitter->closed = 1; - - return 1; -} - -/* - * Dump a YAML document. - */ - -YAML_DECLARE(int) -yaml_emitter_dump(yaml_emitter_t *emitter, yaml_document_t *document) -{ - yaml_event_t event; - yaml_mark_t mark = { 0, 0, 0 }; - - assert(emitter); /* Non-NULL emitter object is required. */ - assert(document); /* Non-NULL emitter object is expected. */ - - emitter->document = document; - - if (!emitter->opened) { - if (!yaml_emitter_open(emitter)) goto error; - } - - if (STACK_EMPTY(emitter, document->nodes)) { - if (!yaml_emitter_close(emitter)) goto error; - yaml_emitter_delete_document_and_anchors(emitter); - return 1; - } - - assert(emitter->opened); /* Emitter should be opened. */ - - emitter->anchors = yaml_malloc(sizeof(*(emitter->anchors)) - * (document->nodes.top - document->nodes.start)); - if (!emitter->anchors) goto error; - memset(emitter->anchors, 0, sizeof(*(emitter->anchors)) - * (document->nodes.top - document->nodes.start)); - - DOCUMENT_START_EVENT_INIT(event, document->version_directive, - document->tag_directives.start, document->tag_directives.end, - document->start_implicit, mark, mark); - if (!yaml_emitter_emit(emitter, &event)) goto error; - - yaml_emitter_anchor_node(emitter, 1); - if (!yaml_emitter_dump_node(emitter, 1)) goto error; - - DOCUMENT_END_EVENT_INIT(event, document->end_implicit, mark, mark); - if (!yaml_emitter_emit(emitter, &event)) goto error; - - yaml_emitter_delete_document_and_anchors(emitter); - - return 1; - -error: - - yaml_emitter_delete_document_and_anchors(emitter); - - return 0; -} - -/* - * Clean up the emitter object after a document is dumped. - */ - -static void -yaml_emitter_delete_document_and_anchors(yaml_emitter_t *emitter) -{ - int index; - - if (!emitter->anchors) { - yaml_document_delete(emitter->document); - emitter->document = NULL; - return; - } - - for (index = 0; emitter->document->nodes.start + index - < emitter->document->nodes.top; index ++) { - yaml_node_t node = emitter->document->nodes.start[index]; - if (!emitter->anchors[index].serialized) { - yaml_free(node.tag); - if (node.type == YAML_SCALAR_NODE) { - yaml_free(node.data.scalar.value); - } - } - if (node.type == YAML_SEQUENCE_NODE) { - STACK_DEL(emitter, node.data.sequence.items); - } - if (node.type == YAML_MAPPING_NODE) { - STACK_DEL(emitter, node.data.mapping.pairs); - } - } - - STACK_DEL(emitter, emitter->document->nodes); - yaml_free(emitter->anchors); - - emitter->anchors = NULL; - emitter->last_anchor_id = 0; - emitter->document = NULL; -} - -/* - * Check the references of a node and assign the anchor id if needed. - */ - -static void -yaml_emitter_anchor_node(yaml_emitter_t *emitter, int index) -{ - yaml_node_t *node = emitter->document->nodes.start + index - 1; - yaml_node_item_t *item; - yaml_node_pair_t *pair; - - emitter->anchors[index-1].references ++; - - if (emitter->anchors[index-1].references == 1) { - switch (node->type) { - case YAML_SEQUENCE_NODE: - for (item = node->data.sequence.items.start; - item < node->data.sequence.items.top; item ++) { - yaml_emitter_anchor_node(emitter, *item); - } - break; - case YAML_MAPPING_NODE: - for (pair = node->data.mapping.pairs.start; - pair < node->data.mapping.pairs.top; pair ++) { - yaml_emitter_anchor_node(emitter, pair->key); - yaml_emitter_anchor_node(emitter, pair->value); - } - break; - default: - break; - } - } - - else if (emitter->anchors[index-1].references == 2) { - emitter->anchors[index-1].anchor = (++ emitter->last_anchor_id); - } -} - -/* - * Generate a textual representation for an anchor. - */ - -#define ANCHOR_TEMPLATE "id%03d" -#define ANCHOR_TEMPLATE_LENGTH 16 - -static yaml_char_t * -yaml_emitter_generate_anchor(yaml_emitter_t *emitter, int anchor_id) -{ - yaml_char_t *anchor = yaml_malloc(ANCHOR_TEMPLATE_LENGTH); - - if (!anchor) return NULL; - - sprintf((char *)anchor, ANCHOR_TEMPLATE, anchor_id); - - return anchor; -} - -/* - * Serialize a node. - */ - -static int -yaml_emitter_dump_node(yaml_emitter_t *emitter, int index) -{ - yaml_node_t *node = emitter->document->nodes.start + index - 1; - int anchor_id = emitter->anchors[index-1].anchor; - yaml_char_t *anchor = NULL; - - if (anchor_id) { - anchor = yaml_emitter_generate_anchor(emitter, anchor_id); - if (!anchor) return 0; - } - - if (emitter->anchors[index-1].serialized) { - return yaml_emitter_dump_alias(emitter, anchor); - } - - emitter->anchors[index-1].serialized = 1; - - switch (node->type) { - case YAML_SCALAR_NODE: - return yaml_emitter_dump_scalar(emitter, node, anchor); - case YAML_SEQUENCE_NODE: - return yaml_emitter_dump_sequence(emitter, node, anchor); - case YAML_MAPPING_NODE: - return yaml_emitter_dump_mapping(emitter, node, anchor); - default: - assert(0); /* Could not happen. */ - break; - } - - return 0; /* Could not happen. */ -} - -/* - * Serialize an alias. - */ - -static int -yaml_emitter_dump_alias(yaml_emitter_t *emitter, yaml_char_t *anchor) -{ - yaml_event_t event; - yaml_mark_t mark = { 0, 0, 0 }; - - ALIAS_EVENT_INIT(event, anchor, mark, mark); - - return yaml_emitter_emit(emitter, &event); -} - -/* - * Serialize a scalar. - */ - -static int -yaml_emitter_dump_scalar(yaml_emitter_t *emitter, yaml_node_t *node, - yaml_char_t *anchor) -{ - yaml_event_t event; - yaml_mark_t mark = { 0, 0, 0 }; - - int plain_implicit = (strcmp((char *)node->tag, - YAML_DEFAULT_SCALAR_TAG) == 0); - int quoted_implicit = (strcmp((char *)node->tag, - YAML_DEFAULT_SCALAR_TAG) == 0); - - SCALAR_EVENT_INIT(event, anchor, node->tag, node->data.scalar.value, - node->data.scalar.length, plain_implicit, quoted_implicit, - node->data.scalar.style, mark, mark); - - return yaml_emitter_emit(emitter, &event); -} - -/* - * Serialize a sequence. - */ - -static int -yaml_emitter_dump_sequence(yaml_emitter_t *emitter, yaml_node_t *node, - yaml_char_t *anchor) -{ - yaml_event_t event; - yaml_mark_t mark = { 0, 0, 0 }; - - int implicit = (strcmp((char *)node->tag, YAML_DEFAULT_SEQUENCE_TAG) == 0); - - yaml_node_item_t *item; - - SEQUENCE_START_EVENT_INIT(event, anchor, node->tag, implicit, - node->data.sequence.style, mark, mark); - if (!yaml_emitter_emit(emitter, &event)) return 0; - - for (item = node->data.sequence.items.start; - item < node->data.sequence.items.top; item ++) { - if (!yaml_emitter_dump_node(emitter, *item)) return 0; - } - - SEQUENCE_END_EVENT_INIT(event, mark, mark); - if (!yaml_emitter_emit(emitter, &event)) return 0; - - return 1; -} - -/* - * Serialize a mapping. - */ - -static int -yaml_emitter_dump_mapping(yaml_emitter_t *emitter, yaml_node_t *node, - yaml_char_t *anchor) -{ - yaml_event_t event; - yaml_mark_t mark = { 0, 0, 0 }; - - int implicit = (strcmp((char *)node->tag, YAML_DEFAULT_MAPPING_TAG) == 0); - - yaml_node_pair_t *pair; - - MAPPING_START_EVENT_INIT(event, anchor, node->tag, implicit, - node->data.mapping.style, mark, mark); - if (!yaml_emitter_emit(emitter, &event)) return 0; - - for (pair = node->data.mapping.pairs.start; - pair < node->data.mapping.pairs.top; pair ++) { - if (!yaml_emitter_dump_node(emitter, pair->key)) return 0; - if (!yaml_emitter_dump_node(emitter, pair->value)) return 0; - } - - MAPPING_END_EVENT_INIT(event, mark, mark); - if (!yaml_emitter_emit(emitter, &event)) return 0; - - return 1; -} - ++#include "yaml_private.h"++/*+ * API functions.+ */++YAML_DECLARE(int)+yaml_emitter_open(yaml_emitter_t *emitter);++YAML_DECLARE(int)+yaml_emitter_close(yaml_emitter_t *emitter);++YAML_DECLARE(int)+yaml_emitter_dump(yaml_emitter_t *emitter, yaml_document_t *document);++/*+ * Clean up functions.+ */++static void+yaml_emitter_delete_document_and_anchors(yaml_emitter_t *emitter);++/*+ * Anchor functions.+ */++static void+yaml_emitter_anchor_node(yaml_emitter_t *emitter, int index);++static yaml_char_t *+yaml_emitter_generate_anchor(yaml_emitter_t *emitter, int anchor_id);+++/*+ * Serialize functions.+ */++static int+yaml_emitter_dump_node(yaml_emitter_t *emitter, int index);++static int+yaml_emitter_dump_alias(yaml_emitter_t *emitter, yaml_char_t *anchor);++static int+yaml_emitter_dump_scalar(yaml_emitter_t *emitter, yaml_node_t *node,+ yaml_char_t *anchor);++static int+yaml_emitter_dump_sequence(yaml_emitter_t *emitter, yaml_node_t *node,+ yaml_char_t *anchor);++static int+yaml_emitter_dump_mapping(yaml_emitter_t *emitter, yaml_node_t *node,+ yaml_char_t *anchor);++/*+ * Issue a STREAM-START event.+ */++YAML_DECLARE(int)+yaml_emitter_open(yaml_emitter_t *emitter)+{+ yaml_event_t event;+ yaml_mark_t mark = { 0, 0, 0 };++ assert(emitter); /* Non-NULL emitter object is required. */+ assert(!emitter->opened); /* Emitter should not be opened yet. */++ STREAM_START_EVENT_INIT(event, YAML_ANY_ENCODING, mark, mark);++ if (!yaml_emitter_emit(emitter, &event)) {+ return 0;+ }++ emitter->opened = 1;++ return 1;+}++/*+ * Issue a STREAM-END event.+ */++YAML_DECLARE(int)+yaml_emitter_close(yaml_emitter_t *emitter)+{+ yaml_event_t event;+ yaml_mark_t mark = { 0, 0, 0 };++ assert(emitter); /* Non-NULL emitter object is required. */+ assert(emitter->opened); /* Emitter should be opened. */++ if (emitter->closed) return 1;++ STREAM_END_EVENT_INIT(event, mark, mark);++ if (!yaml_emitter_emit(emitter, &event)) {+ return 0;+ }++ emitter->closed = 1;++ return 1;+}++/*+ * Dump a YAML document.+ */++YAML_DECLARE(int)+yaml_emitter_dump(yaml_emitter_t *emitter, yaml_document_t *document)+{+ yaml_event_t event;+ yaml_mark_t mark = { 0, 0, 0 };++ assert(emitter); /* Non-NULL emitter object is required. */+ assert(document); /* Non-NULL emitter object is expected. */++ emitter->document = document;++ if (!emitter->opened) {+ if (!yaml_emitter_open(emitter)) goto error;+ }++ if (STACK_EMPTY(emitter, document->nodes)) {+ if (!yaml_emitter_close(emitter)) goto error;+ yaml_emitter_delete_document_and_anchors(emitter);+ return 1;+ }++ assert(emitter->opened); /* Emitter should be opened. */++ emitter->anchors = yaml_malloc(sizeof(*(emitter->anchors))+ * (document->nodes.top - document->nodes.start));+ if (!emitter->anchors) goto error;+ memset(emitter->anchors, 0, sizeof(*(emitter->anchors))+ * (document->nodes.top - document->nodes.start));++ DOCUMENT_START_EVENT_INIT(event, document->version_directive,+ document->tag_directives.start, document->tag_directives.end,+ document->start_implicit, mark, mark);+ if (!yaml_emitter_emit(emitter, &event)) goto error;++ yaml_emitter_anchor_node(emitter, 1);+ if (!yaml_emitter_dump_node(emitter, 1)) goto error;++ DOCUMENT_END_EVENT_INIT(event, document->end_implicit, mark, mark);+ if (!yaml_emitter_emit(emitter, &event)) goto error;++ yaml_emitter_delete_document_and_anchors(emitter);++ return 1;++error:++ yaml_emitter_delete_document_and_anchors(emitter);++ return 0;+}++/*+ * Clean up the emitter object after a document is dumped.+ */++static void+yaml_emitter_delete_document_and_anchors(yaml_emitter_t *emitter)+{+ int index;++ if (!emitter->anchors) {+ yaml_document_delete(emitter->document);+ emitter->document = NULL;+ return;+ }++ for (index = 0; emitter->document->nodes.start + index+ < emitter->document->nodes.top; index ++) {+ yaml_node_t node = emitter->document->nodes.start[index];+ if (!emitter->anchors[index].serialized) {+ yaml_free(node.tag);+ if (node.type == YAML_SCALAR_NODE) {+ yaml_free(node.data.scalar.value);+ }+ }+ if (node.type == YAML_SEQUENCE_NODE) {+ STACK_DEL(emitter, node.data.sequence.items);+ }+ if (node.type == YAML_MAPPING_NODE) {+ STACK_DEL(emitter, node.data.mapping.pairs);+ }+ }++ STACK_DEL(emitter, emitter->document->nodes);+ yaml_free(emitter->anchors);++ emitter->anchors = NULL;+ emitter->last_anchor_id = 0;+ emitter->document = NULL;+}++/*+ * Check the references of a node and assign the anchor id if needed.+ */++static void+yaml_emitter_anchor_node(yaml_emitter_t *emitter, int index)+{+ yaml_node_t *node = emitter->document->nodes.start + index - 1;+ yaml_node_item_t *item;+ yaml_node_pair_t *pair;++ emitter->anchors[index-1].references ++;++ if (emitter->anchors[index-1].references == 1) {+ switch (node->type) {+ case YAML_SEQUENCE_NODE:+ for (item = node->data.sequence.items.start;+ item < node->data.sequence.items.top; item ++) {+ yaml_emitter_anchor_node(emitter, *item);+ }+ break;+ case YAML_MAPPING_NODE:+ for (pair = node->data.mapping.pairs.start;+ pair < node->data.mapping.pairs.top; pair ++) {+ yaml_emitter_anchor_node(emitter, pair->key);+ yaml_emitter_anchor_node(emitter, pair->value);+ }+ break;+ default:+ break;+ }+ }++ else if (emitter->anchors[index-1].references == 2) {+ emitter->anchors[index-1].anchor = (++ emitter->last_anchor_id);+ }+}++/*+ * Generate a textual representation for an anchor.+ */++#define ANCHOR_TEMPLATE "id%03d"+#define ANCHOR_TEMPLATE_LENGTH 16++static yaml_char_t *+yaml_emitter_generate_anchor(yaml_emitter_t *emitter, int anchor_id)+{+ yaml_char_t *anchor = yaml_malloc(ANCHOR_TEMPLATE_LENGTH);++ if (!anchor) return NULL;++ sprintf((char *)anchor, ANCHOR_TEMPLATE, anchor_id);++ return anchor;+}++/*+ * Serialize a node.+ */++static int+yaml_emitter_dump_node(yaml_emitter_t *emitter, int index)+{+ yaml_node_t *node = emitter->document->nodes.start + index - 1;+ int anchor_id = emitter->anchors[index-1].anchor;+ yaml_char_t *anchor = NULL;++ if (anchor_id) {+ anchor = yaml_emitter_generate_anchor(emitter, anchor_id);+ if (!anchor) return 0;+ }++ if (emitter->anchors[index-1].serialized) {+ return yaml_emitter_dump_alias(emitter, anchor);+ }++ emitter->anchors[index-1].serialized = 1;++ switch (node->type) {+ case YAML_SCALAR_NODE:+ return yaml_emitter_dump_scalar(emitter, node, anchor);+ case YAML_SEQUENCE_NODE:+ return yaml_emitter_dump_sequence(emitter, node, anchor);+ case YAML_MAPPING_NODE:+ return yaml_emitter_dump_mapping(emitter, node, anchor);+ default:+ assert(0); /* Could not happen. */+ break;+ }++ return 0; /* Could not happen. */+}++/*+ * Serialize an alias.+ */++static int+yaml_emitter_dump_alias(yaml_emitter_t *emitter, yaml_char_t *anchor)+{+ yaml_event_t event;+ yaml_mark_t mark = { 0, 0, 0 };++ ALIAS_EVENT_INIT(event, anchor, mark, mark);++ return yaml_emitter_emit(emitter, &event);+}++/*+ * Serialize a scalar.+ */++static int+yaml_emitter_dump_scalar(yaml_emitter_t *emitter, yaml_node_t *node,+ yaml_char_t *anchor)+{+ yaml_event_t event;+ yaml_mark_t mark = { 0, 0, 0 };++ int plain_implicit = (strcmp((char *)node->tag,+ YAML_DEFAULT_SCALAR_TAG) == 0);+ int quoted_implicit = (strcmp((char *)node->tag,+ YAML_DEFAULT_SCALAR_TAG) == 0);++ SCALAR_EVENT_INIT(event, anchor, node->tag, node->data.scalar.value,+ node->data.scalar.length, plain_implicit, quoted_implicit,+ node->data.scalar.style, mark, mark);++ return yaml_emitter_emit(emitter, &event);+}++/*+ * Serialize a sequence.+ */++static int+yaml_emitter_dump_sequence(yaml_emitter_t *emitter, yaml_node_t *node,+ yaml_char_t *anchor)+{+ yaml_event_t event;+ yaml_mark_t mark = { 0, 0, 0 };++ int implicit = (strcmp((char *)node->tag, YAML_DEFAULT_SEQUENCE_TAG) == 0);++ yaml_node_item_t *item;++ SEQUENCE_START_EVENT_INIT(event, anchor, node->tag, implicit,+ node->data.sequence.style, mark, mark);+ if (!yaml_emitter_emit(emitter, &event)) return 0;++ for (item = node->data.sequence.items.start;+ item < node->data.sequence.items.top; item ++) {+ if (!yaml_emitter_dump_node(emitter, *item)) return 0;+ }++ SEQUENCE_END_EVENT_INIT(event, mark, mark);+ if (!yaml_emitter_emit(emitter, &event)) return 0;++ return 1;+}++/*+ * Serialize a mapping.+ */++static int+yaml_emitter_dump_mapping(yaml_emitter_t *emitter, yaml_node_t *node,+ yaml_char_t *anchor)+{+ yaml_event_t event;+ yaml_mark_t mark = { 0, 0, 0 };++ int implicit = (strcmp((char *)node->tag, YAML_DEFAULT_MAPPING_TAG) == 0);++ yaml_node_pair_t *pair;++ MAPPING_START_EVENT_INIT(event, anchor, node->tag, implicit,+ node->data.mapping.style, mark, mark);+ if (!yaml_emitter_emit(emitter, &event)) return 0;++ for (pair = node->data.mapping.pairs.start;+ pair < node->data.mapping.pairs.top; pair ++) {+ if (!yaml_emitter_dump_node(emitter, pair->key)) return 0;+ if (!yaml_emitter_dump_node(emitter, pair->value)) return 0;+ }++ MAPPING_END_EVENT_INIT(event, mark, mark);+ if (!yaml_emitter_emit(emitter, &event)) return 0;++ return 1;+}+
libyaml/emitter.c view
@@ -1,2297 +1,2297 @@- -#include "yaml_private.h" - -/* - * Flush the buffer if needed. - */ - -#define FLUSH(emitter) \ - ((emitter->buffer.pointer+5 < emitter->buffer.end) \ - || yaml_emitter_flush(emitter)) - -/* - * Put a character to the output buffer. - */ - -#define PUT(emitter,value) \ - (FLUSH(emitter) \ - && (*(emitter->buffer.pointer++) = (yaml_char_t)(value), \ - emitter->column ++, \ - 1)) - -/* - * Put a line break to the output buffer. - */ - -#define PUT_BREAK(emitter) \ - (FLUSH(emitter) \ - && ((emitter->line_break == YAML_CR_BREAK ? \ - (*(emitter->buffer.pointer++) = (yaml_char_t) '\r') : \ - emitter->line_break == YAML_LN_BREAK ? \ - (*(emitter->buffer.pointer++) = (yaml_char_t) '\n') : \ - emitter->line_break == YAML_CRLN_BREAK ? \ - (*(emitter->buffer.pointer++) = (yaml_char_t) '\r', \ - *(emitter->buffer.pointer++) = (yaml_char_t) '\n') : 0), \ - emitter->column = 0, \ - emitter->line ++, \ - 1)) - -/* - * Copy a character from a string into buffer. - */ - -#define WRITE(emitter,string) \ - (FLUSH(emitter) \ - && (COPY(emitter->buffer,string), \ - emitter->column ++, \ - 1)) - -/* - * Copy a line break character from a string into buffer. - */ - -#define WRITE_BREAK(emitter,string) \ - (FLUSH(emitter) \ - && (CHECK(string,'\n') ? \ - (PUT_BREAK(emitter), \ - string.pointer ++, \ - 1) : \ - (COPY(emitter->buffer,string), \ - emitter->column = 0, \ - emitter->line ++, \ - 1))) - -/* - * API functions. - */ - -YAML_DECLARE(int) -yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event); - -/* - * Utility functions. - */ - -static int -yaml_emitter_set_emitter_error(yaml_emitter_t *emitter, const char *problem); - -static int -yaml_emitter_need_more_events(yaml_emitter_t *emitter); - -static int -yaml_emitter_append_tag_directive(yaml_emitter_t *emitter, - yaml_tag_directive_t value, int allow_duplicates); - -static int -yaml_emitter_increase_indent(yaml_emitter_t *emitter, - int flow, int indentless); - -/* - * State functions. - */ - -static int -yaml_emitter_state_machine(yaml_emitter_t *emitter, yaml_event_t *event); - -static int -yaml_emitter_emit_stream_start(yaml_emitter_t *emitter, - yaml_event_t *event); - -static int -yaml_emitter_emit_document_start(yaml_emitter_t *emitter, - yaml_event_t *event, int first); - -static int -yaml_emitter_emit_document_content(yaml_emitter_t *emitter, - yaml_event_t *event); - -static int -yaml_emitter_emit_document_end(yaml_emitter_t *emitter, - yaml_event_t *event); - -static int -yaml_emitter_emit_flow_sequence_item(yaml_emitter_t *emitter, - yaml_event_t *event, int first); - -static int -yaml_emitter_emit_flow_mapping_key(yaml_emitter_t *emitter, - yaml_event_t *event, int first); - -static int -yaml_emitter_emit_flow_mapping_value(yaml_emitter_t *emitter, - yaml_event_t *event, int simple); - -static int -yaml_emitter_emit_block_sequence_item(yaml_emitter_t *emitter, - yaml_event_t *event, int first); - -static int -yaml_emitter_emit_block_mapping_key(yaml_emitter_t *emitter, - yaml_event_t *event, int first); - -static int -yaml_emitter_emit_block_mapping_value(yaml_emitter_t *emitter, - yaml_event_t *event, int simple); - -static int -yaml_emitter_emit_node(yaml_emitter_t *emitter, yaml_event_t *event, - int root, int sequence, int mapping, int simple_key); - -static int -yaml_emitter_emit_alias(yaml_emitter_t *emitter, yaml_event_t *event); - -static int -yaml_emitter_emit_scalar(yaml_emitter_t *emitter, yaml_event_t *event); - -static int -yaml_emitter_emit_sequence_start(yaml_emitter_t *emitter, yaml_event_t *event); - -static int -yaml_emitter_emit_mapping_start(yaml_emitter_t *emitter, yaml_event_t *event); - -/* - * Checkers. - */ - -static int -yaml_emitter_check_empty_document(yaml_emitter_t *emitter); - -static int -yaml_emitter_check_empty_sequence(yaml_emitter_t *emitter); - -static int -yaml_emitter_check_empty_mapping(yaml_emitter_t *emitter); - -static int -yaml_emitter_check_simple_key(yaml_emitter_t *emitter); - -static int -yaml_emitter_select_scalar_style(yaml_emitter_t *emitter, yaml_event_t *event); - -/* - * Processors. - */ - -static int -yaml_emitter_process_anchor(yaml_emitter_t *emitter); - -static int -yaml_emitter_process_tag(yaml_emitter_t *emitter); - -static int -yaml_emitter_process_scalar(yaml_emitter_t *emitter); - -/* - * Analyzers. - */ - -static int -yaml_emitter_analyze_version_directive(yaml_emitter_t *emitter, - yaml_version_directive_t version_directive); - -static int -yaml_emitter_analyze_tag_directive(yaml_emitter_t *emitter, - yaml_tag_directive_t tag_directive); - -static int -yaml_emitter_analyze_anchor(yaml_emitter_t *emitter, - yaml_char_t *anchor, int alias); - -static int -yaml_emitter_analyze_tag(yaml_emitter_t *emitter, - yaml_char_t *tag); - -static int -yaml_emitter_analyze_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length); - -static int -yaml_emitter_analyze_event(yaml_emitter_t *emitter, - yaml_event_t *event); - -/* - * Writers. - */ - -static int -yaml_emitter_write_bom(yaml_emitter_t *emitter); - -static int -yaml_emitter_write_indent(yaml_emitter_t *emitter); - -static int -yaml_emitter_write_indicator(yaml_emitter_t *emitter, - char *indicator, int need_whitespace, - int is_whitespace, int is_indention); - -static int -yaml_emitter_write_anchor(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length); - -static int -yaml_emitter_write_tag_handle(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length); - -static int -yaml_emitter_write_tag_content(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length, int need_whitespace); - -static int -yaml_emitter_write_plain_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length, int allow_breaks); - -static int -yaml_emitter_write_single_quoted_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length, int allow_breaks); - -static int -yaml_emitter_write_double_quoted_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length, int allow_breaks); - -static int -yaml_emitter_write_block_scalar_hints(yaml_emitter_t *emitter, - yaml_string_t string); - -static int -yaml_emitter_write_literal_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length); - -static int -yaml_emitter_write_folded_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length); - -/* - * Set an emitter error and return 0. - */ - -static int -yaml_emitter_set_emitter_error(yaml_emitter_t *emitter, const char *problem) -{ - emitter->error = YAML_EMITTER_ERROR; - emitter->problem = problem; - - return 0; -} - -/* - * Emit an event. - */ - -YAML_DECLARE(int) -yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event) -{ - if (!ENQUEUE(emitter, emitter->events, *event)) { - yaml_event_delete(event); - return 0; - } - - while (!yaml_emitter_need_more_events(emitter)) { - if (!yaml_emitter_analyze_event(emitter, emitter->events.head)) - return 0; - if (!yaml_emitter_state_machine(emitter, emitter->events.head)) - return 0; - yaml_event_delete(&DEQUEUE(emitter, emitter->events)); - } - - return 1; -} - -/* - * Check if we need to accumulate more events before emitting. - * - * We accumulate extra - * - 1 event for DOCUMENT-START - * - 2 events for SEQUENCE-START - * - 3 events for MAPPING-START - */ - -static int -yaml_emitter_need_more_events(yaml_emitter_t *emitter) -{ - int level = 0; - int accumulate = 0; - yaml_event_t *event; - - if (QUEUE_EMPTY(emitter, emitter->events)) - return 1; - - switch (emitter->events.head->type) { - case YAML_DOCUMENT_START_EVENT: - accumulate = 1; - break; - case YAML_SEQUENCE_START_EVENT: - accumulate = 2; - break; - case YAML_MAPPING_START_EVENT: - accumulate = 3; - break; - default: - return 0; - } - - if (emitter->events.tail - emitter->events.head > accumulate) - return 0; - - for (event = emitter->events.head; event != emitter->events.tail; event ++) { - switch (event->type) { - case YAML_STREAM_START_EVENT: - case YAML_DOCUMENT_START_EVENT: - case YAML_SEQUENCE_START_EVENT: - case YAML_MAPPING_START_EVENT: - level += 1; - break; - case YAML_STREAM_END_EVENT: - case YAML_DOCUMENT_END_EVENT: - case YAML_SEQUENCE_END_EVENT: - case YAML_MAPPING_END_EVENT: - level -= 1; - break; - default: - break; - } - if (!level) - return 0; - } - - return 1; -} - -/* - * Append a directive to the directives stack. - */ - -static int -yaml_emitter_append_tag_directive(yaml_emitter_t *emitter, - yaml_tag_directive_t value, int allow_duplicates) -{ - yaml_tag_directive_t *tag_directive; - yaml_tag_directive_t copy = { NULL, NULL }; - - for (tag_directive = emitter->tag_directives.start; - tag_directive != emitter->tag_directives.top; tag_directive ++) { - if (strcmp((char *)value.handle, (char *)tag_directive->handle) == 0) { - if (allow_duplicates) - return 1; - return yaml_emitter_set_emitter_error(emitter, - "duplicate %TAG directive"); - } - } - - copy.handle = yaml_strdup(value.handle); - copy.prefix = yaml_strdup(value.prefix); - if (!copy.handle || !copy.prefix) { - emitter->error = YAML_MEMORY_ERROR; - goto error; - } - - if (!PUSH(emitter, emitter->tag_directives, copy)) - goto error; - - return 1; - -error: - yaml_free(copy.handle); - yaml_free(copy.prefix); - return 0; -} - -/* - * Increase the indentation level. - */ - -static int -yaml_emitter_increase_indent(yaml_emitter_t *emitter, - int flow, int indentless) -{ - if (!PUSH(emitter, emitter->indents, emitter->indent)) - return 0; - - if (emitter->indent < 0) { - emitter->indent = flow ? emitter->best_indent : 0; - } - else if (!indentless) { - emitter->indent += emitter->best_indent; - } - - return 1; -} - -/* - * State dispatcher. - */ - -static int -yaml_emitter_state_machine(yaml_emitter_t *emitter, yaml_event_t *event) -{ - switch (emitter->state) - { - case YAML_EMIT_STREAM_START_STATE: - return yaml_emitter_emit_stream_start(emitter, event); - - case YAML_EMIT_FIRST_DOCUMENT_START_STATE: - return yaml_emitter_emit_document_start(emitter, event, 1); - - case YAML_EMIT_DOCUMENT_START_STATE: - return yaml_emitter_emit_document_start(emitter, event, 0); - - case YAML_EMIT_DOCUMENT_CONTENT_STATE: - return yaml_emitter_emit_document_content(emitter, event); - - case YAML_EMIT_DOCUMENT_END_STATE: - return yaml_emitter_emit_document_end(emitter, event); - - case YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE: - return yaml_emitter_emit_flow_sequence_item(emitter, event, 1); - - case YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE: - return yaml_emitter_emit_flow_sequence_item(emitter, event, 0); - - case YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE: - return yaml_emitter_emit_flow_mapping_key(emitter, event, 1); - - case YAML_EMIT_FLOW_MAPPING_KEY_STATE: - return yaml_emitter_emit_flow_mapping_key(emitter, event, 0); - - case YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE: - return yaml_emitter_emit_flow_mapping_value(emitter, event, 1); - - case YAML_EMIT_FLOW_MAPPING_VALUE_STATE: - return yaml_emitter_emit_flow_mapping_value(emitter, event, 0); - - case YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE: - return yaml_emitter_emit_block_sequence_item(emitter, event, 1); - - case YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE: - return yaml_emitter_emit_block_sequence_item(emitter, event, 0); - - case YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE: - return yaml_emitter_emit_block_mapping_key(emitter, event, 1); - - case YAML_EMIT_BLOCK_MAPPING_KEY_STATE: - return yaml_emitter_emit_block_mapping_key(emitter, event, 0); - - case YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE: - return yaml_emitter_emit_block_mapping_value(emitter, event, 1); - - case YAML_EMIT_BLOCK_MAPPING_VALUE_STATE: - return yaml_emitter_emit_block_mapping_value(emitter, event, 0); - - case YAML_EMIT_END_STATE: - return yaml_emitter_set_emitter_error(emitter, - "expected nothing after STREAM-END"); - - default: - assert(1); /* Invalid state. */ - } - - return 0; -} - -/* - * Expect STREAM-START. - */ - -static int -yaml_emitter_emit_stream_start(yaml_emitter_t *emitter, - yaml_event_t *event) -{ - if (event->type == YAML_STREAM_START_EVENT) - { - if (!emitter->encoding) { - emitter->encoding = event->data.stream_start.encoding; - } - - if (!emitter->encoding) { - emitter->encoding = YAML_UTF8_ENCODING; - } - - if (emitter->best_indent < 2 || emitter->best_indent > 9) { - emitter->best_indent = 2; - } - - if (emitter->best_width >= 0 - && emitter->best_width <= emitter->best_indent*2) { - emitter->best_width = 80; - } - - if (emitter->best_width < 0) { - emitter->best_width = INT_MAX; - } - - if (!emitter->line_break) { - emitter->line_break = YAML_LN_BREAK; - } - - emitter->indent = -1; - - emitter->line = 0; - emitter->column = 0; - emitter->whitespace = 1; - emitter->indention = 1; - - if (emitter->encoding != YAML_UTF8_ENCODING) { - if (!yaml_emitter_write_bom(emitter)) - return 0; - } - - emitter->state = YAML_EMIT_FIRST_DOCUMENT_START_STATE; - - return 1; - } - - return yaml_emitter_set_emitter_error(emitter, - "expected STREAM-START"); -} - -/* - * Expect DOCUMENT-START or STREAM-END. - */ - -static int -yaml_emitter_emit_document_start(yaml_emitter_t *emitter, - yaml_event_t *event, int first) -{ - if (event->type == YAML_DOCUMENT_START_EVENT) - { - yaml_tag_directive_t default_tag_directives[] = { - {(yaml_char_t *)"!", (yaml_char_t *)"!"}, - {(yaml_char_t *)"!!", (yaml_char_t *)"tag:yaml.org,2002:"}, - {NULL, NULL} - }; - yaml_tag_directive_t *tag_directive; - int implicit; - - if (event->data.document_start.version_directive) { - if (!yaml_emitter_analyze_version_directive(emitter, - *event->data.document_start.version_directive)) - return 0; - } - - for (tag_directive = event->data.document_start.tag_directives.start; - tag_directive != event->data.document_start.tag_directives.end; - tag_directive ++) { - if (!yaml_emitter_analyze_tag_directive(emitter, *tag_directive)) - return 0; - if (!yaml_emitter_append_tag_directive(emitter, *tag_directive, 0)) - return 0; - } - - for (tag_directive = default_tag_directives; - tag_directive->handle; tag_directive ++) { - if (!yaml_emitter_append_tag_directive(emitter, *tag_directive, 1)) - return 0; - } - - implicit = event->data.document_start.implicit; - if (!first || emitter->canonical) { - implicit = 0; - } - - if ((event->data.document_start.version_directive || - (event->data.document_start.tag_directives.start - != event->data.document_start.tag_directives.end)) && - emitter->open_ended) - { - if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - - if (event->data.document_start.version_directive) { - implicit = 0; - if (!yaml_emitter_write_indicator(emitter, "%YAML", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_indicator(emitter, "1.1", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - - if (event->data.document_start.tag_directives.start - != event->data.document_start.tag_directives.end) { - implicit = 0; - for (tag_directive = event->data.document_start.tag_directives.start; - tag_directive != event->data.document_start.tag_directives.end; - tag_directive ++) { - if (!yaml_emitter_write_indicator(emitter, "%TAG", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_tag_handle(emitter, tag_directive->handle, - strlen((char *)tag_directive->handle))) - return 0; - if (!yaml_emitter_write_tag_content(emitter, tag_directive->prefix, - strlen((char *)tag_directive->prefix), 1)) - return 0; - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - } - - if (yaml_emitter_check_empty_document(emitter)) { - implicit = 0; - } - - if (!implicit) { - if (!yaml_emitter_write_indent(emitter)) - return 0; - if (!yaml_emitter_write_indicator(emitter, "---", 1, 0, 0)) - return 0; - if (emitter->canonical) { - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - } - - emitter->state = YAML_EMIT_DOCUMENT_CONTENT_STATE; - - return 1; - } - - else if (event->type == YAML_STREAM_END_EVENT) - { - if (emitter->open_ended) - { - if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - - if (!yaml_emitter_flush(emitter)) - return 0; - - emitter->state = YAML_EMIT_END_STATE; - - return 1; - } - - return yaml_emitter_set_emitter_error(emitter, - "expected DOCUMENT-START or STREAM-END"); -} - -/* - * Expect the root node. - */ - -static int -yaml_emitter_emit_document_content(yaml_emitter_t *emitter, - yaml_event_t *event) -{ - if (!PUSH(emitter, emitter->states, YAML_EMIT_DOCUMENT_END_STATE)) - return 0; - - return yaml_emitter_emit_node(emitter, event, 1, 0, 0, 0); -} - -/* - * Expect DOCUMENT-END. - */ - -static int -yaml_emitter_emit_document_end(yaml_emitter_t *emitter, - yaml_event_t *event) -{ - if (event->type == YAML_DOCUMENT_END_EVENT) - { - if (!yaml_emitter_write_indent(emitter)) - return 0; - if (!event->data.document_end.implicit) { - if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - if (!yaml_emitter_flush(emitter)) - return 0; - - emitter->state = YAML_EMIT_DOCUMENT_START_STATE; - - while (!STACK_EMPTY(emitter, emitter->tag_directives)) { - yaml_tag_directive_t tag_directive = POP(emitter, - emitter->tag_directives); - yaml_free(tag_directive.handle); - yaml_free(tag_directive.prefix); - } - - return 1; - } - - return yaml_emitter_set_emitter_error(emitter, - "expected DOCUMENT-END"); -} - -/* - * - * Expect a flow item node. - */ - -static int -yaml_emitter_emit_flow_sequence_item(yaml_emitter_t *emitter, - yaml_event_t *event, int first) -{ - if (first) - { - if (!yaml_emitter_write_indicator(emitter, "[", 1, 1, 0)) - return 0; - if (!yaml_emitter_increase_indent(emitter, 1, 0)) - return 0; - emitter->flow_level ++; - } - - if (event->type == YAML_SEQUENCE_END_EVENT) - { - emitter->flow_level --; - emitter->indent = POP(emitter, emitter->indents); - if (emitter->canonical && !first) { - if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0)) - return 0; - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - if (!yaml_emitter_write_indicator(emitter, "]", 0, 0, 0)) - return 0; - emitter->state = POP(emitter, emitter->states); - - return 1; - } - - if (!first) { - if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0)) - return 0; - } - - if (emitter->canonical || emitter->column > emitter->best_width) { - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - if (!PUSH(emitter, emitter->states, YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE)) - return 0; - - return yaml_emitter_emit_node(emitter, event, 0, 1, 0, 0); -} - -/* - * Expect a flow key node. - */ - -static int -yaml_emitter_emit_flow_mapping_key(yaml_emitter_t *emitter, - yaml_event_t *event, int first) -{ - if (first) - { - if (!yaml_emitter_write_indicator(emitter, "{", 1, 1, 0)) - return 0; - if (!yaml_emitter_increase_indent(emitter, 1, 0)) - return 0; - emitter->flow_level ++; - } - - if (event->type == YAML_MAPPING_END_EVENT) - { - emitter->flow_level --; - emitter->indent = POP(emitter, emitter->indents); - if (emitter->canonical && !first) { - if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0)) - return 0; - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - if (!yaml_emitter_write_indicator(emitter, "}", 0, 0, 0)) - return 0; - emitter->state = POP(emitter, emitter->states); - - return 1; - } - - if (!first) { - if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0)) - return 0; - } - if (emitter->canonical || emitter->column > emitter->best_width) { - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - - if (!emitter->canonical && yaml_emitter_check_simple_key(emitter)) - { - if (!PUSH(emitter, emitter->states, - YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE)) - return 0; - - return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 1); - } - else - { - if (!yaml_emitter_write_indicator(emitter, "?", 1, 0, 0)) - return 0; - if (!PUSH(emitter, emitter->states, - YAML_EMIT_FLOW_MAPPING_VALUE_STATE)) - return 0; - - return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0); - } -} - -/* - * Expect a flow value node. - */ - -static int -yaml_emitter_emit_flow_mapping_value(yaml_emitter_t *emitter, - yaml_event_t *event, int simple) -{ - if (simple) { - if (!yaml_emitter_write_indicator(emitter, ":", 0, 0, 0)) - return 0; - } - else { - if (emitter->canonical || emitter->column > emitter->best_width) { - if (!yaml_emitter_write_indent(emitter)) - return 0; - } - if (!yaml_emitter_write_indicator(emitter, ":", 1, 0, 0)) - return 0; - } - if (!PUSH(emitter, emitter->states, YAML_EMIT_FLOW_MAPPING_KEY_STATE)) - return 0; - return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0); -} - -/* - * Expect a block item node. - */ - -static int -yaml_emitter_emit_block_sequence_item(yaml_emitter_t *emitter, - yaml_event_t *event, int first) -{ - if (first) - { - if (!yaml_emitter_increase_indent(emitter, 0, - (emitter->mapping_context && !emitter->indention))) - return 0; - } - - if (event->type == YAML_SEQUENCE_END_EVENT) - { - emitter->indent = POP(emitter, emitter->indents); - emitter->state = POP(emitter, emitter->states); - - return 1; - } - - if (!yaml_emitter_write_indent(emitter)) - return 0; - if (!yaml_emitter_write_indicator(emitter, "-", 1, 0, 1)) - return 0; - if (!PUSH(emitter, emitter->states, - YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE)) - return 0; - - return yaml_emitter_emit_node(emitter, event, 0, 1, 0, 0); -} - -/* - * Expect a block key node. - */ - -static int -yaml_emitter_emit_block_mapping_key(yaml_emitter_t *emitter, - yaml_event_t *event, int first) -{ - if (first) - { - if (!yaml_emitter_increase_indent(emitter, 0, 0)) - return 0; - } - - if (event->type == YAML_MAPPING_END_EVENT) - { - emitter->indent = POP(emitter, emitter->indents); - emitter->state = POP(emitter, emitter->states); - - return 1; - } - - if (!yaml_emitter_write_indent(emitter)) - return 0; - - if (yaml_emitter_check_simple_key(emitter)) - { - if (!PUSH(emitter, emitter->states, - YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE)) - return 0; - - return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 1); - } - else - { - if (!yaml_emitter_write_indicator(emitter, "?", 1, 0, 1)) - return 0; - if (!PUSH(emitter, emitter->states, - YAML_EMIT_BLOCK_MAPPING_VALUE_STATE)) - return 0; - - return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0); - } -} - -/* - * Expect a block value node. - */ - -static int -yaml_emitter_emit_block_mapping_value(yaml_emitter_t *emitter, - yaml_event_t *event, int simple) -{ - if (simple) { - if (!yaml_emitter_write_indicator(emitter, ":", 0, 0, 0)) - return 0; - } - else { - if (!yaml_emitter_write_indent(emitter)) - return 0; - if (!yaml_emitter_write_indicator(emitter, ":", 1, 0, 1)) - return 0; - } - if (!PUSH(emitter, emitter->states, - YAML_EMIT_BLOCK_MAPPING_KEY_STATE)) - return 0; - - return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0); -} - -/* - * Expect a node. - */ - -static int -yaml_emitter_emit_node(yaml_emitter_t *emitter, yaml_event_t *event, - int root, int sequence, int mapping, int simple_key) -{ - emitter->root_context = root; - emitter->sequence_context = sequence; - emitter->mapping_context = mapping; - emitter->simple_key_context = simple_key; - - switch (event->type) - { - case YAML_ALIAS_EVENT: - return yaml_emitter_emit_alias(emitter, event); - - case YAML_SCALAR_EVENT: - return yaml_emitter_emit_scalar(emitter, event); - - case YAML_SEQUENCE_START_EVENT: - return yaml_emitter_emit_sequence_start(emitter, event); - - case YAML_MAPPING_START_EVENT: - return yaml_emitter_emit_mapping_start(emitter, event); - - default: - return yaml_emitter_set_emitter_error(emitter, - "expected SCALAR, SEQUENCE-START, MAPPING-START, or ALIAS"); - } - - return 0; -} - -/* - * Expect ALIAS. - */ - -static int -yaml_emitter_emit_alias(yaml_emitter_t *emitter, yaml_event_t *event) -{ - if (!yaml_emitter_process_anchor(emitter)) - return 0; - emitter->state = POP(emitter, emitter->states); - - return 1; -} - -/* - * Expect SCALAR. - */ - -static int -yaml_emitter_emit_scalar(yaml_emitter_t *emitter, yaml_event_t *event) -{ - if (!yaml_emitter_select_scalar_style(emitter, event)) - return 0; - if (!yaml_emitter_process_anchor(emitter)) - return 0; - if (!yaml_emitter_process_tag(emitter)) - return 0; - if (!yaml_emitter_increase_indent(emitter, 1, 0)) - return 0; - if (!yaml_emitter_process_scalar(emitter)) - return 0; - emitter->indent = POP(emitter, emitter->indents); - emitter->state = POP(emitter, emitter->states); - - return 1; -} - -/* - * Expect SEQUENCE-START. - */ - -static int -yaml_emitter_emit_sequence_start(yaml_emitter_t *emitter, yaml_event_t *event) -{ - if (!yaml_emitter_process_anchor(emitter)) - return 0; - if (!yaml_emitter_process_tag(emitter)) - return 0; - - if (emitter->flow_level || emitter->canonical - || event->data.sequence_start.style == YAML_FLOW_SEQUENCE_STYLE - || yaml_emitter_check_empty_sequence(emitter)) { - emitter->state = YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE; - } - else { - emitter->state = YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE; - } - - return 1; -} - -/* - * Expect MAPPING-START. - */ - -static int -yaml_emitter_emit_mapping_start(yaml_emitter_t *emitter, yaml_event_t *event) -{ - if (!yaml_emitter_process_anchor(emitter)) - return 0; - if (!yaml_emitter_process_tag(emitter)) - return 0; - - if (emitter->flow_level || emitter->canonical - || event->data.mapping_start.style == YAML_FLOW_MAPPING_STYLE - || yaml_emitter_check_empty_mapping(emitter)) { - emitter->state = YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE; - } - else { - emitter->state = YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE; - } - - return 1; -} - -/* - * Check if the document content is an empty scalar. - */ - -static int -yaml_emitter_check_empty_document(yaml_emitter_t *emitter) -{ - return 0; -} - -/* - * Check if the next events represent an empty sequence. - */ - -static int -yaml_emitter_check_empty_sequence(yaml_emitter_t *emitter) -{ - if (emitter->events.tail - emitter->events.head < 2) - return 0; - - return (emitter->events.head[0].type == YAML_SEQUENCE_START_EVENT - && emitter->events.head[1].type == YAML_SEQUENCE_END_EVENT); -} - -/* - * Check if the next events represent an empty mapping. - */ - -static int -yaml_emitter_check_empty_mapping(yaml_emitter_t *emitter) -{ - if (emitter->events.tail - emitter->events.head < 2) - return 0; - - return (emitter->events.head[0].type == YAML_MAPPING_START_EVENT - && emitter->events.head[1].type == YAML_MAPPING_END_EVENT); -} - -/* - * Check if the next node can be expressed as a simple key. - */ - -static int -yaml_emitter_check_simple_key(yaml_emitter_t *emitter) -{ - yaml_event_t *event = emitter->events.head; - size_t length = 0; - - switch (event->type) - { - case YAML_ALIAS_EVENT: - length += emitter->anchor_data.anchor_length; - break; - - case YAML_SCALAR_EVENT: - if (emitter->scalar_data.multiline) - return 0; - length += emitter->anchor_data.anchor_length - + emitter->tag_data.handle_length - + emitter->tag_data.suffix_length - + emitter->scalar_data.length; - break; - - case YAML_SEQUENCE_START_EVENT: - if (!yaml_emitter_check_empty_sequence(emitter)) - return 0; - length += emitter->anchor_data.anchor_length - + emitter->tag_data.handle_length - + emitter->tag_data.suffix_length; - break; - - case YAML_MAPPING_START_EVENT: - if (!yaml_emitter_check_empty_sequence(emitter)) - return 0; - length += emitter->anchor_data.anchor_length - + emitter->tag_data.handle_length - + emitter->tag_data.suffix_length; - break; - - default: - return 0; - } - - if (length > 128) - return 0; - - return 1; -} - -/* - * Determine an acceptable scalar style. - */ - -static int -yaml_emitter_select_scalar_style(yaml_emitter_t *emitter, yaml_event_t *event) -{ - yaml_scalar_style_t style = event->data.scalar.style; - int no_tag = (!emitter->tag_data.handle && !emitter->tag_data.suffix); - - if (no_tag && !event->data.scalar.plain_implicit - && !event->data.scalar.quoted_implicit) { - return yaml_emitter_set_emitter_error(emitter, - "neither tag nor implicit flags are specified"); - } - - if (style == YAML_ANY_SCALAR_STYLE) - style = YAML_PLAIN_SCALAR_STYLE; - - if (emitter->canonical) - style = YAML_DOUBLE_QUOTED_SCALAR_STYLE; - - if (emitter->simple_key_context && emitter->scalar_data.multiline) - style = YAML_DOUBLE_QUOTED_SCALAR_STYLE; - - if (style == YAML_PLAIN_SCALAR_STYLE) - { - if ((emitter->flow_level && !emitter->scalar_data.flow_plain_allowed) - || (!emitter->flow_level && !emitter->scalar_data.block_plain_allowed)) - style = YAML_SINGLE_QUOTED_SCALAR_STYLE; - if (!emitter->scalar_data.length - && (emitter->flow_level || emitter->simple_key_context)) - style = YAML_SINGLE_QUOTED_SCALAR_STYLE; - if (no_tag && !event->data.scalar.plain_implicit) - style = YAML_SINGLE_QUOTED_SCALAR_STYLE; - } - - if (style == YAML_SINGLE_QUOTED_SCALAR_STYLE) - { - if (!emitter->scalar_data.single_quoted_allowed) - style = YAML_DOUBLE_QUOTED_SCALAR_STYLE; - } - - if (style == YAML_LITERAL_SCALAR_STYLE || style == YAML_FOLDED_SCALAR_STYLE) - { - if (!emitter->scalar_data.block_allowed - || emitter->flow_level || emitter->simple_key_context) - style = YAML_DOUBLE_QUOTED_SCALAR_STYLE; - } - - if (no_tag && !event->data.scalar.quoted_implicit - && style != YAML_PLAIN_SCALAR_STYLE) - { - emitter->tag_data.handle = (yaml_char_t *)"!"; - emitter->tag_data.handle_length = 1; - } - - emitter->scalar_data.style = style; - - return 1; -} - -/* - * Write an achor. - */ - -static int -yaml_emitter_process_anchor(yaml_emitter_t *emitter) -{ - if (!emitter->anchor_data.anchor) - return 1; - - if (!yaml_emitter_write_indicator(emitter, - (emitter->anchor_data.alias ? "*" : "&"), 1, 0, 0)) - return 0; - - return yaml_emitter_write_anchor(emitter, - emitter->anchor_data.anchor, emitter->anchor_data.anchor_length); -} - -/* - * Write a tag. - */ - -static int -yaml_emitter_process_tag(yaml_emitter_t *emitter) -{ - if (!emitter->tag_data.handle && !emitter->tag_data.suffix) - return 1; - - if (emitter->tag_data.handle) - { - if (!yaml_emitter_write_tag_handle(emitter, emitter->tag_data.handle, - emitter->tag_data.handle_length)) - return 0; - if (emitter->tag_data.suffix) { - if (!yaml_emitter_write_tag_content(emitter, emitter->tag_data.suffix, - emitter->tag_data.suffix_length, 0)) - return 0; - } - } - else - { - if (!yaml_emitter_write_indicator(emitter, "!<", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_tag_content(emitter, emitter->tag_data.suffix, - emitter->tag_data.suffix_length, 0)) - return 0; - if (!yaml_emitter_write_indicator(emitter, ">", 0, 0, 0)) - return 0; - } - - return 1; -} - -/* - * Write a scalar. - */ - -static int -yaml_emitter_process_scalar(yaml_emitter_t *emitter) -{ - switch (emitter->scalar_data.style) - { - case YAML_PLAIN_SCALAR_STYLE: - return yaml_emitter_write_plain_scalar(emitter, - emitter->scalar_data.value, emitter->scalar_data.length, - !emitter->simple_key_context); - - case YAML_SINGLE_QUOTED_SCALAR_STYLE: - return yaml_emitter_write_single_quoted_scalar(emitter, - emitter->scalar_data.value, emitter->scalar_data.length, - !emitter->simple_key_context); - - case YAML_DOUBLE_QUOTED_SCALAR_STYLE: - return yaml_emitter_write_double_quoted_scalar(emitter, - emitter->scalar_data.value, emitter->scalar_data.length, - !emitter->simple_key_context); - - case YAML_LITERAL_SCALAR_STYLE: - return yaml_emitter_write_literal_scalar(emitter, - emitter->scalar_data.value, emitter->scalar_data.length); - - case YAML_FOLDED_SCALAR_STYLE: - return yaml_emitter_write_folded_scalar(emitter, - emitter->scalar_data.value, emitter->scalar_data.length); - - default: - assert(1); /* Impossible. */ - } - - return 0; -} - -/* - * Check if a %YAML directive is valid. - */ - -static int -yaml_emitter_analyze_version_directive(yaml_emitter_t *emitter, - yaml_version_directive_t version_directive) -{ - if (version_directive.major != 1 || version_directive.minor != 1) { - return yaml_emitter_set_emitter_error(emitter, - "incompatible %YAML directive"); - } - - return 1; -} - -/* - * Check if a %TAG directive is valid. - */ - -static int -yaml_emitter_analyze_tag_directive(yaml_emitter_t *emitter, - yaml_tag_directive_t tag_directive) -{ - yaml_string_t handle = STRING(tag_directive.handle, - strlen((char *)tag_directive.handle)); - yaml_string_t prefix = STRING(tag_directive.prefix, - strlen((char *)tag_directive.prefix)); - - if (handle.start == handle.end) { - return yaml_emitter_set_emitter_error(emitter, - "tag handle must not be empty"); - } - - if (handle.start[0] != '!') { - return yaml_emitter_set_emitter_error(emitter, - "tag handle must start with '!'"); - } - - if (handle.end[-1] != '!') { - return yaml_emitter_set_emitter_error(emitter, - "tag handle must end with '!'"); - } - - handle.pointer ++; - - while (handle.pointer < handle.end-1) { - if (!IS_ALPHA(handle)) { - return yaml_emitter_set_emitter_error(emitter, - "tag handle must contain alphanumerical characters only"); - } - MOVE(handle); - } - - if (prefix.start == prefix.end) { - return yaml_emitter_set_emitter_error(emitter, - "tag prefix must not be empty"); - } - - return 1; -} - -/* - * Check if an anchor is valid. - */ - -static int -yaml_emitter_analyze_anchor(yaml_emitter_t *emitter, - yaml_char_t *anchor, int alias) -{ - yaml_string_t string = STRING(anchor, strlen((char *)anchor)); - - if (string.start == string.end) { - return yaml_emitter_set_emitter_error(emitter, alias ? - "alias value must not be empty" : - "anchor value must not be empty"); - } - - while (string.pointer != string.end) { - if (!IS_ALPHA(string)) { - return yaml_emitter_set_emitter_error(emitter, alias ? - "alias value must contain alphanumerical characters only" : - "anchor value must contain alphanumerical characters only"); - } - MOVE(string); - } - - emitter->anchor_data.anchor = string.start; - emitter->anchor_data.anchor_length = string.end - string.start; - emitter->anchor_data.alias = alias; - - return 1; -} - -/* - * Check if a tag is valid. - */ - -static int -yaml_emitter_analyze_tag(yaml_emitter_t *emitter, - yaml_char_t *tag) -{ - yaml_string_t string = STRING(tag, strlen((char *)tag)); - yaml_tag_directive_t *tag_directive; - - if (string.start == string.end) { - return yaml_emitter_set_emitter_error(emitter, - "tag value must not be empty"); - } - - for (tag_directive = emitter->tag_directives.start; - tag_directive != emitter->tag_directives.top; tag_directive ++) { - size_t prefix_length = strlen((char *)tag_directive->prefix); - if (prefix_length < (size_t)(string.end - string.start) - && strncmp((char *)tag_directive->prefix, (char *)string.start, - prefix_length) == 0) - { - emitter->tag_data.handle = tag_directive->handle; - emitter->tag_data.handle_length = - strlen((char *)tag_directive->handle); - emitter->tag_data.suffix = string.start + prefix_length; - emitter->tag_data.suffix_length = - (string.end - string.start) - prefix_length; - return 1; - } - } - - emitter->tag_data.suffix = string.start; - emitter->tag_data.suffix_length = string.end - string.start; - - return 1; -} - -/* - * Check if a scalar is valid. - */ - -static int -yaml_emitter_analyze_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length) -{ - yaml_string_t string = STRING(value, length); - - int block_indicators = 0; - int flow_indicators = 0; - int line_breaks = 0; - int special_characters = 0; - - int leading_space = 0; - int leading_break = 0; - int trailing_space = 0; - int trailing_break = 0; - int break_space = 0; - int space_break = 0; - - int preceeded_by_whitespace = 0; - int followed_by_whitespace = 0; - int previous_space = 0; - int previous_break = 0; - - emitter->scalar_data.value = value; - emitter->scalar_data.length = length; - - if (string.start == string.end) - { - emitter->scalar_data.multiline = 0; - emitter->scalar_data.flow_plain_allowed = 0; - emitter->scalar_data.block_plain_allowed = 1; - emitter->scalar_data.single_quoted_allowed = 1; - emitter->scalar_data.block_allowed = 0; - - return 1; - } - - if ((CHECK_AT(string, '-', 0) - && CHECK_AT(string, '-', 1) - && CHECK_AT(string, '-', 2)) - || (CHECK_AT(string, '.', 0) - && CHECK_AT(string, '.', 1) - && CHECK_AT(string, '.', 2))) { - block_indicators = 1; - flow_indicators = 1; - } - - preceeded_by_whitespace = 1; - followed_by_whitespace = IS_BLANKZ_AT(string, WIDTH(string)); - - while (string.pointer != string.end) - { - if (string.start == string.pointer) - { - if (CHECK(string, '#') || CHECK(string, ',') - || CHECK(string, '[') || CHECK(string, ']') - || CHECK(string, '{') || CHECK(string, '}') - || CHECK(string, '&') || CHECK(string, '*') - || CHECK(string, '!') || CHECK(string, '|') - || CHECK(string, '>') || CHECK(string, '\'') - || CHECK(string, '"') || CHECK(string, '%') - || CHECK(string, '@') || CHECK(string, '`')) { - flow_indicators = 1; - block_indicators = 1; - } - - if (CHECK(string, '?') || CHECK(string, ':')) { - flow_indicators = 1; - if (followed_by_whitespace) { - block_indicators = 1; - } - } - - if (CHECK(string, '-') && followed_by_whitespace) { - flow_indicators = 1; - block_indicators = 1; - } - } - else - { - if (CHECK(string, ',') || CHECK(string, '?') - || CHECK(string, '[') || CHECK(string, ']') - || CHECK(string, '{') || CHECK(string, '}')) { - flow_indicators = 1; - } - - if (CHECK(string, ':')) { - flow_indicators = 1; - if (followed_by_whitespace) { - block_indicators = 1; - } - } - - if (CHECK(string, '#') && preceeded_by_whitespace) { - flow_indicators = 1; - block_indicators = 1; - } - } - - if (!IS_PRINTABLE(string) - || (!IS_ASCII(string) && !emitter->unicode)) { - special_characters = 1; - } - - if (IS_BREAK(string)) { - line_breaks = 1; - } - - if (IS_SPACE(string)) - { - if (string.start == string.pointer) { - leading_space = 1; - } - if (string.pointer+WIDTH(string) == string.end) { - trailing_space = 1; - } - if (previous_break) { - break_space = 1; - } - previous_space = 1; - previous_break = 0; - } - else if (IS_BREAK(string)) - { - if (string.start == string.pointer) { - leading_break = 1; - } - if (string.pointer+WIDTH(string) == string.end) { - trailing_break = 1; - } - if (previous_space) { - space_break = 1; - } - previous_space = 0; - previous_break = 1; - } - else - { - previous_space = 0; - previous_break = 0; - } - - preceeded_by_whitespace = IS_BLANKZ(string); - MOVE(string); - if (string.pointer != string.end) { - followed_by_whitespace = IS_BLANKZ_AT(string, WIDTH(string)); - } - } - - emitter->scalar_data.multiline = line_breaks; - - emitter->scalar_data.flow_plain_allowed = 1; - emitter->scalar_data.block_plain_allowed = 1; - emitter->scalar_data.single_quoted_allowed = 1; - emitter->scalar_data.block_allowed = 1; - - if (leading_space || leading_break || trailing_space || trailing_break) { - emitter->scalar_data.flow_plain_allowed = 0; - emitter->scalar_data.block_plain_allowed = 0; - } - - if (trailing_space) { - emitter->scalar_data.block_allowed = 0; - } - - if (break_space) { - emitter->scalar_data.flow_plain_allowed = 0; - emitter->scalar_data.block_plain_allowed = 0; - emitter->scalar_data.single_quoted_allowed = 0; - } - - if (space_break || special_characters) { - emitter->scalar_data.flow_plain_allowed = 0; - emitter->scalar_data.block_plain_allowed = 0; - emitter->scalar_data.single_quoted_allowed = 0; - emitter->scalar_data.block_allowed = 0; - } - - if (line_breaks) { - emitter->scalar_data.flow_plain_allowed = 0; - emitter->scalar_data.block_plain_allowed = 0; - } - - if (flow_indicators) { - emitter->scalar_data.flow_plain_allowed = 0; - } - - if (block_indicators) { - emitter->scalar_data.block_plain_allowed = 0; - } - - return 1; -} - -/* - * Check if the event data is valid. - */ - -static int -yaml_emitter_analyze_event(yaml_emitter_t *emitter, - yaml_event_t *event) -{ - emitter->anchor_data.anchor = NULL; - emitter->anchor_data.anchor_length = 0; - emitter->tag_data.handle = NULL; - emitter->tag_data.handle_length = 0; - emitter->tag_data.suffix = NULL; - emitter->tag_data.suffix_length = 0; - emitter->scalar_data.value = NULL; - emitter->scalar_data.length = 0; - - switch (event->type) - { - case YAML_ALIAS_EVENT: - if (!yaml_emitter_analyze_anchor(emitter, - event->data.alias.anchor, 1)) - return 0; - return 1; - - case YAML_SCALAR_EVENT: - if (event->data.scalar.anchor) { - if (!yaml_emitter_analyze_anchor(emitter, - event->data.scalar.anchor, 0)) - return 0; - } - if (event->data.scalar.tag && (emitter->canonical || - (!event->data.scalar.plain_implicit - && !event->data.scalar.quoted_implicit))) { - if (!yaml_emitter_analyze_tag(emitter, event->data.scalar.tag)) - return 0; - } - if (!yaml_emitter_analyze_scalar(emitter, - event->data.scalar.value, event->data.scalar.length)) - return 0; - return 1; - - case YAML_SEQUENCE_START_EVENT: - if (event->data.sequence_start.anchor) { - if (!yaml_emitter_analyze_anchor(emitter, - event->data.sequence_start.anchor, 0)) - return 0; - } - if (event->data.sequence_start.tag && (emitter->canonical || - !event->data.sequence_start.implicit)) { - if (!yaml_emitter_analyze_tag(emitter, - event->data.sequence_start.tag)) - return 0; - } - return 1; - - case YAML_MAPPING_START_EVENT: - if (event->data.mapping_start.anchor) { - if (!yaml_emitter_analyze_anchor(emitter, - event->data.mapping_start.anchor, 0)) - return 0; - } - if (event->data.mapping_start.tag && (emitter->canonical || - !event->data.mapping_start.implicit)) { - if (!yaml_emitter_analyze_tag(emitter, - event->data.mapping_start.tag)) - return 0; - } - return 1; - - default: - return 1; - } -} - -/* - * Write the BOM character. - */ - -static int -yaml_emitter_write_bom(yaml_emitter_t *emitter) -{ - if (!FLUSH(emitter)) return 0; - - *(emitter->buffer.pointer++) = (yaml_char_t) '\xEF'; - *(emitter->buffer.pointer++) = (yaml_char_t) '\xBB'; - *(emitter->buffer.pointer++) = (yaml_char_t) '\xBF'; - - return 1; -} - -static int -yaml_emitter_write_indent(yaml_emitter_t *emitter) -{ - int indent = (emitter->indent >= 0) ? emitter->indent : 0; - - if (!emitter->indention || emitter->column > indent - || (emitter->column == indent && !emitter->whitespace)) { - if (!PUT_BREAK(emitter)) return 0; - } - - while (emitter->column < indent) { - if (!PUT(emitter, ' ')) return 0; - } - - emitter->whitespace = 1; - emitter->indention = 1; - - return 1; -} - -static int -yaml_emitter_write_indicator(yaml_emitter_t *emitter, - char *indicator, int need_whitespace, - int is_whitespace, int is_indention) -{ - yaml_string_t string = STRING((yaml_char_t *)indicator, strlen(indicator)); - - if (need_whitespace && !emitter->whitespace) { - if (!PUT(emitter, ' ')) return 0; - } - - while (string.pointer != string.end) { - if (!WRITE(emitter, string)) return 0; - } - - emitter->whitespace = is_whitespace; - emitter->indention = (emitter->indention && is_indention); - emitter->open_ended = 0; - - return 1; -} - -static int -yaml_emitter_write_anchor(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length) -{ - yaml_string_t string = STRING(value, length); - - while (string.pointer != string.end) { - if (!WRITE(emitter, string)) return 0; - } - - emitter->whitespace = 0; - emitter->indention = 0; - - return 1; -} - -static int -yaml_emitter_write_tag_handle(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length) -{ - yaml_string_t string = STRING(value, length); - - if (!emitter->whitespace) { - if (!PUT(emitter, ' ')) return 0; - } - - while (string.pointer != string.end) { - if (!WRITE(emitter, string)) return 0; - } - - emitter->whitespace = 0; - emitter->indention = 0; - - return 1; -} - -static int -yaml_emitter_write_tag_content(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length, - int need_whitespace) -{ - yaml_string_t string = STRING(value, length); - - if (need_whitespace && !emitter->whitespace) { - if (!PUT(emitter, ' ')) return 0; - } - - while (string.pointer != string.end) { - if (IS_ALPHA(string) - || CHECK(string, ';') || CHECK(string, '/') - || CHECK(string, '?') || CHECK(string, ':') - || CHECK(string, '@') || CHECK(string, '&') - || CHECK(string, '=') || CHECK(string, '+') - || CHECK(string, '$') || CHECK(string, ',') - || CHECK(string, '_') || CHECK(string, '.') - || CHECK(string, '~') || CHECK(string, '*') - || CHECK(string, '\'') || CHECK(string, '(') - || CHECK(string, ')') || CHECK(string, '[') - || CHECK(string, ']')) { - if (!WRITE(emitter, string)) return 0; - } - else { - int width = WIDTH(string); - unsigned int value; - while (width --) { - value = *(string.pointer++); - if (!PUT(emitter, '%')) return 0; - if (!PUT(emitter, (value >> 4) - + ((value >> 4) < 10 ? '0' : 'A' - 10))) - return 0; - if (!PUT(emitter, (value & 0x0F) - + ((value & 0x0F) < 10 ? '0' : 'A' - 10))) - return 0; - } - } - } - - emitter->whitespace = 0; - emitter->indention = 0; - - return 1; -} - -static int -yaml_emitter_write_plain_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length, int allow_breaks) -{ - yaml_string_t string = STRING(value, length); - int spaces = 0; - int breaks = 0; - - if (!emitter->whitespace) { - if (!PUT(emitter, ' ')) return 0; - } - - while (string.pointer != string.end) - { - if (IS_SPACE(string)) - { - if (allow_breaks && !spaces - && emitter->column > emitter->best_width - && !IS_SPACE_AT(string, 1)) { - if (!yaml_emitter_write_indent(emitter)) return 0; - MOVE(string); - } - else { - if (!WRITE(emitter, string)) return 0; - } - spaces = 1; - } - else if (IS_BREAK(string)) - { - if (!breaks && CHECK(string, '\n')) { - if (!PUT_BREAK(emitter)) return 0; - } - if (!WRITE_BREAK(emitter, string)) return 0; - emitter->indention = 1; - breaks = 1; - } - else - { - if (breaks) { - if (!yaml_emitter_write_indent(emitter)) return 0; - } - if (!WRITE(emitter, string)) return 0; - emitter->indention = 0; - spaces = 0; - breaks = 0; - } - } - - emitter->whitespace = 0; - emitter->indention = 0; - if (emitter->root_context) - { - emitter->open_ended = 1; - } - - return 1; -} - -static int -yaml_emitter_write_single_quoted_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length, int allow_breaks) -{ - yaml_string_t string = STRING(value, length); - int spaces = 0; - int breaks = 0; - - if (!yaml_emitter_write_indicator(emitter, "'", 1, 0, 0)) - return 0; - - while (string.pointer != string.end) - { - if (IS_SPACE(string)) - { - if (allow_breaks && !spaces - && emitter->column > emitter->best_width - && string.pointer != string.start - && string.pointer != string.end - 1 - && !IS_SPACE_AT(string, 1)) { - if (!yaml_emitter_write_indent(emitter)) return 0; - MOVE(string); - } - else { - if (!WRITE(emitter, string)) return 0; - } - spaces = 1; - } - else if (IS_BREAK(string)) - { - if (!breaks && CHECK(string, '\n')) { - if (!PUT_BREAK(emitter)) return 0; - } - if (!WRITE_BREAK(emitter, string)) return 0; - emitter->indention = 1; - breaks = 1; - } - else - { - if (breaks) { - if (!yaml_emitter_write_indent(emitter)) return 0; - } - if (CHECK(string, '\'')) { - if (!PUT(emitter, '\'')) return 0; - } - if (!WRITE(emitter, string)) return 0; - emitter->indention = 0; - spaces = 0; - breaks = 0; - } - } - - if (!yaml_emitter_write_indicator(emitter, "'", 0, 0, 0)) - return 0; - - emitter->whitespace = 0; - emitter->indention = 0; - - return 1; -} - -static int -yaml_emitter_write_double_quoted_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length, int allow_breaks) -{ - yaml_string_t string = STRING(value, length); - int spaces = 0; - - if (!yaml_emitter_write_indicator(emitter, "\"", 1, 0, 0)) - return 0; - - while (string.pointer != string.end) - { - if (!IS_PRINTABLE(string) || (!emitter->unicode && !IS_ASCII(string)) - || IS_BOM(string) || IS_BREAK(string) - || CHECK(string, '"') || CHECK(string, '\\')) - { - unsigned char octet; - unsigned int width; - unsigned int value; - int k; - - octet = string.pointer[0]; - width = (octet & 0x80) == 0x00 ? 1 : - (octet & 0xE0) == 0xC0 ? 2 : - (octet & 0xF0) == 0xE0 ? 3 : - (octet & 0xF8) == 0xF0 ? 4 : 0; - value = (octet & 0x80) == 0x00 ? octet & 0x7F : - (octet & 0xE0) == 0xC0 ? octet & 0x1F : - (octet & 0xF0) == 0xE0 ? octet & 0x0F : - (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0; - for (k = 1; k < (int)width; k ++) { - octet = string.pointer[k]; - value = (value << 6) + (octet & 0x3F); - } - string.pointer += width; - - if (!PUT(emitter, '\\')) return 0; - - switch (value) - { - case 0x00: - if (!PUT(emitter, '0')) return 0; - break; - - case 0x07: - if (!PUT(emitter, 'a')) return 0; - break; - - case 0x08: - if (!PUT(emitter, 'b')) return 0; - break; - - case 0x09: - if (!PUT(emitter, 't')) return 0; - break; - - case 0x0A: - if (!PUT(emitter, 'n')) return 0; - break; - - case 0x0B: - if (!PUT(emitter, 'v')) return 0; - break; - - case 0x0C: - if (!PUT(emitter, 'f')) return 0; - break; - - case 0x0D: - if (!PUT(emitter, 'r')) return 0; - break; - - case 0x1B: - if (!PUT(emitter, 'e')) return 0; - break; - - case 0x22: - if (!PUT(emitter, '\"')) return 0; - break; - - case 0x5C: - if (!PUT(emitter, '\\')) return 0; - break; - - case 0x85: - if (!PUT(emitter, 'N')) return 0; - break; - - case 0xA0: - if (!PUT(emitter, '_')) return 0; - break; - - case 0x2028: - if (!PUT(emitter, 'L')) return 0; - break; - - case 0x2029: - if (!PUT(emitter, 'P')) return 0; - break; - - default: - if (value <= 0xFF) { - if (!PUT(emitter, 'x')) return 0; - width = 2; - } - else if (value <= 0xFFFF) { - if (!PUT(emitter, 'u')) return 0; - width = 4; - } - else { - if (!PUT(emitter, 'U')) return 0; - width = 8; - } - for (k = (width-1)*4; k >= 0; k -= 4) { - int digit = (value >> k) & 0x0F; - if (!PUT(emitter, digit + (digit < 10 ? '0' : 'A'-10))) - return 0; - } - } - spaces = 0; - } - else if (IS_SPACE(string)) - { - if (allow_breaks && !spaces - && emitter->column > emitter->best_width - && string.pointer != string.start - && string.pointer != string.end - 1) { - if (!yaml_emitter_write_indent(emitter)) return 0; - if (IS_SPACE_AT(string, 1)) { - if (!PUT(emitter, '\\')) return 0; - } - MOVE(string); - } - else { - if (!WRITE(emitter, string)) return 0; - } - spaces = 1; - } - else - { - if (!WRITE(emitter, string)) return 0; - spaces = 0; - } - } - - if (!yaml_emitter_write_indicator(emitter, "\"", 0, 0, 0)) - return 0; - - emitter->whitespace = 0; - emitter->indention = 0; - - return 1; -} - -static int -yaml_emitter_write_block_scalar_hints(yaml_emitter_t *emitter, - yaml_string_t string) -{ - char indent_hint[2]; - char *chomp_hint = NULL; - - if (IS_SPACE(string) || IS_BREAK(string)) - { - indent_hint[0] = '0' + (char)emitter->best_indent; - indent_hint[1] = '\0'; - if (!yaml_emitter_write_indicator(emitter, indent_hint, 0, 0, 0)) - return 0; - } - - emitter->open_ended = 0; - - string.pointer = string.end; - if (string.start == string.pointer) - { - chomp_hint = "-"; - } - else - { - do { - string.pointer --; - } while ((*string.pointer & 0xC0) == 0x80); - if (!IS_BREAK(string)) - { - chomp_hint = "-"; - } - else if (string.start == string.pointer) - { - chomp_hint = "+"; - emitter->open_ended = 1; - } - else - { - do { - string.pointer --; - } while ((*string.pointer & 0xC0) == 0x80); - if (IS_BREAK(string)) - { - chomp_hint = "+"; - emitter->open_ended = 1; - } - } - } - - if (chomp_hint) - { - if (!yaml_emitter_write_indicator(emitter, chomp_hint, 0, 0, 0)) - return 0; - } - - return 1; -} - -static int -yaml_emitter_write_literal_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length) -{ - yaml_string_t string = STRING(value, length); - int breaks = 1; - - if (!yaml_emitter_write_indicator(emitter, "|", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_block_scalar_hints(emitter, string)) - return 0; - if (!PUT_BREAK(emitter)) return 0; - emitter->indention = 1; - emitter->whitespace = 1; - - while (string.pointer != string.end) - { - if (IS_BREAK(string)) - { - if (!WRITE_BREAK(emitter, string)) return 0; - emitter->indention = 1; - breaks = 1; - } - else - { - if (breaks) { - if (!yaml_emitter_write_indent(emitter)) return 0; - } - if (!WRITE(emitter, string)) return 0; - emitter->indention = 0; - breaks = 0; - } - } - - return 1; -} - -static int -yaml_emitter_write_folded_scalar(yaml_emitter_t *emitter, - yaml_char_t *value, size_t length) -{ - yaml_string_t string = STRING(value, length); - int breaks = 1; - int leading_spaces = 1; - - if (!yaml_emitter_write_indicator(emitter, ">", 1, 0, 0)) - return 0; - if (!yaml_emitter_write_block_scalar_hints(emitter, string)) - return 0; - if (!PUT_BREAK(emitter)) return 0; - emitter->indention = 1; - emitter->whitespace = 1; - - while (string.pointer != string.end) - { - if (IS_BREAK(string)) - { - if (!breaks && !leading_spaces && CHECK(string, '\n')) { - int k = 0; - while (IS_BREAK_AT(string, k)) { - k += WIDTH_AT(string, k); - } - if (!IS_BLANKZ_AT(string, k)) { - if (!PUT_BREAK(emitter)) return 0; - } - } - if (!WRITE_BREAK(emitter, string)) return 0; - emitter->indention = 1; - breaks = 1; - } - else - { - if (breaks) { - if (!yaml_emitter_write_indent(emitter)) return 0; - leading_spaces = IS_BLANK(string); - } - if (!breaks && IS_SPACE(string) && !IS_SPACE_AT(string, 1) - && emitter->column > emitter->best_width) { - if (!yaml_emitter_write_indent(emitter)) return 0; - MOVE(string); - } - else { - if (!WRITE(emitter, string)) return 0; - } - emitter->indention = 0; - breaks = 0; - } - } - - return 1; -} - ++#include "yaml_private.h"++/*+ * Flush the buffer if needed.+ */++#define FLUSH(emitter) \+ ((emitter->buffer.pointer+5 < emitter->buffer.end) \+ || yaml_emitter_flush(emitter))++/*+ * Put a character to the output buffer.+ */++#define PUT(emitter,value) \+ (FLUSH(emitter) \+ && (*(emitter->buffer.pointer++) = (yaml_char_t)(value), \+ emitter->column ++, \+ 1))++/*+ * Put a line break to the output buffer.+ */++#define PUT_BREAK(emitter) \+ (FLUSH(emitter) \+ && ((emitter->line_break == YAML_CR_BREAK ? \+ (*(emitter->buffer.pointer++) = (yaml_char_t) '\r') : \+ emitter->line_break == YAML_LN_BREAK ? \+ (*(emitter->buffer.pointer++) = (yaml_char_t) '\n') : \+ emitter->line_break == YAML_CRLN_BREAK ? \+ (*(emitter->buffer.pointer++) = (yaml_char_t) '\r', \+ *(emitter->buffer.pointer++) = (yaml_char_t) '\n') : 0), \+ emitter->column = 0, \+ emitter->line ++, \+ 1))++/*+ * Copy a character from a string into buffer.