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|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include "sax/fastparser.hxx"
#include "sax/fastattribs.hxx"
#include "xml2utf.hxx"
#include <com/sun/star/lang/DisposedException.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <com/sun/star/xml/sax/FastToken.hpp>
#include <com/sun/star/xml/sax/SAXParseException.hpp>
#include <com/sun/star/xml/sax/XFastContextHandler.hpp>
#include <com/sun/star/xml/sax/XFastDocumentHandler.hpp>
#include <com/sun/star/xml/sax/XFastTokenHandler.hpp>
#include <cppuhelper/implbase.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <cppuhelper/exc_hlp.hxx>
#include <osl/conditn.hxx>
#include <osl/diagnose.h>
#include <rtl/ref.hxx>
#include <rtl/ustrbuf.hxx>
#include <sal/log.hxx>
#include <salhelper/thread.hxx>
#include <queue>
#include <memory>
#include <stack>
#include <unordered_map>
#include <vector>
#include <cassert>
#include <cstring>
#include <libxml/parser.h>
// Inverse of libxml's BAD_CAST.
#define XML_CAST( str ) reinterpret_cast< const sal_Char* >( str )
using namespace std;
using namespace ::osl;
using namespace ::cppu;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::xml::sax;
using namespace ::com::sun::star::io;
using namespace com::sun::star;
using namespace sax_fastparser;
namespace {
struct Event;
class FastLocatorImpl;
struct NamespaceDefine;
struct Entity;
typedef std::unordered_map< OUString, sal_Int32,
OUStringHash > NamespaceMap;
typedef std::vector<Event> EventList;
enum CallbackType { INVALID, START_ELEMENT, END_ELEMENT, CHARACTERS, DONE, EXCEPTION };
struct Event
{
CallbackType maType;
sal_Int32 mnElementToken;
OUString msNamespace;
OUString msElementName;
rtl::Reference< FastAttributeList > mxAttributes;
OUString msChars;
};
struct NameWithToken
{
OUString msName;
sal_Int32 mnToken;
NameWithToken(const OUString& sName, const sal_Int32& nToken) :
msName(sName), mnToken(nToken) {}
};
struct SaxContext
{
Reference< XFastContextHandler > mxContext;
sal_Int32 mnElementToken;
OUString maNamespace;
OUString maElementName;
SaxContext( sal_Int32 nElementToken, const OUString& aNamespace, const OUString& aElementName ):
mnElementToken(nElementToken)
{
if (nElementToken == FastToken::DONTKNOW)
{
maNamespace = aNamespace;
maElementName = aElementName;
}
}
};
struct ParserData
{
css::uno::Reference< css::xml::sax::XFastDocumentHandler > mxDocumentHandler;
css::uno::Reference< css::xml::sax::XFastTokenHandler > mxTokenHandler;
FastTokenHandlerBase* mpTokenHandler;
css::uno::Reference< css::xml::sax::XErrorHandler > mxErrorHandler;
css::uno::Reference< css::xml::sax::XEntityResolver > mxEntityResolver;
css::lang::Locale maLocale;
ParserData();
~ParserData();
};
struct NamespaceDefine
{
OString maPrefix;
sal_Int32 mnToken;
OUString maNamespaceURL;
NamespaceDefine( const OString& rPrefix, sal_Int32 nToken, const OUString& rNamespaceURL ) : maPrefix( rPrefix ), mnToken( nToken ), maNamespaceURL( rNamespaceURL ) {}
};
// Entity binds all information needed for a single file | single call of parseStream
struct Entity : public ParserData
{
// Amount of work producer sends to consumer in one iteration:
static const size_t mnEventListSize = 1000;
// unique for each Entity instance:
// Number of valid events in mpProducedEvents:
size_t mnProducedEventsSize;
EventList *mpProducedEvents;
std::queue< EventList * > maPendingEvents;
std::queue< EventList * > maUsedEvents;
osl::Mutex maEventProtector;
static const size_t mnEventLowWater = 4;
static const size_t mnEventHighWater = 8;
osl::Condition maConsumeResume;
osl::Condition maProduceResume;
// Event we use to store data if threading is disabled:
Event maSharedEvent;
// copied in copy constructor:
// Allow to disable threading for small documents:
bool mbEnableThreads;
css::xml::sax::InputSource maStructSource;
xmlParserCtxtPtr mpParser;
::sax_expatwrap::XMLFile2UTFConverter maConverter;
// Exceptions cannot be thrown through the C-XmlParser (possible
// resource leaks), therefore any exception thrown by a UNO callback
// must be saved somewhere until the C-XmlParser is stopped.
css::uno::Any maSavedException;
void saveException( const Any & e );
void throwException( const ::rtl::Reference< FastLocatorImpl > &xDocumentLocator,
bool mbDuringParse );
std::stack< NameWithToken > maNamespaceStack;
/* Context for main thread consuming events.
