diff --git a/License.txt b/License.txt deleted file mode 100644 --- a/License.txt +++ /dev/null @@ -1,674 +0,0 @@ - GNU GENERAL PUBLIC LICENSE - Version 3, 29 June 2007 - - Copyright (C) 2007 Free Software Foundation, Inc. - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The GNU General Public License is a free, copyleft license for -software and other kinds of works. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. By contrast, -the GNU General Public License is intended to guarantee your freedom to -share and change all versions of a program--to make sure it remains free -software for all its users. We, the Free Software Foundation, use the -GNU General Public License for most of our software; it applies also to -any other work released this way by its authors. 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If not, see . - -Also add information on how to contact you by electronic and paper mail. - - If the program does terminal interaction, make it output a short -notice like this when it starts in an interactive mode: - - Copyright (C) - This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. - This is free software, and you are welcome to redistribute it - under certain conditions; type `show c' for details. - -The hypothetical commands `show w' and `show c' should show the appropriate -parts of the General Public License. Of course, your program's commands -might be different; for a GUI interface, you would use an "about box". - - You should also get your employer (if you work as a programmer) or school, -if any, to sign a "copyright disclaimer" for the program, if necessary. -For more information on this, and how to apply and follow the GNU GPL, see -. - - The GNU General Public License does not permit incorporating your program -into proprietary programs. If your program is a subroutine library, you -may consider it more useful to permit linking proprietary applications with -the library. If this is what you want to do, use the GNU Lesser General -Public License instead of this License. But first, please read -. diff --git a/Tests.hs b/Tests.hs deleted file mode 100644 --- a/Tests.hs +++ /dev/null @@ -1,124 +0,0 @@ -{- Copyright (C) 2009 John Millikin - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . --} - -module Main () where - -import Test.HUnit -import Text.XML.LibXML.SAX - -allTests = "allTests" ~: TestList [beginTests, endTests, textTests, otherTests, incrementalTests] -beginTests = "beginTests" ~: TestList [testBegin, testBeginNS, testBeginPrefix] -endTests = "endTests" ~: TestList [testEnd, testEndNS, testEndPrefix] -textTests = "textTests" ~: TestList [testText, testPredefinedEntity, testNumericEntity] -otherTests = "otherTests" ~: TestList [testProcessingInstruction, testComment, testCDATA, testError] -incrementalTests = "incrementalTests" ~: TestList [incrBegin, incrEnd, incrText] - -testBegin = TestCase $ do - parser <- mkParser - [event] <- parse parser "" False - BeginElement (QName "" "" "test") [] @=? event - -testBeginNS = TestCase $ do - parser <- mkParser - [event] <- parse parser "" False - BeginElement (QName "urn:test" "" "test") [] @=? event - -testBeginPrefix = TestCase $ do - parser <- mkParser - [event] <- parse parser "" False - BeginElement (QName "urn:test" "t" "test") [] @=? event - -testEnd = TestCase $ do - parser <- mkParser - [_, event] <- parse parser "" True - EndElement (QName "" "" "test") @=? event - -testEndNS = TestCase $ do - parser <- mkParser - [_, event] <- parse parser "" True - EndElement (QName "urn:test" "" "test") @=? event - -testEndPrefix = TestCase $ do - parser <- mkParser - [_, event] <- parse parser "" True - EndElement (QName "urn:test" "t" "test") @=? event - -testText = TestCase $ do - parser <- mkParser - [_, event, _] <- parse parser "text here" True - Characters "text here" @=? event - -testPredefinedEntity = TestCase $ do - parser <- mkParser - events <- parse parser "text & here" True - let events' = init . tail $ events - [Characters "text ", Characters "&", Characters " here"] @=? events' - -testNumericEntity = TestCase $ do - parser <- mkParser - events <- parse parser "text < here" True - let events' = init . tail $ events - [Characters "text ", Characters "<", Characters " here"] @=? events' - -testProcessingInstruction = TestCase $ do - parser <- mkParser - events <- parse parser "" True - ProcessingInstruction "instr" "version='1.0'" @=? head events - -testComment = TestCase $ do - parser <- mkParser - events <- parse parser "" True - Comment " comment here " @=? head events - -testCDATA = TestCase $ do - parser <- mkParser - events <- parse parser "]]>" True - let events' = init . tail $ events - [Characters ""] @=? events' - -testError = TestCase $ do - parser <- mkParser - events <- parse parser "" True - [ParseError "StartTag: invalid element name\n"] @=? events - -incrBegin = TestCase $ do - parser <- mkParser - let parse' = parse parser - - [] <- parse' "" False - BeginElement (QName "" "" "test") [] @=? event - -incrEnd = TestCase $ do - parser <- mkParser - let parse' = parse parser - - [_] <- parse' "" True - EndElement (QName "" "" "test") @=? event - -incrText = TestCase $ do - parser <- mkParser - let parse' = parse parser - - [_] <- parse' "text" False - [] <- parse' " more text" False - [event, _] <- parse' "" True - Characters "text more text" @=? event - -main = do - runTestTT allTests - diff --git a/Text/XML/LibXML/SAX.chs b/Text/XML/LibXML/SAX.chs --- a/Text/XML/LibXML/SAX.chs +++ b/Text/XML/LibXML/SAX.chs @@ -1,18 +1,26 @@ -{- Copyright (C) 2009 John Millikin - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation, either version 3 of the License, or - any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see . --} +-- Copyright (c) 2009-2010 John Millikin +-- Copyright (c) 2010 Dmitry Astapov +-- +-- 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. {-# LANGUAGE ForeignFunctionInterface #-} @@ -20,38 +28,35 @@ module Text.XML.LibXML.SAX ( Parser - , Event(..) - , Attribute(..) - , QName(..) - , mkParser + , Event (..) + , Error (..) + , newParser , parse + , eventsToElement ) where +import Control.Monad (foldM) +import qualified Data.ByteString as B +import qualified Data.ByteString.Unsafe as B +import qualified Data.ByteString.Lazy as BL +import qualified Data.Text.Lazy as T +import qualified Data.Text.Lazy.Encoding as TE +import qualified Data.FailableList as FL +import qualified Data.XML.Types as X import Data.IORef (newIORef, readIORef, writeIORef, IORef) import Foreign import Foreign.C import Control.Exception (bracket) data Event = - BeginElement QName [Attribute] - | EndElement QName - | Characters String - | Comment String - | ProcessingInstruction String String -- ^ Target, Data - | ParseError String - deriving (Show, Eq) - -data Attribute = Attribute - { attributeName :: QName - , attributeValue :: String - } + BeginElement X.Name [X.Attribute] + | EndElement X.Name + | Characters T.Text + | Comment T.Text + | ProcessingInstruction X.Instruction deriving (Show, Eq) -data QName = QName - { qnameNamespace :: String - , qnamePrefix :: String - , qnameLocalName :: String - } +data Error = Error T.Text deriving (Show, Eq) -- | An opaque reference to a libXML SAX parser. @@ -65,7 +70,7 @@ sizeOf _ = {#sizeof xmlSAXHandler #} alignment _ = alignment (undefined :: FunPtr ()) peekByteOff = undefined - pokeByteOff handler offset val = return () + pokeByteOff _ _ _ = return () {#pointer *xmlParserCtxt as ContextPtr -> Context #} {#pointer *xmlSAXHandler as SAXHandlerPtr -> SAXHandler #} @@ -73,8 +78,8 @@ -- | Construct a new, empty parser. -- -mkParser :: IO Parser -mkParser = let n = nullPtr in do +newParser :: IO Parser +newParser = let n = nullPtr in do context <- {#call xmlCreatePushParserCtxt #} n n n 0 n autoptr <- newForeignPtr xmlFreeParserCtxt context return $ Parser autoptr @@ -89,19 +94,34 @@ -- If the third parameter is 'True', the parser assumes that this is the -- last input and checks that the document was closed correctly. -- -parse :: Parser -> String -> Bool -> IO [Event] -parse (Parser fptr) s final = do - withCStringLen s $ \(cs, cs_len) -> do - withForeignPtr fptr $ \ctxt -> do - withHandlers ctxt $ \eventRef -> do - - let cFinal = if final then 1 else 0 +parse :: Parser -> BL.ByteString -> Bool -> IO (FL.FailableList Error Event) +parse (Parser fptr) lazyBytes final = io where + io = + withForeignPtr fptr $ \ctx -> + withHandlers ctx $ \ref -> do + chunkRC <- foldM (parseChunk ctx) Nothing $ BL.toChunks lazyBytes + rc <- case chunkRC of + Nothing -> if final + then {#call xmlParseChunk #} ctx nullPtr 0 1 + else return 0 + Just err -> return err + events <- convertEvents `fmap` readIORef ref + case rc of + 0 -> return events + _ -> do + errInfo <- {#call xmlCtxtGetLastError #} (castPtr ctx) + message <- peekCString =<< {#get xmlError->message #} errInfo + return $ FL.append events $ FL.Fail $ Error $ T.pack message - rc <- {#call xmlParseChunk #} ctxt cs (fromIntegral cs_len) cFinal - errors <- checkErrors rc ctxt - events <- readIORef eventRef - return $ reverse events ++ errors + parseChunk _ (Just err) _ = return $ Just err + parseChunk ctx _ bytes = B.unsafeUseAsCStringLen bytes $ \(cs, csLen) -> do + rc <- {#call xmlParseChunk #} ctx cs (fromIntegral csLen) 0 + return $ if rc == 0 + then Nothing + else Just rc + convertEvents = foldr FL.Next FL.Done . reverse + withHandlers :: Ptr Context -> (IORef [Event] -> IO a) -> IO a withHandlers ctxt block = do eventRef <- newIORef [] @@ -109,7 +129,7 @@ withFunPtr (onEndElement eventRef) wrappedEnd $ \e -> do withFunPtr (onCharacters eventRef) wrappedText $ \t -> do withFunPtr (onComment eventRef) wrappedComment $ \c -> do - withFunPtr (onProcessingInstruction eventRef) wrappedProcessingInstruction $ \pi -> do + withFunPtr (onProcessingInstruction eventRef) wrappedProcessingInstruction $ \pI -> do bracket (setContextHandlers ctxt) @@ -120,59 +140,58 @@ {#set xmlSAXHandler->endElementNs #} handlers e {#set xmlSAXHandler->characters #} handlers t {#set xmlSAXHandler->comment #} handlers c - {#set xmlSAXHandler->processingInstruction #} handlers pi + {#set xmlSAXHandler->processingInstruction #} handlers pI block eventRef - + setContextHandlers :: Ptr Context -> IO (Ptr SAXHandler) setContextHandlers ctxt = do handlers <- {#call calloc #} 1 {#sizeof xmlSAXHandler #} let handlers' = castPtr handlers {# set xmlParserCtxt->sax #} ctxt handlers' return handlers' - + freeContextHandlers :: Ptr Context -> Ptr SAXHandler -> IO () freeContextHandlers ctxt handlers = do {# set xmlParserCtxt->sax #} ctxt nullPtr free handlers - + withFunPtr :: a -> (a -> IO (FunPtr a)) -> (FunPtr a -> IO b) -> IO b withFunPtr f mkPtr block = bracket (mkPtr f) freeHaskellFunPtr block -checkErrors :: CInt -> Ptr Context -> IO [Event] -checkErrors 0 _ = return [] -checkErrors rc ctxt = do - errInfo <- {#call xmlCtxtGetLastError #} (castPtr ctxt) - message <- peekCString =<< {#get xmlError->message #} errInfo - return [ParseError message] - -- localname, prefix, namespace, value_begin, value_end