+ */++#define WRITE(emitter,string) \+ (FLUSH(emitter) \+ && (COPY(emitter->buffer,string), \+ emitter->column ++, \+ 1))++/*+ * Copy a line break character from a string into buffer.+ */++#define WRITE_BREAK(emitter,string) \+ (FLUSH(emitter) \+ && (CHECK(string,'\n') ? \+ (PUT_BREAK(emitter), \+ string.pointer ++, \+ 1) : \+ (COPY(emitter->buffer,string), \+ emitter->column = 0, \+ emitter->line ++, \+ 1)))++/*+ * API functions.+ */++YAML_DECLARE(int)+yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event);++/*+ * Utility functions.+ */++static int+yaml_emitter_set_emitter_error(yaml_emitter_t *emitter, const char *problem);++static int+yaml_emitter_need_more_events(yaml_emitter_t *emitter);++static int+yaml_emitter_append_tag_directive(yaml_emitter_t *emitter,+ yaml_tag_directive_t value, int allow_duplicates);++static int+yaml_emitter_increase_indent(yaml_emitter_t *emitter,+ int flow, int indentless);++/*+ * State functions.+ */++static int+yaml_emitter_state_machine(yaml_emitter_t *emitter, yaml_event_t *event);++static int+yaml_emitter_emit_stream_start(yaml_emitter_t *emitter,+ yaml_event_t *event);++static int+yaml_emitter_emit_document_start(yaml_emitter_t *emitter,+ yaml_event_t *event, int first);++static int+yaml_emitter_emit_document_content(yaml_emitter_t *emitter,+ yaml_event_t *event);++static int+yaml_emitter_emit_document_end(yaml_emitter_t *emitter,+ yaml_event_t *event);++static int+yaml_emitter_emit_flow_sequence_item(yaml_emitter_t *emitter,+ yaml_event_t *event, int first);++static int+yaml_emitter_emit_flow_mapping_key(yaml_emitter_t *emitter,+ yaml_event_t *event, int first);++static int+yaml_emitter_emit_flow_mapping_value(yaml_emitter_t *emitter,+ yaml_event_t *event, int simple);++static int+yaml_emitter_emit_block_sequence_item(yaml_emitter_t *emitter,+ yaml_event_t *event, int first);++static int+yaml_emitter_emit_block_mapping_key(yaml_emitter_t *emitter,+ yaml_event_t *event, int first);++static int+yaml_emitter_emit_block_mapping_value(yaml_emitter_t *emitter,+ yaml_event_t *event, int simple);++static int+yaml_emitter_emit_node(yaml_emitter_t *emitter, yaml_event_t *event,+ int root, int sequence, int mapping, int simple_key);++static int+yaml_emitter_emit_alias(yaml_emitter_t *emitter, yaml_event_t *event);++static int+yaml_emitter_emit_scalar(yaml_emitter_t *emitter, yaml_event_t *event);++static int+yaml_emitter_emit_sequence_start(yaml_emitter_t *emitter, yaml_event_t *event);++static int+yaml_emitter_emit_mapping_start(yaml_emitter_t *emitter, yaml_event_t *event);++/*+ * Checkers.+ */++static int+yaml_emitter_check_empty_document(yaml_emitter_t *emitter);++static int+yaml_emitter_check_empty_sequence(yaml_emitter_t *emitter);++static int+yaml_emitter_check_empty_mapping(yaml_emitter_t *emitter);++static int+yaml_emitter_check_simple_key(yaml_emitter_t *emitter);++static int+yaml_emitter_select_scalar_style(yaml_emitter_t *emitter, yaml_event_t *event);++/*+ * Processors.+ */++static int+yaml_emitter_process_anchor(yaml_emitter_t *emitter);++static int+yaml_emitter_process_tag(yaml_emitter_t *emitter);++static int+yaml_emitter_process_scalar(yaml_emitter_t *emitter);++/*+ * Analyzers.+ */++static int+yaml_emitter_analyze_version_directive(yaml_emitter_t *emitter,+ yaml_version_directive_t version_directive);++static int+yaml_emitter_analyze_tag_directive(yaml_emitter_t *emitter,+ yaml_tag_directive_t tag_directive);++static int+yaml_emitter_analyze_anchor(yaml_emitter_t *emitter,+ yaml_char_t *anchor, int alias);++static int+yaml_emitter_analyze_tag(yaml_emitter_t *emitter,+ yaml_char_t *tag);++static int+yaml_emitter_analyze_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length);++static int+yaml_emitter_analyze_event(yaml_emitter_t *emitter,+ yaml_event_t *event);++/*+ * Writers.+ */++static int+yaml_emitter_write_bom(yaml_emitter_t *emitter);++static int+yaml_emitter_write_indent(yaml_emitter_t *emitter);++static int+yaml_emitter_write_indicator(yaml_emitter_t *emitter,+ char *indicator, int need_whitespace,+ int is_whitespace, int is_indention);++static int+yaml_emitter_write_anchor(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length);++static int+yaml_emitter_write_tag_handle(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length);++static int+yaml_emitter_write_tag_content(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length, int need_whitespace);++static int+yaml_emitter_write_plain_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length, int allow_breaks);++static int+yaml_emitter_write_single_quoted_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length, int allow_breaks);++static int+yaml_emitter_write_double_quoted_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length, int allow_breaks);++static int+yaml_emitter_write_block_scalar_hints(yaml_emitter_t *emitter,+ yaml_string_t string);++static int+yaml_emitter_write_literal_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length);++static int+yaml_emitter_write_folded_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length);++/*+ * Set an emitter error and return 0.+ */++static int+yaml_emitter_set_emitter_error(yaml_emitter_t *emitter, const char *problem)+{+ emitter->error = YAML_EMITTER_ERROR;+ emitter->problem = problem;++ return 0;+}++/*+ * Emit an event.+ */++YAML_DECLARE(int)+yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event)+{+ if (!ENQUEUE(emitter, emitter->events, *event)) {+ yaml_event_delete(event);+ return 0;+ }++ while (!yaml_emitter_need_more_events(emitter)) {+ if (!yaml_emitter_analyze_event(emitter, emitter->events.head))+ return 0;+ if (!yaml_emitter_state_machine(emitter, emitter->events.head))+ return 0;+ yaml_event_delete(&DEQUEUE(emitter, emitter->events));+ }++ return 1;+}++/*+ * Check if we need to accumulate more events before emitting.+ *+ * We accumulate extra+ * - 1 event for DOCUMENT-START+ * - 2 events for SEQUENCE-START+ * - 3 events for MAPPING-START+ */++static int+yaml_emitter_need_more_events(yaml_emitter_t *emitter)+{+ int level = 0;+ int accumulate = 0;+ yaml_event_t *event;++ if (QUEUE_EMPTY(emitter, emitter->events))+ return 1;++ switch (emitter->events.head->type) {+ case YAML_DOCUMENT_START_EVENT:+ accumulate = 1;+ break;+ case YAML_SEQUENCE_START_EVENT:+ accumulate = 2;+ break;+ case YAML_MAPPING_START_EVENT:+ accumulate = 3;+ break;+ default:+ return 0;+ }++ if (emitter->events.tail - emitter->events.head > accumulate)+ return 0;++ for (event = emitter->events.head; event != emitter->events.tail; event ++) {+ switch (event->type) {+ case YAML_STREAM_START_EVENT:+ case YAML_DOCUMENT_START_EVENT:+ case YAML_SEQUENCE_START_EVENT:+ case YAML_MAPPING_START_EVENT:+ level += 1;+ break;+ case YAML_STREAM_END_EVENT:+ case YAML_DOCUMENT_END_EVENT:+ case YAML_SEQUENCE_END_EVENT:+ case YAML_MAPPING_END_EVENT:+ level -= 1;+ break;+ default:+ break;+ }+ if (!level)+ return 0;+ }++ return 1;+}++/*+ * Append a directive to the directives stack.+ */++static int+yaml_emitter_append_tag_directive(yaml_emitter_t *emitter,+ yaml_tag_directive_t value, int allow_duplicates)+{+ yaml_tag_directive_t *tag_directive;+ yaml_tag_directive_t copy = { NULL, NULL };++ for (tag_directive = emitter->tag_directives.start;+ tag_directive != emitter->tag_directives.top; tag_directive ++) {+ if (strcmp((char *)value.handle, (char *)tag_directive->handle) == 0) {+ if (allow_duplicates)+ return 1;+ return yaml_emitter_set_emitter_error(emitter,+ "duplicate %TAG directive");+ }+ }++ copy.handle = yaml_strdup(value.handle);+ copy.prefix = yaml_strdup(value.prefix);+ if (!copy.handle || !copy.prefix) {+ emitter->error = YAML_MEMORY_ERROR;+ goto error;+ }++ if (!PUSH(emitter, emitter->tag_directives, copy))+ goto error;++ return 1;++error:+ yaml_free(copy.handle);+ yaml_free(copy.prefix);+ return 0;+}++/*+ * Increase the indentation level.+ */++static int+yaml_emitter_increase_indent(yaml_emitter_t *emitter,+ int flow, int indentless)+{+ if (!PUSH(emitter, emitter->indents, emitter->indent))+ return 0;++ if (emitter->indent < 0) {+ emitter->indent = flow ? emitter->best_indent : 0;+ }+ else if (!indentless) {+ emitter->indent += emitter->best_indent;+ }++ return 1;+}++/*+ * State dispatcher.+ */++static int+yaml_emitter_state_machine(yaml_emitter_t *emitter, yaml_event_t *event)+{+ switch (emitter->state)+ {+ case YAML_EMIT_STREAM_START_STATE:+ return yaml_emitter_emit_stream_start(emitter, event);++ case YAML_EMIT_FIRST_DOCUMENT_START_STATE:+ return yaml_emitter_emit_document_start(emitter, event, 1);++ case YAML_EMIT_DOCUMENT_START_STATE:+ return yaml_emitter_emit_document_start(emitter, event, 0);++ case YAML_EMIT_DOCUMENT_CONTENT_STATE:+ return yaml_emitter_emit_document_content(emitter, event);++ case YAML_EMIT_DOCUMENT_END_STATE:+ return yaml_emitter_emit_document_end(emitter, event);++ case YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE:+ return yaml_emitter_emit_flow_sequence_item(emitter, event, 1);++ case YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE:+ return yaml_emitter_emit_flow_sequence_item(emitter, event, 0);++ case YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE:+ return yaml_emitter_emit_flow_mapping_key(emitter, event, 1);++ case YAML_EMIT_FLOW_MAPPING_KEY_STATE:+ return yaml_emitter_emit_flow_mapping_key(emitter, event, 0);++ case YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE:+ return yaml_emitter_emit_flow_mapping_value(emitter, event, 1);++ case YAML_EMIT_FLOW_MAPPING_VALUE_STATE:+ return yaml_emitter_emit_flow_mapping_value(emitter, event, 0);++ case YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE:+ return yaml_emitter_emit_block_sequence_item(emitter, event, 1);++ case YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE:+ return yaml_emitter_emit_block_sequence_item(emitter, event, 0);++ case YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE:+ return yaml_emitter_emit_block_mapping_key(emitter, event, 1);++ case YAML_EMIT_BLOCK_MAPPING_KEY_STATE:+ return yaml_emitter_emit_block_mapping_key(emitter, event, 0);++ case YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE:+ return yaml_emitter_emit_block_mapping_value(emitter, event, 1);++ case YAML_EMIT_BLOCK_MAPPING_VALUE_STATE:+ return yaml_emitter_emit_block_mapping_value(emitter, event, 0);++ case YAML_EMIT_END_STATE:+ return yaml_emitter_set_emitter_error(emitter,+ "expected nothing after STREAM-END");++ default:+ assert(1); /* Invalid state. */+ }++ return 0;+}++/*+ * Expect STREAM-START.+ */++static int+yaml_emitter_emit_stream_start(yaml_emitter_t *emitter,+ yaml_event_t *event)+{+ if (event->type == YAML_STREAM_START_EVENT)+ {+ if (!emitter->encoding) {+ emitter->encoding = event->data.stream_start.encoding;+ }++ if (!emitter->encoding) {+ emitter->encoding = YAML_UTF8_ENCODING;+ }++ if (emitter->best_indent < 2 || emitter->best_indent > 9) {+ emitter->best_indent = 2;+ }++ if (emitter->best_width >= 0+ && emitter->best_width <= emitter->best_indent*2) {+ emitter->best_width = 80;+ }++ if (emitter->best_width < 0) {+ emitter->best_width = INT_MAX;+ }+ + if (!emitter->line_break) {+ emitter->line_break = YAML_LN_BREAK;+ }++ emitter->indent = -1;++ emitter->line = 0;+ emitter->column = 0;+ emitter->whitespace = 1;+ emitter->indention = 1;++ if (emitter->encoding != YAML_UTF8_ENCODING) {+ if (!yaml_emitter_write_bom(emitter))+ return 0;+ }++ emitter->state = YAML_EMIT_FIRST_DOCUMENT_START_STATE;++ return 1;+ }++ return yaml_emitter_set_emitter_error(emitter,+ "expected STREAM-START");+}++/*+ * Expect DOCUMENT-START or STREAM-END.+ */++static int+yaml_emitter_emit_document_start(yaml_emitter_t *emitter,+ yaml_event_t *event, int first)+{+ if (event->type == YAML_DOCUMENT_START_EVENT)+ {+ yaml_tag_directive_t default_tag_directives[] = {+ {(yaml_char_t *)"!", (yaml_char_t *)"!"},+ {(yaml_char_t *)"!!", (yaml_char_t *)"tag:yaml.org,2002:"},+ {NULL, NULL}+ };+ yaml_tag_directive_t *tag_directive;+ int implicit;++ if (event->data.document_start.version_directive) {+ if (!yaml_emitter_analyze_version_directive(emitter,+ *event->data.document_start.version_directive))+ return 0;+ }++ for (tag_directive = event->data.document_start.tag_directives.start;+ tag_directive != event->data.document_start.tag_directives.end;+ tag_directive ++) {+ if (!yaml_emitter_analyze_tag_directive(emitter, *tag_directive))+ return 0;+ if (!yaml_emitter_append_tag_directive(emitter, *tag_directive, 0))+ return 0;+ }++ for (tag_directive = default_tag_directives;+ tag_directive->handle; tag_directive ++) {+ if (!yaml_emitter_append_tag_directive(emitter, *tag_directive, 1))+ return 0;+ }++ implicit = event->data.document_start.implicit;+ if (!first || emitter->canonical) {+ implicit = 0;+ }++ if ((event->data.document_start.version_directive ||+ (event->data.document_start.tag_directives.start+ != event->data.document_start.tag_directives.end)) &&+ emitter->open_ended)+ {+ if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }++ if (event->data.document_start.version_directive) {+ implicit = 0;+ if (!yaml_emitter_write_indicator(emitter, "%YAML", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_indicator(emitter, "1.1", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }+ + if (event->data.document_start.tag_directives.start+ != event->data.document_start.tag_directives.end) {+ implicit = 0;+ for (tag_directive = event->data.document_start.tag_directives.start;+ tag_directive != event->data.document_start.tag_directives.end;+ tag_directive ++) {+ if (!yaml_emitter_write_indicator(emitter, "%TAG", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_tag_handle(emitter, tag_directive->handle,+ strlen((char *)tag_directive->handle)))+ return 0;+ if (!yaml_emitter_write_tag_content(emitter, tag_directive->prefix,+ strlen((char *)tag_directive->prefix), 1))+ return 0;+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }+ }++ if (yaml_emitter_check_empty_document(emitter)) {+ implicit = 0;+ }++ if (!implicit) {+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ if (!yaml_emitter_write_indicator(emitter, "---", 1, 0, 0))+ return 0;+ if (emitter->canonical) {+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }+ }++ emitter->state = YAML_EMIT_DOCUMENT_CONTENT_STATE;++ return 1;+ }++ else if (event->type == YAML_STREAM_END_EVENT)+ {+ if (emitter->open_ended)+ {+ if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }++ if (!yaml_emitter_flush(emitter))+ return 0;++ emitter->state = YAML_EMIT_END_STATE;++ return 1;+ }++ return yaml_emitter_set_emitter_error(emitter,+ "expected DOCUMENT-START or STREAM-END");+}++/*+ * Expect the root node.+ */++static int+yaml_emitter_emit_document_content(yaml_emitter_t *emitter,+ yaml_event_t *event)+{+ if (!PUSH(emitter, emitter->states, YAML_EMIT_DOCUMENT_END_STATE))+ return 0;++ return yaml_emitter_emit_node(emitter, event, 1, 0, 0, 0);+}++/*+ * Expect DOCUMENT-END.+ */++static int+yaml_emitter_emit_document_end(yaml_emitter_t *emitter,+ yaml_event_t *event)+{+ if (event->type == YAML_DOCUMENT_END_EVENT)+ {+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ if (!event->data.document_end.implicit) {+ if (!yaml_emitter_write_indicator(emitter, "...", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }+ if (!yaml_emitter_flush(emitter))+ return 0;++ emitter->state = YAML_EMIT_DOCUMENT_START_STATE;++ while (!STACK_EMPTY(emitter, emitter->tag_directives)) {+ yaml_tag_directive_t tag_directive = POP(emitter,+ emitter->tag_directives);+ yaml_free(tag_directive.handle);+ yaml_free(tag_directive.prefix);+ }++ return 1;+ }++ return yaml_emitter_set_emitter_error(emitter,+ "expected DOCUMENT-END");+}++/*+ * + * Expect a flow item node.+ */++static int+yaml_emitter_emit_flow_sequence_item(yaml_emitter_t *emitter,+ yaml_event_t *event, int first)+{+ if (first)+ {+ if (!yaml_emitter_write_indicator(emitter, "[", 1, 1, 0))+ return 0;+ if (!yaml_emitter_increase_indent(emitter, 1, 0))+ return 0;+ emitter->flow_level ++;+ }++ if (event->type == YAML_SEQUENCE_END_EVENT)+ {+ emitter->flow_level --;+ emitter->indent = POP(emitter, emitter->indents);+ if (emitter->canonical && !first) {+ if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0))+ return 0;+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }+ if (!yaml_emitter_write_indicator(emitter, "]", 0, 0, 0))+ return 0;+ emitter->state = POP(emitter, emitter->states);++ return 1;+ }++ if (!first) {+ if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0))+ return 0;+ }++ if (emitter->canonical || emitter->column > emitter->best_width) {+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }+ if (!PUSH(emitter, emitter->states, YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE))+ return 0;++ return yaml_emitter_emit_node(emitter, event, 0, 1, 0, 0);+}++/*+ * Expect a flow key node.+ */++static int+yaml_emitter_emit_flow_mapping_key(yaml_emitter_t *emitter,+ yaml_event_t *event, int first)+{+ if (first)+ {+ if (!yaml_emitter_write_indicator(emitter, "{", 1, 1, 0))+ return 0;+ if (!yaml_emitter_increase_indent(emitter, 1, 0))+ return 0;+ emitter->flow_level ++;+ }++ if (event->type == YAML_MAPPING_END_EVENT)+ {+ emitter->flow_level --;+ emitter->indent = POP(emitter, emitter->indents);+ if (emitter->canonical && !first) {+ if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0))+ return 0;+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }+ if (!yaml_emitter_write_indicator(emitter, "}", 0, 0, 0))+ return 0;+ emitter->state = POP(emitter, emitter->states);++ return 1;+ }++ if (!first) {+ if (!yaml_emitter_write_indicator(emitter, ",", 0, 0, 0))+ return 0;+ }+ if (emitter->canonical || emitter->column > emitter->best_width) {+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }++ if (!emitter->canonical && yaml_emitter_check_simple_key(emitter))+ {+ if (!PUSH(emitter, emitter->states,+ YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE))+ return 0;++ return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 1);+ }+ else+ {+ if (!yaml_emitter_write_indicator(emitter, "?", 1, 0, 0))+ return 0;+ if (!PUSH(emitter, emitter->states,+ YAML_EMIT_FLOW_MAPPING_VALUE_STATE))+ return 0;++ return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0);+ }+}++/*+ * Expect a flow value node.+ */++static int+yaml_emitter_emit_flow_mapping_value(yaml_emitter_t *emitter,+ yaml_event_t *event, int simple)+{+ if (simple) {+ if (!yaml_emitter_write_indicator(emitter, ":", 0, 0, 0))+ return 0;+ }+ else {+ if (emitter->canonical || emitter->column > emitter->best_width) {+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ }+ if (!yaml_emitter_write_indicator(emitter, ":", 1, 0, 0))+ return 0;+ }+ if (!PUSH(emitter, emitter->states, YAML_EMIT_FLOW_MAPPING_KEY_STATE))+ return 0;+ return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0);+}++/*+ * Expect a block item node.+ */++static int+yaml_emitter_emit_block_sequence_item(yaml_emitter_t *emitter,+ yaml_event_t *event, int first)+{+ if (first)+ {+ if (!yaml_emitter_increase_indent(emitter, 0,+ (emitter->mapping_context && !emitter->indention)))+ return 0;+ }++ if (event->type == YAML_SEQUENCE_END_EVENT)+ {+ emitter->indent = POP(emitter, emitter->indents);+ emitter->state = POP(emitter, emitter->states);++ return 1;+ }++ if (!yaml_emitter_write_indent(emitter))+ return 0;+ if (!yaml_emitter_write_indicator(emitter, "-", 1, 0, 1))+ return 0;+ if (!PUSH(emitter, emitter->states,+ YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE))+ return 0;++ return yaml_emitter_emit_node(emitter, event, 0, 1, 0, 0);+}++/*+ * Expect a block key node.+ */++static int+yaml_emitter_emit_block_mapping_key(yaml_emitter_t *emitter,+ yaml_event_t *event, int first)+{+ if (first)+ {+ if (!yaml_emitter_increase_indent(emitter, 0, 0))+ return 0;+ }++ if (event->type == YAML_MAPPING_END_EVENT)+ {+ emitter->indent = POP(emitter, emitter->indents);+ emitter->state = POP(emitter, emitter->states);++ return 1;+ }++ if (!yaml_emitter_write_indent(emitter))+ return 0;++ if (yaml_emitter_check_simple_key(emitter))+ {+ if (!PUSH(emitter, emitter->states,+ YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE))+ return 0;++ return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 1);+ }+ else+ {+ if (!yaml_emitter_write_indicator(emitter, "?", 1, 0, 1))+ return 0;+ if (!PUSH(emitter, emitter->states,+ YAML_EMIT_BLOCK_MAPPING_VALUE_STATE))+ return 0;++ return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0);+ }+}++/*+ * Expect a block value node.+ */++static int+yaml_emitter_emit_block_mapping_value(yaml_emitter_t *emitter,+ yaml_event_t *event, int simple)+{+ if (simple) {+ if (!yaml_emitter_write_indicator(emitter, ":", 0, 0, 0))+ return 0;+ }+ else {+ if (!yaml_emitter_write_indent(emitter))+ return 0;+ if (!yaml_emitter_write_indicator(emitter, ":", 1, 0, 1))+ return 0;+ }+ if (!PUSH(emitter, emitter->states,+ YAML_EMIT_BLOCK_MAPPING_KEY_STATE))+ return 0;++ return yaml_emitter_emit_node(emitter, event, 0, 0, 1, 0);+}++/*+ * Expect a node.+ */++static int+yaml_emitter_emit_node(yaml_emitter_t *emitter, yaml_event_t *event,+ int root, int sequence, int mapping, int simple_key)+{+ emitter->root_context = root;+ emitter->sequence_context = sequence;+ emitter->mapping_context = mapping;+ emitter->simple_key_context = simple_key;++ switch (event->type)+ {+ case YAML_ALIAS_EVENT:+ return yaml_emitter_emit_alias(emitter, event);++ case YAML_SCALAR_EVENT:+ return yaml_emitter_emit_scalar(emitter, event);++ case YAML_SEQUENCE_START_EVENT:+ return yaml_emitter_emit_sequence_start(emitter, event);++ case YAML_MAPPING_START_EVENT:+ return yaml_emitter_emit_mapping_start(emitter, event);++ default:+ return yaml_emitter_set_emitter_error(emitter,+ "expected SCALAR, SEQUENCE-START, MAPPING-START, or ALIAS");+ }++ return 0;+}++/*+ * Expect ALIAS.+ */++static int+yaml_emitter_emit_alias(yaml_emitter_t *emitter, yaml_event_t *event)+{+ if (!yaml_emitter_process_anchor(emitter))+ return 0;+ emitter->state = POP(emitter, emitter->states);++ return 1;+}++/*+ * Expect SCALAR.+ */++static int+yaml_emitter_emit_scalar(yaml_emitter_t *emitter, yaml_event_t *event)+{+ if (!yaml_emitter_select_scalar_style(emitter, event))+ return 0;+ if (!yaml_emitter_process_anchor(emitter))+ return 0;+ if (!yaml_emitter_process_tag(emitter))+ return 0;+ if (!yaml_emitter_increase_indent(emitter, 1, 0))+ return 0;+ if (!yaml_emitter_process_scalar(emitter))+ return 0;+ emitter->indent = POP(emitter, emitter->indents);+ emitter->state = POP(emitter, emitter->states);++ return 1;+}++/*+ * Expect SEQUENCE-START.+ */++static int+yaml_emitter_emit_sequence_start(yaml_emitter_t *emitter, yaml_event_t *event)+{+ if (!yaml_emitter_process_anchor(emitter))+ return 0;+ if (!yaml_emitter_process_tag(emitter))+ return 0;++ if (emitter->flow_level || emitter->canonical+ || event->data.sequence_start.style == YAML_FLOW_SEQUENCE_STYLE+ || yaml_emitter_check_empty_sequence(emitter)) {+ emitter->state = YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE;+ }+ else {+ emitter->state = YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE;+ }++ return 1;+}++/*+ * Expect MAPPING-START.+ */++static int+yaml_emitter_emit_mapping_start(yaml_emitter_t *emitter, yaml_event_t *event)+{+ if (!yaml_emitter_process_anchor(emitter))+ return 0;+ if (!yaml_emitter_process_tag(emitter))+ return 0;++ if (emitter->flow_level || emitter->canonical+ || event->data.mapping_start.style == YAML_FLOW_MAPPING_STYLE+ || yaml_emitter_check_empty_mapping(emitter)) {+ emitter->state = YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE;+ }+ else {+ emitter->state = YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE;+ }++ return 1;+}++/*+ * Check if the document content is an empty scalar.+ */++static int+yaml_emitter_check_empty_document(yaml_emitter_t *emitter)+{+ return 0;+}++/*+ * Check if the next events represent an empty sequence.+ */++static int+yaml_emitter_check_empty_sequence(yaml_emitter_t *emitter)+{+ if (emitter->events.tail - emitter->events.head < 2)+ return 0;++ return (emitter->events.head[0].type == YAML_SEQUENCE_START_EVENT+ && emitter->events.head[1].type == YAML_SEQUENCE_END_EVENT);+}++/*+ * Check if the next events represent an empty mapping.+ */++static int+yaml_emitter_check_empty_mapping(yaml_emitter_t *emitter)+{+ if (emitter->events.tail - emitter->events.head < 2)+ return 0;++ return (emitter->events.head[0].type == YAML_MAPPING_START_EVENT+ && emitter->events.head[1].type == YAML_MAPPING_END_EVENT);+}++/*+ * Check if the next node can be expressed as a simple key.+ */++static int+yaml_emitter_check_simple_key(yaml_emitter_t *emitter)+{+ yaml_event_t *event = emitter->events.head;+ size_t length = 0;++ switch (event->type)+ {+ case YAML_ALIAS_EVENT:+ length += emitter->anchor_data.anchor_length;+ break;++ case YAML_SCALAR_EVENT:+ if (emitter->scalar_data.multiline)+ return 0;+ length += emitter->anchor_data.anchor_length+ + emitter->tag_data.handle_length+ + emitter->tag_data.suffix_length+ + emitter->scalar_data.length;+ break;++ case YAML_SEQUENCE_START_EVENT:+ if (!yaml_emitter_check_empty_sequence(emitter))+ return 0;+ length += emitter->anchor_data.anchor_length+ + emitter->tag_data.handle_length+ + emitter->tag_data.suffix_length;+ break;++ case YAML_MAPPING_START_EVENT:+ if (!yaml_emitter_check_empty_sequence(emitter))+ return 0;+ length += emitter->anchor_data.anchor_length+ + emitter->tag_data.handle_length+ + emitter->tag_data.suffix_length;+ break;++ default:+ return 0;+ }++ if (length > 128)+ return 0;++ return 1;+}++/*+ * Determine an acceptable scalar style.+ */++static int+yaml_emitter_select_scalar_style(yaml_emitter_t *emitter, yaml_event_t *event)+{+ yaml_scalar_style_t style = event->data.scalar.style;+ int no_tag = (!emitter->tag_data.handle && !emitter->tag_data.suffix);++ if (no_tag && !event->data.scalar.plain_implicit+ && !event->data.scalar.quoted_implicit) {+ return yaml_emitter_set_emitter_error(emitter,+ "neither tag nor implicit flags are specified");+ }++ if (style == YAML_ANY_SCALAR_STYLE)+ style = YAML_PLAIN_SCALAR_STYLE;++ if (emitter->canonical)+ style = YAML_DOUBLE_QUOTED_SCALAR_STYLE;++ if (emitter->simple_key_context && emitter->scalar_data.multiline)+ style = YAML_DOUBLE_QUOTED_SCALAR_STYLE;++ if (style == YAML_PLAIN_SCALAR_STYLE)+ {+ if ((emitter->flow_level && !emitter->scalar_data.flow_plain_allowed)+ || (!emitter->flow_level && !emitter->scalar_data.block_plain_allowed))+ style = YAML_SINGLE_QUOTED_SCALAR_STYLE;+ if (!emitter->scalar_data.length+ && (emitter->flow_level || emitter->simple_key_context))+ style = YAML_SINGLE_QUOTED_SCALAR_STYLE;+ if (no_tag && !event->data.scalar.plain_implicit)+ style = YAML_SINGLE_QUOTED_SCALAR_STYLE;+ }++ if (style == YAML_SINGLE_QUOTED_SCALAR_STYLE)+ {+ if (!emitter->scalar_data.single_quoted_allowed)+ style = YAML_DOUBLE_QUOTED_SCALAR_STYLE;+ }++ if (style == YAML_LITERAL_SCALAR_STYLE || style == YAML_FOLDED_SCALAR_STYLE)+ {+ if (!emitter->scalar_data.block_allowed+ || emitter->flow_level || emitter->simple_key_context)+ style = YAML_DOUBLE_QUOTED_SCALAR_STYLE;+ }++ if (no_tag && !event->data.scalar.quoted_implicit+ && style != YAML_PLAIN_SCALAR_STYLE)+ {+ emitter->tag_data.handle = (yaml_char_t *)"!";+ emitter->tag_data.handle_length = 1;+ }++ emitter->scalar_data.style = style;++ return 1;+}++/*+ * Write an achor.+ */++static int+yaml_emitter_process_anchor(yaml_emitter_t *emitter)+{+ if (!emitter->anchor_data.anchor)+ return 1;++ if (!yaml_emitter_write_indicator(emitter,+ (emitter->anchor_data.alias ? "*" : "&"), 1, 0, 0))+ return 0;++ return yaml_emitter_write_anchor(emitter,+ emitter->anchor_data.anchor, emitter->anchor_data.anchor_length);+}++/*+ * Write a tag.+ */++static int+yaml_emitter_process_tag(yaml_emitter_t *emitter)+{+ if (!emitter->tag_data.handle && !emitter->tag_data.suffix)+ return 1;++ if (emitter->tag_data.handle)+ {+ if (!yaml_emitter_write_tag_handle(emitter, emitter->tag_data.handle,+ emitter->tag_data.handle_length))+ return 0;+ if (emitter->tag_data.suffix) {+ if (!yaml_emitter_write_tag_content(emitter, emitter->tag_data.suffix,+ emitter->tag_data.suffix_length, 0))+ return 0;+ }+ }+ else+ {+ if (!yaml_emitter_write_indicator(emitter, "!<", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_tag_content(emitter, emitter->tag_data.suffix,+ emitter->tag_data.suffix_length, 0))+ return 0;+ if (!yaml_emitter_write_indicator(emitter, ">", 0, 0, 0))+ return 0;+ }++ return 1;+}++/*+ * Write a scalar.+ */++static int+yaml_emitter_process_scalar(yaml_emitter_t *emitter)+{+ switch (emitter->scalar_data.style)+ {+ case YAML_PLAIN_SCALAR_STYLE:+ return yaml_emitter_write_plain_scalar(emitter,+ emitter->scalar_data.value, emitter->scalar_data.length,+ !emitter->simple_key_context);++ case YAML_SINGLE_QUOTED_SCALAR_STYLE:+ return yaml_emitter_write_single_quoted_scalar(emitter,+ emitter->scalar_data.value, emitter->scalar_data.length,+ !emitter->simple_key_context);++ case YAML_DOUBLE_QUOTED_SCALAR_STYLE:+ return yaml_emitter_write_double_quoted_scalar(emitter,+ emitter->scalar_data.value, emitter->scalar_data.length,+ !emitter->simple_key_context);++ case YAML_LITERAL_SCALAR_STYLE:+ return yaml_emitter_write_literal_scalar(emitter,+ emitter->scalar_data.value, emitter->scalar_data.length);++ case YAML_FOLDED_SCALAR_STYLE:+ return yaml_emitter_write_folded_scalar(emitter,+ emitter->scalar_data.value, emitter->scalar_data.length);++ default:+ assert(1); /* Impossible. */+ }++ return 0;+}++/*+ * Check if a %YAML directive is valid.+ */++static int+yaml_emitter_analyze_version_directive(yaml_emitter_t *emitter,+ yaml_version_directive_t version_directive)+{+ if (version_directive.major != 1 || version_directive.minor != 1) {+ return yaml_emitter_set_emitter_error(emitter,+ "incompatible %YAML directive");+ }++ return 1;+}++/*+ * Check if a %TAG directive is valid.+ */++static int+yaml_emitter_analyze_tag_directive(yaml_emitter_t *emitter,+ yaml_tag_directive_t tag_directive)+{+ yaml_string_t handle = STRING(tag_directive.handle,+ strlen((char *)tag_directive.handle));+ yaml_string_t prefix = STRING(tag_directive.prefix,+ strlen((char *)tag_directive.prefix));++ if (handle.start == handle.end) {+ return yaml_emitter_set_emitter_error(emitter,+ "tag handle must not be empty");+ }++ if (handle.start[0] != '!') {+ return yaml_emitter_set_emitter_error(emitter,+ "tag handle must start with '!'");+ }++ if (handle.end[-1] != '!') {+ return yaml_emitter_set_emitter_error(emitter,+ "tag handle must end with '!'");+ }++ handle.pointer ++;++ while (handle.pointer < handle.end-1) {+ if (!IS_ALPHA(handle)) {+ return yaml_emitter_set_emitter_error(emitter,+ "tag handle must contain alphanumerical characters only");+ }+ MOVE(handle);+ }++ if (prefix.start == prefix.end) {+ return yaml_emitter_set_emitter_error(emitter,+ "tag prefix must not be empty");+ }++ return 1;+}++/*+ * Check if an anchor is valid.+ */++static int+yaml_emitter_analyze_anchor(yaml_emitter_t *emitter,+ yaml_char_t *anchor, int alias)+{+ yaml_string_t string = STRING(anchor, strlen((char *)anchor));++ if (string.start == string.end) {+ return yaml_emitter_set_emitter_error(emitter, alias ?+ "alias value must not be empty" :+ "anchor value must not be empty");+ }++ while (string.pointer != string.end) {+ if (!IS_ALPHA(string)) {+ return yaml_emitter_set_emitter_error(emitter, alias ?+ "alias value must contain alphanumerical characters only" :+ "anchor value must contain alphanumerical characters only");+ }+ MOVE(string);+ }++ emitter->anchor_data.anchor = string.start;+ emitter->anchor_data.anchor_length = string.end - string.start;+ emitter->anchor_data.alias = alias;++ return 1;+}++/*+ * Check if a tag is valid.+ */++static int+yaml_emitter_analyze_tag(yaml_emitter_t *emitter,+ yaml_char_t *tag)+{+ yaml_string_t string = STRING(tag, strlen((char *)tag));+ yaml_tag_directive_t *tag_directive;++ if (string.start == string.end) {+ return yaml_emitter_set_emitter_error(emitter,+ "tag value must not be empty");+ }++ for (tag_directive = emitter->tag_directives.start;+ tag_directive != emitter->tag_directives.top; tag_directive ++) {+ size_t prefix_length = strlen((char *)tag_directive->prefix);+ if (prefix_length < (size_t)(string.end - string.start)+ && strncmp((char *)tag_directive->prefix, (char *)string.start,+ prefix_length) == 0)+ {+ emitter->tag_data.handle = tag_directive->handle;+ emitter->tag_data.handle_length =+ strlen((char *)tag_directive->handle);+ emitter->tag_data.suffix = string.start + prefix_length;+ emitter->tag_data.suffix_length =+ (string.end - string.start) - prefix_length;+ return 1;+ }+ }++ emitter->tag_data.suffix = string.start;+ emitter->tag_data.suffix_length = string.end - string.start;++ return 1;+}++/*+ * Check if a scalar is valid.+ */++static int+yaml_emitter_analyze_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length)+{+ yaml_string_t string = STRING(value, length);++ int block_indicators = 0;+ int flow_indicators = 0;+ int line_breaks = 0;+ int special_characters = 0;++ int leading_space = 0;+ int leading_break = 0;+ int trailing_space = 0;+ int trailing_break = 0;+ int break_space = 0;+ int space_break = 0;++ int preceeded_by_whitespace = 0;+ int followed_by_whitespace = 0;+ int previous_space = 0;+ int previous_break = 0;++ emitter->scalar_data.value = value;+ emitter->scalar_data.length = length;++ if (string.start == string.end)+ {+ emitter->scalar_data.multiline = 0;+ emitter->scalar_data.flow_plain_allowed = 0;+ emitter->scalar_data.block_plain_allowed = 1;+ emitter->scalar_data.single_quoted_allowed = 1;+ emitter->scalar_data.block_allowed = 0;++ return 1;+ }++ if ((CHECK_AT(string, '-', 0)+ && CHECK_AT(string, '-', 1)+ && CHECK_AT(string, '-', 2))+ || (CHECK_AT(string, '.', 0)+ && CHECK_AT(string, '.', 1)+ && CHECK_AT(string, '.', 2))) {+ block_indicators = 1;+ flow_indicators = 1;+ }++ preceeded_by_whitespace = 1;+ followed_by_whitespace = IS_BLANKZ_AT(string, WIDTH(string));++ while (string.pointer != string.end)+ {+ if (string.start == string.pointer)+ {+ if (CHECK(string, '#') || CHECK(string, ',')+ || CHECK(string, '[') || CHECK(string, ']')+ || CHECK(string, '{') || CHECK(string, '}')+ || CHECK(string, '&') || CHECK(string, '*')+ || CHECK(string, '!') || CHECK(string, '|')+ || CHECK(string, '>') || CHECK(string, '\'')+ || CHECK(string, '"') || CHECK(string, '%')+ || CHECK(string, '@') || CHECK(string, '`')) {+ flow_indicators = 1;+ block_indicators = 1;+ }++ if (CHECK(string, '?') || CHECK(string, ':')) {+ flow_indicators = 1;+ if (followed_by_whitespace) {+ block_indicators = 1;+ }+ }++ if (CHECK(string, '-') && followed_by_whitespace) {+ flow_indicators = 1;+ block_indicators = 1;+ }+ }+ else+ {+ if (CHECK(string, ',') || CHECK(string, '?')+ || CHECK(string, '[') || CHECK(string, ']')+ || CHECK(string, '{') || CHECK(string, '}')) {+ flow_indicators = 1;+ }++ if (CHECK(string, ':')) {+ flow_indicators = 1;+ if (followed_by_whitespace) {+ block_indicators = 1;+ }+ }++ if (CHECK(string, '#') && preceeded_by_whitespace) {+ flow_indicators = 1;+ block_indicators = 1;+ }+ }++ if (!IS_PRINTABLE(string)+ || (!IS_ASCII(string) && !emitter->unicode)) {+ special_characters = 1;+ }++ if (IS_BREAK(string)) {+ line_breaks = 1;+ }++ if (IS_SPACE(string))+ {+ if (string.start == string.pointer) {+ leading_space = 1;+ }+ if (string.pointer+WIDTH(string) == string.end) {+ trailing_space = 1;+ }+ if (previous_break) {+ break_space = 1;+ }+ previous_space = 1;+ previous_break = 0;+ }+ else if (IS_BREAK(string))+ {+ if (string.start == string.pointer) {+ leading_break = 1;+ }+ if (string.pointer+WIDTH(string) == string.end) {+ trailing_break = 1;+ }+ if (previous_space) {+ space_break = 1;+ }+ previous_space = 0;+ previous_break = 1;+ }+ else+ {+ previous_space = 0;+ previous_break = 0;+ }++ preceeded_by_whitespace = IS_BLANKZ(string);+ MOVE(string);+ if (string.pointer != string.end) {+ followed_by_whitespace = IS_BLANKZ_AT(string, WIDTH(string));+ }+ }++ emitter->scalar_data.multiline = line_breaks;++ emitter->scalar_data.flow_plain_allowed = 1;+ emitter->scalar_data.block_plain_allowed = 1;+ emitter->scalar_data.single_quoted_allowed = 1;+ emitter->scalar_data.block_allowed = 1;++ if (leading_space || leading_break || trailing_space || trailing_break) {+ emitter->scalar_data.flow_plain_allowed = 0;+ emitter->scalar_data.block_plain_allowed = 0;+ }++ if (trailing_space) {+ emitter->scalar_data.block_allowed = 0;+ }++ if (break_space) {+ emitter->scalar_data.flow_plain_allowed = 0;+ emitter->scalar_data.block_plain_allowed = 0;+ emitter->scalar_data.single_quoted_allowed = 0;+ }++ if (space_break || special_characters) {+ emitter->scalar_data.flow_plain_allowed = 0;+ emitter->scalar_data.block_plain_allowed = 0;+ emitter->scalar_data.single_quoted_allowed = 0;+ emitter->scalar_data.block_allowed = 0;+ }++ if (line_breaks) {+ emitter->scalar_data.flow_plain_allowed = 0;+ emitter->scalar_data.block_plain_allowed = 0;+ }++ if (flow_indicators) {+ emitter->scalar_data.flow_plain_allowed = 0;+ }++ if (block_indicators) {+ emitter->scalar_data.block_plain_allowed = 0;+ }++ return 1;+}++/*+ * Check if the event data is valid.+ */++static int+yaml_emitter_analyze_event(yaml_emitter_t *emitter,+ yaml_event_t *event)+{+ emitter->anchor_data.anchor = NULL;+ emitter->anchor_data.anchor_length = 0;+ emitter->tag_data.handle = NULL;+ emitter->tag_data.handle_length = 0;+ emitter->tag_data.suffix = NULL;+ emitter->tag_data.suffix_length = 0;+ emitter->scalar_data.value = NULL;+ emitter->scalar_data.length = 0;++ switch (event->type)+ {+ case YAML_ALIAS_EVENT:+ if (!yaml_emitter_analyze_anchor(emitter,+ event->data.alias.anchor, 1))+ return 0;+ return 1;++ case YAML_SCALAR_EVENT:+ if (event->data.scalar.anchor) {+ if (!yaml_emitter_analyze_anchor(emitter,+ event->data.scalar.anchor, 0))+ return 0;+ }+ if (event->data.scalar.tag && (emitter->canonical ||+ (!event->data.scalar.plain_implicit+ && !event->data.scalar.quoted_implicit))) {+ if (!yaml_emitter_analyze_tag(emitter, event->data.scalar.tag))+ return 0;+ }+ if (!yaml_emitter_analyze_scalar(emitter,+ event->data.scalar.value, event->data.scalar.length))+ return 0;+ return 1;++ case YAML_SEQUENCE_START_EVENT:+ if (event->data.sequence_start.anchor) {+ if (!yaml_emitter_analyze_anchor(emitter,+ event->data.sequence_start.anchor, 0))+ return 0;+ }+ if (event->data.sequence_start.tag && (emitter->canonical ||+ !event->data.sequence_start.implicit)) {+ if (!yaml_emitter_analyze_tag(emitter,+ event->data.sequence_start.tag))+ return 0;+ }+ return 1;++ case YAML_MAPPING_START_EVENT:+ if (event->data.mapping_start.anchor) {+ if (!yaml_emitter_analyze_anchor(emitter,+ event->data.mapping_start.anchor, 0))+ return 0;+ }+ if (event->data.mapping_start.tag && (emitter->canonical ||+ !event->data.mapping_start.implicit)) {+ if (!yaml_emitter_analyze_tag(emitter,+ event->data.mapping_start.tag))+ return 0;+ }+ return 1;++ default:+ return 1;+ }+}++/*+ * Write the BOM character.+ */++static int+yaml_emitter_write_bom(yaml_emitter_t *emitter)+{+ if (!FLUSH(emitter)) return 0;++ *(emitter->buffer.pointer++) = (yaml_char_t) '\xEF';+ *(emitter->buffer.pointer++) = (yaml_char_t) '\xBB';+ *(emitter->buffer.pointer++) = (yaml_char_t) '\xBF';++ return 1;+}++static int+yaml_emitter_write_indent(yaml_emitter_t *emitter)+{+ int indent = (emitter->indent >= 0) ? emitter->indent : 0;++ if (!emitter->indention || emitter->column > indent+ || (emitter->column == indent && !emitter->whitespace)) {+ if (!PUT_BREAK(emitter)) return 0;+ }++ while (emitter->column < indent) {+ if (!PUT(emitter, ' ')) return 0;+ }++ emitter->whitespace = 1;+ emitter->indention = 1;++ return 1;+}++static int+yaml_emitter_write_indicator(yaml_emitter_t *emitter,+ char *indicator, int need_whitespace,+ int is_whitespace, int is_indention)+{+ yaml_string_t string = STRING((yaml_char_t *)indicator, strlen(indicator));++ if (need_whitespace && !emitter->whitespace) {+ if (!PUT(emitter, ' ')) return 0;+ }++ while (string.pointer != string.end) {+ if (!WRITE(emitter, string)) return 0;+ }++ emitter->whitespace = is_whitespace;+ emitter->indention = (emitter->indention && is_indention);+ emitter->open_ended = 0;++ return 1;+}++static int+yaml_emitter_write_anchor(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length)+{+ yaml_string_t string = STRING(value, length);++ while (string.pointer != string.end) {+ if (!WRITE(emitter, string)) return 0;+ }++ emitter->whitespace = 0;+ emitter->indention = 0;++ return 1;+}++static int+yaml_emitter_write_tag_handle(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length)+{+ yaml_string_t string = STRING(value, length);++ if (!emitter->whitespace) {+ if (!PUT(emitter, ' ')) return 0;+ }++ while (string.pointer != string.end) {+ if (!WRITE(emitter, string)) return 0;+ }++ emitter->whitespace = 0;+ emitter->indention = 0;++ return 1;+}++static int+yaml_emitter_write_tag_content(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length,+ int need_whitespace)+{+ yaml_string_t string = STRING(value, length);++ if (need_whitespace && !emitter->whitespace) {+ if (!PUT(emitter, ' ')) return 0;+ }++ while (string.pointer != string.end) {+ if (IS_ALPHA(string)+ || CHECK(string, ';') || CHECK(string, '/')+ || CHECK(string, '?') || CHECK(string, ':')+ || CHECK(string, '@') || CHECK(string, '&')+ || CHECK(string, '=') || CHECK(string, '+')+ || CHECK(string, '$') || CHECK(string, ',')+ || CHECK(string, '_') || CHECK(string, '.')+ || CHECK(string, '~') || CHECK(string, '*')+ || CHECK(string, '\'') || CHECK(string, '(')+ || CHECK(string, ')') || CHECK(string, '[')+ || CHECK(string, ']')) {+ if (!WRITE(emitter, string)) return 0;+ }+ else {+ int width = WIDTH(string);+ unsigned int value;+ while (width --) {+ value = *(string.pointer++);+ if (!PUT(emitter, '%')) return 0;+ if (!PUT(emitter, (value >> 4)+ + ((value >> 4) < 10 ? '0' : 'A' - 10)))+ return 0;+ if (!PUT(emitter, (value & 0x0F)+ + ((value & 0x0F) < 10 ? '0' : 'A' - 10)))+ return 0;+ }+ }+ }++ emitter->whitespace = 0;+ emitter->indention = 0;++ return 1;+}++static int+yaml_emitter_write_plain_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length, int allow_breaks)+{+ yaml_string_t string = STRING(value, length);+ int spaces = 0;+ int breaks = 0;++ if (!emitter->whitespace) {+ if (!PUT(emitter, ' ')) return 0;+ }++ while (string.pointer != string.end)+ {+ if (IS_SPACE(string))+ {+ if (allow_breaks && !spaces+ && emitter->column > emitter->best_width+ && !IS_SPACE_AT(string, 1)) {+ if (!yaml_emitter_write_indent(emitter)) return 0;+ MOVE(string);+ }+ else {+ if (!WRITE(emitter, string)) return 0;+ }+ spaces = 1;+ }+ else if (IS_BREAK(string))+ {+ if (!breaks && CHECK(string, '\n')) {+ if (!PUT_BREAK(emitter)) return 0;+ }+ if (!WRITE_BREAK(emitter, string)) return 0;+ emitter->indention = 1;+ breaks = 1;+ }+ else+ {+ if (breaks) {+ if (!yaml_emitter_write_indent(emitter)) return 0;+ }+ if (!WRITE(emitter, string)) return 0;+ emitter->indention = 0;+ spaces = 0;+ breaks = 0;+ }+ }++ emitter->whitespace = 0;+ emitter->indention = 0;+ if (emitter->root_context)+ {+ emitter->open_ended = 1;+ }++ return 1;+}++static int+yaml_emitter_write_single_quoted_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length, int allow_breaks)+{+ yaml_string_t string = STRING(value, length);+ int spaces = 0;+ int breaks = 0;++ if (!yaml_emitter_write_indicator(emitter, "'", 1, 0, 0))+ return 0;++ while (string.pointer != string.end)+ {+ if (IS_SPACE(string))+ {+ if (allow_breaks && !spaces+ && emitter->column > emitter->best_width+ && string.pointer != string.start+ && string.pointer != string.end - 1+ && !IS_SPACE_AT(string, 1)) {+ if (!yaml_emitter_write_indent(emitter)) return 0;+ MOVE(string);+ }+ else {+ if (!WRITE(emitter, string)) return 0;+ }+ spaces = 1;+ }+ else if (IS_BREAK(string))+ {+ if (!breaks && CHECK(string, '\n')) {+ if (!PUT_BREAK(emitter)) return 0;+ }+ if (!WRITE_BREAK(emitter, string)) return 0;+ emitter->indention = 1;+ breaks = 1;+ }+ else+ {+ if (breaks) {+ if (!yaml_emitter_write_indent(emitter)) return 0;+ }+ if (CHECK(string, '\'')) {+ if (!PUT(emitter, '\'')) return 0;+ }+ if (!WRITE(emitter, string)) return 0;+ emitter->indention = 0;+ spaces = 0;+ breaks = 0;+ }+ }++ if (!yaml_emitter_write_indicator(emitter, "'", 0, 0, 0))+ return 0;++ emitter->whitespace = 0;+ emitter->indention = 0;++ return 1;+}++static int+yaml_emitter_write_double_quoted_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length, int allow_breaks)+{+ yaml_string_t string = STRING(value, length);+ int spaces = 0;++ if (!yaml_emitter_write_indicator(emitter, "\"", 1, 0, 0))+ return 0;++ while (string.pointer != string.end)+ {+ if (!IS_PRINTABLE(string) || (!emitter->unicode && !IS_ASCII(string))+ || IS_BOM(string) || IS_BREAK(string)+ || CHECK(string, '"') || CHECK(string, '\\'))+ {+ unsigned char octet;+ unsigned int width;+ unsigned int value;+ int k;++ octet = string.pointer[0];+ width = (octet & 0x80) == 0x00 ? 1 :+ (octet & 0xE0) == 0xC0 ? 2 :+ (octet & 0xF0) == 0xE0 ? 3 :+ (octet & 0xF8) == 0xF0 ? 4 : 0;+ value = (octet & 0x80) == 0x00 ? octet & 0x7F :+ (octet & 0xE0) == 0xC0 ? octet & 0x1F :+ (octet & 0xF0) == 0xE0 ? octet & 0x0F :+ (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0;+ for (k = 1; k < (int)width; k ++) {+ octet = string.pointer[k];+ value = (value << 6) + (octet & 0x3F);+ }+ string.pointer += width;++ if (!PUT(emitter, '\\')) return 0;++ switch (value)+ {+ case 0x00:+ if (!PUT(emitter, '0')) return 0;+ break;++ case 0x07:+ if (!PUT(emitter, 'a')) return 0;+ break;++ case 0x08:+ if (!PUT(emitter, 'b')) return 0;+ break;++ case 0x09:+ if (!PUT(emitter, 't')) return 0;+ break;++ case 0x0A:+ if (!PUT(emitter, 'n')) return 0;+ break;++ case 0x0B:+ if (!PUT(emitter, 'v')) return 0;+ break;++ case 0x0C:+ if (!PUT(emitter, 'f')) return 0;+ break;++ case 0x0D:+ if (!PUT(emitter, 'r')) return 0;+ break;++ case 0x1B:+ if (!PUT(emitter, 'e')) return 0;+ break;++ case 0x22:+ if (!PUT(emitter, '\"')) return 0;+ break;++ case 0x5C:+ if (!PUT(emitter, '\\')) return 0;+ break;++ case 0x85:+ if (!PUT(emitter, 'N')) return 0;+ break;++ case 0xA0:+ if (!PUT(emitter, '_')) return 0;+ break;++ case 0x2028:+ if (!PUT(emitter, 'L')) return 0;+ break;++ case 0x2029:+ if (!PUT(emitter, 'P')) return 0;+ break;++ default:+ if (value <= 0xFF) {+ if (!PUT(emitter, 'x')) return 0;+ width = 2;+ }+ else if (value <= 0xFFFF) {+ if (!PUT(emitter, 'u')) return 0;+ width = 4;+ }+ else {+ if (!PUT(emitter, 'U')) return 0;+ width = 8;+ }+ for (k = (width-1)*4; k >= 0; k -= 4) {+ int digit = (value >> k) & 0x0F;+ if (!PUT(emitter, digit + (digit < 10 ? '0' : 'A'-10)))+ return 0;+ }+ }+ spaces = 0;+ }+ else if (IS_SPACE(string))+ {+ if (allow_breaks && !spaces+ && emitter->column > emitter->best_width+ && string.pointer != string.start+ && string.pointer != string.end - 1) {+ if (!yaml_emitter_write_indent(emitter)) return 0;+ if (IS_SPACE_AT(string, 1)) {+ if (!PUT(emitter, '\\')) return 0;+ }+ MOVE(string);+ }+ else {+ if (!WRITE(emitter, string)) return 0;+ }+ spaces = 1;+ }+ else+ {+ if (!WRITE(emitter, string)) return 0;+ spaces = 0;+ }+ }++ if (!yaml_emitter_write_indicator(emitter, "\"", 0, 0, 0))+ return 0;++ emitter->whitespace = 0;+ emitter->indention = 0;++ return 1;+}++static int+yaml_emitter_write_block_scalar_hints(yaml_emitter_t *emitter,+ yaml_string_t string)+{+ char indent_hint[2];+ char *chomp_hint = NULL;++ if (IS_SPACE(string) || IS_BREAK(string))+ {+ indent_hint[0] = '0' + (char)emitter->best_indent;+ indent_hint[1] = '\0';+ if (!yaml_emitter_write_indicator(emitter, indent_hint, 0, 0, 0))+ return 0;+ }++ emitter->open_ended = 0;++ string.pointer = string.end;+ if (string.start == string.pointer)+ {+ chomp_hint = "-";+ }+ else+ {+ do {+ string.pointer --;+ } while ((*string.pointer & 0xC0) == 0x80);+ if (!IS_BREAK(string))+ {+ chomp_hint = "-";+ }+ else if (string.start == string.pointer)+ {+ chomp_hint = "+";+ emitter->open_ended = 1;+ }+ else+ {+ do {+ string.pointer --;+ } while ((*string.pointer & 0xC0) == 0x80);+ if (IS_BREAK(string))+ {+ chomp_hint = "+";+ emitter->open_ended = 1;+ }+ }+ }++ if (chomp_hint)+ {+ if (!yaml_emitter_write_indicator(emitter, chomp_hint, 0, 0, 0))+ return 0;+ }++ return 1;+}++static int+yaml_emitter_write_literal_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length)+{+ yaml_string_t string = STRING(value, length);+ int breaks = 1;++ if (!yaml_emitter_write_indicator(emitter, "|", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_block_scalar_hints(emitter, string))+ return 0;+ if (!PUT_BREAK(emitter)) return 0;+ emitter->indention = 1;+ emitter->whitespace = 1;++ while (string.pointer != string.end)+ {+ if (IS_BREAK(string))+ {+ if (!WRITE_BREAK(emitter, string)) return 0;+ emitter->indention = 1;+ breaks = 1;+ }+ else+ {+ if (breaks) {+ if (!yaml_emitter_write_indent(emitter)) return 0;+ }+ if (!WRITE(emitter, string)) return 0;+ emitter->indention = 0;+ breaks = 0;+ }+ }++ return 1;+}++static int+yaml_emitter_write_folded_scalar(yaml_emitter_t *emitter,+ yaml_char_t *value, size_t length)+{+ yaml_string_t string = STRING(value, length);+ int breaks = 1;+ int leading_spaces = 1;++ if (!yaml_emitter_write_indicator(emitter, ">", 1, 0, 0))+ return 0;+ if (!yaml_emitter_write_block_scalar_hints(emitter, string))+ return 0;+ if (!PUT_BREAK(emitter)) return 0;+ emitter->indention = 1;+ emitter->whitespace = 1;++ while (string.pointer != string.end)+ {+ if (IS_BREAK(string))+ {+ if (!breaks && !leading_spaces && CHECK(string, '\n')) {+ int k = 0;+ while (IS_BREAK_AT(string, k)) {+ k += WIDTH_AT(string, k);+ }+ if (!IS_BLANKZ_AT(string, k)) {+ if (!PUT_BREAK(emitter)) return 0;+ }+ }+ if (!WRITE_BREAK(emitter, string)) return 0;+ emitter->indention = 1;+ breaks = 1;+ }+ else+ {+ if (breaks) {+ if (!yaml_emitter_write_indent(emitter)) return 0;+ leading_spaces = IS_BLANK(string);+ }+ if (!breaks && IS_SPACE(string) && !IS_SPACE_AT(string, 1)+ && emitter->column > emitter->best_width) {+ if (!yaml_emitter_write_indent(emitter)) return 0;+ MOVE(string);+ }+ else {+ if (!WRITE(emitter, string)) return 0;+ }+ emitter->indention = 0;+ breaks = 0;+ }+ }++ return 1;+}+
libyaml/loader.c view
@@ -1,430 +1,430 @@- -#include "yaml_private.h" - -/* - * API functions. - */ - -YAML_DECLARE(int) -yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document); - -/* - * Error handling. - */ - -static int -yaml_parser_set_composer_error(yaml_parser_t *parser, - const char *problem, yaml_mark_t problem_mark); - -static int -yaml_parser_set_composer_error_context(yaml_parser_t *parser, - const char *context, yaml_mark_t context_mark, - const char *problem, yaml_mark_t problem_mark); - - -/* - * Alias handling. - */ - -static int -yaml_parser_register_anchor(yaml_parser_t *parser, - int index, yaml_char_t *anchor); - -/* - * Clean up functions. - */ - -static void -yaml_parser_delete_aliases(yaml_parser_t *parser); - -/* - * Composer functions. - */ - -static int -yaml_parser_load_document(yaml_parser_t *parser, yaml_event_t *first_event); - -static int -yaml_parser_load_node(yaml_parser_t *parser, yaml_event_t *first_event); - -static int -yaml_parser_load_alias(yaml_parser_t *parser, yaml_event_t *first_event); - -static int -yaml_parser_load_scalar(yaml_parser_t *parser, yaml_event_t *first_event); - -static int -yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *first_event); - -static int -yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *first_event); - -/* - * Load the next document of the stream. - */ - -YAML_DECLARE(int) -yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document) -{ - yaml_event_t event; - - assert(parser); /* Non-NULL parser object is expected. */ - assert(document); /* Non-NULL document object is expected. */ - - memset(document, 0, sizeof(yaml_document_t)); - if (!STACK_INIT(parser, document->nodes, INITIAL_STACK_SIZE)) - goto error; - - if (!parser->stream_start_produced) { - if (!yaml_parser_parse(parser, &event)) goto error; - assert(event.type == YAML_STREAM_START_EVENT); - /* STREAM-START is expected. */ - } - - if (parser->stream_end_produced) { - return 1; - } - - if (!yaml_parser_parse(parser, &event)) goto error; - if (event.type == YAML_STREAM_END_EVENT) { - return 1; - } - - if (!STACK_INIT(parser, parser->aliases, INITIAL_STACK_SIZE)) - goto error; - - parser->document = document; - - if (!yaml_parser_load_document(parser, &event)) goto error; - - yaml_parser_delete_aliases(parser); - parser->document = NULL; - - return 1; - -error: - - yaml_parser_delete_aliases(parser); - yaml_document_delete(document); - parser->document = NULL; - - return 0; -} - -/* - * Set composer error. - */ - -static int -yaml_parser_set_composer_error(yaml_parser_t *parser, - const char *problem, yaml_mark_t problem_mark) -{ - parser->error = YAML_COMPOSER_ERROR; - parser->problem = problem; - parser->problem_mark = problem_mark; - - return 0; -} - -/* - * Set composer error with context. - */ - -static int -yaml_parser_set_composer_error_context(yaml_parser_t *parser, - const char *context, yaml_mark_t context_mark, - const char *problem, yaml_mark_t problem_mark) -{ - parser->error = YAML_COMPOSER_ERROR; - parser->context = context; - parser->context_mark = context_mark; - parser->problem = problem; - parser->problem_mark = problem_mark; - - return 0; -} - -/* - * Delete the stack of aliases. - */ - -static void -yaml_parser_delete_aliases(yaml_parser_t *parser) -{ - while (!STACK_EMPTY(parser, parser->aliases)) { - yaml_free(POP(parser, parser->aliases).anchor); - } - STACK_DEL(parser, parser->aliases); -} - -/* - * Compose a document object. - */ - -static int -yaml_parser_load_document(yaml_parser_t *parser, yaml_event_t *first_event) -{ - yaml_event_t event; - - assert(first_event->type == YAML_DOCUMENT_START_EVENT); - /* DOCUMENT-START is expected. */ - - parser->document->version_directive - = first_event->data.document_start.version_directive; - parser->document->tag_directives.start - = first_event->data.document_start.tag_directives.start; - parser->document->tag_directives.end - = first_event->data.document_start.tag_directives.end; - parser->document->start_implicit - = first_event->data.document_start.implicit; - parser->document->start_mark = first_event->start_mark; - - if (!yaml_parser_parse(parser, &event)) return 0; - - if (!yaml_parser_load_node(parser, &event)) return 0; - - if (!yaml_parser_parse(parser, &event)) return 0; - assert(event.type == YAML_DOCUMENT_END_EVENT); - /* DOCUMENT-END is expected. */ - - parser->document->end_implicit = event.data.document_end.implicit; - parser->document->end_mark = event.end_mark; - - return 1; -} - -/* - * Compose a node. - */ - -static int -yaml_parser_load_node(yaml_parser_t *parser, yaml_event_t *first_event) -{ - switch (first_event->type) { - case YAML_ALIAS_EVENT: - return yaml_parser_load_alias(parser, first_event); - case YAML_SCALAR_EVENT: - return yaml_parser_load_scalar(parser, first_event); - case YAML_SEQUENCE_START_EVENT: - return yaml_parser_load_sequence(parser, first_event); - case YAML_MAPPING_START_EVENT: - return yaml_parser_load_mapping(parser, first_event); - default: - assert(0); /* Could not happen. */ - return 0; - } - - return 0; -} - -/* - * Add an anchor. - */ - -static int -yaml_parser_register_anchor(yaml_parser_t *parser, - int index, yaml_char_t *anchor) -{ - yaml_alias_data_t data = { anchor, index, { 0, 0, 0 } }; - yaml_alias_data_t *alias_data; - - if (!anchor) return 1; - - data.mark = parser->document->nodes.start[index-1].start_mark; - - for (alias_data = parser->aliases.start; - alias_data != parser->aliases.top; alias_data ++) { - if (strcmp((char *)alias_data->anchor, (char *)anchor) == 0) { - yaml_free(anchor); - return yaml_parser_set_composer_error_context(parser, - "found duplicate anchor; first occurence", - alias_data->mark, "second occurence", data.mark); - } - } - - if (!PUSH(parser, parser->aliases, data)) { - yaml_free(anchor); - return 0; - } - - return 1; -} - -/* - * Compose a node corresponding to an alias. - */ - -static int -yaml_parser_load_alias(yaml_parser_t *parser, yaml_event_t *first_event) -{ - yaml_char_t *anchor = first_event->data.alias.anchor; - yaml_alias_data_t *alias_data; - - for (alias_data = parser->aliases.start; - alias_data != parser->aliases.top; alias_data ++) { - if (strcmp((char *)alias_data->anchor, (char *)anchor) == 0) { - yaml_free(anchor); - return alias_data->index; - } - } - - yaml_free(anchor); - return yaml_parser_set_composer_error(parser, "found undefined alias", - first_event->start_mark); -} - -/* - * Compose a scalar node. - */ - -static int -yaml_parser_load_scalar(yaml_parser_t *parser, yaml_event_t *first_event) -{ - yaml_node_t node; - int index; - yaml_char_t *tag = first_event->data.scalar.tag; - - if (!tag || strcmp((char *)tag, "!") == 0) { - yaml_free(tag); - tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_SCALAR_TAG); - if (!tag) goto error; - } - - SCALAR_NODE_INIT(node, tag, first_event->data.scalar.value, - first_event->data.scalar.length, first_event->data.scalar.style, - first_event->start_mark, first_event->end_mark); - - if (!PUSH(parser, parser->document->nodes, node)) goto error; - - index = parser->document->nodes.top - parser->document->nodes.start; - - if (!yaml_parser_register_anchor(parser, index, - first_event->data.scalar.anchor)) return 0; - - return index; - -error: - yaml_free(tag); - yaml_free(first_event->data.scalar.anchor); - yaml_free(first_event->data.scalar.value); - return 0; -} - -/* - * Compose a sequence node. - */ - -static int -yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *first_event) -{ - yaml_event_t event; - yaml_node_t node; - struct { - yaml_node_item_t *start; - yaml_node_item_t *end; - yaml_node_item_t *top; - } items = { NULL, NULL, NULL }; - int index, item_index; - yaml_char_t *tag = first_event->data.sequence_start.tag; - - if (!tag || strcmp((char *)tag, "!") == 0) { - yaml_free(tag); - tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_SEQUENCE_TAG); - if (!tag) goto error; - } - - if (!STACK_INIT(parser, items, INITIAL_STACK_SIZE)) goto error; - - SEQUENCE_NODE_INIT(node, tag, items.start, items.end, - first_event->data.sequence_start.style, - first_event->start_mark, first_event->end_mark); - - if (!PUSH(parser, parser->document->nodes, node)) goto error; - - index = parser->document->nodes.top - parser->document->nodes.start; - - if (!yaml_parser_register_anchor(parser, index, - first_event->data.sequence_start.anchor)) return 0; - - if (!yaml_parser_parse(parser, &event)) return 0; - - while (event.type != YAML_SEQUENCE_END_EVENT) { - item_index = yaml_parser_load_node(parser, &event); - if (!item_index) return 0; - if (!PUSH(parser, - parser->document->nodes.start[index-1].data.sequence.items, - item_index)) return 0; - if (!yaml_parser_parse(parser, &event)) return 0; - } - - parser->document->nodes.start[index-1].end_mark = event.end_mark; - - return index; - -error: - yaml_free(tag); - yaml_free(first_event->data.sequence_start.anchor); - return 0; -} - -/* - * Compose a mapping node. - */ - -static int -yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *first_event) -{ - yaml_event_t event; - yaml_node_t node; - struct { - yaml_node_pair_t *start; - yaml_node_pair_t *end; - yaml_node_pair_t *top; - } pairs = { NULL, NULL, NULL }; - int index; - yaml_node_pair_t pair; - yaml_char_t *tag = first_event->data.mapping_start.tag; - - if (!tag || strcmp((char *)tag, "!") == 0) { - yaml_free(tag); - tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_MAPPING_TAG); - if (!tag) goto error; - } - - if (!STACK_INIT(parser, pairs, INITIAL_STACK_SIZE)) goto error; - - MAPPING_NODE_INIT(node, tag, pairs.start, pairs.end, - first_event->data.mapping_start.style, - first_event->start_mark, first_event->end_mark); - - if (!PUSH(parser, parser->document->nodes, node)) goto error; - - index = parser->document->nodes.top - parser->document->nodes.start; - - if (!yaml_parser_register_anchor(parser, index, - first_event->data.mapping_start.anchor)) return 0; - - if (!yaml_parser_parse(parser, &event)) return 0; - - while (event.type != YAML_MAPPING_END_EVENT) { - pair.key = yaml_parser_load_node(parser, &event); - if (!pair.key) return 0; - if (!yaml_parser_parse(parser, &event)) return 0; - pair.value = yaml_parser_load_node(parser, &event); - if (!pair.value) return 0; - if (!PUSH(parser, - parser->document->nodes.start[index-1].data.mapping.pairs, - pair)) return 0; - if (!yaml_parser_parse(parser, &event)) return 0; - } - - parser->document->nodes.start[index-1].end_mark = event.end_mark; - - return index; - -error: - yaml_free(tag); - yaml_free(first_event->data.mapping_start.anchor); - return 0; -} - ++#include "yaml_private.h"++/*+ * API functions.+ */++YAML_DECLARE(int)+yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document);++/*+ * Error handling.+ */++static int+yaml_parser_set_composer_error(yaml_parser_t *parser,+ const char *problem, yaml_mark_t problem_mark);++static int+yaml_parser_set_composer_error_context(yaml_parser_t *parser,+ const char *context, yaml_mark_t context_mark,+ const char *problem, yaml_mark_t problem_mark);+++/*+ * Alias handling.+ */++static int+yaml_parser_register_anchor(yaml_parser_t *parser,+ int index, yaml_char_t *anchor);++/*+ * Clean up functions.+ */++static void+yaml_parser_delete_aliases(yaml_parser_t *parser);++/*+ * Composer functions.+ */++static int+yaml_parser_load_document(yaml_parser_t *parser, yaml_event_t *first_event);++static int+yaml_parser_load_node(yaml_parser_t *parser, yaml_event_t *first_event);++static int+yaml_parser_load_alias(yaml_parser_t *parser, yaml_event_t *first_event);++static int+yaml_parser_load_scalar(yaml_parser_t *parser, yaml_event_t *first_event);++static int+yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *first_event);++static int+yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *first_event);++/*+ * Load the next document of the stream.+ */++YAML_DECLARE(int)+yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document)+{+ yaml_event_t event;++ assert(parser); /* Non-NULL parser object is expected. */+ assert(document); /* Non-NULL document object is expected. */++ memset(document, 0, sizeof(yaml_document_t));+ if (!STACK_INIT(parser, document->nodes, INITIAL_STACK_SIZE))+ goto error;++ if (!parser->stream_start_produced) {+ if (!yaml_parser_parse(parser, &event)) goto error;+ assert(event.type == YAML_STREAM_START_EVENT);+ /* STREAM-START is expected. */+ }++ if (parser->stream_end_produced) {+ return 1;+ }++ if (!yaml_parser_parse(parser, &event)) goto error;+ if (event.type == YAML_STREAM_END_EVENT) {+ return 1;+ }++ if (!STACK_INIT(parser, parser->aliases, INITIAL_STACK_SIZE))+ goto error;++ parser->document = document;++ if (!yaml_parser_load_document(parser, &event)) goto error;++ yaml_parser_delete_aliases(parser);+ parser->document = NULL;++ return 1;++error:++ yaml_parser_delete_aliases(parser);+ yaml_document_delete(document);+ parser->document = NULL;++ return 0;+}++/*+ * Set composer error.+ */++static int+yaml_parser_set_composer_error(yaml_parser_t *parser,+ const char *problem, yaml_mark_t problem_mark)+{+ parser->error = YAML_COMPOSER_ERROR;+ parser->problem = problem;+ parser->problem_mark = problem_mark;++ return 0;+}++/*+ * Set composer error with context.+ */++static int+yaml_parser_set_composer_error_context(yaml_parser_t *parser,+ const char *context, yaml_mark_t context_mark,+ const char *problem, yaml_mark_t problem_mark)+{+ parser->error = YAML_COMPOSER_ERROR;+ parser->context = context;+ parser->context_mark = context_mark;+ parser->problem = problem;+ parser->problem_mark = problem_mark;++ return 0;+}++/*+ * Delete the stack of aliases.+ */++static void+yaml_parser_delete_aliases(yaml_parser_t *parser)+{+ while (!STACK_EMPTY(parser, parser->aliases)) {+ yaml_free(POP(parser, parser->aliases).anchor);+ }+ STACK_DEL(parser, parser->aliases);+}++/*+ * Compose a document object.+ */++static int+yaml_parser_load_document(yaml_parser_t *parser, yaml_event_t *first_event)+{+ yaml_event_t event;++ assert(first_event->type == YAML_DOCUMENT_START_EVENT);+ /* DOCUMENT-START is expected. */++ parser->document->version_directive+ = first_event->data.document_start.version_directive;+ parser->document->tag_directives.start+ = first_event->data.document_start.tag_directives.start;+ parser->document->tag_directives.end+ = first_event->data.document_start.tag_directives.end;+ parser->document->start_implicit+ = first_event->data.document_start.implicit;+ parser->document->start_mark = first_event->start_mark;++ if (!yaml_parser_parse(parser, &event)) return 0;++ if (!yaml_parser_load_node(parser, &event)) return 0;++ if (!yaml_parser_parse(parser, &event)) return 0;+ assert(event.type == YAML_DOCUMENT_END_EVENT);+ /* DOCUMENT-END is expected. */++ parser->document->end_implicit = event.data.document_end.implicit;+ parser->document->end_mark = event.end_mark;++ return 1;+}++/*+ * Compose a node.+ */++static int+yaml_parser_load_node(yaml_parser_t *parser, yaml_event_t *first_event)+{+ switch (first_event->type) {+ case YAML_ALIAS_EVENT:+ return yaml_parser_load_alias(parser, first_event);+ case YAML_SCALAR_EVENT:+ return yaml_parser_load_scalar(parser, first_event);+ case YAML_SEQUENCE_START_EVENT:+ return yaml_parser_load_sequence(parser, first_event);+ case YAML_MAPPING_START_EVENT:+ return yaml_parser_load_mapping(parser, first_event);+ default:+ assert(0); /* Could not happen. */+ return 0;+ }++ return 0;+}++/*+ * Add an anchor.+ */++static int+yaml_parser_register_anchor(yaml_parser_t *parser,+ int index, yaml_char_t *anchor)+{+ yaml_alias_data_t data = { anchor, index, { 0, 0, 0 } };+ yaml_alias_data_t *alias_data;++ if (!anchor) return 1;++ data.mark = parser->document->nodes.start[index-1].start_mark;++ for (alias_data = parser->aliases.start;+ alias_data != parser->aliases.top; alias_data ++) {+ if (strcmp((char *)alias_data->anchor, (char *)anchor) == 0) {+ yaml_free(anchor);+ return yaml_parser_set_composer_error_context(parser,+ "found duplicate anchor; first occurence",+ alias_data->mark, "second occurence", data.mark);+ }+ }++ if (!PUSH(parser, parser->aliases, data)) {+ yaml_free(anchor);+ return 0;+ }++ return 1;+}++/*+ * Compose a node corresponding to an alias.+ */++static int+yaml_parser_load_alias(yaml_parser_t *parser, yaml_event_t *first_event)+{+ yaml_char_t *anchor = first_event->data.alias.anchor;+ yaml_alias_data_t *alias_data;++ for (alias_data = parser->aliases.start;+ alias_data != parser->aliases.top; alias_data ++) {+ if (strcmp((char *)alias_data->anchor, (char *)anchor) == 0) {+ yaml_free(anchor);+ return alias_data->index;+ }+ }++ yaml_free(anchor);+ return yaml_parser_set_composer_error(parser, "found undefined alias",+ first_event->start_mark);+}++/*+ * Compose a scalar node.+ */++static int+yaml_parser_load_scalar(yaml_parser_t *parser, yaml_event_t *first_event)+{+ yaml_node_t node;+ int index;+ yaml_char_t *tag = first_event->data.scalar.tag;++ if (!tag || strcmp((char *)tag, "!") == 0) {+ yaml_free(tag);+ tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_SCALAR_TAG);+ if (!tag) goto error;+ }++ SCALAR_NODE_INIT(node, tag, first_event->data.scalar.value,+ first_event->data.scalar.length, first_event->data.scalar.style,+ first_event->start_mark, first_event->end_mark);++ if (!PUSH(parser, parser->document->nodes, node)) goto error;++ index = parser->document->nodes.top - parser->document->nodes.start;++ if (!yaml_parser_register_anchor(parser, index,+ first_event->data.scalar.anchor)) return 0;++ return index;++error:+ yaml_free(tag);+ yaml_free(first_event->data.scalar.anchor);+ yaml_free(first_event->data.scalar.value);+ return 0;+}++/*+ * Compose a sequence node.+ */++static int+yaml_parser_load_sequence(yaml_parser_t *parser, yaml_event_t *first_event)+{+ yaml_event_t event;+ yaml_node_t node;+ struct {+ yaml_node_item_t *start;+ yaml_node_item_t *end;+ yaml_node_item_t *top;+ } items = { NULL, NULL, NULL };+ int index, item_index;+ yaml_char_t *tag = first_event->data.sequence_start.tag;++ if (!tag || strcmp((char *)tag, "!") == 0) {+ yaml_free(tag);+ tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_SEQUENCE_TAG);+ if (!tag) goto error;+ }++ if (!STACK_INIT(parser, items, INITIAL_STACK_SIZE)) goto error;++ SEQUENCE_NODE_INIT(node, tag, items.start, items.end,+ first_event->data.sequence_start.style,+ first_event->start_mark, first_event->end_mark);++ if (!PUSH(parser, parser->document->nodes, node)) goto error;++ index = parser->document->nodes.top - parser->document->nodes.start;++ if (!yaml_parser_register_anchor(parser, index,+ first_event->data.sequence_start.anchor)) return 0;++ if (!yaml_parser_parse(parser, &event)) return 0;++ while (event.type != YAML_SEQUENCE_END_EVENT) {+ item_index = yaml_parser_load_node(parser, &event);+ if (!item_index) return 0;+ if (!PUSH(parser,+ parser->document->nodes.start[index-1].data.sequence.items,+ item_index)) return 0;+ if (!yaml_parser_parse(parser, &event)) return 0;+ }++ parser->document->nodes.start[index-1].end_mark = event.end_mark;++ return index;++error:+ yaml_free(tag);+ yaml_free(first_event->data.sequence_start.anchor);+ return 0;+}++/*+ * Compose a mapping node.+ */++static int+yaml_parser_load_mapping(yaml_parser_t *parser, yaml_event_t *first_event)+{+ yaml_event_t event;+ yaml_node_t node;+ struct {+ yaml_node_pair_t *start;+ yaml_node_pair_t *end;+ yaml_node_pair_t *top;+ } pairs = { NULL, NULL, NULL };+ int index;+ yaml_node_pair_t pair;+ yaml_char_t *tag = first_event->data.mapping_start.tag;++ if (!tag || strcmp((char *)tag, "!") == 0) {+ yaml_free(tag);+ tag = yaml_strdup((yaml_char_t *)YAML_DEFAULT_MAPPING_TAG);+ if (!tag) goto error;+ }++ if (!STACK_INIT(parser, pairs, INITIAL_STACK_SIZE)) goto error;++ MAPPING_NODE_INIT(node, tag, pairs.start, pairs.end,+ first_event->data.mapping_start.style,+ first_event->start_mark, first_event->end_mark);++ if (!PUSH(parser, parser->document->nodes, node)) goto error;++ index = parser->document->nodes.top - parser->document->nodes.start;++ if (!yaml_parser_register_anchor(parser, index,+ first_event->data.mapping_start.anchor)) return 0;++ if (!yaml_parser_parse(parser, &event)) return 0;++ while (event.type != YAML_MAPPING_END_EVENT) {+ pair.key = yaml_parser_load_node(parser, &event);+ if (!pair.key) return 0;+ if (!yaml_parser_parse(parser, &event)) return 0;+ pair.value = yaml_parser_load_node(parser, &event);+ if (!pair.value) return 0;+ if (!PUSH(parser,+ parser->document->nodes.start[index-1].data.mapping.pairs,+ pair)) return 0;+ if (!yaml_parser_parse(parser, &event)) return 0;+ }++ parser->document->nodes.start[index-1].end_mark = event.end_mark;++ return index;++error:+ yaml_free(tag);+ yaml_free(first_event->data.mapping_start.anchor);+ return 0;+}+