* startElement() stores the data, which characters() and endElement() uses
*/
std::stack< SaxContext> maContextStack;
// Determines which elements of maNamespaceDefines are valid in current context
std::stack< sal_uInt32 > maNamespaceCount;
std::vector< std::shared_ptr< NamespaceDefine > >
maNamespaceDefines;
explicit Entity( const ParserData& rData );
Entity( const Entity& rEntity );
~Entity();
void startElement( Event *pEvent );
void characters( const OUString& sChars );
void endElement();
EventList* getEventList();
Event& getEvent( CallbackType aType );
};
} // namespace
namespace sax_fastparser {
class FastSaxParserImpl
{
public:
explicit FastSaxParserImpl(FastSaxParser* pFront);
~FastSaxParserImpl();
// XFastParser
void parseStream( const css::xml::sax::InputSource& aInputSource ) throw (css::xml::sax::SAXException, css::io::IOException, css::uno::RuntimeException, std::exception);
void setFastDocumentHandler( const css::uno::Reference< css::xml::sax::XFastDocumentHandler >& Handler ) throw (css::uno::RuntimeException);
void setTokenHandler( const css::uno::Reference< css::xml::sax::XFastTokenHandler >& Handler ) throw (css::uno::RuntimeException);
void registerNamespace( const OUString& NamespaceURL, sal_Int32 NamespaceToken ) throw (css::lang::IllegalArgumentException, css::uno::RuntimeException);
OUString getNamespaceURL( const OUString& rPrefix ) throw(css::lang::IllegalArgumentException, css::uno::RuntimeException);
void setErrorHandler( const css::uno::Reference< css::xml::sax::XErrorHandler >& Handler ) throw (css::uno::RuntimeException);
void setEntityResolver( const css::uno::Reference< css::xml::sax::XEntityResolver >& Resolver ) throw (css::uno::RuntimeException);
void setLocale( const css::lang::Locale& rLocale ) throw (css::uno::RuntimeException);
// called by the C callbacks of the expat parser
void callbackStartElement( const xmlChar *localName , const xmlChar* prefix, const xmlChar* URI,
int numNamespaces, const xmlChar** namespaces, int numAttributes, int defaultedAttributes, const xmlChar **attributes );
void callbackEndElement( const xmlChar* localName, const xmlChar* prefix, const xmlChar* URI );
void callbackCharacters( const xmlChar* s, int nLen );
#if 0
bool callbackExternalEntityRef( XML_Parser parser, const xmlChar *openEntityNames, const xmlChar *base, const xmlChar *systemId, const xmlChar *publicId);
void callbackEntityDecl(const xmlChar *entityName, int is_parameter_entity,
const xmlChar *value, int value_length, const xmlChar *base,
const xmlChar *systemId, const xmlChar *publicId,
const xmlChar *notationName);
#endif
void pushEntity( const Entity& rEntity );
void popEntity();
Entity& getEntity() { return *mpTop; }
void parse();
void produce( bool bForceFlush = false );
private:
bool consume(EventList *);
void deleteUsedEvents();
void sendPendingCharacters();
sal_Int32 GetToken( const xmlChar* pName, sal_Int32 nameLen );
sal_Int32 GetTokenWithPrefix( const xmlChar* pPrefix, int prefixLen, const xmlChar* pName, int nameLen ) throw (css::xml::sax::SAXException);
OUString GetNamespaceURL( const OString& rPrefix ) throw (css::xml::sax::SAXException);
sal_Int32 GetNamespaceToken( const OUString& rNamespaceURL );
sal_Int32 GetTokenWithContextNamespace( sal_Int32 nNamespaceToken, const xmlChar* pName, int nNameLen );
void DefineNamespace( const OString& rPrefix, const OUString& namespaceURL );
private:
#if 0
FastSaxParser* mpFront;
#endif
osl::Mutex maMutex; ///< Protecting whole parseStream() execution
::rtl::Reference< FastLocatorImpl > mxDocumentLocator;
NamespaceMap maNamespaceMap;
ParserData maData; /// Cached parser configuration for next call of parseStream().
Entity *mpTop; /// std::stack::top() is amazingly slow => cache this.
std::stack< Entity > maEntities; /// Entity stack for each call of parseStream().
OUString pendingCharacters; /// Data from characters() callback that needs to be sent.
};
} // namespace sax_fastparser
namespace {
class ParserThread: public salhelper::Thread
{
FastSaxParserImpl *mpParser;
public:
explicit ParserThread(FastSaxParserImpl *pParser): Thread("Parser"), mpParser(pParser) {}
private:
virtual void execute() override
{
try
{
mpParser->parse();
}
catch (const Exception &)
{
Entity &rEntity = mpParser->getEntity();
rEntity.getEvent( EXCEPTION );
mpParser->produce( true );
}
}
};
extern "C" {
static void call_callbackStartElement(void *userData, const xmlChar *localName , const xmlChar* prefix, const xmlChar* URI,
int numNamespaces, const xmlChar** namespaces, int numAttributes, int defaultedAttributes, const xmlChar **attributes)
{
FastSaxParserImpl* pFastParser = static_cast<FastSaxParserImpl*>( userData );
pFastParser->callbackStartElement( localName, prefix, URI, numNamespaces, namespaces, numAttributes, defaultedAttributes, attributes );
}
static void call_callbackEndElement(void *userData, const xmlChar* localName, const xmlChar* prefix, const xmlChar* URI)
{
FastSaxParserImpl* pFastParser = static_cast<FastSaxParserImpl*>( userData );
pFastParser->callbackEndElement( localName, prefix, URI );
}
static void call_callbackCharacters( void *userData , const xmlChar *s , int nLen )