data CAttribute = CAttribute CString CString CString CString CString splitCAttributes :: CInt -> Ptr CString -> IO [CAttribute] -splitCAttributes = splitCAttributes' 0 - -splitCAttributes' _ 0 _ = return [] -splitCAttributes' offset n attrs = do - c_ln <- peekElemOff attrs (offset + 0) - c_prefix <- peekElemOff attrs (offset + 1) - c_ns <- peekElemOff attrs (offset + 2) - c_vbegin <- peekElemOff attrs (offset + 3) - c_vend <- peekElemOff attrs (offset + 4) - as <- splitCAttributes' (offset + 5) (n - 1) attrs - return (CAttribute c_ln c_prefix c_ns c_vbegin c_vend : as) +splitCAttributes = splitCAttributes' 0 where + splitCAttributes' _ 0 _ = return [] + splitCAttributes' offset n attrs = do + c_ln <- peekElemOff attrs (offset + 0) + c_prefix <- peekElemOff attrs (offset + 1) + c_ns <- peekElemOff attrs (offset + 2) + c_vbegin <- peekElemOff attrs (offset + 3) + c_vend <- peekElemOff attrs (offset + 4) + as <- splitCAttributes' (offset + 5) (n - 1) attrs + return (CAttribute c_ln c_prefix c_ns c_vbegin c_vend : as) -convertCAttribute :: CAttribute -> IO Attribute +convertCAttribute :: CAttribute -> IO X.Attribute convertCAttribute (CAttribute c_ln c_pfx c_ns c_vbegin c_vend) = do - ln <- peekCString c_ln - pfx <- peekNullable c_pfx - ns <- peekNullable c_ns - val <- peekCStringLen (c_vbegin, minusPtr c_vend c_vbegin) - return (Attribute (QName ns pfx ln) val) + ln <- peekUTF8 c_ln + pfx <- maybePeek peekUTF8 c_pfx + ns <- maybePeek peekUTF8 c_ns + val <- peekUTF8Len (c_vbegin, minusPtr c_vend c_vbegin) + return (X.Attribute (X.Name ln ns pfx) [X.ContentText val]) -peekNullable :: CString -> IO String -peekNullable ptr = if ptr == nullPtr then return "" else peekCString ptr +peekUTF8 :: CString -> IO T.Text +peekUTF8 cstr = do + chunk <- B.packCString cstr + return $ TE.decodeUtf8 $ BL.fromChunks [chunk] +peekUTF8Len :: CStringLen -> IO T.Text +peekUTF8Len cstr = do + chunk <- B.packCStringLen cstr + return $ TE.decodeUtf8 $ BL.fromChunks [chunk] + type CUString = Ptr CUChar type StartElementNsSAX2Func = (Ptr () -> CUString -> CUString @@ -188,41 +207,81 @@ onBeginElement :: IORef [Event] -> StartElementNsSAX2Func onBeginElement eventref _ cln cpfx cns _ _ n_attrs _ raw_attrs = do - ns <- peekNullable $ castPtr cns - pfx <- peekNullable $ castPtr cpfx - ln <- peekCString $ castPtr cln + ns <- maybePeek peekUTF8 $ castPtr cns + pfx <- maybePeek peekUTF8 $ castPtr cpfx + ln <- peekUTF8 $ castPtr cln es <- readIORef eventref c_attrs <- splitCAttributes n_attrs (castPtr raw_attrs) attrs <- mapM convertCAttribute c_attrs - writeIORef eventref ((BeginElement (QName ns pfx ln) attrs):es) + writeIORef eventref ((BeginElement (X.Name ln ns pfx) attrs):es) onEndElement :: IORef [Event] -> EndElementNsSAX2Func onEndElement eventref _ cln cpfx cns = do - ns <- peekNullable $ castPtr cns - pfx <- peekNullable $ castPtr cpfx - ln <- peekCString $ castPtr cln + ns <- maybePeek peekUTF8 $ castPtr cns + pfx <- maybePeek peekUTF8 $ castPtr cpfx + ln <- peekUTF8 $ castPtr cln es <- readIORef eventref - writeIORef eventref ((EndElement (QName ns pfx ln)):es) + writeIORef eventref ((EndElement (X.Name ln ns pfx)):es) onCharacters :: IORef [Event] -> CharactersSAXFunc onCharacters eventref _ ctext ctextlen = do - text <- peekCStringLen (castPtr ctext, fromIntegral ctextlen) + text <- peekUTF8Len (castPtr ctext, fromIntegral ctextlen) es <- readIORef eventref writeIORef eventref ((Characters text):es) onComment :: IORef [Event] -> CommentSAXFunc onComment eventRef _ ctext = do - text <- peekCString (castPtr ctext) + text <- peekUTF8 (castPtr ctext) es <- readIORef eventRef writeIORef eventRef ((Comment text):es) onProcessingInstruction :: IORef [Event] -> ProcessingInstructionSAXFunc onProcessingInstruction eventRef _ ctarget cdata = do - target <- peekCString (castPtr ctarget) - data' <- peekCString (castPtr cdata) + target <- peekUTF8 (castPtr ctarget) + value <- peekUTF8 (castPtr cdata) es <- readIORef eventRef - writeIORef eventRef ((ProcessingInstruction target data'):es) + let instruction = X.Instruction target value + writeIORef eventRef ((ProcessingInstruction instruction):es) +-- | Convert a list of events to a single 'X.Element'. If the events do not +-- contain at least one valid element, 'Nothing' will be returned instead. +eventsToElement :: [Event] -> Maybe X.Element +eventsToElement es = case eventsToNodes es >>= X.isElement of + (e:_) -> Just e + _ -> Nothing + +eventsToNodes :: [Event] -> [X.Node] +eventsToNodes = concatMap blockToNodes . splitBlocks + +-- Split event list into a sequence of "blocks", which are the events including +-- and between a pair of tags. and are both +-- single blocks. +splitBlocks :: [Event] -> [[Event]] +splitBlocks es = ret where + (_, _, ret) = foldl splitBlocks' (0, [], []) es + + splitBlocks' (depth, accum, allAccum) e = split where + split = if depth' == 0 + then (depth', [], allAccum ++ [accum']) + else (depth', accum', allAccum) + accum' = accum ++ [e] + depth' :: Integer + depth' = depth + case e of + (BeginElement _ _) -> 1 + (EndElement _) -> (- 1) + _ -> 0 + +blockToNodes :: [Event] -> [X.Node] +blockToNodes [] = [] +blockToNodes (begin:rest) = nodes where + end = last rest + nodes = case (begin, end) of + (BeginElement name' attrs, EndElement _) -> [node name' attrs] + (Characters t, _) -> [X.NodeContent (X.ContentText t)] + _ -> [] + + node n as = X.NodeElement $ X.Element n as $ eventsToNodes $ init rest + foreign import ccall "wrapper" wrappedBegin :: StartElementNsSAX2Func -> IO (FunPtr StartElementNsSAX2Func) @@ -239,4 +298,5 @@ wrappedProcessingInstruction :: ProcessingInstructionSAXFunc -> IO (FunPtr ProcessingInstructionSAXFunc) -- XML_SAX2_MAGIC -xmlSax2Magic = 0xDEEDBEAF :: CUInt +xmlSax2Magic :: CUInt +xmlSax2Magic = 0xDEEDBEAF diff --git a/libxml-sax.cabal b/libxml-sax.cabal --- a/libxml-sax.cabal +++ b/libxml-sax.cabal @@ -1,27 +1,35 @@ Name: libxml-sax -Version: 0.3 -Stability: Alpha +Version: 0.4 +stability: experimental Synopsis: Bindings for the libXML2 SAX interface -Description: Incrementally convert text to lists of XML events -License: GPL-3 -License-file: License.txt +License: MIT +License-file: license.txt Author: John Millikin maintainer: jmillikin@gmail.com -copyright: Copyright (c) John Millikin 2009-2010, - (c) Dmitry Astapov 2010 +copyright: John Millikin 2009-2010, Dmitry Astapov 2010 Build-Type: Simple -Cabal-Version: >=1.4 -Category: XML -homepage: http://ianen.org/haskell/bindings/libxml-sax/ -tested-with: GHC==6.10.4 -extra-source-files: Tests.hs +Cabal-Version: >=1.6 +Category: Text, XML, Parsing +tested-with: GHC==6.10.4, GHC==6.12.1 -Library - Build-Depends: base >=3 && < 5 +source-repository head + type: darcs + location: http://ianen.org/haskell/bindings/libxml-sax/ + +library + ghc-options: -Wall -fno-warn-unused-do-bind + build-tools: c2hs - Exposed-modules: Text.XML.LibXML.SAX + build-depends: + base >=3 && < 5 + , bytestring >= 0.9 && < 0.10 + , text >= 0.7 && < 0.8 + , xml-types >= 0.1 && < 0.2 + , failable-list >= 0.2 && < 0.3 + extra-libraries: xml2 pkgconfig-depends: libxml-2.0 - Extensions: ForeignFunctionInterface + exposed-modules: + Text.XML.LibXML.SAX diff --git a/license.txt b/license.txt new file mode 100644 --- /dev/null +++ b/license.txt @@ -0,0 +1,22 @@ +Copyright (c) 2010 John Millikin + +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.