libyaml/parser.c view
@@ -1,1374 +1,1374 @@- -/* - * The parser implements the following grammar: - * - * stream ::= STREAM-START implicit_document? explicit_document* STREAM-END - * implicit_document ::= block_node DOCUMENT-END* - * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* - * block_node_or_indentless_sequence ::= - * ALIAS - * | properties (block_content | indentless_block_sequence)? - * | block_content - * | indentless_block_sequence - * block_node ::= ALIAS - * | properties block_content? - * | block_content - * flow_node ::= ALIAS - * | properties flow_content? - * | flow_content - * properties ::= TAG ANCHOR? | ANCHOR TAG? - * block_content ::= block_collection | flow_collection | SCALAR - * flow_content ::= flow_collection | SCALAR - * block_collection ::= block_sequence | block_mapping - * flow_collection ::= flow_sequence | flow_mapping - * block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END - * indentless_sequence ::= (BLOCK-ENTRY block_node?)+ - * block_mapping ::= BLOCK-MAPPING_START - * ((KEY block_node_or_indentless_sequence?)? - * (VALUE block_node_or_indentless_sequence?)?)* - * BLOCK-END - * flow_sequence ::= FLOW-SEQUENCE-START - * (flow_sequence_entry FLOW-ENTRY)* - * flow_sequence_entry? - * FLOW-SEQUENCE-END - * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? - * flow_mapping ::= FLOW-MAPPING-START - * (flow_mapping_entry FLOW-ENTRY)* - * flow_mapping_entry? - * FLOW-MAPPING-END - * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? - */ - -#include "yaml_private.h" - -/* - * Peek the next token in the token queue. - */ - -#define PEEK_TOKEN(parser) \ - ((parser->token_available || yaml_parser_fetch_more_tokens(parser)) ? \ - parser->tokens.head : NULL) - -/* - * Remove the next token from the queue (must be called after PEEK_TOKEN). - */ - -#define SKIP_TOKEN(parser) \ - (parser->token_available = 0, \ - parser->tokens_parsed ++, \ - parser->stream_end_produced = \ - (parser->tokens.head->type == YAML_STREAM_END_TOKEN), \ - parser->tokens.head ++) - -/* - * Public API declarations. - */ - -YAML_DECLARE(int) -yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event); - -/* - * Error handling. - */ - -static int -yaml_parser_set_parser_error(yaml_parser_t *parser, - const char *problem, yaml_mark_t problem_mark); - -static int -yaml_parser_set_parser_error_context(yaml_parser_t *parser, - const char *context, yaml_mark_t context_mark, - const char *problem, yaml_mark_t problem_mark); - -/* - * State functions. - */ - -static int -yaml_parser_state_machine(yaml_parser_t *parser, yaml_event_t *event); - -static int -yaml_parser_parse_stream_start(yaml_parser_t *parser, yaml_event_t *event); - -static int -yaml_parser_parse_document_start(yaml_parser_t *parser, yaml_event_t *event, - int implicit); - -static int -yaml_parser_parse_document_content(yaml_parser_t *parser, yaml_event_t *event); - -static int -yaml_parser_parse_document_end(yaml_parser_t *parser, yaml_event_t *event); - -static int -yaml_parser_parse_node(yaml_parser_t *parser, yaml_event_t *event, - int block, int indentless_sequence); - -static int -yaml_parser_parse_block_sequence_entry(yaml_parser_t *parser, - yaml_event_t *event, int first); - -static int -yaml_parser_parse_indentless_sequence_entry(yaml_parser_t *parser, - yaml_event_t *event); - -static int -yaml_parser_parse_block_mapping_key(yaml_parser_t *parser, - yaml_event_t *event, int first); - -static int -yaml_parser_parse_block_mapping_value(yaml_parser_t *parser, - yaml_event_t *event); - -static int -yaml_parser_parse_flow_sequence_entry(yaml_parser_t *parser, - yaml_event_t *event, int first); - -static int -yaml_parser_parse_flow_sequence_entry_mapping_key(yaml_parser_t *parser, - yaml_event_t *event); - -static int -yaml_parser_parse_flow_sequence_entry_mapping_value(yaml_parser_t *parser, - yaml_event_t *event); - -static int -yaml_parser_parse_flow_sequence_entry_mapping_end(yaml_parser_t *parser, - yaml_event_t *event); - -static int -yaml_parser_parse_flow_mapping_key(yaml_parser_t *parser, - yaml_event_t *event, int first); - -static int -yaml_parser_parse_flow_mapping_value(yaml_parser_t *parser, - yaml_event_t *event, int empty); - -/* - * Utility functions. - */ - -static int -yaml_parser_process_empty_scalar(yaml_parser_t *parser, - yaml_event_t *event, yaml_mark_t mark); - -static int -yaml_parser_process_directives(yaml_parser_t *parser, - yaml_version_directive_t **version_directive_ref, - yaml_tag_directive_t **tag_directives_start_ref, - yaml_tag_directive_t **tag_directives_end_ref); - -static int -yaml_parser_append_tag_directive(yaml_parser_t *parser, - yaml_tag_directive_t value, int allow_duplicates, yaml_mark_t mark); - -/* - * Get the next event. - */ - -YAML_DECLARE(int) -yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event) -{ - assert(parser); /* Non-NULL parser object is expected. */ - assert(event); /* Non-NULL event object is expected. */ - - /* Erase the event object. */ - - memset(event, 0, sizeof(yaml_event_t)); - - /* No events after the end of the stream or error. */ - - if (parser->stream_end_produced || parser->error || - parser->state == YAML_PARSE_END_STATE) { - return 1; - } - - /* Generate the next event. */ - - return yaml_parser_state_machine(parser, event); -} - -/* - * Set parser error. - */ - -static int -yaml_parser_set_parser_error(yaml_parser_t *parser, - const char *problem, yaml_mark_t problem_mark) -{ - parser->error = YAML_PARSER_ERROR; - parser->problem = problem; - parser->problem_mark = problem_mark; - - return 0; -} - -static int -yaml_parser_set_parser_error_context(yaml_parser_t *parser, - const char *context, yaml_mark_t context_mark, - const char *problem, yaml_mark_t problem_mark) -{ - parser->error = YAML_PARSER_ERROR; - parser->context = context; - parser->context_mark = context_mark; - parser->problem = problem; - parser->problem_mark = problem_mark; - - return 0; -} - - -/* - * State dispatcher. - */ - -static int -yaml_parser_state_machine(yaml_parser_t *parser, yaml_event_t *event) -{ - switch (parser->state) - { - case YAML_PARSE_STREAM_START_STATE: - return yaml_parser_parse_stream_start(parser, event); - - case YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE: - return yaml_parser_parse_document_start(parser, event, 1); - - case YAML_PARSE_DOCUMENT_START_STATE: - return yaml_parser_parse_document_start(parser, event, 0); - - case YAML_PARSE_DOCUMENT_CONTENT_STATE: - return yaml_parser_parse_document_content(parser, event); - - case YAML_PARSE_DOCUMENT_END_STATE: - return yaml_parser_parse_document_end(parser, event); - - case YAML_PARSE_BLOCK_NODE_STATE: - return yaml_parser_parse_node(parser, event, 1, 0); - - case YAML_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE: - return yaml_parser_parse_node(parser, event, 1, 1); - - case YAML_PARSE_FLOW_NODE_STATE: - return yaml_parser_parse_node(parser, event, 0, 0); - - case YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE: - return yaml_parser_parse_block_sequence_entry(parser, event, 1); - - case YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE: - return yaml_parser_parse_block_sequence_entry(parser, event, 0); - - case YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE: - return yaml_parser_parse_indentless_sequence_entry(parser, event); - - case YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE: - return yaml_parser_parse_block_mapping_key(parser, event, 1); - - case YAML_PARSE_BLOCK_MAPPING_KEY_STATE: - return yaml_parser_parse_block_mapping_key(parser, event, 0); - - case YAML_PARSE_BLOCK_MAPPING_VALUE_STATE: - return yaml_parser_parse_block_mapping_value(parser, event); - - case YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE: - return yaml_parser_parse_flow_sequence_entry(parser, event, 1); - - case YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE: - return yaml_parser_parse_flow_sequence_entry(parser, event, 0); - - case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE: - return yaml_parser_parse_flow_sequence_entry_mapping_key(parser, event); - - case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE: - return yaml_parser_parse_flow_sequence_entry_mapping_value(parser, event); - - case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE: - return yaml_parser_parse_flow_sequence_entry_mapping_end(parser, event); - - case YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE: - return yaml_parser_parse_flow_mapping_key(parser, event, 1); - - case YAML_PARSE_FLOW_MAPPING_KEY_STATE: - return yaml_parser_parse_flow_mapping_key(parser, event, 0); - - case YAML_PARSE_FLOW_MAPPING_VALUE_STATE: - return yaml_parser_parse_flow_mapping_value(parser, event, 0); - - case YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE: - return yaml_parser_parse_flow_mapping_value(parser, event, 1); - - default: - assert(1); /* Invalid state. */ - } - - return 0; -} - -/* - * Parse the production: - * stream ::= STREAM-START implicit_document? explicit_document* STREAM-END - * ************ - */ - -static int -yaml_parser_parse_stream_start(yaml_parser_t *parser, yaml_event_t *event) -{ - yaml_token_t *token; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type != YAML_STREAM_START_TOKEN) { - return yaml_parser_set_parser_error(parser, - "did not find expected <stream-start>", token->start_mark); - } - - parser->state = YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE; - STREAM_START_EVENT_INIT(*event, token->data.stream_start.encoding, - token->start_mark, token->start_mark); - SKIP_TOKEN(parser); - - return 1; -} - -/* - * Parse the productions: - * implicit_document ::= block_node DOCUMENT-END* - * * - * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* - * ************************* - */ - -static int -yaml_parser_parse_document_start(yaml_parser_t *parser, yaml_event_t *event, - int implicit) -{ - yaml_token_t *token; - yaml_version_directive_t *version_directive = NULL; - struct { - yaml_tag_directive_t *start; - yaml_tag_directive_t *end; - } tag_directives = { NULL, NULL }; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - /* Parse extra document end indicators. */ - - if (!implicit) - { - while (token->type == YAML_DOCUMENT_END_TOKEN) { - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - } - } - - /* Parse an implicit document. */ - - if (implicit && token->type != YAML_VERSION_DIRECTIVE_TOKEN && - token->type != YAML_TAG_DIRECTIVE_TOKEN && - token->type != YAML_DOCUMENT_START_TOKEN && - token->type != YAML_STREAM_END_TOKEN) - { - if (!yaml_parser_process_directives(parser, NULL, NULL, NULL)) - return 0; - if (!PUSH(parser, parser->states, YAML_PARSE_DOCUMENT_END_STATE)) - return 0; - parser->state = YAML_PARSE_BLOCK_NODE_STATE; - DOCUMENT_START_EVENT_INIT(*event, NULL, NULL, NULL, 1, - token->start_mark, token->start_mark); - return 1; - } - - /* Parse an explicit document. */ - - else if (token->type != YAML_STREAM_END_TOKEN) - { - yaml_mark_t start_mark, end_mark; - start_mark = token->start_mark; - if (!yaml_parser_process_directives(parser, &version_directive, - &tag_directives.start, &tag_directives.end)) - return 0; - token = PEEK_TOKEN(parser); - if (!token) goto error; - if (token->type != YAML_DOCUMENT_START_TOKEN) { - yaml_parser_set_parser_error(parser, - "did not find expected <document start>", token->start_mark); - goto error; - } - if (!PUSH(parser, parser->states, YAML_PARSE_DOCUMENT_END_STATE)) - goto error; - parser->state = YAML_PARSE_DOCUMENT_CONTENT_STATE; - end_mark = token->end_mark; - DOCUMENT_START_EVENT_INIT(*event, version_directive, - tag_directives.start, tag_directives.end, 0, - start_mark, end_mark); - SKIP_TOKEN(parser); - version_directive = NULL; - tag_directives.start = tag_directives.end = NULL; - return 1; - } - - /* Parse the stream end. */ - - else - { - parser->state = YAML_PARSE_END_STATE; - STREAM_END_EVENT_INIT(*event, token->start_mark, token->end_mark); - SKIP_TOKEN(parser); - return 1; - } - -error: - yaml_free(version_directive); - while (tag_directives.start != tag_directives.end) { - yaml_free(tag_directives.end[-1].handle); - yaml_free(tag_directives.end[-1].prefix); - tag_directives.end --; - } - yaml_free(tag_directives.start); - return 0; -} - -/* - * Parse the productions: - * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* - * *********** - */ - -static int -yaml_parser_parse_document_content(yaml_parser_t *parser, yaml_event_t *event) -{ - yaml_token_t *token; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type == YAML_VERSION_DIRECTIVE_TOKEN || - token->type == YAML_TAG_DIRECTIVE_TOKEN || - token->type == YAML_DOCUMENT_START_TOKEN || - token->type == YAML_DOCUMENT_END_TOKEN || - token->type == YAML_STREAM_END_TOKEN) { - parser->state = POP(parser, parser->states); - return yaml_parser_process_empty_scalar(parser, event, - token->start_mark); - } - else { - return yaml_parser_parse_node(parser, event, 1, 0); - } -} - -/* - * Parse the productions: - * implicit_document ::= block_node DOCUMENT-END* - * ************* - * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END* - * ************* - */ - -static int -yaml_parser_parse_document_end(yaml_parser_t *parser, yaml_event_t *event) -{ - yaml_token_t *token; - yaml_mark_t start_mark, end_mark; - int implicit = 1; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - start_mark = end_mark = token->start_mark; - - if (token->type == YAML_DOCUMENT_END_TOKEN) { - end_mark = token->end_mark; - SKIP_TOKEN(parser); - implicit = 0; - } - - while (!STACK_EMPTY(parser, parser->tag_directives)) { - yaml_tag_directive_t tag_directive = POP(parser, parser->tag_directives); - yaml_free(tag_directive.handle); - yaml_free(tag_directive.prefix); - } - - parser->state = YAML_PARSE_DOCUMENT_START_STATE; - DOCUMENT_END_EVENT_INIT(*event, implicit, start_mark, end_mark); - - return 1; -} - -/* - * Parse the productions: - * block_node_or_indentless_sequence ::= - * ALIAS - * ***** - * | properties (block_content | indentless_block_sequence)? - * ********** * - * | block_content | indentless_block_sequence - * * - * block_node ::= ALIAS - * ***** - * | properties block_content? - * ********** * - * | block_content - * * - * flow_node ::= ALIAS - * ***** - * | properties flow_content? - * ********** * - * | flow_content - * * - * properties ::= TAG ANCHOR? | ANCHOR TAG? - * ************************* - * block_content ::= block_collection | flow_collection | SCALAR - * ****** - * flow_content ::= flow_collection | SCALAR - * ****** - */ - -static int -yaml_parser_parse_node(yaml_parser_t *parser, yaml_event_t *event, - int block, int indentless_sequence) -{ - yaml_token_t *token; - yaml_char_t *anchor = NULL; - yaml_char_t *tag_handle = NULL; - yaml_char_t *tag_suffix = NULL; - yaml_char_t *tag = NULL; - yaml_mark_t start_mark, end_mark, tag_mark; - int implicit; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type == YAML_ALIAS_TOKEN) - { - parser->state = POP(parser, parser->states); - ALIAS_EVENT_INIT(*event, token->data.alias.value, - token->start_mark, token->end_mark); - SKIP_TOKEN(parser); - return 1; - } - - else - { - start_mark = end_mark = token->start_mark; - - if (token->type == YAML_ANCHOR_TOKEN) - { - anchor = token->data.anchor.value; - start_mark = token->start_mark; - end_mark = token->end_mark; - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) goto error; - if (token->type == YAML_TAG_TOKEN) - { - tag_handle = token->data.tag.handle; - tag_suffix = token->data.tag.suffix; - tag_mark = token->start_mark; - end_mark = token->end_mark; - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) goto error; - } - } - else if (token->type == YAML_TAG_TOKEN) - { - tag_handle = token->data.tag.handle; - tag_suffix = token->data.tag.suffix; - start_mark = tag_mark = token->start_mark; - end_mark = token->end_mark; - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) goto error; - if (token->type == YAML_ANCHOR_TOKEN) - { - anchor = token->data.anchor.value; - end_mark = token->end_mark; - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) goto error; - } - } - - if (tag_handle) { - if (!*tag_handle) { - tag = tag_suffix; - yaml_free(tag_handle); - tag_handle = tag_suffix = NULL; - } - else { - yaml_tag_directive_t *tag_directive; - for (tag_directive = parser->tag_directives.start; - tag_directive != parser->tag_directives.top; - tag_directive ++) { - if (strcmp((char *)tag_directive->handle, (char *)tag_handle) == 0) { - size_t prefix_len = strlen((char *)tag_directive->prefix); - size_t suffix_len = strlen((char *)tag_suffix); - tag = yaml_malloc(prefix_len+suffix_len+1); - if (!tag) { - parser->error = YAML_MEMORY_ERROR; - goto error; - } - memcpy(tag, tag_directive->prefix, prefix_len); - memcpy(tag+prefix_len, tag_suffix, suffix_len); - tag[prefix_len+suffix_len] = '\0'; - yaml_free(tag_handle); - yaml_free(tag_suffix); - tag_handle = tag_suffix = NULL; - break; - } - } - if (!tag) { - yaml_parser_set_parser_error_context(parser, - "while parsing a node", start_mark, - "found undefined tag handle", tag_mark); - goto error; - } - } - } - - implicit = (!tag || !*tag); - if (indentless_sequence && token->type == YAML_BLOCK_ENTRY_TOKEN) { - end_mark = token->end_mark; - parser->state = YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE; - SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, - YAML_BLOCK_SEQUENCE_STYLE, start_mark, end_mark); - return 1; - } - else { - if (token->type == YAML_SCALAR_TOKEN) { - int plain_implicit = 0; - int quoted_implicit = 0; - end_mark = token->end_mark; - if ((token->data.scalar.style == YAML_PLAIN_SCALAR_STYLE && !tag) - || (tag && strcmp((char *)tag, "!") == 0)) { - plain_implicit = 1; - } - else if (!tag) { - quoted_implicit = 1; - } - parser->state = POP(parser, parser->states); - SCALAR_EVENT_INIT(*event, anchor, tag, - token->data.scalar.value, token->data.scalar.length, - plain_implicit, quoted_implicit, - token->data.scalar.style, start_mark, end_mark); - SKIP_TOKEN(parser); - return 1; - } - else if (token->type == YAML_FLOW_SEQUENCE_START_TOKEN) { - end_mark = token->end_mark; - parser->state = YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE; - SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, - YAML_FLOW_SEQUENCE_STYLE, start_mark, end_mark); - return 1; - } - else if (token->type == YAML_FLOW_MAPPING_START_TOKEN) { - end_mark = token->end_mark; - parser->state = YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE; - MAPPING_START_EVENT_INIT(*event, anchor, tag, implicit, - YAML_FLOW_MAPPING_STYLE, start_mark, end_mark); - return 1; - } - else if (block && token->type == YAML_BLOCK_SEQUENCE_START_TOKEN) { - end_mark = token->end_mark; - parser->state = YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE; - SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit, - YAML_BLOCK_SEQUENCE_STYLE, start_mark, end_mark); - return 1; - } - else if (block && token->type == YAML_BLOCK_MAPPING_START_TOKEN) { - end_mark = token->end_mark; - parser->state = YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE; - MAPPING_START_EVENT_INIT(*event, anchor, tag, implicit, - YAML_BLOCK_MAPPING_STYLE, start_mark, end_mark); - return 1; - } - else if (anchor || tag) { - yaml_char_t *value = yaml_malloc(1); - if (!value) { - parser->error = YAML_MEMORY_ERROR; - goto error; - } - value[0] = '\0'; - parser->state = POP(parser, parser->states); - SCALAR_EVENT_INIT(*event, anchor, tag, value, 0, - implicit, 0, YAML_PLAIN_SCALAR_STYLE, - start_mark, end_mark); - return 1; - } - else { - yaml_parser_set_parser_error_context(parser, - (block ? "while parsing a block node" - : "while parsing a flow node"), start_mark, - "did not find expected node content", token->start_mark); - goto error; - } - } - } - -error: - yaml_free(anchor); - yaml_free(tag_handle); - yaml_free(tag_suffix); - yaml_free(tag); - - return 0; -} - -/* - * Parse the productions: - * block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END - * ******************** *********** * ********* - */ - -static int -yaml_parser_parse_block_sequence_entry(yaml_parser_t *parser, - yaml_event_t *event, int first) -{ - yaml_token_t *token; - - if (first) { - token = PEEK_TOKEN(parser); - if (!PUSH(parser, parser->marks, token->start_mark)) - return 0; - SKIP_TOKEN(parser); - } - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type == YAML_BLOCK_ENTRY_TOKEN) - { - yaml_mark_t mark = token->end_mark; - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - if (token->type != YAML_BLOCK_ENTRY_TOKEN && - token->type != YAML_BLOCK_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 1, 0); - } - else { - parser->state = YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE; - return yaml_parser_process_empty_scalar(parser, event, mark); - } - } - - else if (token->type == YAML_BLOCK_END_TOKEN) - { - yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */ - parser->state = POP(parser, parser->states); - dummy_mark = POP(parser, parser->marks); - SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->end_mark); - SKIP_TOKEN(parser); - return 1; - } - - else - { - return yaml_parser_set_parser_error_context(parser, - "while parsing a block collection", POP(parser, parser->marks), - "did not find expected '-' indicator", token->start_mark); - } -} - -/* - * Parse the productions: - * indentless_sequence ::= (BLOCK-ENTRY block_node?)+ - * *********** * - */ - -static int -yaml_parser_parse_indentless_sequence_entry(yaml_parser_t *parser, - yaml_event_t *event) -{ - yaml_token_t *token; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type == YAML_BLOCK_ENTRY_TOKEN) - { - yaml_mark_t mark = token->end_mark; - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - if (token->type != YAML_BLOCK_ENTRY_TOKEN && - token->type != YAML_KEY_TOKEN && - token->type != YAML_VALUE_TOKEN && - token->type != YAML_BLOCK_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 1, 0); - } - else { - parser->state = YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE; - return yaml_parser_process_empty_scalar(parser, event, mark); - } - } - - else - { - parser->state = POP(parser, parser->states); - SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->start_mark); - return 1; - } -} - -/* - * Parse the productions: - * block_mapping ::= BLOCK-MAPPING_START - * ******************* - * ((KEY block_node_or_indentless_sequence?)? - * *** * - * (VALUE block_node_or_indentless_sequence?)?)* - * - * BLOCK-END - * ********* - */ - -static int -yaml_parser_parse_block_mapping_key(yaml_parser_t *parser, - yaml_event_t *event, int first) -{ - yaml_token_t *token; - - if (first) { - token = PEEK_TOKEN(parser); - if (!PUSH(parser, parser->marks, token->start_mark)) - return 0; - SKIP_TOKEN(parser); - } - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type == YAML_KEY_TOKEN) - { - yaml_mark_t mark = token->end_mark; - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - if (token->type != YAML_KEY_TOKEN && - token->type != YAML_VALUE_TOKEN && - token->type != YAML_BLOCK_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_BLOCK_MAPPING_VALUE_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 1, 1); - } - else { - parser->state = YAML_PARSE_BLOCK_MAPPING_VALUE_STATE; - return yaml_parser_process_empty_scalar(parser, event, mark); - } - } - - else if (token->type == YAML_BLOCK_END_TOKEN) - { - yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */ - parser->state = POP(parser, parser->states); - dummy_mark = POP(parser, parser->marks); - MAPPING_END_EVENT_INIT(*event, token->start_mark, token->end_mark); - SKIP_TOKEN(parser); - return 1; - } - - else - { - return yaml_parser_set_parser_error_context(parser, - "while parsing a block mapping", POP(parser, parser->marks), - "did not find expected key", token->start_mark); - } -} - -/* - * Parse the productions: - * block_mapping ::= BLOCK-MAPPING_START - * - * ((KEY block_node_or_indentless_sequence?)? - * - * (VALUE block_node_or_indentless_sequence?)?)* - * ***** * - * BLOCK-END - * - */ - -static int -yaml_parser_parse_block_mapping_value(yaml_parser_t *parser, - yaml_event_t *event) -{ - yaml_token_t *token; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type == YAML_VALUE_TOKEN) - { - yaml_mark_t mark = token->end_mark; - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - if (token->type != YAML_KEY_TOKEN && - token->type != YAML_VALUE_TOKEN && - token->type != YAML_BLOCK_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_BLOCK_MAPPING_KEY_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 1, 1); - } - else { - parser->state = YAML_PARSE_BLOCK_MAPPING_KEY_STATE; - return yaml_parser_process_empty_scalar(parser, event, mark); - } - } - - else - { - parser->state = YAML_PARSE_BLOCK_MAPPING_KEY_STATE; - return yaml_parser_process_empty_scalar(parser, event, token->start_mark); - } -} - -/* - * Parse the productions: - * flow_sequence ::= FLOW-SEQUENCE-START - * ******************* - * (flow_sequence_entry FLOW-ENTRY)* - * * ********** - * flow_sequence_entry? - * * - * FLOW-SEQUENCE-END - * ***************** - * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? - * * - */ - -static int -yaml_parser_parse_flow_sequence_entry(yaml_parser_t *parser, - yaml_event_t *event, int first) -{ - yaml_token_t *token; - yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */ - - if (first) { - token = PEEK_TOKEN(parser); - if (!PUSH(parser, parser->marks, token->start_mark)) - return 0; - SKIP_TOKEN(parser); - } - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type != YAML_FLOW_SEQUENCE_END_TOKEN) - { - if (!first) { - if (token->type == YAML_FLOW_ENTRY_TOKEN) { - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - } - else { - return yaml_parser_set_parser_error_context(parser, - "while parsing a flow sequence", POP(parser, parser->marks), - "did not find expected ',' or ']'", token->start_mark); - } - } - - if (token->type == YAML_KEY_TOKEN) { - parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE; - MAPPING_START_EVENT_INIT(*event, NULL, NULL, - 1, YAML_FLOW_MAPPING_STYLE, - token->start_mark, token->end_mark); - SKIP_TOKEN(parser); - return 1; - } - - else if (token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 0, 0); - } - } - - parser->state = POP(parser, parser->states); - dummy_mark = POP(parser, parser->marks); - SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->end_mark); - SKIP_TOKEN(parser); - return 1; -} - -/* - * Parse the productions: - * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? - * *** * - */ - -static int -yaml_parser_parse_flow_sequence_entry_mapping_key(yaml_parser_t *parser, - yaml_event_t *event) -{ - yaml_token_t *token; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type != YAML_VALUE_TOKEN && token->type != YAML_FLOW_ENTRY_TOKEN - && token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 0, 0); - } - else { - yaml_mark_t mark = token->end_mark; - SKIP_TOKEN(parser); - parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE; - return yaml_parser_process_empty_scalar(parser, event, mark); - } -} - -/* - * Parse the productions: - * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? - * ***** * - */ - -static int -yaml_parser_parse_flow_sequence_entry_mapping_value(yaml_parser_t *parser, - yaml_event_t *event) -{ - yaml_token_t *token; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type == YAML_VALUE_TOKEN) { - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - if (token->type != YAML_FLOW_ENTRY_TOKEN - && token->type != YAML_FLOW_SEQUENCE_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 0, 0); - } - } - parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE; - return yaml_parser_process_empty_scalar(parser, event, token->start_mark); -} - -/* - * Parse the productions: - * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? - * * - */ - -static int -yaml_parser_parse_flow_sequence_entry_mapping_end(yaml_parser_t *parser, - yaml_event_t *event) -{ - yaml_token_t *token; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE; - - MAPPING_END_EVENT_INIT(*event, token->start_mark, token->start_mark); - return 1; -} - -/* - * Parse the productions: - * flow_mapping ::= FLOW-MAPPING-START - * ****************** - * (flow_mapping_entry FLOW-ENTRY)* - * * ********** - * flow_mapping_entry? - * ****************** - * FLOW-MAPPING-END - * **************** - * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? - * * *** * - */ - -static int -yaml_parser_parse_flow_mapping_key(yaml_parser_t *parser, - yaml_event_t *event, int first) -{ - yaml_token_t *token; - yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */ - - if (first) { - token = PEEK_TOKEN(parser); - if (!PUSH(parser, parser->marks, token->start_mark)) - return 0; - SKIP_TOKEN(parser); - } - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (token->type != YAML_FLOW_MAPPING_END_TOKEN) - { - if (!first) { - if (token->type == YAML_FLOW_ENTRY_TOKEN) { - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - } - else { - return yaml_parser_set_parser_error_context(parser, - "while parsing a flow mapping", POP(parser, parser->marks), - "did not find expected ',' or '}'", token->start_mark); - } - } - - if (token->type == YAML_KEY_TOKEN) { - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - if (token->type != YAML_VALUE_TOKEN - && token->type != YAML_FLOW_ENTRY_TOKEN - && token->type != YAML_FLOW_MAPPING_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_FLOW_MAPPING_VALUE_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 0, 0); - } - else { - parser->state = YAML_PARSE_FLOW_MAPPING_VALUE_STATE; - return yaml_parser_process_empty_scalar(parser, event, - token->start_mark); - } - } - else if (token->type != YAML_FLOW_MAPPING_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 0, 0); - } - } - - parser->state = POP(parser, parser->states); - dummy_mark = POP(parser, parser->marks); - MAPPING_END_EVENT_INIT(*event, token->start_mark, token->end_mark); - SKIP_TOKEN(parser); - return 1; -} - -/* - * Parse the productions: - * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)? - * * ***** * - */ - -static int -yaml_parser_parse_flow_mapping_value(yaml_parser_t *parser, - yaml_event_t *event, int empty) -{ - yaml_token_t *token; - - token = PEEK_TOKEN(parser); - if (!token) return 0; - - if (empty) { - parser->state = YAML_PARSE_FLOW_MAPPING_KEY_STATE; - return yaml_parser_process_empty_scalar(parser, event, - token->start_mark); - } - - if (token->type == YAML_VALUE_TOKEN) { - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) return 0; - if (token->type != YAML_FLOW_ENTRY_TOKEN - && token->type != YAML_FLOW_MAPPING_END_TOKEN) { - if (!PUSH(parser, parser->states, - YAML_PARSE_FLOW_MAPPING_KEY_STATE)) - return 0; - return yaml_parser_parse_node(parser, event, 0, 0); - } - } - - parser->state = YAML_PARSE_FLOW_MAPPING_KEY_STATE; - return yaml_parser_process_empty_scalar(parser, event, token->start_mark); -} - -/* - * Generate an empty scalar event. - */ - -static int -yaml_parser_process_empty_scalar(yaml_parser_t *parser, yaml_event_t *event, - yaml_mark_t mark) -{ - yaml_char_t *value; - - value = yaml_malloc(1); - if (!value) { - parser->error = YAML_MEMORY_ERROR; - return 0; - } - value[0] = '\0'; - - SCALAR_EVENT_INIT(*event, NULL, NULL, value, 0, - 1, 0, YAML_PLAIN_SCALAR_STYLE, mark, mark); - - return 1; -} - -/* - * Parse directives. - */ - -static int -yaml_parser_process_directives(yaml_parser_t *parser, - yaml_version_directive_t **version_directive_ref, - yaml_tag_directive_t **tag_directives_start_ref, - yaml_tag_directive_t **tag_directives_end_ref) -{ - yaml_tag_directive_t default_tag_directives[] = { - {(yaml_char_t *)"!", (yaml_char_t *)"!"}, - {(yaml_char_t *)"!!", (yaml_char_t *)"tag:yaml.org,2002:"}, - {NULL, NULL} - }; - yaml_tag_directive_t *default_tag_directive; - yaml_version_directive_t *version_directive = NULL; - struct { - yaml_tag_directive_t *start; - yaml_tag_directive_t *end; - yaml_tag_directive_t *top; - } tag_directives = { NULL, NULL, NULL }; - yaml_token_t *token; - - if (!STACK_INIT(parser, tag_directives, INITIAL_STACK_SIZE)) - goto error; - - token = PEEK_TOKEN(parser); - if (!token) goto error; - - while (token->type == YAML_VERSION_DIRECTIVE_TOKEN || - token->type == YAML_TAG_DIRECTIVE_TOKEN) - { - if (token->type == YAML_VERSION_DIRECTIVE_TOKEN) { - if (version_directive) { - yaml_parser_set_parser_error(parser, - "found duplicate %YAML directive", token->start_mark); - goto error; - } - if (token->data.version_directive.major != 1 - || token->data.version_directive.minor != 1) { - yaml_parser_set_parser_error(parser, - "found incompatible YAML document", token->start_mark); - goto error; - } - version_directive = yaml_malloc(sizeof(yaml_version_directive_t)); - if (!version_directive) { - parser->error = YAML_MEMORY_ERROR; - goto error; - } - version_directive->major = token->data.version_directive.major; - version_directive->minor = token->data.version_directive.minor; - } - - else if (token->type == YAML_TAG_DIRECTIVE_TOKEN) { - yaml_tag_directive_t value = { - token->data.tag_directive.handle, - token->data.tag_directive.prefix - }; - if (!yaml_parser_append_tag_directive(parser, value, 0, - token->start_mark)) - goto error; - if (!PUSH(parser, tag_directives, value)) - goto error; - } - - SKIP_TOKEN(parser); - token = PEEK_TOKEN(parser); - if (!token) goto error; - } - - for (default_tag_directive = default_tag_directives; - default_tag_directive->handle; default_tag_directive++) { - if (!yaml_parser_append_tag_directive(parser, *default_tag_directive, 1, - token->start_mark)) - goto error; - } - - if (version_directive_ref) { - *version_directive_ref = version_directive; - } - if (tag_directives_start_ref) { - if (STACK_EMPTY(parser, tag_directives)) { - *tag_directives_start_ref = *tag_directives_end_ref = NULL; - STACK_DEL(parser, tag_directives); - } - else { - *tag_directives_start_ref = tag_directives.start; - *tag_directives_end_ref = tag_directives.top; - } - } - else { - STACK_DEL(parser, tag_directives); - } - - return 1; - -error: - yaml_free(version_directive); - while (!STACK_EMPTY(parser, tag_directives)) { - yaml_tag_directive_t tag_directive = POP(parser, tag_directives); - yaml_free(tag_directive.handle); - yaml_free(tag_directive.prefix); - } - STACK_DEL(parser, tag_directives); - return 0; -} - -/* - * Append a tag directive to the directives stack. - */ - -static int -yaml_parser_append_tag_directive(yaml_parser_t *parser, - yaml_tag_directive_t value, int allow_duplicates, yaml_mark_t mark) -{ - yaml_tag_directive_t *tag_directive; - yaml_tag_directive_t copy = { NULL, NULL }; - - for (tag_directive = parser->tag_directives.start; - tag_directive != parser->tag_directives.top; tag_directive ++) { - if (strcmp((char *)value.handle, (char *)tag_directive->handle) == 0) { - if (allow_duplicates) - return 1; - return yaml_parser_set_parser_error(parser, - "found duplicate %TAG directive", mark); - } - } - - copy.handle = yaml_strdup(value.handle); - copy.prefix = yaml_strdup(value.prefix); - if (!copy.handle || !copy.prefix) { - parser->error = YAML_MEMORY_ERROR; - goto error; - } - - if (!PUSH(parser, parser->tag_directives, copy)) - goto error; - - return 1; - -error: - yaml_free(copy.handle); - yaml_free(copy.prefix); - return 0; -} - ++/*+ * The parser implements the following grammar:+ *+ * stream ::= STREAM-START implicit_document? explicit_document* STREAM-END+ * implicit_document ::= block_node DOCUMENT-END*+ * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*+ * block_node_or_indentless_sequence ::=+ * ALIAS+ * | properties (block_content | indentless_block_sequence)?+ * | block_content+ * | indentless_block_sequence+ * block_node ::= ALIAS+ * | properties block_content?+ * | block_content+ * flow_node ::= ALIAS+ * | properties flow_content?+ * | flow_content+ * properties ::= TAG ANCHOR? | ANCHOR TAG?+ * block_content ::= block_collection | flow_collection | SCALAR+ * flow_content ::= flow_collection | SCALAR+ * block_collection ::= block_sequence | block_mapping+ * flow_collection ::= flow_sequence | flow_mapping+ * block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END+ * indentless_sequence ::= (BLOCK-ENTRY block_node?)++ * block_mapping ::= BLOCK-MAPPING_START+ * ((KEY block_node_or_indentless_sequence?)?+ * (VALUE block_node_or_indentless_sequence?)?)*+ * BLOCK-END+ * flow_sequence ::= FLOW-SEQUENCE-START+ * (flow_sequence_entry FLOW-ENTRY)*+ * flow_sequence_entry?+ * FLOW-SEQUENCE-END+ * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?+ * flow_mapping ::= FLOW-MAPPING-START+ * (flow_mapping_entry FLOW-ENTRY)*+ * flow_mapping_entry?+ * FLOW-MAPPING-END+ * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?+ */++#include "yaml_private.h"++/*+ * Peek the next token in the token queue.+ */++#define PEEK_TOKEN(parser) \+ ((parser->token_available || yaml_parser_fetch_more_tokens(parser)) ? \+ parser->tokens.head : NULL)++/*+ * Remove the next token from the queue (must be called after PEEK_TOKEN).+ */++#define SKIP_TOKEN(parser) \+ (parser->token_available = 0, \+ parser->tokens_parsed ++, \+ parser->stream_end_produced = \+ (parser->tokens.head->type == YAML_STREAM_END_TOKEN), \+ parser->tokens.head ++)++/*+ * Public API declarations.+ */++YAML_DECLARE(int)+yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event);++/*+ * Error handling.+ */++static int+yaml_parser_set_parser_error(yaml_parser_t *parser,+ const char *problem, yaml_mark_t problem_mark);++static int+yaml_parser_set_parser_error_context(yaml_parser_t *parser,+ const char *context, yaml_mark_t context_mark,+ const char *problem, yaml_mark_t problem_mark);++/*+ * State functions.+ */++static int+yaml_parser_state_machine(yaml_parser_t *parser, yaml_event_t *event);++static int+yaml_parser_parse_stream_start(yaml_parser_t *parser, yaml_event_t *event);++static int+yaml_parser_parse_document_start(yaml_parser_t *parser, yaml_event_t *event,+ int implicit);++static int+yaml_parser_parse_document_content(yaml_parser_t *parser, yaml_event_t *event);++static int+yaml_parser_parse_document_end(yaml_parser_t *parser, yaml_event_t *event);++static int+yaml_parser_parse_node(yaml_parser_t *parser, yaml_event_t *event,+ int block, int indentless_sequence);++static int+yaml_parser_parse_block_sequence_entry(yaml_parser_t *parser,+ yaml_event_t *event, int first);++static int+yaml_parser_parse_indentless_sequence_entry(yaml_parser_t *parser,+ yaml_event_t *event);++static int+yaml_parser_parse_block_mapping_key(yaml_parser_t *parser,+ yaml_event_t *event, int first);++static int+yaml_parser_parse_block_mapping_value(yaml_parser_t *parser,+ yaml_event_t *event);++static int+yaml_parser_parse_flow_sequence_entry(yaml_parser_t *parser,+ yaml_event_t *event, int first);++static int+yaml_parser_parse_flow_sequence_entry_mapping_key(yaml_parser_t *parser,+ yaml_event_t *event);++static int+yaml_parser_parse_flow_sequence_entry_mapping_value(yaml_parser_t *parser,+ yaml_event_t *event);++static int+yaml_parser_parse_flow_sequence_entry_mapping_end(yaml_parser_t *parser,+ yaml_event_t *event);++static int+yaml_parser_parse_flow_mapping_key(yaml_parser_t *parser,+ yaml_event_t *event, int first);++static int+yaml_parser_parse_flow_mapping_value(yaml_parser_t *parser,+ yaml_event_t *event, int empty);++/*+ * Utility functions.+ */++static int+yaml_parser_process_empty_scalar(yaml_parser_t *parser,+ yaml_event_t *event, yaml_mark_t mark);++static int+yaml_parser_process_directives(yaml_parser_t *parser,+ yaml_version_directive_t **version_directive_ref,+ yaml_tag_directive_t **tag_directives_start_ref,+ yaml_tag_directive_t **tag_directives_end_ref);++static int+yaml_parser_append_tag_directive(yaml_parser_t *parser,+ yaml_tag_directive_t value, int allow_duplicates, yaml_mark_t mark);++/*+ * Get the next event.+ */++YAML_DECLARE(int)+yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event)+{+ assert(parser); /* Non-NULL parser object is expected. */+ assert(event); /* Non-NULL event object is expected. */++ /* Erase the event object. */++ memset(event, 0, sizeof(yaml_event_t));++ /* No events after the end of the stream or error. */++ if (parser->stream_end_produced || parser->error ||+ parser->state == YAML_PARSE_END_STATE) {+ return 1;+ }++ /* Generate the next event. */++ return yaml_parser_state_machine(parser, event);+}++/*+ * Set parser error.+ */++static int+yaml_parser_set_parser_error(yaml_parser_t *parser,+ const char *problem, yaml_mark_t problem_mark)+{+ parser->error = YAML_PARSER_ERROR;+ parser->problem = problem;+ parser->problem_mark = problem_mark;++ return 0;+}++static int+yaml_parser_set_parser_error_context(yaml_parser_t *parser,+ const char *context, yaml_mark_t context_mark,+ const char *problem, yaml_mark_t problem_mark)+{+ parser->error = YAML_PARSER_ERROR;+ parser->context = context;+ parser->context_mark = context_mark;+ parser->problem = problem;+ parser->problem_mark = problem_mark;++ return 0;+}+++/*+ * State dispatcher.+ */++static int+yaml_parser_state_machine(yaml_parser_t *parser, yaml_event_t *event)+{+ switch (parser->state)+ {+ case YAML_PARSE_STREAM_START_STATE:+ return yaml_parser_parse_stream_start(parser, event);++ case YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE:+ return yaml_parser_parse_document_start(parser, event, 1);++ case YAML_PARSE_DOCUMENT_START_STATE:+ return yaml_parser_parse_document_start(parser, event, 0);++ case YAML_PARSE_DOCUMENT_CONTENT_STATE:+ return yaml_parser_parse_document_content(parser, event);++ case YAML_PARSE_DOCUMENT_END_STATE:+ return yaml_parser_parse_document_end(parser, event);++ case YAML_PARSE_BLOCK_NODE_STATE:+ return yaml_parser_parse_node(parser, event, 1, 0);++ case YAML_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE:+ return yaml_parser_parse_node(parser, event, 1, 1);++ case YAML_PARSE_FLOW_NODE_STATE:+ return yaml_parser_parse_node(parser, event, 0, 0);++ case YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE:+ return yaml_parser_parse_block_sequence_entry(parser, event, 1);++ case YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE:+ return yaml_parser_parse_block_sequence_entry(parser, event, 0);++ case YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE:+ return yaml_parser_parse_indentless_sequence_entry(parser, event);++ case YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE:+ return yaml_parser_parse_block_mapping_key(parser, event, 1);++ case YAML_PARSE_BLOCK_MAPPING_KEY_STATE:+ return yaml_parser_parse_block_mapping_key(parser, event, 0);++ case YAML_PARSE_BLOCK_MAPPING_VALUE_STATE:+ return yaml_parser_parse_block_mapping_value(parser, event);++ case YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE:+ return yaml_parser_parse_flow_sequence_entry(parser, event, 1);++ case YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE:+ return yaml_parser_parse_flow_sequence_entry(parser, event, 0);++ case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE:+ return yaml_parser_parse_flow_sequence_entry_mapping_key(parser, event);++ case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE:+ return yaml_parser_parse_flow_sequence_entry_mapping_value(parser, event);++ case YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE:+ return yaml_parser_parse_flow_sequence_entry_mapping_end(parser, event);++ case YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE:+ return yaml_parser_parse_flow_mapping_key(parser, event, 1);++ case YAML_PARSE_FLOW_MAPPING_KEY_STATE:+ return yaml_parser_parse_flow_mapping_key(parser, event, 0);++ case YAML_PARSE_FLOW_MAPPING_VALUE_STATE:+ return yaml_parser_parse_flow_mapping_value(parser, event, 0);++ case YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE:+ return yaml_parser_parse_flow_mapping_value(parser, event, 1);++ default:+ assert(1); /* Invalid state. */+ }++ return 0;+}++/*+ * Parse the production:+ * stream ::= STREAM-START implicit_document? explicit_document* STREAM-END+ * ************+ */++static int+yaml_parser_parse_stream_start(yaml_parser_t *parser, yaml_event_t *event)+{+ yaml_token_t *token;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type != YAML_STREAM_START_TOKEN) {+ return yaml_parser_set_parser_error(parser,+ "did not find expected <stream-start>", token->start_mark);+ }++ parser->state = YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE;+ STREAM_START_EVENT_INIT(*event, token->data.stream_start.encoding,+ token->start_mark, token->start_mark);+ SKIP_TOKEN(parser);++ return 1;+}++/*+ * Parse the productions:+ * implicit_document ::= block_node DOCUMENT-END*+ * *+ * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*+ * *************************+ */++static int+yaml_parser_parse_document_start(yaml_parser_t *parser, yaml_event_t *event,+ int implicit)+{+ yaml_token_t *token;+ yaml_version_directive_t *version_directive = NULL;+ struct {+ yaml_tag_directive_t *start;+ yaml_tag_directive_t *end;+ } tag_directives = { NULL, NULL };++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ /* Parse extra document end indicators. */++ if (!implicit)+ {+ while (token->type == YAML_DOCUMENT_END_TOKEN) {+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ }+ }++ /* Parse an implicit document. */++ if (implicit && token->type != YAML_VERSION_DIRECTIVE_TOKEN &&+ token->type != YAML_TAG_DIRECTIVE_TOKEN &&+ token->type != YAML_DOCUMENT_START_TOKEN &&+ token->type != YAML_STREAM_END_TOKEN)+ {+ if (!yaml_parser_process_directives(parser, NULL, NULL, NULL))+ return 0;+ if (!PUSH(parser, parser->states, YAML_PARSE_DOCUMENT_END_STATE))+ return 0;+ parser->state = YAML_PARSE_BLOCK_NODE_STATE;+ DOCUMENT_START_EVENT_INIT(*event, NULL, NULL, NULL, 1,+ token->start_mark, token->start_mark);+ return 1;+ }++ /* Parse an explicit document. */++ else if (token->type != YAML_STREAM_END_TOKEN)+ {+ yaml_mark_t start_mark, end_mark;+ start_mark = token->start_mark;+ if (!yaml_parser_process_directives(parser, &version_directive,+ &tag_directives.start, &tag_directives.end))+ return 0;+ token = PEEK_TOKEN(parser);+ if (!token) goto error;+ if (token->type != YAML_DOCUMENT_START_TOKEN) {+ yaml_parser_set_parser_error(parser,+ "did not find expected <document start>", token->start_mark);+ goto error;+ }+ if (!PUSH(parser, parser->states, YAML_PARSE_DOCUMENT_END_STATE))+ goto error;+ parser->state = YAML_PARSE_DOCUMENT_CONTENT_STATE;+ end_mark = token->end_mark;+ DOCUMENT_START_EVENT_INIT(*event, version_directive,+ tag_directives.start, tag_directives.end, 0,+ start_mark, end_mark);+ SKIP_TOKEN(parser);+ version_directive = NULL;+ tag_directives.start = tag_directives.end = NULL;+ return 1;+ }++ /* Parse the stream end. */++ else+ {+ parser->state = YAML_PARSE_END_STATE;+ STREAM_END_EVENT_INIT(*event, token->start_mark, token->end_mark);+ SKIP_TOKEN(parser);+ return 1;+ }++error:+ yaml_free(version_directive);+ while (tag_directives.start != tag_directives.end) {+ yaml_free(tag_directives.end[-1].handle);+ yaml_free(tag_directives.end[-1].prefix);+ tag_directives.end --;+ }+ yaml_free(tag_directives.start);+ return 0;+}++/*+ * Parse the productions:+ * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*+ * ***********+ */++static int+yaml_parser_parse_document_content(yaml_parser_t *parser, yaml_event_t *event)+{+ yaml_token_t *token;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type == YAML_VERSION_DIRECTIVE_TOKEN ||+ token->type == YAML_TAG_DIRECTIVE_TOKEN ||+ token->type == YAML_DOCUMENT_START_TOKEN ||+ token->type == YAML_DOCUMENT_END_TOKEN ||+ token->type == YAML_STREAM_END_TOKEN) {+ parser->state = POP(parser, parser->states);+ return yaml_parser_process_empty_scalar(parser, event,+ token->start_mark);+ }+ else {+ return yaml_parser_parse_node(parser, event, 1, 0);+ }+}++/*+ * Parse the productions:+ * implicit_document ::= block_node DOCUMENT-END*+ * *************+ * explicit_document ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*+ * *************+ */++static int+yaml_parser_parse_document_end(yaml_parser_t *parser, yaml_event_t *event)+{+ yaml_token_t *token;+ yaml_mark_t start_mark, end_mark;+ int implicit = 1;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ start_mark = end_mark = token->start_mark;++ if (token->type == YAML_DOCUMENT_END_TOKEN) {+ end_mark = token->end_mark;+ SKIP_TOKEN(parser);+ implicit = 0;+ }++ while (!STACK_EMPTY(parser, parser->tag_directives)) {+ yaml_tag_directive_t tag_directive = POP(parser, parser->tag_directives);+ yaml_free(tag_directive.handle);+ yaml_free(tag_directive.prefix);+ }++ parser->state = YAML_PARSE_DOCUMENT_START_STATE;+ DOCUMENT_END_EVENT_INIT(*event, implicit, start_mark, end_mark);++ return 1;+}++/*+ * Parse the productions:+ * block_node_or_indentless_sequence ::=+ * ALIAS+ * *****+ * | properties (block_content | indentless_block_sequence)?+ * ********** *+ * | block_content | indentless_block_sequence+ * *+ * block_node ::= ALIAS+ * *****+ * | properties block_content?+ * ********** *+ * | block_content+ * *+ * flow_node ::= ALIAS+ * *****+ * | properties flow_content?+ * ********** *+ * | flow_content+ * *+ * properties ::= TAG ANCHOR? | ANCHOR TAG?+ * *************************+ * block_content ::= block_collection | flow_collection | SCALAR+ * ******+ * flow_content ::= flow_collection | SCALAR+ * ******+ */++static int+yaml_parser_parse_node(yaml_parser_t *parser, yaml_event_t *event,+ int block, int indentless_sequence)+{+ yaml_token_t *token;+ yaml_char_t *anchor = NULL;+ yaml_char_t *tag_handle = NULL;+ yaml_char_t *tag_suffix = NULL;+ yaml_char_t *tag = NULL;+ yaml_mark_t start_mark, end_mark, tag_mark;+ int implicit;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type == YAML_ALIAS_TOKEN)+ {+ parser->state = POP(parser, parser->states);+ ALIAS_EVENT_INIT(*event, token->data.alias.value,+ token->start_mark, token->end_mark);+ SKIP_TOKEN(parser);+ return 1;+ }++ else+ {+ start_mark = end_mark = token->start_mark;++ if (token->type == YAML_ANCHOR_TOKEN)+ {+ anchor = token->data.anchor.value;+ start_mark = token->start_mark;+ end_mark = token->end_mark;+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) goto error;+ if (token->type == YAML_TAG_TOKEN)+ {+ tag_handle = token->data.tag.handle;+ tag_suffix = token->data.tag.suffix;+ tag_mark = token->start_mark;+ end_mark = token->end_mark;+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) goto error;+ }+ }+ else if (token->type == YAML_TAG_TOKEN)+ {+ tag_handle = token->data.tag.handle;+ tag_suffix = token->data.tag.suffix;+ start_mark = tag_mark = token->start_mark;+ end_mark = token->end_mark;+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) goto error;+ if (token->type == YAML_ANCHOR_TOKEN)+ {+ anchor = token->data.anchor.value;+ end_mark = token->end_mark;+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) goto error;+ }+ }++ if (tag_handle) {+ if (!*tag_handle) {+ tag = tag_suffix;+ yaml_free(tag_handle);+ tag_handle = tag_suffix = NULL;+ }+ else {+ yaml_tag_directive_t *tag_directive;+ for (tag_directive = parser->tag_directives.start;+ tag_directive != parser->tag_directives.top;+ tag_directive ++) {+ if (strcmp((char *)tag_directive->handle, (char *)tag_handle) == 0) {+ size_t prefix_len = strlen((char *)tag_directive->prefix);+ size_t suffix_len = strlen((char *)tag_suffix);+ tag = yaml_malloc(prefix_len+suffix_len+1);+ if (!tag) {+ parser->error = YAML_MEMORY_ERROR;+ goto error;+ }+ memcpy(tag, tag_directive->prefix, prefix_len);+ memcpy(tag+prefix_len, tag_suffix, suffix_len);+ tag[prefix_len+suffix_len] = '\0';+ yaml_free(tag_handle);+ yaml_free(tag_suffix);+ tag_handle = tag_suffix = NULL;+ break;+ }+ }+ if (!tag) {+ yaml_parser_set_parser_error_context(parser,+ "while parsing a node", start_mark,+ "found undefined tag handle", tag_mark);+ goto error;+ }+ }+ }++ implicit = (!tag || !*tag);+ if (indentless_sequence && token->type == YAML_BLOCK_ENTRY_TOKEN) {+ end_mark = token->end_mark;+ parser->state = YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE;+ SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit,+ YAML_BLOCK_SEQUENCE_STYLE, start_mark, end_mark);+ return 1;+ }+ else {+ if (token->type == YAML_SCALAR_TOKEN) {+ int plain_implicit = 0;+ int quoted_implicit = 0;+ end_mark = token->end_mark;+ if ((token->data.scalar.style == YAML_PLAIN_SCALAR_STYLE && !tag)+ || (tag && strcmp((char *)tag, "!") == 0)) {+ plain_implicit = 1;+ }+ else if (!tag) {+ quoted_implicit = 1;+ }+ parser->state = POP(parser, parser->states);+ SCALAR_EVENT_INIT(*event, anchor, tag,+ token->data.scalar.value, token->data.scalar.length,+ plain_implicit, quoted_implicit,+ token->data.scalar.style, start_mark, end_mark);+ SKIP_TOKEN(parser);+ return 1;+ }+ else if (token->type == YAML_FLOW_SEQUENCE_START_TOKEN) {+ end_mark = token->end_mark;+ parser->state = YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE;+ SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit,+ YAML_FLOW_SEQUENCE_STYLE, start_mark, end_mark);+ return 1;+ }+ else if (token->type == YAML_FLOW_MAPPING_START_TOKEN) {+ end_mark = token->end_mark;+ parser->state = YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE;+ MAPPING_START_EVENT_INIT(*event, anchor, tag, implicit,+ YAML_FLOW_MAPPING_STYLE, start_mark, end_mark);+ return 1;+ }+ else if (block && token->type == YAML_BLOCK_SEQUENCE_START_TOKEN) {+ end_mark = token->end_mark;+ parser->state = YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE;+ SEQUENCE_START_EVENT_INIT(*event, anchor, tag, implicit,+ YAML_BLOCK_SEQUENCE_STYLE, start_mark, end_mark);+ return 1;+ }+ else if (block && token->type == YAML_BLOCK_MAPPING_START_TOKEN) {+ end_mark = token->end_mark;+ parser->state = YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE;+ MAPPING_START_EVENT_INIT(*event, anchor, tag, implicit,+ YAML_BLOCK_MAPPING_STYLE, start_mark, end_mark);+ return 1;+ }+ else if (anchor || tag) {+ yaml_char_t *value = yaml_malloc(1);+ if (!value) {+ parser->error = YAML_MEMORY_ERROR;+ goto error;+ }+ value[0] = '\0';+ parser->state = POP(parser, parser->states);+ SCALAR_EVENT_INIT(*event, anchor, tag, value, 0,+ implicit, 0, YAML_PLAIN_SCALAR_STYLE,+ start_mark, end_mark);+ return 1;+ }+ else {+ yaml_parser_set_parser_error_context(parser,+ (block ? "while parsing a block node"+ : "while parsing a flow node"), start_mark,+ "did not find expected node content", token->start_mark);+ goto error;+ }+ }+ }++error:+ yaml_free(anchor);+ yaml_free(tag_handle);+ yaml_free(tag_suffix);+ yaml_free(tag);++ return 0;+}++/*+ * Parse the productions:+ * block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END+ * ******************** *********** * *********+ */++static int+yaml_parser_parse_block_sequence_entry(yaml_parser_t *parser,+ yaml_event_t *event, int first)+{+ yaml_token_t *token;++ if (first) {+ token = PEEK_TOKEN(parser);+ if (!PUSH(parser, parser->marks, token->start_mark))+ return 0;+ SKIP_TOKEN(parser);+ }++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type == YAML_BLOCK_ENTRY_TOKEN)+ {+ yaml_mark_t mark = token->end_mark;+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ if (token->type != YAML_BLOCK_ENTRY_TOKEN &&+ token->type != YAML_BLOCK_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 1, 0);+ }+ else {+ parser->state = YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE;+ return yaml_parser_process_empty_scalar(parser, event, mark);+ }+ }++ else if (token->type == YAML_BLOCK_END_TOKEN)+ {+ yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */+ parser->state = POP(parser, parser->states);+ dummy_mark = POP(parser, parser->marks);+ SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->end_mark);+ SKIP_TOKEN(parser);+ return 1;+ }++ else+ {+ return yaml_parser_set_parser_error_context(parser,+ "while parsing a block collection", POP(parser, parser->marks),+ "did not find expected '-' indicator", token->start_mark);+ }+}++/*+ * Parse the productions:+ * indentless_sequence ::= (BLOCK-ENTRY block_node?)++ * *********** *+ */++static int+yaml_parser_parse_indentless_sequence_entry(yaml_parser_t *parser,+ yaml_event_t *event)+{+ yaml_token_t *token;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type == YAML_BLOCK_ENTRY_TOKEN)+ {+ yaml_mark_t mark = token->end_mark;+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ if (token->type != YAML_BLOCK_ENTRY_TOKEN &&+ token->type != YAML_KEY_TOKEN &&+ token->type != YAML_VALUE_TOKEN &&+ token->type != YAML_BLOCK_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 1, 0);+ }+ else {+ parser->state = YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE;+ return yaml_parser_process_empty_scalar(parser, event, mark);+ }+ }++ else+ {+ parser->state = POP(parser, parser->states);+ SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->start_mark);+ return 1;+ }+}++/*+ * Parse the productions:+ * block_mapping ::= BLOCK-MAPPING_START+ * *******************+ * ((KEY block_node_or_indentless_sequence?)?+ * *** *+ * (VALUE block_node_or_indentless_sequence?)?)*+ *+ * BLOCK-END+ * *********+ */++static int+yaml_parser_parse_block_mapping_key(yaml_parser_t *parser,+ yaml_event_t *event, int first)+{+ yaml_token_t *token;++ if (first) {+ token = PEEK_TOKEN(parser);+ if (!PUSH(parser, parser->marks, token->start_mark))+ return 0;+ SKIP_TOKEN(parser);+ }++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type == YAML_KEY_TOKEN)+ {+ yaml_mark_t mark = token->end_mark;+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ if (token->type != YAML_KEY_TOKEN &&+ token->type != YAML_VALUE_TOKEN &&+ token->type != YAML_BLOCK_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_BLOCK_MAPPING_VALUE_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 1, 1);+ }+ else {+ parser->state = YAML_PARSE_BLOCK_MAPPING_VALUE_STATE;+ return yaml_parser_process_empty_scalar(parser, event, mark);+ }+ }++ else if (token->type == YAML_BLOCK_END_TOKEN)+ {+ yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */+ parser->state = POP(parser, parser->states);+ dummy_mark = POP(parser, parser->marks);+ MAPPING_END_EVENT_INIT(*event, token->start_mark, token->end_mark);+ SKIP_TOKEN(parser);+ return 1;+ }++ else+ {+ return yaml_parser_set_parser_error_context(parser,+ "while parsing a block mapping", POP(parser, parser->marks),+ "did not find expected key", token->start_mark);+ }+}++/*+ * Parse the productions:+ * block_mapping ::= BLOCK-MAPPING_START+ *+ * ((KEY block_node_or_indentless_sequence?)?+ *+ * (VALUE block_node_or_indentless_sequence?)?)*+ * ***** *+ * BLOCK-END+ *+ */++static int+yaml_parser_parse_block_mapping_value(yaml_parser_t *parser,+ yaml_event_t *event)+{+ yaml_token_t *token;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type == YAML_VALUE_TOKEN)+ {+ yaml_mark_t mark = token->end_mark;+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ if (token->type != YAML_KEY_TOKEN &&+ token->type != YAML_VALUE_TOKEN &&+ token->type != YAML_BLOCK_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_BLOCK_MAPPING_KEY_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 1, 1);+ }+ else {+ parser->state = YAML_PARSE_BLOCK_MAPPING_KEY_STATE;+ return yaml_parser_process_empty_scalar(parser, event, mark);+ }+ }++ else+ {+ parser->state = YAML_PARSE_BLOCK_MAPPING_KEY_STATE;+ return yaml_parser_process_empty_scalar(parser, event, token->start_mark);+ }+}++/*+ * Parse the productions:+ * flow_sequence ::= FLOW-SEQUENCE-START+ * *******************+ * (flow_sequence_entry FLOW-ENTRY)*+ * * **********+ * flow_sequence_entry?+ * *+ * FLOW-SEQUENCE-END+ * *****************+ * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?+ * *+ */++static int+yaml_parser_parse_flow_sequence_entry(yaml_parser_t *parser,+ yaml_event_t *event, int first)+{+ yaml_token_t *token;+ yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */++ if (first) {+ token = PEEK_TOKEN(parser);+ if (!PUSH(parser, parser->marks, token->start_mark))+ return 0;+ SKIP_TOKEN(parser);+ }++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type != YAML_FLOW_SEQUENCE_END_TOKEN)+ {+ if (!first) {+ if (token->type == YAML_FLOW_ENTRY_TOKEN) {+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ }+ else {+ return yaml_parser_set_parser_error_context(parser,+ "while parsing a flow sequence", POP(parser, parser->marks),+ "did not find expected ',' or ']'", token->start_mark);+ }+ }++ if (token->type == YAML_KEY_TOKEN) {+ parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE;+ MAPPING_START_EVENT_INIT(*event, NULL, NULL,+ 1, YAML_FLOW_MAPPING_STYLE,+ token->start_mark, token->end_mark);+ SKIP_TOKEN(parser);+ return 1;+ }++ else if (token->type != YAML_FLOW_SEQUENCE_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 0, 0);+ }+ }++ parser->state = POP(parser, parser->states);+ dummy_mark = POP(parser, parser->marks);+ SEQUENCE_END_EVENT_INIT(*event, token->start_mark, token->end_mark);+ SKIP_TOKEN(parser);+ return 1;+}++/*+ * Parse the productions:+ * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?+ * *** *+ */++static int+yaml_parser_parse_flow_sequence_entry_mapping_key(yaml_parser_t *parser,+ yaml_event_t *event)+{+ yaml_token_t *token;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type != YAML_VALUE_TOKEN && token->type != YAML_FLOW_ENTRY_TOKEN+ && token->type != YAML_FLOW_SEQUENCE_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 0, 0);+ }+ else {+ yaml_mark_t mark = token->end_mark;+ SKIP_TOKEN(parser);+ parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE;+ return yaml_parser_process_empty_scalar(parser, event, mark);+ }+}++/*+ * Parse the productions:+ * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?+ * ***** *+ */++static int+yaml_parser_parse_flow_sequence_entry_mapping_value(yaml_parser_t *parser,+ yaml_event_t *event)+{+ yaml_token_t *token;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type == YAML_VALUE_TOKEN) {+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ if (token->type != YAML_FLOW_ENTRY_TOKEN+ && token->type != YAML_FLOW_SEQUENCE_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 0, 0);+ }+ }+ parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE;+ return yaml_parser_process_empty_scalar(parser, event, token->start_mark);+}++/*+ * Parse the productions:+ * flow_sequence_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?+ * *+ */++static int+yaml_parser_parse_flow_sequence_entry_mapping_end(yaml_parser_t *parser,+ yaml_event_t *event)+{+ yaml_token_t *token;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ parser->state = YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE;++ MAPPING_END_EVENT_INIT(*event, token->start_mark, token->start_mark);+ return 1;+}++/*+ * Parse the productions:+ * flow_mapping ::= FLOW-MAPPING-START+ * ******************+ * (flow_mapping_entry FLOW-ENTRY)*+ * * **********+ * flow_mapping_entry?+ * ******************+ * FLOW-MAPPING-END+ * ****************+ * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?+ * * *** *+ */++static int+yaml_parser_parse_flow_mapping_key(yaml_parser_t *parser,+ yaml_event_t *event, int first)+{+ yaml_token_t *token;+ yaml_mark_t dummy_mark; /* Used to eliminate a compiler warning. */++ if (first) {+ token = PEEK_TOKEN(parser);+ if (!PUSH(parser, parser->marks, token->start_mark))+ return 0;+ SKIP_TOKEN(parser);+ }++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (token->type != YAML_FLOW_MAPPING_END_TOKEN)+ {+ if (!first) {+ if (token->type == YAML_FLOW_ENTRY_TOKEN) {+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ }+ else {+ return yaml_parser_set_parser_error_context(parser,+ "while parsing a flow mapping", POP(parser, parser->marks),+ "did not find expected ',' or '}'", token->start_mark);+ }+ }++ if (token->type == YAML_KEY_TOKEN) {+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ if (token->type != YAML_VALUE_TOKEN+ && token->type != YAML_FLOW_ENTRY_TOKEN+ && token->type != YAML_FLOW_MAPPING_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_FLOW_MAPPING_VALUE_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 0, 0);+ }+ else {+ parser->state = YAML_PARSE_FLOW_MAPPING_VALUE_STATE;+ return yaml_parser_process_empty_scalar(parser, event,+ token->start_mark);+ }+ }+ else if (token->type != YAML_FLOW_MAPPING_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 0, 0);+ }+ }++ parser->state = POP(parser, parser->states);+ dummy_mark = POP(parser, parser->marks);+ MAPPING_END_EVENT_INIT(*event, token->start_mark, token->end_mark);+ SKIP_TOKEN(parser);+ return 1;+}++/*+ * Parse the productions:+ * flow_mapping_entry ::= flow_node | KEY flow_node? (VALUE flow_node?)?+ * * ***** *+ */++static int+yaml_parser_parse_flow_mapping_value(yaml_parser_t *parser,+ yaml_event_t *event, int empty)+{+ yaml_token_t *token;++ token = PEEK_TOKEN(parser);+ if (!token) return 0;++ if (empty) {+ parser->state = YAML_PARSE_FLOW_MAPPING_KEY_STATE;+ return yaml_parser_process_empty_scalar(parser, event,+ token->start_mark);+ }++ if (token->type == YAML_VALUE_TOKEN) {+ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) return 0;+ if (token->type != YAML_FLOW_ENTRY_TOKEN+ && token->type != YAML_FLOW_MAPPING_END_TOKEN) {+ if (!PUSH(parser, parser->states,+ YAML_PARSE_FLOW_MAPPING_KEY_STATE))+ return 0;+ return yaml_parser_parse_node(parser, event, 0, 0);+ }+ }++ parser->state = YAML_PARSE_FLOW_MAPPING_KEY_STATE;+ return yaml_parser_process_empty_scalar(parser, event, token->start_mark);+}++/*+ * Generate an empty scalar event.+ */++static int+yaml_parser_process_empty_scalar(yaml_parser_t *parser, yaml_event_t *event,+ yaml_mark_t mark)+{+ yaml_char_t *value;++ value = yaml_malloc(1);+ if (!value) {+ parser->error = YAML_MEMORY_ERROR;+ return 0;+ }+ value[0] = '\0';++ SCALAR_EVENT_INIT(*event, NULL, NULL, value, 0,+ 1, 0, YAML_PLAIN_SCALAR_STYLE, mark, mark);++ return 1;+}++/*+ * Parse directives.+ */++static int+yaml_parser_process_directives(yaml_parser_t *parser,+ yaml_version_directive_t **version_directive_ref,+ yaml_tag_directive_t **tag_directives_start_ref,+ yaml_tag_directive_t **tag_directives_end_ref)+{+ yaml_tag_directive_t default_tag_directives[] = {+ {(yaml_char_t *)"!", (yaml_char_t *)"!"},+ {(yaml_char_t *)"!!", (yaml_char_t *)"tag:yaml.org,2002:"},+ {NULL, NULL}+ };+ yaml_tag_directive_t *default_tag_directive;+ yaml_version_directive_t *version_directive = NULL;+ struct {+ yaml_tag_directive_t *start;+ yaml_tag_directive_t *end;+ yaml_tag_directive_t *top;+ } tag_directives = { NULL, NULL, NULL };+ yaml_token_t *token;++ if (!STACK_INIT(parser, tag_directives, INITIAL_STACK_SIZE))+ goto error;++ token = PEEK_TOKEN(parser);+ if (!token) goto error;++ while (token->type == YAML_VERSION_DIRECTIVE_TOKEN ||+ token->type == YAML_TAG_DIRECTIVE_TOKEN)+ {+ if (token->type == YAML_VERSION_DIRECTIVE_TOKEN) {+ if (version_directive) {+ yaml_parser_set_parser_error(parser,+ "found duplicate %YAML directive", token->start_mark);+ goto error;+ }+ if (token->data.version_directive.major != 1+ || token->data.version_directive.minor != 1) {+ yaml_parser_set_parser_error(parser,+ "found incompatible YAML document", token->start_mark);+ goto error;+ }+ version_directive = yaml_malloc(sizeof(yaml_version_directive_t));+ if (!version_directive) {+ parser->error = YAML_MEMORY_ERROR;+ goto error;+ }+ version_directive->major = token->data.version_directive.major;+ version_directive->minor = token->data.version_directive.minor;+ }++ else if (token->type == YAML_TAG_DIRECTIVE_TOKEN) {+ yaml_tag_directive_t value = {+ token->data.tag_directive.handle,+ token->data.tag_directive.prefix+ };+ if (!yaml_parser_append_tag_directive(parser, value, 0,+ token->start_mark))+ goto error;+ if (!PUSH(parser, tag_directives, value))+ goto error;+ }++ SKIP_TOKEN(parser);+ token = PEEK_TOKEN(parser);+ if (!token) goto error;+ }+ + for (default_tag_directive = default_tag_directives;+ default_tag_directive->handle; default_tag_directive++) {+ if (!yaml_parser_append_tag_directive(parser, *default_tag_directive, 1,+ token->start_mark))+ goto error;+ }++ if (version_directive_ref) {+ *version_directive_ref = version_directive;+ }+ if (tag_directives_start_ref) {+ if (STACK_EMPTY(parser, tag_directives)) {+ *tag_directives_start_ref = *tag_directives_end_ref = NULL;+ STACK_DEL(parser, tag_directives);+ }+ else {+ *tag_directives_start_ref = tag_directives.start;+ *tag_directives_end_ref = tag_directives.top;+ }+ }+ else {+ STACK_DEL(parser, tag_directives);+ }++ return 1;++error:+ yaml_free(version_directive);+ while (!STACK_EMPTY(parser, tag_directives)) {+ yaml_tag_directive_t tag_directive = POP(parser, tag_directives);+ yaml_free(tag_directive.handle);+ yaml_free(tag_directive.prefix);+ }+ STACK_DEL(parser, tag_directives);+ return 0;+}++/*+ * Append a tag directive to the directives stack.+ */++static int+yaml_parser_append_tag_directive(yaml_parser_t *parser,+ yaml_tag_directive_t value, int allow_duplicates, yaml_mark_t mark)+{+ yaml_tag_directive_t *tag_directive;+ yaml_tag_directive_t copy = { NULL, NULL };++ for (tag_directive = parser->tag_directives.start;+ tag_directive != parser->tag_directives.top; tag_directive ++) {+ if (strcmp((char *)value.handle, (char *)tag_directive->handle) == 0) {+ if (allow_duplicates)+ return 1;+ return yaml_parser_set_parser_error(parser,+ "found duplicate %TAG directive", mark);+ }+ }++ copy.handle = yaml_strdup(value.handle);+ copy.prefix = yaml_strdup(value.prefix);+ if (!copy.handle || !copy.prefix) {+ parser->error = YAML_MEMORY_ERROR;+ goto error;+ }++ if (!PUSH(parser, parser->tag_directives, copy))+ goto error;++ return 1;++error:+ yaml_free(copy.handle);+ yaml_free(copy.prefix);+ return 0;+}+
libyaml/reader.c view