{
FastSaxParserImpl* pFastParser = static_cast<FastSaxParserImpl*>( userData );
pFastParser->callbackCharacters( s, nLen );
}
#if 0
static void call_callbackEntityDecl(void *userData, const xmlChar *entityName,
int is_parameter_entity, const xmlChar *value, int value_length,
const xmlChar *base, const xmlChar *systemId,
const xmlChar *publicId, const xmlChar *notationName)
{
FastSaxParserImpl* pFastParser = reinterpret_cast<FastSaxParserImpl*>(userData);
pFastParser->callbackEntityDecl(entityName, is_parameter_entity, value,
value_length, base, systemId, publicId, notationName);
}
static int call_callbackExternalEntityRef( XML_Parser parser,
const xmlChar *openEntityNames, const xmlChar *base, const xmlChar *systemId, const xmlChar *publicId )
{
FastSaxParserImpl* pFastParser = reinterpret_cast<FastSaxParserImpl*>( XML_GetUserData( parser ) );
return pFastParser->callbackExternalEntityRef( parser, openEntityNames, base, systemId, publicId );
}
#endif
}
class FastLocatorImpl : public WeakImplHelper< XLocator >
{
public:
explicit FastLocatorImpl(FastSaxParserImpl *p) : mpParser(p) {}
void dispose() { mpParser = nullptr; }
void checkDispose() throw (RuntimeException) { if( !mpParser ) throw DisposedException(); }
//XLocator
virtual sal_Int32 SAL_CALL getColumnNumber() throw (RuntimeException, std::exception) override;
virtual sal_Int32 SAL_CALL getLineNumber() throw (RuntimeException, std::exception) override;
virtual OUString SAL_CALL getPublicId() throw (RuntimeException, std::exception) override;
virtual OUString SAL_CALL getSystemId() throw (RuntimeException, std::exception) override;
private:
FastSaxParserImpl *mpParser;
};
sal_Int32 SAL_CALL FastLocatorImpl::getColumnNumber() throw (RuntimeException, std::exception)
{
checkDispose();
return xmlSAX2GetColumnNumber( mpParser->getEntity().mpParser );
}
sal_Int32 SAL_CALL FastLocatorImpl::getLineNumber() throw (RuntimeException, std::exception)
{
checkDispose();
return xmlSAX2GetLineNumber( mpParser->getEntity().mpParser );
}
OUString SAL_CALL FastLocatorImpl::getPublicId() throw (RuntimeException, std::exception)
{
checkDispose();
return mpParser->getEntity().maStructSource.sPublicId;
}
OUString SAL_CALL FastLocatorImpl::getSystemId() throw (RuntimeException, std::exception)
{
checkDispose();
return mpParser->getEntity().maStructSource.sSystemId;
}
ParserData::ParserData()
: mpTokenHandler( nullptr )
{}
ParserData::~ParserData()
{}
Entity::Entity(const ParserData& rData)
: ParserData(rData)
, mnProducedEventsSize(0)
, mpProducedEvents(nullptr)
, mbEnableThreads(false)
, mpParser(nullptr)
{
}
Entity::Entity(const Entity& e)
: ParserData(e)
, mnProducedEventsSize(0)
, mpProducedEvents(nullptr)
, mbEnableThreads(e.mbEnableThreads)
, maStructSource(e.maStructSource)
, mpParser(e.mpParser)
, maConverter(e.maConverter)
, maSavedException(e.maSavedException)
, maNamespaceStack(e.maNamespaceStack)
, maContextStack(e.maContextStack)
, maNamespaceCount(e.maNamespaceCount)
, maNamespaceDefines(e.maNamespaceDefines)
{
}
Entity::~Entity()
{
}
void Entity::startElement( Event *pEvent )
{
const sal_Int32& nElementToken = pEvent->mnElementToken;
const OUString& aNamespace = pEvent->msNamespace;
const OUString& aElementName = pEvent->msElementName;
// Use un-wrapped pointers to avoid significant acquire/release overhead
XFastContextHandler *pParentContext = nullptr;
if( !maContextStack.empty() )
{
pParentContext = maContextStack.top().mxContext.get();
if( !pParentContext )
{
maContextStack.push( SaxContext(nElementToken, aNamespace, aElementName) );
return;
}
}
maContextStack.push( SaxContext( nElementToken, aNamespace, aElementName ) );
try
{
Reference< XFastAttributeList > xAttr( pEvent->mxAttributes.get() );
Reference< XFastContextHandler > xContext;
if( nElementToken == FastToken::DONTKNOW )
{
if( pParentContext )
xContext = pParentContext->createUnknownChildContext( aNamespace, aElementName, xAttr );
else if( mxDocumentHandler.is() )
xContext = mxDocumentHandler->createUnknownChildContext( aNamespace, aElementName, xAttr );
if( xContext.is() )
{
xContext->startUnknownElement( aNamespace, aElementName, xAttr );
}
}
else
{
if( pParentContext )
xContext = pParentContext->createFastChildContext( nElementToken, xAttr );
else if( mxDocumentHandler.is() )
xContext = mxDocumentHandler->createFastChildContext( nElementToken, xAttr );
if( xContext.is() )
xContext->startFastElement( nElementToken, xAttr );
}
// swap the reference we own in to avoid referencing thrash.
maContextStack.top().mxContext.set( static_cast<XFastContextHandler *>( xContext.get() ) );
xContext.set( nullptr, UNO_REF_NO_ACQUIRE );
}
catch (const Exception&)
{
saveException( ::cppu::getCaughtException() );
}
}
void Entity::characters( const OUString& sChars )
{
if (maContextStack.empty())
{
// Malformed XML stream !?
return;
}
const Reference< XFastContextHandler >& xContext( maContextStack.top().mxContext );
if( xContext.is() ) try
{
xContext->characters( sChars );
}
catch (const Exception&)
{
saveException( ::cppu::getCaughtException() );
}
}
void Entity::endElement()
{
if (maContextStack.empty())
{
// Malformed XML stream !?
