yaml 0.7.0 → 0.7.0.1
raw patch · 20 files changed
+14147/−14147 lines, 20 filessetup-changed
Files
- Data/Yaml.hs +266/−266
- 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 +303/−303
- yaml.cabal +78/−78
Data/Yaml.hs view
@@ -1,266 +1,266 @@-{-# 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- -> C.Sink Event Parse Text-parseScalar v a = do- let res = decodeUtf8With lenientDecode v- case a of- Nothing -> return res- Just an -> do- lift $ modify (Map.insert an $ textToValue res)- return res--textToValue :: Text -> Value -- FIXME check for quoting style?-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 _s a) -> fmap textToValue $ parseScalar v a- 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 _ _ a') -> parseScalar v a'- _ -> 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 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 + -> C.Sink Event Parse Text +parseScalar v a = do + let res = decodeUtf8With lenientDecode v + case a of + Nothing -> return res + Just an -> do + lift $ modify (Map.insert an $ textToValue res) + return res + +textToValue :: Text -> Value -- FIXME check for quoting style? +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 _s a) -> fmap textToValue $ parseScalar v a + 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 _ _ a') -> parseScalar v a' + _ -> 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
@@ -1,303 +1,303 @@-{-# 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--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)- ]+{-# 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 + +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) + ]
yaml.cabal view
@@ -1,78 +1,78 @@-name: yaml-version: 0.7.0-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: 0.7.0.1 +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