@@ -1,460 +1,460 @@- -#include "yaml_private.h" - -/* - * Declarations. - */ - -static int -yaml_parser_set_reader_error(yaml_parser_t *parser, const char *problem, - size_t offset, int value); - -static int -yaml_parser_update_raw_buffer(yaml_parser_t *parser); - -static int -yaml_parser_determine_encoding(yaml_parser_t *parser); - -YAML_DECLARE(int) -yaml_parser_update_buffer(yaml_parser_t *parser, size_t length); - -/* - * Set the reader error and return 0. - */ - -static int -yaml_parser_set_reader_error(yaml_parser_t *parser, const char *problem, - size_t offset, int value) -{ - parser->error = YAML_READER_ERROR; - parser->problem = problem; - parser->problem_offset = offset; - parser->problem_value = value; - - return 0; -} - -/* - * Byte order marks. - */ - -#define BOM_UTF8 "\xef\xbb\xbf" -#define BOM_UTF16LE "\xff\xfe" -#define BOM_UTF16BE "\xfe\xff" - -/* - * Determine the input stream encoding by checking the BOM symbol. If no BOM is - * found, the UTF-8 encoding is assumed. Return 1 on success, 0 on failure. - */ - -static int -yaml_parser_determine_encoding(yaml_parser_t *parser) -{ - /* Ensure that we had enough bytes in the raw buffer. */ - - while (!parser->eof - && parser->raw_buffer.last - parser->raw_buffer.pointer < 3) { - if (!yaml_parser_update_raw_buffer(parser)) { - return 0; - } - } - - /* Determine the encoding. */ - - if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 2 - && !memcmp(parser->raw_buffer.pointer, BOM_UTF16LE, 2)) { - parser->encoding = YAML_UTF16LE_ENCODING; - parser->raw_buffer.pointer += 2; - parser->offset += 2; - } - else if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 2 - && !memcmp(parser->raw_buffer.pointer, BOM_UTF16BE, 2)) { - parser->encoding = YAML_UTF16BE_ENCODING; - parser->raw_buffer.pointer += 2; - parser->offset += 2; - } - else if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 3 - && !memcmp(parser->raw_buffer.pointer, BOM_UTF8, 3)) { - parser->encoding = YAML_UTF8_ENCODING; - parser->raw_buffer.pointer += 3; - parser->offset += 3; - } - else { - parser->encoding = YAML_UTF8_ENCODING; - } - - return 1; -} - -/* - * Update the raw buffer. - */ - -static int -yaml_parser_update_raw_buffer(yaml_parser_t *parser) -{ - size_t size_read = 0; - - /* Return if the raw buffer is full. */ - - if (parser->raw_buffer.start == parser->raw_buffer.pointer - && parser->raw_buffer.last == parser->raw_buffer.end) - return 1; - - /* Return on EOF. */ - - if (parser->eof) return 1; - - /* Move the remaining bytes in the raw buffer to the beginning. */ - - if (parser->raw_buffer.start < parser->raw_buffer.pointer - && parser->raw_buffer.pointer < parser->raw_buffer.last) { - memmove(parser->raw_buffer.start, parser->raw_buffer.pointer, - parser->raw_buffer.last - parser->raw_buffer.pointer); - } - parser->raw_buffer.last -= - parser->raw_buffer.pointer - parser->raw_buffer.start; - parser->raw_buffer.pointer = parser->raw_buffer.start; - - /* Call the read handler to fill the buffer. */ - - if (!parser->read_handler(parser->read_handler_data, parser->raw_buffer.last, - parser->raw_buffer.end - parser->raw_buffer.last, &size_read)) { - return yaml_parser_set_reader_error(parser, "Input error", - parser->offset, -1); - } - parser->raw_buffer.last += size_read; - if (!size_read) { - parser->eof = 1; - } - - return 1; -} - -/* - * Ensure that the buffer contains at least `length` characters. - * Return 1 on success, 0 on failure. - * - * The length is supposed to be significantly less that the buffer size. - */ - -YAML_DECLARE(int) -yaml_parser_update_buffer(yaml_parser_t *parser, size_t length) -{ - assert(parser->read_handler); /* Read handler must be set. */ - - /* If the EOF flag is set and the raw buffer is empty, do nothing. */ - - if (parser->eof && parser->raw_buffer.pointer == parser->raw_buffer.last) - return 1; - - /* Return if the buffer contains enough characters. */ - - if (parser->unread >= length) - return 1; - - /* Determine the input encoding if it is not known yet. */ - - if (!parser->encoding) { - if (!yaml_parser_determine_encoding(parser)) - return 0; - } - - /* Move the unread characters to the beginning of the buffer. */ - - if (parser->buffer.start < parser->buffer.pointer - && parser->buffer.pointer < parser->buffer.last) { - size_t size = parser->buffer.last - parser->buffer.pointer; - memmove(parser->buffer.start, parser->buffer.pointer, size); - parser->buffer.pointer = parser->buffer.start; - parser->buffer.last = parser->buffer.start + size; - } - else if (parser->buffer.pointer == parser->buffer.last) { - parser->buffer.pointer = parser->buffer.start; - parser->buffer.last = parser->buffer.start; - } - - /* Fill the buffer until it has enough characters. */ - - while (parser->unread < length) - { - /* Fill the raw buffer. */ - - if (!yaml_parser_update_raw_buffer(parser)) return 0; - - /* Decode the raw buffer. */ - - while (parser->raw_buffer.pointer != parser->raw_buffer.last) - { - unsigned int value = 0, value2 = 0; - int incomplete = 0; - unsigned char octet; - unsigned int width = 0; - int low, high; - size_t k; - size_t raw_unread = parser->raw_buffer.last - parser->raw_buffer.pointer; - - /* Decode the next character. */ - - switch (parser->encoding) - { - case YAML_UTF8_ENCODING: - - /* - * Decode a UTF-8 character. Check RFC 3629 - * (http://www.ietf.org/rfc/rfc3629.txt) for more details. - * - * The following table (taken from the RFC) is used for - * decoding. - * - * Char. number range | UTF-8 octet sequence - * (hexadecimal) | (binary) - * --------------------+------------------------------------ - * 0000 0000-0000 007F | 0xxxxxxx - * 0000 0080-0000 07FF | 110xxxxx 10xxxxxx - * 0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx - * 0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx - * - * Additionally, the characters in the range 0xD800-0xDFFF - * are prohibited as they are reserved for use with UTF-16 - * surrogate pairs. - */ - - /* Determine the length of the UTF-8 sequence. */ - - octet = parser->raw_buffer.pointer[0]; - width = (octet & 0x80) == 0x00 ? 1 : - (octet & 0xE0) == 0xC0 ? 2 : - (octet & 0xF0) == 0xE0 ? 3 : - (octet & 0xF8) == 0xF0 ? 4 : 0; - - /* Check if the leading octet is valid. */ - - if (!width) - return yaml_parser_set_reader_error(parser, - "Invalid leading UTF-8 octet", - parser->offset, octet); - - /* Check if the raw buffer contains an incomplete character. */ - - if (width > raw_unread) { - if (parser->eof) { - return yaml_parser_set_reader_error(parser, - "Incomplete UTF-8 octet sequence", - parser->offset, -1); - } - incomplete = 1; - break; - } - - /* Decode the leading octet. */ - - value = (octet & 0x80) == 0x00 ? octet & 0x7F : - (octet & 0xE0) == 0xC0 ? octet & 0x1F : - (octet & 0xF0) == 0xE0 ? octet & 0x0F : - (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0; - - /* Check and decode the trailing octets. */ - - for (k = 1; k < width; k ++) - { - octet = parser->raw_buffer.pointer[k]; - - /* Check if the octet is valid. */ - - if ((octet & 0xC0) != 0x80) - return yaml_parser_set_reader_error(parser, - "Invalid trailing UTF-8 octet", - parser->offset+k, octet); - - /* Decode the octet. */ - - value = (value << 6) + (octet & 0x3F); - } - - /* Check the length of the sequence against the value. */ - - if (!((width == 1) || - (width == 2 && value >= 0x80) || - (width == 3 && value >= 0x800) || - (width == 4 && value >= 0x10000))) - return yaml_parser_set_reader_error(parser, - "Invalid length of a UTF-8 sequence", - parser->offset, -1); - - /* Check the range of the value. */ - - if ((value >= 0xD800 && value <= 0xDFFF) || value > 0x10FFFF) - return yaml_parser_set_reader_error(parser, - "Invalid Unicode character", - parser->offset, value); - - break; - - case YAML_UTF16LE_ENCODING: - case YAML_UTF16BE_ENCODING: - - low = (parser->encoding == YAML_UTF16LE_ENCODING ? 0 : 1); - high = (parser->encoding == YAML_UTF16LE_ENCODING ? 1 : 0); - - /* - * The UTF-16 encoding is not as simple as one might - * naively think. Check RFC 2781 - * (http://www.ietf.org/rfc/rfc2781.txt). - * - * Normally, two subsequent bytes describe a Unicode - * character. However a special technique (called a - * surrogate pair) is used for specifying character - * values larger than 0xFFFF. - * - * A surrogate pair consists of two pseudo-characters: - * high surrogate area (0xD800-0xDBFF) - * low surrogate area (0xDC00-0xDFFF) - * - * The following formulas are used for decoding - * and encoding characters using surrogate pairs: - * - * U = U' + 0x10000 (0x01 00 00 <= U <= 0x10 FF FF) - * U' = yyyyyyyyyyxxxxxxxxxx (0 <= U' <= 0x0F FF FF) - * W1 = 110110yyyyyyyyyy - * W2 = 110111xxxxxxxxxx - * - * where U is the character value, W1 is the high surrogate - * area, W2 is the low surrogate area. - */ - - /* Check for incomplete UTF-16 character. */ - - if (raw_unread < 2) { - if (parser->eof) { - return yaml_parser_set_reader_error(parser, - "Incomplete UTF-16 character", - parser->offset, -1); - } - incomplete = 1; - break; - } - - /* Get the character. */ - - value = parser->raw_buffer.pointer[low] - + (parser->raw_buffer.pointer[high] << 8); - - /* Check for unexpected low surrogate area. */ - - if ((value & 0xFC00) == 0xDC00) - return yaml_parser_set_reader_error(parser, - "Unexpected low surrogate area", - parser->offset, value); - - /* Check for a high surrogate area. */ - - if ((value & 0xFC00) == 0xD800) { - - width = 4; - - /* Check for incomplete surrogate pair. */ - - if (raw_unread < 4) { - if (parser->eof) { - return yaml_parser_set_reader_error(parser, - "Incomplete UTF-16 surrogate pair", - parser->offset, -1); - } - incomplete = 1; - break; - } - - /* Get the next character. */ - - value2 = parser->raw_buffer.pointer[low+2] - + (parser->raw_buffer.pointer[high+2] << 8); - - /* Check for a low surrogate area. */ - - if ((value2 & 0xFC00) != 0xDC00) - return yaml_parser_set_reader_error(parser, - "Expected low surrogate area", - parser->offset+2, value2); - - /* Generate the value of the surrogate pair. */ - - value = 0x10000 + ((value & 0x3FF) << 10) + (value2 & 0x3FF); - } - - else { - width = 2; - } - - break; - - default: - assert(1); /* Impossible. */ - } - - /* Check if the raw buffer contains enough bytes to form a character. */ - - if (incomplete) break; - - /* - * Check if the character is in the allowed range: - * #x9 | #xA | #xD | [#x20-#x7E] (8 bit) - * | #x85 | [#xA0-#xD7FF] | [#xE000-#xFFFD] (16 bit) - * | [#x10000-#x10FFFF] (32 bit) - */ - - if (! (value == 0x09 || value == 0x0A || value == 0x0D - || (value >= 0x20 && value <= 0x7E) - || (value == 0x85) || (value >= 0xA0 && value <= 0xD7FF) - || (value >= 0xE000 && value <= 0xFFFD) - || (value >= 0x10000 && value <= 0x10FFFF))) - return yaml_parser_set_reader_error(parser, - "Control characters are not allowed", - parser->offset, value); - - /* Move the raw pointers. */ - - parser->raw_buffer.pointer += width; - parser->offset += width; - - /* Finally put the character into the buffer. */ - - /* 0000 0000-0000 007F -> 0xxxxxxx */ - if (value <= 0x7F) { - *(parser->buffer.last++) = value; - } - /* 0000 0080-0000 07FF -> 110xxxxx 10xxxxxx */ - else if (value <= 0x7FF) { - *(parser->buffer.last++) = 0xC0 + (value >> 6); - *(parser->buffer.last++) = 0x80 + (value & 0x3F); - } - /* 0000 0800-0000 FFFF -> 1110xxxx 10xxxxxx 10xxxxxx */ - else if (value <= 0xFFFF) { - *(parser->buffer.last++) = 0xE0 + (value >> 12); - *(parser->buffer.last++) = 0x80 + ((value >> 6) & 0x3F); - *(parser->buffer.last++) = 0x80 + (value & 0x3F); - } - /* 0001 0000-0010 FFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */ - else { - *(parser->buffer.last++) = 0xF0 + (value >> 18); - *(parser->buffer.last++) = 0x80 + ((value >> 12) & 0x3F); - *(parser->buffer.last++) = 0x80 + ((value >> 6) & 0x3F); - *(parser->buffer.last++) = 0x80 + (value & 0x3F); - } - - parser->unread ++; - } - - /* On EOF, put NUL into the buffer and return. */ - - if (parser->eof) { - *(parser->buffer.last++) = '\0'; - parser->unread ++; - return 1; - } - - } - - return 1; -} - ++#include "yaml_private.h"++/*+ * Declarations.+ */++static int+yaml_parser_set_reader_error(yaml_parser_t *parser, const char *problem,+ size_t offset, int value);++static int+yaml_parser_update_raw_buffer(yaml_parser_t *parser);++static int+yaml_parser_determine_encoding(yaml_parser_t *parser);++YAML_DECLARE(int)+yaml_parser_update_buffer(yaml_parser_t *parser, size_t length);++/*+ * Set the reader error and return 0.+ */++static int+yaml_parser_set_reader_error(yaml_parser_t *parser, const char *problem,+ size_t offset, int value)+{+ parser->error = YAML_READER_ERROR;+ parser->problem = problem;+ parser->problem_offset = offset;+ parser->problem_value = value;++ return 0;+}++/*+ * Byte order marks.+ */++#define BOM_UTF8 "\xef\xbb\xbf"+#define BOM_UTF16LE "\xff\xfe"+#define BOM_UTF16BE "\xfe\xff"++/*+ * Determine the input stream encoding by checking the BOM symbol. If no BOM is+ * found, the UTF-8 encoding is assumed. Return 1 on success, 0 on failure.+ */++static int+yaml_parser_determine_encoding(yaml_parser_t *parser)+{+ /* Ensure that we had enough bytes in the raw buffer. */++ while (!parser->eof + && parser->raw_buffer.last - parser->raw_buffer.pointer < 3) {+ if (!yaml_parser_update_raw_buffer(parser)) {+ return 0;+ }+ }++ /* Determine the encoding. */++ if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 2+ && !memcmp(parser->raw_buffer.pointer, BOM_UTF16LE, 2)) {+ parser->encoding = YAML_UTF16LE_ENCODING;+ parser->raw_buffer.pointer += 2;+ parser->offset += 2;+ }+ else if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 2+ && !memcmp(parser->raw_buffer.pointer, BOM_UTF16BE, 2)) {+ parser->encoding = YAML_UTF16BE_ENCODING;+ parser->raw_buffer.pointer += 2;+ parser->offset += 2;+ }+ else if (parser->raw_buffer.last - parser->raw_buffer.pointer >= 3+ && !memcmp(parser->raw_buffer.pointer, BOM_UTF8, 3)) {+ parser->encoding = YAML_UTF8_ENCODING;+ parser->raw_buffer.pointer += 3;+ parser->offset += 3;+ }+ else {+ parser->encoding = YAML_UTF8_ENCODING;+ }++ return 1;+}++/*+ * Update the raw buffer.+ */++static int+yaml_parser_update_raw_buffer(yaml_parser_t *parser)+{+ size_t size_read = 0;++ /* Return if the raw buffer is full. */++ if (parser->raw_buffer.start == parser->raw_buffer.pointer+ && parser->raw_buffer.last == parser->raw_buffer.end)+ return 1;++ /* Return on EOF. */++ if (parser->eof) return 1;++ /* Move the remaining bytes in the raw buffer to the beginning. */++ if (parser->raw_buffer.start < parser->raw_buffer.pointer+ && parser->raw_buffer.pointer < parser->raw_buffer.last) {+ memmove(parser->raw_buffer.start, parser->raw_buffer.pointer,+ parser->raw_buffer.last - parser->raw_buffer.pointer);+ }+ parser->raw_buffer.last -=+ parser->raw_buffer.pointer - parser->raw_buffer.start;+ parser->raw_buffer.pointer = parser->raw_buffer.start;++ /* Call the read handler to fill the buffer. */++ if (!parser->read_handler(parser->read_handler_data, parser->raw_buffer.last,+ parser->raw_buffer.end - parser->raw_buffer.last, &size_read)) {+ return yaml_parser_set_reader_error(parser, "Input error",+ parser->offset, -1);+ }+ parser->raw_buffer.last += size_read;+ if (!size_read) {+ parser->eof = 1;+ }++ return 1;+}++/*+ * Ensure that the buffer contains at least `length` characters.+ * Return 1 on success, 0 on failure.+ *+ * The length is supposed to be significantly less that the buffer size.+ */++YAML_DECLARE(int)+yaml_parser_update_buffer(yaml_parser_t *parser, size_t length)+{+ assert(parser->read_handler); /* Read handler must be set. */++ /* If the EOF flag is set and the raw buffer is empty, do nothing. */++ if (parser->eof && parser->raw_buffer.pointer == parser->raw_buffer.last)+ return 1;++ /* Return if the buffer contains enough characters. */++ if (parser->unread >= length)+ return 1;++ /* Determine the input encoding if it is not known yet. */++ if (!parser->encoding) {+ if (!yaml_parser_determine_encoding(parser))+ return 0;+ }++ /* Move the unread characters to the beginning of the buffer. */++ if (parser->buffer.start < parser->buffer.pointer+ && parser->buffer.pointer < parser->buffer.last) {+ size_t size = parser->buffer.last - parser->buffer.pointer;+ memmove(parser->buffer.start, parser->buffer.pointer, size);+ parser->buffer.pointer = parser->buffer.start;+ parser->buffer.last = parser->buffer.start + size;+ }+ else if (parser->buffer.pointer == parser->buffer.last) {+ parser->buffer.pointer = parser->buffer.start;+ parser->buffer.last = parser->buffer.start;+ }++ /* Fill the buffer until it has enough characters. */++ while (parser->unread < length)+ {+ /* Fill the raw buffer. */++ if (!yaml_parser_update_raw_buffer(parser)) return 0;++ /* Decode the raw buffer. */++ while (parser->raw_buffer.pointer != parser->raw_buffer.last)+ {+ unsigned int value = 0, value2 = 0;+ int incomplete = 0;+ unsigned char octet;+ unsigned int width = 0;+ int low, high;+ size_t k;+ size_t raw_unread = parser->raw_buffer.last - parser->raw_buffer.pointer;++ /* Decode the next character. */++ switch (parser->encoding)+ {+ case YAML_UTF8_ENCODING:++ /*+ * Decode a UTF-8 character. Check RFC 3629+ * (http://www.ietf.org/rfc/rfc3629.txt) for more details.+ *+ * The following table (taken from the RFC) is used for+ * decoding.+ *+ * Char. number range | UTF-8 octet sequence+ * (hexadecimal) | (binary)+ * --------------------+------------------------------------+ * 0000 0000-0000 007F | 0xxxxxxx+ * 0000 0080-0000 07FF | 110xxxxx 10xxxxxx+ * 0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx+ * 0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx+ *+ * Additionally, the characters in the range 0xD800-0xDFFF+ * are prohibited as they are reserved for use with UTF-16+ * surrogate pairs.+ */++ /* Determine the length of the UTF-8 sequence. */++ octet = parser->raw_buffer.pointer[0];+ width = (octet & 0x80) == 0x00 ? 1 :+ (octet & 0xE0) == 0xC0 ? 2 :+ (octet & 0xF0) == 0xE0 ? 3 :+ (octet & 0xF8) == 0xF0 ? 4 : 0;++ /* Check if the leading octet is valid. */++ if (!width)+ return yaml_parser_set_reader_error(parser,+ "Invalid leading UTF-8 octet",+ parser->offset, octet);++ /* Check if the raw buffer contains an incomplete character. */++ if (width > raw_unread) {+ if (parser->eof) {+ return yaml_parser_set_reader_error(parser,+ "Incomplete UTF-8 octet sequence",+ parser->offset, -1);+ }+ incomplete = 1;+ break;+ }++ /* Decode the leading octet. */++ value = (octet & 0x80) == 0x00 ? octet & 0x7F :+ (octet & 0xE0) == 0xC0 ? octet & 0x1F :+ (octet & 0xF0) == 0xE0 ? octet & 0x0F :+ (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0;++ /* Check and decode the trailing octets. */++ for (k = 1; k < width; k ++)+ {+ octet = parser->raw_buffer.pointer[k];++ /* Check if the octet is valid. */++ if ((octet & 0xC0) != 0x80)+ return yaml_parser_set_reader_error(parser,+ "Invalid trailing UTF-8 octet",+ parser->offset+k, octet);++ /* Decode the octet. */++ value = (value << 6) + (octet & 0x3F);+ }++ /* Check the length of the sequence against the value. */++ if (!((width == 1) ||+ (width == 2 && value >= 0x80) ||+ (width == 3 && value >= 0x800) ||+ (width == 4 && value >= 0x10000)))+ return yaml_parser_set_reader_error(parser,+ "Invalid length of a UTF-8 sequence",+ parser->offset, -1);++ /* Check the range of the value. */++ if ((value >= 0xD800 && value <= 0xDFFF) || value > 0x10FFFF)+ return yaml_parser_set_reader_error(parser,+ "Invalid Unicode character",+ parser->offset, value);++ break;+ + case YAML_UTF16LE_ENCODING:+ case YAML_UTF16BE_ENCODING:++ low = (parser->encoding == YAML_UTF16LE_ENCODING ? 0 : 1);+ high = (parser->encoding == YAML_UTF16LE_ENCODING ? 1 : 0);++ /*+ * The UTF-16 encoding is not as simple as one might+ * naively think. Check RFC 2781+ * (http://www.ietf.org/rfc/rfc2781.txt).+ *+ * Normally, two subsequent bytes describe a Unicode+ * character. However a special technique (called a+ * surrogate pair) is used for specifying character+ * values larger than 0xFFFF.+ *+ * A surrogate pair consists of two pseudo-characters:+ * high surrogate area (0xD800-0xDBFF)+ * low surrogate area (0xDC00-0xDFFF)+ *+ * The following formulas are used for decoding+ * and encoding characters using surrogate pairs:+ * + * U = U' + 0x10000 (0x01 00 00 <= U <= 0x10 FF FF)+ * U' = yyyyyyyyyyxxxxxxxxxx (0 <= U' <= 0x0F FF FF)+ * W1 = 110110yyyyyyyyyy+ * W2 = 110111xxxxxxxxxx+ *+ * where U is the character value, W1 is the high surrogate+ * area, W2 is the low surrogate area.+ */++ /* Check for incomplete UTF-16 character. */++ if (raw_unread < 2) {+ if (parser->eof) {+ return yaml_parser_set_reader_error(parser,+ "Incomplete UTF-16 character",+ parser->offset, -1);+ }+ incomplete = 1;+ break;+ }++ /* Get the character. */++ value = parser->raw_buffer.pointer[low]+ + (parser->raw_buffer.pointer[high] << 8);++ /* Check for unexpected low surrogate area. */++ if ((value & 0xFC00) == 0xDC00)+ return yaml_parser_set_reader_error(parser,+ "Unexpected low surrogate area",+ parser->offset, value);++ /* Check for a high surrogate area. */++ if ((value & 0xFC00) == 0xD800) {++ width = 4;++ /* Check for incomplete surrogate pair. */++ if (raw_unread < 4) {+ if (parser->eof) {+ return yaml_parser_set_reader_error(parser,+ "Incomplete UTF-16 surrogate pair",+ parser->offset, -1);+ }+ incomplete = 1;+ break;+ }++ /* Get the next character. */++ value2 = parser->raw_buffer.pointer[low+2]+ + (parser->raw_buffer.pointer[high+2] << 8);++ /* Check for a low surrogate area. */++ if ((value2 & 0xFC00) != 0xDC00)+ return yaml_parser_set_reader_error(parser,+ "Expected low surrogate area",+ parser->offset+2, value2);++ /* Generate the value of the surrogate pair. */++ value = 0x10000 + ((value & 0x3FF) << 10) + (value2 & 0x3FF);+ }++ else {+ width = 2;+ }++ break;++ default:+ assert(1); /* Impossible. */+ }++ /* Check if the raw buffer contains enough bytes to form a character. */++ if (incomplete) break;++ /*+ * Check if the character is in the allowed range:+ * #x9 | #xA | #xD | [#x20-#x7E] (8 bit)+ * | #x85 | [#xA0-#xD7FF] | [#xE000-#xFFFD] (16 bit)+ * | [#x10000-#x10FFFF] (32 bit)+ */++ if (! (value == 0x09 || value == 0x0A || value == 0x0D+ || (value >= 0x20 && value <= 0x7E)+ || (value == 0x85) || (value >= 0xA0 && value <= 0xD7FF)+ || (value >= 0xE000 && value <= 0xFFFD)+ || (value >= 0x10000 && value <= 0x10FFFF)))+ return yaml_parser_set_reader_error(parser,+ "Control characters are not allowed",+ parser->offset, value);++ /* Move the raw pointers. */++ parser->raw_buffer.pointer += width;+ parser->offset += width;++ /* Finally put the character into the buffer. */++ /* 0000 0000-0000 007F -> 0xxxxxxx */+ if (value <= 0x7F) {+ *(parser->buffer.last++) = value;+ }+ /* 0000 0080-0000 07FF -> 110xxxxx 10xxxxxx */+ else if (value <= 0x7FF) {+ *(parser->buffer.last++) = 0xC0 + (value >> 6);+ *(parser->buffer.last++) = 0x80 + (value & 0x3F);+ }+ /* 0000 0800-0000 FFFF -> 1110xxxx 10xxxxxx 10xxxxxx */+ else if (value <= 0xFFFF) {+ *(parser->buffer.last++) = 0xE0 + (value >> 12);+ *(parser->buffer.last++) = 0x80 + ((value >> 6) & 0x3F);+ *(parser->buffer.last++) = 0x80 + (value & 0x3F);+ }+ /* 0001 0000-0010 FFFF -> 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */+ else {+ *(parser->buffer.last++) = 0xF0 + (value >> 18);+ *(parser->buffer.last++) = 0x80 + ((value >> 12) & 0x3F);+ *(parser->buffer.last++) = 0x80 + ((value >> 6) & 0x3F);+ *(parser->buffer.last++) = 0x80 + (value & 0x3F);+ }++ parser->unread ++;+ }++ /* On EOF, put NUL into the buffer and return. */++ if (parser->eof) {+ *(parser->buffer.last++) = '\0';+ parser->unread ++;+ return 1;+ }++ }++ return 1;+}+
libyaml/scanner.c view
@@ -1,3568 +1,3568 @@- -/* - * Introduction - * ************ - * - * The following notes assume that you are familiar with the YAML specification - * (http://yaml.org/spec/cvs/current.html). We mostly follow it, although in - * some cases we are less restrictive that it requires. - * - * The process of transforming a YAML stream into a sequence of events is - * divided on two steps: Scanning and Parsing. - * - * The Scanner transforms the input stream into a sequence of tokens, while the - * parser transform the sequence of tokens produced by the Scanner into a - * sequence of parsing events. - * - * The Scanner is rather clever and complicated. The Parser, on the contrary, - * is a straightforward implementation of a recursive-descendant parser (or, - * LL(1) parser, as it is usually called). - * - * Actually there are two issues of Scanning that might be called "clever", the - * rest is quite straightforward. The issues are "block collection start" and - * "simple keys". Both issues are explained below in details. - * - * Here the Scanning step is explained and implemented. We start with the list - * of all the tokens produced by the Scanner together with short descriptions. - * - * Now, tokens: - * - * STREAM-START(encoding) # The stream start. - * STREAM-END # The stream end. - * VERSION-DIRECTIVE(major,minor) # The '%YAML' directive. - * TAG-DIRECTIVE(handle,prefix) # The '%TAG' directive. - * DOCUMENT-START # '---' - * DOCUMENT-END # '...' - * BLOCK-SEQUENCE-START # Indentation increase denoting a block - * BLOCK-MAPPING-START # sequence or a block mapping. - * BLOCK-END # Indentation decrease. - * FLOW-SEQUENCE-START # '[' - * FLOW-SEQUENCE-END # ']' - * BLOCK-SEQUENCE-START # '{' - * BLOCK-SEQUENCE-END # '}' - * BLOCK-ENTRY # '-' - * FLOW-ENTRY # ',' - * KEY # '?' or nothing (simple keys). - * VALUE # ':' - * ALIAS(anchor) # '*anchor' - * ANCHOR(anchor) # '&anchor' - * TAG(handle,suffix) # '!handle!suffix' - * SCALAR(value,style) # A scalar. - * - * The following two tokens are "virtual" tokens denoting the beginning and the - * end of the stream: - * - * STREAM-START(encoding) - * STREAM-END - * - * We pass the information about the input stream encoding with the - * STREAM-START token. - * - * The next two tokens are responsible for tags: - * - * VERSION-DIRECTIVE(major,minor) - * TAG-DIRECTIVE(handle,prefix) - * - * Example: - * - * %YAML 1.1 - * %TAG ! !foo - * %TAG !yaml! tag:yaml.org,2002: - * --- - * - * The correspoding sequence of tokens: - * - * STREAM-START(utf-8) - * VERSION-DIRECTIVE(1,1) - * TAG-DIRECTIVE("!","!foo") - * TAG-DIRECTIVE("!yaml","tag:yaml.org,2002:") - * DOCUMENT-START - * STREAM-END - * - * Note that the VERSION-DIRECTIVE and TAG-DIRECTIVE tokens occupy a whole - * line. - * - * The document start and end indicators are represented by: - * - * DOCUMENT-START - * DOCUMENT-END - * - * Note that if a YAML stream contains an implicit document (without '---' - * and '...' indicators), no DOCUMENT-START and DOCUMENT-END tokens will be - * produced. - * - * In the following examples, we present whole documents together with the - * produced tokens. - * - * 1. An implicit document: - * - * 'a scalar' - * - * Tokens: - * - * STREAM-START(utf-8) - * SCALAR("a scalar",single-quoted) - * STREAM-END - * - * 2. An explicit document: - * - * --- - * 'a scalar' - * ... - * - * Tokens: - * - * STREAM-START(utf-8) - * DOCUMENT-START - * SCALAR("a scalar",single-quoted) - * DOCUMENT-END - * STREAM-END - * - * 3. Several documents in a stream: - * - * 'a scalar' - * --- - * 'another scalar' - * --- - * 'yet another scalar' - * - * Tokens: - * - * STREAM-START(utf-8) - * SCALAR("a scalar",single-quoted) - * DOCUMENT-START - * SCALAR("another scalar",single-quoted) - * DOCUMENT-START - * SCALAR("yet another scalar",single-quoted) - * STREAM-END - * - * We have already introduced the SCALAR token above. The following tokens are - * used to describe aliases, anchors, tag, and scalars: - * - * ALIAS(anchor) - * ANCHOR(anchor) - * TAG(handle,suffix) - * SCALAR(value,style) - * - * The following series of examples illustrate the usage of these tokens: - * - * 1. A recursive sequence: - * - * &A [ *A ] - * - * Tokens: - * - * STREAM-START(utf-8) - * ANCHOR("A") - * FLOW-SEQUENCE-START - * ALIAS("A") - * FLOW-SEQUENCE-END - * STREAM-END - * - * 2. A tagged scalar: - * - * !!float "3.14" # A good approximation. - * - * Tokens: - * - * STREAM-START(utf-8) - * TAG("!!","float") - * SCALAR("3.14",double-quoted) - * STREAM-END - * - * 3. Various scalar styles: - * - * --- # Implicit empty plain scalars do not produce tokens. - * --- a plain scalar - * --- 'a single-quoted scalar' - * --- "a double-quoted scalar" - * --- |- - * a literal scalar - * --- >- - * a folded - * scalar - * - * Tokens: - * - * STREAM-START(utf-8) - * DOCUMENT-START - * DOCUMENT-START - * SCALAR("a plain scalar",plain) - * DOCUMENT-START - * SCALAR("a single-quoted scalar",single-quoted) - * DOCUMENT-START - * SCALAR("a double-quoted scalar",double-quoted) - * DOCUMENT-START - * SCALAR("a literal scalar",literal) - * DOCUMENT-START - * SCALAR("a folded scalar",folded) - * STREAM-END - * - * Now it's time to review collection-related tokens. We will start with - * flow collections: - * - * FLOW-SEQUENCE-START - * FLOW-SEQUENCE-END - * FLOW-MAPPING-START - * FLOW-MAPPING-END - * FLOW-ENTRY - * KEY - * VALUE - * - * The tokens FLOW-SEQUENCE-START, FLOW-SEQUENCE-END, FLOW-MAPPING-START, and - * FLOW-MAPPING-END represent the indicators '[', ']', '{', and '}' - * correspondingly. FLOW-ENTRY represent the ',' indicator. Finally the - * indicators '?' and ':', which are used for denoting mapping keys and values, - * are represented by the KEY and VALUE tokens. - * - * The following examples show flow collections: - * - * 1. A flow sequence: - * - * [item 1, item 2, item 3] - * - * Tokens: - * - * STREAM-START(utf-8) - * FLOW-SEQUENCE-START - * SCALAR("item 1",plain) - * FLOW-ENTRY - * SCALAR("item 2",plain) - * FLOW-ENTRY - * SCALAR("item 3",plain) - * FLOW-SEQUENCE-END - * STREAM-END - * - * 2. A flow mapping: - * - * { - * a simple key: a value, # Note that the KEY token is produced. - * ? a complex key: another value, - * } - * - * Tokens: - * - * STREAM-START(utf-8) - * FLOW-MAPPING-START - * KEY - * SCALAR("a simple key",plain) - * VALUE - * SCALAR("a value",plain) - * FLOW-ENTRY - * KEY - * SCALAR("a complex key",plain) - * VALUE - * SCALAR("another value",plain) - * FLOW-ENTRY - * FLOW-MAPPING-END - * STREAM-END - * - * A simple key is a key which is not denoted by the '?' indicator. Note that - * the Scanner still produce the KEY token whenever it encounters a simple key. - * - * For scanning block collections, the following tokens are used (note that we - * repeat KEY and VALUE here): - * - * BLOCK-SEQUENCE-START - * BLOCK-MAPPING-START - * BLOCK-END - * BLOCK-ENTRY - * KEY - * VALUE - * - * The tokens BLOCK-SEQUENCE-START and BLOCK-MAPPING-START denote indentation - * increase that precedes a block collection (cf. the INDENT token in Python). - * The token BLOCK-END denote indentation decrease that ends a block collection - * (cf. the DEDENT token in Python). However YAML has some syntax pecularities - * that makes detections of these tokens more complex. - * - * The tokens BLOCK-ENTRY, KEY, and VALUE are used to represent the indicators - * '-', '?', and ':' correspondingly. - * - * The following examples show how the tokens BLOCK-SEQUENCE-START, - * BLOCK-MAPPING-START, and BLOCK-END are emitted by the Scanner: - * - * 1. Block sequences: - * - * - item 1 - * - item 2 - * - - * - item 3.1 - * - item 3.2 - * - - * key 1: value 1 - * key 2: value 2 - * - * Tokens: - * - * STREAM-START(utf-8) - * BLOCK-SEQUENCE-START - * BLOCK-ENTRY - * SCALAR("item 1",plain) - * BLOCK-ENTRY - * SCALAR("item 2",plain) - * BLOCK-ENTRY - * BLOCK-SEQUENCE-START - * BLOCK-ENTRY - * SCALAR("item 3.1",plain) - * BLOCK-ENTRY - * SCALAR("item 3.2",plain) - * BLOCK-END - * BLOCK-ENTRY - * BLOCK-MAPPING-START - * KEY - * SCALAR("key 1",plain) - * VALUE - * SCALAR("value 1",plain) - * KEY - * SCALAR("key 2",plain) - * VALUE - * SCALAR("value 2",plain) - * BLOCK-END - * BLOCK-END - * STREAM-END - * - * 2. Block mappings: - * - * a simple key: a value # The KEY token is produced here. - * ? a complex key - * : another value - * a mapping: - * key 1: value 1 - * key 2: value 2 - * a sequence: - * - item 1 - * - item 2 - * - * Tokens: - * - * STREAM-START(utf-8) - * BLOCK-MAPPING-START - * KEY - * SCALAR("a simple key",plain) - * VALUE - * SCALAR("a value",plain) - * KEY - * SCALAR("a complex key",plain) - * VALUE - * SCALAR("another value",plain) - * KEY - * SCALAR("a mapping",plain) - * BLOCK-MAPPING-START - * KEY - * SCALAR("key 1",plain) - * VALUE - * SCALAR("value 1",plain) - * KEY - * SCALAR("key 2",plain) - * VALUE - * SCALAR("value 2",plain) - * BLOCK-END - * KEY - * SCALAR("a sequence",plain) - * VALUE - * BLOCK-SEQUENCE-START - * BLOCK-ENTRY - * SCALAR("item 1",plain) - * BLOCK-ENTRY - * SCALAR("item 2",plain) - * BLOCK-END - * BLOCK-END - * STREAM-END - * - * YAML does not always require to start a new block collection from a new - * line. If the current line contains only '-', '?', and ':' indicators, a new - * block collection may start at the current line. The following examples - * illustrate this case: - * - * 1. Collections in a sequence: - * - * - - item 1 - * - item 2 - * - key 1: value 1 - * key 2: value 2 - * - ? complex key - * : complex value - * - * Tokens: - * - * STREAM-START(utf-8) - * BLOCK-SEQUENCE-START - * BLOCK-ENTRY - * BLOCK-SEQUENCE-START - * BLOCK-ENTRY - * SCALAR("item 1",plain) - * BLOCK-ENTRY - * SCALAR("item 2",plain) - * BLOCK-END - * BLOCK-ENTRY - * BLOCK-MAPPING-START - * KEY - * SCALAR("key 1",plain) - * VALUE - * SCALAR("value 1",plain) - * KEY - * SCALAR("key 2",plain) - * VALUE - * SCALAR("value 2",plain) - * BLOCK-END - * BLOCK-ENTRY - * BLOCK-MAPPING-START - * KEY - * SCALAR("complex key") - * VALUE - * SCALAR("complex value") - * BLOCK-END - * BLOCK-END - * STREAM-END - * - * 2. Collections in a mapping: - * - * ? a sequence - * : - item 1 - * - item 2 - * ? a mapping - * : key 1: value 1 - * key 2: value 2 - * - * Tokens: - * - * STREAM-START(utf-8) - * BLOCK-MAPPING-START - * KEY - * SCALAR("a sequence",plain) - * VALUE - * BLOCK-SEQUENCE-START - * BLOCK-ENTRY - * SCALAR("item 1",plain) - * BLOCK-ENTRY - * SCALAR("item 2",plain) - * BLOCK-END - * KEY - * SCALAR("a mapping",plain) - * VALUE - * BLOCK-MAPPING-START - * KEY - * SCALAR("key 1",plain) - * VALUE - * SCALAR("value 1",plain) - * KEY - * SCALAR("key 2",plain) - * VALUE - * SCALAR("value 2",plain) - * BLOCK-END - * BLOCK-END - * STREAM-END - * - * YAML also permits non-indented sequences if they are included into a block - * mapping. In this case, the token BLOCK-SEQUENCE-START is not produced: - * - * key: - * - item 1 # BLOCK-SEQUENCE-START is NOT produced here. - * - item 2 - * - * Tokens: - * - * STREAM-START(utf-8) - * BLOCK-MAPPING-START - * KEY - * SCALAR("key",plain) - * VALUE - * BLOCK-ENTRY - * SCALAR("item 1",plain) - * BLOCK-ENTRY - * SCALAR("item 2",plain) - * BLOCK-END - */ - -#include "yaml_private.h" - -/* - * Ensure that the buffer contains the required number of characters. - * Return 1 on success, 0 on failure (reader error or memory error). - */ - -#define CACHE(parser,length) \ - (parser->unread >= (length) \ - ? 1 \ - : yaml_parser_update_buffer(parser, (length))) - -/* - * Advance the buffer pointer. - */ - -#define SKIP(parser) \ - (parser->mark.index ++, \ - parser->mark.column ++, \ - parser->unread --, \ - parser->buffer.pointer += WIDTH(parser->buffer)) - -#define SKIP_LINE(parser) \ - (IS_CRLF(parser->buffer) ? \ - (parser->mark.index += 2, \ - parser->mark.column = 0, \ - parser->mark.line ++, \ - parser->unread -= 2, \ - parser->buffer.pointer += 2) : \ - IS_BREAK(parser->buffer) ? \ - (parser->mark.index ++, \ - parser->mark.column = 0, \ - parser->mark.line ++, \ - parser->unread --, \ - parser->buffer.pointer += WIDTH(parser->buffer)) : 0) - -/* - * Copy a character to a string buffer and advance pointers. - */ - -#define READ(parser,string) \ - (STRING_EXTEND(parser,string) ? \ - (COPY(string,parser->buffer), \ - parser->mark.index ++, \ - parser->mark.column ++, \ - parser->unread --, \ - 1) : 0) - -/* - * Copy a line break character to a string buffer and advance pointers. - */ - -#define READ_LINE(parser,string) \ - (STRING_EXTEND(parser,string) ? \ - (((CHECK_AT(parser->buffer,'\r',0) \ - && CHECK_AT(parser->buffer,'\n',1)) ? /* CR LF -> LF */ \ - (*((string).pointer++) = (yaml_char_t) '\n', \ - parser->buffer.pointer += 2, \ - parser->mark.index += 2, \ - parser->mark.column = 0, \ - parser->mark.line ++, \ - parser->unread -= 2) : \ - (CHECK_AT(parser->buffer,'\r',0) \ - || CHECK_AT(parser->buffer,'\n',0)) ? /* CR|LF -> LF */ \ - (*((string).pointer++) = (yaml_char_t) '\n', \ - parser->buffer.pointer ++, \ - parser->mark.index ++, \ - parser->mark.column = 0, \ - parser->mark.line ++, \ - parser->unread --) : \ - (CHECK_AT(parser->buffer,'\xC2',0) \ - && CHECK_AT(parser->buffer,'\x85',1)) ? /* NEL -> LF */ \ - (*((string).pointer++) = (yaml_char_t) '\n', \ - parser->buffer.pointer += 2, \ - parser->mark.index ++, \ - parser->mark.column = 0, \ - parser->mark.line ++, \ - parser->unread --) : \ - (CHECK_AT(parser->buffer,'\xE2',0) && \ - CHECK_AT(parser->buffer,'\x80',1) && \ - (CHECK_AT(parser->buffer,'\xA8',2) || \ - CHECK_AT(parser->buffer,'\xA9',2))) ? /* LS|PS -> LS|PS */ \ - (*((string).pointer++) = *(parser->buffer.pointer++), \ - *((string).pointer++) = *(parser->buffer.pointer++), \ - *((string).pointer++) = *(parser->buffer.pointer++), \ - parser->mark.index ++, \ - parser->mark.column = 0, \ - parser->mark.line ++, \ - parser->unread --) : 0), \ - 1) : 0) - -/* - * Public API declarations. - */ - -YAML_DECLARE(int) -yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token); - -/* - * Error handling. - */ - -static int -yaml_parser_set_scanner_error(yaml_parser_t *parser, const char *context, - yaml_mark_t context_mark, const char *problem); - -/* - * High-level token API. - */ - -YAML_DECLARE(int) -yaml_parser_fetch_more_tokens(yaml_parser_t *parser); - -static int -yaml_parser_fetch_next_token(yaml_parser_t *parser); - -/* - * Potential simple keys. - */ - -static int -yaml_parser_stale_simple_keys(yaml_parser_t *parser); - -static int -yaml_parser_save_simple_key(yaml_parser_t *parser); - -static int -yaml_parser_remove_simple_key(yaml_parser_t *parser); - -static int -yaml_parser_increase_flow_level(yaml_parser_t *parser); - -static int -yaml_parser_decrease_flow_level(yaml_parser_t *parser); - -/* - * Indentation treatment. - */ - -static int -yaml_parser_roll_indent(yaml_parser_t *parser, int column, - int number, yaml_token_type_t type, yaml_mark_t mark); - -static int -yaml_parser_unroll_indent(yaml_parser_t *parser, int column); - -/* - * Token fetchers. - */ - -static int -yaml_parser_fetch_stream_start(yaml_parser_t *parser); - -static int -yaml_parser_fetch_stream_end(yaml_parser_t *parser); - -static int -yaml_parser_fetch_directive(yaml_parser_t *parser); - -static int -yaml_parser_fetch_document_indicator(yaml_parser_t *parser, - yaml_token_type_t type); - -static int -yaml_parser_fetch_flow_collection_start(yaml_parser_t *parser, - yaml_token_type_t type); - -static int -yaml_parser_fetch_flow_collection_end(yaml_parser_t *parser, - yaml_token_type_t type); - -static int -yaml_parser_fetch_flow_entry(yaml_parser_t *parser); - -static int -yaml_parser_fetch_block_entry(yaml_parser_t *parser); - -static int -yaml_parser_fetch_key(yaml_parser_t *parser); - -static int -yaml_parser_fetch_value(yaml_parser_t *parser); - -static int -yaml_parser_fetch_anchor(yaml_parser_t *parser, yaml_token_type_t type); - -static int -yaml_parser_fetch_tag(yaml_parser_t *parser); - -static int -yaml_parser_fetch_block_scalar(yaml_parser_t *parser, int literal); - -static int -yaml_parser_fetch_flow_scalar(yaml_parser_t *parser, int single); - -static int -yaml_parser_fetch_plain_scalar(yaml_parser_t *parser); - -/* - * Token scanners. - */ - -static int -yaml_parser_scan_to_next_token(yaml_parser_t *parser); - -static int -yaml_parser_scan_directive(yaml_parser_t *parser, yaml_token_t *token); - -static int -yaml_parser_scan_directive_name(yaml_parser_t *parser, - yaml_mark_t start_mark, yaml_char_t **name); - -static int -yaml_parser_scan_version_directive_value(yaml_parser_t *parser, - yaml_mark_t start_mark, int *major, int *minor); - -static int -yaml_parser_scan_version_directive_number(yaml_parser_t *parser, - yaml_mark_t start_mark, int *number); - -static int -yaml_parser_scan_tag_directive_value(yaml_parser_t *parser, - yaml_mark_t mark, yaml_char_t **handle, yaml_char_t **prefix); - -static int -yaml_parser_scan_anchor(yaml_parser_t *parser, yaml_token_t *token, - yaml_token_type_t type); - -static int -yaml_parser_scan_tag(yaml_parser_t *parser, yaml_token_t *token); - -static int -yaml_parser_scan_tag_handle(yaml_parser_t *parser, int directive, - yaml_mark_t start_mark, yaml_char_t **handle); - -static int -yaml_parser_scan_tag_uri(yaml_parser_t *parser, int directive, - yaml_char_t *head, yaml_mark_t start_mark, yaml_char_t **uri); - -static int -yaml_parser_scan_uri_escapes(yaml_parser_t *parser, int directive, - yaml_mark_t start_mark, yaml_string_t *string); - -static int -yaml_parser_scan_block_scalar(yaml_parser_t *parser, yaml_token_t *token, - int literal); - -static int -yaml_parser_scan_block_scalar_breaks(yaml_parser_t *parser, - int *indent, yaml_string_t *breaks, - yaml_mark_t start_mark, yaml_mark_t *end_mark); - -static int -yaml_parser_scan_flow_scalar(yaml_parser_t *parser, yaml_token_t *token, - int single); - -static int -yaml_parser_scan_plain_scalar(yaml_parser_t *parser, yaml_token_t *token); - -/* - * Get the next token. - */ - -YAML_DECLARE(int) -yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token) -{ - assert(parser); /* Non-NULL parser object is expected. */ - assert(token); /* Non-NULL token object is expected. */ - - /* Erase the token object. */ - - memset(token, 0, sizeof(yaml_token_t)); - - /* No tokens after STREAM-END or error. */ - - if (parser->stream_end_produced || parser->error) { - return 1; - } - - /* Ensure that the tokens queue contains enough tokens. */ - - if (!parser->token_available) { - if (!yaml_parser_fetch_more_tokens(parser)) - return 0; - } - - /* Fetch the next token from the queue. */ - - *token = DEQUEUE(parser, parser->tokens); - parser->token_available = 0; - parser->tokens_parsed ++; - - if (token->type == YAML_STREAM_END_TOKEN) { - parser->stream_end_produced = 1; - } - - return 1; -} - -/* - * Set the scanner error and return 0. - */ - -static int -yaml_parser_set_scanner_error(yaml_parser_t *parser, const char *context, - yaml_mark_t context_mark, const char *problem) -{ - parser->error = YAML_SCANNER_ERROR; - parser->context = context; - parser->context_mark = context_mark; - parser->problem = problem; - parser->problem_mark = parser->mark; - - return 0; -} - -/* - * Ensure that the tokens queue contains at least one token which can be - * returned to the Parser. - */ - -YAML_DECLARE(int) -yaml_parser_fetch_more_tokens(yaml_parser_t *parser) -{ - int need_more_tokens; - - /* While we need more tokens to fetch, do it. */ - - while (1) - { - /* - * Check if we really need to fetch more tokens. - */ - - need_more_tokens = 0; - - if (parser->tokens.head == parser->tokens.tail) - { - /* Queue is empty. */ - - need_more_tokens = 1; - } - else - { - yaml_simple_key_t *simple_key; - - /* Check if any potential simple key may occupy the head position. */ - - if (!yaml_parser_stale_simple_keys(parser)) - return 0; - - for (simple_key = parser->simple_keys.start; - simple_key != parser->simple_keys.top; simple_key++) { - if (simple_key->possible - && simple_key->token_number == parser->tokens_parsed) { - need_more_tokens = 1; - break; - } - } - } - - /* We are finished. */ - - if (!need_more_tokens) - break; - - /* Fetch the next token. */ - - if (!yaml_parser_fetch_next_token(parser)) - return 0; - } - - parser->token_available = 1; - - return 1; -} - -/* - * The dispatcher for token fetchers. - */ - -static int -yaml_parser_fetch_next_token(yaml_parser_t *parser) -{ - /* Ensure that the buffer is initialized. */ - - if (!CACHE(parser, 1)) - return 0; - - /* Check if we just started scanning. Fetch STREAM-START then. */ - - if (!parser->stream_start_produced) - return yaml_parser_fetch_stream_start(parser); - - /* Eat whitespaces and comments until we reach the next token. */ - - if (!yaml_parser_scan_to_next_token(parser)) - return 0; - - /* Remove obsolete potential simple keys. */ - - if (!yaml_parser_stale_simple_keys(parser)) - return 0; - - /* Check the indentation level against the current column. */ - - if (!yaml_parser_unroll_indent(parser, parser->mark.column)) - return 0; - - /* - * Ensure that the buffer contains at least 4 characters. 4 is the length - * of the longest indicators ('--- ' and '... '). - */ - - if (!CACHE(parser, 4)) - return 0; - - /* Is it the end of the stream? */ - - if (IS_Z(parser->buffer)) - return yaml_parser_fetch_stream_end(parser); - - /* Is it a directive? */ - - if (parser->mark.column == 0 && CHECK(parser->buffer, '%')) - return yaml_parser_fetch_directive(parser); - - /* Is it the document start indicator? */ - - if (parser->mark.column == 0 - && CHECK_AT(parser->buffer, '-', 0) - && CHECK_AT(parser->buffer, '-', 1) - && CHECK_AT(parser->buffer, '-', 2) - && IS_BLANKZ_AT(parser->buffer, 3)) - return yaml_parser_fetch_document_indicator(parser, - YAML_DOCUMENT_START_TOKEN); - - /* Is it the document end indicator? */ - - if (parser->mark.column == 0 - && CHECK_AT(parser->buffer, '.', 0) - && CHECK_AT(parser->buffer, '.', 1) - && CHECK_AT(parser->buffer, '.', 2) - && IS_BLANKZ_AT(parser->buffer, 3)) - return yaml_parser_fetch_document_indicator(parser, - YAML_DOCUMENT_END_TOKEN); - - /* Is it the flow sequence start indicator? */ - - if (CHECK(parser->buffer, '[')) - return yaml_parser_fetch_flow_collection_start(parser, - YAML_FLOW_SEQUENCE_START_TOKEN); - - /* Is it the flow mapping start indicator? */ - - if (CHECK(parser->buffer, '{')) - return yaml_parser_fetch_flow_collection_start(parser, - YAML_FLOW_MAPPING_START_TOKEN); - - /* Is it the flow sequence end indicator? */ - - if (CHECK(parser->buffer, ']')) - return yaml_parser_fetch_flow_collection_end(parser, - YAML_FLOW_SEQUENCE_END_TOKEN); - - /* Is it the flow mapping end indicator? */ - - if (CHECK(parser->buffer, '}')) - return yaml_parser_fetch_flow_collection_end(parser, - YAML_FLOW_MAPPING_END_TOKEN); - - /* Is it the flow entry indicator? */ - - if (CHECK(parser->buffer, ',')) - return yaml_parser_fetch_flow_entry(parser); - - /* Is it the block entry indicator? */ - - if (CHECK(parser->buffer, '-') && IS_BLANKZ_AT(parser->buffer, 1)) - return yaml_parser_fetch_block_entry(parser); - - /* Is it the key indicator? */ - - if (CHECK(parser->buffer, '?') - && (parser->flow_level || IS_BLANKZ_AT(parser->buffer, 1))) - return yaml_parser_fetch_key(parser); - - /* Is it the value indicator? */ - - if (CHECK(parser->buffer, ':') - && (parser->flow_level || IS_BLANKZ_AT(parser->buffer, 1))) - return yaml_parser_fetch_value(parser); - - /* Is it an alias? */ - - if (CHECK(parser->buffer, '*')) - return yaml_parser_fetch_anchor(parser, YAML_ALIAS_TOKEN); - - /* Is it an anchor? */ - - if (CHECK(parser->buffer, '&')) - return yaml_parser_fetch_anchor(parser, YAML_ANCHOR_TOKEN); - - /* Is it a tag? */ - - if (CHECK(parser->buffer, '!')) - return yaml_parser_fetch_tag(parser); - - /* Is it a literal scalar? */ - - if (CHECK(parser->buffer, '|') && !parser->flow_level) - return yaml_parser_fetch_block_scalar(parser, 1); - - /* Is it a folded scalar? */ - - if (CHECK(parser->buffer, '>') && !parser->flow_level) - return yaml_parser_fetch_block_scalar(parser, 0); - - /* Is it a single-quoted scalar? */ - - if (CHECK(parser->buffer, '\'')) - return yaml_parser_fetch_flow_scalar(parser, 1); - - /* Is it a double-quoted scalar? */ - - if (CHECK(parser->buffer, '"')) - return yaml_parser_fetch_flow_scalar(parser, 0); - - /* - * Is it a plain scalar? - * - * A plain scalar may start with any non-blank characters except - * - * '-', '?', ':', ',', '[', ']', '{', '}', - * '#', '&', '*', '!', '|', '>', '\'', '\"', - * '%', '@', '`'. - * - * In the block context (and, for the '-' indicator, in the flow context - * too), it may also start with the characters - * - * '-', '?', ':' - * - * if it is followed by a non-space character. - * - * The last rule is more restrictive than the specification requires. - */ - - if (!(IS_BLANKZ(parser->buffer) || CHECK(parser->buffer, '-') - || CHECK(parser->buffer, '?') || CHECK(parser->buffer, ':') - || CHECK(parser->buffer, ',') || CHECK(parser->buffer, '[') - || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '{') - || CHECK(parser->buffer, '}') || CHECK(parser->buffer, '#') - || CHECK(parser->buffer, '&') || CHECK(parser->buffer, '*') - || CHECK(parser->buffer, '!') || CHECK(parser->buffer, '|') - || CHECK(parser->buffer, '>') || CHECK(parser->buffer, '\'') - || CHECK(parser->buffer, '"') || CHECK(parser->buffer, '%') - || CHECK(parser->buffer, '@') || CHECK(parser->buffer, '`')) || - (CHECK(parser->buffer, '-') && !IS_BLANK_AT(parser->buffer, 1)) || - (!parser->flow_level && - (CHECK(parser->buffer, '?') || CHECK(parser->buffer, ':')) - && !IS_BLANKZ_AT(parser->buffer, 1))) - return yaml_parser_fetch_plain_scalar(parser); - - /* - * If we don't determine the token type so far, it is an error. - */ - - return yaml_parser_set_scanner_error(parser, - "while scanning for the next token", parser->mark, - "found character that cannot start any token"); -} - -/* - * Check the list of potential simple keys and remove the positions that - * cannot contain simple keys anymore. - */ - -static int -yaml_parser_stale_simple_keys(yaml_parser_t *parser) -{ - yaml_simple_key_t *simple_key; - - /* Check for a potential simple key for each flow level. */ - - for (simple_key = parser->simple_keys.start; - simple_key != parser->simple_keys.top; simple_key ++) - { - /* - * The specification requires that a simple key - * - * - is limited to a single line, - * - is shorter than 1024 characters. - */ - - if (simple_key->possible - && (simple_key->mark.line < parser->mark.line - || simple_key->mark.index+1024 < parser->mark.index)) { - - /* Check if the potential simple key to be removed is required. */ - - if (simple_key->required) { - return yaml_parser_set_scanner_error(parser, - "while scanning a simple key", simple_key->mark, - "could not find expected ':'"); - } - - simple_key->possible = 0; - } - } - - return 1; -} - -/* - * Check if a simple key may start at the current position and add it if - * needed. - */ - -static int -yaml_parser_save_simple_key(yaml_parser_t *parser) -{ - /* - * A simple key is required at the current position if the scanner is in - * the block context and the current column coincides with the indentation - * level. - */ - - int required = (!parser->flow_level - && parser->indent == (int)parser->mark.column); - - /* - * A simple key is required only when it is the first token in the current - * line. Therefore it is always allowed. But we add a check anyway. - */ - - assert(parser->simple_key_allowed || !required); /* Impossible. */ - - /* - * If the current position may start a simple key, save it. - */ - - if (parser->simple_key_allowed) - { - yaml_simple_key_t simple_key = { 1, required, - parser->tokens_parsed + parser->tokens.tail - parser->tokens.head, - { 0, 0, 0 } }; - simple_key.mark = parser->mark; - - if (!yaml_parser_remove_simple_key(parser)) return 0; - - *(parser->simple_keys.top-1) = simple_key; - } - - return 1; -} - -/* - * Remove a potential simple key at the current flow level. - */ - -static int -yaml_parser_remove_simple_key(yaml_parser_t *parser) -{ - yaml_simple_key_t *simple_key = parser->simple_keys.top-1; - - if (simple_key->possible) - { - /* If the key is required, it is an error. */ - - if (simple_key->required) { - return yaml_parser_set_scanner_error(parser, - "while scanning a simple key", simple_key->mark, - "could not find expected ':'"); - } - } - - /* Remove the key from the stack. */ - - simple_key->possible = 0; - - return 1; -} - -/* - * Increase the flow level and resize the simple key list if needed. - */ - -static int -yaml_parser_increase_flow_level(yaml_parser_t *parser) -{ - yaml_simple_key_t empty_simple_key = { 0, 0, 0, { 0, 0, 0 } }; - - /* Reset the simple key on the next level. */ - - if (!PUSH(parser, parser->simple_keys, empty_simple_key)) - return 0; - - /* Increase the flow level. */ - - parser->flow_level++; - - return 1; -} - -/* - * Decrease the flow level. - */ - -static int -yaml_parser_decrease_flow_level(yaml_parser_t *parser) -{ - yaml_simple_key_t dummy_key; /* Used to eliminate a compiler warning. */ - - if (parser->flow_level) { - parser->flow_level --; - dummy_key = POP(parser, parser->simple_keys); - } - - return 1; -} - -/* - * Push the current indentation level to the stack and set the new level - * the current column is greater than the indentation level. In this case, - * append or insert the specified token into the token queue. - * - */ - -static int -yaml_parser_roll_indent(yaml_parser_t *parser, int column, - int number, yaml_token_type_t type, yaml_mark_t mark) -{ - yaml_token_t token; - - /* In the flow context, do nothing. */ - - if (parser->flow_level) - return 1; - - if (parser->indent < column) - { - /* - * Push the current indentation level to the stack and set the new - * indentation level. - */ - - if (!PUSH(parser, parser->indents, parser->indent)) - return 0; - - parser->indent = column; - - /* Create a token and insert it into the queue. */ - - TOKEN_INIT(token, type, mark, mark); - - if (number == -1) { - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - } - else { - if (!QUEUE_INSERT(parser, - parser->tokens, number - parser->tokens_parsed, token)) - return 0; - } - } - - return 1; -} - -/* - * Pop indentation levels from the indents stack until the current level - * becomes less or equal to the column. For each intendation level, append - * the BLOCK-END token. - */ - - -static int -yaml_parser_unroll_indent(yaml_parser_t *parser, int column) -{ - yaml_token_t token; - - /* In the flow context, do nothing. */ - - if (parser->flow_level) - return 1; - - /* Loop through the intendation levels in the stack. */ - - while (parser->indent > column) - { - /* Create a token and append it to the queue. */ - - TOKEN_INIT(token, YAML_BLOCK_END_TOKEN, parser->mark, parser->mark); - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - /* Pop the indentation level. */ - - parser->indent = POP(parser, parser->indents); - } - - return 1; -} - -/* - * Initialize the scanner and produce the STREAM-START token. - */ - -static int -yaml_parser_fetch_stream_start(yaml_parser_t *parser) -{ - yaml_simple_key_t simple_key = { 0, 0, 0, { 0, 0, 0 } }; - yaml_token_t token; - - /* Set the initial indentation. */ - - parser->indent = -1; - - /* Initialize the simple key stack. */ - - if (!PUSH(parser, parser->simple_keys, simple_key)) - return 0; - - /* A simple key is allowed at the beginning of the stream. */ - - parser->simple_key_allowed = 1; - - /* We have started. */ - - parser->stream_start_produced = 1; - - /* Create the STREAM-START token and append it to the queue. */ - - STREAM_START_TOKEN_INIT(token, parser->encoding, - parser->mark, parser->mark); - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce the STREAM-END token and shut down the scanner. - */ - -static int -yaml_parser_fetch_stream_end(yaml_parser_t *parser) -{ - yaml_token_t token; - - /* Force new line. */ - - if (parser->mark.column != 0) { - parser->mark.column = 0; - parser->mark.line ++; - } - - /* Reset the indentation level. */ - - if (!yaml_parser_unroll_indent(parser, -1)) - return 0; - - /* Reset simple keys. */ - - if (!yaml_parser_remove_simple_key(parser)) - return 0; - - parser->simple_key_allowed = 0; - - /* Create the STREAM-END token and append it to the queue. */ - - STREAM_END_TOKEN_INIT(token, parser->mark, parser->mark); - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce a VERSION-DIRECTIVE or TAG-DIRECTIVE token. - */ - -static int -yaml_parser_fetch_directive(yaml_parser_t *parser) -{ - yaml_token_t token; - - /* Reset the indentation level. */ - - if (!yaml_parser_unroll_indent(parser, -1)) - return 0; - - /* Reset simple keys. */ - - if (!yaml_parser_remove_simple_key(parser)) - return 0; - - parser->simple_key_allowed = 0; - - /* Create the YAML-DIRECTIVE or TAG-DIRECTIVE token. */ - - if (!yaml_parser_scan_directive(parser, &token)) - return 0; - - /* Append the token to the queue. */ - - if (!ENQUEUE(parser, parser->tokens, token)) { - yaml_token_delete(&token); - return 0; - } - - return 1; -} - -/* - * Produce the DOCUMENT-START or DOCUMENT-END token. - */ - -static int -yaml_parser_fetch_document_indicator(yaml_parser_t *parser, - yaml_token_type_t type) -{ - yaml_mark_t start_mark, end_mark; - yaml_token_t token; - - /* Reset the indentation level. */ - - if (!yaml_parser_unroll_indent(parser, -1)) - return 0; - - /* Reset simple keys. */ - - if (!yaml_parser_remove_simple_key(parser)) - return 0; - - parser->simple_key_allowed = 0; - - /* Consume the token. */ - - start_mark = parser->mark; - - SKIP(parser); - SKIP(parser); - SKIP(parser); - - end_mark = parser->mark; - - /* Create the DOCUMENT-START or DOCUMENT-END token. */ - - TOKEN_INIT(token, type, start_mark, end_mark); - - /* Append the token to the queue. */ - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce the FLOW-SEQUENCE-START or FLOW-MAPPING-START token. - */ - -static int -yaml_parser_fetch_flow_collection_start(yaml_parser_t *parser, - yaml_token_type_t type) -{ - yaml_mark_t start_mark, end_mark; - yaml_token_t token; - - /* The indicators '[' and '{' may start a simple key. */ - - if (!yaml_parser_save_simple_key(parser)) - return 0; - - /* Increase the flow level. */ - - if (!yaml_parser_increase_flow_level(parser)) - return 0; - - /* A simple key may follow the indicators '[' and '{'. */ - - parser->simple_key_allowed = 1; - - /* Consume the token. */ - - start_mark = parser->mark; - SKIP(parser); - end_mark = parser->mark; - - /* Create the FLOW-SEQUENCE-START of FLOW-MAPPING-START token. */ - - TOKEN_INIT(token, type, start_mark, end_mark); - - /* Append the token to the queue. */ - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce the FLOW-SEQUENCE-END or FLOW-MAPPING-END token. - */ - -static int -yaml_parser_fetch_flow_collection_end(yaml_parser_t *parser, - yaml_token_type_t type) -{ - yaml_mark_t start_mark, end_mark; - yaml_token_t token; - - /* Reset any potential simple key on the current flow level. */ - - if (!yaml_parser_remove_simple_key(parser)) - return 0; - - /* Decrease the flow level. */ - - if (!yaml_parser_decrease_flow_level(parser)) - return 0; - - /* No simple keys after the indicators ']' and '}'. */ - - parser->simple_key_allowed = 0; - - /* Consume the token. */ - - start_mark = parser->mark; - SKIP(parser); - end_mark = parser->mark; - - /* Create the FLOW-SEQUENCE-END of FLOW-MAPPING-END token. */ - - TOKEN_INIT(token, type, start_mark, end_mark); - - /* Append the token to the queue. */ - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce the FLOW-ENTRY token. - */ - -static int -yaml_parser_fetch_flow_entry(yaml_parser_t *parser) -{ - yaml_mark_t start_mark, end_mark; - yaml_token_t token; - - /* Reset any potential simple keys on the current flow level. */ - - if (!yaml_parser_remove_simple_key(parser)) - return 0; - - /* Simple keys are allowed after ','. */ - - parser->simple_key_allowed = 1; - - /* Consume the token. */ - - start_mark = parser->mark; - SKIP(parser); - end_mark = parser->mark; - - /* Create the FLOW-ENTRY token and append it to the queue. */ - - TOKEN_INIT(token, YAML_FLOW_ENTRY_TOKEN, start_mark, end_mark); - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce the BLOCK-ENTRY token. - */ - -static int -yaml_parser_fetch_block_entry(yaml_parser_t *parser) -{ - yaml_mark_t start_mark, end_mark; - yaml_token_t token; - - /* Check if the scanner is in the block context. */ - - if (!parser->flow_level) - { - /* Check if we are allowed to start a new entry. */ - - if (!parser->simple_key_allowed) { - return yaml_parser_set_scanner_error(parser, NULL, parser->mark, - "block sequence entries are not allowed in this context"); - } - - /* Add the BLOCK-SEQUENCE-START token if needed. */ - - if (!yaml_parser_roll_indent(parser, parser->mark.column, -1, - YAML_BLOCK_SEQUENCE_START_TOKEN, parser->mark)) - return 0; - } - else - { - /* - * It is an error for the '-' indicator to occur in the flow context, - * but we let the Parser detect and report about it because the Parser - * is able to point to the context. - */ - } - - /* Reset any potential simple keys on the current flow level. */ - - if (!yaml_parser_remove_simple_key(parser)) - return 0; - - /* Simple keys are allowed after '-'. */ - - parser->simple_key_allowed = 1; - - /* Consume the token. */ - - start_mark = parser->mark; - SKIP(parser); - end_mark = parser->mark; - - /* Create the BLOCK-ENTRY token and append it to the queue. */ - - TOKEN_INIT(token, YAML_BLOCK_ENTRY_TOKEN, start_mark, end_mark); - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce the KEY token. - */ - -static int -yaml_parser_fetch_key(yaml_parser_t *parser) -{ - yaml_mark_t start_mark, end_mark; - yaml_token_t token; - - /* In the block context, additional checks are required. */ - - if (!parser->flow_level) - { - /* Check if we are allowed to start a new key (not nessesary simple). */ - - if (!parser->simple_key_allowed) { - return yaml_parser_set_scanner_error(parser, NULL, parser->mark, - "mapping keys are not allowed in this context"); - } - - /* Add the BLOCK-MAPPING-START token if needed. */ - - if (!yaml_parser_roll_indent(parser, parser->mark.column, -1, - YAML_BLOCK_MAPPING_START_TOKEN, parser->mark)) - return 0; - } - - /* Reset any potential simple keys on the current flow level. */ - - if (!yaml_parser_remove_simple_key(parser)) - return 0; - - /* Simple keys are allowed after '?' in the block context. */ - - parser->simple_key_allowed = (!parser->flow_level); - - /* Consume the token. */ - - start_mark = parser->mark; - SKIP(parser); - end_mark = parser->mark; - - /* Create the KEY token and append it to the queue. */ - - TOKEN_INIT(token, YAML_KEY_TOKEN, start_mark, end_mark); - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce the VALUE token. - */ - -static int -yaml_parser_fetch_value(yaml_parser_t *parser) -{ - yaml_mark_t start_mark, end_mark; - yaml_token_t token; - yaml_simple_key_t *simple_key = parser->simple_keys.top-1; - - /* Have we found a simple key? */ - - if (simple_key->possible) - { - - /* Create the KEY token and insert it into the queue. */ - - TOKEN_INIT(token, YAML_KEY_TOKEN, simple_key->mark, simple_key->mark); - - if (!QUEUE_INSERT(parser, parser->tokens, - simple_key->token_number - parser->tokens_parsed, token)) - return 0; - - /* In the block context, we may need to add the BLOCK-MAPPING-START token. */ - - if (!yaml_parser_roll_indent(parser, simple_key->mark.column, - simple_key->token_number, - YAML_BLOCK_MAPPING_START_TOKEN, simple_key->mark)) - return 0; - - /* Remove the simple key. */ - - simple_key->possible = 0; - - /* A simple key cannot follow another simple key. */ - - parser->simple_key_allowed = 0; - } - else - { - /* The ':' indicator follows a complex key. */ - - /* In the block context, extra checks are required. */ - - if (!parser->flow_level) - { - /* Check if we are allowed to start a complex value. */ - - if (!parser->simple_key_allowed) { - return yaml_parser_set_scanner_error(parser, NULL, parser->mark, - "mapping values are not allowed in this context"); - } - - /* Add the BLOCK-MAPPING-START token if needed. */ - - if (!yaml_parser_roll_indent(parser, parser->mark.column, -1, - YAML_BLOCK_MAPPING_START_TOKEN, parser->mark)) - return 0; - } - - /* Simple keys after ':' are allowed in the block context. */ - - parser->simple_key_allowed = (!parser->flow_level); - } - - /* Consume the token. */ - - start_mark = parser->mark; - SKIP(parser); - end_mark = parser->mark; - - /* Create the VALUE token and append it to the queue. */ - - TOKEN_INIT(token, YAML_VALUE_TOKEN, start_mark, end_mark); - - if (!ENQUEUE(parser, parser->tokens, token)) - return 0; - - return 1; -} - -/* - * Produce the ALIAS or ANCHOR token. - */ - -static int -yaml_parser_fetch_anchor(yaml_parser_t *parser, yaml_token_type_t type) -{ - yaml_token_t token; - - /* An anchor or an alias could be a simple key. */ - - if (!yaml_parser_save_simple_key(parser)) - return 0; - - /* A simple key cannot follow an anchor or an alias. */ - - parser->simple_key_allowed = 0; - - /* Create the ALIAS or ANCHOR token and append it to the queue. */ - - if (!yaml_parser_scan_anchor(parser, &token, type)) - return 0; - - if (!ENQUEUE(parser, parser->tokens, token)) { - yaml_token_delete(&token); - return 0; - } - return 1; -} - -/* - * Produce the TAG token. - */ - -static int -yaml_parser_fetch_tag(yaml_parser_t *parser) -{ - yaml_token_t token; - - /* A tag could be a simple key. */ - - if (!yaml_parser_save_simple_key(parser)) - return 0; - - /* A simple key cannot follow a tag. */ - - parser->simple_key_allowed = 0; - - /* Create the TAG token and append it to the queue. */ - - if (!yaml_parser_scan_tag(parser, &token)) - return 0; - - if (!ENQUEUE(parser, parser->tokens, token)) { - yaml_token_delete(&token); - return 0; - } - - return 1; -} - -/* - * Produce the SCALAR(...,literal) or SCALAR(...,folded) tokens. - */ - -static int -yaml_parser_fetch_block_scalar(yaml_parser_t *parser, int literal) -{ - yaml_token_t token; - - /* Remove any potential simple keys. */ - - if (!yaml_parser_remove_simple_key(parser)) - return 0; - - /* A simple key may follow a block scalar. */ - - parser->simple_key_allowed = 1; - - /* Create the SCALAR token and append it to the queue. */ - - if (!yaml_parser_scan_block_scalar(parser, &token, literal)) - return 0; - - if (!ENQUEUE(parser, parser->tokens, token)) { - yaml_token_delete(&token); - return 0; - } - - return 1; -} - -/* - * Produce the SCALAR(...,single-quoted) or SCALAR(...,double-quoted) tokens. - */ - -static int -yaml_parser_fetch_flow_scalar(yaml_parser_t *parser, int single) -{ - yaml_token_t token; - - /* A plain scalar could be a simple key. */ - - if (!yaml_parser_save_simple_key(parser)) - return 0; - - /* A simple key cannot follow a flow scalar. */ - - parser->simple_key_allowed = 0; - - /* Create the SCALAR token and append it to the queue. */ - - if (!yaml_parser_scan_flow_scalar(parser, &token, single)) - return 0; - - if (!ENQUEUE(parser, parser->tokens, token)) { - yaml_token_delete(&token); - return 0; - } - - return 1; -} - -/* - * Produce the SCALAR(...,plain) token. - */ - -static int -yaml_parser_fetch_plain_scalar(yaml_parser_t *parser) -{ - yaml_token_t token; - - /* A plain scalar could be a simple key. */ - - if (!yaml_parser_save_simple_key(parser)) - return 0; - - /* A simple key cannot follow a flow scalar. */ - - parser->simple_key_allowed = 0; - - /* Create the SCALAR token and append it to the queue. */ - - if (!yaml_parser_scan_plain_scalar(parser, &token)) - return 0; - - if (!ENQUEUE(parser, parser->tokens, token)) { - yaml_token_delete(&token); - return 0; - } - - return 1; -} - -/* - * Eat whitespaces and comments until the next token is found. - */ - -static int -yaml_parser_scan_to_next_token(yaml_parser_t *parser) -{ - /* Until the next token is not found. */ - - while (1) - { - /* Allow the BOM mark to start a line. */ - - if (!CACHE(parser, 1)) return 0; - - if (parser->mark.column == 0 && IS_BOM(parser->buffer)) - SKIP(parser); - - /* - * Eat whitespaces. - * - * Tabs are allowed: - * - * - in the flow context; - * - in the block context, but not at the beginning of the line or - * after '-', '?', or ':' (complex value). - */ - - if (!CACHE(parser, 1)) return 0; - - while (CHECK(parser->buffer,' ') || - ((parser->flow_level || !parser->simple_key_allowed) && - CHECK(parser->buffer, '\t'))) { - SKIP(parser); - if (!CACHE(parser, 1)) return 0; - } - - /* Eat a comment until a line break. */ - - if (CHECK(parser->buffer, '#')) { - while (!IS_BREAKZ(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) return 0; - } - } - - /* If it is a line break, eat it. */ - - if (IS_BREAK(parser->buffer)) - { - if (!CACHE(parser, 2)) return 0; - SKIP_LINE(parser); - - /* In the block context, a new line may start a simple key. */ - - if (!parser->flow_level) { - parser->simple_key_allowed = 1; - } - } - else - { - /* We have found a token. */ - - break; - } - } - - return 1; -} - -/* - * Scan a YAML-DIRECTIVE or TAG-DIRECTIVE token. - * - * Scope: - * %YAML 1.1 # a comment \n - * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - * %TAG !yaml! tag:yaml.org,2002: \n - * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - */ - -int -yaml_parser_scan_directive(yaml_parser_t *parser, yaml_token_t *token) -{ - yaml_mark_t start_mark, end_mark; - yaml_char_t *name = NULL; - int major, minor; - yaml_char_t *handle = NULL, *prefix = NULL; - - /* Eat '%'. */ - - start_mark = parser->mark; - - SKIP(parser); - - /* Scan the directive name. */ - - if (!yaml_parser_scan_directive_name(parser, start_mark, &name)) - goto error; - - /* Is it a YAML directive? */ - - if (strcmp((char *)name, "YAML") == 0) - { - /* Scan the VERSION directive value. */ - - if (!yaml_parser_scan_version_directive_value(parser, start_mark, - &major, &minor)) - goto error; - - end_mark = parser->mark; - - /* Create a VERSION-DIRECTIVE token. */ - - VERSION_DIRECTIVE_TOKEN_INIT(*token, major, minor, - start_mark, end_mark); - } - - /* Is it a TAG directive? */ - - else if (strcmp((char *)name, "TAG") == 0) - { - /* Scan the TAG directive value. */ - - if (!yaml_parser_scan_tag_directive_value(parser, start_mark, - &handle, &prefix)) - goto error; - - end_mark = parser->mark; - - /* Create a TAG-DIRECTIVE token. */ - - TAG_DIRECTIVE_TOKEN_INIT(*token, handle, prefix, - start_mark, end_mark); - } - - /* Unknown directive. */ - - else - { - yaml_parser_set_scanner_error(parser, "while scanning a directive", - start_mark, "found uknown directive name"); - goto error; - } - - /* Eat the rest of the line including any comments. */ - - if (!CACHE(parser, 1)) goto error; - - while (IS_BLANK(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) goto error; - } - - if (CHECK(parser->buffer, '#')) { - while (!IS_BREAKZ(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) goto error; - } - } - - /* Check if we are at the end of the line. */ - - if (!IS_BREAKZ(parser->buffer)) { - yaml_parser_set_scanner_error(parser, "while scanning a directive", - start_mark, "did not find expected comment or line break"); - goto error; - } - - /* Eat a line break. */ - - if (IS_BREAK(parser->buffer)) { - if (!CACHE(parser, 2)) goto error; - SKIP_LINE(parser); - } - - yaml_free(name); - - return 1; - -error: - yaml_free(prefix); - yaml_free(handle); - yaml_free(name); - return 0; -} - -/* - * Scan the directive name. - * - * Scope: - * %YAML 1.1 # a comment \n - * ^^^^ - * %TAG !yaml! tag:yaml.org,2002: \n - * ^^^ - */ - -static int -yaml_parser_scan_directive_name(yaml_parser_t *parser, - yaml_mark_t start_mark, yaml_char_t **name) -{ - yaml_string_t string = NULL_STRING; - - if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; - - /* Consume the directive name. */ - - if (!CACHE(parser, 1)) goto error; - - while (IS_ALPHA(parser->buffer)) - { - if (!READ(parser, string)) goto error; - if (!CACHE(parser, 1)) goto error; - } - - /* Check if the name is empty. */ - - if (string.start == string.pointer) { - yaml_parser_set_scanner_error(parser, "while scanning a directive", - start_mark, "could not find expected directive name"); - goto error; - } - - /* Check for an blank character after the name. */ - - if (!IS_BLANKZ(parser->buffer)) { - yaml_parser_set_scanner_error(parser, "while scanning a directive", - start_mark, "found unexpected non-alphabetical character"); - goto error; - } - - *name = string.start; - - return 1; - -error: - STRING_DEL(parser, string); - return 0; -} - -/* - * Scan the value of VERSION-DIRECTIVE. - * - * Scope: - * %YAML 1.1 # a comment \n - * ^^^^^^ - */ - -static int -yaml_parser_scan_version_directive_value(yaml_parser_t *parser, - yaml_mark_t start_mark, int *major, int *minor) -{ - /* Eat whitespaces. */ - - if (!CACHE(parser, 1)) return 0; - - while (IS_BLANK(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) return 0; - } - - /* Consume the major version number. */ - - if (!yaml_parser_scan_version_directive_number(parser, start_mark, major)) - return 0; - - /* Eat '.'