return;
}
const SaxContext& aContext = maContextStack.top();
const Reference< XFastContextHandler >& xContext( aContext.mxContext );
if( xContext.is() ) try
{
sal_Int32 nElementToken = aContext.mnElementToken;
if( nElementToken != FastToken::DONTKNOW )
xContext->endFastElement( nElementToken );
else
xContext->endUnknownElement( aContext.maNamespace, aContext.maElementName );
}
catch (const Exception&)
{
saveException( ::cppu::getCaughtException() );
}
maContextStack.pop();
}
EventList* Entity::getEventList()
{
if (!mpProducedEvents)
{
osl::ResettableMutexGuard aGuard(maEventProtector);
if (!maUsedEvents.empty())
{
mpProducedEvents = maUsedEvents.front();
maUsedEvents.pop();
aGuard.clear(); // unlock
mnProducedEventsSize = 0;
}
if (!mpProducedEvents)
{
mpProducedEvents = new EventList();
mpProducedEvents->resize(mnEventListSize);
mnProducedEventsSize = 0;
}
}
return mpProducedEvents;
}
Event& Entity::getEvent( CallbackType aType )
{
if (!mbEnableThreads)
return maSharedEvent;
EventList* pEventList = getEventList();
Event& rEvent = (*pEventList)[mnProducedEventsSize++];
rEvent.maType = aType;
return rEvent;
}
OUString lclGetErrorMessage( xmlParserCtxtPtr ctxt, const OUString& sSystemId, sal_Int32 nLine )
{
const sal_Char* pMessage;
xmlErrorPtr error = xmlCtxtGetLastError( ctxt );
if( error && error->message )
pMessage = error->message;
else
pMessage = "unknown error";
OUStringBuffer aBuffer( "[" );
aBuffer.append( sSystemId );
aBuffer.append( " line " );
aBuffer.append( nLine );
aBuffer.append( "]: " );
aBuffer.appendAscii( pMessage );
return aBuffer.makeStringAndClear();
}
// throw an exception, but avoid callback if
// during a threaded produce
void Entity::throwException( const ::rtl::Reference< FastLocatorImpl > &xDocumentLocator,
bool mbDuringParse )
{
// Error during parsing !
SAXParseException aExcept(
lclGetErrorMessage( mpParser,
xDocumentLocator->getSystemId(),
xDocumentLocator->getLineNumber() ),
Reference< XInterface >(),
Any( &maSavedException, cppu::UnoType<decltype(maSavedException)>::get() ),
xDocumentLocator->getPublicId(),
xDocumentLocator->getSystemId(),
xDocumentLocator->getLineNumber(),
xDocumentLocator->getColumnNumber()
);
// error handler is set, it may throw the exception
if( !mbDuringParse || !mbEnableThreads )
{
if (mxErrorHandler.is() )
mxErrorHandler->fatalError( Any( aExcept ) );
}
// error handler has not thrown, but parsing must stop => throw ourselves
throw aExcept;
}
// In the single threaded case we emit events via our C
// callbacks, so any exception caught must be queued up until
// we can safely re-throw it from our C++ parent of parse()
// If multi-threaded, we need to push an EXCEPTION event, at
// which point we transfer ownership of maSavedException to
// the consuming thread.
void Entity::saveException( const Any & e )
{
// fdo#81214 - allow the parser to run on after an exception,
// unexpectedly some 'startElements' produce an UNO_QUERY_THROW
// for XComponent; and yet expect to continue parsing.
SAL_WARN("sax", "Unexpected exception from XML parser "
<< e.get<Exception>().Message);
maSavedException = e;
}
} // namespace
namespace sax_fastparser {
FastSaxParserImpl::FastSaxParserImpl( FastSaxParser* ) :
#if 0
mpFront(pFront),
#endif
mpTop(nullptr)
{
mxDocumentLocator.set( new FastLocatorImpl( this ) );
}
FastSaxParserImpl::~FastSaxParserImpl()
{
if( mxDocumentLocator.is() )
mxDocumentLocator->dispose();
}
void FastSaxParserImpl::DefineNamespace( const OString& rPrefix, const OUString& namespaceURL )
{
Entity& rEntity = getEntity();
assert(!rEntity.maNamespaceCount.empty()); // need a context!