. */ - - if (!CHECK(parser->buffer, '.')) { - return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive", - start_mark, "did not find expected digit or '.' character"); - } - - SKIP(parser); - - /* Consume the minor version number. */ - - if (!yaml_parser_scan_version_directive_number(parser, start_mark, minor)) - return 0; - - return 1; -} - -#define MAX_NUMBER_LENGTH 9 - -/* - * Scan the version number of VERSION-DIRECTIVE. - * - * Scope: - * %YAML 1.1 # a comment \n - * ^ - * %YAML 1.1 # a comment \n - * ^ - */ - -static int -yaml_parser_scan_version_directive_number(yaml_parser_t *parser, - yaml_mark_t start_mark, int *number) -{ - int value = 0; - size_t length = 0; - - /* Repeat while the next character is digit. */ - - if (!CACHE(parser, 1)) return 0; - - while (IS_DIGIT(parser->buffer)) - { - /* Check if the number is too long. */ - - if (++length > MAX_NUMBER_LENGTH) { - return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive", - start_mark, "found extremely long version number"); - } - - value = value*10 + AS_DIGIT(parser->buffer); - - SKIP(parser); - - if (!CACHE(parser, 1)) return 0; - } - - /* Check if the number was present. */ - - if (!length) { - return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive", - start_mark, "did not find expected version number"); - } - - *number = value; - - return 1; -} - -/* - * Scan the value of a TAG-DIRECTIVE token. - * - * Scope: - * %TAG !yaml! tag:yaml.org,2002: \n - * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - */ - -static int -yaml_parser_scan_tag_directive_value(yaml_parser_t *parser, - yaml_mark_t start_mark, yaml_char_t **handle, yaml_char_t **prefix) -{ - yaml_char_t *handle_value = NULL; - yaml_char_t *prefix_value = NULL; - - /* Eat whitespaces. */ - - if (!CACHE(parser, 1)) goto error; - - while (IS_BLANK(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) goto error; - } - - /* Scan a handle. */ - - if (!yaml_parser_scan_tag_handle(parser, 1, start_mark, &handle_value)) - goto error; - - /* Expect a whitespace. */ - - if (!CACHE(parser, 1)) goto error; - - if (!IS_BLANK(parser->buffer)) { - yaml_parser_set_scanner_error(parser, "while scanning a %TAG directive", - start_mark, "did not find expected whitespace"); - goto error; - } - - /* Eat whitespaces. */ - - while (IS_BLANK(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) goto error; - } - - /* Scan a prefix. */ - - if (!yaml_parser_scan_tag_uri(parser, 1, NULL, start_mark, &prefix_value)) - goto error; - - /* Expect a whitespace or line break. */ - - if (!CACHE(parser, 1)) goto error; - - if (!IS_BLANKZ(parser->buffer)) { - yaml_parser_set_scanner_error(parser, "while scanning a %TAG directive", - start_mark, "did not find expected whitespace or line break"); - goto error; - } - - *handle = handle_value; - *prefix = prefix_value; - - return 1; - -error: - yaml_free(handle_value); - yaml_free(prefix_value); - return 0; -} - -static int -yaml_parser_scan_anchor(yaml_parser_t *parser, yaml_token_t *token, - yaml_token_type_t type) -{ - int length = 0; - yaml_mark_t start_mark, end_mark; - yaml_string_t string = NULL_STRING; - - if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; - - /* Eat the indicator character. */ - - start_mark = parser->mark; - - SKIP(parser); - - /* Consume the value. */ - - if (!CACHE(parser, 1)) goto error; - - while (IS_ALPHA(parser->buffer)) { - if (!READ(parser, string)) goto error; - if (!CACHE(parser, 1)) goto error; - length ++; - } - - end_mark = parser->mark; - - /* - * Check if length of the anchor is greater than 0 and it is followed by - * a whitespace character or one of the indicators: - * - * '?', ':', ',', ']', '}', '%', '@', '`'. - */ - - if (!length || !(IS_BLANKZ(parser->buffer) || CHECK(parser->buffer, '?') - || CHECK(parser->buffer, ':') || CHECK(parser->buffer, ',') - || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '}') - || CHECK(parser->buffer, '%') || CHECK(parser->buffer, '@') - || CHECK(parser->buffer, '`'))) { - yaml_parser_set_scanner_error(parser, type == YAML_ANCHOR_TOKEN ? - "while scanning an anchor" : "while scanning an alias", start_mark, - "did not find expected alphabetic or numeric character"); - goto error; - } - - /* Create a token. */ - - if (type == YAML_ANCHOR_TOKEN) { - ANCHOR_TOKEN_INIT(*token, string.start, start_mark, end_mark); - } - else { - ALIAS_TOKEN_INIT(*token, string.start, start_mark, end_mark); - } - - return 1; - -error: - STRING_DEL(parser, string); - return 0; -} - -/* - * Scan a TAG token. - */ - -static int -yaml_parser_scan_tag(yaml_parser_t *parser, yaml_token_t *token) -{ - yaml_char_t *handle = NULL; - yaml_char_t *suffix = NULL; - yaml_mark_t start_mark, end_mark; - - start_mark = parser->mark; - - /* Check if the tag is in the canonical form. */ - - if (!CACHE(parser, 2)) goto error; - - if (CHECK_AT(parser->buffer, '<', 1)) - { - /* Set the handle to '' */ - - handle = yaml_malloc(1); - if (!handle) goto error; - handle[0] = '\0'; - - /* Eat '!<' */ - - SKIP(parser); - SKIP(parser); - - /* Consume the tag value. */ - - if (!yaml_parser_scan_tag_uri(parser, 0, NULL, start_mark, &suffix)) - goto error; - - /* Check for '>' and eat it. */ - - if (!CHECK(parser->buffer, '>')) { - yaml_parser_set_scanner_error(parser, "while scanning a tag", - start_mark, "did not find the expected '>'"); - goto error; - } - - SKIP(parser); - } - else - { - /* The tag has either the '!suffix' or the '!handle!suffix' form. */ - - /* First, try to scan a handle. */ - - if (!yaml_parser_scan_tag_handle(parser, 0, start_mark, &handle)) - goto error; - - /* Check if it is, indeed, handle. */ - - if (handle[0] == '!' && handle[1] != '\0' && handle[strlen((char *)handle)-1] == '!') - { - /* Scan the suffix now. */ - - if (!yaml_parser_scan_tag_uri(parser, 0, NULL, start_mark, &suffix)) - goto error; - } - else - { - /* It wasn't a handle after all. Scan the rest of the tag. */ - - if (!yaml_parser_scan_tag_uri(parser, 0, handle, start_mark, &suffix)) - goto error; - - /* Set the handle to '!'. */ - - yaml_free(handle); - handle = yaml_malloc(2); - if (!handle) goto error; - handle[0] = '!'; - handle[1] = '\0'; - - /* - * A special case: the '!' tag. Set the handle to '' and the - * suffix to '!'. - */ - - if (suffix[0] == '\0') { - yaml_char_t *tmp = handle; - handle = suffix; - suffix = tmp; - } - } - } - - /* Check the character which ends the tag. */ - - if (!CACHE(parser, 1)) goto error; - - if (!IS_BLANKZ(parser->buffer)) { - yaml_parser_set_scanner_error(parser, "while scanning a tag", - start_mark, "did not find expected whitespace or line break"); - goto error; - } - - end_mark = parser->mark; - - /* Create a token. */ - - TAG_TOKEN_INIT(*token, handle, suffix, start_mark, end_mark); - - return 1; - -error: - yaml_free(handle); - yaml_free(suffix); - return 0; -} - -/* - * Scan a tag handle. - */ - -static int -yaml_parser_scan_tag_handle(yaml_parser_t *parser, int directive, - yaml_mark_t start_mark, yaml_char_t **handle) -{ - yaml_string_t string = NULL_STRING; - - if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; - - /* Check the initial '!' character. */ - - if (!CACHE(parser, 1)) goto error; - - if (!CHECK(parser->buffer, '!')) { - yaml_parser_set_scanner_error(parser, directive ? - "while scanning a tag directive" : "while scanning a tag", - start_mark, "did not find expected '!'"); - goto error; - } - - /* Copy the '!' character. */ - - if (!READ(parser, string)) goto error; - - /* Copy all subsequent alphabetical and numerical characters. */ - - if (!CACHE(parser, 1)) goto error; - - while (IS_ALPHA(parser->buffer)) - { - if (!READ(parser, string)) goto error; - if (!CACHE(parser, 1)) goto error; - } - - /* Check if the trailing character is '!' and copy it. */ - - if (CHECK(parser->buffer, '!')) - { - if (!READ(parser, string)) goto error; - } - else - { - /* - * It's either the '!' tag or not really a tag handle. If it's a %TAG - * directive, it's an error. If it's a tag token, it must be a part of - * URI. - */ - - if (directive && !(string.start[0] == '!' && string.start[1] == '\0')) { - yaml_parser_set_scanner_error(parser, "while parsing a tag directive", - start_mark, "did not find expected '!'"); - goto error; - } - } - - *handle = string.start; - - return 1; - -error: - STRING_DEL(parser, string); - return 0; -} - -/* - * Scan a tag. - */ - -static int -yaml_parser_scan_tag_uri(yaml_parser_t *parser, int directive, - yaml_char_t *head, yaml_mark_t start_mark, yaml_char_t **uri) -{ - size_t length = head ? strlen((char *)head) : 0; - yaml_string_t string = NULL_STRING; - - if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; - - /* Resize the string to include the head. */ - - while (string.end - string.start <= (int)length) { - if (!yaml_string_extend(&string.start, &string.pointer, &string.end)) { - parser->error = YAML_MEMORY_ERROR; - goto error; - } - } - - /* - * Copy the head if needed. - * - * Note that we don't copy the leading '!' character. - */ - - if (length > 1) { - memcpy(string.start, head+1, length-1); - string.pointer += length-1; - } - - /* Scan the tag. */ - - if (!CACHE(parser, 1)) goto error; - - /* - * The set of characters that may appear in URI is as follows: - * - * '0'-'9', 'A'-'Z', 'a'-'z', '_', '-', ';', '/', '?', ':', '@', '&', - * '=', '+', '$', ',', '.', '!', '~', '*', '\'', '(', ')', '[', ']', - * '%'. - */ - - while (IS_ALPHA(parser->buffer) || CHECK(parser->buffer, ';') - || CHECK(parser->buffer, '/') || CHECK(parser->buffer, '?') - || CHECK(parser->buffer, ':') || CHECK(parser->buffer, '@') - || CHECK(parser->buffer, '&') || CHECK(parser->buffer, '=') - || CHECK(parser->buffer, '+') || CHECK(parser->buffer, '$') - || CHECK(parser->buffer, ',') || CHECK(parser->buffer, '.') - || CHECK(parser->buffer, '!') || CHECK(parser->buffer, '~') - || CHECK(parser->buffer, '*') || CHECK(parser->buffer, '\'') - || CHECK(parser->buffer, '(') || CHECK(parser->buffer, ')') - || CHECK(parser->buffer, '[') || CHECK(parser->buffer, ']') - || CHECK(parser->buffer, '%')) - { - /* Check if it is a URI-escape sequence. */ - - if (CHECK(parser->buffer, '%')) { - if (!yaml_parser_scan_uri_escapes(parser, - directive, start_mark, &string)) goto error; - } - else { - if (!READ(parser, string)) goto error; - } - - length ++; - if (!CACHE(parser, 1)) goto error; - } - - /* Check if the tag is non-empty. */ - - if (!length) { - if (!STRING_EXTEND(parser, string)) - goto error; - - yaml_parser_set_scanner_error(parser, directive ? - "while parsing a %TAG directive" : "while parsing a tag", - start_mark, "did not find expected tag URI"); - goto error; - } - - *uri = string.start; - - return 1; - -error: - STRING_DEL(parser, string); - return 0; -} - -/* - * Decode an URI-escape sequence corresponding to a single UTF-8 character. - */ - -static int -yaml_parser_scan_uri_escapes(yaml_parser_t *parser, int directive, - yaml_mark_t start_mark, yaml_string_t *string) -{ - int width = 0; - - /* Decode the required number of characters. */ - - do { - - unsigned char octet = 0; - - /* Check for a URI-escaped octet. */ - - if (!CACHE(parser, 3)) return 0; - - if (!(CHECK(parser->buffer, '%') - && IS_HEX_AT(parser->buffer, 1) - && IS_HEX_AT(parser->buffer, 2))) { - return yaml_parser_set_scanner_error(parser, directive ? - "while parsing a %TAG directive" : "while parsing a tag", - start_mark, "did not find URI escaped octet"); - } - - /* Get the octet. */ - - octet = (AS_HEX_AT(parser->buffer, 1) << 4) + AS_HEX_AT(parser->buffer, 2); - - /* If it is the leading octet, determine the length of the UTF-8 sequence. */ - - if (!width) - { - width = (octet & 0x80) == 0x00 ? 1 : - (octet & 0xE0) == 0xC0 ? 2 : - (octet & 0xF0) == 0xE0 ? 3 : - (octet & 0xF8) == 0xF0 ? 4 : 0; - if (!width) { - return yaml_parser_set_scanner_error(parser, directive ? - "while parsing a %TAG directive" : "while parsing a tag", - start_mark, "found an incorrect leading UTF-8 octet"); - } - } - else - { - /* Check if the trailing octet is correct. */ - - if ((octet & 0xC0) != 0x80) { - return yaml_parser_set_scanner_error(parser, directive ? - "while parsing a %TAG directive" : "while parsing a tag", - start_mark, "found an incorrect trailing UTF-8 octet"); - } - } - - /* Copy the octet and move the pointers. */ - - *(string->pointer++) = octet; - SKIP(parser); - SKIP(parser); - SKIP(parser); - - } while (--width); - - return 1; -} - -/* - * Scan a block scalar. - */ - -static int -yaml_parser_scan_block_scalar(yaml_parser_t *parser, yaml_token_t *token, - int literal) -{ - yaml_mark_t start_mark; - yaml_mark_t end_mark; - yaml_string_t string = NULL_STRING; - yaml_string_t leading_break = NULL_STRING; - yaml_string_t trailing_breaks = NULL_STRING; - int chomping = 0; - int increment = 0; - int indent = 0; - int leading_blank = 0; - int trailing_blank = 0; - - if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; - if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error; - if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error; - - /* Eat the indicator '|' or '>'. */ - - start_mark = parser->mark; - - SKIP(parser); - - /* Scan the additional block scalar indicators. */ - - if (!CACHE(parser, 1)) goto error; - - /* Check for a chomping indicator. */ - - if (CHECK(parser->buffer, '+') || CHECK(parser->buffer, '-')) - { - /* Set the chomping method and eat the indicator. */ - - chomping = CHECK(parser->buffer, '+') ? +1 : -1; - - SKIP(parser); - - /* Check for an indentation indicator. */ - - if (!CACHE(parser, 1)) goto error; - - if (IS_DIGIT(parser->buffer)) - { - /* Check that the intendation is greater than 0. */ - - if (CHECK(parser->buffer, '0')) { - yaml_parser_set_scanner_error(parser, "while scanning a block scalar", - start_mark, "found an intendation indicator equal to 0"); - goto error; - } - - /* Get the intendation level and eat the indicator. */ - - increment = AS_DIGIT(parser->buffer); - - SKIP(parser); - } - } - - /* Do the same as above, but in the opposite order. */ - - else if (IS_DIGIT(parser->buffer)) - { - if (CHECK(parser->buffer, '0')) { - yaml_parser_set_scanner_error(parser, "while scanning a block scalar", - start_mark, "found an intendation indicator equal to 0"); - goto error; - } - - increment = AS_DIGIT(parser->buffer); - - SKIP(parser); - - if (!CACHE(parser, 1)) goto error; - - if (CHECK(parser->buffer, '+') || CHECK(parser->buffer, '-')) { - chomping = CHECK(parser->buffer, '+') ? +1 : -1; - - SKIP(parser); - } - } - - /* Eat whitespaces and comments to the end of the line. */ - - if (!CACHE(parser, 1)) goto error; - - while (IS_BLANK(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) goto error; - } - - if (CHECK(parser->buffer, '#')) { - while (!IS_BREAKZ(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) goto error; - } - } - - /* Check if we are at the end of the line. */ - - if (!IS_BREAKZ(parser->buffer)) { - yaml_parser_set_scanner_error(parser, "while scanning a block scalar", - start_mark, "did not find expected comment or line break"); - goto error; - } - - /* Eat a line break. */ - - if (IS_BREAK(parser->buffer)) { - if (!CACHE(parser, 2)) goto error; - SKIP_LINE(parser); - } - - end_mark = parser->mark; - - /* Set the intendation level if it was specified. */ - - if (increment) { - indent = parser->indent >= 0 ? parser->indent+increment : increment; - } - - /* Scan the leading line breaks and determine the indentation level if needed. */ - - if (!yaml_parser_scan_block_scalar_breaks(parser, &indent, &trailing_breaks, - start_mark, &end_mark)) goto error; - - /* Scan the block scalar content. */ - - if (!CACHE(parser, 1)) goto error; - - while ((int)parser->mark.column == indent && !IS_Z(parser->buffer)) - { - /* - * We are at the beginning of a non-empty line. - */ - - /* Is it a trailing whitespace? */ - - trailing_blank = IS_BLANK(parser->buffer); - - /* Check if we need to fold the leading line break. */ - - if (!literal && (*leading_break.start == '\n') - && !leading_blank && !trailing_blank) - { - /* Do we need to join the lines by space? */ - - if (*trailing_breaks.start == '\0') { - if (!STRING_EXTEND(parser, string)) goto error; - *(string.pointer ++) = ' '; - } - - CLEAR(parser, leading_break); - } - else { - if (!JOIN(parser, string, leading_break)) goto error; - CLEAR(parser, leading_break); - } - - /* Append the remaining line breaks. */ - - if (!JOIN(parser, string, trailing_breaks)) goto error; - CLEAR(parser, trailing_breaks); - - /* Is it a leading whitespace? */ - - leading_blank = IS_BLANK(parser->buffer); - - /* Consume the current line. */ - - while (!IS_BREAKZ(parser->buffer)) { - if (!READ(parser, string)) goto error; - if (!CACHE(parser, 1)) goto error; - } - - /* Consume the line break. */ - - if (!CACHE(parser, 2)) goto error; - - if (!READ_LINE(parser, leading_break)) goto error; - - /* Eat the following intendation spaces and line breaks. */ - - if (!yaml_parser_scan_block_scalar_breaks(parser, - &indent, &trailing_breaks, start_mark, &end_mark)) goto error; - } - - /* Chomp the tail. */ - - if (chomping != -1) { - if (!JOIN(parser, string, leading_break)) goto error; - } - if (chomping == 1) { - if (!JOIN(parser, string, trailing_breaks)) goto error; - } - - /* Create a token. */ - - SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start, - literal ? YAML_LITERAL_SCALAR_STYLE : YAML_FOLDED_SCALAR_STYLE, - start_mark, end_mark); - - STRING_DEL(parser, leading_break); - STRING_DEL(parser, trailing_breaks); - - return 1; - -error: - STRING_DEL(parser, string); - STRING_DEL(parser, leading_break); - STRING_DEL(parser, trailing_breaks); - - return 0; -} - -/* - * Scan intendation spaces and line breaks for a block scalar. Determine the - * intendation level if needed. - */ - -static int -yaml_parser_scan_block_scalar_breaks(yaml_parser_t *parser, - int *indent, yaml_string_t *breaks, - yaml_mark_t start_mark, yaml_mark_t *end_mark) -{ - int max_indent = 0; - - *end_mark = parser->mark; - - /* Eat the intendation spaces and line breaks. */ - - while (1) - { - /* Eat the intendation spaces. */ - - if (!CACHE(parser, 1)) return 0; - - while ((!*indent || (int)parser->mark.column < *indent) - && IS_SPACE(parser->buffer)) { - SKIP(parser); - if (!CACHE(parser, 1)) return 0; - } - - if ((int)parser->mark.column > max_indent) - max_indent = (int)parser->mark.column; - - /* Check for a tab character messing the intendation. */ - - if ((!*indent || (int)parser->mark.column < *indent) - && IS_TAB(parser->buffer)) { - return yaml_parser_set_scanner_error(parser, "while scanning a block scalar", - start_mark, "found a tab character where an intendation space is expected"); - } - - /* Have we found a non-empty line? */ - - if (!IS_BREAK(parser->buffer)) break; - - /* Consume the line break. */ - - if (!CACHE(parser, 2)) return 0; - if (!READ_LINE(parser, *breaks)) return 0; - *end_mark = parser->mark; - } - - /* Determine the indentation level if needed. */ - - if (!*indent) { - *indent = max_indent; - if (*indent < parser->indent + 1) - *indent = parser->indent + 1; - if (*indent < 1) - *indent = 1; - } - - return 1; -} - -/* - * Scan a quoted scalar. - */ - -static int -yaml_parser_scan_flow_scalar(yaml_parser_t *parser, yaml_token_t *token, - int single) -{ - yaml_mark_t start_mark; - yaml_mark_t end_mark; - yaml_string_t string = NULL_STRING; - yaml_string_t leading_break = NULL_STRING; - yaml_string_t trailing_breaks = NULL_STRING; - yaml_string_t whitespaces = NULL_STRING; - int leading_blanks; - - if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; - if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error; - if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error; - if (!STRING_INIT(parser, whitespaces, INITIAL_STRING_SIZE)) goto error; - - /* Eat the left quote. */ - - start_mark = parser->mark; - - SKIP(parser); - - /* Consume the content of the quoted scalar. */ - - while (1) - { - /* Check that there are no document indicators at the beginning of the line. */ - - if (!CACHE(parser, 4)) goto error; - - if (parser->mark.column == 0 && - ((CHECK_AT(parser->buffer, '-', 0) && - CHECK_AT(parser->buffer, '-', 1) && - CHECK_AT(parser->buffer, '-', 2)) || - (CHECK_AT(parser->buffer, '.', 0) && - CHECK_AT(parser->buffer, '.', 1) && - CHECK_AT(parser->buffer, '.', 2))) && - IS_BLANKZ_AT(parser->buffer, 3)) - { - yaml_parser_set_scanner_error(parser, "while scanning a quoted scalar", - start_mark, "found unexpected document indicator"); - goto error; - } - - /* Check for EOF. */ - - if (IS_Z(parser->buffer)) { - yaml_parser_set_scanner_error(parser, "while scanning a quoted scalar", - start_mark, "found unexpected end of stream"); - goto error; - } - - /* Consume non-blank characters. */ - - if (!CACHE(parser, 2)) goto error; - - leading_blanks = 0; - - while (!IS_BLANKZ(parser->buffer)) - { - /* Check for an escaped single quote. */ - - if (single && CHECK_AT(parser->buffer, '\'', 0) - && CHECK_AT(parser->buffer, '\'', 1)) - { - if (!STRING_EXTEND(parser, string)) goto error; - *(string.pointer++) = '\''; - SKIP(parser); - SKIP(parser); - } - - /* Check for the right quote. */ - - else if (CHECK(parser->buffer, single ? '\'' : '"')) - { - break; - } - - /* Check for an escaped line break. */ - - else if (!single && CHECK(parser->buffer, '\\') - && IS_BREAK_AT(parser->buffer, 1)) - { - if (!CACHE(parser, 3)) goto error; - SKIP(parser); - SKIP_LINE(parser); - leading_blanks = 1; - break; - } - - /* Check for an escape sequence. */ - - else if (!single && CHECK(parser->buffer, '\\')) - { - size_t code_length = 0; - - if (!STRING_EXTEND(parser, string)) goto error; - - /* Check the escape character. */ - - switch (parser->buffer.pointer[1]) - { - case '0': - *(string.pointer++) = '\0'; - break; - - case 'a': - *(string.pointer++) = '\x07'; - break; - - case 'b': - *(string.pointer++) = '\x08'; - break; - - case 't': - case '\t': - *(string.pointer++) = '\x09'; - break; - - case 'n': - *(string.pointer++) = '\x0A'; - break; - - case 'v': - *(string.pointer++) = '\x0B'; - break; - - case 'f': - *(string.pointer++) = '\x0C'; - break; - - case 'r': - *(string.pointer++) = '\x0D'; - break; - - case 'e': - *(string.pointer++) = '\x1B'; - break; - - case ' ': - *(string.pointer++) = '\x20'; - break; - - case '"': - *(string.pointer++) = '"'; - break; - - case '\'': - *(string.pointer++) = '\''; - break; - - case '\\': - *(string.pointer++) = '\\'; - break; - - case 'N': /* NEL (#x85) */ - *(string.pointer++) = '\xC2'; - *(string.pointer++) = '\x85'; - break; - - case '_': /* #xA0 */ - *(string.pointer++) = '\xC2'; - *(string.pointer++) = '\xA0'; - break; - - case 'L': /* LS (#x2028) */ - *(string.pointer++) = '\xE2'; - *(string.pointer++) = '\x80'; - *(string.pointer++) = '\xA8'; - break; - - case 'P': /* PS (#x2029) */ - *(string.pointer++) = '\xE2'; - *(string.pointer++) = '\x80'; - *(string.pointer++) = '\xA9'; - break; - - case 'x': - code_length = 2; - break; - - case 'u': - code_length = 4; - break; - - case 'U': - code_length = 8; - break; - - default: - yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar", - start_mark, "found unknown escape character"); - goto error; - } - - SKIP(parser); - SKIP(parser); - - /* Consume an arbitrary escape code. */ - - if (code_length) - { - unsigned int value = 0; - size_t k; - - /* Scan the character value. */ - - if (!CACHE(parser, code_length)) goto error; - - for (k = 0; k < code_length; k ++) { - if (!IS_HEX_AT(parser->buffer, k)) { - yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar", - start_mark, "did not find expected hexdecimal number"); - goto error; - } - value = (value << 4) + AS_HEX_AT(parser->buffer, k); - } - - /* Check the value and write the character. */ - - if ((value >= 0xD800 && value <= 0xDFFF) || value > 0x10FFFF) { - yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar", - start_mark, "found invalid Unicode character escape code"); - goto error; - } - - if (value <= 0x7F) { - *(string.pointer++) = value; - } - else if (value <= 0x7FF) { - *(string.pointer++) = 0xC0 + (value >> 6); - *(string.pointer++) = 0x80 + (value & 0x3F); - } - else if (value <= 0xFFFF) { - *(string.pointer++) = 0xE0 + (value >> 12); - *(string.pointer++) = 0x80 + ((value >> 6) & 0x3F); - *(string.pointer++) = 0x80 + (value & 0x3F); - } - else { - *(string.pointer++) = 0xF0 + (value >> 18); - *(string.pointer++) = 0x80 + ((value >> 12) & 0x3F); - *(string.pointer++) = 0x80 + ((value >> 6) & 0x3F); - *(string.pointer++) = 0x80 + (value & 0x3F); - } - - /* Advance the pointer. */ - - for (k = 0; k < code_length; k ++) { - SKIP(parser); - } - } - } - - else - { - /* It is a non-escaped non-blank character. */ - - if (!READ(parser, string)) goto error; - } - - if (!CACHE(parser, 2)) goto error; - } - - /* Check if we are at the end of the scalar. */ - - if (CHECK(parser->buffer, single ? '\'' : '"')) - break; - - /* Consume blank characters. */ - - if (!CACHE(parser, 1)) goto error; - - while (IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer)) - { - if (IS_BLANK(parser->buffer)) - { - /* Consume a space or a tab character. */ - - if (!leading_blanks) { - if (!READ(parser, whitespaces)) goto error; - } - else { - SKIP(parser); - } - } - else - { - if (!CACHE(parser, 2)) goto error; - - /* Check if it is a first line break. */ - - if (!leading_blanks) - { - CLEAR(parser, whitespaces); - if (!READ_LINE(parser, leading_break)) goto error; - leading_blanks = 1; - } - else - { - if (!READ_LINE(parser, trailing_breaks)) goto error; - } - } - if (!CACHE(parser, 1)) goto error; - } - - /* Join the whitespaces or fold line breaks. */ - - if (leading_blanks) - { - /* Do we need to fold line breaks? */ - - if (leading_break.start[0] == '\n') { - if (trailing_breaks.start[0] == '\0') { - if (!STRING_EXTEND(parser, string)) goto error; - *(string.pointer++) = ' '; - } - else { - if (!JOIN(parser, string, trailing_breaks)) goto error; - CLEAR(parser, trailing_breaks); - } - CLEAR(parser, leading_break); - } - else { - if (!JOIN(parser, string, leading_break)) goto error; - if (!JOIN(parser, string, trailing_breaks)) goto error; - CLEAR(parser, leading_break); - CLEAR(parser, trailing_breaks); - } - } - else - { - if (!JOIN(parser, string, whitespaces)) goto error; - CLEAR(parser, whitespaces); - } - } - - /* Eat the right quote. */ - - SKIP(parser); - - end_mark = parser->mark; - - /* Create a token. */ - - SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start, - single ? YAML_SINGLE_QUOTED_SCALAR_STYLE : YAML_DOUBLE_QUOTED_SCALAR_STYLE, - start_mark, end_mark); - - STRING_DEL(parser, leading_break); - STRING_DEL(parser, trailing_breaks); - STRING_DEL(parser, whitespaces); - - return 1; - -error: - STRING_DEL(parser, string); - STRING_DEL(parser, leading_break); - STRING_DEL(parser, trailing_breaks); - STRING_DEL(parser, whitespaces); - - return 0; -} - -/* - * Scan a plain scalar. - */ - -static int -yaml_parser_scan_plain_scalar(yaml_parser_t *parser, yaml_token_t *token) -{ - yaml_mark_t start_mark; - yaml_mark_t end_mark; - yaml_string_t string = NULL_STRING; - yaml_string_t leading_break = NULL_STRING; - yaml_string_t trailing_breaks = NULL_STRING; - yaml_string_t whitespaces = NULL_STRING; - int leading_blanks = 0; - int indent = parser->indent+1; - - if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error; - if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error; - if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error; - if (!STRING_INIT(parser, whitespaces, INITIAL_STRING_SIZE)) goto error; - - start_mark = end_mark = parser->mark; - - /* Consume the content of the plain scalar. */ - - while (1) - { - /* Check for a document indicator. */ - - if (!CACHE(parser, 4)) goto error; - - if (parser->mark.column == 0 && - ((CHECK_AT(parser->buffer, '-', 0) && - CHECK_AT(parser->buffer, '-', 1) && - CHECK_AT(parser->buffer, '-', 2)) || - (CHECK_AT(parser->buffer, '.', 0) && - CHECK_AT(parser->buffer, '.', 1) && - CHECK_AT(parser->buffer, '.', 2))) && - IS_BLANKZ_AT(parser->buffer, 3)) break; - - /* Check for a comment. */ - - if (CHECK(parser->buffer, '#')) - break; - - /* Consume non-blank characters. */ - - while (!IS_BLANKZ(parser->buffer)) - { - /* Check for 'x:x' in the flow context. TODO: Fix the test "spec-08-13". */ - - if (parser->flow_level - && CHECK(parser->buffer, ':') - && !IS_BLANKZ_AT(parser->buffer, 1)) { - yaml_parser_set_scanner_error(parser, "while scanning a plain scalar", - start_mark, "found unexpected ':'"); - goto error; - } - - /* Check for indicators that may end a plain scalar. */ - - if ((CHECK(parser->buffer, ':') && IS_BLANKZ_AT(parser->buffer, 1)) - || (parser->flow_level && - (CHECK(parser->buffer, ',') || CHECK(parser->buffer, ':') - || CHECK(parser->buffer, '?') || CHECK(parser->buffer, '[') - || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '{') - || CHECK(parser->buffer, '}')))) - break; - - /* Check if we need to join whitespaces and breaks. */ - - if (leading_blanks || whitespaces.start != whitespaces.pointer) - { - if (leading_blanks) - { - /* Do we need to fold line breaks? */ - - if (leading_break.start[0] == '\n') { - if (trailing_breaks.start[0] == '\0') { - if (!STRING_EXTEND(parser, string)) goto error; - *(string.pointer++) = ' '; - } - else { - if (!JOIN(parser, string, trailing_breaks)) goto error; - CLEAR(parser, trailing_breaks); - } - CLEAR(parser, leading_break); - } - else { - if (!JOIN(parser, string, leading_break)) goto error; - if (!JOIN(parser, string, trailing_breaks)) goto error; - CLEAR(parser, leading_break); - CLEAR(parser, trailing_breaks); - } - - leading_blanks = 0; - } - else - { - if (!JOIN(parser, string, whitespaces)) goto error; - CLEAR(parser, whitespaces); - } - } - - /* Copy the character. */ - - if (!READ(parser, string)) goto error; - - end_mark = parser->mark; - - if (!CACHE(parser, 2)) goto error; - } - - /* Is it the end? */ - - if (!(IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer))) - break; - - /* Consume blank characters. */ - - if (!CACHE(parser, 1)) goto error; - - while (IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer)) - { - if (IS_BLANK(parser->buffer)) - { - /* Check for tab character that abuse intendation. */ - - if (leading_blanks && (int)parser->mark.column < indent - && IS_TAB(parser->buffer)) { - yaml_parser_set_scanner_error(parser, "while scanning a plain scalar", - start_mark, "found a tab character that violate intendation"); - goto error; - } - - /* Consume a space or a tab character. */ - - if (!leading_blanks) { - if (!READ(parser, whitespaces)) goto error; - } - else { - SKIP(parser); - } - } - else - { - if (!CACHE(parser, 2)) goto error; - - /* Check if it is a first line break. */ - - if (!leading_blanks) - { - CLEAR(parser, whitespaces); - if (!READ_LINE(parser, leading_break)) goto error; - leading_blanks = 1; - } - else - { - if (!READ_LINE(parser, trailing_breaks)) goto error; - } - } - if (!CACHE(parser, 1)) goto error; - } - - /* Check intendation level. */ - - if (!parser->flow_level && (int)parser->mark.column < indent) - break; - } - - /* Create a token. */ - - SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start, - YAML_PLAIN_SCALAR_STYLE, start_mark, end_mark); - - /* Note that we change the 'simple_key_allowed' flag. */ - - if (leading_blanks) { - parser->simple_key_allowed = 1; - } - - STRING_DEL(parser, leading_break); - STRING_DEL(parser, trailing_breaks); - STRING_DEL(parser, whitespaces); - - return 1; - -error: - STRING_DEL(parser, string); - STRING_DEL(parser, leading_break); - STRING_DEL(parser, trailing_breaks); - STRING_DEL(parser, whitespaces); - - return 0; -} - ++/*+ * Introduction+ * ************+ *+ * The following notes assume that you are familiar with the YAML specification+ * (http://yaml.org/spec/cvs/current.html). We mostly follow it, although in+ * some cases we are less restrictive that it requires.+ *+ * The process of transforming a YAML stream into a sequence of events is+ * divided on two steps: Scanning and Parsing.+ *+ * The Scanner transforms the input stream into a sequence of tokens, while the+ * parser transform the sequence of tokens produced by the Scanner into a+ * sequence of parsing events.+ *+ * The Scanner is rather clever and complicated. The Parser, on the contrary,+ * is a straightforward implementation of a recursive-descendant parser (or,+ * LL(1) parser, as it is usually called).+ *+ * Actually there are two issues of Scanning that might be called "clever", the+ * rest is quite straightforward. The issues are "block collection start" and+ * "simple keys". Both issues are explained below in details.+ *+ * Here the Scanning step is explained and implemented. We start with the list+ * of all the tokens produced by the Scanner together with short descriptions.+ *+ * Now, tokens:+ *+ * STREAM-START(encoding) # The stream start.+ * STREAM-END # The stream end.+ * VERSION-DIRECTIVE(major,minor) # The '%YAML' directive.+ * TAG-DIRECTIVE(handle,prefix) # The '%TAG' directive.+ * DOCUMENT-START # '---'+ * DOCUMENT-END # '...'+ * BLOCK-SEQUENCE-START # Indentation increase denoting a block+ * BLOCK-MAPPING-START # sequence or a block mapping.+ * BLOCK-END # Indentation decrease.+ * FLOW-SEQUENCE-START # '['+ * FLOW-SEQUENCE-END # ']'+ * BLOCK-SEQUENCE-START # '{'+ * BLOCK-SEQUENCE-END # '}'+ * BLOCK-ENTRY # '-'+ * FLOW-ENTRY # ','+ * KEY # '?' or nothing (simple keys).+ * VALUE # ':'+ * ALIAS(anchor) # '*anchor'+ * ANCHOR(anchor) # '&anchor'+ * TAG(handle,suffix) # '!handle!suffix'+ * SCALAR(value,style) # A scalar.+ *+ * The following two tokens are "virtual" tokens denoting the beginning and the+ * end of the stream:+ *+ * STREAM-START(encoding)+ * STREAM-END+ *+ * We pass the information about the input stream encoding with the+ * STREAM-START token.+ *+ * The next two tokens are responsible for tags:+ *+ * VERSION-DIRECTIVE(major,minor)+ * TAG-DIRECTIVE(handle,prefix)+ *+ * Example:+ *+ * %YAML 1.1+ * %TAG ! !foo+ * %TAG !yaml! tag:yaml.org,2002:+ * ---+ *+ * The correspoding sequence of tokens:+ *+ * STREAM-START(utf-8)+ * VERSION-DIRECTIVE(1,1)+ * TAG-DIRECTIVE("!","!foo")+ * TAG-DIRECTIVE("!yaml","tag:yaml.org,2002:")+ * DOCUMENT-START+ * STREAM-END+ *+ * Note that the VERSION-DIRECTIVE and TAG-DIRECTIVE tokens occupy a whole+ * line.+ *+ * The document start and end indicators are represented by:+ *+ * DOCUMENT-START+ * DOCUMENT-END+ *+ * Note that if a YAML stream contains an implicit document (without '---'+ * and '...' indicators), no DOCUMENT-START and DOCUMENT-END tokens will be+ * produced.+ *+ * In the following examples, we present whole documents together with the+ * produced tokens.+ *+ * 1. An implicit document:+ *+ * 'a scalar'+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * SCALAR("a scalar",single-quoted)+ * STREAM-END+ *+ * 2. An explicit document:+ *+ * ---+ * 'a scalar'+ * ...+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * DOCUMENT-START+ * SCALAR("a scalar",single-quoted)+ * DOCUMENT-END+ * STREAM-END+ *+ * 3. Several documents in a stream:+ *+ * 'a scalar'+ * ---+ * 'another scalar'+ * ---+ * 'yet another scalar'+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * SCALAR("a scalar",single-quoted)+ * DOCUMENT-START+ * SCALAR("another scalar",single-quoted)+ * DOCUMENT-START+ * SCALAR("yet another scalar",single-quoted)+ * STREAM-END+ *+ * We have already introduced the SCALAR token above. The following tokens are+ * used to describe aliases, anchors, tag, and scalars:+ *+ * ALIAS(anchor)+ * ANCHOR(anchor)+ * TAG(handle,suffix)+ * SCALAR(value,style)+ *+ * The following series of examples illustrate the usage of these tokens:+ *+ * 1. A recursive sequence:+ *+ * &A [ *A ]+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * ANCHOR("A")+ * FLOW-SEQUENCE-START+ * ALIAS("A")+ * FLOW-SEQUENCE-END+ * STREAM-END+ *+ * 2. A tagged scalar:+ *+ * !!float "3.14" # A good approximation.+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * TAG("!!","float")+ * SCALAR("3.14",double-quoted)+ * STREAM-END+ *+ * 3. Various scalar styles:+ *+ * --- # Implicit empty plain scalars do not produce tokens.+ * --- a plain scalar+ * --- 'a single-quoted scalar'+ * --- "a double-quoted scalar"+ * --- |-+ * a literal scalar+ * --- >-+ * a folded+ * scalar+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * DOCUMENT-START+ * DOCUMENT-START+ * SCALAR("a plain scalar",plain)+ * DOCUMENT-START+ * SCALAR("a single-quoted scalar",single-quoted)+ * DOCUMENT-START+ * SCALAR("a double-quoted scalar",double-quoted)+ * DOCUMENT-START+ * SCALAR("a literal scalar",literal)+ * DOCUMENT-START+ * SCALAR("a folded scalar",folded)+ * STREAM-END+ *+ * Now it's time to review collection-related tokens. We will start with+ * flow collections:+ *+ * FLOW-SEQUENCE-START+ * FLOW-SEQUENCE-END+ * FLOW-MAPPING-START+ * FLOW-MAPPING-END+ * FLOW-ENTRY+ * KEY+ * VALUE+ *+ * The tokens FLOW-SEQUENCE-START, FLOW-SEQUENCE-END, FLOW-MAPPING-START, and+ * FLOW-MAPPING-END represent the indicators '[', ']', '{', and '}'+ * correspondingly. FLOW-ENTRY represent the ',' indicator. Finally the+ * indicators '?' and ':', which are used for denoting mapping keys and values,+ * are represented by the KEY and VALUE tokens.+ *+ * The following examples show flow collections:+ *+ * 1. A flow sequence:+ *+ * [item 1, item 2, item 3]+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * FLOW-SEQUENCE-START+ * SCALAR("item 1",plain)+ * FLOW-ENTRY+ * SCALAR("item 2",plain)+ * FLOW-ENTRY+ * SCALAR("item 3",plain)+ * FLOW-SEQUENCE-END+ * STREAM-END+ *+ * 2. A flow mapping:+ *+ * {+ * a simple key: a value, # Note that the KEY token is produced.+ * ? a complex key: another value,+ * }+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * FLOW-MAPPING-START+ * KEY+ * SCALAR("a simple key",plain)+ * VALUE+ * SCALAR("a value",plain)+ * FLOW-ENTRY+ * KEY+ * SCALAR("a complex key",plain)+ * VALUE+ * SCALAR("another value",plain)+ * FLOW-ENTRY+ * FLOW-MAPPING-END+ * STREAM-END+ *+ * A simple key is a key which is not denoted by the '?' indicator. Note that+ * the Scanner still produce the KEY token whenever it encounters a simple key.+ *+ * For scanning block collections, the following tokens are used (note that we+ * repeat KEY and VALUE here):+ *+ * BLOCK-SEQUENCE-START+ * BLOCK-MAPPING-START+ * BLOCK-END+ * BLOCK-ENTRY+ * KEY+ * VALUE+ *+ * The tokens BLOCK-SEQUENCE-START and BLOCK-MAPPING-START denote indentation+ * increase that precedes a block collection (cf. the INDENT token in Python).+ * The token BLOCK-END denote indentation decrease that ends a block collection+ * (cf. the DEDENT token in Python). However YAML has some syntax pecularities+ * that makes detections of these tokens more complex.+ *+ * The tokens BLOCK-ENTRY, KEY, and VALUE are used to represent the indicators+ * '-', '?', and ':' correspondingly.+ *+ * The following examples show how the tokens BLOCK-SEQUENCE-START,+ * BLOCK-MAPPING-START, and BLOCK-END are emitted by the Scanner:+ *+ * 1. Block sequences:+ *+ * - item 1+ * - item 2+ * -+ * - item 3.1+ * - item 3.2+ * -+ * key 1: value 1+ * key 2: value 2+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * BLOCK-SEQUENCE-START+ * BLOCK-ENTRY+ * SCALAR("item 1",plain)+ * BLOCK-ENTRY+ * SCALAR("item 2",plain)+ * BLOCK-ENTRY+ * BLOCK-SEQUENCE-START+ * BLOCK-ENTRY+ * SCALAR("item 3.1",plain)+ * BLOCK-ENTRY+ * SCALAR("item 3.2",plain)+ * BLOCK-END+ * BLOCK-ENTRY+ * BLOCK-MAPPING-START+ * KEY+ * SCALAR("key 1",plain)+ * VALUE+ * SCALAR("value 1",plain)+ * KEY+ * SCALAR("key 2",plain)+ * VALUE+ * SCALAR("value 2",plain)+ * BLOCK-END+ * BLOCK-END+ * STREAM-END+ *+ * 2. Block mappings:+ *+ * a simple key: a value # The KEY token is produced here.+ * ? a complex key+ * : another value+ * a mapping:+ * key 1: value 1+ * key 2: value 2+ * a sequence:+ * - item 1+ * - item 2+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * BLOCK-MAPPING-START+ * KEY+ * SCALAR("a simple key",plain)+ * VALUE+ * SCALAR("a value",plain)+ * KEY+ * SCALAR("a complex key",plain)+ * VALUE+ * SCALAR("another value",plain)+ * KEY+ * SCALAR("a mapping",plain)+ * BLOCK-MAPPING-START+ * KEY+ * SCALAR("key 1",plain)+ * VALUE+ * SCALAR("value 1",plain)+ * KEY+ * SCALAR("key 2",plain)+ * VALUE+ * SCALAR("value 2",plain)+ * BLOCK-END+ * KEY+ * SCALAR("a sequence",plain)+ * VALUE+ * BLOCK-SEQUENCE-START+ * BLOCK-ENTRY+ * SCALAR("item 1",plain)+ * BLOCK-ENTRY+ * SCALAR("item 2",plain)+ * BLOCK-END+ * BLOCK-END+ * STREAM-END+ *+ * YAML does not always require to start a new block collection from a new+ * line. If the current line contains only '-', '?', and ':' indicators, a new+ * block collection may start at the current line. The following examples+ * illustrate this case:+ *+ * 1. Collections in a sequence:+ *+ * - - item 1+ * - item 2+ * - key 1: value 1+ * key 2: value 2+ * - ? complex key+ * : complex value+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * BLOCK-SEQUENCE-START+ * BLOCK-ENTRY+ * BLOCK-SEQUENCE-START+ * BLOCK-ENTRY+ * SCALAR("item 1",plain)+ * BLOCK-ENTRY+ * SCALAR("item 2",plain)+ * BLOCK-END+ * BLOCK-ENTRY+ * BLOCK-MAPPING-START+ * KEY+ * SCALAR("key 1",plain)+ * VALUE+ * SCALAR("value 1",plain)+ * KEY+ * SCALAR("key 2",plain)+ * VALUE+ * SCALAR("value 2",plain)+ * BLOCK-END+ * BLOCK-ENTRY+ * BLOCK-MAPPING-START+ * KEY+ * SCALAR("complex key")+ * VALUE+ * SCALAR("complex value")+ * BLOCK-END+ * BLOCK-END+ * STREAM-END+ *+ * 2. Collections in a mapping:+ *+ * ? a sequence+ * : - item 1+ * - item 2+ * ? a mapping+ * : key 1: value 1+ * key 2: value 2+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * BLOCK-MAPPING-START+ * KEY+ * SCALAR("a sequence",plain)+ * VALUE+ * BLOCK-SEQUENCE-START+ * BLOCK-ENTRY+ * SCALAR("item 1",plain)+ * BLOCK-ENTRY+ * SCALAR("item 2",plain)+ * BLOCK-END+ * KEY+ * SCALAR("a mapping",plain)+ * VALUE+ * BLOCK-MAPPING-START+ * KEY+ * SCALAR("key 1",plain)+ * VALUE+ * SCALAR("value 1",plain)+ * KEY+ * SCALAR("key 2",plain)+ * VALUE+ * SCALAR("value 2",plain)+ * BLOCK-END+ * BLOCK-END+ * STREAM-END+ *+ * YAML also permits non-indented sequences if they are included into a block+ * mapping. In this case, the token BLOCK-SEQUENCE-START is not produced:+ *+ * key:+ * - item 1 # BLOCK-SEQUENCE-START is NOT produced here.+ * - item 2+ *+ * Tokens:+ *+ * STREAM-START(utf-8)+ * BLOCK-MAPPING-START+ * KEY+ * SCALAR("key",plain)+ * VALUE+ * BLOCK-ENTRY+ * SCALAR("item 1",plain)+ * BLOCK-ENTRY+ * SCALAR("item 2",plain)+ * BLOCK-END+ */++#include "yaml_private.h"++/*+ * Ensure that the buffer contains the required number of characters.+ * Return 1 on success, 0 on failure (reader error or memory error).+ */++#define CACHE(parser,length) \+ (parser->unread >= (length) \+ ? 1 \+ : yaml_parser_update_buffer(parser, (length)))++/*+ * Advance the buffer pointer.+ */++#define SKIP(parser) \+ (parser->mark.index ++, \+ parser->mark.column ++, \+ parser->unread --, \+ parser->buffer.pointer += WIDTH(parser->buffer))++#define SKIP_LINE(parser) \+ (IS_CRLF(parser->buffer) ? \+ (parser->mark.index += 2, \+ parser->mark.column = 0, \+ parser->mark.line ++, \+ parser->unread -= 2, \+ parser->buffer.pointer += 2) : \+ IS_BREAK(parser->buffer) ? \+ (parser->mark.index ++, \+ parser->mark.column = 0, \+ parser->mark.line ++, \+ parser->unread --, \+ parser->buffer.pointer += WIDTH(parser->buffer)) : 0)++/*+ * Copy a character to a string buffer and advance pointers.+ */++#define READ(parser,string) \+ (STRING_EXTEND(parser,string) ? \+ (COPY(string,parser->buffer), \+ parser->mark.index ++, \+ parser->mark.column ++, \+ parser->unread --, \+ 1) : 0)++/*+ * Copy a line break character to a string buffer and advance pointers.+ */++#define READ_LINE(parser,string) \+ (STRING_EXTEND(parser,string) ? \+ (((CHECK_AT(parser->buffer,'\r',0) \+ && CHECK_AT(parser->buffer,'\n',1)) ? /* CR LF -> LF */ \+ (*((string).pointer++) = (yaml_char_t) '\n', \+ parser->buffer.pointer += 2, \+ parser->mark.index += 2, \+ parser->mark.column = 0, \+ parser->mark.line ++, \+ parser->unread -= 2) : \+ (CHECK_AT(parser->buffer,'\r',0) \+ || CHECK_AT(parser->buffer,'\n',0)) ? /* CR|LF -> LF */ \+ (*((string).pointer++) = (yaml_char_t) '\n', \+ parser->buffer.pointer ++, \+ parser->mark.index ++, \+ parser->mark.column = 0, \+ parser->mark.line ++, \+ parser->unread --) : \+ (CHECK_AT(parser->buffer,'\xC2',0) \+ && CHECK_AT(parser->buffer,'\x85',1)) ? /* NEL -> LF */ \+ (*((string).pointer++) = (yaml_char_t) '\n', \+ parser->buffer.pointer += 2, \+ parser->mark.index ++, \+ parser->mark.column = 0, \+ parser->mark.line ++, \+ parser->unread --) : \+ (CHECK_AT(parser->buffer,'\xE2',0) && \+ CHECK_AT(parser->buffer,'\x80',1) && \+ (CHECK_AT(parser->buffer,'\xA8',2) || \+ CHECK_AT(parser->buffer,'\xA9',2))) ? /* LS|PS -> LS|PS */ \+ (*((string).pointer++) = *(parser->buffer.pointer++), \+ *((string).pointer++) = *(parser->buffer.pointer++), \+ *((string).pointer++) = *(parser->buffer.pointer++), \+ parser->mark.index ++, \+ parser->mark.column = 0, \+ parser->mark.line ++, \+ parser->unread --) : 0), \+ 1) : 0)++/*+ * Public API declarations.+ */++YAML_DECLARE(int)+yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token);++/*+ * Error handling.+ */++static int+yaml_parser_set_scanner_error(yaml_parser_t *parser, const char *context,+ yaml_mark_t context_mark, const char *problem);++/*+ * High-level token API.+ */++YAML_DECLARE(int)+yaml_parser_fetch_more_tokens(yaml_parser_t *parser);++static int+yaml_parser_fetch_next_token(yaml_parser_t *parser);++/*+ * Potential simple keys.+ */++static int+yaml_parser_stale_simple_keys(yaml_parser_t *parser);++static int+yaml_parser_save_simple_key(yaml_parser_t *parser);++static int+yaml_parser_remove_simple_key(yaml_parser_t *parser);++static int+yaml_parser_increase_flow_level(yaml_parser_t *parser);++static int+yaml_parser_decrease_flow_level(yaml_parser_t *parser);++/*+ * Indentation treatment.+ */++static int+yaml_parser_roll_indent(yaml_parser_t *parser, int column,+ int number, yaml_token_type_t type, yaml_mark_t mark);++static int+yaml_parser_unroll_indent(yaml_parser_t *parser, int column);++/*+ * Token fetchers.+ */++static int+yaml_parser_fetch_stream_start(yaml_parser_t *parser);++static int+yaml_parser_fetch_stream_end(yaml_parser_t *parser);++static int+yaml_parser_fetch_directive(yaml_parser_t *parser);++static int+yaml_parser_fetch_document_indicator(yaml_parser_t *parser,+ yaml_token_type_t type);++static int+yaml_parser_fetch_flow_collection_start(yaml_parser_t *parser,+ yaml_token_type_t type);++static int+yaml_parser_fetch_flow_collection_end(yaml_parser_t *parser,+ yaml_token_type_t type);++static int+yaml_parser_fetch_flow_entry(yaml_parser_t *parser);++static int+yaml_parser_fetch_block_entry(yaml_parser_t *parser);++static int+yaml_parser_fetch_key(yaml_parser_t *parser);++static int+yaml_parser_fetch_value(yaml_parser_t *parser);++static int+yaml_parser_fetch_anchor(yaml_parser_t *parser, yaml_token_type_t type);++static int+yaml_parser_fetch_tag(yaml_parser_t *parser);++static int+yaml_parser_fetch_block_scalar(yaml_parser_t *parser, int literal);++static int+yaml_parser_fetch_flow_scalar(yaml_parser_t *parser, int single);++static int+yaml_parser_fetch_plain_scalar(yaml_parser_t *parser);++/*+ * Token scanners.+ */++static int+yaml_parser_scan_to_next_token(yaml_parser_t *parser);++static int+yaml_parser_scan_directive(yaml_parser_t *parser, yaml_token_t *token);++static int+yaml_parser_scan_directive_name(yaml_parser_t *parser,+ yaml_mark_t start_mark, yaml_char_t **name);++static int+yaml_parser_scan_version_directive_value(yaml_parser_t *parser,+ yaml_mark_t start_mark, int *major, int *minor);++static int+yaml_parser_scan_version_directive_number(yaml_parser_t *parser,+ yaml_mark_t start_mark, int *number);++static int+yaml_parser_scan_tag_directive_value(yaml_parser_t *parser,+ yaml_mark_t mark, yaml_char_t **handle, yaml_char_t **prefix);++static int+yaml_parser_scan_anchor(yaml_parser_t *parser, yaml_token_t *token,+ yaml_token_type_t type);++static int+yaml_parser_scan_tag(yaml_parser_t *parser, yaml_token_t *token);++static int+yaml_parser_scan_tag_handle(yaml_parser_t *parser, int directive,+ yaml_mark_t start_mark, yaml_char_t **handle);++static int+yaml_parser_scan_tag_uri(yaml_parser_t *parser, int directive,+ yaml_char_t *head, yaml_mark_t start_mark, yaml_char_t **uri);++static int+yaml_parser_scan_uri_escapes(yaml_parser_t *parser, int directive,+ yaml_mark_t start_mark, yaml_string_t *string);++static int+yaml_parser_scan_block_scalar(yaml_parser_t *parser, yaml_token_t *token,+ int literal);++static int+yaml_parser_scan_block_scalar_breaks(yaml_parser_t *parser,+ int *indent, yaml_string_t *breaks,+ yaml_mark_t start_mark, yaml_mark_t *end_mark);++static int+yaml_parser_scan_flow_scalar(yaml_parser_t *parser, yaml_token_t *token,+ int single);++static int+yaml_parser_scan_plain_scalar(yaml_parser_t *parser, yaml_token_t *token);++/*+ * Get the next token.+ */++YAML_DECLARE(int)+yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token)+{+ assert(parser); /* Non-NULL parser object is expected. */+ assert(token); /* Non-NULL token object is expected. */++ /* Erase the token object. */++ memset(token, 0, sizeof(yaml_token_t));++ /* No tokens after STREAM-END or error. */++ if (parser->stream_end_produced || parser->error) {+ return 1;+ }++ /* Ensure that the tokens queue contains enough tokens. */++ if (!parser->token_available) {+ if (!yaml_parser_fetch_more_tokens(parser))+ return 0;+ }++ /* Fetch the next token from the queue. */+ + *token = DEQUEUE(parser, parser->tokens);+ parser->token_available = 0;+ parser->tokens_parsed ++;++ if (token->type == YAML_STREAM_END_TOKEN) {+ parser->stream_end_produced = 1;+ }++ return 1;+}++/*+ * Set the scanner error and return 0.+ */++static int+yaml_parser_set_scanner_error(yaml_parser_t *parser, const char *context,+ yaml_mark_t context_mark, const char *problem)+{+ parser->error = YAML_SCANNER_ERROR;+ parser->context = context;+ parser->context_mark = context_mark;+ parser->problem = problem;+ parser->problem_mark = parser->mark;++ return 0;+}++/*+ * Ensure that the tokens queue contains at least one token which can be+ * returned to the Parser.+ */++YAML_DECLARE(int)+yaml_parser_fetch_more_tokens(yaml_parser_t *parser)+{+ int need_more_tokens;++ /* While we need more tokens to fetch, do it. */++ while (1)+ {+ /*+ * Check if we really need to fetch more tokens.+ */++ need_more_tokens = 0;++ if (parser->tokens.head == parser->tokens.tail)+ {+ /* Queue is empty. */++ need_more_tokens = 1;+ }+ else+ {+ yaml_simple_key_t *simple_key;++ /* Check if any potential simple key may occupy the head position. */++ if (!yaml_parser_stale_simple_keys(parser))+ return 0;++ for (simple_key = parser->simple_keys.start;+ simple_key != parser->simple_keys.top; simple_key++) {+ if (simple_key->possible+ && simple_key->token_number == parser->tokens_parsed) {+ need_more_tokens = 1;+ break;+ }+ }+ }++ /* We are finished. */++ if (!need_more_tokens)+ break;++ /* Fetch the next token. */++ if (!yaml_parser_fetch_next_token(parser))+ return 0;+ }++ parser->token_available = 1;++ return 1;+}++/*+ * The dispatcher for token fetchers.+ */++static int+yaml_parser_fetch_next_token(yaml_parser_t *parser)+{+ /* Ensure that the buffer is initialized. */++ if (!CACHE(parser, 1))+ return 0;++ /* Check if we just started scanning. Fetch STREAM-START then. */++ if (!parser->stream_start_produced)+ return yaml_parser_fetch_stream_start(parser);++ /* Eat whitespaces and comments until we reach the next token. */++ if (!yaml_parser_scan_to_next_token(parser))+ return 0;++ /* Remove obsolete potential simple keys. */++ if (!yaml_parser_stale_simple_keys(parser))+ return 0;++ /* Check the indentation level against the current column. */++ if (!yaml_parser_unroll_indent(parser, parser->mark.column))+ return 0;++ /*+ * Ensure that the buffer contains at least 4 characters. 4 is the length+ * of the longest indicators ('--- ' and '... ').+ */++ if (!CACHE(parser, 4))+ return 0;++ /* Is it the end of the stream? */++ if (IS_Z(parser->buffer))+ return yaml_parser_fetch_stream_end(parser);++ /* Is it a directive? */++ if (parser->mark.column == 0 && CHECK(parser->buffer, '%'))+ return yaml_parser_fetch_directive(parser);++ /* Is it the document start indicator? */++ if (parser->mark.column == 0+ && CHECK_AT(parser->buffer, '-', 0)+ && CHECK_AT(parser->buffer, '-', 1)+ && CHECK_AT(parser->buffer, '-', 2)+ && IS_BLANKZ_AT(parser->buffer, 3))+ return yaml_parser_fetch_document_indicator(parser,+ YAML_DOCUMENT_START_TOKEN);++ /* Is it the document end indicator? */++ if (parser->mark.column == 0+ && CHECK_AT(parser->buffer, '.', 0)+ && CHECK_AT(parser->buffer, '.', 1)+ && CHECK_AT(parser->buffer, '.', 2)+ && IS_BLANKZ_AT(parser->buffer, 3))+ return yaml_parser_fetch_document_indicator(parser,+ YAML_DOCUMENT_END_TOKEN);++ /* Is it the flow sequence start indicator? */++ if (CHECK(parser->buffer, '['))+ return yaml_parser_fetch_flow_collection_start(parser,+ YAML_FLOW_SEQUENCE_START_TOKEN);++ /* Is it the flow mapping start indicator? */++ if (CHECK(parser->buffer, '{'))+ return yaml_parser_fetch_flow_collection_start(parser,+ YAML_FLOW_MAPPING_START_TOKEN);++ /* Is it the flow sequence end indicator? */++ if (CHECK(parser->buffer, ']'))+ return yaml_parser_fetch_flow_collection_end(parser,+ YAML_FLOW_SEQUENCE_END_TOKEN);++ /* Is it the flow mapping end indicator? */++ if (CHECK(parser->buffer, '}'))+ return yaml_parser_fetch_flow_collection_end(parser,+ YAML_FLOW_MAPPING_END_TOKEN);++ /* Is it the flow entry indicator? */++ if (CHECK(parser->buffer, ','))+ return yaml_parser_fetch_flow_entry(parser);++ /* Is it the block entry indicator? */++ if (CHECK(parser->buffer, '-') && IS_BLANKZ_AT(parser->buffer, 1))+ return yaml_parser_fetch_block_entry(parser);++ /* Is it the key indicator? */++ if (CHECK(parser->buffer, '?')+ && (parser->flow_level || IS_BLANKZ_AT(parser->buffer, 1)))+ return yaml_parser_fetch_key(parser);++ /* Is it the value indicator? */++ if (CHECK(parser->buffer, ':')+ && (parser->flow_level || IS_BLANKZ_AT(parser->buffer, 1)))+ return yaml_parser_fetch_value(parser);++ /* Is it an alias? */++ if (CHECK(parser->buffer, '*'))+ return yaml_parser_fetch_anchor(parser, YAML_ALIAS_TOKEN);++ /* Is it an anchor? */++ if (CHECK(parser->buffer, '&'))+ return yaml_parser_fetch_anchor(parser, YAML_ANCHOR_TOKEN);++ /* Is it a tag? */++ if (CHECK(parser->buffer, '!'))+ return yaml_parser_fetch_tag(parser);++ /* Is it a literal scalar? */++ if (CHECK(parser->buffer, '|') && !parser->flow_level)+ return yaml_parser_fetch_block_scalar(parser, 1);++ /* Is it a folded scalar? */++ if (CHECK(parser->buffer, '>') && !parser->flow_level)+ return yaml_parser_fetch_block_scalar(parser, 0);++ /* Is it a single-quoted scalar? */++ if (CHECK(parser->buffer, '\''))+ return yaml_parser_fetch_flow_scalar(parser, 1);++ /* Is it a double-quoted scalar? */++ if (CHECK(parser->buffer, '"'))+ return yaml_parser_fetch_flow_scalar(parser, 0);++ /*+ * Is it a plain scalar?+ *+ * A plain scalar may start with any non-blank characters except+ *+ * '-', '?', ':', ',', '[', ']', '{', '}',+ * '#', '&', '*', '!', '|', '>', '\'', '\"',+ * '%', '@', '`'.+ *+ * In the block context (and, for the '-' indicator, in the flow context+ * too), it may also start with the characters+ *+ * '-', '?', ':'+ *+ * if it is followed by a non-space character.+ *+ * The last rule is more restrictive than the specification requires.+ */++ if (!(IS_BLANKZ(parser->buffer) || CHECK(parser->buffer, '-')+ || CHECK(parser->buffer, '?') || CHECK(parser->buffer, ':')+ || CHECK(parser->buffer, ',') || CHECK(parser->buffer, '[')+ || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '{')+ || CHECK(parser->buffer, '}') || CHECK(parser->buffer, '#')+ || CHECK(parser->buffer, '&') || CHECK(parser->buffer, '*')+ || CHECK(parser->buffer, '!') || CHECK(parser->buffer, '|')+ || CHECK(parser->buffer, '>') || CHECK(parser->buffer, '\'')+ || CHECK(parser->buffer, '"') || CHECK(parser->buffer, '%')+ || CHECK(parser->buffer, '@') || CHECK(parser->buffer, '`')) ||+ (CHECK(parser->buffer, '-') && !IS_BLANK_AT(parser->buffer, 1)) ||+ (!parser->flow_level &&+ (CHECK(parser->buffer, '?') || CHECK(parser->buffer, ':'))+ && !IS_BLANKZ_AT(parser->buffer, 1)))+ return yaml_parser_fetch_plain_scalar(parser);++ /*+ * If we don't determine the token type so far, it is an error.+ */++ return yaml_parser_set_scanner_error(parser,+ "while scanning for the next token", parser->mark,+ "found character that cannot start any token");+}++/*+ * Check the list of potential simple keys and remove the positions that+ * cannot contain simple keys anymore.+ */++static int+yaml_parser_stale_simple_keys(yaml_parser_t *parser)+{+ yaml_simple_key_t *simple_key;++ /* Check for a potential simple key for each flow level. */++ for (simple_key = parser->simple_keys.start;+ simple_key != parser->simple_keys.top; simple_key ++)+ {+ /*+ * The specification requires that a simple key+ *+ * - is limited to a single line,+ * - is shorter than 1024 characters.+ */++ if (simple_key->possible+ && (simple_key->mark.line < parser->mark.line+ || simple_key->mark.index+1024 < parser->mark.index)) {++ /* Check if the potential simple key to be removed is required. */++ if (simple_key->required) {+ return yaml_parser_set_scanner_error(parser,+ "while scanning a simple key", simple_key->mark,+ "could not find expected ':'");+ }++ simple_key->possible = 0;+ }+ }++ return 1;+}++/*+ * Check if a simple key may start at the current position and add it if+ * needed.+ */++static int+yaml_parser_save_simple_key(yaml_parser_t *parser)+{+ /*+ * A simple key is required at the current position if the scanner is in+ * the block context and the current column coincides with the indentation+ * level.+ */++ int required = (!parser->flow_level+ && parser->indent == (int)parser->mark.column);++ /*+ * A simple key is required only when it is the first token in the current+ * line. Therefore it is always allowed. But we add a check anyway.+ */++ assert(parser->simple_key_allowed || !required); /* Impossible. */++ /*+ * If the current position may start a simple key, save it.+ */++ if (parser->simple_key_allowed)+ {+ yaml_simple_key_t simple_key = { 1, required,+ parser->tokens_parsed + parser->tokens.tail - parser->tokens.head,+ { 0, 0, 0 } };+ simple_key.mark = parser->mark;++ if (!yaml_parser_remove_simple_key(parser)) return 0;++ *(parser->simple_keys.top-1) = simple_key;+ }++ return 1;+}++/*+ * Remove a potential simple key at the current flow level.+ */++static int+yaml_parser_remove_simple_key(yaml_parser_t *parser)+{+ yaml_simple_key_t *simple_key = parser->simple_keys.top-1;++ if (simple_key->possible)+ {+ /* If the key is required, it is an error. */++ if (simple_key->required) {+ return yaml_parser_set_scanner_error(parser,+ "while scanning a simple key", simple_key->mark,+ "could not find expected ':'");+ }+ }++ /* Remove the key from the stack. */++ simple_key->possible = 0;++ return 1;+}++/*+ * Increase the flow level and resize the simple key list if needed.+ */++static int+yaml_parser_increase_flow_level(yaml_parser_t *parser)+{+ yaml_simple_key_t empty_simple_key = { 0, 0, 0, { 0, 0, 0 } };++ /* Reset the simple key on the next level. */++ if (!PUSH(parser, parser->simple_keys, empty_simple_key))+ return 0;++ /* Increase the flow level. */++ parser->flow_level++;++ return 1;+}++/*+ * Decrease the flow level.+ */++static int+yaml_parser_decrease_flow_level(yaml_parser_t *parser)+{+ yaml_simple_key_t dummy_key; /* Used to eliminate a compiler warning. */++ if (parser->flow_level) {+ parser->flow_level --;+ dummy_key = POP(parser, parser->simple_keys);+ }++ return 1;+}++/*+ * Push the current indentation level to the stack and set the new level+ * the current column is greater than the indentation level. In this case,+ * append or insert the specified token into the token queue.+ * + */++static int+yaml_parser_roll_indent(yaml_parser_t *parser, int column,+ int number, yaml_token_type_t type, yaml_mark_t mark)+{+ yaml_token_t token;++ /* In the flow context, do nothing. */++ if (parser->flow_level)+ return 1;++ if (parser->indent < column)+ {+ /*+ * Push the current indentation level to the stack and set the new+ * indentation level.+ */++ if (!PUSH(parser, parser->indents, parser->indent))+ return 0;++ parser->indent = column;++ /* Create a token and insert it into the queue. */++ TOKEN_INIT(token, type, mark, mark);++ if (number == -1) {+ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;+ }+ else {+ if (!QUEUE_INSERT(parser,+ parser->tokens, number - parser->tokens_parsed, token))+ return 0;+ }+ }++ return 1;+}++/*+ * Pop indentation levels from the indents stack until the current level+ * becomes less or equal to the column. For each intendation level, append+ * the BLOCK-END token.+ */+++static int+yaml_parser_unroll_indent(yaml_parser_t *parser, int column)+{+ yaml_token_t token;++ /* In the flow context, do nothing. */++ if (parser->flow_level)+ return 1;++ /* Loop through the intendation levels in the stack. */++ while (parser->indent > column)+ {+ /* Create a token and append it to the queue. */++ TOKEN_INIT(token, YAML_BLOCK_END_TOKEN, parser->mark, parser->mark);++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ /* Pop the indentation level. */++ parser->indent = POP(parser, parser->indents);+ }++ return 1;+}++/*+ * Initialize the scanner and produce the STREAM-START token.+ */++static int+yaml_parser_fetch_stream_start(yaml_parser_t *parser)+{+ yaml_simple_key_t simple_key = { 0, 0, 0, { 0, 0, 0 } };+ yaml_token_t token;++ /* Set the initial indentation. */++ parser->indent = -1;++ /* Initialize the simple key stack. */++ if (!PUSH(parser, parser->simple_keys, simple_key))+ return 0;++ /* A simple key is allowed at the beginning of the stream. */++ parser->simple_key_allowed = 1;++ /* We have started. */++ parser->stream_start_produced = 1;++ /* Create the STREAM-START token and append it to the queue. */++ STREAM_START_TOKEN_INIT(token, parser->encoding,+ parser->mark, parser->mark);++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce the STREAM-END token and shut down the scanner.+ */++static int+yaml_parser_fetch_stream_end(yaml_parser_t *parser)+{+ yaml_token_t token;++ /* Force new line. */++ if (parser->mark.column != 0) {+ parser->mark.column = 0;+ parser->mark.line ++;+ }++ /* Reset the indentation level. */++ if (!yaml_parser_unroll_indent(parser, -1))+ return 0;++ /* Reset simple keys. */++ if (!yaml_parser_remove_simple_key(parser))+ return 0;++ parser->simple_key_allowed = 0;++ /* Create the STREAM-END token and append it to the queue. */++ STREAM_END_TOKEN_INIT(token, parser->mark, parser->mark);++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce a VERSION-DIRECTIVE or TAG-DIRECTIVE token.+ */++static int+yaml_parser_fetch_directive(yaml_parser_t *parser)+{+ yaml_token_t token;++ /* Reset the indentation level. */++ if (!yaml_parser_unroll_indent(parser, -1))+ return 0;++ /* Reset simple keys. */++ if (!yaml_parser_remove_simple_key(parser))+ return 0;++ parser->simple_key_allowed = 0;++ /* Create the YAML-DIRECTIVE or TAG-DIRECTIVE token. */++ if (!yaml_parser_scan_directive(parser, &token))+ return 0;++ /* Append the token to the queue. */++ if (!ENQUEUE(parser, parser->tokens, token)) {+ yaml_token_delete(&token);+ return 0;+ }++ return 1;+}++/*+ * Produce the DOCUMENT-START or DOCUMENT-END token.+ */++static int+yaml_parser_fetch_document_indicator(yaml_parser_t *parser,+ yaml_token_type_t type)+{+ yaml_mark_t start_mark, end_mark;+ yaml_token_t token;++ /* Reset the indentation level. */++ if (!yaml_parser_unroll_indent(parser, -1))+ return 0;++ /* Reset simple keys. */++ if (!yaml_parser_remove_simple_key(parser))+ return 0;++ parser->simple_key_allowed = 0;++ /* Consume the token. */++ start_mark = parser->mark;++ SKIP(parser);+ SKIP(parser);+ SKIP(parser);++ end_mark = parser->mark;++ /* Create the DOCUMENT-START or DOCUMENT-END token. */++ TOKEN_INIT(token, type, start_mark, end_mark);++ /* Append the token to the queue. */++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce the FLOW-SEQUENCE-START or FLOW-MAPPING-START token.+ */++static int+yaml_parser_fetch_flow_collection_start(yaml_parser_t *parser,+ yaml_token_type_t type)+{+ yaml_mark_t start_mark, end_mark;+ yaml_token_t token;++ /* The indicators '[' and '{' may start a simple key. */++ if (!yaml_parser_save_simple_key(parser))+ return 0;++ /* Increase the flow level. */++ if (!yaml_parser_increase_flow_level(parser))+ return 0;++ /* A simple key may follow the indicators '[' and '{'. */++ parser->simple_key_allowed = 1;++ /* Consume the token. */++ start_mark = parser->mark;+ SKIP(parser);+ end_mark = parser->mark;++ /* Create the FLOW-SEQUENCE-START of FLOW-MAPPING-START token. */++ TOKEN_INIT(token, type, start_mark, end_mark);++ /* Append the token to the queue. */++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce the FLOW-SEQUENCE-END or FLOW-MAPPING-END token.+ */++static int+yaml_parser_fetch_flow_collection_end(yaml_parser_t *parser,+ yaml_token_type_t type)+{+ yaml_mark_t start_mark, end_mark;+ yaml_token_t token;++ /* Reset any potential simple key on the current flow level. */++ if (!yaml_parser_remove_simple_key(parser))+ return 0;++ /* Decrease the flow level. */++ if (!yaml_parser_decrease_flow_level(parser))+ return 0;++ /* No simple keys after the indicators ']' and '}'. */++ parser->simple_key_allowed = 0;++ /* Consume the token. */++ start_mark = parser->mark;+ SKIP(parser);+ end_mark = parser->mark;++ /* Create the FLOW-SEQUENCE-END of FLOW-MAPPING-END token. */++ TOKEN_INIT(token, type, start_mark, end_mark);++ /* Append the token to the queue. */++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce the FLOW-ENTRY token.+ */++static int+yaml_parser_fetch_flow_entry(yaml_parser_t *parser)+{+ yaml_mark_t start_mark, end_mark;+ yaml_token_t token;++ /* Reset any potential simple keys on the current flow level. */++ if (!yaml_parser_remove_simple_key(parser))+ return 0;++ /* Simple keys are allowed after ','. */++ parser->simple_key_allowed = 1;++ /* Consume the token. */++ start_mark = parser->mark;+ SKIP(parser);+ end_mark = parser->mark;++ /* Create the FLOW-ENTRY token and append it to the queue. */++ TOKEN_INIT(token, YAML_FLOW_ENTRY_TOKEN, start_mark, end_mark);++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce the BLOCK-ENTRY token.+ */++static int+yaml_parser_fetch_block_entry(yaml_parser_t *parser)+{+ yaml_mark_t start_mark, end_mark;+ yaml_token_t token;++ /* Check if the scanner is in the block context. */++ if (!parser->flow_level)+ {+ /* Check if we are allowed to start a new entry. */++ if (!parser->simple_key_allowed) {+ return yaml_parser_set_scanner_error(parser, NULL, parser->mark,+ "block sequence entries are not allowed in this context");+ }++ /* Add the BLOCK-SEQUENCE-START token if needed. */++ if (!yaml_parser_roll_indent(parser, parser->mark.column, -1,+ YAML_BLOCK_SEQUENCE_START_TOKEN, parser->mark))+ return 0;+ }+ else+ {+ /*+ * It is an error for the '-' indicator to occur in the flow context,+ * but we let the Parser detect and report about it because the Parser+ * is able to point to the context.+ */+ }++ /* Reset any potential simple keys on the current flow level. */++ if (!yaml_parser_remove_simple_key(parser))+ return 0;++ /* Simple keys are allowed after '-'. */++ parser->simple_key_allowed = 1;++ /* Consume the token. */++ start_mark = parser->mark;+ SKIP(parser);+ end_mark = parser->mark;++ /* Create the BLOCK-ENTRY token and append it to the queue. */++ TOKEN_INIT(token, YAML_BLOCK_ENTRY_TOKEN, start_mark, end_mark);++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce the KEY token.+ */++static int+yaml_parser_fetch_key(yaml_parser_t *parser)+{+ yaml_mark_t start_mark, end_mark;+ yaml_token_t token;++ /* In the block context, additional checks are required. */++ if (!parser->flow_level)+ {+ /* Check if we are allowed to start a new key (not nessesary simple). */++ if (!parser->simple_key_allowed) {+ return yaml_parser_set_scanner_error(parser, NULL, parser->mark,+ "mapping keys are not allowed in this context");+ }++ /* Add the BLOCK-MAPPING-START token if needed. */++ if (!yaml_parser_roll_indent(parser, parser->mark.column, -1,+ YAML_BLOCK_MAPPING_START_TOKEN, parser->mark))+ return 0;+ }++ /* Reset any potential simple keys on the current flow level. */++ if (!yaml_parser_remove_simple_key(parser))+ return 0;++ /* Simple keys are allowed after '?' in the block context. */++ parser->simple_key_allowed = (!parser->flow_level);++ /* Consume the token. */++ start_mark = parser->mark;+ SKIP(parser);+ end_mark = parser->mark;++ /* Create the KEY token and append it to the queue. */++ TOKEN_INIT(token, YAML_KEY_TOKEN, start_mark, end_mark);++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce the VALUE token.