sal_uInt32 nOffset = rEntity.maNamespaceCount.top()++;
if( rEntity.maNamespaceDefines.size() <= nOffset )
rEntity.maNamespaceDefines.resize( rEntity.maNamespaceDefines.size() + 64 );
rEntity.maNamespaceDefines[nOffset].reset( new NamespaceDefine( rPrefix, GetNamespaceToken( namespaceURL ), namespaceURL ) );
}
sal_Int32 FastSaxParserImpl::GetToken( const xmlChar* pName, sal_Int32 nameLen /* = 0 */ )
{
return FastTokenHandlerBase::getTokenFromChars( getEntity().mxTokenHandler,
getEntity().mpTokenHandler,
XML_CAST( pName ), nameLen ); // uses utf-8
}
sal_Int32 FastSaxParserImpl::GetTokenWithPrefix( const xmlChar* pPrefix, int nPrefixLen, const xmlChar* pName, int nNameLen ) throw (SAXException)
{
sal_Int32 nNamespaceToken = FastToken::DONTKNOW;
Entity& rEntity = getEntity();
if (rEntity.maNamespaceCount.empty())
return nNamespaceToken;
sal_uInt32 nNamespace = rEntity.maNamespaceCount.top();
while( nNamespace-- )
{
const OString& rPrefix( rEntity.maNamespaceDefines[nNamespace]->maPrefix );
if( (rPrefix.getLength() == nPrefixLen) &&
(strncmp( rPrefix.getStr(), XML_CAST( pPrefix ), nPrefixLen ) == 0 ) )
{
nNamespaceToken = rEntity.maNamespaceDefines[nNamespace]->mnToken;
break;
}
if( !nNamespace )
throw SAXException("No namespace defined for " + OUString(XML_CAST(pPrefix),
nPrefixLen, RTL_TEXTENCODING_UTF8), Reference< XInterface >(), Any());
}
if( nNamespaceToken != FastToken::DONTKNOW )
{
sal_Int32 nNameToken = GetToken( pName, nNameLen );
if( nNameToken != FastToken::DONTKNOW )
return nNamespaceToken | nNameToken;
}
return FastToken::DONTKNOW;
}
sal_Int32 FastSaxParserImpl::GetNamespaceToken( const OUString& rNamespaceURL )
{
NamespaceMap::iterator aIter( maNamespaceMap.find( rNamespaceURL ) );
if( aIter != maNamespaceMap.end() )
return (*aIter).second;
else
return FastToken::DONTKNOW;
}
OUString FastSaxParserImpl::GetNamespaceURL( const OString& rPrefix ) throw (SAXException)
{
Entity& rEntity = getEntity();
if( !rEntity.maNamespaceCount.empty() )
{
sal_uInt32 nNamespace = rEntity.maNamespaceCount.top();
while( nNamespace-- )
if( rEntity.maNamespaceDefines[nNamespace]->maPrefix == rPrefix )
return rEntity.maNamespaceDefines[nNamespace]->maNamespaceURL;
}
throw SAXException("No namespace defined for " + OUString::fromUtf8(rPrefix),
Reference< XInterface >(), Any());
}
sal_Int32 FastSaxParserImpl::GetTokenWithContextNamespace( sal_Int32 nNamespaceToken, const xmlChar* pName, int nNameLen )
{
if( nNamespaceToken != FastToken::DONTKNOW )
{
sal_Int32 nNameToken = GetToken( pName, nNameLen );
if( nNameToken != FastToken::DONTKNOW )
return nNamespaceToken | nNameToken;
}
return FastToken::DONTKNOW;
}
/***************
*
* parseStream does Parser-startup initializations. The FastSaxParser::parse() method does
* the file-specific initialization work. (During a parser run, external files may be opened)
*
****************/
void FastSaxParserImpl::parseStream(const InputSource& maStructSource)
throw (SAXException, IOException, RuntimeException, std::exception)
{
xmlInitParser();
// Only one text at one time
MutexGuard guard( maMutex );
Entity entity( maData );
entity.maStructSource = maStructSource;
if( !entity.mxTokenHandler.is() )
throw SAXException("No token handler, use setTokenHandler()", Reference< XInterface >(), Any() );
if( !entity.maStructSource.aInputStream.is() )
throw SAXException("No input source", Reference< XInterface >(), Any() );
entity.maConverter.setInputStream( entity.maStructSource.aInputStream );
if( !entity.maStructSource.sEncoding.isEmpty() )
entity.maConverter.setEncoding( OUStringToOString( entity.maStructSource.sEncoding, RTL_TEXTENCODING_ASCII_US ) );
pushEntity( entity );
Entity& rEntity = getEntity();
try
{
// start the document
if( rEntity.mxDocumentHandler.is() )
{
Reference< XLocator > xLoc( mxDocumentLocator.get() );
rEntity.mxDocumentHandler->setDocumentLocator( xLoc );
rEntity.mxDocumentHandler->startDocument();
}
rEntity.mbEnableThreads = (rEntity.maStructSource.aInputStream->available() > 10000);
if (rEntity.mbEnableThreads)
{
rtl::Reference<ParserThread> xParser;
xParser = new ParserThread(this);
xParser->launch();
bool done = false;
do {
rEntity.maConsumeResume.wait();
rEntity.maConsumeResume.reset();
osl::ResettableMutexGuard aGuard(rEntity.maEventProtector);
while (!rEntity.maPendingEvents.empty())
{
if (rEntity.maPendingEvents.size() <= rEntity.mnEventLowWater)
rEntity.maProduceResume.set(); // start producer again
EventList *pEventList = rEntity.maPendingEvents.front();
rEntity.maPendingEvents.pop();
aGuard.clear(); // unlock
if (!consume(pEventList))
done = true;
aGuard.reset(); // lock
rEntity.maUsedEvents.push(pEventList);
}
} while (!done);
xParser->join();
deleteUsedEvents();
}
else
{
parse();
}
// finish document
if( rEntity.mxDocumentHandler.is() )
{
rEntity.mxDocumentHandler->endDocument();
}
}
catch (const SAXException&)
{
// TODO free mpParser.myDoc ?