+ */++static int+yaml_parser_fetch_value(yaml_parser_t *parser)+{+ yaml_mark_t start_mark, end_mark;+ yaml_token_t token;+ yaml_simple_key_t *simple_key = parser->simple_keys.top-1;++ /* Have we found a simple key? */++ if (simple_key->possible)+ {++ /* Create the KEY token and insert it into the queue. */++ TOKEN_INIT(token, YAML_KEY_TOKEN, simple_key->mark, simple_key->mark);++ if (!QUEUE_INSERT(parser, parser->tokens,+ simple_key->token_number - parser->tokens_parsed, token))+ return 0;++ /* In the block context, we may need to add the BLOCK-MAPPING-START token. */++ if (!yaml_parser_roll_indent(parser, simple_key->mark.column,+ simple_key->token_number,+ YAML_BLOCK_MAPPING_START_TOKEN, simple_key->mark))+ return 0;++ /* Remove the simple key. */++ simple_key->possible = 0;++ /* A simple key cannot follow another simple key. */++ parser->simple_key_allowed = 0;+ }+ else+ {+ /* The ':' indicator follows a complex key. */++ /* In the block context, extra checks are required. */++ if (!parser->flow_level)+ {+ /* Check if we are allowed to start a complex value. */++ if (!parser->simple_key_allowed) {+ return yaml_parser_set_scanner_error(parser, NULL, parser->mark,+ "mapping values are not allowed in this context");+ }++ /* Add the BLOCK-MAPPING-START token if needed. */++ if (!yaml_parser_roll_indent(parser, parser->mark.column, -1,+ YAML_BLOCK_MAPPING_START_TOKEN, parser->mark))+ return 0;+ }++ /* Simple keys after ':' are allowed in the block context. */++ parser->simple_key_allowed = (!parser->flow_level);+ }++ /* Consume the token. */++ start_mark = parser->mark;+ SKIP(parser);+ end_mark = parser->mark;++ /* Create the VALUE token and append it to the queue. */++ TOKEN_INIT(token, YAML_VALUE_TOKEN, start_mark, end_mark);++ if (!ENQUEUE(parser, parser->tokens, token))+ return 0;++ return 1;+}++/*+ * Produce the ALIAS or ANCHOR token.+ */++static int+yaml_parser_fetch_anchor(yaml_parser_t *parser, yaml_token_type_t type)+{+ yaml_token_t token;++ /* An anchor or an alias could be a simple key. */++ if (!yaml_parser_save_simple_key(parser))+ return 0;++ /* A simple key cannot follow an anchor or an alias. */++ parser->simple_key_allowed = 0;++ /* Create the ALIAS or ANCHOR token and append it to the queue. */++ if (!yaml_parser_scan_anchor(parser, &token, type))+ return 0;++ if (!ENQUEUE(parser, parser->tokens, token)) {+ yaml_token_delete(&token);+ return 0;+ }+ return 1;+}++/*+ * Produce the TAG token.+ */++static int+yaml_parser_fetch_tag(yaml_parser_t *parser)+{+ yaml_token_t token;++ /* A tag could be a simple key. */++ if (!yaml_parser_save_simple_key(parser))+ return 0;++ /* A simple key cannot follow a tag. */++ parser->simple_key_allowed = 0;++ /* Create the TAG token and append it to the queue. */++ if (!yaml_parser_scan_tag(parser, &token))+ return 0;++ if (!ENQUEUE(parser, parser->tokens, token)) {+ yaml_token_delete(&token);+ return 0;+ }++ return 1;+}++/*+ * Produce the SCALAR(...,literal) or SCALAR(...,folded) tokens.+ */++static int+yaml_parser_fetch_block_scalar(yaml_parser_t *parser, int literal)+{+ yaml_token_t token;++ /* Remove any potential simple keys. */++ if (!yaml_parser_remove_simple_key(parser))+ return 0;++ /* A simple key may follow a block scalar. */++ parser->simple_key_allowed = 1;++ /* Create the SCALAR token and append it to the queue. */++ if (!yaml_parser_scan_block_scalar(parser, &token, literal))+ return 0;++ if (!ENQUEUE(parser, parser->tokens, token)) {+ yaml_token_delete(&token);+ return 0;+ }++ return 1;+}++/*+ * Produce the SCALAR(...,single-quoted) or SCALAR(...,double-quoted) tokens.+ */++static int+yaml_parser_fetch_flow_scalar(yaml_parser_t *parser, int single)+{+ yaml_token_t token;++ /* A plain scalar could be a simple key. */++ if (!yaml_parser_save_simple_key(parser))+ return 0;++ /* A simple key cannot follow a flow scalar. */++ parser->simple_key_allowed = 0;++ /* Create the SCALAR token and append it to the queue. */++ if (!yaml_parser_scan_flow_scalar(parser, &token, single))+ return 0;++ if (!ENQUEUE(parser, parser->tokens, token)) {+ yaml_token_delete(&token);+ return 0;+ }++ return 1;+}++/*+ * Produce the SCALAR(...,plain) token.+ */++static int+yaml_parser_fetch_plain_scalar(yaml_parser_t *parser)+{+ yaml_token_t token;++ /* A plain scalar could be a simple key. */++ if (!yaml_parser_save_simple_key(parser))+ return 0;++ /* A simple key cannot follow a flow scalar. */++ parser->simple_key_allowed = 0;++ /* Create the SCALAR token and append it to the queue. */++ if (!yaml_parser_scan_plain_scalar(parser, &token))+ return 0;++ if (!ENQUEUE(parser, parser->tokens, token)) {+ yaml_token_delete(&token);+ return 0;+ }++ return 1;+}++/*+ * Eat whitespaces and comments until the next token is found.+ */++static int+yaml_parser_scan_to_next_token(yaml_parser_t *parser)+{+ /* Until the next token is not found. */++ while (1)+ {+ /* Allow the BOM mark to start a line. */++ if (!CACHE(parser, 1)) return 0;++ if (parser->mark.column == 0 && IS_BOM(parser->buffer))+ SKIP(parser);++ /*+ * Eat whitespaces.+ *+ * Tabs are allowed:+ *+ * - in the flow context;+ * - in the block context, but not at the beginning of the line or+ * after '-', '?', or ':' (complex value). + */++ if (!CACHE(parser, 1)) return 0;++ while (CHECK(parser->buffer,' ') ||+ ((parser->flow_level || !parser->simple_key_allowed) &&+ CHECK(parser->buffer, '\t'))) {+ SKIP(parser);+ if (!CACHE(parser, 1)) return 0;+ }++ /* Eat a comment until a line break. */++ if (CHECK(parser->buffer, '#')) {+ while (!IS_BREAKZ(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) return 0;+ }+ }++ /* If it is a line break, eat it. */++ if (IS_BREAK(parser->buffer))+ {+ if (!CACHE(parser, 2)) return 0;+ SKIP_LINE(parser);++ /* In the block context, a new line may start a simple key. */++ if (!parser->flow_level) {+ parser->simple_key_allowed = 1;+ }+ }+ else+ {+ /* We have found a token. */++ break;+ }+ }++ return 1;+}++/*+ * Scan a YAML-DIRECTIVE or TAG-DIRECTIVE token.+ *+ * Scope:+ * %YAML 1.1 # a comment \n+ * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^+ * %TAG !yaml! tag:yaml.org,2002: \n+ * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^+ */++int+yaml_parser_scan_directive(yaml_parser_t *parser, yaml_token_t *token)+{+ yaml_mark_t start_mark, end_mark;+ yaml_char_t *name = NULL;+ int major, minor;+ yaml_char_t *handle = NULL, *prefix = NULL;++ /* Eat '%'. */++ start_mark = parser->mark;++ SKIP(parser);++ /* Scan the directive name. */++ if (!yaml_parser_scan_directive_name(parser, start_mark, &name))+ goto error;++ /* Is it a YAML directive? */++ if (strcmp((char *)name, "YAML") == 0)+ {+ /* Scan the VERSION directive value. */++ if (!yaml_parser_scan_version_directive_value(parser, start_mark,+ &major, &minor))+ goto error;++ end_mark = parser->mark;++ /* Create a VERSION-DIRECTIVE token. */++ VERSION_DIRECTIVE_TOKEN_INIT(*token, major, minor,+ start_mark, end_mark);+ }++ /* Is it a TAG directive? */++ else if (strcmp((char *)name, "TAG") == 0)+ {+ /* Scan the TAG directive value. */++ if (!yaml_parser_scan_tag_directive_value(parser, start_mark,+ &handle, &prefix))+ goto error;++ end_mark = parser->mark;++ /* Create a TAG-DIRECTIVE token. */++ TAG_DIRECTIVE_TOKEN_INIT(*token, handle, prefix,+ start_mark, end_mark);+ }++ /* Unknown directive. */++ else+ {+ yaml_parser_set_scanner_error(parser, "while scanning a directive",+ start_mark, "found uknown directive name");+ goto error;+ }++ /* Eat the rest of the line including any comments. */++ if (!CACHE(parser, 1)) goto error;++ while (IS_BLANK(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) goto error;+ }++ if (CHECK(parser->buffer, '#')) {+ while (!IS_BREAKZ(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) goto error;+ }+ }++ /* Check if we are at the end of the line. */++ if (!IS_BREAKZ(parser->buffer)) {+ yaml_parser_set_scanner_error(parser, "while scanning a directive",+ start_mark, "did not find expected comment or line break");+ goto error;+ }++ /* Eat a line break. */++ if (IS_BREAK(parser->buffer)) {+ if (!CACHE(parser, 2)) goto error;+ SKIP_LINE(parser);+ }++ yaml_free(name);++ return 1;++error:+ yaml_free(prefix);+ yaml_free(handle);+ yaml_free(name);+ return 0;+}++/*+ * Scan the directive name.+ *+ * Scope:+ * %YAML 1.1 # a comment \n+ * ^^^^+ * %TAG !yaml! tag:yaml.org,2002: \n+ * ^^^+ */++static int+yaml_parser_scan_directive_name(yaml_parser_t *parser,+ yaml_mark_t start_mark, yaml_char_t **name)+{+ yaml_string_t string = NULL_STRING;++ if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error;++ /* Consume the directive name. */++ if (!CACHE(parser, 1)) goto error;++ while (IS_ALPHA(parser->buffer))+ {+ if (!READ(parser, string)) goto error;+ if (!CACHE(parser, 1)) goto error;+ }++ /* Check if the name is empty. */++ if (string.start == string.pointer) {+ yaml_parser_set_scanner_error(parser, "while scanning a directive",+ start_mark, "could not find expected directive name");+ goto error;+ }++ /* Check for an blank character after the name. */++ if (!IS_BLANKZ(parser->buffer)) {+ yaml_parser_set_scanner_error(parser, "while scanning a directive",+ start_mark, "found unexpected non-alphabetical character");+ goto error;+ }++ *name = string.start;++ return 1;++error:+ STRING_DEL(parser, string);+ return 0;+}++/*+ * Scan the value of VERSION-DIRECTIVE.+ *+ * Scope:+ * %YAML 1.1 # a comment \n+ * ^^^^^^+ */++static int+yaml_parser_scan_version_directive_value(yaml_parser_t *parser,+ yaml_mark_t start_mark, int *major, int *minor)+{+ /* Eat whitespaces. */++ if (!CACHE(parser, 1)) return 0;++ while (IS_BLANK(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) return 0;+ }++ /* Consume the major version number. */++ if (!yaml_parser_scan_version_directive_number(parser, start_mark, major))+ return 0;++ /* Eat '.'. */++ if (!CHECK(parser->buffer, '.')) {+ return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive",+ start_mark, "did not find expected digit or '.' character");+ }++ SKIP(parser);++ /* Consume the minor version number. */++ if (!yaml_parser_scan_version_directive_number(parser, start_mark, minor))+ return 0;++ return 1;+}++#define MAX_NUMBER_LENGTH 9++/*+ * Scan the version number of VERSION-DIRECTIVE.+ *+ * Scope:+ * %YAML 1.1 # a comment \n+ * ^+ * %YAML 1.1 # a comment \n+ * ^+ */++static int+yaml_parser_scan_version_directive_number(yaml_parser_t *parser,+ yaml_mark_t start_mark, int *number)+{+ int value = 0;+ size_t length = 0;++ /* Repeat while the next character is digit. */++ if (!CACHE(parser, 1)) return 0;++ while (IS_DIGIT(parser->buffer))+ {+ /* Check if the number is too long. */++ if (++length > MAX_NUMBER_LENGTH) {+ return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive",+ start_mark, "found extremely long version number");+ }++ value = value*10 + AS_DIGIT(parser->buffer);++ SKIP(parser);++ if (!CACHE(parser, 1)) return 0;+ }++ /* Check if the number was present. */++ if (!length) {+ return yaml_parser_set_scanner_error(parser, "while scanning a %YAML directive",+ start_mark, "did not find expected version number");+ }++ *number = value;++ return 1;+}++/*+ * Scan the value of a TAG-DIRECTIVE token.+ *+ * Scope:+ * %TAG !yaml! tag:yaml.org,2002: \n+ * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^+ */++static int+yaml_parser_scan_tag_directive_value(yaml_parser_t *parser,+ yaml_mark_t start_mark, yaml_char_t **handle, yaml_char_t **prefix)+{+ yaml_char_t *handle_value = NULL;+ yaml_char_t *prefix_value = NULL;++ /* Eat whitespaces. */++ if (!CACHE(parser, 1)) goto error;++ while (IS_BLANK(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) goto error;+ }++ /* Scan a handle. */++ if (!yaml_parser_scan_tag_handle(parser, 1, start_mark, &handle_value))+ goto error;++ /* Expect a whitespace. */++ if (!CACHE(parser, 1)) goto error;++ if (!IS_BLANK(parser->buffer)) {+ yaml_parser_set_scanner_error(parser, "while scanning a %TAG directive",+ start_mark, "did not find expected whitespace");+ goto error;+ }++ /* Eat whitespaces. */++ while (IS_BLANK(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) goto error;+ }++ /* Scan a prefix. */++ if (!yaml_parser_scan_tag_uri(parser, 1, NULL, start_mark, &prefix_value))+ goto error;++ /* Expect a whitespace or line break. */++ if (!CACHE(parser, 1)) goto error;++ if (!IS_BLANKZ(parser->buffer)) {+ yaml_parser_set_scanner_error(parser, "while scanning a %TAG directive",+ start_mark, "did not find expected whitespace or line break");+ goto error;+ }++ *handle = handle_value;+ *prefix = prefix_value;++ return 1;++error:+ yaml_free(handle_value);+ yaml_free(prefix_value);+ return 0;+}++static int+yaml_parser_scan_anchor(yaml_parser_t *parser, yaml_token_t *token,+ yaml_token_type_t type)+{+ int length = 0;+ yaml_mark_t start_mark, end_mark;+ yaml_string_t string = NULL_STRING;++ if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error;++ /* Eat the indicator character. */++ start_mark = parser->mark;++ SKIP(parser);++ /* Consume the value. */++ if (!CACHE(parser, 1)) goto error;++ while (IS_ALPHA(parser->buffer)) {+ if (!READ(parser, string)) goto error;+ if (!CACHE(parser, 1)) goto error;+ length ++;+ }++ end_mark = parser->mark;++ /*+ * Check if length of the anchor is greater than 0 and it is followed by+ * a whitespace character or one of the indicators:+ *+ * '?', ':', ',', ']', '}', '%', '@', '`'.+ */++ if (!length || !(IS_BLANKZ(parser->buffer) || CHECK(parser->buffer, '?')+ || CHECK(parser->buffer, ':') || CHECK(parser->buffer, ',')+ || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '}')+ || CHECK(parser->buffer, '%') || CHECK(parser->buffer, '@')+ || CHECK(parser->buffer, '`'))) {+ yaml_parser_set_scanner_error(parser, type == YAML_ANCHOR_TOKEN ?+ "while scanning an anchor" : "while scanning an alias", start_mark,+ "did not find expected alphabetic or numeric character");+ goto error;+ }++ /* Create a token. */++ if (type == YAML_ANCHOR_TOKEN) {+ ANCHOR_TOKEN_INIT(*token, string.start, start_mark, end_mark);+ }+ else {+ ALIAS_TOKEN_INIT(*token, string.start, start_mark, end_mark);+ }++ return 1;++error:+ STRING_DEL(parser, string);+ return 0;+}++/*+ * Scan a TAG token.+ */++static int+yaml_parser_scan_tag(yaml_parser_t *parser, yaml_token_t *token)+{+ yaml_char_t *handle = NULL;+ yaml_char_t *suffix = NULL;+ yaml_mark_t start_mark, end_mark;++ start_mark = parser->mark;++ /* Check if the tag is in the canonical form. */++ if (!CACHE(parser, 2)) goto error;++ if (CHECK_AT(parser->buffer, '<', 1))+ {+ /* Set the handle to '' */++ handle = yaml_malloc(1);+ if (!handle) goto error;+ handle[0] = '\0';++ /* Eat '!<' */++ SKIP(parser);+ SKIP(parser);++ /* Consume the tag value. */++ if (!yaml_parser_scan_tag_uri(parser, 0, NULL, start_mark, &suffix))+ goto error;++ /* Check for '>' and eat it. */++ if (!CHECK(parser->buffer, '>')) {+ yaml_parser_set_scanner_error(parser, "while scanning a tag",+ start_mark, "did not find the expected '>'");+ goto error;+ }++ SKIP(parser);+ }+ else+ {+ /* The tag has either the '!suffix' or the '!handle!suffix' form. */++ /* First, try to scan a handle. */++ if (!yaml_parser_scan_tag_handle(parser, 0, start_mark, &handle))+ goto error;++ /* Check if it is, indeed, handle. */++ if (handle[0] == '!' && handle[1] != '\0' && handle[strlen((char *)handle)-1] == '!')+ {+ /* Scan the suffix now. */++ if (!yaml_parser_scan_tag_uri(parser, 0, NULL, start_mark, &suffix))+ goto error;+ }+ else+ {+ /* It wasn't a handle after all. Scan the rest of the tag. */++ if (!yaml_parser_scan_tag_uri(parser, 0, handle, start_mark, &suffix))+ goto error;++ /* Set the handle to '!'. */++ yaml_free(handle);+ handle = yaml_malloc(2);+ if (!handle) goto error;+ handle[0] = '!';+ handle[1] = '\0';++ /*+ * A special case: the '!' tag. Set the handle to '' and the+ * suffix to '!'.+ */++ if (suffix[0] == '\0') {+ yaml_char_t *tmp = handle;+ handle = suffix;+ suffix = tmp;+ }+ }+ }++ /* Check the character which ends the tag. */++ if (!CACHE(parser, 1)) goto error;++ if (!IS_BLANKZ(parser->buffer)) {+ yaml_parser_set_scanner_error(parser, "while scanning a tag",+ start_mark, "did not find expected whitespace or line break");+ goto error;+ }++ end_mark = parser->mark;++ /* Create a token. */++ TAG_TOKEN_INIT(*token, handle, suffix, start_mark, end_mark);++ return 1;++error:+ yaml_free(handle);+ yaml_free(suffix);+ return 0;+}++/*+ * Scan a tag handle.+ */++static int+yaml_parser_scan_tag_handle(yaml_parser_t *parser, int directive,+ yaml_mark_t start_mark, yaml_char_t **handle)+{+ yaml_string_t string = NULL_STRING;++ if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error;++ /* Check the initial '!' character. */++ if (!CACHE(parser, 1)) goto error;++ if (!CHECK(parser->buffer, '!')) {+ yaml_parser_set_scanner_error(parser, directive ?+ "while scanning a tag directive" : "while scanning a tag",+ start_mark, "did not find expected '!'");+ goto error;+ }++ /* Copy the '!' character. */++ if (!READ(parser, string)) goto error;++ /* Copy all subsequent alphabetical and numerical characters. */++ if (!CACHE(parser, 1)) goto error;++ while (IS_ALPHA(parser->buffer))+ {+ if (!READ(parser, string)) goto error;+ if (!CACHE(parser, 1)) goto error;+ }++ /* Check if the trailing character is '!' and copy it. */++ if (CHECK(parser->buffer, '!'))+ {+ if (!READ(parser, string)) goto error;+ }+ else+ {+ /*+ * It's either the '!' tag or not really a tag handle. If it's a %TAG+ * directive, it's an error. If it's a tag token, it must be a part of+ * URI.+ */++ if (directive && !(string.start[0] == '!' && string.start[1] == '\0')) {+ yaml_parser_set_scanner_error(parser, "while parsing a tag directive",+ start_mark, "did not find expected '!'");+ goto error;+ }+ }++ *handle = string.start;++ return 1;++error:+ STRING_DEL(parser, string);+ return 0;+}++/*+ * Scan a tag.+ */++static int+yaml_parser_scan_tag_uri(yaml_parser_t *parser, int directive,+ yaml_char_t *head, yaml_mark_t start_mark, yaml_char_t **uri)+{+ size_t length = head ? strlen((char *)head) : 0;+ yaml_string_t string = NULL_STRING;++ if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error;++ /* Resize the string to include the head. */++ while (string.end - string.start <= (int)length) {+ if (!yaml_string_extend(&string.start, &string.pointer, &string.end)) {+ parser->error = YAML_MEMORY_ERROR;+ goto error;+ }+ }++ /*+ * Copy the head if needed.+ *+ * Note that we don't copy the leading '!' character.+ */++ if (length > 1) {+ memcpy(string.start, head+1, length-1);+ string.pointer += length-1;+ }++ /* Scan the tag. */++ if (!CACHE(parser, 1)) goto error;++ /*+ * The set of characters that may appear in URI is as follows:+ *+ * '0'-'9', 'A'-'Z', 'a'-'z', '_', '-', ';', '/', '?', ':', '@', '&',+ * '=', '+', '$', ',', '.', '!', '~', '*', '\'', '(', ')', '[', ']',+ * '%'.+ */++ while (IS_ALPHA(parser->buffer) || CHECK(parser->buffer, ';')+ || CHECK(parser->buffer, '/') || CHECK(parser->buffer, '?')+ || CHECK(parser->buffer, ':') || CHECK(parser->buffer, '@')+ || CHECK(parser->buffer, '&') || CHECK(parser->buffer, '=')+ || CHECK(parser->buffer, '+') || CHECK(parser->buffer, '$')+ || CHECK(parser->buffer, ',') || CHECK(parser->buffer, '.')+ || CHECK(parser->buffer, '!') || CHECK(parser->buffer, '~')+ || CHECK(parser->buffer, '*') || CHECK(parser->buffer, '\'')+ || CHECK(parser->buffer, '(') || CHECK(parser->buffer, ')')+ || CHECK(parser->buffer, '[') || CHECK(parser->buffer, ']')+ || CHECK(parser->buffer, '%'))+ {+ /* Check if it is a URI-escape sequence. */++ if (CHECK(parser->buffer, '%')) {+ if (!yaml_parser_scan_uri_escapes(parser,+ directive, start_mark, &string)) goto error;+ }+ else {+ if (!READ(parser, string)) goto error;+ }++ length ++;+ if (!CACHE(parser, 1)) goto error;+ }++ /* Check if the tag is non-empty. */++ if (!length) {+ if (!STRING_EXTEND(parser, string))+ goto error;++ yaml_parser_set_scanner_error(parser, directive ?+ "while parsing a %TAG directive" : "while parsing a tag",+ start_mark, "did not find expected tag URI");+ goto error;+ }++ *uri = string.start;++ return 1;++error:+ STRING_DEL(parser, string);+ return 0;+}++/*+ * Decode an URI-escape sequence corresponding to a single UTF-8 character.+ */++static int+yaml_parser_scan_uri_escapes(yaml_parser_t *parser, int directive,+ yaml_mark_t start_mark, yaml_string_t *string)+{+ int width = 0;++ /* Decode the required number of characters. */++ do {++ unsigned char octet = 0;++ /* Check for a URI-escaped octet. */++ if (!CACHE(parser, 3)) return 0;++ if (!(CHECK(parser->buffer, '%')+ && IS_HEX_AT(parser->buffer, 1)+ && IS_HEX_AT(parser->buffer, 2))) {+ return yaml_parser_set_scanner_error(parser, directive ?+ "while parsing a %TAG directive" : "while parsing a tag",+ start_mark, "did not find URI escaped octet");+ }++ /* Get the octet. */++ octet = (AS_HEX_AT(parser->buffer, 1) << 4) + AS_HEX_AT(parser->buffer, 2);++ /* If it is the leading octet, determine the length of the UTF-8 sequence. */++ if (!width)+ {+ width = (octet & 0x80) == 0x00 ? 1 :+ (octet & 0xE0) == 0xC0 ? 2 :+ (octet & 0xF0) == 0xE0 ? 3 :+ (octet & 0xF8) == 0xF0 ? 4 : 0;+ if (!width) {+ return yaml_parser_set_scanner_error(parser, directive ?+ "while parsing a %TAG directive" : "while parsing a tag",+ start_mark, "found an incorrect leading UTF-8 octet");+ }+ }+ else+ {+ /* Check if the trailing octet is correct. */++ if ((octet & 0xC0) != 0x80) {+ return yaml_parser_set_scanner_error(parser, directive ?+ "while parsing a %TAG directive" : "while parsing a tag",+ start_mark, "found an incorrect trailing UTF-8 octet");+ }+ }++ /* Copy the octet and move the pointers. */++ *(string->pointer++) = octet;+ SKIP(parser);+ SKIP(parser);+ SKIP(parser);++ } while (--width);++ return 1;+}++/*+ * Scan a block scalar.+ */++static int+yaml_parser_scan_block_scalar(yaml_parser_t *parser, yaml_token_t *token,+ int literal)+{+ yaml_mark_t start_mark;+ yaml_mark_t end_mark;+ yaml_string_t string = NULL_STRING;+ yaml_string_t leading_break = NULL_STRING;+ yaml_string_t trailing_breaks = NULL_STRING;+ int chomping = 0;+ int increment = 0;+ int indent = 0;+ int leading_blank = 0;+ int trailing_blank = 0;++ if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error;+ if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error;+ if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error;++ /* Eat the indicator '|' or '>'. */++ start_mark = parser->mark;++ SKIP(parser);++ /* Scan the additional block scalar indicators. */++ if (!CACHE(parser, 1)) goto error;++ /* Check for a chomping indicator. */++ if (CHECK(parser->buffer, '+') || CHECK(parser->buffer, '-'))+ {+ /* Set the chomping method and eat the indicator. */++ chomping = CHECK(parser->buffer, '+') ? +1 : -1;++ SKIP(parser);++ /* Check for an indentation indicator. */++ if (!CACHE(parser, 1)) goto error;++ if (IS_DIGIT(parser->buffer))+ {+ /* Check that the intendation is greater than 0. */++ if (CHECK(parser->buffer, '0')) {+ yaml_parser_set_scanner_error(parser, "while scanning a block scalar",+ start_mark, "found an intendation indicator equal to 0");+ goto error;+ }++ /* Get the intendation level and eat the indicator. */++ increment = AS_DIGIT(parser->buffer);++ SKIP(parser);+ }+ }++ /* Do the same as above, but in the opposite order. */++ else if (IS_DIGIT(parser->buffer))+ {+ if (CHECK(parser->buffer, '0')) {+ yaml_parser_set_scanner_error(parser, "while scanning a block scalar",+ start_mark, "found an intendation indicator equal to 0");+ goto error;+ }++ increment = AS_DIGIT(parser->buffer);++ SKIP(parser);++ if (!CACHE(parser, 1)) goto error;++ if (CHECK(parser->buffer, '+') || CHECK(parser->buffer, '-')) {+ chomping = CHECK(parser->buffer, '+') ? +1 : -1;++ SKIP(parser);+ }+ }++ /* Eat whitespaces and comments to the end of the line. */++ if (!CACHE(parser, 1)) goto error;++ while (IS_BLANK(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) goto error;+ }++ if (CHECK(parser->buffer, '#')) {+ while (!IS_BREAKZ(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) goto error;+ }+ }++ /* Check if we are at the end of the line. */++ if (!IS_BREAKZ(parser->buffer)) {+ yaml_parser_set_scanner_error(parser, "while scanning a block scalar",+ start_mark, "did not find expected comment or line break");+ goto error;+ }++ /* Eat a line break. */++ if (IS_BREAK(parser->buffer)) {+ if (!CACHE(parser, 2)) goto error;+ SKIP_LINE(parser);+ }++ end_mark = parser->mark;++ /* Set the intendation level if it was specified. */++ if (increment) {+ indent = parser->indent >= 0 ? parser->indent+increment : increment;+ }++ /* Scan the leading line breaks and determine the indentation level if needed. */++ if (!yaml_parser_scan_block_scalar_breaks(parser, &indent, &trailing_breaks,+ start_mark, &end_mark)) goto error;++ /* Scan the block scalar content. */++ if (!CACHE(parser, 1)) goto error;++ while ((int)parser->mark.column == indent && !IS_Z(parser->buffer))+ {+ /*+ * We are at the beginning of a non-empty line.+ */++ /* Is it a trailing whitespace? */++ trailing_blank = IS_BLANK(parser->buffer);++ /* Check if we need to fold the leading line break. */++ if (!literal && (*leading_break.start == '\n')+ && !leading_blank && !trailing_blank)+ {+ /* Do we need to join the lines by space? */++ if (*trailing_breaks.start == '\0') {+ if (!STRING_EXTEND(parser, string)) goto error;+ *(string.pointer ++) = ' ';+ }++ CLEAR(parser, leading_break);+ }+ else {+ if (!JOIN(parser, string, leading_break)) goto error;+ CLEAR(parser, leading_break);+ }++ /* Append the remaining line breaks. */++ if (!JOIN(parser, string, trailing_breaks)) goto error;+ CLEAR(parser, trailing_breaks);++ /* Is it a leading whitespace? */++ leading_blank = IS_BLANK(parser->buffer);++ /* Consume the current line. */++ while (!IS_BREAKZ(parser->buffer)) {+ if (!READ(parser, string)) goto error;+ if (!CACHE(parser, 1)) goto error;+ }++ /* Consume the line break. */++ if (!CACHE(parser, 2)) goto error;++ if (!READ_LINE(parser, leading_break)) goto error;++ /* Eat the following intendation spaces and line breaks. */++ if (!yaml_parser_scan_block_scalar_breaks(parser,+ &indent, &trailing_breaks, start_mark, &end_mark)) goto error;+ }++ /* Chomp the tail. */++ if (chomping != -1) {+ if (!JOIN(parser, string, leading_break)) goto error;+ }+ if (chomping == 1) {+ if (!JOIN(parser, string, trailing_breaks)) goto error;+ }++ /* Create a token. */++ SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start,+ literal ? YAML_LITERAL_SCALAR_STYLE : YAML_FOLDED_SCALAR_STYLE,+ start_mark, end_mark);++ STRING_DEL(parser, leading_break);+ STRING_DEL(parser, trailing_breaks);++ return 1;++error:+ STRING_DEL(parser, string);+ STRING_DEL(parser, leading_break);+ STRING_DEL(parser, trailing_breaks);++ return 0;+}++/*+ * Scan intendation spaces and line breaks for a block scalar. Determine the+ * intendation level if needed.+ */++static int+yaml_parser_scan_block_scalar_breaks(yaml_parser_t *parser,+ int *indent, yaml_string_t *breaks,+ yaml_mark_t start_mark, yaml_mark_t *end_mark)+{+ int max_indent = 0;++ *end_mark = parser->mark;++ /* Eat the intendation spaces and line breaks. */++ while (1)+ {+ /* Eat the intendation spaces. */++ if (!CACHE(parser, 1)) return 0;++ while ((!*indent || (int)parser->mark.column < *indent)+ && IS_SPACE(parser->buffer)) {+ SKIP(parser);+ if (!CACHE(parser, 1)) return 0;+ }++ if ((int)parser->mark.column > max_indent)+ max_indent = (int)parser->mark.column;++ /* Check for a tab character messing the intendation. */++ if ((!*indent || (int)parser->mark.column < *indent)+ && IS_TAB(parser->buffer)) {+ return yaml_parser_set_scanner_error(parser, "while scanning a block scalar",+ start_mark, "found a tab character where an intendation space is expected");+ }++ /* Have we found a non-empty line? */++ if (!IS_BREAK(parser->buffer)) break;++ /* Consume the line break. */++ if (!CACHE(parser, 2)) return 0;+ if (!READ_LINE(parser, *breaks)) return 0;+ *end_mark = parser->mark;+ }++ /* Determine the indentation level if needed. */++ if (!*indent) {+ *indent = max_indent;+ if (*indent < parser->indent + 1)+ *indent = parser->indent + 1;+ if (*indent < 1)+ *indent = 1;+ }++ return 1; +}++/*+ * Scan a quoted scalar.+ */++static int+yaml_parser_scan_flow_scalar(yaml_parser_t *parser, yaml_token_t *token,+ int single)+{+ yaml_mark_t start_mark;+ yaml_mark_t end_mark;+ yaml_string_t string = NULL_STRING;+ yaml_string_t leading_break = NULL_STRING;+ yaml_string_t trailing_breaks = NULL_STRING;+ yaml_string_t whitespaces = NULL_STRING;+ int leading_blanks;++ if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error;+ if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error;+ if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error;+ if (!STRING_INIT(parser, whitespaces, INITIAL_STRING_SIZE)) goto error;++ /* Eat the left quote. */++ start_mark = parser->mark;++ SKIP(parser);++ /* Consume the content of the quoted scalar. */++ while (1)+ {+ /* Check that there are no document indicators at the beginning of the line. */++ if (!CACHE(parser, 4)) goto error;++ if (parser->mark.column == 0 &&+ ((CHECK_AT(parser->buffer, '-', 0) &&+ CHECK_AT(parser->buffer, '-', 1) &&+ CHECK_AT(parser->buffer, '-', 2)) ||+ (CHECK_AT(parser->buffer, '.', 0) &&+ CHECK_AT(parser->buffer, '.', 1) &&+ CHECK_AT(parser->buffer, '.', 2))) &&+ IS_BLANKZ_AT(parser->buffer, 3))+ {+ yaml_parser_set_scanner_error(parser, "while scanning a quoted scalar",+ start_mark, "found unexpected document indicator");+ goto error;+ }++ /* Check for EOF. */++ if (IS_Z(parser->buffer)) {+ yaml_parser_set_scanner_error(parser, "while scanning a quoted scalar",+ start_mark, "found unexpected end of stream");+ goto error;+ }++ /* Consume non-blank characters. */++ if (!CACHE(parser, 2)) goto error;++ leading_blanks = 0;++ while (!IS_BLANKZ(parser->buffer))+ {+ /* Check for an escaped single quote. */++ if (single && CHECK_AT(parser->buffer, '\'', 0)+ && CHECK_AT(parser->buffer, '\'', 1))+ {+ if (!STRING_EXTEND(parser, string)) goto error;+ *(string.pointer++) = '\'';+ SKIP(parser);+ SKIP(parser);+ }++ /* Check for the right quote. */++ else if (CHECK(parser->buffer, single ? '\'' : '"'))+ {+ break;+ }++ /* Check for an escaped line break. */++ else if (!single && CHECK(parser->buffer, '\\')+ && IS_BREAK_AT(parser->buffer, 1))+ {+ if (!CACHE(parser, 3)) goto error;+ SKIP(parser);+ SKIP_LINE(parser);+ leading_blanks = 1;+ break;+ }++ /* Check for an escape sequence. */++ else if (!single && CHECK(parser->buffer, '\\'))+ {+ size_t code_length = 0;++ if (!STRING_EXTEND(parser, string)) goto error;++ /* Check the escape character. */++ switch (parser->buffer.pointer[1])+ {+ case '0':+ *(string.pointer++) = '\0';+ break;++ case 'a':+ *(string.pointer++) = '\x07';+ break;++ case 'b':+ *(string.pointer++) = '\x08';+ break;++ case 't':+ case '\t':+ *(string.pointer++) = '\x09';+ break;++ case 'n':+ *(string.pointer++) = '\x0A';+ break;++ case 'v':+ *(string.pointer++) = '\x0B';+ break;++ case 'f':+ *(string.pointer++) = '\x0C';+ break;++ case 'r':+ *(string.pointer++) = '\x0D';+ break;++ case 'e':+ *(string.pointer++) = '\x1B';+ break;++ case ' ':+ *(string.pointer++) = '\x20';+ break;++ case '"':+ *(string.pointer++) = '"';+ break;++ case '\'':+ *(string.pointer++) = '\'';+ break;++ case '\\':+ *(string.pointer++) = '\\';+ break;++ case 'N': /* NEL (#x85) */+ *(string.pointer++) = '\xC2';+ *(string.pointer++) = '\x85';+ break;++ case '_': /* #xA0 */+ *(string.pointer++) = '\xC2';+ *(string.pointer++) = '\xA0';+ break;++ case 'L': /* LS (#x2028) */+ *(string.pointer++) = '\xE2';+ *(string.pointer++) = '\x80';+ *(string.pointer++) = '\xA8';+ break;++ case 'P': /* PS (#x2029) */+ *(string.pointer++) = '\xE2';+ *(string.pointer++) = '\x80';+ *(string.pointer++) = '\xA9';+ break;++ case 'x':+ code_length = 2;+ break;++ case 'u':+ code_length = 4;+ break;++ case 'U':+ code_length = 8;+ break;++ default:+ yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar",+ start_mark, "found unknown escape character");+ goto error;+ }++ SKIP(parser);+ SKIP(parser);++ /* Consume an arbitrary escape code. */++ if (code_length)+ {+ unsigned int value = 0;+ size_t k;++ /* Scan the character value. */++ if (!CACHE(parser, code_length)) goto error;++ for (k = 0; k < code_length; k ++) {+ if (!IS_HEX_AT(parser->buffer, k)) {+ yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar",+ start_mark, "did not find expected hexdecimal number");+ goto error;+ }+ value = (value << 4) + AS_HEX_AT(parser->buffer, k);+ }++ /* Check the value and write the character. */++ if ((value >= 0xD800 && value <= 0xDFFF) || value > 0x10FFFF) {+ yaml_parser_set_scanner_error(parser, "while parsing a quoted scalar",+ start_mark, "found invalid Unicode character escape code");+ goto error;+ }++ if (value <= 0x7F) {+ *(string.pointer++) = value;+ }+ else if (value <= 0x7FF) {+ *(string.pointer++) = 0xC0 + (value >> 6);+ *(string.pointer++) = 0x80 + (value & 0x3F);+ }+ else if (value <= 0xFFFF) {+ *(string.pointer++) = 0xE0 + (value >> 12);+ *(string.pointer++) = 0x80 + ((value >> 6) & 0x3F);+ *(string.pointer++) = 0x80 + (value & 0x3F);+ }+ else {+ *(string.pointer++) = 0xF0 + (value >> 18);+ *(string.pointer++) = 0x80 + ((value >> 12) & 0x3F);+ *(string.pointer++) = 0x80 + ((value >> 6) & 0x3F);+ *(string.pointer++) = 0x80 + (value & 0x3F);+ }++ /* Advance the pointer. */++ for (k = 0; k < code_length; k ++) {+ SKIP(parser);+ }+ }+ }++ else+ {+ /* It is a non-escaped non-blank character. */++ if (!READ(parser, string)) goto error;+ }++ if (!CACHE(parser, 2)) goto error;+ }++ /* Check if we are at the end of the scalar. */++ if (CHECK(parser->buffer, single ? '\'' : '"'))+ break;++ /* Consume blank characters. */++ if (!CACHE(parser, 1)) goto error;++ while (IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer))+ {+ if (IS_BLANK(parser->buffer))+ {+ /* Consume a space or a tab character. */++ if (!leading_blanks) {+ if (!READ(parser, whitespaces)) goto error;+ }+ else {+ SKIP(parser);+ }+ }+ else+ {+ if (!CACHE(parser, 2)) goto error;++ /* Check if it is a first line break. */++ if (!leading_blanks)+ {+ CLEAR(parser, whitespaces);+ if (!READ_LINE(parser, leading_break)) goto error;+ leading_blanks = 1;+ }+ else+ {+ if (!READ_LINE(parser, trailing_breaks)) goto error;+ }+ }+ if (!CACHE(parser, 1)) goto error;+ }++ /* Join the whitespaces or fold line breaks. */++ if (leading_blanks)+ {+ /* Do we need to fold line breaks? */++ if (leading_break.start[0] == '\n') {+ if (trailing_breaks.start[0] == '\0') {+ if (!STRING_EXTEND(parser, string)) goto error;+ *(string.pointer++) = ' ';+ }+ else {+ if (!JOIN(parser, string, trailing_breaks)) goto error;+ CLEAR(parser, trailing_breaks);+ }+ CLEAR(parser, leading_break);+ }+ else {+ if (!JOIN(parser, string, leading_break)) goto error;+ if (!JOIN(parser, string, trailing_breaks)) goto error;+ CLEAR(parser, leading_break);+ CLEAR(parser, trailing_breaks);+ }+ }+ else+ {+ if (!JOIN(parser, string, whitespaces)) goto error;+ CLEAR(parser, whitespaces);+ }+ }++ /* Eat the right quote. */++ SKIP(parser);++ end_mark = parser->mark;++ /* Create a token. */++ SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start,+ single ? YAML_SINGLE_QUOTED_SCALAR_STYLE : YAML_DOUBLE_QUOTED_SCALAR_STYLE,+ start_mark, end_mark);++ STRING_DEL(parser, leading_break);+ STRING_DEL(parser, trailing_breaks);+ STRING_DEL(parser, whitespaces);++ return 1;++error:+ STRING_DEL(parser, string);+ STRING_DEL(parser, leading_break);+ STRING_DEL(parser, trailing_breaks);+ STRING_DEL(parser, whitespaces);++ return 0;+}++/*+ * Scan a plain scalar.+ */++static int+yaml_parser_scan_plain_scalar(yaml_parser_t *parser, yaml_token_t *token)+{+ yaml_mark_t start_mark;+ yaml_mark_t end_mark;+ yaml_string_t string = NULL_STRING;+ yaml_string_t leading_break = NULL_STRING;+ yaml_string_t trailing_breaks = NULL_STRING;+ yaml_string_t whitespaces = NULL_STRING;+ int leading_blanks = 0;+ int indent = parser->indent+1;++ if (!STRING_INIT(parser, string, INITIAL_STRING_SIZE)) goto error;+ if (!STRING_INIT(parser, leading_break, INITIAL_STRING_SIZE)) goto error;+ if (!STRING_INIT(parser, trailing_breaks, INITIAL_STRING_SIZE)) goto error;+ if (!STRING_INIT(parser, whitespaces, INITIAL_STRING_SIZE)) goto error;++ start_mark = end_mark = parser->mark;++ /* Consume the content of the plain scalar. */++ while (1)+ {+ /* Check for a document indicator. */++ if (!CACHE(parser, 4)) goto error;++ if (parser->mark.column == 0 &&+ ((CHECK_AT(parser->buffer, '-', 0) &&+ CHECK_AT(parser->buffer, '-', 1) &&+ CHECK_AT(parser->buffer, '-', 2)) ||+ (CHECK_AT(parser->buffer, '.', 0) &&+ CHECK_AT(parser->buffer, '.', 1) &&+ CHECK_AT(parser->buffer, '.', 2))) &&+ IS_BLANKZ_AT(parser->buffer, 3)) break;++ /* Check for a comment. */++ if (CHECK(parser->buffer, '#'))+ break;++ /* Consume non-blank characters. */++ while (!IS_BLANKZ(parser->buffer))+ {+ /* Check for 'x:x' in the flow context. TODO: Fix the test "spec-08-13". */++ if (parser->flow_level+ && CHECK(parser->buffer, ':')+ && !IS_BLANKZ_AT(parser->buffer, 1)) {+ yaml_parser_set_scanner_error(parser, "while scanning a plain scalar",+ start_mark, "found unexpected ':'");+ goto error;+ }++ /* Check for indicators that may end a plain scalar. */++ if ((CHECK(parser->buffer, ':') && IS_BLANKZ_AT(parser->buffer, 1))+ || (parser->flow_level &&+ (CHECK(parser->buffer, ',') || CHECK(parser->buffer, ':')+ || CHECK(parser->buffer, '?') || CHECK(parser->buffer, '[')+ || CHECK(parser->buffer, ']') || CHECK(parser->buffer, '{')+ || CHECK(parser->buffer, '}'))))+ break;++ /* Check if we need to join whitespaces and breaks. */++ if (leading_blanks || whitespaces.start != whitespaces.pointer)+ {+ if (leading_blanks)+ {+ /* Do we need to fold line breaks? */++ if (leading_break.start[0] == '\n') {+ if (trailing_breaks.start[0] == '\0') {+ if (!STRING_EXTEND(parser, string)) goto error;+ *(string.pointer++) = ' ';+ }+ else {+ if (!JOIN(parser, string, trailing_breaks)) goto error;+ CLEAR(parser, trailing_breaks);+ }+ CLEAR(parser, leading_break);+ }+ else {+ if (!JOIN(parser, string, leading_break)) goto error;+ if (!JOIN(parser, string, trailing_breaks)) goto error;+ CLEAR(parser, leading_break);+ CLEAR(parser, trailing_breaks);+ }++ leading_blanks = 0;+ }+ else+ {+ if (!JOIN(parser, string, whitespaces)) goto error;+ CLEAR(parser, whitespaces);+ }+ }++ /* Copy the character. */++ if (!READ(parser, string)) goto error;++ end_mark = parser->mark;++ if (!CACHE(parser, 2)) goto error;+ }++ /* Is it the end? */++ if (!(IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer)))+ break;++ /* Consume blank characters. */++ if (!CACHE(parser, 1)) goto error;++ while (IS_BLANK(parser->buffer) || IS_BREAK(parser->buffer))+ {+ if (IS_BLANK(parser->buffer))+ {+ /* Check for tab character that abuse intendation. */++ if (leading_blanks && (int)parser->mark.column < indent+ && IS_TAB(parser->buffer)) {+ yaml_parser_set_scanner_error(parser, "while scanning a plain scalar",+ start_mark, "found a tab character that violate intendation");+ goto error;+ }++ /* Consume a space or a tab character. */++ if (!leading_blanks) {+ if (!READ(parser, whitespaces)) goto error;+ }+ else {+ SKIP(parser);+ }+ }+ else+ {+ if (!CACHE(parser, 2)) goto error;++ /* Check if it is a first line break. */++ if (!leading_blanks)+ {+ CLEAR(parser, whitespaces);+ if (!READ_LINE(parser, leading_break)) goto error;+ leading_blanks = 1;+ }+ else+ {+ if (!READ_LINE(parser, trailing_breaks)) goto error;+ }+ }+ if (!CACHE(parser, 1)) goto error;+ }++ /* Check intendation level. */++ if (!parser->flow_level && (int)parser->mark.column < indent)+ break;+ }++ /* Create a token. */++ SCALAR_TOKEN_INIT(*token, string.start, string.pointer-string.start,+ YAML_PLAIN_SCALAR_STYLE, start_mark, end_mark);++ /* Note that we change the 'simple_key_allowed' flag. */++ if (leading_blanks) {+ parser->simple_key_allowed = 1;+ }++ STRING_DEL(parser, leading_break);+ STRING_DEL(parser, trailing_breaks);+ STRING_DEL(parser, whitespaces);++ return 1;++error:+ STRING_DEL(parser, string);+ STRING_DEL(parser, leading_break);+ STRING_DEL(parser, trailing_breaks);+ STRING_DEL(parser, whitespaces);++ return 0;+}+
libyaml/writer.c view
@@ -1,141 +1,141 @@- -#include "yaml_private.h" - -/* - * Declarations. - */ - -static int -yaml_emitter_set_writer_error(yaml_emitter_t *emitter, const char *problem); - -YAML_DECLARE(int) -yaml_emitter_flush(yaml_emitter_t *emitter); - -/* - * Set the writer error and return 0. - */ - -static int -yaml_emitter_set_writer_error(yaml_emitter_t *emitter, const char *problem) -{ - emitter->error = YAML_WRITER_ERROR; - emitter->problem = problem; - - return 0; -} - -/* - * Flush the output buffer. - */ - -YAML_DECLARE(int) -yaml_emitter_flush(yaml_emitter_t *emitter) -{ - int low, high; - - assert(emitter); /* Non-NULL emitter object is expected. */ - assert(emitter->write_handler); /* Write handler must be set. */ - assert(emitter->encoding); /* Output encoding must be set. */ - - emitter->buffer.last = emitter->buffer.pointer; - emitter->buffer.pointer = emitter->buffer.start; - - /* Check if the buffer is empty. */ - - if (emitter->buffer.start == emitter->buffer.last) { - return 1; - } - - /* If the output encoding is UTF-8, we don't need to recode the buffer. */ - - if (emitter->encoding == YAML_UTF8_ENCODING) - { - if (emitter->write_handler(emitter->write_handler_data, - emitter->buffer.start, - emitter->buffer.last - emitter->buffer.start)) { - emitter->buffer.last = emitter->buffer.start; - emitter->buffer.pointer = emitter->buffer.start; - return 1; - } - else { - return yaml_emitter_set_writer_error(emitter, "Write error"); - } - } - - /* Recode the buffer into the raw buffer. */ - - low = (emitter->encoding == YAML_UTF16LE_ENCODING ? 0 : 1); - high = (emitter->encoding == YAML_UTF16LE_ENCODING ? 1 : 0); - - while (emitter->buffer.pointer != emitter->buffer.last) - { - unsigned char octet; - unsigned int width; - unsigned int value; - size_t k; - - /* - * See the "reader.c" code for more details on UTF-8 encoding. Note - * that we assume that the buffer contains a valid UTF-8 sequence. - */ - - /* Read the next UTF-8 character. */ - - octet = emitter->buffer.pointer[0]; - - width = (octet & 0x80) == 0x00 ? 1 : - (octet & 0xE0) == 0xC0 ? 2 : - (octet & 0xF0) == 0xE0 ? 3 : - (octet & 0xF8) == 0xF0 ? 4 : 0; - - value = (octet & 0x80) == 0x00 ? octet & 0x7F : - (octet & 0xE0) == 0xC0 ? octet & 0x1F : - (octet & 0xF0) == 0xE0 ? octet & 0x0F : - (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0; - - for (k = 1; k < width; k ++) { - octet = emitter->buffer.pointer[k]; - value = (value << 6) + (octet & 0x3F); - } - - emitter->buffer.pointer += width; - - /* Write the character. */ - - if (value < 0x10000) - { - emitter->raw_buffer.last[high] = value >> 8; - emitter->raw_buffer.last[low] = value & 0xFF; - - emitter->raw_buffer.last += 2; - } - else - { - /* Write the character using a surrogate pair (check "reader.c"). */ - - value -= 0x10000; - emitter->raw_buffer.last[high] = 0xD8 + (value >> 18); - emitter->raw_buffer.last[low] = (value >> 10) & 0xFF; - emitter->raw_buffer.last[high+2] = 0xDC + ((value >> 8) & 0xFF); - emitter->raw_buffer.last[low+2] = value & 0xFF; - - emitter->raw_buffer.last += 4; - } - } - - /* Write the raw buffer. */ - - if (emitter->write_handler(emitter->write_handler_data, - emitter->raw_buffer.start, - emitter->raw_buffer.last - emitter->raw_buffer.start)) { - emitter->buffer.last = emitter->buffer.start; - emitter->buffer.pointer = emitter->buffer.start; - emitter->raw_buffer.last = emitter->raw_buffer.start; - emitter->raw_buffer.pointer = emitter->raw_buffer.start; - return 1; - } - else { - return yaml_emitter_set_writer_error(emitter, "Write error"); - } -} - ++#include "yaml_private.h"++/*+ * Declarations.+ */++static int+yaml_emitter_set_writer_error(yaml_emitter_t *emitter, const char *problem);++YAML_DECLARE(int)+yaml_emitter_flush(yaml_emitter_t *emitter);++/*+ * Set the writer error and return 0.+ */++static int+yaml_emitter_set_writer_error(yaml_emitter_t *emitter, const char *problem)+{+ emitter->error = YAML_WRITER_ERROR;+ emitter->problem = problem;++ return 0;+}++/*+ * Flush the output buffer.+ */++YAML_DECLARE(int)+yaml_emitter_flush(yaml_emitter_t *emitter)+{+ int low, high;++ assert(emitter); /* Non-NULL emitter object is expected. */+ assert(emitter->write_handler); /* Write handler must be set. */+ assert(emitter->encoding); /* Output encoding must be set. */++ emitter->buffer.last = emitter->buffer.pointer;+ emitter->buffer.pointer = emitter->buffer.start;++ /* Check if the buffer is empty. */++ if (emitter->buffer.start == emitter->buffer.last) {+ return 1;+ }++ /* If the output encoding is UTF-8, we don't need to recode the buffer. */++ if (emitter->encoding == YAML_UTF8_ENCODING)+ {+ if (emitter->write_handler(emitter->write_handler_data,+ emitter->buffer.start,+ emitter->buffer.last - emitter->buffer.start)) {+ emitter->buffer.last = emitter->buffer.start;+ emitter->buffer.pointer = emitter->buffer.start;+ return 1;+ }+ else {+ return yaml_emitter_set_writer_error(emitter, "Write error");+ }+ }++ /* Recode the buffer into the raw buffer. */++ low = (emitter->encoding == YAML_UTF16LE_ENCODING ? 0 : 1);+ high = (emitter->encoding == YAML_UTF16LE_ENCODING ? 1 : 0);++ while (emitter->buffer.pointer != emitter->buffer.last)+ {+ unsigned char octet;+ unsigned int width;+ unsigned int value;+ size_t k;++ /* + * See the "reader.c" code for more details on UTF-8 encoding. Note+ * that we assume that the buffer contains a valid UTF-8 sequence.+ */++ /* Read the next UTF-8 character. */++ octet = emitter->buffer.pointer[0];++ width = (octet & 0x80) == 0x00 ? 1 :+ (octet & 0xE0) == 0xC0 ? 2 :+ (octet & 0xF0) == 0xE0 ? 3 :+ (octet & 0xF8) == 0xF0 ? 4 : 0;++ value = (octet & 0x80) == 0x00 ? octet & 0x7F :+ (octet & 0xE0) == 0xC0 ? octet & 0x1F :+ (octet & 0xF0) == 0xE0 ? octet & 0x0F :+ (octet & 0xF8) == 0xF0 ? octet & 0x07 : 0;++ for (k = 1; k < width; k ++) {+ octet = emitter->buffer.pointer[k];+ value = (value << 6) + (octet & 0x3F);+ }++ emitter->buffer.pointer += width;++ /* Write the character. */++ if (value < 0x10000)+ {+ emitter->raw_buffer.last[high] = value >> 8;+ emitter->raw_buffer.last[low] = value & 0xFF;++ emitter->raw_buffer.last += 2;+ }+ else+ {+ /* Write the character using a surrogate pair (check "reader.c"). */++ value -= 0x10000;+ emitter->raw_buffer.last[high] = 0xD8 + (value >> 18);+ emitter->raw_buffer.last[low] = (value >> 10) & 0xFF;+ emitter->raw_buffer.last[high+2] = 0xDC + ((value >> 8) & 0xFF);+ emitter->raw_buffer.last[low+2] = value & 0xFF;++ emitter->raw_buffer.last += 4;+ }+ }++ /* Write the raw buffer. */++ if (emitter->write_handler(emitter->write_handler_data,+ emitter->raw_buffer.start,+ emitter->raw_buffer.last - emitter->raw_buffer.start)) {+ emitter->buffer.last = emitter->buffer.start;+ emitter->buffer.pointer = emitter->buffer.start;+ emitter->raw_buffer.last = emitter->raw_buffer.start;+ emitter->raw_buffer.pointer = emitter->raw_buffer.start;+ return 1;+ }+ else {+ return yaml_emitter_set_writer_error(emitter, "Write error");+ }+}+
libyaml/yaml.h view
@@ -1,1973 +1,1973 @@-/** - * @file yaml.h - * @brief Public interface for libyaml. - * - * Include the header file with the code: - * @code - * #include <yaml.h> - * @endcode - */ - -#ifndef YAML_H -#define YAML_H - -#ifdef __cplusplus -extern "C" { -#endif - -#include <stdlib.h> -#include <stdio.h> -#include <string.h> - -/** - * @defgroup export Export Definitions - * @{ - */ - -/** The public API declaration. */ - -#define YAML_DECLARE_STATIC - -#ifdef WIN32 -# if defined(YAML_DECLARE_STATIC) -# define YAML_DECLARE(type) type -# elif defined(YAML_DECLARE_EXPORT) -# define YAML_DECLARE(type) __declspec(dllexport) type -# else -# define YAML_DECLARE(type) __declspec(dllimport) type -# endif -#else -# define YAML_DECLARE(type) type -#endif - -/** @} */ - -/** - * @defgroup version Version Information - * @{ - */ - -/** - * Get the library version as a string. - * - * @returns The function returns the pointer to a static string of the form - * @c "X.Y.Z", where @c X is the major version number, @c Y is a minor version - * number, and @c Z is the patch version number. - */ - -YAML_DECLARE(const char *) -yaml_get_version_string(void); - -/** - * Get the library version numbers. - * - * @param[out] major Major version number. - * @param[out] minor Minor version number. - * @param[out] patch Patch version number. - */ - -YAML_DECLARE(void) -yaml_get_version(int *major, int *minor, int *patch); - -/** @} */ - -/** - * @defgroup basic Basic Types - * @{ - */ - -/** The character type (UTF-8 octet). */ -typedef unsigned char yaml_char_t; - -/** The version directive data. */ -typedef struct yaml_version_directive_s { - /** The major version number. */ - int major; - /** The minor version number. */ - int minor; -} yaml_version_directive_t; - -/** The tag directive data. */ -typedef struct yaml_tag_directive_s { - /** The tag handle. */ - yaml_char_t *handle; - /** The tag prefix. */ - yaml_char_t *prefix; -} yaml_tag_directive_t; - -/** The stream encoding. */ -typedef enum yaml_encoding_e { - /** Let the parser choose the encoding. */ - YAML_ANY_ENCODING, - /** The default UTF-8 encoding. */ - YAML_UTF8_ENCODING, - /** The UTF-16-LE encoding with BOM. */ - YAML_UTF16LE_ENCODING, - /** The UTF-16-BE encoding with BOM. */ - YAML_UTF16BE_ENCODING -} yaml_encoding_t; - -/** Line break types. */ - -typedef enum yaml_break_e { - /** Let the parser choose the break type. */ - YAML_ANY_BREAK, - /** Use CR for line breaks (Mac style). */ - YAML_CR_BREAK, - /** Use LN for line breaks (Unix style). */ - YAML_LN_BREAK, - /** Use CR LN for line breaks (DOS style). */ - YAML_CRLN_BREAK -} yaml_break_t; - -/** Many bad things could happen with the parser and emitter. */ -typedef enum yaml_error_type_e { - /** No error is produced. */ - YAML_NO_ERROR, - - /** Cannot allocate or reallocate a block of memory. */ - YAML_MEMORY_ERROR, - - /** Cannot read or decode the input stream. */ - YAML_READER_ERROR, - /** Cannot scan the input stream. */ - YAML_SCANNER_ERROR, - /** Cannot parse the input stream. */ - YAML_PARSER_ERROR, - /** Cannot compose a YAML document. */ - YAML_COMPOSER_ERROR, - - /** Cannot write to the output stream. */ - YAML_WRITER_ERROR, - /** Cannot emit a YAML stream. */ - YAML_EMITTER_ERROR -} yaml_error_type_t; - -/** The pointer position. */ -typedef struct yaml_mark_s { - /** The position index. */ - size_t index; - - /** The position line. */ - size_t line; - - /** The position column. */ - size_t column; -} yaml_mark_t; - -/** @} */ - -/** - * @defgroup styles Node Styles - * @{ - */ - -/** Scalar styles. */ -typedef enum yaml_scalar_style_e { - /** Let the emitter choose the style. */ - YAML_ANY_SCALAR_STYLE, - - /** The plain scalar style. */ - YAML_PLAIN_SCALAR_STYLE, - - /** The single-quoted scalar style. */ - YAML_SINGLE_QUOTED_SCALAR_STYLE, - /** The double-quoted scalar style. */ - YAML_DOUBLE_QUOTED_SCALAR_STYLE, - - /** The literal scalar style. */ - YAML_LITERAL_SCALAR_STYLE, - /** The folded scalar style. */ - YAML_FOLDED_SCALAR_STYLE -} yaml_scalar_style_t; - -/** Sequence styles. */ -typedef enum yaml_sequence_style_e { - /** Let the emitter choose the style. */ - YAML_ANY_SEQUENCE_STYLE, - - /** The block sequence style. */ - YAML_BLOCK_SEQUENCE_STYLE, - /** The flow sequence style. */ - YAML_FLOW_SEQUENCE_STYLE -} yaml_sequence_style_t; - -/** Mapping styles. */ -typedef enum yaml_mapping_style_e { - /** Let the emitter choose the style. */ - YAML_ANY_MAPPING_STYLE, - - /** The block mapping style. */ - YAML_BLOCK_MAPPING_STYLE, - /** The flow mapping style. */ - YAML_FLOW_MAPPING_STYLE -/* YAML_FLOW_SET_MAPPING_STYLE */ -} yaml_mapping_style_t; - -/** @} */ - -/** - * @defgroup tokens Tokens - * @{ - */ - -/** Token types. */ -typedef enum yaml_token_type_e { - /** An empty token. */ - YAML_NO_TOKEN, - - /** A STREAM-START token. */ - YAML_STREAM_START_TOKEN, - /** A STREAM-END token. */ - YAML_STREAM_END_TOKEN, - - /** A VERSION-DIRECTIVE token. */ - YAML_VERSION_DIRECTIVE_TOKEN, - /** A TAG-DIRECTIVE token. */ - YAML_TAG_DIRECTIVE_TOKEN, - /** A DOCUMENT-START token. */ - YAML_DOCUMENT_START_TOKEN, - /** A DOCUMENT-END token. */ - YAML_DOCUMENT_END_TOKEN, - - /** A BLOCK-SEQUENCE-START token. */ - YAML_BLOCK_SEQUENCE_START_TOKEN, - /** A BLOCK-SEQUENCE-END token. */ - YAML_BLOCK_MAPPING_START_TOKEN, - /** A BLOCK-END token. */ - YAML_BLOCK_END_TOKEN, - - /** A FLOW-SEQUENCE-START token. */ - YAML_FLOW_SEQUENCE_START_TOKEN, - /** A FLOW-SEQUENCE-END token. */ - YAML_FLOW_SEQUENCE_END_TOKEN, - /** A FLOW-MAPPING-START token. */ - YAML_FLOW_MAPPING_START_TOKEN, - /** A FLOW-MAPPING-END token. */ - YAML_FLOW_MAPPING_END_TOKEN, - - /** A BLOCK-ENTRY token. */ - YAML_BLOCK_ENTRY_TOKEN, - /** A FLOW-ENTRY token. */ - YAML_FLOW_ENTRY_TOKEN, - /** A KEY token. */ - YAML_KEY_TOKEN, - /** A VALUE token. */ - YAML_VALUE_TOKEN, - - /** An ALIAS token. */ - YAML_ALIAS_TOKEN, - /** An ANCHOR token. */ - YAML_ANCHOR_TOKEN, - /** A TAG token. */ - YAML_TAG_TOKEN, - /** A SCALAR token. */ - YAML_SCALAR_TOKEN -} yaml_token_type_t; - -/** The token structure. */ -typedef struct yaml_token_s { - - /** The token type. */ - yaml_token_type_t type; - - /** The token data. */ - union { - - /** The stream start (for @c YAML_STREAM_START_TOKEN). */ - struct { - /** The stream encoding. */ - yaml_encoding_t encoding; - } stream_start; - - /** The alias (for @c YAML_ALIAS_TOKEN). */ - struct { - /** The alias value. */ - yaml_char_t *value; - } alias; - - /** The anchor (for @c YAML_ANCHOR_TOKEN). */ - struct { - /** The anchor value. */ - yaml_char_t *value; - } anchor; - - /** The tag (for @c YAML_TAG_TOKEN). */ - struct { - /** The tag handle. */ - yaml_char_t *handle; - /** The tag suffix. */ - yaml_char_t *suffix; - } tag; - - /** The scalar value (for @c YAML_SCALAR_TOKEN). */ - struct { - /** The scalar value. */ - yaml_char_t *value; - /** The length of the scalar value. */ - size_t length; - /** The scalar style. */ - yaml_scalar_style_t style; - } scalar; - - /** The version directive (for @c YAML_VERSION_DIRECTIVE_TOKEN). */ - struct { - /** The major version number. */ - int major; - /** The minor version number. */ - int minor; - } version_directive; - - /** The tag directive (for @c YAML_TAG_DIRECTIVE_TOKEN). */ - struct { - /** The tag handle. */ - yaml_char_t *handle; - /** The tag prefix. */ - yaml_char_t *prefix; - } tag_directive; - - } data; - - /** The beginning of the token. */ - yaml_mark_t start_mark; - /** The end of the token. */ - yaml_mark_t end_mark; - -} yaml_token_t; - -/** - * Free any memory allocated for a token object. - * - * @param[in,out] token A token object. - */ - -YAML_DECLARE(void) -yaml_token_delete(yaml_token_t *token); - -/** @} */ - -/** - * @defgroup events Events - * @{ - */ - -/** Event types. */ -typedef enum yaml_event_type_e { - /** An empty event. */ - YAML_NO_EVENT, - - /** A STREAM-START event. */ - YAML_STREAM_START_EVENT, - /** A STREAM-END event. */ - YAML_STREAM_END_EVENT, - - /** A DOCUMENT-START event. */ - YAML_DOCUMENT_START_EVENT, - /** A DOCUMENT-END event. */ - YAML_DOCUMENT_END_EVENT, - - /** An ALIAS event. */ - YAML_ALIAS_EVENT, - /** A SCALAR event. */ - YAML_SCALAR_EVENT, - - /** A SEQUENCE-START event. */ - YAML_SEQUENCE_START_EVENT, - /** A SEQUENCE-END event. */ - YAML_SEQUENCE_END_EVENT, - - /** A MAPPING-START event. */ - YAML_MAPPING_START_EVENT, - /** A MAPPING-END event. */ - YAML_MAPPING_END_EVENT -} yaml_event_type_t; - -/** The event structure. */ -typedef struct yaml_event_s { - - /** The event type. */ - yaml_event_type_t type; - - /** The event data. */ - union { - - /** The stream parameters (for @c YAML_STREAM_START_EVENT). */ - struct { - /** The document encoding. */ - yaml_encoding_t encoding; - } stream_start; - - /** The document parameters (for @c YAML_DOCUMENT_START_EVENT). */ - struct { - /** The version directive. */ - yaml_version_directive_t *version_directive; - - /** The list of tag directives. */ - struct { - /** The beginning of the tag directives list. */ - yaml_tag_directive_t *start; - /** The end of the tag directives list. */ - yaml_tag_directive_t *end; - } tag_directives; - - /** Is the document indicator implicit? */ - int implicit; - } document_start; - - /** The document end parameters (for @c YAML_DOCUMENT_END_EVENT). */ - struct { - /** Is the document end indicator implicit? */ - int implicit; - } document_end; - - /** The alias parameters (for @c YAML_ALIAS_EVENT). */ - struct { - /** The anchor. */ - yaml_char_t *anchor; - } alias; - - /** The scalar parameters (for @c YAML_SCALAR_EVENT). */ - struct { - /** The anchor. */ - yaml_char_t *anchor; - /** The tag. */ - yaml_char_t *tag; - /** The scalar value. */ - yaml_char_t *value; - /** The length of the scalar value. */ - size_t length; - /** Is the tag optional for the plain style? */ - int plain_implicit; - /** Is the tag optional for any non-plain style? */ - int quoted_implicit; - /** The scalar style. */ - yaml_scalar_style_t style; - } scalar; - - /** The sequence parameters (for @c YAML_SEQUENCE_START_EVENT). */ - struct { - /** The anchor. */ - yaml_char_t *anchor; - /** The tag. */ - yaml_char_t *tag; - /** Is the tag optional? */ - int implicit; - /** The sequence style. */ - yaml_sequence_style_t style; - } sequence_start; - - /** The mapping parameters (for @c YAML_MAPPING_START_EVENT). */ - struct { - /** The anchor. */ - yaml_char_t *anchor; - /** The tag. */ - yaml_char_t *tag; - /** Is the tag optional? */ - int implicit; - /** The mapping style. */ - yaml_mapping_style_t style; - } mapping_start; - - } data; - - /** The beginning of the event. */ - yaml_mark_t start_mark; - /** The end of the event. */ - yaml_mark_t end_mark; - -} yaml_event_t; - -/** - * Create the STREAM-START event. - * - * @param[out] event An empty event object. - * @param[in] encoding The stream encoding. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_stream_start_event_initialize(yaml_event_t *event, - yaml_encoding_t encoding); - -/** - * Create the STREAM-END event. - * - * @param[out] event An empty event object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_stream_end_event_initialize(yaml_event_t *event); - -/** - * Create the DOCUMENT-START event. - * - * The @a implicit argument is considered as a stylistic parameter and may be - * ignored by the emitter. - * - * @param[out] event An empty event object. - * @param[in] version_directive The %YAML directive value or - * @c NULL. - * @param[in] tag_directives_start The beginning of the %TAG - * directives list. - * @param[in] tag_directives_end The end of the %TAG directives - * list. - * @param[in] implicit If the document start indicator is - * implicit. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_document_start_event_initialize(yaml_event_t *event, - yaml_version_directive_t *version_directive, - yaml_tag_directive_t *tag_directives_start, - yaml_tag_directive_t *tag_directives_end, - int implicit); - -/** - * Create the DOCUMENT-END event. - * - * The @a implicit argument is considered as a stylistic parameter and may be - * ignored by the emitter. - * - * @param[out] event An empty event object. - * @param[in] implicit If the document end indicator is implicit. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_document_end_event_initialize(yaml_event_t *event, int implicit); - -/** - * Create an ALIAS event. - * - * @param[out] event An empty event object. - * @param[in] anchor The anchor value. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_alias_event_initialize(yaml_event_t *event, yaml_char_t *anchor); - -/** - * Create a SCALAR event. - * - * The @a style argument may be ignored by the emitter. - * - * Either the @a tag attribute or one of the @a plain_implicit and - * @a quoted_implicit flags must be set. - * - * @param[out] event An empty event object. - * @param[in] anchor The scalar anchor or @c NULL. - * @param[in] tag The scalar tag or @c NULL. - * @param[in] value The scalar value. - * @param[in] length The length of the scalar value. - * @param[in] plain_implicit If the tag may be omitted for the plain - * style. - * @param[in] quoted_implicit If the tag may be omitted for any - * non-plain style. - * @param[in] style The scalar style. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_scalar_event_initialize(yaml_event_t *event, - yaml_char_t *anchor, yaml_char_t *tag, - yaml_char_t *value, int length, - int plain_implicit, int quoted_implicit, - yaml_scalar_style_t style); - -/** - * Create a SEQUENCE-START event. - * - * The @a style argument may be ignored by the emitter. - * - * Either the @a tag attribute or the @a implicit flag must be set. - * - * @param[out] event An empty event object. - * @param[in] anchor The sequence anchor or @c NULL. - * @param[in] tag The sequence tag or @c NULL. - * @param[in] implicit If the tag may be omitted. - * @param[in] style The sequence style. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_sequence_start_event_initialize(yaml_event_t *event, - yaml_char_t *anchor, yaml_char_t *tag, int implicit, - yaml_sequence_style_t style); - -/** - * Create a SEQUENCE-END event. - * - * @param[out] event An empty event object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_sequence_end_event_initialize(yaml_event_t *event); - -/** - * Create a MAPPING-START event. - * - * The @a style argument may be ignored by the emitter. - * - * Either the @a tag attribute or the @a implicit flag must be set. - * - * @param[out] event An empty event object. - * @param[in] anchor The mapping anchor or @c NULL. - * @param[in] tag The mapping tag or @c NULL. - * @param[in] implicit If the tag may be omitted. - * @param[in] style The mapping style. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_mapping_start_event_initialize(yaml_event_t *event, - yaml_char_t *anchor, yaml_char_t *tag, int implicit, - yaml_mapping_style_t style); - -/** - * Create a MAPPING-END event. - * - * @param[out] event An empty event object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_mapping_end_event_initialize(yaml_event_t *event); - -/** - * Free any memory allocated for an event object. - * - * @param[in,out] event An event object. - */ - -YAML_DECLARE(void) -yaml_event_delete(yaml_event_t *event); - -/** @} */ - -/** - * @defgroup nodes Nodes - * @{ - */ - -/** The tag @c !!null with the only possible value: @c null. */ -#define YAML_NULL_TAG "tag:yaml.org,2002:null" -/** The tag @c !!bool with the values: @c true and @c falce. */ -#define YAML_BOOL_TAG "tag:yaml.org,2002:bool" -/** The tag @c !!str for string values. */ -#define YAML_STR_TAG "tag:yaml.org,2002:str" -/** The tag @c !!int for integer values. */ -#define YAML_INT_TAG "tag:yaml.org,2002:int" -/** The tag @c !!float for float values. */ -#define YAML_FLOAT_TAG "tag:yaml.org,2002:float" -/** The tag @c !!timestamp for date and time values. */ -#define YAML_TIMESTAMP_TAG "tag:yaml.org,2002:timestamp" - -/** The tag @c !!seq is used to denote sequences. */ -#define YAML_SEQ_TAG "tag:yaml.org,2002:seq" -/** The tag @c !!map is used to denote mapping. */ -#define YAML_MAP_TAG "tag:yaml.org,2002:map" - -/** The default scalar tag is @c !!str. */ -#define YAML_DEFAULT_SCALAR_TAG YAML_STR_TAG -/** The default sequence tag is @c !!seq. */ -#define YAML_DEFAULT_SEQUENCE_TAG YAML_SEQ_TAG -/** The default mapping tag is @c !!map. */ -#define YAML_DEFAULT_MAPPING_TAG YAML_MAP_TAG - -/** Node types. */ -typedef enum yaml_node_type_e { - /** An empty node. */ - YAML_NO_NODE, - - /** A scalar node. */ - YAML_SCALAR_NODE, - /** A sequence node. */ - YAML_SEQUENCE_NODE, - /** A mapping node. */ - YAML_MAPPING_NODE -} yaml_node_type_t; - -/** The forward definition of a document node structure. */ -typedef struct yaml_node_s yaml_node_t; - -/** An element of a sequence node. */ -typedef int yaml_node_item_t; - -/** An element of a mapping node. */ -typedef struct yaml_node_pair_s { - /** The key of the element. */ - int key; - /** The value of the element. */ - int value; -} yaml_node_pair_t; - -/** The node structure. */ -struct yaml_node_s { - - /** The node type. */ - yaml_node_type_t type; - - /** The node tag. */ - yaml_char_t *tag; - - /** The node data. */ - union { - - /** The scalar parameters (for @c YAML_SCALAR_NODE). */ - struct { - /** The scalar value. */ - yaml_char_t *value; - /** The length of the scalar value. */ - size_t length; - /** The scalar style. */ - yaml_scalar_style_t style; - } scalar; - - /** The sequence parameters (for @c YAML_SEQUENCE_NODE). */ - struct { - /** The stack of sequence items. */ - struct { - /** The beginning of the stack. */ - yaml_node_item_t *start; - /** The end of the stack. */ - yaml_node_item_t *end; - /** The top of the stack. */ - yaml_node_item_t *top; - } items; - /** The sequence style. */ - yaml_sequence_style_t style; - } sequence; - - /** The mapping parameters (for @c YAML_MAPPING_NODE). */ - struct { - /** The stack of mapping pairs (key, value). */ - struct { - /** The beginning of the stack. */ - yaml_node_pair_t *start; - /** The end of the stack. */ - yaml_node_pair_t *end; - /** The top of the stack. */ - yaml_node_pair_t *top; - } pairs; - /** The mapping style. */ - yaml_mapping_style_t style; - } mapping; - - } data; - - /** The beginning of the node. */ - yaml_mark_t start_mark; - /** The end of the node. */ - yaml_mark_t end_mark; - -}; - -/** The document structure. */ -typedef struct yaml_document_s { - - /** The document nodes. */ - struct { - /** The beginning of the stack. */ - yaml_node_t *start; - /** The end of the stack. */ - yaml_node_t *end; - /** The top of the stack. */ - yaml_node_t *top; - } nodes; - - /** The version directive. */ - yaml_version_directive_t *version_directive; - - /** The list of tag directives. */ - struct { - /** The beginning of the tag directives list. */ - yaml_tag_directive_t *start; - /** The end of the tag directives list. */ - yaml_tag_directive_t *end; - } tag_directives; - - /** Is the document start indicator implicit? */ - int start_implicit; - /** Is the document end indicator implicit? */ - int end_implicit; - - /** The beginning of the document. */ - yaml_mark_t start_mark; - /** The end of the document. */ - yaml_mark_t end_mark; - -} yaml_document_t; - -/** - * Create a YAML document. - * - * @param[out] document An empty document object. - * @param[in] version_directive The %YAML directive value or - * @c NULL. - * @param[in] tag_directives_start The beginning of the %TAG - * directives list. - * @param[in] tag_directives_end The end of the %TAG directives - * list. - * @param[in] start_implicit If the document start indicator is - * implicit. - * @param[in] end_implicit If the document end indicator is - * implicit. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_document_initialize(yaml_document_t *document, - yaml_version_directive_t *version_directive, - yaml_tag_directive_t *tag_directives_start, - yaml_tag_directive_t *tag_directives_end, - int start_implicit, int end_implicit); - -/** - * Delete a YAML document and all its nodes. - * - * @param[in,out] document A document object. - */ - -YAML_DECLARE(void) -yaml_document_delete(yaml_document_t *document); - -/** - * Get a node of a YAML document. - * - * The pointer returned by this function is valid until any of the functions - * modifying the documents are called. - * - * @param[in] document A document object. - * @param[in] index The node id. - * - * @returns the node objct or @c NULL if @c node_id is out of range. - */ - -YAML_DECLARE(yaml_node_t *) -yaml_document_get_node(yaml_document_t *document, int index); - -/** - * Get the root of a YAML document node. - * - * The root object is the first object added to the document. - * - * The pointer returned by this function is valid until any of the functions - * modifying the documents are called. - * - * An empty document produced by the parser signifies the end of a YAML - * stream. - * - * @param[in] document A document object. - * - * @returns the node object or @c NULL if the document is empty. - */ - -YAML_DECLARE(yaml_node_t *) -yaml_document_get_root_node(yaml_document_t *document); - -/** - * Create a SCALAR node and attach it to the document. - * - * The @a style argument may be ignored by the emitter. - * - * @param[in,out] document A document object. - * @param[in] tag The scalar tag. - * @param[in] value The scalar value. - * @param[in] length The length of the scalar value. - * @param[in] style The scalar style. - * - * @returns the node id or @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_document_add_scalar(yaml_document_t *document, - yaml_char_t *tag, yaml_char_t *value, int length, - yaml_scalar_style_t style); - -/** - * Create a SEQUENCE node and attach it to the document. - * - * The @a style argument may be ignored by the emitter. - * - * @param[in,out] document A document object. - * @param[in] tag The sequence tag. - * @param[in] style The sequence style. - * - * @returns the node id or @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_document_add_sequence(yaml_document_t *document, - yaml_char_t *tag, yaml_sequence_style_t style); - -/** - * Create a MAPPING node and attach it to the document. - * - * The @a style argument may be ignored by the emitter. - * - * @param[in,out] document A document object. - * @param[in] tag The sequence tag. - * @param[in] style The sequence style. - * - * @returns the node id or @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_document_add_mapping(yaml_document_t *document, - yaml_char_t *tag, yaml_mapping_style_t style); - -/** - * Add an item to a SEQUENCE node. - * - * @param[in,out] document A document object. - * @param[in] sequence The sequence node id. - * @param[in] item The item node id. -* - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_document_append_sequence_item(yaml_document_t *document, - int sequence, int item); - -/** - * Add a pair of a key and a value to a MAPPING node. - * - * @param[in,out] document A document object. - * @param[in] mapping The mapping node id. - * @param[in] key The key node id. - * @param[in] value The value node id. -* - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_document_append_mapping_pair(yaml_document_t *document, - int mapping, int key, int value); - -/** @} */ - -/** - * @defgroup parser Parser Definitions - * @{ - */ - -/** - * The prototype of a read handler. - * - * The read handler is called when the parser needs to read more bytes from the - * source. The handler should write not more than @a size bytes to the @a - * buffer. The number of written bytes should be set to the @a length variable. - * - * @param[in,out] data A pointer to an application data specified by - * yaml_parser_set_input(). - * @param[out] buffer The buffer to write the data from the source. - * @param[in] size The size of the buffer. - * @param[out] size_read The actual number of bytes read from the source. - * - * @returns On success, the handler should return @c 1. If the handler failed, - * the returned value should be @c 0. On EOF, the handler should set the - * @a size_read to @c 0 and return @c 1. - */ - -typedef int yaml_read_handler_t(void *data, unsigned char *buffer, size_t size, - size_t *size_read); - -/** - * This structure holds information about a potential simple key. - */ - -typedef struct yaml_simple_key_s { - /** Is a simple key possible? */ - int possible; - - /** Is a simple key required? */ - int required; - - /** The number of the token. */ - size_t token_number; - - /** The position mark. */ - yaml_mark_t mark; -} yaml_simple_key_t; - -/** - * The states of the parser. - */ -typedef enum yaml_parser_state_e { - /** Expect STREAM-START. */ - YAML_PARSE_STREAM_START_STATE, - /** Expect the beginning of an implicit document. */ - YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE, - /** Expect DOCUMENT-START. */ - YAML_PARSE_DOCUMENT_START_STATE, - /** Expect the content of a document. */ - YAML_PARSE_DOCUMENT_CONTENT_STATE, - /** Expect DOCUMENT-END. */ - YAML_PARSE_DOCUMENT_END_STATE, - /** Expect a block node. */ - YAML_PARSE_BLOCK_NODE_STATE, - /** Expect a block node or indentless sequence. */ - YAML_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE, - /** Expect a flow node. */ - YAML_PARSE_FLOW_NODE_STATE, - /** Expect the first entry of a block sequence. */ - YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE, - /** Expect an entry of a block sequence. */ - YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE, - /** Expect an entry of an indentless sequence. */ - YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE, - /** Expect the first key of a block mapping. */ - YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE, - /** Expect a block mapping key. */ - YAML_PARSE_BLOCK_MAPPING_KEY_STATE, - /** Expect a block mapping value. */ - YAML_PARSE_BLOCK_MAPPING_VALUE_STATE, - /** Expect the first entry of a flow sequence. */ - YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE, - /** Expect an entry of a flow sequence. */ - YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE, - /** Expect a key of an ordered mapping. */ - YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE, - /** Expect a value of an ordered mapping. */ - YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE, - /** Expect the and of an ordered mapping entry. */ - YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE, - /** Expect the first key of a flow mapping. */ - YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE, - /** Expect a key of a flow mapping. */ - YAML_PARSE_FLOW_MAPPING_KEY_STATE, - /** Expect a value of a flow mapping. */ - YAML_PARSE_FLOW_MAPPING_VALUE_STATE, - /** Expect an empty value of a flow mapping. */ - YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE, - /** Expect nothing. */ - YAML_PARSE_END_STATE -} yaml_parser_state_t; - -/** - * This structure holds aliases data. - */ - -typedef struct yaml_alias_data_s { - /** The anchor. */ - yaml_char_t *anchor; - /** The node id. */ - int index; - /** The anchor mark. */ - yaml_mark_t mark; -} yaml_alias_data_t; - -/** - * The parser structure. - * - * All members are internal. Manage the structure using the @c yaml_parser_ - * family of functions. - */ - -typedef struct yaml_parser_s { - - /** - * @name Error handling - * @{ - */ - - /** Error type. */ - yaml_error_type_t error; - /** Error description. */ - const char *problem; - /** The byte about which the problem occured. */ - size_t problem_offset; - /** The problematic value (@c -1 is none). */ - int problem_value; - /** The problem position. */ - yaml_mark_t problem_mark; - /** The error context. */ - const char *context; - /** The context position. */ - yaml_mark_t context_mark; - - /** - * @} - */ - - /** - * @name Reader stuff - * @{ - */ - - /** Read handler. */ - yaml_read_handler_t *read_handler; - - /** A pointer for passing to the read handler. */ - void *read_handler_data; - - /** Standard (string or file) input data. */ - union { - /** String input data. */ - struct { - /** The string start pointer. */ - const unsigned char *start; - /** The string end pointer. */ - const unsigned char *end; - /** The string current position. */ - const unsigned char *current; - } string; - - /** File input data. */ - FILE *file; - } input; - - /** EOF flag */ - int eof; - - /** The working buffer. */ - struct { - /** The beginning of the buffer. */ - yaml_char_t *start; - /** The end of the buffer. */ - yaml_char_t *end; - /** The current position of the buffer. */ - yaml_char_t *pointer; - /** The last filled position of the buffer. */ - yaml_char_t *last; - } buffer; - - /* The number of unread characters in the buffer. */ - size_t unread; - - /** The raw buffer. */ - struct { - /** The beginning of the buffer. */ - unsigned char *start; - /** The end of the buffer. */ - unsigned char *end; - /** The current position of the buffer. */ - unsigned char *pointer; - /** The last filled position of the buffer. */ - unsigned char *last; - } raw_buffer; - - /** The input encoding. */ - yaml_encoding_t encoding; - - /** The offset of the current position (in bytes). */ - size_t offset; - - /** The mark of the current position. */ - yaml_mark_t mark; - - /** - * @} - */ - - /** - * @name Scanner stuff - * @{ - */ - - /** Have we started to scan the input stream? */ - int stream_start_produced; - - /** Have we reached the end of the input stream? */ - int stream_end_produced; - - /** The number of unclosed '[' and '{' indicators. */ - int flow_level; - - /** The tokens queue. */ - struct { - /** The beginning of the tokens queue. */ - yaml_token_t *start; - /** The end of the tokens queue. */ - yaml_token_t *end; - /** The head of the tokens queue. */ - yaml_token_t *head; - /** The tail of the tokens queue. */ - yaml_token_t *tail; - } tokens; - - /** The number of tokens fetched from the queue. */ - size_t tokens_parsed; - - /* Does the tokens queue contain a token ready for dequeueing. */ - int token_available; - - /** The indentation levels stack. */ - struct { - /** The beginning of the stack. */ - int *start; - /** The end of the stack. */ - int *end; - /** The top of the stack. */ - int *top; - } indents; - - /** The current indentation level. */ - int indent; - - /** May a simple key occur at the current position? */ - int simple_key_allowed; - - /** The stack of simple keys. */ - struct { - /** The beginning of the stack. */ - yaml_simple_key_t *start; - /** The end of the stack. */ - yaml_simple_key_t *end; - /** The top of the stack. */ - yaml_simple_key_t *top; - } simple_keys; - - /** - * @} - */ - - /** - * @name Parser stuff - * @{ - */ - - /** The parser states stack. */ - struct { - /** The beginning of the stack. */ - yaml_parser_state_t *start; - /** The end of the stack. */ - yaml_parser_state_t *end; - /** The top of the stack. */ - yaml_parser_state_t *top; - } states; - - /** The current parser state. */ - yaml_parser_state_t state; - - /** The stack of marks. */ - struct { - /** The beginning of the stack. */ - yaml_mark_t *start; - /** The end of the stack. */ - yaml_mark_t *end; - /** The top of the stack. */ - yaml_mark_t *top; - } marks; - - /** The list of TAG directives. */ - struct { - /** The beginning of the list. */ - yaml_tag_directive_t *start; - /** The end of the list. */ - yaml_tag_directive_t *end; - /** The top of the list. */ - yaml_tag_directive_t *top; - } tag_directives; - - /** - * @} - */ - - /** - * @name Dumper stuff - * @{ - */ - - /** The alias data. */ - struct { - /** The beginning of the list. */ - yaml_alias_data_t *start; - /** The end of the list. */ - yaml_alias_data_t *end; - /** The top of the list. */ - yaml_alias_data_t *top; - } aliases; - - /** The currently parsed document. */ - yaml_document_t *document; - - /** - * @} - */ - -} yaml_parser_t; - -/** - * Initialize a parser. - * - * This function creates a new parser object. An application is responsible - * for destroying the object using the yaml_parser_delete() function. - * - * @param[out] parser An empty parser object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_parser_initialize(yaml_parser_t *parser); - -/** - * Destroy a parser. - * - * @param[in,out] parser A parser object. - */ - -YAML_DECLARE(void) -yaml_parser_delete(yaml_parser_t *parser); - -/** - * Set a string input. - * - * Note that the @a input pointer must be valid while the @a parser object - * exists. The application is responsible for destroing @a input after - * destroying the @a parser. - * - * @param[in,out] parser A parser object. - * @param[in] input A source data. - * @param[in] size The length of the source data in bytes. - */ - -YAML_DECLARE(void) -yaml_parser_set_input_string(yaml_parser_t *parser, - const unsigned char *input, size_t size); - -/** - * Set a file input. - * - * @a file should be a file object open for reading. The application is - * responsible for closing the @a file. - * - * @param[in,out] parser A parser object. - * @param[in] file An open file. - */ - -YAML_DECLARE(void) -yaml_parser_set_input_file(yaml_parser_t *parser, FILE *file); - -/** - * Set a generic input handler. - * - * @param[in,out] parser A parser object. - * @param[in] handler A read handler. - * @param[in] data Any application data for passing to the read - * handler. - */ - -YAML_DECLARE(void) -yaml_parser_set_input(yaml_parser_t *parser, - yaml_read_handler_t *handler, void *data); - -/** - * Set the source encoding. - * - * @param[in,out] parser A parser object. - * @param[in] encoding The source encoding. - */ - -YAML_DECLARE(void) -yaml_parser_set_encoding(yaml_parser_t *parser, yaml_encoding_t encoding); - -/** - * Scan the input stream and produce the next token. - * - * Call the function subsequently to produce a sequence of tokens corresponding - * to the input stream. The initial token has the type - * @c YAML_STREAM_START_TOKEN while the ending token has the type - * @c YAML_STREAM_END_TOKEN. - * - * An application is responsible for freeing any buffers associated with the - * produced token object using the @c yaml_token_delete function. - * - * An application must not alternate the calls of yaml_parser_scan() with the - * calls of yaml_parser_parse() or yaml_parser_load(). Doing this will break - * the parser. - * - * @param[in,out] parser A parser object. - * @param[out] token An empty token object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token); - -/** - * Parse the input stream and produce the next parsing event. - * - * Call the function subsequently to produce a sequence of events corresponding - * to the input stream. The initial event has the type - * @c YAML_STREAM_START_EVENT while the ending event has the type - * @c YAML_STREAM_END_EVENT. - * - * An application is responsible for freeing any buffers associated with the - * produced event object using the yaml_event_delete() function. - * - * An application must not alternate the calls of yaml_parser_parse() with the - * calls of yaml_parser_scan() or yaml_parser_load(). Doing this will break the - * parser. - * - * @param[in,out] parser A parser object. - * @param[out] event An empty event object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event); - -/** - * Parse the input stream and produce the next YAML document. - * - * Call this function subsequently to produce a sequence of documents - * constituting the input stream. - * - * If the produced document has no root node, it means that the document - * end has been reached. - * - * An application is responsible for freeing any data associated with the - * produced document object using the yaml_document_delete() function. - * - * An application must not alternate the calls of yaml_parser_load() with the - * calls of yaml_parser_scan() or yaml_parser_parse(). Doing this will break - * the parser. - * - * @param[in,out] parser A parser object. - * @param[out] document An empty document object. - * - * @return @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document); - -/** @} */ - -/** - * @defgroup emitter Emitter Definitions - * @{ - */ - -/** - * The prototype of a write handler. - * - * The write handler is called when the emitter needs to flush the accumulated - * characters to the output. The handler should write @a size bytes of the - * @a buffer to the output. - * - * @param[in,out] data A pointer to an application data specified by - * yaml_emitter_set_output(). - * @param[in] buffer The buffer with bytes to be written. - * @param[in] size The size of the buffer. - * - * @returns On success, the handler should return @c 1. If the handler failed, - * the returned value should be @c 0. - */ - -typedef int yaml_write_handler_t(void *data, unsigned char *buffer, size_t size); - -/** The emitter states. */ -typedef enum yaml_emitter_state_e { - /** Expect STREAM-START. */ - YAML_EMIT_STREAM_START_STATE, - /** Expect the first DOCUMENT-START or STREAM-END. */ - YAML_EMIT_FIRST_DOCUMENT_START_STATE, - /** Expect DOCUMENT-START or STREAM-END. */ - YAML_EMIT_DOCUMENT_START_STATE, - /** Expect the content of a document. */ - YAML_EMIT_DOCUMENT_CONTENT_STATE, - /** Expect DOCUMENT-END. */ - YAML_EMIT_DOCUMENT_END_STATE, - /** Expect the first item of a flow sequence. */ - YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE, - /** Expect an item of a flow sequence. */ - YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE, - /** Expect the first key of a flow mapping. */ - YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE, - /** Expect a key of a flow mapping. */ - YAML_EMIT_FLOW_MAPPING_KEY_STATE, - /** Expect a value for a simple key of a flow mapping. */ - YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE, - /** Expect a value of a flow mapping. */ - YAML_EMIT_FLOW_MAPPING_VALUE_STATE, - /** Expect the first item of a block sequence. */ - YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE, - /** Expect an item of a block sequence. */ - YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE, - /** Expect the first key of a block mapping. */ - YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE, - /** Expect the key of a block mapping. */ - YAML_EMIT_BLOCK_MAPPING_KEY_STATE, - /** Expect a value for a simple key of a block mapping. */ - YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE, - /** Expect a value of a block mapping. */ - YAML_EMIT_BLOCK_MAPPING_VALUE_STATE, - /** Expect nothing. */ - YAML_EMIT_END_STATE -} yaml_emitter_state_t; - -/** - * The emitter structure. - * - * All members are internal. Manage the structure using the @c yaml_emitter_ - * family of functions. - */ - -typedef struct yaml_emitter_s { - - /** - * @name Error handling - * @{ - */ - - /** Error type. */ - yaml_error_type_t error; - /** Error description. */ - const char *problem; - - /** - * @} - */ - - /** - * @name Writer stuff - * @{ - */ - - /** Write handler. */ - yaml_write_handler_t *write_handler; - - /** A pointer for passing to the white handler. */ - void *write_handler_data; - - /** Standard (string or file) output data. */ - union { - /** String output data. */ - struct { - /** The buffer pointer. */ - unsigned char *buffer; - /** The buffer size. */ - size_t size; - /** The number of written bytes. */ - size_t *size_written; - } string; - - /** File output data. */ - FILE *file; - } output; - - /** The working buffer. */ - struct { - /** The beginning of the buffer. */ - yaml_char_t *start; - /** The end of the buffer. */ - yaml_char_t *end; - /** The current position of the buffer. */ - yaml_char_t *pointer; - /** The last filled position of the buffer. */ - yaml_char_t *last; - } buffer; - - /** The raw buffer. */ - struct { - /** The beginning of the buffer. */ - unsigned char *start; - /** The end of the buffer. */ - unsigned char *end; - /** The current position of the buffer. */ - unsigned char *pointer; - /** The last filled position of the buffer. */ - unsigned char *last; - } raw_buffer; - - /** The stream encoding. */ - yaml_encoding_t encoding; - - /** - * @} - */ - - /** - * @name Emitter stuff - * @{ - */ - - /** If the output is in the canonical style? */ - int canonical; - /** The number of indentation spaces. */ - int best_indent; - /** The preferred width of the output lines. */ - int best_width; - /** Allow unescaped non-ASCII characters? */ - int unicode; - /** The preferred line break. */ - yaml_break_t line_break; - - /** The stack of states. */ - struct { - /** The beginning of the stack. */ - yaml_emitter_state_t *start; - /** The end of the stack. */ - yaml_emitter_state_t *end; - /** The top of the stack. */ - yaml_emitter_state_t *top; - } states; - - /** The current emitter state. */ - yaml_emitter_state_t state; - - /** The event queue. */ - struct { - /** The beginning of the event queue. */ - yaml_event_t *start; - /** The end of the event queue. */ - yaml_event_t *end; - /** The head of the event queue. */ - yaml_event_t *head; - /** The tail of the event queue. */ - yaml_event_t *tail; - } events; - - /** The stack of indentation levels. */ - struct { - /** The beginning of the stack. */ - int *start; - /** The end of the stack. */ - int *end; - /** The top of the stack. */ - int *top; - } indents; - - /** The list of tag directives. */ - struct { - /** The beginning of the list. */ - yaml_tag_directive_t *start; - /** The end of the list. */ - yaml_tag_directive_t *end; - /** The top of the list. */ - yaml_tag_directive_t *top; - } tag_directives; - - /** The current indentation level. */ - int indent; - - /** The current flow level. */ - int flow_level; - - /** Is it the document root context? */ - int root_context; - /** Is it a sequence context? */ - int sequence_context; - /** Is it a mapping context? */ - int mapping_context; - /** Is it a simple mapping key context? */ - int simple_key_context; - - /** The current line. */ - int line; - /** The current column. */ - int column; - /** If the last character was a whitespace? */ - int whitespace; - /** If the last character was an indentation character (' ', '-', '?', ':')? */ - int indention; - /** If an explicit document end is required? */ - int open_ended; - - /** Anchor analysis. */ - struct { - /** The anchor value. */ - yaml_char_t *anchor; - /** The anchor length. */ - size_t anchor_length; - /** Is it an alias? */ - int alias; - } anchor_data; - - /** Tag analysis. */ - struct { - /** The tag handle. */ - yaml_char_t *handle; - /** The tag handle length. */ - size_t handle_length; - /** The tag suffix. */ - yaml_char_t *suffix; - /** The tag suffix length. */ - size_t suffix_length; - } tag_data; - - /** Scalar analysis. */ - struct { - /** The scalar value. */ - yaml_char_t *value; - /** The scalar length. */ - size_t length; - /** Does the scalar contain line breaks? */ - int multiline; - /** Can the scalar be expessed in the flow plain style? */ - int flow_plain_allowed; - /** Can the scalar be expressed in the block plain style? */ - int block_plain_allowed; - /** Can the scalar be expressed in the single quoted style? */ - int single_quoted_allowed; - /** Can the scalar be expressed in the literal or folded styles? */ - int block_allowed; - /** The output style. */ - yaml_scalar_style_t style; - } scalar_data; - - /** - * @} - */ - - /** - * @name Dumper stuff - * @{ - */ - - /** If the stream was already opened? */ - int opened; - /** If the stream was already closed? */ - int closed; - - /** The information associated with the document nodes. */ - struct { - /** The number of references. */ - int references; - /** The anchor id. */ - int anchor; - /** If the node has been emitted? */ - int serialized; - } *anchors; - - /** The last assigned anchor id. */ - int last_anchor_id; - - /** The currently emitted document. */ - yaml_document_t *document; - - /** - * @} - */ - -} yaml_emitter_t; - -/** - * Initialize an emitter. - * - * This function creates a new emitter object. An application is responsible - * for destroying the object using the yaml_emitter_delete() function. - * - * @param[out] emitter An empty parser object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_emitter_initialize(yaml_emitter_t *emitter); - -/** - * Destroy an emitter. - * - * @param[in,out] emitter An emitter object. - */ - -YAML_DECLARE(void) -yaml_emitter_delete(yaml_emitter_t *emitter); - -/** - * Set a string output. - * - * The emitter will write the output characters to the @a output buffer of the - * size @a size. The emitter will set @a size_written to the number of written - * bytes. If the buffer is smaller than required, the emitter produces the - * YAML_WRITE_ERROR error. - * - * @param[in,out] emitter An emitter object. - * @param[in] output An output buffer. - * @param[in] size The buffer size. - * @param[in] size_written The pointer to save the number of written - * bytes. - */ - -YAML_DECLARE(void) -yaml_emitter_set_output_string(yaml_emitter_t *emitter, - unsigned char *output, size_t size, size_t *size_written); - -/** - * Set a file output. - * - * @a file should be a file object open for writing. The application is - * responsible for closing the @a file. - * - * @param[in,out] emitter An emitter object. - * @param[in] file An open file. - */ - -YAML_DECLARE(void) -yaml_emitter_set_output_file(yaml_emitter_t *emitter, FILE *file); - -/** - * Set a generic output handler. - * - * @param[in,out] emitter An emitter object. - * @param[in] handler A write handler. - * @param[in] data Any application data for passing to the write - * handler. - */ - -YAML_DECLARE(void) -yaml_emitter_set_output(yaml_emitter_t *emitter, - yaml_write_handler_t *handler, void *data); - -/** - * Set the output encoding. - * - * @param[in,out] emitter An emitter object. - * @param[in] encoding The output encoding. - */ - -YAML_DECLARE(void) -yaml_emitter_set_encoding(yaml_emitter_t *emitter, yaml_encoding_t encoding); - -/** - * Set if the output should be in the "canonical" format as in the YAML - * specification. - * - * @param[in,out] emitter An emitter object. - * @param[in] canonical If the output is canonical. - */ - -YAML_DECLARE(void) -yaml_emitter_set_canonical(yaml_emitter_t *emitter, int canonical); - -/** - * Set the intendation increment. - * - * @param[in,out] emitter An emitter object. - * @param[in] indent The indentation increment (1 < . < 10). - */ - -YAML_DECLARE(void) -yaml_emitter_set_indent(yaml_emitter_t *emitter, int indent); - -/** - * Set the preferred line width. @c -1 means unlimited. - * - * @param[in,out] emitter An emitter object. - * @param[in] width The preferred line width. - */ - -YAML_DECLARE(void) -yaml_emitter_set_width(yaml_emitter_t *emitter, int width); - -/** - * Set if unescaped non-ASCII characters are allowed. - * - * @param[in,out] emitter An emitter object. - * @param[in] unicode If unescaped Unicode characters are allowed. - */ - -YAML_DECLARE(void) -yaml_emitter_set_unicode(yaml_emitter_t *emitter, int unicode); - -/** - * Set the preferred line break. - * - * @param[in,out] emitter An emitter object. - * @param[in] line_break The preferred line break. - */ - -YAML_DECLARE(void) -yaml_emitter_set_break(yaml_emitter_t *emitter, yaml_break_t line_break); - -/** - * Emit an event. - * - * The event object may be generated using the yaml_parser_parse() function. - * The emitter takes the responsibility for the event object and destroys its - * content after it is emitted. The event object is destroyed even if the - * function fails. - * - * @param[in,out] emitter An emitter object. - * @param[in,out] event An event object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event); - -/** - * Start a YAML stream. - * - * This function should be used before yaml_emitter_dump() is called. - * - * @param[in,out] emitter An emitter object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_emitter_open(yaml_emitter_t *emitter); - -/** - * Finish a YAML stream. - * - * This function should be used after yaml_emitter_dump() is called. - * - * @param[in,out] emitter An emitter object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_emitter_close(yaml_emitter_t *emitter); - -/** - * Emit a YAML document. - * - * The documen object may be generated using the yaml_parser_load() function - * or the yaml_document_initialize() function. The emitter takes the - * responsibility for the document object and destoys its content after - * it is emitted. The document object is destroyedeven if the function fails. - * - * @param[in,out] emitter An emitter object. - * @param[in,out] document A document object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_emitter_dump(yaml_emitter_t *emitter, yaml_document_t *document); - -/** - * Flush the accumulated characters to the output. - * - * @param[in,out] emitter An emitter object. - * - * @returns @c 1 if the function succeeded, @c 0 on error. - */ - -YAML_DECLARE(int) -yaml_emitter_flush(yaml_emitter_t *emitter); - -/** @} */ - -#ifdef __cplusplus -} -#endif - -#endif /* #ifndef YAML_H */ - +/**+ * @file yaml.h+ * @brief Public interface for libyaml.+ * + * Include the header file with the code:+ * @code+ * #include <yaml.h>+ * @endcode+ */++#ifndef YAML_H+#define YAML_H++#ifdef __cplusplus+extern "C" {+#endif++#include <stdlib.h>+#include <stdio.h>+#include <string.h>++/**+ * @defgroup export Export Definitions+ * @{+ */++/** The public API declaration. */++#define YAML_DECLARE_STATIC++#ifdef WIN32+# if defined(YAML_DECLARE_STATIC)+# define YAML_DECLARE(type) type+# elif defined(YAML_DECLARE_EXPORT)+# define YAML_DECLARE(type) __declspec(dllexport) type+# else+# define YAML_DECLARE(type) __declspec(dllimport) type+# endif+#else+# define YAML_DECLARE(type) type+#endif++/** @} */++/**+ * @defgroup version Version Information+ * @{+ */++/**+ * Get the library version as a string.+ *+ * @returns The function returns the pointer to a static string of the form+ * @c "X.Y.Z", where @c X is the major version number, @c Y is a minor version+ * number, and @c Z is the patch version number.+ */++YAML_DECLARE(const char *)+yaml_get_version_string(void);++/**+ * Get the library version numbers.+ *+ * @param[out] major Major version number.+ * @param[out] minor Minor version number.+ * @param[out] patch Patch version number.+ */++YAML_DECLARE(void)+yaml_get_version(int *major, int *minor, int *patch);++/** @} */++/**+ * @defgroup basic Basic Types+ * @{+ */++/** The character type (UTF-8 octet). */+typedef unsigned char yaml_char_t;++/** The version directive data. */+typedef struct yaml_version_directive_s {+ /** The major version number. */+ int major;+ /** The minor version number. */+ int minor;+} yaml_version_directive_t;++/** The tag directive data. */+typedef struct yaml_tag_directive_s {+ /** The tag handle. */+ yaml_char_t *handle;+ /** The tag prefix. */+ yaml_char_t *prefix;+} yaml_tag_directive_t;++/** The stream encoding. */+typedef enum yaml_encoding_e {+ /** Let the parser choose the encoding. */+ YAML_ANY_ENCODING,+ /** The default UTF-8 encoding. */+ YAML_UTF8_ENCODING,+ /** The UTF-16-LE encoding with BOM. */+ YAML_UTF16LE_ENCODING,+ /** The UTF-16-BE encoding with BOM. */+ YAML_UTF16BE_ENCODING+} yaml_encoding_t;++/** Line break types. */++typedef enum yaml_break_e {+ /** Let the parser choose the break type. */+ YAML_ANY_BREAK,+ /** Use CR for line breaks (Mac style). */+ YAML_CR_BREAK,+ /** Use LN for line breaks (Unix style). */+ YAML_LN_BREAK,+ /** Use CR LN for line breaks (DOS style). */+ YAML_CRLN_BREAK+} yaml_break_t;++/** Many bad things could happen with the parser and emitter. */+typedef enum yaml_error_type_e {+ /** No error is produced. */+ YAML_NO_ERROR,++ /** Cannot allocate or reallocate a block of memory. */+ YAML_MEMORY_ERROR,++ /** Cannot read or decode the input stream. */+ YAML_READER_ERROR,+ /** Cannot scan the input stream. */+ YAML_SCANNER_ERROR,+ /** Cannot parse the input stream. */+ YAML_PARSER_ERROR,+ /** Cannot compose a YAML document. */+ YAML_COMPOSER_ERROR,++ /** Cannot write to the output stream. */+ YAML_WRITER_ERROR,+ /** Cannot emit a YAML stream. */+ YAML_EMITTER_ERROR+} yaml_error_type_t;++/** The pointer position. */+typedef struct yaml_mark_s {+ /** The position index. */+ size_t index;++ /** The position line. */+ size_t line;++ /** The position column. */+ size_t column;+} yaml_mark_t;++/** @} */++/**+ * @defgroup styles Node Styles+ * @{+ */++/** Scalar styles. */+typedef enum yaml_scalar_style_e {+ /** Let the emitter choose the style. */+ YAML_ANY_SCALAR_STYLE,++ /** The plain scalar style. */+ YAML_PLAIN_SCALAR_STYLE,++ /** The single-quoted scalar style. */+ YAML_SINGLE_QUOTED_SCALAR_STYLE,+ /** The double-quoted scalar style. */+ YAML_DOUBLE_QUOTED_SCALAR_STYLE,++ /** The literal scalar style. */+ YAML_LITERAL_SCALAR_STYLE,+ /** The folded scalar style. */+ YAML_FOLDED_SCALAR_STYLE+} yaml_scalar_style_t;++/** Sequence styles. */+typedef enum yaml_sequence_style_e {+ /** Let the emitter choose the style. */+ YAML_ANY_SEQUENCE_STYLE,++ /** The block sequence style. */+ YAML_BLOCK_SEQUENCE_STYLE,+ /** The flow sequence style. */+ YAML_FLOW_SEQUENCE_STYLE+} yaml_sequence_style_t;++/** Mapping styles. */+typedef enum yaml_mapping_style_e {+ /** Let the emitter choose the style. */+ YAML_ANY_MAPPING_STYLE,++ /** The block mapping style. */+ YAML_BLOCK_MAPPING_STYLE,+ /** The flow mapping style. */+ YAML_FLOW_MAPPING_STYLE+/* YAML_FLOW_SET_MAPPING_STYLE */+} yaml_mapping_style_t;++/** @} */++/**+ * @defgroup tokens Tokens+ * @{+ */++/** Token types. */+typedef enum yaml_token_type_e {+ /** An empty token. */+ YAML_NO_TOKEN,++ /** A STREAM-START token. */+ YAML_STREAM_START_TOKEN,+ /** A STREAM-END token. */+ YAML_STREAM_END_TOKEN,++ /** A VERSION-DIRECTIVE token. */+ YAML_VERSION_DIRECTIVE_TOKEN,+ /** A TAG-DIRECTIVE token. */+ YAML_TAG_DIRECTIVE_TOKEN,+ /** A DOCUMENT-START token. */+ YAML_DOCUMENT_START_TOKEN,+ /** A DOCUMENT-END token. */+ YAML_DOCUMENT_END_TOKEN,++ /** A BLOCK-SEQUENCE-START token. */+ YAML_BLOCK_SEQUENCE_START_TOKEN,+ /** A BLOCK-SEQUENCE-END token. */+ YAML_BLOCK_MAPPING_START_TOKEN,+ /** A BLOCK-END token. */+ YAML_BLOCK_END_TOKEN,++ /** A FLOW-SEQUENCE-START token. */+ YAML_FLOW_SEQUENCE_START_TOKEN,+ /** A FLOW-SEQUENCE-END token. */+ YAML_FLOW_SEQUENCE_END_TOKEN,+ /** A FLOW-MAPPING-START token. */+ YAML_FLOW_MAPPING_START_TOKEN,+ /** A FLOW-MAPPING-END token. */+ YAML_FLOW_MAPPING_END_TOKEN,++ /** A BLOCK-ENTRY token. */+ YAML_BLOCK_ENTRY_TOKEN,+ /** A FLOW-ENTRY token. */+ YAML_FLOW_ENTRY_TOKEN,+ /** A KEY token. */+ YAML_KEY_TOKEN,+ /** A VALUE token. */+ YAML_VALUE_TOKEN,++ /** An ALIAS token. */+ YAML_ALIAS_TOKEN,+ /** An ANCHOR token. */+ YAML_ANCHOR_TOKEN,+ /** A TAG token. */+ YAML_TAG_TOKEN,+ /** A SCALAR token. */+ YAML_SCALAR_TOKEN+} yaml_token_type_t;++/** The token structure. */+typedef struct yaml_token_s {++ /** The token type. */+ yaml_token_type_t type;++ /** The token data. */+ union {++ /** The stream start (for @c YAML_STREAM_START_TOKEN). */+ struct {+ /** The stream encoding. */+ yaml_encoding_t encoding;+ } stream_start;++ /** The alias (for @c YAML_ALIAS_TOKEN). */+ struct {+ /** The alias value. */+ yaml_char_t *value;+ } alias;++ /** The anchor (for @c YAML_ANCHOR_TOKEN). */+ struct {+ /** The anchor value. */+ yaml_char_t *value;+ } anchor;++ /** The tag (for @c YAML_TAG_TOKEN). */+ struct {+ /** The tag handle. */+ yaml_char_t *handle;+ /** The tag suffix. */+ yaml_char_t *suffix;+ } tag;++ /** The scalar value (for @c YAML_SCALAR_TOKEN). */+ struct {+ /** The scalar value. */+ yaml_char_t *value;+ /** The length of the scalar value. */+ size_t length;+ /** The scalar style. */+ yaml_scalar_style_t style;+ } scalar;++ /** The version directive (for @c YAML_VERSION_DIRECTIVE_TOKEN). */+ struct {+ /** The major version number. */+ int major;+ /** The minor version number. */+ int minor;+ } version_directive;++ /** The tag directive (for @c YAML_TAG_DIRECTIVE_TOKEN). */+ struct {+ /** The tag handle. */+ yaml_char_t *handle;+ /** The tag prefix. */+ yaml_char_t *prefix;+ } tag_directive;++ } data;++ /** The beginning of the token. */+ yaml_mark_t start_mark;+ /** The end of the token. */+ yaml_mark_t end_mark;++} yaml_token_t;++/**+ * Free any memory allocated for a token object.+ *+ * @param[in,out] token A token object.+ */++YAML_DECLARE(void)+yaml_token_delete(yaml_token_t *token);++/** @} */++/**+ * @defgroup events Events+ * @{+ */++/** Event types. */+typedef enum yaml_event_type_e {+ /** An empty event. */+ YAML_NO_EVENT,++ /** A STREAM-START event. */+ YAML_STREAM_START_EVENT,+ /** A STREAM-END event. */+ YAML_STREAM_END_EVENT,++ /** A DOCUMENT-START event. */+ YAML_DOCUMENT_START_EVENT,+ /** A DOCUMENT-END event. */+ YAML_DOCUMENT_END_EVENT,++ /** An ALIAS event. */+ YAML_ALIAS_EVENT,+ /** A SCALAR event. */+ YAML_SCALAR_EVENT,++ /** A SEQUENCE-START event. */+ YAML_SEQUENCE_START_EVENT,+ /** A SEQUENCE-END event. */+ YAML_SEQUENCE_END_EVENT,++ /** A MAPPING-START event. */+ YAML_MAPPING_START_EVENT,+ /** A MAPPING-END event. */+ YAML_MAPPING_END_EVENT+} yaml_event_type_t;++/** The event structure. */+typedef struct yaml_event_s {++ /** The event type. */+ yaml_event_type_t type;++ /** The event data. */+ union {+ + /** The stream parameters (for @c YAML_STREAM_START_EVENT). */+ struct {+ /** The document encoding. */+ yaml_encoding_t encoding;+ } stream_start;++ /** The document parameters (for @c YAML_DOCUMENT_START_EVENT). */+ struct {+ /** The version directive. */+ yaml_version_directive_t *version_directive;++ /** The list of tag directives. */+ struct {+ /** The beginning of the tag directives list. */+ yaml_tag_directive_t *start;+ /** The end of the tag directives list. */+ yaml_tag_directive_t *end;+ } tag_directives;++ /** Is the document indicator implicit? */+ int implicit;+ } document_start;++ /** The document end parameters (for @c YAML_DOCUMENT_END_EVENT). */+ struct {+ /** Is the document end indicator implicit? */+ int implicit;+ } document_end;++ /** The alias parameters (for @c YAML_ALIAS_EVENT). */+ struct {+ /** The anchor. */+ yaml_char_t *anchor;+ } alias;++ /** The scalar parameters (for @c YAML_SCALAR_EVENT). */+ struct {+ /** The anchor. */+ yaml_char_t *anchor;+ /** The tag. */+ yaml_char_t *tag;+ /** The scalar value. */+ yaml_char_t *value;+ /** The length of the scalar value. */+ size_t length;+ /** Is the tag optional for the plain style? */+ int plain_implicit;+ /** Is the tag optional for any non-plain style? */+ int quoted_implicit;+ /** The scalar style. */+ yaml_scalar_style_t style;+ } scalar;++ /** The sequence parameters (for @c YAML_SEQUENCE_START_EVENT). */+ struct {+ /** The anchor. */+ yaml_char_t *anchor;+ /** The tag. */+ yaml_char_t *tag;+ /** Is the tag optional? */+ int implicit;+ /** The sequence style. */+ yaml_sequence_style_t style;+ } sequence_start;++ /** The mapping parameters (for @c YAML_MAPPING_START_EVENT). */+ struct {+ /** The anchor. */+ yaml_char_t *anchor;+ /** The tag. */+ yaml_char_t *tag;+ /** Is the tag optional? */+ int implicit;+ /** The mapping style. */+ yaml_mapping_style_t style;+ } mapping_start;++ } data;++ /** The beginning of the event. */+ yaml_mark_t start_mark;+ /** The end of the event. */+ yaml_mark_t end_mark;++} yaml_event_t;++/**+ * Create the STREAM-START event.+ *+ * @param[out] event An empty event object.+ * @param[in] encoding The stream encoding.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_stream_start_event_initialize(yaml_event_t *event,+ yaml_encoding_t encoding);++/**+ * Create the STREAM-END event.+ *+ * @param[out] event An empty event object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_stream_end_event_initialize(yaml_event_t *event);++/**+ * Create the DOCUMENT-START event.+ *+ * The @a implicit argument is considered as a stylistic parameter and may be+ * ignored by the emitter.+ *+ * @param[out] event An empty event object.+ * @param[in] version_directive The %YAML directive value or+ * @c NULL.+ * @param[in] tag_directives_start The beginning of the %TAG+ * directives list.+ * @param[in] tag_directives_end The end of the %TAG directives+ * list.+ * @param[in] implicit If the document start indicator is+ * implicit.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_document_start_event_initialize(yaml_event_t *event,+ yaml_version_directive_t *version_directive,+ yaml_tag_directive_t *tag_directives_start,+ yaml_tag_directive_t *tag_directives_end,+ int implicit);++/**+ * Create the DOCUMENT-END event.+ *+ * The @a implicit argument is considered as a stylistic parameter and may be+ * ignored by the emitter.+ *+ * @param[out] event An empty event object.+ * @param[in] implicit If the document end indicator is implicit.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_document_end_event_initialize(yaml_event_t *event, int implicit);++/**+ * Create an ALIAS event.+ *+ * @param[out] event An empty event object.+ * @param[in] anchor The anchor value.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_alias_event_initialize(yaml_event_t *event, yaml_char_t *anchor);++/**+ * Create a SCALAR event.+ *+ * The @a style argument may be ignored by the emitter.+ *+ * Either the @a tag attribute or one of the @a plain_implicit and+ * @a quoted_implicit flags must be set.+ *+ * @param[out] event An empty event object.+ * @param[in] anchor The scalar anchor or @c NULL.+ * @param[in] tag The scalar tag or @c NULL.+ * @param[in] value The scalar value.+ * @param[in] length The length of the scalar value.+ * @param[in] plain_implicit If the tag may be omitted for the plain+ * style.+ * @param[in] quoted_implicit If the tag may be omitted for any+ * non-plain style.+ * @param[in] style The scalar style.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_scalar_event_initialize(yaml_event_t *event,+ yaml_char_t *anchor, yaml_char_t *tag,+ yaml_char_t *value, int length,+ int plain_implicit, int quoted_implicit,+ yaml_scalar_style_t style);++/**+ * Create a SEQUENCE-START event.+ *+ * The @a style argument may be ignored by the emitter.+ *+ * Either the @a tag attribute or the @a implicit flag must be set.+ *+ * @param[out] event An empty event object.+ * @param[in] anchor The sequence anchor or @c NULL.+ * @param[in] tag The sequence tag or @c NULL.+ * @param[in] implicit If the tag may be omitted.+ * @param[in] style The sequence style.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_sequence_start_event_initialize(yaml_event_t *event,+ yaml_char_t *anchor, yaml_char_t *tag, int implicit,+ yaml_sequence_style_t style);++/**+ * Create a SEQUENCE-END event.+ *+ * @param[out] event An empty event object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_sequence_end_event_initialize(yaml_event_t *event);++/**+ * Create a MAPPING-START event.+ *+ * The @a style argument may be ignored by the emitter.+ *+ * Either the @a tag attribute or the @a implicit flag must be set.+ *+ * @param[out] event An empty event object.+ * @param[in] anchor The mapping anchor or @c NULL.+ * @param[in] tag The mapping tag or @c NULL.+ * @param[in] implicit If the tag may be omitted.+ * @param[in] style The mapping style.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_mapping_start_event_initialize(yaml_event_t *event,+ yaml_char_t *anchor, yaml_char_t *tag, int implicit,+ yaml_mapping_style_t style);++/**+ * Create a MAPPING-END event.+ *+ * @param[out] event An empty event object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_mapping_end_event_initialize(yaml_event_t *event);++/**+ * Free any memory allocated for an event object.+ *+ * @param[in,out] event An event object.+ */++YAML_DECLARE(void)+yaml_event_delete(yaml_event_t *event);++/** @} */++/**+ * @defgroup nodes Nodes+ * @{+ */++/** The tag @c !!null with the only possible value: @c null. */+#define YAML_NULL_TAG "tag:yaml.org,2002:null"+/** The tag @c !!bool with the values: @c true and @c falce. */+#define YAML_BOOL_TAG "tag:yaml.org,2002:bool"+/** The tag @c !!str for string values. */+#define YAML_STR_TAG "tag:yaml.org,2002:str"+/** The tag @c !!int for integer values. */+#define YAML_INT_TAG "tag:yaml.org,2002:int"+/** The tag @c !!float for float values. */+#define YAML_FLOAT_TAG "tag:yaml.org,2002:float"+/** The tag @c !!timestamp for date and time values. */+#define YAML_TIMESTAMP_TAG "tag:yaml.org,2002:timestamp"++/** The tag @c !!seq is used to denote sequences. */+#define YAML_SEQ_TAG "tag:yaml.org,2002:seq"+/** The tag @c !!map is used to denote mapping. */+#define YAML_MAP_TAG "tag:yaml.org,2002:map"++/** The default scalar tag is @c !!str. */+#define YAML_DEFAULT_SCALAR_TAG YAML_STR_TAG+/** The default sequence tag is @c !!seq. */+#define YAML_DEFAULT_SEQUENCE_TAG YAML_SEQ_TAG+/** The default mapping tag is @c !!map. */+#define YAML_DEFAULT_MAPPING_TAG YAML_MAP_TAG++/** Node types. */+typedef enum yaml_node_type_e {+ /** An empty node. */+ YAML_NO_NODE,++ /** A scalar node. */+ YAML_SCALAR_NODE,+ /** A sequence node. */+ YAML_SEQUENCE_NODE,+ /** A mapping node. */+ YAML_MAPPING_NODE+} yaml_node_type_t;++/** The forward definition of a document node structure. */+typedef struct yaml_node_s yaml_node_t;++/** An element of a sequence node. */+typedef int yaml_node_item_t;++/** An element of a mapping node. */+typedef struct yaml_node_pair_s {+ /** The key of the element. */+ int key;+ /** The value of the element. */+ int value;+} yaml_node_pair_t;++/** The node structure. */+struct yaml_node_s {++ /** The node type. */+ yaml_node_type_t type;++ /** The node tag. */+ yaml_char_t *tag;++ /** The node data. */+ union {+ + /** The scalar parameters (for @c YAML_SCALAR_NODE). */+ struct {+ /** The scalar value. */+ yaml_char_t *value;+ /** The length of the scalar value. */+ size_t length;+ /** The scalar style. */+ yaml_scalar_style_t style;+ } scalar;++ /** The sequence parameters (for @c YAML_SEQUENCE_NODE). */+ struct {+ /** The stack of sequence items. */+ struct {+ /** The beginning of the stack. */+ yaml_node_item_t *start;+ /** The end of the stack. */+ yaml_node_item_t *end;+ /** The top of the stack. */+ yaml_node_item_t *top;+ } items;+ /** The sequence style. */+ yaml_sequence_style_t style;+ } sequence;++ /** The mapping parameters (for @c YAML_MAPPING_NODE). */+ struct {+ /** The stack of mapping pairs (key, value). */+ struct {+ /** The beginning of the stack. */+ yaml_node_pair_t *start;+ /** The end of the stack. */+ yaml_node_pair_t *end;+ /** The top of the stack. */+ yaml_node_pair_t *top;+ } pairs;+ /** The mapping style. */+ yaml_mapping_style_t style;+ } mapping;++ } data;++ /** The beginning of the node. */+ yaml_mark_t start_mark;+ /** The end of the node. */+ yaml_mark_t end_mark;++};++/** The document structure. */+typedef struct yaml_document_s {++ /** The document nodes. */+ struct {+ /** The beginning of the stack. */+ yaml_node_t *start;+ /** The end of the stack. */+ yaml_node_t *end;+ /** The top of the stack. */+ yaml_node_t *top;+ } nodes;++ /** The version directive. */+ yaml_version_directive_t *version_directive;++ /** The list of tag directives. */+ struct {+ /** The beginning of the tag directives list. */+ yaml_tag_directive_t *start;+ /** The end of the tag directives list. */+ yaml_tag_directive_t *end;+ } tag_directives;++ /** Is the document start indicator implicit? */+ int start_implicit;+ /** Is the document end indicator implicit? */+ int end_implicit;++ /** The beginning of the document. */+ yaml_mark_t start_mark;+ /** The end of the document. */+ yaml_mark_t end_mark;++} yaml_document_t;++/**+ * Create a YAML document.+ *+ * @param[out] document An empty document object.+ * @param[in] version_directive The %YAML directive value or+ * @c NULL.+ * @param[in] tag_directives_start The beginning of the %TAG+ * directives list.+ * @param[in] tag_directives_end The end of the %TAG directives+ * list.+ * @param[in] start_implicit If the document start indicator is+ * implicit.+ * @param[in] end_implicit If the document end indicator is+ * implicit.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_document_initialize(yaml_document_t *document,+ yaml_version_directive_t *version_directive,+ yaml_tag_directive_t *tag_directives_start,+ yaml_tag_directive_t *tag_directives_end,+ int start_implicit, int end_implicit);++/**+ * Delete a YAML document and all its nodes.+ *+ * @param[in,out] document A document object.+ */++YAML_DECLARE(void)+yaml_document_delete(yaml_document_t *document);++/**+ * Get a node of a YAML document.+ *+ * The pointer returned by this function is valid until any of the functions+ * modifying the documents are called.+ *+ * @param[in] document A document object.+ * @param[in] index The node id.+ *+ * @returns the node objct or @c NULL if @c node_id is out of range.+ */++YAML_DECLARE(yaml_node_t *)+yaml_document_get_node(yaml_document_t *document, int index);++/**+ * Get the root of a YAML document node.+ *+ * The root object is the first object added to the document.+ *+ * The pointer returned by this function is valid until any of the functions+ * modifying the documents are called.+ *+ * An empty document produced by the parser signifies the end of a YAML+ * stream.+ *+ * @param[in] document A document object.+ *+ * @returns the node object or @c NULL if the document is empty.+ */++YAML_DECLARE(yaml_node_t *)+yaml_document_get_root_node(yaml_document_t *document);++/**+ * Create a SCALAR node and attach it to the document.+ *+ * The @a style argument may be ignored by the emitter.+ *+ * @param[in,out] document A document object.+ * @param[in] tag The scalar tag.+ * @param[in] value The scalar value.+ * @param[in] length The length of the scalar value.+ * @param[in] style The scalar style.+ *+ * @returns the node id or @c 0 on error.+ */++YAML_DECLARE(int)+yaml_document_add_scalar(yaml_document_t *document,+ yaml_char_t *tag, yaml_char_t *value, int length,+ yaml_scalar_style_t style);++/**+ * Create a SEQUENCE node and attach it to the document.+ *+ * The @a style argument may be ignored by the emitter.+ *+ * @param[in,out] document A document object.+ * @param[in] tag The sequence tag.+ * @param[in] style The sequence style.+ *+ * @returns the node id or @c 0 on error.+ */++YAML_DECLARE(int)+yaml_document_add_sequence(yaml_document_t *document,+ yaml_char_t *tag, yaml_sequence_style_t style);++/**+ * Create a MAPPING node and attach it to the document.+ *+ * The @a style argument may be ignored by the emitter.+ *+ * @param[in,out] document A document object.+ * @param[in] tag The sequence tag.+ * @param[in] style The sequence style.+ *+ * @returns the node id or @c 0 on error.+ */++YAML_DECLARE(int)+yaml_document_add_mapping(yaml_document_t *document,+ yaml_char_t *tag, yaml_mapping_style_t style);++/**+ * Add an item to a SEQUENCE node.+ *+ * @param[in,out] document A document object.+ * @param[in] sequence The sequence node id.+ * @param[in] item The item node id.+*+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_document_append_sequence_item(yaml_document_t *document,+ int sequence, int item);++/**+ * Add a pair of a key and a value to a MAPPING node.+ *+ * @param[in,out] document A document object.+ * @param[in] mapping The mapping node id.+ * @param[in] key The key node id.+ * @param[in] value The value node id.+*+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_document_append_mapping_pair(yaml_document_t *document,+ int mapping, int key, int value);++/** @} */++/**+ * @defgroup parser Parser Definitions+ * @{+ */++/**+ * The prototype of a read handler.+ *+ * The read handler is called when the parser needs to read more bytes from the+ * source. The handler should write not more than @a size bytes to the @a+ * buffer. The number of written bytes should be set to the @a length variable.+ *+ * @param[in,out] data A pointer to an application data specified by+ * yaml_parser_set_input().+ * @param[out] buffer The buffer to write the data from the source.+ * @param[in] size The size of the buffer.+ * @param[out] size_read The actual number of bytes read from the source.+ *+ * @returns On success, the handler should return @c 1. If the handler failed,+ * the returned value should be @c 0. On EOF, the handler should set the+ * @a size_read to @c 0 and return @c 1.+ */++typedef int yaml_read_handler_t(void *data, unsigned char *buffer, size_t size,+ size_t *size_read);++/**+ * This structure holds information about a potential simple key.+ */++typedef struct yaml_simple_key_s {+ /** Is a simple key possible? */+ int possible;++ /** Is a simple key required? */+ int required;++ /** The number of the token. */+ size_t token_number;++ /** The position mark. */+ yaml_mark_t mark;+} yaml_simple_key_t;++/**+ * The states of the parser.+ */+typedef enum yaml_parser_state_e {+ /** Expect STREAM-START. */+ YAML_PARSE_STREAM_START_STATE,+ /** Expect the beginning of an implicit document. */+ YAML_PARSE_IMPLICIT_DOCUMENT_START_STATE,+ /** Expect DOCUMENT-START. */+ YAML_PARSE_DOCUMENT_START_STATE,+ /** Expect the content of a document. */+ YAML_PARSE_DOCUMENT_CONTENT_STATE,+ /** Expect DOCUMENT-END. */+ YAML_PARSE_DOCUMENT_END_STATE,+ /** Expect a block node. */+ YAML_PARSE_BLOCK_NODE_STATE,+ /** Expect a block node or indentless sequence. */+ YAML_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE,+ /** Expect a flow node. */+ YAML_PARSE_FLOW_NODE_STATE,+ /** Expect the first entry of a block sequence. */+ YAML_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE,+ /** Expect an entry of a block sequence. */+ YAML_PARSE_BLOCK_SEQUENCE_ENTRY_STATE,+ /** Expect an entry of an indentless sequence. */+ YAML_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE,+ /** Expect the first key of a block mapping. */+ YAML_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE,+ /** Expect a block mapping key. */+ YAML_PARSE_BLOCK_MAPPING_KEY_STATE,+ /** Expect a block mapping value. */+ YAML_PARSE_BLOCK_MAPPING_VALUE_STATE,+ /** Expect the first entry of a flow sequence. */+ YAML_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE,+ /** Expect an entry of a flow sequence. */+ YAML_PARSE_FLOW_SEQUENCE_ENTRY_STATE,+ /** Expect a key of an ordered mapping. */+ YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE,+ /** Expect a value of an ordered mapping. */+ YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE,+ /** Expect the and of an ordered mapping entry. */+ YAML_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE,+ /** Expect the first key of a flow mapping. */+ YAML_PARSE_FLOW_MAPPING_FIRST_KEY_STATE,+ /** Expect a key of a flow mapping. */+ YAML_PARSE_FLOW_MAPPING_KEY_STATE,+ /** Expect a value of a flow mapping. */+ YAML_PARSE_FLOW_MAPPING_VALUE_STATE,+ /** Expect an empty value of a flow mapping. */+ YAML_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE,+ /** Expect nothing. */+ YAML_PARSE_END_STATE+} yaml_parser_state_t;++/**+ * This structure holds aliases data.+ */++typedef struct yaml_alias_data_s {+ /** The anchor. */+ yaml_char_t *anchor;+ /** The node id. */+ int index;+ /** The anchor mark. */+ yaml_mark_t mark;+} yaml_alias_data_t;++/**+ * The parser structure.+ *+ * All members are internal. Manage the structure using the @c yaml_parser_+ * family of functions.+ */++typedef struct yaml_parser_s {++ /**+ * @name Error handling+ * @{+ */++ /** Error type. */+ yaml_error_type_t error;+ /** Error description. */+ const char *problem;+ /** The byte about which the problem occured. */+ size_t problem_offset;+ /** The problematic value (@c -1 is none). */+ int problem_value;+ /** The problem position. */+ yaml_mark_t problem_mark;+ /** The error context. */+ const char *context;+ /** The context position. */+ yaml_mark_t context_mark;++ /**+ * @}+ */++ /**+ * @name Reader stuff+ * @{+ */++ /** Read handler. */+ yaml_read_handler_t *read_handler;++ /** A pointer for passing to the read handler. */+ void *read_handler_data;++ /** Standard (string or file) input data. */+ union {+ /** String input data. */+ struct {+ /** The string start pointer. */+ const unsigned char *start;+ /** The string end pointer. */+ const unsigned char *end;+ /** The string current position. */+ const unsigned char *current;+ } string;++ /** File input data. */+ FILE *file;+ } input;++ /** EOF flag */+ int eof;++ /** The working buffer. */+ struct {+ /** The beginning of the buffer. */+ yaml_char_t *start;+ /** The end of the buffer. */+ yaml_char_t *end;+ /** The current position of the buffer. */+ yaml_char_t *pointer;+ /** The last filled position of the buffer. */+ yaml_char_t *last;+ } buffer;++ /* The number of unread characters in the buffer. */+ size_t unread;++ /** The raw buffer. */+ struct {+ /** The beginning of the buffer. */+ unsigned char *start;+ /** The end of the buffer. */+ unsigned char *end;+ /** The current position of the buffer. */+ unsigned char *pointer;+ /** The last filled position of the buffer. */+ unsigned char *last;+ } raw_buffer;++ /** The input encoding. */+ yaml_encoding_t encoding;++ /** The offset of the current position (in bytes). */+ size_t offset;++ /** The mark of the current position. */+ yaml_mark_t mark;++ /**+ * @}+ */++ /**+ * @name Scanner stuff+ * @{+ */++ /** Have we started to scan the input stream? */+ int stream_start_produced;++ /** Have we reached the end of the input stream? */+ int stream_end_produced;++ /** The number of unclosed '[' and '{' indicators. */+ int flow_level;++ /** The tokens queue. */+ struct {+ /** The beginning of the tokens queue. */+ yaml_token_t *start;+ /** The end of the tokens queue. */+ yaml_token_t *end;+ /** The head of the tokens queue. */+ yaml_token_t *head;+ /** The tail of the tokens queue. */+ yaml_token_t *tail;+ } tokens;++ /** The number of tokens fetched from the queue. */+ size_t tokens_parsed;++ /* Does the tokens queue contain a token ready for dequeueing. */+ int token_available;++ /** The indentation levels stack. */+ struct {+ /** The beginning of the stack. */+ int *start;+ /** The end of the stack. */+ int *end;+ /** The top of the stack. */+ int *top;+ } indents;++ /** The current indentation level. */+ int indent;++ /** May a simple key occur at the current position? */+ int simple_key_allowed;++ /** The stack of simple keys. */+ struct {+ /** The beginning of the stack. */+ yaml_simple_key_t *start;+ /** The end of the stack. */+ yaml_simple_key_t *end;+ /** The top of the stack. */+ yaml_simple_key_t *top;+ } simple_keys;++ /**+ * @}+ */++ /**+ * @name Parser stuff+ * @{+ */++ /** The parser states stack. */+ struct {+ /** The beginning of the stack. */+ yaml_parser_state_t *start;+ /** The end of the stack. */+ yaml_parser_state_t *end;+ /** The top of the stack. */+ yaml_parser_state_t *top;+ } states;++ /** The current parser state. */+ yaml_parser_state_t state;++ /** The stack of marks. */+ struct {+ /** The beginning of the stack. */+ yaml_mark_t *start;+ /** The end of the stack. */+ yaml_mark_t *end;+ /** The top of the stack. */+ yaml_mark_t *top;+ } marks;++ /** The list of TAG directives. */+ struct {+ /** The beginning of the list. */+ yaml_tag_directive_t *start;+ /** The end of the list. */+ yaml_tag_directive_t *end;+ /** The top of the list. */+ yaml_tag_directive_t *top;+ } tag_directives;++ /**+ * @}+ */++ /**+ * @name Dumper stuff+ * @{+ */++ /** The alias data. */+ struct {+ /** The beginning of the list. */+ yaml_alias_data_t *start;+ /** The end of the list. */+ yaml_alias_data_t *end;+ /** The top of the list. */+ yaml_alias_data_t *top;+ } aliases;++ /** The currently parsed document. */+ yaml_document_t *document;++ /**+ * @}+ */++} yaml_parser_t;++/**+ * Initialize a parser.+ *+ * This function creates a new parser object. An application is responsible+ * for destroying the object using the yaml_parser_delete() function.+ *+ * @param[out] parser An empty parser object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_parser_initialize(yaml_parser_t *parser);++/**+ * Destroy a parser.+ *+ * @param[in,out] parser A parser object.+ */++YAML_DECLARE(void)+yaml_parser_delete(yaml_parser_t *parser);++/**+ * Set a string input.+ *+ * Note that the @a input pointer must be valid while the @a parser object+ * exists. The application is responsible for destroing @a input after+ * destroying the @a parser.+ *+ * @param[in,out] parser A parser object.+ * @param[in] input A source data.+ * @param[in] size The length of the source data in bytes.+ */++YAML_DECLARE(void)+yaml_parser_set_input_string(yaml_parser_t *parser,+ const unsigned char *input, size_t size);++/**+ * Set a file input.+ *+ * @a file should be a file object open for reading. The application is+ * responsible for closing the @a file.+ *+ * @param[in,out] parser A parser object.+ * @param[in] file An open file.+ */++YAML_DECLARE(void)+yaml_parser_set_input_file(yaml_parser_t *parser, FILE *file);++/**+ * Set a generic input handler.+ *+ * @param[in,out] parser A parser object.+ * @param[in] handler A read handler.+ * @param[in] data Any application data for passing to the read+ * handler.+ */++YAML_DECLARE(void)+yaml_parser_set_input(yaml_parser_t *parser,+ yaml_read_handler_t *handler, void *data);++/**+ * Set the source encoding.+ *+ * @param[in,out] parser A parser object.+ * @param[in] encoding The source encoding.+ */++YAML_DECLARE(void)+yaml_parser_set_encoding(yaml_parser_t *parser, yaml_encoding_t encoding);++/**+ * Scan the input stream and produce the next token.+ *+ * Call the function subsequently to produce a sequence of tokens corresponding+ * to the input stream. The initial token has the type+ * @c YAML_STREAM_START_TOKEN while the ending token has the type+ * @c YAML_STREAM_END_TOKEN.+ *+ * An application is responsible for freeing any buffers associated with the+ * produced token object using the @c yaml_token_delete function.+ *+ * An application must not alternate the calls of yaml_parser_scan() with the+ * calls of yaml_parser_parse() or yaml_parser_load(). Doing this will break+ * the parser.+ *+ * @param[in,out] parser A parser object.+ * @param[out] token An empty token object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_parser_scan(yaml_parser_t *parser, yaml_token_t *token);++/**+ * Parse the input stream and produce the next parsing event.+ *+ * Call the function subsequently to produce a sequence of events corresponding+ * to the input stream. The initial event has the type+ * @c YAML_STREAM_START_EVENT while the ending event has the type+ * @c YAML_STREAM_END_EVENT.+ *+ * An application is responsible for freeing any buffers associated with the+ * produced event object using the yaml_event_delete() function.+ *+ * An application must not alternate the calls of yaml_parser_parse() with the+ * calls of yaml_parser_scan() or yaml_parser_load(). Doing this will break the+ * parser.+ *+ * @param[in,out] parser A parser object.+ * @param[out] event An empty event object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_parser_parse(yaml_parser_t *parser, yaml_event_t *event);++/**+ * Parse the input stream and produce the next YAML document.+ *+ * Call this function subsequently to produce a sequence of documents+ * constituting the input stream.+ *+ * If the produced document has no root node, it means that the document+ * end has been reached.+ *+ * An application is responsible for freeing any data associated with the+ * produced document object using the yaml_document_delete() function.+ *+ * An application must not alternate the calls of yaml_parser_load() with the+ * calls of yaml_parser_scan() or yaml_parser_parse(). Doing this will break+ * the parser.+ *+ * @param[in,out] parser A parser object.+ * @param[out] document An empty document object.+ *+ * @return @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_parser_load(yaml_parser_t *parser, yaml_document_t *document);++/** @} */++/**+ * @defgroup emitter Emitter Definitions+ * @{+ */++/**+ * The prototype of a write handler.+ *+ * The write handler is called when the emitter needs to flush the accumulated+ * characters to the output. The handler should write @a size bytes of the+ * @a buffer to the output.+ *+ * @param[in,out] data A pointer to an application data specified by+ * yaml_emitter_set_output().+ * @param[in] buffer The buffer with bytes to be written.+ * @param[in] size The size of the buffer.+ *+ * @returns On success, the handler should return @c 1. If the handler failed,+ * the returned value should be @c 0.+ */++typedef int yaml_write_handler_t(void *data, unsigned char *buffer, size_t size);++/** The emitter states. */+typedef enum yaml_emitter_state_e {+ /** Expect STREAM-START. */+ YAML_EMIT_STREAM_START_STATE,+ /** Expect the first DOCUMENT-START or STREAM-END. */+ YAML_EMIT_FIRST_DOCUMENT_START_STATE,+ /** Expect DOCUMENT-START or STREAM-END. */+ YAML_EMIT_DOCUMENT_START_STATE,+ /** Expect the content of a document. */+ YAML_EMIT_DOCUMENT_CONTENT_STATE,+ /** Expect DOCUMENT-END. */+ YAML_EMIT_DOCUMENT_END_STATE,+ /** Expect the first item of a flow sequence. */+ YAML_EMIT_FLOW_SEQUENCE_FIRST_ITEM_STATE,+ /** Expect an item of a flow sequence. */+ YAML_EMIT_FLOW_SEQUENCE_ITEM_STATE,+ /** Expect the first key of a flow mapping. */+ YAML_EMIT_FLOW_MAPPING_FIRST_KEY_STATE,+ /** Expect a key of a flow mapping. */+ YAML_EMIT_FLOW_MAPPING_KEY_STATE,+ /** Expect a value for a simple key of a flow mapping. */+ YAML_EMIT_FLOW_MAPPING_SIMPLE_VALUE_STATE,+ /** Expect a value of a flow mapping. */+ YAML_EMIT_FLOW_MAPPING_VALUE_STATE,+ /** Expect the first item of a block sequence. */+ YAML_EMIT_BLOCK_SEQUENCE_FIRST_ITEM_STATE,+ /** Expect an item of a block sequence. */+ YAML_EMIT_BLOCK_SEQUENCE_ITEM_STATE,+ /** Expect the first key of a block mapping. */+ YAML_EMIT_BLOCK_MAPPING_FIRST_KEY_STATE,+ /** Expect the key of a block mapping. */+ YAML_EMIT_BLOCK_MAPPING_KEY_STATE,+ /** Expect a value for a simple key of a block mapping. */+ YAML_EMIT_BLOCK_MAPPING_SIMPLE_VALUE_STATE,+ /** Expect a value of a block mapping. */+ YAML_EMIT_BLOCK_MAPPING_VALUE_STATE,+ /** Expect nothing. */+ YAML_EMIT_END_STATE+} yaml_emitter_state_t;++/**+ * The emitter structure.+ *+ * All members are internal. Manage the structure using the @c yaml_emitter_+ * family of functions.+ */++typedef struct yaml_emitter_s {++ /**+ * @name Error handling+ * @{+ */++ /** Error type. */+ yaml_error_type_t error;+ /** Error description. */+ const char *problem;++ /**+ * @}+ */++ /**+ * @name Writer stuff+ * @{+ */++ /** Write handler. */+ yaml_write_handler_t *write_handler;++ /** A pointer for passing to the white handler. */+ void *write_handler_data;++ /** Standard (string or file) output data. */+ union {+ /** String output data. */+ struct {+ /** The buffer pointer. */+ unsigned char *buffer;+ /** The buffer size. */+ size_t size;+ /** The number of written bytes. */+ size_t *size_written;+ } string;++ /** File output data. */+ FILE *file;+ } output;++ /** The working buffer. */+ struct {+ /** The beginning of the buffer. */+ yaml_char_t *start;+ /** The end of the buffer. */+ yaml_char_t *end;+ /** The current position of the buffer. */+ yaml_char_t *pointer;+ /** The last filled position of the buffer. */+ yaml_char_t *last;+ } buffer;++ /** The raw buffer. */+ struct {+ /** The beginning of the buffer. */+ unsigned char *start;+ /** The end of the buffer. */+ unsigned char *end;+ /** The current position of the buffer. */+ unsigned char *pointer;+ /** The last filled position of the buffer. */+ unsigned char *last;+ } raw_buffer;++ /** The stream encoding. */+ yaml_encoding_t encoding;++ /**+ * @}+ */++ /**+ * @name Emitter stuff+ * @{+ */++ /** If the output is in the canonical style? */+ int canonical;+ /** The number of indentation spaces. */+ int best_indent;+ /** The preferred width of the output lines. */+ int best_width;+ /** Allow unescaped non-ASCII characters? */+ int unicode;+ /** The preferred line break. */+ yaml_break_t line_break;++ /** The stack of states. */+ struct {+ /** The beginning of the stack. */+ yaml_emitter_state_t *start;+ /** The end of the stack. */+ yaml_emitter_state_t *end;+ /** The top of the stack. */+ yaml_emitter_state_t *top;+ } states;++ /** The current emitter state. */+ yaml_emitter_state_t state;++ /** The event queue. */+ struct {+ /** The beginning of the event queue. */+ yaml_event_t *start;+ /** The end of the event queue. */+ yaml_event_t *end;+ /** The head of the event queue. */+ yaml_event_t *head;+ /** The tail of the event queue. */+ yaml_event_t *tail;+ } events;++ /** The stack of indentation levels. */+ struct {+ /** The beginning of the stack. */+ int *start;+ /** The end of the stack. */+ int *end;+ /** The top of the stack. */+ int *top;+ } indents;++ /** The list of tag directives. */+ struct {+ /** The beginning of the list. */+ yaml_tag_directive_t *start;+ /** The end of the list. */+ yaml_tag_directive_t *end;+ /** The top of the list. */+ yaml_tag_directive_t *top;+ } tag_directives;++ /** The current indentation level. */+ int indent;++ /** The current flow level. */+ int flow_level;++ /** Is it the document root context? */+ int root_context;+ /** Is it a sequence context? */+ int sequence_context;+ /** Is it a mapping context? */+ int mapping_context;+ /** Is it a simple mapping key context? */+ int simple_key_context;++ /** The current line. */+ int line;+ /** The current column. */+ int column;+ /** If the last character was a whitespace? */+ int whitespace;+ /** If the last character was an indentation character (' ', '-', '?', ':')? */+ int indention;+ /** If an explicit document end is required? */+ int open_ended;++ /** Anchor analysis. */+ struct {+ /** The anchor value. */+ yaml_char_t *anchor;+ /** The anchor length. */+ size_t anchor_length;+ /** Is it an alias? */+ int alias;+ } anchor_data;++ /** Tag analysis. */+ struct {+ /** The tag handle. */+ yaml_char_t *handle;+ /** The tag handle length. */+ size_t handle_length;+ /** The tag suffix. */+ yaml_char_t *suffix;+ /** The tag suffix length. */+ size_t suffix_length;+ } tag_data;++ /** Scalar analysis. */+ struct {+ /** The scalar value. */+ yaml_char_t *value;+ /** The scalar length. */+ size_t length;+ /** Does the scalar contain line breaks? */+ int multiline;+ /** Can the scalar be expessed in the flow plain style? */+ int flow_plain_allowed;+ /** Can the scalar be expressed in the block plain style? */+ int block_plain_allowed;+ /** Can the scalar be expressed in the single quoted style? */+ int single_quoted_allowed;+ /** Can the scalar be expressed in the literal or folded styles? */+ int block_allowed;+ /** The output style. */+ yaml_scalar_style_t style;+ } scalar_data;++ /**+ * @}+ */++ /**+ * @name Dumper stuff+ * @{+ */++ /** If the stream was already opened? */+ int opened;+ /** If the stream was already closed? */+ int closed;++ /** The information associated with the document nodes. */+ struct {+ /** The number of references. */+ int references;+ /** The anchor id. */+ int anchor;+ /** If the node has been emitted? */+ int serialized;+ } *anchors;++ /** The last assigned anchor id. */+ int last_anchor_id;++ /** The currently emitted document. */+ yaml_document_t *document;++ /**+ * @}+ */++} yaml_emitter_t;++/**+ * Initialize an emitter.+ *+ * This function creates a new emitter object. An application is responsible+ * for destroying the object using the yaml_emitter_delete() function.+ *+ * @param[out] emitter An empty parser object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_emitter_initialize(yaml_emitter_t *emitter);++/**+ * Destroy an emitter.+ *+ * @param[in,out] emitter An emitter object.+ */++YAML_DECLARE(void)+yaml_emitter_delete(yaml_emitter_t *emitter);++/**+ * Set a string output.+ *+ * The emitter will write the output characters to the @a output buffer of the+ * size @a size. The emitter will set @a size_written to the number of written+ * bytes. If the buffer is smaller than required, the emitter produces the+ * YAML_WRITE_ERROR error.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] output An output buffer.+ * @param[in] size The buffer size.+ * @param[in] size_written The pointer to save the number of written+ * bytes.+ */++YAML_DECLARE(void)+yaml_emitter_set_output_string(yaml_emitter_t *emitter,+ unsigned char *output, size_t size, size_t *size_written);++/**+ * Set a file output.+ *+ * @a file should be a file object open for writing. The application is+ * responsible for closing the @a file.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] file An open file.+ */++YAML_DECLARE(void)+yaml_emitter_set_output_file(yaml_emitter_t *emitter, FILE *file);++/**+ * Set a generic output handler.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] handler A write handler.+ * @param[in] data Any application data for passing to the write+ * handler.+ */++YAML_DECLARE(void)+yaml_emitter_set_output(yaml_emitter_t *emitter,+ yaml_write_handler_t *handler, void *data);++/**+ * Set the output encoding.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] encoding The output encoding.+ */++YAML_DECLARE(void)+yaml_emitter_set_encoding(yaml_emitter_t *emitter, yaml_encoding_t encoding);++/**+ * Set if the output should be in the "canonical" format as in the YAML+ * specification.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] canonical If the output is canonical.+ */++YAML_DECLARE(void)+yaml_emitter_set_canonical(yaml_emitter_t *emitter, int canonical);++/**+ * Set the intendation increment.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] indent The indentation increment (1 < . < 10).+ */++YAML_DECLARE(void)+yaml_emitter_set_indent(yaml_emitter_t *emitter, int indent);++/**+ * Set the preferred line width. @c -1 means unlimited.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] width The preferred line width.+ */++YAML_DECLARE(void)+yaml_emitter_set_width(yaml_emitter_t *emitter, int width);++/**+ * Set if unescaped non-ASCII characters are allowed.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] unicode If unescaped Unicode characters are allowed.+ */++YAML_DECLARE(void)+yaml_emitter_set_unicode(yaml_emitter_t *emitter, int unicode);++/**+ * Set the preferred line break.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in] line_break The preferred line break.+ */++YAML_DECLARE(void)+yaml_emitter_set_break(yaml_emitter_t *emitter, yaml_break_t line_break);++/**+ * Emit an event.+ *+ * The event object may be generated using the yaml_parser_parse() function.+ * The emitter takes the responsibility for the event object and destroys its+ * content after it is emitted. The event object is destroyed even if the+ * function fails.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in,out] event An event object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_emitter_emit(yaml_emitter_t *emitter, yaml_event_t *event);++/**+ * Start a YAML stream.+ *+ * This function should be used before yaml_emitter_dump() is called.+ *+ * @param[in,out] emitter An emitter object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_emitter_open(yaml_emitter_t *emitter);++/**+ * Finish a YAML stream.+ *+ * This function should be used after yaml_emitter_dump() is called.+ *+ * @param[in,out] emitter An emitter object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_emitter_close(yaml_emitter_t *emitter);++/**+ * Emit a YAML document.+ *+ * The documen object may be generated using the yaml_parser_load() function+ * or the yaml_document_initialize() function. The emitter takes the+ * responsibility for the document object and destoys its content after+ * it is emitted. The document object is destroyedeven if the function fails.+ *+ * @param[in,out] emitter An emitter object.+ * @param[in,out] document A document object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_emitter_dump(yaml_emitter_t *emitter, yaml_document_t *document);++/**+ * Flush the accumulated characters to the output.+ *+ * @param[in,out] emitter An emitter object.+ *+ * @returns @c 1 if the function succeeded, @c 0 on error.+ */++YAML_DECLARE(int)+yaml_emitter_flush(yaml_emitter_t *emitter);++/** @} */++#ifdef __cplusplus+}+#endif++#endif /* #ifndef YAML_H */+