xmlFreeParserCtxt( rEntity.mpParser );
popEntity();
throw;
}
catch (const IOException&)
{
xmlFreeParserCtxt( rEntity.mpParser );
popEntity();
throw;
}
catch (const RuntimeException&)
{
xmlFreeParserCtxt( rEntity.mpParser );
popEntity();
throw;
}
xmlFreeParserCtxt( rEntity.mpParser );
popEntity();
}
void FastSaxParserImpl::setFastDocumentHandler( const Reference< XFastDocumentHandler >& Handler ) throw (RuntimeException)
{
maData.mxDocumentHandler = Handler;
}
void FastSaxParserImpl::setTokenHandler( const Reference< XFastTokenHandler >& xHandler ) throw (RuntimeException)
{
maData.mxTokenHandler = xHandler;
maData.mpTokenHandler = dynamic_cast< FastTokenHandlerBase *>( xHandler.get() );
}
void FastSaxParserImpl::registerNamespace( const OUString& NamespaceURL, sal_Int32 NamespaceToken ) throw (IllegalArgumentException, RuntimeException)
{
if( NamespaceToken >= FastToken::NAMESPACE )
{
if( GetNamespaceToken( NamespaceURL ) == FastToken::DONTKNOW )
{
maNamespaceMap[ NamespaceURL ] = NamespaceToken;
return;
}
}
throw IllegalArgumentException();
}
OUString FastSaxParserImpl::getNamespaceURL( const OUString& rPrefix ) throw(IllegalArgumentException, RuntimeException)
{
try
{
return GetNamespaceURL( OUStringToOString( rPrefix, RTL_TEXTENCODING_UTF8 ) );
}
catch (const Exception&)
{
}
throw IllegalArgumentException();
}
void FastSaxParserImpl::setErrorHandler(const Reference< XErrorHandler > & Handler) throw (RuntimeException)
{
maData.mxErrorHandler = Handler;
}
void FastSaxParserImpl::setEntityResolver(const Reference < XEntityResolver > & Resolver) throw (RuntimeException)
{
maData.mxEntityResolver = Resolver;
}
void FastSaxParserImpl::setLocale( const lang::Locale & Locale ) throw (RuntimeException)
{
maData.maLocale = Locale;
}
void FastSaxParserImpl::deleteUsedEvents()
{
Entity& rEntity = getEntity();
osl::ResettableMutexGuard aGuard(rEntity.maEventProtector);
while (!rEntity.maUsedEvents.empty())
{
EventList *pEventList = rEntity.maUsedEvents.front();
rEntity.maUsedEvents.pop();
aGuard.clear(); // unlock
delete pEventList;
aGuard.reset(); // lock
}
}
void FastSaxParserImpl::produce( bool bForceFlush )
{
Entity& rEntity = getEntity();
if (bForceFlush ||
rEntity.mnProducedEventsSize == rEntity.mnEventListSize)
{
osl::ResettableMutexGuard aGuard(rEntity.maEventProtector);
while (rEntity.maPendingEvents.size() >= rEntity.mnEventHighWater)
{ // pause parsing for a bit
aGuard.clear(); // unlock
rEntity.maProduceResume.wait();
rEntity.maProduceResume.reset();
aGuard.reset(); // lock
}
rEntity.maPendingEvents.push(rEntity.mpProducedEvents);
rEntity.mpProducedEvents = nullptr;
aGuard.clear(); // unlock
rEntity.maConsumeResume.set();
}
}
bool FastSaxParserImpl::consume(EventList *pEventList)
{
Entity& rEntity = getEntity();
for (EventList::iterator aEventIt = pEventList->begin();
aEventIt != pEventList->end(); ++aEventIt)
{
switch ((*aEventIt).maType)
{
case START_ELEMENT:
rEntity.startElement( &(*aEventIt) );
break;
case END_ELEMENT:
rEntity.endElement();
break;
case CHARACTERS:
rEntity.characters( (*aEventIt).msChars );
break;
case DONE:
return false;
case EXCEPTION:
rEntity.throwException( mxDocumentLocator, false );
return false;
default:
assert(false);
return false;
}
}
return true;
}
void FastSaxParserImpl::pushEntity( const Entity& rEntity )
{
maEntities.push( rEntity );
mpTop = &maEntities.top();
}
void FastSaxParserImpl::popEntity()
{
maEntities.pop();
mpTop = !maEntities.empty() ? &maEntities.top() : nullptr;
}
// starts parsing with actual parser !
void FastSaxParserImpl::parse()
{
const int BUFFER_SIZE = 16 * 1024;
Sequence< sal_Int8 > seqOut( BUFFER_SIZE );
Entity& rEntity = getEntity();
// set all necessary C-Callbacks
static xmlSAXHandler callbacks;
callbacks.startElementNs = call_callbackStartElement;
callbacks.endElementNs = call_callbackEndElement;
callbacks.characters = call_callbackCharacters;
callbacks.initialized = XML_SAX2_MAGIC;
#if 0
XML_SetEntityDeclHandler(entity.mpParser, call_callbackEntityDecl);
XML_SetExternalEntityRefHandler( entity.mpParser, call_callbackExternalEntityRef );
#endif
int nRead = 0;
do
{
nRead = rEntity.maConverter.readAndConvert( seqOut, BUFFER_SIZE );
if( nRead <= 0 )
{
if( rEntity.mpParser != nullptr )
{
if( xmlParseChunk( rEntity.mpParser, reinterpret_cast<const char*>(seqOut.getConstArray()), 0, 1 ) != XML_ERR_OK )
rEntity.throwException( mxDocumentLocator, true );
}
break;
}
bool bContinue = true;
if( rEntity.mpParser == nullptr )
{
// create parser with proper encoding (needs the first chunk of data)
rEntity.mpParser = xmlCreatePushParserCtxt( &callbacks, this,
reinterpret_cast<const char*>(seqOut.getConstArray()), nRead, nullptr );
if( !rEntity.mpParser )
throw SAXException("Couldn't create parser", Reference< XInterface >(), Any() );
// Tell libxml2 parser to decode entities in attribute values.
xmlCtxtUseOptions(rEntity.mpParser, XML_PARSE_NOENT);
}
else
{
bContinue = xmlParseChunk( rEntity.mpParser, reinterpret_cast<const char*>(seqOut.getConstArray()), nRead, 0 )
== XML_ERR_OK;
}
// callbacks used inside XML_Parse may have caught an exception
if( !bContinue || rEntity.maSavedException.hasValue() )
rEntity.throwException( mxDocumentLocator, true );
} while( nRead > 0 );
rEntity.getEvent( DONE );
if( rEntity.mbEnableThreads )
produce( true );
}
// The C-Callbacks
void FastSaxParserImpl::callbackStartElement(const xmlChar *localName , const xmlChar* prefix, const xmlChar* URI,
int numNamespaces, const xmlChar** namespaces, int numAttributes, int /*defaultedAttributes*/, const xmlChar **attributes)
{
if (!pendingCharacters.isEmpty())
sendPendingCharacters();
Entity& rEntity = getEntity();
if( rEntity.maNamespaceCount.empty() )
{
rEntity.maNamespaceCount.push(0);
DefineNamespace( OString("xml"), "http://www.w3.org/XML/1998/namespace");
}
else
{
rEntity.maNamespaceCount.push( rEntity.maNamespaceCount.top() );
}
// create attribute map and process namespace instructions
Event& rEvent = getEntity().getEvent( START_ELEMENT );
if (rEvent.mxAttributes.is())
rEvent.mxAttributes->clear();
else
rEvent.mxAttributes.set(
new FastAttributeList( rEntity.mxTokenHandler,
rEntity.mpTokenHandler ) );
sal_Int32 nNamespaceToken = FastToken::DONTKNOW;
if (!rEntity.maNamespaceStack.empty())
{
rEvent.msNamespace = rEntity.maNamespaceStack.top().msName;
nNamespaceToken = rEntity.maNamespaceStack.top().mnToken;
}
try
{
/* #158414# Each element may define new namespaces, also for attribues.
First, process all namespaces, second, process the attributes after namespaces
have been initialized. */
// #158414# first: get namespaces
for (int i = 0; i < numNamespaces * 2; i += 2)
{
// namespaces[] is (prefix/URI)
if( namespaces[ i ] != nullptr )
{
DefineNamespace( OString( XML_CAST( namespaces[ i ] )),
OUString( XML_CAST( namespaces[ i + 1 ] ), strlen( XML_CAST( namespaces[ i + 1 ] )), RTL_TEXTENCODING_UTF8 ));
}
else
{
// default namespace
rEvent.msNamespace = OUString( XML_CAST( namespaces[ i + 1 ] ), strlen( XML_CAST( namespaces[ i + 1 ] )), RTL_TEXTENCODING_UTF8 );
nNamespaceToken = GetNamespaceToken( rEvent.msNamespace );
}
}
// #158414# second: fill attribute list with other attributes
for (int i = 0; i < numAttributes * 5; i += 5)
{
if( attributes[ i + 1 ] != nullptr )
{
sal_Int32 nAttributeToken = GetTokenWithPrefix( attributes[ i + 1 ], strlen( XML_CAST( attributes[ i + 1 ] )), attributes[ i ], strlen( XML_CAST( attributes[ i ] )));
if( nAttributeToken != FastToken::DONTKNOW )
rEvent.mxAttributes->add( nAttributeToken, XML_CAST( attributes[ i + 3 ] ), attributes[ i + 4 ] - attributes[ i + 3 ] );
else
rEvent.mxAttributes->addUnknown( OUString( XML_CAST( attributes[ i + 2 ] ), strlen( XML_CAST( attributes[ i + 2 ] )), RTL_TEXTENCODING_UTF8 ),
OString( XML_CAST( attributes[ i ] )), OString( XML_CAST( attributes[ i + 3 ] ), attributes[ i + 4 ] - attributes[ i + 3 ] ));
}
else
{
sal_Int32 nAttributeToken = GetToken( attributes[ i ], strlen( XML_CAST( attributes[ i ] )));
if( nAttributeToken != FastToken::DONTKNOW )
rEvent.mxAttributes->add( nAttributeToken, XML_CAST( attributes[ i + 3 ] ), attributes[ i + 4 ] - attributes[ i + 3 ] );
else
rEvent.mxAttributes->addUnknown( XML_CAST( attributes[ i ] ),
OString( XML_CAST( attributes[ i + 3 ] ), attributes[ i + 4 ] - attributes[ i + 3 ] ));
}
}
if( prefix != nullptr )
rEvent.mnElementToken = GetTokenWithPrefix( prefix, strlen( XML_CAST( prefix )), localName, strlen( XML_CAST( localName )));
else if( !rEvent.msNamespace.isEmpty() )
rEvent.mnElementToken = GetTokenWithContextNamespace( nNamespaceToken, localName, strlen( XML_CAST( localName )));
else
rEvent.mnElementToken = GetToken( localName, strlen( XML_CAST( localName )));
if( rEvent.mnElementToken == FastToken::DONTKNOW )
{
if( prefix != nullptr )
{
rEvent.msNamespace = OUString( XML_CAST( URI ), strlen( XML_CAST( URI )), RTL_TEXTENCODING_UTF8 );
nNamespaceToken = GetNamespaceToken( rEvent.msNamespace );
}
rEvent.msElementName = OUString( XML_CAST( localName ), strlen( XML_CAST( localName )), RTL_TEXTENCODING_UTF8 );
}
else // token is always preferred.