libyaml/yaml_private.h view
@@ -1,639 +1,639 @@- -#if HAVE_CONFIG_H -#include <config.h> -#endif - -#include <yaml.h> - -#include <assert.h> -#include <limits.h> - -/* - * Memory management. - */ - -YAML_DECLARE(void *) -yaml_malloc(size_t size); - -YAML_DECLARE(void *) -yaml_realloc(void *ptr, size_t size); - -YAML_DECLARE(void) -yaml_free(void *ptr); - -YAML_DECLARE(yaml_char_t *) -yaml_strdup(const yaml_char_t *); - -/* - * Reader: Ensure that the buffer contains at least `length` characters. - */ - -YAML_DECLARE(int) -yaml_parser_update_buffer(yaml_parser_t *parser, size_t length); - -/* - * Scanner: Ensure that the token stack contains at least one token ready. - */ - -YAML_DECLARE(int) -yaml_parser_fetch_more_tokens(yaml_parser_t *parser); - -/* - * The size of the input raw buffer. - */ - -#define INPUT_RAW_BUFFER_SIZE 16384 - -/* - * The size of the input buffer. - * - * It should be possible to decode the whole raw buffer. - */ - -#define INPUT_BUFFER_SIZE (INPUT_RAW_BUFFER_SIZE*3) - -/* - * The size of the output buffer. - */ - -#define OUTPUT_BUFFER_SIZE 16384 - -/* - * The size of the output raw buffer. - * - * It should be possible to encode the whole output buffer. - */ - -#define OUTPUT_RAW_BUFFER_SIZE (OUTPUT_BUFFER_SIZE*2+2) - -/* - * The size of other stacks and queues. - */ - -#define INITIAL_STACK_SIZE 16 -#define INITIAL_QUEUE_SIZE 16 -#define INITIAL_STRING_SIZE 16 - -/* - * Buffer management. - */ - -#define BUFFER_INIT(context,buffer,size) \ - (((buffer).start = yaml_malloc(size)) ? \ - ((buffer).last = (buffer).pointer = (buffer).start, \ - (buffer).end = (buffer).start+(size), \ - 1) : \ - ((context)->error = YAML_MEMORY_ERROR, \ - 0)) - -#define BUFFER_DEL(context,buffer) \ - (yaml_free((buffer).start), \ - (buffer).start = (buffer).pointer = (buffer).end = 0) - -/* - * String management. - */ - -typedef struct { - yaml_char_t *start; - yaml_char_t *end; - yaml_char_t *pointer; -} yaml_string_t; - -YAML_DECLARE(int) -yaml_string_extend(yaml_char_t **start, - yaml_char_t **pointer, yaml_char_t **end); - -YAML_DECLARE(int) -yaml_string_join( - yaml_char_t **a_start, yaml_char_t **a_pointer, yaml_char_t **a_end, - yaml_char_t **b_start, yaml_char_t **b_pointer, yaml_char_t **b_end); - -#define NULL_STRING { NULL, NULL, NULL } - -#define STRING(string,length) { (string), (string)+(length), (string) } - -#define STRING_INIT(context,string,size) \ - (((string).start = yaml_malloc(size)) ? \ - ((string).pointer = (string).start, \ - (string).end = (string).start+(size), \ - memset((string).start, 0, (size)), \ - 1) : \ - ((context)->error = YAML_MEMORY_ERROR, \ - 0)) - -#define STRING_DEL(context,string) \ - (yaml_free((string).start), \ - (string).start = (string).pointer = (string).end = 0) - -#define STRING_EXTEND(context,string) \ - (((string).pointer+5 < (string).end) \ - || yaml_string_extend(&(string).start, \ - &(string).pointer, &(string).end)) - -#define CLEAR(context,string) \ - ((string).pointer = (string).start, \ - memset((string).start, 0, (string).end-(string).start)) - -#define JOIN(context,string_a,string_b) \ - ((yaml_string_join(&(string_a).start, &(string_a).pointer, \ - &(string_a).end, &(string_b).start, \ - &(string_b).pointer, &(string_b).end)) ? \ - ((string_b).pointer = (string_b).start, \ - 1) : \ - ((context)->error = YAML_MEMORY_ERROR, \ - 0)) - -/* - * String check operations. - */ - -/* - * Check the octet at the specified position. - */ - -#define CHECK_AT(string,octet,offset) \ - ((string).pointer[offset] == (yaml_char_t)(octet)) - -/* - * Check the current octet in the buffer. - */ - -#define CHECK(string,octet) CHECK_AT((string),(octet),0) - -/* - * Check if the character at the specified position is an alphabetical - * character, a digit, '_', or '-'. - */ - -#define IS_ALPHA_AT(string,offset) \ - (((string).pointer[offset] >= (yaml_char_t) '0' && \ - (string).pointer[offset] <= (yaml_char_t) '9') || \ - ((string).pointer[offset] >= (yaml_char_t) 'A' && \ - (string).pointer[offset] <= (yaml_char_t) 'Z') || \ - ((string).pointer[offset] >= (yaml_char_t) 'a' && \ - (string).pointer[offset] <= (yaml_char_t) 'z') || \ - (string).pointer[offset] == '_' || \ - (string).pointer[offset] == '-') - -#define IS_ALPHA(string) IS_ALPHA_AT((string),0) - -/* - * Check if the character at the specified position is a digit. - */ - -#define IS_DIGIT_AT(string,offset) \ - (((string).pointer[offset] >= (yaml_char_t) '0' && \ - (string).pointer[offset] <= (yaml_char_t) '9')) - -#define IS_DIGIT(string) IS_DIGIT_AT((string),0) - -/* - * Get the value of a digit. - */ - -#define AS_DIGIT_AT(string,offset) \ - ((string).pointer[offset] - (yaml_char_t) '0') - -#define AS_DIGIT(string) AS_DIGIT_AT((string),0) - -/* - * Check if the character at the specified position is a hex-digit. - */ - -#define IS_HEX_AT(string,offset) \ - (((string).pointer[offset] >= (yaml_char_t) '0' && \ - (string).pointer[offset] <= (yaml_char_t) '9') || \ - ((string).pointer[offset] >= (yaml_char_t) 'A' && \ - (string).pointer[offset] <= (yaml_char_t) 'F') || \ - ((string).pointer[offset] >= (yaml_char_t) 'a' && \ - (string).pointer[offset] <= (yaml_char_t) 'f')) - -#define IS_HEX(string) IS_HEX_AT((string),0) - -/* - * Get the value of a hex-digit. - */ - -#define AS_HEX_AT(string,offset) \ - (((string).pointer[offset] >= (yaml_char_t) 'A' && \ - (string).pointer[offset] <= (yaml_char_t) 'F') ? \ - ((string).pointer[offset] - (yaml_char_t) 'A' + 10) : \ - ((string).pointer[offset] >= (yaml_char_t) 'a' && \ - (string).pointer[offset] <= (yaml_char_t) 'f') ? \ - ((string).pointer[offset] - (yaml_char_t) 'a' + 10) : \ - ((string).pointer[offset] - (yaml_char_t) '0')) - -#define AS_HEX(string) AS_HEX_AT((string),0) - -/* - * Check if the character is ASCII. - */ - -#define IS_ASCII_AT(string,offset) \ - ((string).pointer[offset] <= (yaml_char_t) '\x7F') - -#define IS_ASCII(string) IS_ASCII_AT((string),0) - -/* - * Check if the character can be printed unescaped. - */ - -#define IS_PRINTABLE_AT(string,offset) \ - (((string).pointer[offset] == 0x0A) /* . == #x0A */ \ - || ((string).pointer[offset] >= 0x20 /* #x20 <= . <= #x7E */ \ - && (string).pointer[offset] <= 0x7E) \ - || ((string).pointer[offset] == 0xC2 /* #0xA0 <= . <= #xD7FF */ \ - && (string).pointer[offset+1] >= 0xA0) \ - || ((string).pointer[offset] > 0xC2 \ - && (string).pointer[offset] < 0xED) \ - || ((string).pointer[offset] == 0xED \ - && (string).pointer[offset+1] < 0xA0) \ - || ((string).pointer[offset] == 0xEE) \ - || ((string).pointer[offset] == 0xEF /* #xE000 <= . <= #xFFFD */ \ - && !((string).pointer[offset+1] == 0xBB /* && . != #xFEFF */ \ - && (string).pointer[offset+2] == 0xBF) \ - && !((string).pointer[offset+1] == 0xBF \ - && ((string).pointer[offset+2] == 0xBE \ - || (string).pointer[offset+2] == 0xBF)))) - -#define IS_PRINTABLE(string) IS_PRINTABLE_AT((string),0) - -/* - * Check if the character at the specified position is NUL. - */ - -#define IS_Z_AT(string,offset) CHECK_AT((string),'\0',(offset)) - -#define IS_Z(string) IS_Z_AT((string),0) - -/* - * Check if the character at the specified position is BOM. - */ - -#define IS_BOM_AT(string,offset) \ - (CHECK_AT((string),'\xEF',(offset)) \ - && CHECK_AT((string),'\xBB',(offset)+1) \ - && CHECK_AT((string),'\xBF',(offset)+2)) /* BOM (#xFEFF) */ - -#define IS_BOM(string) IS_BOM_AT(string,0) - -/* - * Check if the character at the specified position is space. - */ - -#define IS_SPACE_AT(string,offset) CHECK_AT((string),' ',(offset)) - -#define IS_SPACE(string) IS_SPACE_AT((string),0) - -/* - * Check if the character at the specified position is tab. - */ - -#define IS_TAB_AT(string,offset) CHECK_AT((string),'\t',(offset)) - -#define IS_TAB(string) IS_TAB_AT((string),0) - -/* - * Check if the character at the specified position is blank (space or tab). - */ - -#define IS_BLANK_AT(string,offset) \ - (IS_SPACE_AT((string),(offset)) || IS_TAB_AT((string),(offset))) - -#define IS_BLANK(string) IS_BLANK_AT((string),0) - -/* - * Check if the character at the specified position is a line break. - */ - -#define IS_BREAK_AT(string,offset) \ - (CHECK_AT((string),'\r',(offset)) /* CR (#xD)*/ \ - || CHECK_AT((string),'\n',(offset)) /* LF (#xA) */ \ - || (CHECK_AT((string),'\xC2',(offset)) \ - && CHECK_AT((string),'\x85',(offset)+1)) /* NEL (#x85) */ \ - || (CHECK_AT((string),'\xE2',(offset)) \ - && CHECK_AT((string),'\x80',(offset)+1) \ - && CHECK_AT((string),'\xA8',(offset)+2)) /* LS (#x2028) */ \ - || (CHECK_AT((string),'\xE2',(offset)) \ - && CHECK_AT((string),'\x80',(offset)+1) \ - && CHECK_AT((string),'\xA9',(offset)+2))) /* PS (#x2029) */ - -#define IS_BREAK(string) IS_BREAK_AT((string),0) - -#define IS_CRLF_AT(string,offset) \ - (CHECK_AT((string),'\r',(offset)) && CHECK_AT((string),'\n',(offset)+1)) - -#define IS_CRLF(string) IS_CRLF_AT((string),0) - -/* - * Check if the character is a line break or NUL. - */ - -#define IS_BREAKZ_AT(string,offset) \ - (IS_BREAK_AT((string),(offset)) || IS_Z_AT((string),(offset))) - -#define IS_BREAKZ(string) IS_BREAKZ_AT((string),0) - -/* - * Check if the character is a line break, space, or NUL. - */ - -#define IS_SPACEZ_AT(string,offset) \ - (IS_SPACE_AT((string),(offset)) || IS_BREAKZ_AT((string),(offset))) - -#define IS_SPACEZ(string) IS_SPACEZ_AT((string),0) - -/* - * Check if the character is a line break, space, tab, or NUL. - */ - -#define IS_BLANKZ_AT(string,offset) \ - (IS_BLANK_AT((string),(offset)) || IS_BREAKZ_AT((string),(offset))) - -#define IS_BLANKZ(string) IS_BLANKZ_AT((string),0) - -/* - * Determine the width of the character. - */ - -#define WIDTH_AT(string,offset) \ - (((string).pointer[offset] & 0x80) == 0x00 ? 1 : \ - ((string).pointer[offset] & 0xE0) == 0xC0 ? 2 : \ - ((string).pointer[offset] & 0xF0) == 0xE0 ? 3 : \ - ((string).pointer[offset] & 0xF8) == 0xF0 ? 4 : 0) - -#define WIDTH(string) WIDTH_AT((string),0) - -/* - * Move the string pointer to the next character. - */ - -#define MOVE(string) ((string).pointer += WIDTH((string))) - -/* - * Copy a character and move the pointers of both strings. - */ - -#define COPY(string_a,string_b) \ - ((*(string_b).pointer & 0x80) == 0x00 ? \ - (*((string_a).pointer++) = *((string_b).pointer++)) : \ - (*(string_b).pointer & 0xE0) == 0xC0 ? \ - (*((string_a).pointer++) = *((string_b).pointer++), \ - *((string_a).pointer++) = *((string_b).pointer++)) : \ - (*(string_b).pointer & 0xF0) == 0xE0 ? \ - (*((string_a).pointer++) = *((string_b).pointer++), \ - *((string_a).pointer++) = *((string_b).pointer++), \ - *((string_a).pointer++) = *((string_b).pointer++)) : \ - (*(string_b).pointer & 0xF8) == 0xF0 ? \ - (*((string_a).pointer++) = *((string_b).pointer++), \ - *((string_a).pointer++) = *((string_b).pointer++), \ - *((string_a).pointer++) = *((string_b).pointer++), \ - *((string_a).pointer++) = *((string_b).pointer++)) : 0) - -/* - * Stack and queue management. - */ - -YAML_DECLARE(int) -yaml_stack_extend(void **start, void **top, void **end); - -YAML_DECLARE(int) -yaml_queue_extend(void **start, void **head, void **tail, void **end); - -#define STACK_INIT(context,stack,size) \ - (((stack).start = yaml_malloc((size)*sizeof(*(stack).start))) ? \ - ((stack).top = (stack).start, \ - (stack).end = (stack).start+(size), \ - 1) : \ - ((context)->error = YAML_MEMORY_ERROR, \ - 0)) - -#define STACK_DEL(context,stack) \ - (yaml_free((stack).start), \ - (stack).start = (stack).top = (stack).end = 0) - -#define STACK_EMPTY(context,stack) \ - ((stack).start == (stack).top) - -#define PUSH(context,stack,value) \ - (((stack).top != (stack).end \ - || yaml_stack_extend((void **)&(stack).start, \ - (void **)&(stack).top, (void **)&(stack).end)) ? \ - (*((stack).top++) = value, \ - 1) : \ - ((context)->error = YAML_MEMORY_ERROR, \ - 0)) - -#define POP(context,stack) \ - (*(--(stack).top)) - -#define QUEUE_INIT(context,queue,size) \ - (((queue).start = yaml_malloc((size)*sizeof(*(queue).start))) ? \ - ((queue).head = (queue).tail = (queue).start, \ - (queue).end = (queue).start+(size), \ - 1) : \ - ((context)->error = YAML_MEMORY_ERROR, \ - 0)) - -#define QUEUE_DEL(context,queue) \ - (yaml_free((queue).start), \ - (queue).start = (queue).head = (queue).tail = (queue).end = 0) - -#define QUEUE_EMPTY(context,queue) \ - ((queue).head == (queue).tail) - -#define ENQUEUE(context,queue,value) \ - (((queue).tail != (queue).end \ - || yaml_queue_extend((void **)&(queue).start, (void **)&(queue).head, \ - (void **)&(queue).tail, (void **)&(queue).end)) ? \ - (*((queue).tail++) = value, \ - 1) : \ - ((context)->error = YAML_MEMORY_ERROR, \ - 0)) - -#define DEQUEUE(context,queue) \ - (*((queue).head++)) - -#define QUEUE_INSERT(context,queue,index,value) \ - (((queue).tail != (queue).end \ - || yaml_queue_extend((void **)&(queue).start, (void **)&(queue).head, \ - (void **)&(queue).tail, (void **)&(queue).end)) ? \ - (memmove((queue).head+(index)+1,(queue).head+(index), \ - ((queue).tail-(queue).head-(index))*sizeof(*(queue).start)), \ - *((queue).head+(index)) = value, \ - (queue).tail++, \ - 1) : \ - ((context)->error = YAML_MEMORY_ERROR, \ - 0)) - -/* - * Token initializers. - */ - -#define TOKEN_INIT(token,token_type,token_start_mark,token_end_mark) \ - (memset(&(token), 0, sizeof(yaml_token_t)), \ - (token).type = (token_type), \ - (token).start_mark = (token_start_mark), \ - (token).end_mark = (token_end_mark)) - -#define STREAM_START_TOKEN_INIT(token,token_encoding,start_mark,end_mark) \ - (TOKEN_INIT((token),YAML_STREAM_START_TOKEN,(start_mark),(end_mark)), \ - (token).data.stream_start.encoding = (token_encoding)) - -#define STREAM_END_TOKEN_INIT(token,start_mark,end_mark) \ - (TOKEN_INIT((token),YAML_STREAM_END_TOKEN,(start_mark),(end_mark))) - -#define ALIAS_TOKEN_INIT(token,token_value,start_mark,end_mark) \ - (TOKEN_INIT((token),YAML_ALIAS_TOKEN,(start_mark),(end_mark)), \ - (token).data.alias.value = (token_value)) - -#define ANCHOR_TOKEN_INIT(token,token_value,start_mark,end_mark) \ - (TOKEN_INIT((token),YAML_ANCHOR_TOKEN,(start_mark),(end_mark)), \ - (token).data.anchor.value = (token_value)) - -#define TAG_TOKEN_INIT(token,token_handle,token_suffix,start_mark,end_mark) \ - (TOKEN_INIT((token),YAML_TAG_TOKEN,(start_mark),(end_mark)), \ - (token).data.tag.handle = (token_handle), \ - (token).data.tag.suffix = (token_suffix)) - -#define SCALAR_TOKEN_INIT(token,token_value,token_length,token_style,start_mark,end_mark) \ - (TOKEN_INIT((token),YAML_SCALAR_TOKEN,(start_mark),(end_mark)), \ - (token).data.scalar.value = (token_value), \ - (token).data.scalar.length = (token_length), \ - (token).data.scalar.style = (token_style)) - -#define VERSION_DIRECTIVE_TOKEN_INIT(token,token_major,token_minor,start_mark,end_mark) \ - (TOKEN_INIT((token),YAML_VERSION_DIRECTIVE_TOKEN,(start_mark),(end_mark)), \ - (token).data.version_directive.major = (token_major), \ - (token).data.version_directive.minor = (token_minor)) - -#define TAG_DIRECTIVE_TOKEN_INIT(token,token_handle,token_prefix,start_mark,end_mark) \ - (TOKEN_INIT((token),YAML_TAG_DIRECTIVE_TOKEN,(start_mark),(end_mark)), \ - (token).data.tag_directive.handle = (token_handle), \ - (token).data.tag_directive.prefix = (token_prefix)) - -/* - * Event initializers. - */ - -#define EVENT_INIT(event,event_type,event_start_mark,event_end_mark) \ - (memset(&(event), 0, sizeof(yaml_event_t)), \ - (event).type = (event_type), \ - (event).start_mark = (event_start_mark), \ - (event).end_mark = (event_end_mark)) - -#define STREAM_START_EVENT_INIT(event,event_encoding,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_STREAM_START_EVENT,(start_mark),(end_mark)), \ - (event).data.stream_start.encoding = (event_encoding)) - -#define STREAM_END_EVENT_INIT(event,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_STREAM_END_EVENT,(start_mark),(end_mark))) - -#define DOCUMENT_START_EVENT_INIT(event,event_version_directive, \ - event_tag_directives_start,event_tag_directives_end,event_implicit,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_DOCUMENT_START_EVENT,(start_mark),(end_mark)), \ - (event).data.document_start.version_directive = (event_version_directive), \ - (event).data.document_start.tag_directives.start = (event_tag_directives_start), \ - (event).data.document_start.tag_directives.end = (event_tag_directives_end), \ - (event).data.document_start.implicit = (event_implicit)) - -#define DOCUMENT_END_EVENT_INIT(event,event_implicit,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_DOCUMENT_END_EVENT,(start_mark),(end_mark)), \ - (event).data.document_end.implicit = (event_implicit)) - -#define ALIAS_EVENT_INIT(event,event_anchor,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_ALIAS_EVENT,(start_mark),(end_mark)), \ - (event).data.alias.anchor = (event_anchor)) - -#define SCALAR_EVENT_INIT(event,event_anchor,event_tag,event_value,event_length, \ - event_plain_implicit, event_quoted_implicit,event_style,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_SCALAR_EVENT,(start_mark),(end_mark)), \ - (event).data.scalar.anchor = (event_anchor), \ - (event).data.scalar.tag = (event_tag), \ - (event).data.scalar.value = (event_value), \ - (event).data.scalar.length = (event_length), \ - (event).data.scalar.plain_implicit = (event_plain_implicit), \ - (event).data.scalar.quoted_implicit = (event_quoted_implicit), \ - (event).data.scalar.style = (event_style)) - -#define SEQUENCE_START_EVENT_INIT(event,event_anchor,event_tag, \ - event_implicit,event_style,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_SEQUENCE_START_EVENT,(start_mark),(end_mark)), \ - (event).data.sequence_start.anchor = (event_anchor), \ - (event).data.sequence_start.tag = (event_tag), \ - (event).data.sequence_start.implicit = (event_implicit), \ - (event).data.sequence_start.style = (event_style)) - -#define SEQUENCE_END_EVENT_INIT(event,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_SEQUENCE_END_EVENT,(start_mark),(end_mark))) - -#define MAPPING_START_EVENT_INIT(event,event_anchor,event_tag, \ - event_implicit,event_style,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_MAPPING_START_EVENT,(start_mark),(end_mark)), \ - (event).data.mapping_start.anchor = (event_anchor), \ - (event).data.mapping_start.tag = (event_tag), \ - (event).data.mapping_start.implicit = (event_implicit), \ - (event).data.mapping_start.style = (event_style)) - -#define MAPPING_END_EVENT_INIT(event,start_mark,end_mark) \ - (EVENT_INIT((event),YAML_MAPPING_END_EVENT,(start_mark),(end_mark))) - -/* - * Document initializer. - */ - -#define DOCUMENT_INIT(document,document_nodes_start,document_nodes_end, \ - document_version_directive,document_tag_directives_start, \ - document_tag_directives_end,document_start_implicit, \ - document_end_implicit,document_start_mark,document_end_mark) \ - (memset(&(document), 0, sizeof(yaml_document_t)), \ - (document).nodes.start = (document_nodes_start), \ - (document).nodes.end = (document_nodes_end), \ - (document).nodes.top = (document_nodes_start), \ - (document).version_directive = (document_version_directive), \ - (document).tag_directives.start = (document_tag_directives_start), \ - (document).tag_directives.end = (document_tag_directives_end), \ - (document).start_implicit = (document_start_implicit), \ - (document).end_implicit = (document_end_implicit), \ - (document).start_mark = (document_start_mark), \ - (document).end_mark = (document_end_mark)) - -/* - * Node initializers. - */ - -#define NODE_INIT(node,node_type,node_tag,node_start_mark,node_end_mark) \ - (memset(&(node), 0, sizeof(yaml_node_t)), \ - (node).type = (node_type), \ - (node).tag = (node_tag), \ - (node).start_mark = (node_start_mark), \ - (node).end_mark = (node_end_mark)) - -#define SCALAR_NODE_INIT(node,node_tag,node_value,node_length, \ - node_style,start_mark,end_mark) \ - (NODE_INIT((node),YAML_SCALAR_NODE,(node_tag),(start_mark),(end_mark)), \ - (node).data.scalar.value = (node_value), \ - (node).data.scalar.length = (node_length), \ - (node).data.scalar.style = (node_style)) - -#define SEQUENCE_NODE_INIT(node,node_tag,node_items_start,node_items_end, \ - node_style,start_mark,end_mark) \ - (NODE_INIT((node),YAML_SEQUENCE_NODE,(node_tag),(start_mark),(end_mark)), \ - (node).data.sequence.items.start = (node_items_start), \ - (node).data.sequence.items.end = (node_items_end), \ - (node).data.sequence.items.top = (node_items_start), \ - (node).data.sequence.style = (node_style)) - -#define MAPPING_NODE_INIT(node,node_tag,node_pairs_start,node_pairs_end, \ - node_style,start_mark,end_mark) \ - (NODE_INIT((node),YAML_MAPPING_NODE,(node_tag),(start_mark),(end_mark)), \ - (node).data.mapping.pairs.start = (node_pairs_start), \ - (node).data.mapping.pairs.end = (node_pairs_end), \ - (node).data.mapping.pairs.top = (node_pairs_start), \ - (node).data.mapping.style = (node_style)) - -#define YAML_VERSION_STRING "0.1.2" -#define YAML_VERSION_MAJOR 0 -#define YAML_VERSION_MINOR 1 -#define YAML_VERSION_PATCH 2 ++#if HAVE_CONFIG_H+#include <config.h>+#endif++#include <yaml.h>++#include <assert.h>+#include <limits.h>++/*+ * Memory management.+ */++YAML_DECLARE(void *)+yaml_malloc(size_t size);++YAML_DECLARE(void *)+yaml_realloc(void *ptr, size_t size);++YAML_DECLARE(void)+yaml_free(void *ptr);++YAML_DECLARE(yaml_char_t *)+yaml_strdup(const yaml_char_t *);++/*+ * Reader: Ensure that the buffer contains at least `length` characters.+ */++YAML_DECLARE(int)+yaml_parser_update_buffer(yaml_parser_t *parser, size_t length);++/*+ * Scanner: Ensure that the token stack contains at least one token ready.+ */++YAML_DECLARE(int)+yaml_parser_fetch_more_tokens(yaml_parser_t *parser);++/*+ * The size of the input raw buffer.+ */++#define INPUT_RAW_BUFFER_SIZE 16384++/*+ * The size of the input buffer.+ *+ * It should be possible to decode the whole raw buffer.+ */++#define INPUT_BUFFER_SIZE (INPUT_RAW_BUFFER_SIZE*3)++/*+ * The size of the output buffer.+ */++#define OUTPUT_BUFFER_SIZE 16384++/*+ * The size of the output raw buffer.+ *+ * It should be possible to encode the whole output buffer.+ */++#define OUTPUT_RAW_BUFFER_SIZE (OUTPUT_BUFFER_SIZE*2+2)++/*+ * The size of other stacks and queues.+ */++#define INITIAL_STACK_SIZE 16+#define INITIAL_QUEUE_SIZE 16+#define INITIAL_STRING_SIZE 16++/*+ * Buffer management.+ */++#define BUFFER_INIT(context,buffer,size) \+ (((buffer).start = yaml_malloc(size)) ? \+ ((buffer).last = (buffer).pointer = (buffer).start, \+ (buffer).end = (buffer).start+(size), \+ 1) : \+ ((context)->error = YAML_MEMORY_ERROR, \+ 0))++#define BUFFER_DEL(context,buffer) \+ (yaml_free((buffer).start), \+ (buffer).start = (buffer).pointer = (buffer).end = 0)++/*+ * String management.+ */++typedef struct {+ yaml_char_t *start;+ yaml_char_t *end;+ yaml_char_t *pointer;+} yaml_string_t;++YAML_DECLARE(int)+yaml_string_extend(yaml_char_t **start,+ yaml_char_t **pointer, yaml_char_t **end);++YAML_DECLARE(int)+yaml_string_join(+ yaml_char_t **a_start, yaml_char_t **a_pointer, yaml_char_t **a_end,+ yaml_char_t **b_start, yaml_char_t **b_pointer, yaml_char_t **b_end);++#define NULL_STRING { NULL, NULL, NULL }++#define STRING(string,length) { (string), (string)+(length), (string) }++#define STRING_INIT(context,string,size) \+ (((string).start = yaml_malloc(size)) ? \+ ((string).pointer = (string).start, \+ (string).end = (string).start+(size), \+ memset((string).start, 0, (size)), \+ 1) : \+ ((context)->error = YAML_MEMORY_ERROR, \+ 0))++#define STRING_DEL(context,string) \+ (yaml_free((string).start), \+ (string).start = (string).pointer = (string).end = 0)++#define STRING_EXTEND(context,string) \+ (((string).pointer+5 < (string).end) \+ || yaml_string_extend(&(string).start, \+ &(string).pointer, &(string).end))++#define CLEAR(context,string) \+ ((string).pointer = (string).start, \+ memset((string).start, 0, (string).end-(string).start))++#define JOIN(context,string_a,string_b) \+ ((yaml_string_join(&(string_a).start, &(string_a).pointer, \+ &(string_a).end, &(string_b).start, \+ &(string_b).pointer, &(string_b).end)) ? \+ ((string_b).pointer = (string_b).start, \+ 1) : \+ ((context)->error = YAML_MEMORY_ERROR, \+ 0))++/*+ * String check operations.+ */++/*+ * Check the octet at the specified position.+ */++#define CHECK_AT(string,octet,offset) \+ ((string).pointer[offset] == (yaml_char_t)(octet))++/*+ * Check the current octet in the buffer.+ */++#define CHECK(string,octet) CHECK_AT((string),(octet),0)++/*+ * Check if the character at the specified position is an alphabetical+ * character, a digit, '_', or '-'.+ */++#define IS_ALPHA_AT(string,offset) \+ (((string).pointer[offset] >= (yaml_char_t) '0' && \+ (string).pointer[offset] <= (yaml_char_t) '9') || \+ ((string).pointer[offset] >= (yaml_char_t) 'A' && \+ (string).pointer[offset] <= (yaml_char_t) 'Z') || \+ ((string).pointer[offset] >= (yaml_char_t) 'a' && \+ (string).pointer[offset] <= (yaml_char_t) 'z') || \+ (string).pointer[offset] == '_' || \+ (string).pointer[offset] == '-')++#define IS_ALPHA(string) IS_ALPHA_AT((string),0)++/*+ * Check if the character at the specified position is a digit.+ */++#define IS_DIGIT_AT(string,offset) \+ (((string).pointer[offset] >= (yaml_char_t) '0' && \+ (string).pointer[offset] <= (yaml_char_t) '9'))++#define IS_DIGIT(string) IS_DIGIT_AT((string),0)++/*+ * Get the value of a digit.+ */++#define AS_DIGIT_AT(string,offset) \+ ((string).pointer[offset] - (yaml_char_t) '0')++#define AS_DIGIT(string) AS_DIGIT_AT((string),0)++/*+ * Check if the character at the specified position is a hex-digit.+ */++#define IS_HEX_AT(string,offset) \+ (((string).pointer[offset] >= (yaml_char_t) '0' && \+ (string).pointer[offset] <= (yaml_char_t) '9') || \+ ((string).pointer[offset] >= (yaml_char_t) 'A' && \+ (string).pointer[offset] <= (yaml_char_t) 'F') || \+ ((string).pointer[offset] >= (yaml_char_t) 'a' && \+ (string).pointer[offset] <= (yaml_char_t) 'f'))++#define IS_HEX(string) IS_HEX_AT((string),0)++/*+ * Get the value of a hex-digit.+ */++#define AS_HEX_AT(string,offset) \+ (((string).pointer[offset] >= (yaml_char_t) 'A' && \+ (string).pointer[offset] <= (yaml_char_t) 'F') ? \+ ((string).pointer[offset] - (yaml_char_t) 'A' + 10) : \+ ((string).pointer[offset] >= (yaml_char_t) 'a' && \+ (string).pointer[offset] <= (yaml_char_t) 'f') ? \+ ((string).pointer[offset] - (yaml_char_t) 'a' + 10) : \+ ((string).pointer[offset] - (yaml_char_t) '0'))+ +#define AS_HEX(string) AS_HEX_AT((string),0)+ +/*+ * Check if the character is ASCII.+ */++#define IS_ASCII_AT(string,offset) \+ ((string).pointer[offset] <= (yaml_char_t) '\x7F')++#define IS_ASCII(string) IS_ASCII_AT((string),0)++/*+ * Check if the character can be printed unescaped.+ */++#define IS_PRINTABLE_AT(string,offset) \+ (((string).pointer[offset] == 0x0A) /* . == #x0A */ \+ || ((string).pointer[offset] >= 0x20 /* #x20 <= . <= #x7E */ \+ && (string).pointer[offset] <= 0x7E) \+ || ((string).pointer[offset] == 0xC2 /* #0xA0 <= . <= #xD7FF */ \+ && (string).pointer[offset+1] >= 0xA0) \+ || ((string).pointer[offset] > 0xC2 \+ && (string).pointer[offset] < 0xED) \+ || ((string).pointer[offset] == 0xED \+ && (string).pointer[offset+1] < 0xA0) \+ || ((string).pointer[offset] == 0xEE) \+ || ((string).pointer[offset] == 0xEF /* #xE000 <= . <= #xFFFD */ \+ && !((string).pointer[offset+1] == 0xBB /* && . != #xFEFF */ \+ && (string).pointer[offset+2] == 0xBF) \+ && !((string).pointer[offset+1] == 0xBF \+ && ((string).pointer[offset+2] == 0xBE \+ || (string).pointer[offset+2] == 0xBF))))++#define IS_PRINTABLE(string) IS_PRINTABLE_AT((string),0)++/*+ * Check if the character at the specified position is NUL.+ */++#define IS_Z_AT(string,offset) CHECK_AT((string),'\0',(offset))++#define IS_Z(string) IS_Z_AT((string),0)++/*+ * Check if the character at the specified position is BOM.+ */++#define IS_BOM_AT(string,offset) \+ (CHECK_AT((string),'\xEF',(offset)) \+ && CHECK_AT((string),'\xBB',(offset)+1) \+ && CHECK_AT((string),'\xBF',(offset)+2)) /* BOM (#xFEFF) */++#define IS_BOM(string) IS_BOM_AT(string,0)++/*+ * Check if the character at the specified position is space.+ */++#define IS_SPACE_AT(string,offset) CHECK_AT((string),' ',(offset))++#define IS_SPACE(string) IS_SPACE_AT((string),0)++/*+ * Check if the character at the specified position is tab.+ */++#define IS_TAB_AT(string,offset) CHECK_AT((string),'\t',(offset))++#define IS_TAB(string) IS_TAB_AT((string),0)++/*+ * Check if the character at the specified position is blank (space or tab).+ */++#define IS_BLANK_AT(string,offset) \+ (IS_SPACE_AT((string),(offset)) || IS_TAB_AT((string),(offset)))++#define IS_BLANK(string) IS_BLANK_AT((string),0)++/*+ * Check if the character at the specified position is a line break.+ */++#define IS_BREAK_AT(string,offset) \+ (CHECK_AT((string),'\r',(offset)) /* CR (#xD)*/ \+ || CHECK_AT((string),'\n',(offset)) /* LF (#xA) */ \+ || (CHECK_AT((string),'\xC2',(offset)) \+ && CHECK_AT((string),'\x85',(offset)+1)) /* NEL (#x85) */ \+ || (CHECK_AT((string),'\xE2',(offset)) \+ && CHECK_AT((string),'\x80',(offset)+1) \+ && CHECK_AT((string),'\xA8',(offset)+2)) /* LS (#x2028) */ \+ || (CHECK_AT((string),'\xE2',(offset)) \+ && CHECK_AT((string),'\x80',(offset)+1) \+ && CHECK_AT((string),'\xA9',(offset)+2))) /* PS (#x2029) */++#define IS_BREAK(string) IS_BREAK_AT((string),0)++#define IS_CRLF_AT(string,offset) \+ (CHECK_AT((string),'\r',(offset)) && CHECK_AT((string),'\n',(offset)+1))++#define IS_CRLF(string) IS_CRLF_AT((string),0)++/*+ * Check if the character is a line break or NUL.+ */++#define IS_BREAKZ_AT(string,offset) \+ (IS_BREAK_AT((string),(offset)) || IS_Z_AT((string),(offset)))++#define IS_BREAKZ(string) IS_BREAKZ_AT((string),0)++/*+ * Check if the character is a line break, space, or NUL.+ */++#define IS_SPACEZ_AT(string,offset) \+ (IS_SPACE_AT((string),(offset)) || IS_BREAKZ_AT((string),(offset)))++#define IS_SPACEZ(string) IS_SPACEZ_AT((string),0)++/*+ * Check if the character is a line break, space, tab, or NUL.+ */++#define IS_BLANKZ_AT(string,offset) \+ (IS_BLANK_AT((string),(offset)) || IS_BREAKZ_AT((string),(offset)))++#define IS_BLANKZ(string) IS_BLANKZ_AT((string),0)++/*+ * Determine the width of the character.+ */++#define WIDTH_AT(string,offset) \+ (((string).pointer[offset] & 0x80) == 0x00 ? 1 : \+ ((string).pointer[offset] & 0xE0) == 0xC0 ? 2 : \+ ((string).pointer[offset] & 0xF0) == 0xE0 ? 3 : \+ ((string).pointer[offset] & 0xF8) == 0xF0 ? 4 : 0)++#define WIDTH(string) WIDTH_AT((string),0)++/*+ * Move the string pointer to the next character.+ */++#define MOVE(string) ((string).pointer += WIDTH((string)))++/*+ * Copy a character and move the pointers of both strings.+ */++#define COPY(string_a,string_b) \+ ((*(string_b).pointer & 0x80) == 0x00 ? \+ (*((string_a).pointer++) = *((string_b).pointer++)) : \+ (*(string_b).pointer & 0xE0) == 0xC0 ? \+ (*((string_a).pointer++) = *((string_b).pointer++), \+ *((string_a).pointer++) = *((string_b).pointer++)) : \+ (*(string_b).pointer & 0xF0) == 0xE0 ? \+ (*((string_a).pointer++) = *((string_b).pointer++), \+ *((string_a).pointer++) = *((string_b).pointer++), \+ *((string_a).pointer++) = *((string_b).pointer++)) : \+ (*(string_b).pointer & 0xF8) == 0xF0 ? \+ (*((string_a).pointer++) = *((string_b).pointer++), \+ *((string_a).pointer++) = *((string_b).pointer++), \+ *((string_a).pointer++) = *((string_b).pointer++), \+ *((string_a).pointer++) = *((string_b).pointer++)) : 0)++/*+ * Stack and queue management.+ */++YAML_DECLARE(int)+yaml_stack_extend(void **start, void **top, void **end);++YAML_DECLARE(int)+yaml_queue_extend(void **start, void **head, void **tail, void **end);++#define STACK_INIT(context,stack,size) \+ (((stack).start = yaml_malloc((size)*sizeof(*(stack).start))) ? \+ ((stack).top = (stack).start, \+ (stack).end = (stack).start+(size), \+ 1) : \+ ((context)->error = YAML_MEMORY_ERROR, \+ 0))++#define STACK_DEL(context,stack) \+ (yaml_free((stack).start), \+ (stack).start = (stack).top = (stack).end = 0)++#define STACK_EMPTY(context,stack) \+ ((stack).start == (stack).top)++#define PUSH(context,stack,value) \+ (((stack).top != (stack).end \+ || yaml_stack_extend((void **)&(stack).start, \+ (void **)&(stack).top, (void **)&(stack).end)) ? \+ (*((stack).top++) = value, \+ 1) : \+ ((context)->error = YAML_MEMORY_ERROR, \+ 0))++#define POP(context,stack) \+ (*(--(stack).top))++#define QUEUE_INIT(context,queue,size) \+ (((queue).start = yaml_malloc((size)*sizeof(*(queue).start))) ? \+ ((queue).head = (queue).tail = (queue).start, \+ (queue).end = (queue).start+(size), \+ 1) : \+ ((context)->error = YAML_MEMORY_ERROR, \+ 0))++#define QUEUE_DEL(context,queue) \+ (yaml_free((queue).start), \+ (queue).start = (queue).head = (queue).tail = (queue).end = 0)++#define QUEUE_EMPTY(context,queue) \+ ((queue).head == (queue).tail)++#define ENQUEUE(context,queue,value) \+ (((queue).tail != (queue).end \+ || yaml_queue_extend((void **)&(queue).start, (void **)&(queue).head, \+ (void **)&(queue).tail, (void **)&(queue).end)) ? \+ (*((queue).tail++) = value, \+ 1) : \+ ((context)->error = YAML_MEMORY_ERROR, \+ 0))++#define DEQUEUE(context,queue) \+ (*((queue).head++))++#define QUEUE_INSERT(context,queue,index,value) \+ (((queue).tail != (queue).end \+ || yaml_queue_extend((void **)&(queue).start, (void **)&(queue).head, \+ (void **)&(queue).tail, (void **)&(queue).end)) ? \+ (memmove((queue).head+(index)+1,(queue).head+(index), \+ ((queue).tail-(queue).head-(index))*sizeof(*(queue).start)), \+ *((queue).head+(index)) = value, \+ (queue).tail++, \+ 1) : \+ ((context)->error = YAML_MEMORY_ERROR, \+ 0))++/*+ * Token initializers.+ */++#define TOKEN_INIT(token,token_type,token_start_mark,token_end_mark) \+ (memset(&(token), 0, sizeof(yaml_token_t)), \+ (token).type = (token_type), \+ (token).start_mark = (token_start_mark), \+ (token).end_mark = (token_end_mark))++#define STREAM_START_TOKEN_INIT(token,token_encoding,start_mark,end_mark) \+ (TOKEN_INIT((token),YAML_STREAM_START_TOKEN,(start_mark),(end_mark)), \+ (token).data.stream_start.encoding = (token_encoding))++#define STREAM_END_TOKEN_INIT(token,start_mark,end_mark) \+ (TOKEN_INIT((token),YAML_STREAM_END_TOKEN,(start_mark),(end_mark)))++#define ALIAS_TOKEN_INIT(token,token_value,start_mark,end_mark) \+ (TOKEN_INIT((token),YAML_ALIAS_TOKEN,(start_mark),(end_mark)), \+ (token).data.alias.value = (token_value))++#define ANCHOR_TOKEN_INIT(token,token_value,start_mark,end_mark) \+ (TOKEN_INIT((token),YAML_ANCHOR_TOKEN,(start_mark),(end_mark)), \+ (token).data.anchor.value = (token_value))++#define TAG_TOKEN_INIT(token,token_handle,token_suffix,start_mark,end_mark) \+ (TOKEN_INIT((token),YAML_TAG_TOKEN,(start_mark),(end_mark)), \+ (token).data.tag.handle = (token_handle), \+ (token).data.tag.suffix = (token_suffix))++#define SCALAR_TOKEN_INIT(token,token_value,token_length,token_style,start_mark,end_mark) \+ (TOKEN_INIT((token),YAML_SCALAR_TOKEN,(start_mark),(end_mark)), \+ (token).data.scalar.value = (token_value), \+ (token).data.scalar.length = (token_length), \+ (token).data.scalar.style = (token_style))++#define VERSION_DIRECTIVE_TOKEN_INIT(token,token_major,token_minor,start_mark,end_mark) \+ (TOKEN_INIT((token),YAML_VERSION_DIRECTIVE_TOKEN,(start_mark),(end_mark)), \+ (token).data.version_directive.major = (token_major), \+ (token).data.version_directive.minor = (token_minor))++#define TAG_DIRECTIVE_TOKEN_INIT(token,token_handle,token_prefix,start_mark,end_mark) \+ (TOKEN_INIT((token),YAML_TAG_DIRECTIVE_TOKEN,(start_mark),(end_mark)), \+ (token).data.tag_directive.handle = (token_handle), \+ (token).data.tag_directive.prefix = (token_prefix))++/*+ * Event initializers.+ */++#define EVENT_INIT(event,event_type,event_start_mark,event_end_mark) \+ (memset(&(event), 0, sizeof(yaml_event_t)), \+ (event).type = (event_type), \+ (event).start_mark = (event_start_mark), \+ (event).end_mark = (event_end_mark))++#define STREAM_START_EVENT_INIT(event,event_encoding,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_STREAM_START_EVENT,(start_mark),(end_mark)), \+ (event).data.stream_start.encoding = (event_encoding))++#define STREAM_END_EVENT_INIT(event,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_STREAM_END_EVENT,(start_mark),(end_mark)))++#define DOCUMENT_START_EVENT_INIT(event,event_version_directive, \+ event_tag_directives_start,event_tag_directives_end,event_implicit,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_DOCUMENT_START_EVENT,(start_mark),(end_mark)), \+ (event).data.document_start.version_directive = (event_version_directive), \+ (event).data.document_start.tag_directives.start = (event_tag_directives_start), \+ (event).data.document_start.tag_directives.end = (event_tag_directives_end), \+ (event).data.document_start.implicit = (event_implicit))++#define DOCUMENT_END_EVENT_INIT(event,event_implicit,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_DOCUMENT_END_EVENT,(start_mark),(end_mark)), \+ (event).data.document_end.implicit = (event_implicit))++#define ALIAS_EVENT_INIT(event,event_anchor,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_ALIAS_EVENT,(start_mark),(end_mark)), \+ (event).data.alias.anchor = (event_anchor))++#define SCALAR_EVENT_INIT(event,event_anchor,event_tag,event_value,event_length, \+ event_plain_implicit, event_quoted_implicit,event_style,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_SCALAR_EVENT,(start_mark),(end_mark)), \+ (event).data.scalar.anchor = (event_anchor), \+ (event).data.scalar.tag = (event_tag), \+ (event).data.scalar.value = (event_value), \+ (event).data.scalar.length = (event_length), \+ (event).data.scalar.plain_implicit = (event_plain_implicit), \+ (event).data.scalar.quoted_implicit = (event_quoted_implicit), \+ (event).data.scalar.style = (event_style))++#define SEQUENCE_START_EVENT_INIT(event,event_anchor,event_tag, \+ event_implicit,event_style,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_SEQUENCE_START_EVENT,(start_mark),(end_mark)), \+ (event).data.sequence_start.anchor = (event_anchor), \+ (event).data.sequence_start.tag = (event_tag), \+ (event).data.sequence_start.implicit = (event_implicit), \+ (event).data.sequence_start.style = (event_style))++#define SEQUENCE_END_EVENT_INIT(event,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_SEQUENCE_END_EVENT,(start_mark),(end_mark)))++#define MAPPING_START_EVENT_INIT(event,event_anchor,event_tag, \+ event_implicit,event_style,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_MAPPING_START_EVENT,(start_mark),(end_mark)), \+ (event).data.mapping_start.anchor = (event_anchor), \+ (event).data.mapping_start.tag = (event_tag), \+ (event).data.mapping_start.implicit = (event_implicit), \+ (event).data.mapping_start.style = (event_style))++#define MAPPING_END_EVENT_INIT(event,start_mark,end_mark) \+ (EVENT_INIT((event),YAML_MAPPING_END_EVENT,(start_mark),(end_mark)))++/*+ * Document initializer.+ */++#define DOCUMENT_INIT(document,document_nodes_start,document_nodes_end, \+ document_version_directive,document_tag_directives_start, \+ document_tag_directives_end,document_start_implicit, \+ document_end_implicit,document_start_mark,document_end_mark) \+ (memset(&(document), 0, sizeof(yaml_document_t)), \+ (document).nodes.start = (document_nodes_start), \+ (document).nodes.end = (document_nodes_end), \+ (document).nodes.top = (document_nodes_start), \+ (document).version_directive = (document_version_directive), \+ (document).tag_directives.start = (document_tag_directives_start), \+ (document).tag_directives.end = (document_tag_directives_end), \+ (document).start_implicit = (document_start_implicit), \+ (document).end_implicit = (document_end_implicit), \+ (document).start_mark = (document_start_mark), \+ (document).end_mark = (document_end_mark))++/*+ * Node initializers.+ */++#define NODE_INIT(node,node_type,node_tag,node_start_mark,node_end_mark) \+ (memset(&(node), 0, sizeof(yaml_node_t)), \+ (node).type = (node_type), \+ (node).tag = (node_tag), \+ (node).start_mark = (node_start_mark), \+ (node).end_mark = (node_end_mark))++#define SCALAR_NODE_INIT(node,node_tag,node_value,node_length, \+ node_style,start_mark,end_mark) \+ (NODE_INIT((node),YAML_SCALAR_NODE,(node_tag),(start_mark),(end_mark)), \+ (node).data.scalar.value = (node_value), \+ (node).data.scalar.length = (node_length), \+ (node).data.scalar.style = (node_style))++#define SEQUENCE_NODE_INIT(node,node_tag,node_items_start,node_items_end, \+ node_style,start_mark,end_mark) \+ (NODE_INIT((node),YAML_SEQUENCE_NODE,(node_tag),(start_mark),(end_mark)), \+ (node).data.sequence.items.start = (node_items_start), \+ (node).data.sequence.items.end = (node_items_end), \+ (node).data.sequence.items.top = (node_items_start), \+ (node).data.sequence.style = (node_style))++#define MAPPING_NODE_INIT(node,node_tag,node_pairs_start,node_pairs_end, \+ node_style,start_mark,end_mark) \+ (NODE_INIT((node),YAML_MAPPING_NODE,(node_tag),(start_mark),(end_mark)), \+ (node).data.mapping.pairs.start = (node_pairs_start), \+ (node).data.mapping.pairs.end = (node_pairs_end), \+ (node).data.mapping.pairs.top = (node_pairs_start), \+ (node).data.mapping.style = (node_style))++#define YAML_VERSION_STRING "0.1.2"+#define YAML_VERSION_MAJOR 0+#define YAML_VERSION_MINOR 1+#define YAML_VERSION_PATCH 2
test/largest-string.yaml view
@@ -1,6 +1,6 @@-this is a long string: but this one is even longer -this is shorter: - - many - - tiny - - string -one the other hand: this one is just a little bit bigger than the others +this is a long string: but this one is even longer+this is shorter:+ - many+ - tiny+ - string+one the other hand: this one is just a little bit bigger than the others
test/main.hs view
@@ -1,310 +1,324 @@-{-# LANGUAGE CPP #-} -{-# LANGUAGE PackageImports #-} -{-# LANGUAGE ScopedTypeVariables #-} -{-# LANGUAGE OverloadedStrings #-} - -import qualified Text.Libyaml as Y -import qualified Data.ByteString.Char8 as B8 - -import Test.HUnit hiding (Test, path) - -import qualified Data.Conduit as C -import qualified Data.Conduit.List as CL - -import System.Directory -import Control.Monad -import Control.Exception (try, SomeException) -import Test.Hspec.Monadic -import Test.Hspec.HUnit () - -import qualified Data.Yaml as D -import Data.Yaml (object, array) -import Data.Maybe -import qualified Data.HashMap.Strict as M -import qualified Data.Text as T - -main :: IO () -main = hspecX $ do - describe "streaming" $ do - it "count scalars with anchor" caseCountScalarsWithAnchor - it "count sequences with anchor" caseCountSequencesWithAnchor - it "count mappings with anchor" caseCountMappingsWithAnchor - it "count aliases" caseCountAliases - it "count scalars" caseCountScalars - it "largest string" caseLargestString - it "encode/decode" caseEncodeDecode - it "encode/decode file" caseEncodeDecodeFile - it "interleaved encode/decode" caseInterleave - it "decode invalid document (without segfault)" caseDecodeInvalidDocument - describe "Data.Yaml" $ do - it "encode/decode" caseEncodeDecodeData - it "encode/decode file" caseEncodeDecodeFileData - it "encode/decode strings" caseEncodeDecodeStrings - it "decode invalid file" caseDecodeInvalid - it "processes datatypes" caseDataTypes - describe "Data.Yaml aliases" $ do - it "simple scalar alias" caseSimpleScalarAlias - it "simple sequence alias" caseSimpleSequenceAlias - it "simple mapping alias" caseSimpleMappingAlias - it "mapping alias before anchor" caseMappingAliasBeforeAnchor - it "mapping alias inside anchor" caseMappingAliasInsideAnchor - it "scalar alias overriding" caseScalarAliasOverriding - describe "Data.Yaml merge keys" $ do - it "test uniqueness of keys" caseAllKeysShouldBeUnique - it "test mapping merge" caseSimpleMappingMerge - it "test sequence of mappings merging" caseMergeSequence - describe "numbers" $ do - it "parses as string when quoted" caseQuotedNumber - it "parses as number when unquoted" caseUnquotedNumber - -counter :: Monad m => (Y.Event -> Bool) -> C.Sink Y.Event m Int -counter pred' = - CL.fold (\cnt e -> (if pred' e then 1 else 0) + cnt) 0 - -caseHelper :: String - -> (Y.Event -> Bool) - -> Int - -> Assertion -caseHelper yamlString pred' expRes = do - res <- C.runResourceT $ Y.decode (B8.pack yamlString) C.$$ counter pred' - res @?= expRes - -caseCountScalarsWithAnchor :: Assertion -caseCountScalarsWithAnchor = - caseHelper yamlString isScalarA 1 - where - yamlString = "foo:\n - &anchor bin1\n - bin2\n - bin3" - isScalarA (Y.EventScalar _ _ _ (Just _)) = True - isScalarA _ = False - -caseCountSequencesWithAnchor :: Assertion -caseCountSequencesWithAnchor = - caseHelper yamlString isSequenceStartA 1 - where - yamlString = "foo: &anchor\n - bin1\n - bin2\n - bin3" - isSequenceStartA (Y.EventSequenceStart (Just _)) = True - isSequenceStartA _ = False - -caseCountMappingsWithAnchor :: Assertion -caseCountMappingsWithAnchor = - caseHelper yamlString isMappingA 1 - where - yamlString = "foo: &anchor\n key1: bin1\n key2: bin2\n key3: bin3" - isMappingA (Y.EventMappingStart (Just _)) = True - isMappingA _ = False - -caseCountAliases :: Assertion -caseCountAliases = - caseHelper yamlString isAlias 1 - where - yamlString = "foo: &anchor\n key1: bin1\n key2: bin2\n key3: bin3\nboo: *anchor" - isAlias Y.EventAlias{} = True - isAlias _ = False - -caseCountScalars :: Assertion -caseCountScalars = do - res <- C.runResourceT $ Y.decode yamlBS C.$$ CL.fold adder accum - res @?= (7, 1, 2) - where - yamlString = "foo:\n baz: [bin1, bin2, bin3]\nbaz: bazval" - yamlBS = B8.pack yamlString - adder (s, l, m) (Y.EventScalar{}) = (s + 1, l, m) - adder (s, l, m) (Y.EventSequenceStart{}) = (s, l + 1, m) - adder (s, l, m) (Y.EventMappingStart{}) = (s, l, m + 1) - adder a _ = a - accum = (0, 0, 0) :: (Int, Int, Int) - -caseLargestString :: Assertion -caseLargestString = do - res <- C.runResourceT $ Y.decodeFile filePath C.$$ CL.fold adder accum - res @?= (length expected, expected) - where - expected = "this one is just a little bit bigger than the others" - filePath = "test/largest-string.yaml" - adder (i, s) (Y.EventScalar bs _ _ _) = - let s' = B8.unpack bs - i' = length s' - in if i' > i then (i', s') else (i, s) - adder acc _ = acc - accum = (0, "no strings found") - -newtype MyEvent = MyEvent Y.Event deriving Show -instance Eq MyEvent where - (MyEvent (Y.EventScalar s t _ _)) == (MyEvent (Y.EventScalar s' t' _ _)) = - s == s' && t == t' - MyEvent e1 == MyEvent e2 = e1 == e2 - -caseEncodeDecode :: Assertion -caseEncodeDecode = do - eList <- C.runResourceT $ Y.decode yamlBS C.$$ CL.consume - bs <- C.runResourceT $ CL.sourceList eList C.$$ Y.encode - eList2 <- C.runResourceT $ Y.decode bs C.$$ CL.consume - map MyEvent eList @=? map MyEvent eList2 - where - yamlString = "foo: bar\nbaz:\n - bin1\n - bin2\n" - yamlBS = B8.pack yamlString - -removeFile' :: FilePath -> IO () -removeFile' fp = do - x <- doesFileExist fp - when x $ removeFile fp - -caseEncodeDecodeFile :: Assertion -caseEncodeDecodeFile = do - removeFile' tmpPath - eList <- C.runResourceT $ Y.decodeFile filePath C.$$ CL.consume - C.runResourceT $ CL.sourceList eList C.$$ Y.encodeFile tmpPath - eList2 <- C.runResourceT $ Y.decodeFile filePath C.$$ CL.consume - map MyEvent eList @=? map MyEvent eList2 - where - filePath = "test/largest-string.yaml" - tmpPath = "tmp.yaml" - -caseInterleave :: Assertion -caseInterleave = do - removeFile' tmpPath - removeFile' tmpPath2 - () <- C.runResourceT $ Y.decodeFile filePath C.$$ Y.encodeFile tmpPath - () <- C.runResourceT $ Y.decodeFile tmpPath C.$$ Y.encodeFile tmpPath2 - f1 <- readFile tmpPath - f2 <- readFile tmpPath2 - f1 @=? f2 - where - filePath = "test/largest-string.yaml" - tmpPath = "tmp.yaml" - tmpPath2 = "tmp2.yaml" - -caseDecodeInvalidDocument :: Assertion -caseDecodeInvalidDocument = do - x <- try $ C.runResourceT $ Y.decode yamlBS C.$$ CL.sinkNull - case x of - Left (_ :: SomeException) -> return () - Right y -> do - putStrLn $ "bad return value: " ++ show y - assertFailure "expected parsing exception, but got no errors" - where - yamlString = " - foo\n - baz\nbuz" - yamlBS = B8.pack yamlString - -mkScalar :: String -> D.Value -mkScalar = mkStrScalar - -mkStrScalar :: String -> D.Value -mkStrScalar = D.String . T.pack - -mappingKey :: D.Value-> String -> D.Value -mappingKey (D.Object m) k = (fromJust . M.lookup (T.pack k) $ m) -mappingKey _ _ = error "expected Object" - -decodeYaml :: String -> Maybe D.Value -decodeYaml s = D.decode $ B8.pack s - -sample :: D.Value -sample = array - [ D.String "foo" - , object - [ ("bar1", D.String "bar2") - ] - ] - -caseEncodeDecodeData :: Assertion -caseEncodeDecodeData = do - let out = D.decode $ D.encode sample - out @?= Just sample - -caseEncodeDecodeFileData :: Assertion -caseEncodeDecodeFileData = do - let fp = "tmp.yaml" - D.encodeFile fp sample - out <- D.decodeFile fp - out @?= Just sample - -caseEncodeDecodeStrings :: Assertion -caseEncodeDecodeStrings = do - let out = D.decode $ D.encode sample - out @?= Just sample - -caseDecodeInvalid :: Assertion -caseDecodeInvalid = do - let invalid = B8.pack "\tthis is 'not' valid :-)" - Nothing @=? (D.decode invalid :: Maybe D.Value) - -caseSimpleScalarAlias :: Assertion -caseSimpleScalarAlias = do - let maybeRes = decodeYaml "- &anch foo\n- baz\n- *anch" - isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing" - let res = fromJust maybeRes - res @?= array [(mkScalar "foo"), (mkScalar "baz"), (mkScalar "foo")] - -caseSimpleSequenceAlias :: Assertion -caseSimpleSequenceAlias = do - let maybeRes = decodeYaml "seq: &anch\n - foo\n - baz\nseq2: *anch" - isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing" - let res = fromJust maybeRes - res @?= object [("seq", array [(mkScalar "foo"), (mkScalar "baz")]), ("seq2", array [(mkScalar "foo"), (mkScalar "baz")])] - -caseSimpleMappingAlias :: Assertion -caseSimpleMappingAlias = do - let maybeRes = decodeYaml "map: &anch\n key1: foo\n key2: baz\nmap2: *anch" - isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing" - let res = fromJust maybeRes - res @?= object [(T.pack "map", object [("key1", mkScalar "foo"), ("key2", (mkScalar "baz"))]), (T.pack "map2", object [("key1", (mkScalar "foo")), ("key2", mkScalar "baz")])] - -caseMappingAliasBeforeAnchor :: Assertion -caseMappingAliasBeforeAnchor = do - let res = decodeYaml "map: *anch\nmap2: &anch\n key1: foo\n key2: baz" - isNothing res @? "decode should return Nothing due to unknown alias" - -caseMappingAliasInsideAnchor :: Assertion -caseMappingAliasInsideAnchor = do - let res = decodeYaml "map: &anch\n key1: foo\n key2: *anch" - isNothing res @? "decode should return Nothing due to unknown alias" - -caseScalarAliasOverriding :: Assertion -caseScalarAliasOverriding = do - let maybeRes = decodeYaml "- &anch foo\n- baz\n- *anch\n- &anch boo\n- buz\n- *anch" - isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing" - let res = fromJust maybeRes - res @?= array [(mkScalar "foo"), (mkScalar "baz"), (mkScalar "foo"), (mkScalar "boo"), (mkScalar "buz"), (mkScalar "boo")] - -caseAllKeysShouldBeUnique :: Assertion -caseAllKeysShouldBeUnique = do - let maybeRes = decodeYaml "foo1: foo\nfoo2: baz\nfoo1: buz" - isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing" - let res = fromJust maybeRes - mappingKey res "foo1" @?= (mkScalar "buz") - -caseSimpleMappingMerge :: Assertion -caseSimpleMappingMerge = do - let maybeRes = decodeYaml "foo1: foo\nfoo2: baz\n<<:\n foo1: buz\n foo3: fuz" - isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing" - let res = fromJust maybeRes - mappingKey res "foo1" @?= (mkScalar "foo") - mappingKey res "foo3" @?= (mkScalar "fuz") - -caseMergeSequence :: Assertion -caseMergeSequence = do - let maybeRes = decodeYaml "m1: &m1\n k1: !!str 1\n k2: !!str 2\nm2: &m2\n k1: !!str 3\n k3: !!str 4\nfoo1: foo\n<<: [ *m1, *m2 ]" - isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing" - let res = fromJust maybeRes - mappingKey res "foo1" @?= (mkScalar "foo") - mappingKey res "k1" @?= (D.Number 1) - mappingKey res "k2" @?= (D.Number 2) - mappingKey res "k3" @?= (D.Number 4) - -caseDataTypes :: Assertion -caseDataTypes = - D.decode (D.encode val) @?= Just val - where - val = object - [ ("string", D.String "foo") - , ("int", D.Number 5) - , ("float", D.Number 4.3) - , ("true", D.Bool True) - , ("false", D.Bool False) - , ("null", D.Null) - ] - -caseQuotedNumber, caseUnquotedNumber :: Assertion -caseQuotedNumber = D.decode "foo: \"1234\"" @?= Just (object [("foo", D.String "1234")]) -caseUnquotedNumber = D.decode "foo: 1234" @?= Just (object [("foo", D.Number 1234)]) +{-# LANGUAGE CPP #-}+{-# LANGUAGE PackageImports #-}+{-# LANGUAGE ScopedTypeVariables #-}+{-# LANGUAGE OverloadedStrings #-}++import qualified Text.Libyaml as Y+import qualified Data.ByteString.Char8 as B8++import Test.HUnit hiding (Test, path)++import qualified Data.Conduit as C+import qualified Data.Conduit.List as CL++import System.Directory+import Control.Monad+import Control.Exception (try, SomeException)+import Test.Hspec.Monadic+import Test.Hspec.HUnit ()++import qualified Data.Yaml as D+import Data.Yaml (object, array)+import Data.Maybe+import qualified Data.HashMap.Strict as M+import qualified Data.Text as T++main :: IO ()+main = hspecX $ do+ describe "streaming" $ do+ it "count scalars with anchor" caseCountScalarsWithAnchor+ it "count sequences with anchor" caseCountSequencesWithAnchor+ it "count mappings with anchor" caseCountMappingsWithAnchor+ it "count aliases" caseCountAliases+ it "count scalars" caseCountScalars+ it "largest string" caseLargestString+ it "encode/decode" caseEncodeDecode+ it "encode/decode file" caseEncodeDecodeFile+ it "interleaved encode/decode" caseInterleave+ it "decode invalid document (without segfault)" caseDecodeInvalidDocument+ describe "Data.Yaml" $ do+ it "encode/decode" caseEncodeDecodeData+ it "encode/decode file" caseEncodeDecodeFileData+ it "encode/decode strings" caseEncodeDecodeStrings+ it "decode invalid file" caseDecodeInvalid+ it "processes datatypes" caseDataTypes+ describe "Data.Yaml aliases" $ do+ it "simple scalar alias" caseSimpleScalarAlias+ it "simple sequence alias" caseSimpleSequenceAlias+ it "simple mapping alias" caseSimpleMappingAlias+ it "mapping alias before anchor" caseMappingAliasBeforeAnchor+ it "mapping alias inside anchor" caseMappingAliasInsideAnchor+ it "scalar alias overriding" caseScalarAliasOverriding+ describe "Data.Yaml merge keys" $ do+ it "test uniqueness of keys" caseAllKeysShouldBeUnique+ it "test mapping merge" caseSimpleMappingMerge+ it "test sequence of mappings merging" caseMergeSequence+ describe "numbers" $ do+ it "parses as string when quoted" caseQuotedNumber+ it "parses as number when unquoted" caseUnquotedNumber+ it "parses as number !!str is present" caseAttribNumber+ describe "booleans" $ do+ it "parses when all lowercase" caseLowercaseBool+ it "parses when all uppercase" caseUppercaseBool+ it "parses when titlecase" caseTitlecaseBool++counter :: Monad m => (Y.Event -> Bool) -> C.Sink Y.Event m Int+counter pred' =+ CL.fold (\cnt e -> (if pred' e then 1 else 0) + cnt) 0++caseHelper :: String+ -> (Y.Event -> Bool)+ -> Int+ -> Assertion+caseHelper yamlString pred' expRes = do+ res <- C.runResourceT $ Y.decode (B8.pack yamlString) C.$$ counter pred'+ res @?= expRes++caseCountScalarsWithAnchor :: Assertion+caseCountScalarsWithAnchor =+ caseHelper yamlString isScalarA 1+ where+ yamlString = "foo:\n - &anchor bin1\n - bin2\n - bin3"+ isScalarA (Y.EventScalar _ _ _ (Just _)) = True+ isScalarA _ = False++caseCountSequencesWithAnchor :: Assertion+caseCountSequencesWithAnchor =+ caseHelper yamlString isSequenceStartA 1+ where+ yamlString = "foo: &anchor\n - bin1\n - bin2\n - bin3"+ isSequenceStartA (Y.EventSequenceStart (Just _)) = True+ isSequenceStartA _ = False++caseCountMappingsWithAnchor :: Assertion+caseCountMappingsWithAnchor =+ caseHelper yamlString isMappingA 1+ where+ yamlString = "foo: &anchor\n key1: bin1\n key2: bin2\n key3: bin3"+ isMappingA (Y.EventMappingStart (Just _)) = True+ isMappingA _ = False++caseCountAliases :: Assertion+caseCountAliases =+ caseHelper yamlString isAlias 1+ where+ yamlString = "foo: &anchor\n key1: bin1\n key2: bin2\n key3: bin3\nboo: *anchor"+ isAlias Y.EventAlias{} = True+ isAlias _ = False++caseCountScalars :: Assertion+caseCountScalars = do+ res <- C.runResourceT $ Y.decode yamlBS C.$$ CL.fold adder accum+ res @?= (7, 1, 2)+ where+ yamlString = "foo:\n baz: [bin1, bin2, bin3]\nbaz: bazval"+ yamlBS = B8.pack yamlString+ adder (s, l, m) (Y.EventScalar{}) = (s + 1, l, m)+ adder (s, l, m) (Y.EventSequenceStart{}) = (s, l + 1, m)+ adder (s, l, m) (Y.EventMappingStart{}) = (s, l, m + 1)+ adder a _ = a+ accum = (0, 0, 0) :: (Int, Int, Int)++caseLargestString :: Assertion+caseLargestString = do+ res <- C.runResourceT $ Y.decodeFile filePath C.$$ CL.fold adder accum+ res @?= (length expected, expected)+ where+ expected = "this one is just a little bit bigger than the others"+ filePath = "test/largest-string.yaml"+ adder (i, s) (Y.EventScalar bs _ _ _) =+ let s' = B8.unpack bs+ i' = length s'+ in if i' > i then (i', s') else (i, s)+ adder acc _ = acc+ accum = (0, "no strings found")++newtype MyEvent = MyEvent Y.Event deriving Show+instance Eq MyEvent where+ (MyEvent (Y.EventScalar s t _ _)) == (MyEvent (Y.EventScalar s' t' _ _)) =+ s == s' && t == t'+ MyEvent e1 == MyEvent e2 = e1 == e2++caseEncodeDecode :: Assertion+caseEncodeDecode = do+ eList <- C.runResourceT $ Y.decode yamlBS C.$$ CL.consume+ bs <- C.runResourceT $ CL.sourceList eList C.$$ Y.encode+ eList2 <- C.runResourceT $ Y.decode bs C.$$ CL.consume+ map MyEvent eList @=? map MyEvent eList2+ where+ yamlString = "foo: bar\nbaz:\n - bin1\n - bin2\n"+ yamlBS = B8.pack yamlString++removeFile' :: FilePath -> IO ()+removeFile' fp = do+ x <- doesFileExist fp+ when x $ removeFile fp++caseEncodeDecodeFile :: Assertion+caseEncodeDecodeFile = do+ removeFile' tmpPath+ eList <- C.runResourceT $ Y.decodeFile filePath C.$$ CL.consume+ C.runResourceT $ CL.sourceList eList C.$$ Y.encodeFile tmpPath+ eList2 <- C.runResourceT $ Y.decodeFile filePath C.$$ CL.consume+ map MyEvent eList @=? map MyEvent eList2+ where+ filePath = "test/largest-string.yaml"+ tmpPath = "tmp.yaml"++caseInterleave :: Assertion+caseInterleave = do+ removeFile' tmpPath+ removeFile' tmpPath2+ () <- C.runResourceT $ Y.decodeFile filePath C.$$ Y.encodeFile tmpPath+ () <- C.runResourceT $ Y.decodeFile tmpPath C.$$ Y.encodeFile tmpPath2+ f1 <- readFile tmpPath+ f2 <- readFile tmpPath2+ f1 @=? f2+ where+ filePath = "test/largest-string.yaml"+ tmpPath = "tmp.yaml"+ tmpPath2 = "tmp2.yaml"++caseDecodeInvalidDocument :: Assertion+caseDecodeInvalidDocument = do+ x <- try $ C.runResourceT $ Y.decode yamlBS C.$$ CL.sinkNull+ case x of+ Left (_ :: SomeException) -> return ()+ Right y -> do+ putStrLn $ "bad return value: " ++ show y+ assertFailure "expected parsing exception, but got no errors"+ where+ yamlString = " - foo\n - baz\nbuz"+ yamlBS = B8.pack yamlString++mkScalar :: String -> D.Value+mkScalar = mkStrScalar++mkStrScalar :: String -> D.Value+mkStrScalar = D.String . T.pack++mappingKey :: D.Value-> String -> D.Value+mappingKey (D.Object m) k = (fromJust . M.lookup (T.pack k) $ m)+mappingKey _ _ = error "expected Object"++decodeYaml :: String -> Maybe D.Value+decodeYaml s = D.decode $ B8.pack s++sample :: D.Value+sample = array+ [ D.String "foo"+ , object+ [ ("bar1", D.String "bar2")+ ]+ ]++caseEncodeDecodeData :: Assertion+caseEncodeDecodeData = do+ let out = D.decode $ D.encode sample+ out @?= Just sample++caseEncodeDecodeFileData :: Assertion+caseEncodeDecodeFileData = do+ let fp = "tmp.yaml"+ D.encodeFile fp sample+ out <- D.decodeFile fp+ out @?= Just sample++caseEncodeDecodeStrings :: Assertion+caseEncodeDecodeStrings = do+ let out = D.decode $ D.encode sample+ out @?= Just sample++caseDecodeInvalid :: Assertion+caseDecodeInvalid = do+ let invalid = B8.pack "\tthis is 'not' valid :-)"+ Nothing @=? (D.decode invalid :: Maybe D.Value)++caseSimpleScalarAlias :: Assertion+caseSimpleScalarAlias = do+ let maybeRes = decodeYaml "- &anch foo\n- baz\n- *anch"+ isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing"+ let res = fromJust maybeRes+ res @?= array [(mkScalar "foo"), (mkScalar "baz"), (mkScalar "foo")]++caseSimpleSequenceAlias :: Assertion+caseSimpleSequenceAlias = do+ let maybeRes = decodeYaml "seq: &anch\n - foo\n - baz\nseq2: *anch"+ isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing"+ let res = fromJust maybeRes+ res @?= object [("seq", array [(mkScalar "foo"), (mkScalar "baz")]), ("seq2", array [(mkScalar "foo"), (mkScalar "baz")])]++caseSimpleMappingAlias :: Assertion+caseSimpleMappingAlias = do+ let maybeRes = decodeYaml "map: &anch\n key1: foo\n key2: baz\nmap2: *anch"+ isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing"+ let res = fromJust maybeRes+ res @?= object [(T.pack "map", object [("key1", mkScalar "foo"), ("key2", (mkScalar "baz"))]), (T.pack "map2", object [("key1", (mkScalar "foo")), ("key2", mkScalar "baz")])]++caseMappingAliasBeforeAnchor :: Assertion+caseMappingAliasBeforeAnchor = do+ let res = decodeYaml "map: *anch\nmap2: &anch\n key1: foo\n key2: baz"+ isNothing res @? "decode should return Nothing due to unknown alias"++caseMappingAliasInsideAnchor :: Assertion+caseMappingAliasInsideAnchor = do+ let res = decodeYaml "map: &anch\n key1: foo\n key2: *anch"+ isNothing res @? "decode should return Nothing due to unknown alias"++caseScalarAliasOverriding :: Assertion+caseScalarAliasOverriding = do+ let maybeRes = decodeYaml "- &anch foo\n- baz\n- *anch\n- &anch boo\n- buz\n- *anch"+ isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing"+ let res = fromJust maybeRes+ res @?= array [(mkScalar "foo"), (mkScalar "baz"), (mkScalar "foo"), (mkScalar "boo"), (mkScalar "buz"), (mkScalar "boo")]++caseAllKeysShouldBeUnique :: Assertion+caseAllKeysShouldBeUnique = do+ let maybeRes = decodeYaml "foo1: foo\nfoo2: baz\nfoo1: buz"+ isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing"+ let res = fromJust maybeRes+ mappingKey res "foo1" @?= (mkScalar "buz")++caseSimpleMappingMerge :: Assertion+caseSimpleMappingMerge = do+ let maybeRes = decodeYaml "foo1: foo\nfoo2: baz\n<<:\n foo1: buz\n foo3: fuz"+ isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing"+ let res = fromJust maybeRes+ mappingKey res "foo1" @?= (mkScalar "foo")+ mappingKey res "foo3" @?= (mkScalar "fuz")++caseMergeSequence :: Assertion+caseMergeSequence = do+ let maybeRes = decodeYaml "m1: &m1\n k1: !!str 1\n k2: !!str 2\nm2: &m2\n k1: !!str 3\n k3: !!str 4\nfoo1: foo\n<<: [ *m1, *m2 ]"+ isJust maybeRes @? "decoder should return Just YamlObject but returned Nothing"+ let res = fromJust maybeRes+ mappingKey res "foo1" @?= (mkScalar "foo")+ mappingKey res "k1" @?= (D.String "1")+ mappingKey res "k2" @?= (D.String "2")+ mappingKey res "k3" @?= (D.String "4")++caseDataTypes :: Assertion+caseDataTypes =+ D.decode (D.encode val) @?= Just val+ where+ val = object+ [ ("string", D.String "foo")+ , ("int", D.Number 5)+ , ("float", D.Number 4.3)+ , ("true", D.Bool True)+ , ("false", D.Bool False)+ , ("null", D.Null)+ ]++caseQuotedNumber, caseUnquotedNumber, caseAttribNumber :: Assertion+caseQuotedNumber = D.decode "foo: \"1234\"" @?= Just (object [("foo", D.String "1234")])+caseUnquotedNumber = D.decode "foo: 1234" @?= Just (object [("foo", D.Number 1234)])+caseAttribNumber = D.decode "foo: !!str 1234" @?= Just (object [("foo", D.String "1234")])++obj :: Maybe D.Value+obj = Just (object [("foo", D.Bool False), ("bar", D.Bool True), ("baz", D.Bool True)])++caseLowercaseBool, caseUppercaseBool, caseTitlecaseBool :: Assertion+caseLowercaseBool = D.decode "foo: off\nbar: y\nbaz: true" @?= obj+caseUppercaseBool = D.decode "foo: FALSE\nbar: Y\nbaz: ON" @?= obj+caseTitlecaseBool = D.decode "foo: No\nbar: Yes\nbaz: True" @?= obj
yaml.cabal view
@@ -1,78 +1,78 @@-name: yaml -version: 0.7.0.2 -license: BSD3 -license-file: LICENSE -author: Michael Snoyman <michael@snoyman.com>, Anton Ageev <antage@gmail.com>,Kirill Simonov -maintainer: Michael Snoyman <michael@snoyman.com> -synopsis: Low-level binding to the libyaml C library. -description: Provides support for parsing and emitting Yaml documents. - . - This package includes the full libyaml C library version 0.1.2 by Kirill - Simonov (<http://pyyaml.org/wiki/LibYAML>) in the package so you - don't need to worry about any non-Haskell dependencies. -category: Web -stability: unstable -cabal-version: >= 1.8 -build-type: Simple -homepage: http://github.com/snoyberg/yaml/ -extra-source-files: c/helper.h, - libyaml/yaml_private.h, - libyaml/yaml.h, - libyaml/LICENSE - test/main.hs - test/largest-string.yaml - -flag system-libyaml - description: Use the system-wide libyaml instead of the bundled copy - default: False - -library - build-depends: base >= 4 && < 5 - , transformers >= 0.1 && < 0.4 - , bytestring >= 0.9.1.4 && < 0.10 - , conduit >= 0.4 && < 0.5 - , resourcet >= 0.3 && < 0.4 - , aeson >= 0.5 - , containers - , unordered-containers - , vector - , text - , attoparsec - exposed-modules: Text.Libyaml - Data.Yaml - ghc-options: -Wall - c-sources: c/helper.c - include-dirs: c - if flag(system-libyaml) - pkgconfig-depends: yaml-0.1 - else - c-sources: libyaml/api.c, - libyaml/dumper.c, - libyaml/emitter.c, - libyaml/loader.c, - libyaml/parser.c, - libyaml/reader.c, - libyaml/scanner.c, - libyaml/writer.c - include-dirs: libyaml - -test-suite test - type: exitcode-stdio-1.0 - hs-source-dirs: test - main-is: main.hs - cpp-options: -DTEST - build-depends: hspec - , HUnit - , directory - , base >= 4 && < 5 - , transformers >= 0.1 && < 0.4 - , bytestring >= 0.9.1.4 && < 0.10 - , conduit - , yaml - , text - , unordered-containers - ghc-options: -Wall - -source-repository head - type: git - location: https://github.com/snoyberg/yaml +name: yaml+version: 0.7.0.3+license: BSD3+license-file: LICENSE+author: Michael Snoyman <michael@snoyman.com>, Anton Ageev <antage@gmail.com>,Kirill Simonov +maintainer: Michael Snoyman <michael@snoyman.com>+synopsis: Low-level binding to the libyaml C library.+description: Provides support for parsing and emitting Yaml documents.+ .+ This package includes the full libyaml C library version 0.1.2 by Kirill+ Simonov (<http://pyyaml.org/wiki/LibYAML>) in the package so you+ don't need to worry about any non-Haskell dependencies.+category: Web+stability: unstable+cabal-version: >= 1.8+build-type: Simple+homepage: http://github.com/snoyberg/yaml/+extra-source-files: c/helper.h,+ libyaml/yaml_private.h,+ libyaml/yaml.h,+ libyaml/LICENSE+ test/main.hs+ test/largest-string.yaml++flag system-libyaml+ description: Use the system-wide libyaml instead of the bundled copy+ default: False++library+ build-depends: base >= 4 && < 5+ , transformers >= 0.1 && < 0.4+ , bytestring >= 0.9.1.4 && < 0.10+ , conduit >= 0.4 && < 0.5+ , resourcet >= 0.3 && < 0.4+ , aeson >= 0.5+ , containers+ , unordered-containers+ , vector+ , text+ , attoparsec+ exposed-modules: Text.Libyaml+ Data.Yaml+ ghc-options: -Wall+ c-sources: c/helper.c+ include-dirs: c+ if flag(system-libyaml)+ pkgconfig-depends: yaml-0.1+ else+ c-sources: libyaml/api.c,+ libyaml/dumper.c,+ libyaml/emitter.c,+ libyaml/loader.c,+ libyaml/parser.c,+ libyaml/reader.c,+ libyaml/scanner.c,+ libyaml/writer.c+ include-dirs: libyaml++test-suite test+ type: exitcode-stdio-1.0+ hs-source-dirs: test+ main-is: main.hs+ cpp-options: -DTEST+ build-depends: hspec+ , HUnit+ , directory+ , base >= 4 && < 5+ , transformers >= 0.1 && < 0.4+ , bytestring >= 0.9.1.4 && < 0.10+ , conduit+ , yaml+ , text+ , unordered-containers+ ghc-options: -Wall++source-repository head+ type: git+ location: https://github.com/snoyberg/yaml