rEvent.msElementName.clear();
rEntity.maNamespaceStack.push( NameWithToken(rEvent.msNamespace, nNamespaceToken) );
if (rEntity.mbEnableThreads)
produce();
else
rEntity.startElement( &rEvent );
}
catch (const Exception&)
{
rEntity.saveException( ::cppu::getCaughtException() );
}
}
void FastSaxParserImpl::callbackEndElement( const xmlChar*, const xmlChar*, const xmlChar* )
{
if (!pendingCharacters.isEmpty())
sendPendingCharacters();
Entity& rEntity = getEntity();
SAL_WARN_IF(rEntity.maNamespaceCount.empty(), "sax", "Empty NamespaceCount");
if( !rEntity.maNamespaceCount.empty() )
rEntity.maNamespaceCount.pop();
SAL_WARN_IF(rEntity.maNamespaceStack.empty(), "sax", "Empty NamespaceStack");
if( !rEntity.maNamespaceStack.empty() )
rEntity.maNamespaceStack.pop();
rEntity.getEvent( END_ELEMENT );
if (rEntity.mbEnableThreads)
produce();
else
rEntity.endElement();
}
void FastSaxParserImpl::callbackCharacters( const xmlChar* s, int nLen )
{
// SAX interface allows that the characters callback splits content of one XML node
// (e.g. because there's an entity that needs decoding), however for consumers it's
// simpler FastSaxParser's character callback provides the whole string at once,
// so merge data from possible multiple calls and send them at once (before the element
// ends or another one starts).
pendingCharacters += OUString( XML_CAST( s ), nLen, RTL_TEXTENCODING_UTF8 );
}
void FastSaxParserImpl::sendPendingCharacters()
{
Entity& rEntity = getEntity();
Event& rEvent = rEntity.getEvent( CHARACTERS );
rEvent.msChars = pendingCharacters;
pendingCharacters.clear();
if (rEntity.mbEnableThreads)
produce();
else
rEntity.characters( rEvent.msChars );
}
#if 0
void FastSaxParserImpl::callbackEntityDecl(
SAL_UNUSED_PARAMETER const xmlChar * /*entityName*/,
SAL_UNUSED_PARAMETER int /*is_parameter_entity*/,
const xmlChar *value, SAL_UNUSED_PARAMETER int /*value_length*/,
SAL_UNUSED_PARAMETER const xmlChar * /*base*/,
SAL_UNUSED_PARAMETER const xmlChar * /*systemId*/,
SAL_UNUSED_PARAMETER const xmlChar * /*publicId*/,
SAL_UNUSED_PARAMETER const xmlChar * /*notationName*/)
{
if (value) { // value != 0 means internal entity
SAL_INFO("sax", "FastSaxParser: internal entity declaration, stopping");
XML_StopParser(getEntity().mpParser, XML_FALSE);
getEntity().saveException( SAXParseException(
"FastSaxParser: internal entity declaration, stopping",
static_cast<OWeakObject*>(mpFront), Any(),
mxDocumentLocator->getPublicId(),
mxDocumentLocator->getSystemId(),
mxDocumentLocator->getLineNumber(),
mxDocumentLocator->getColumnNumber() ) );
} else {
SAL_INFO("sax", "FastSaxParser: ignoring external entity declaration");
}
}
bool FastSaxParserImpl::callbackExternalEntityRef(
XML_Parser parser, const xmlChar *context,
SAL_UNUSED_PARAMETER const xmlChar * /*base*/, const xmlChar *systemId,
const xmlChar *publicId )
{
bool bOK = true;
InputSource source;
Entity& rCurrEntity = getEntity();
Entity aNewEntity( rCurrEntity );
if( rCurrEntity.mxEntityResolver.is() ) try
{
aNewEntity.maStructSource = rCurrEntity.mxEntityResolver->resolveEntity(
OUString( publicId, strlen( publicId ), RTL_TEXTENCODING_UTF8 ) ,
OUString( systemId, strlen( systemId ), RTL_TEXTENCODING_UTF8 ) );
}
catch (const SAXParseException & e)
{
rCurrEntity.saveException( e );
bOK = false;
}
catch (const SAXException& e)
{
rCurrEntity.saveException( SAXParseException(
e.Message, e.Context, e.WrappedException,
mxDocumentLocator->getPublicId(),
mxDocumentLocator->getSystemId(),
mxDocumentLocator->getLineNumber(),
mxDocumentLocator->getColumnNumber() ) );
bOK = false;
}
if( aNewEntity.maStructSource.aInputStream.is() )
{
aNewEntity.mpParser = XML_ExternalEntityParserCreate( parser, context, 0 );
if( !aNewEntity.mpParser )
{
return false;
}
aNewEntity.maConverter.setInputStream( aNewEntity.maStructSource.aInputStream );
pushEntity( aNewEntity );
try
{
parse();
}
catch (const SAXParseException& e)
{
rCurrEntity.saveException( e );
bOK = false;
}
catch (const IOException& e)
{
SAXException aEx;
aEx.WrappedException <<= e;
rCurrEntity.saveException( aEx );
bOK = false;
}
catch (const RuntimeException& e)
{
SAXException aEx;
aEx.WrappedException <<= e;
rCurrEntity.saveException( aEx );
bOK = false;
}
popEntity();
XML_ParserFree( aNewEntity.mpParser );
}
return bOK;
}
#endif
FastSaxParser::FastSaxParser() : mpImpl(new FastSaxParserImpl(this)) {}
FastSaxParser::~FastSaxParser()
{
}
void FastSaxParser::parseStream( const xml::sax::InputSource& aInputSource )
throw (xml::sax::SAXException, io::IOException,
uno::RuntimeException, std::exception)
{
mpImpl->parseStream(aInputSource);
}
void FastSaxParser::setFastDocumentHandler( const uno::Reference<xml::sax::XFastDocumentHandler>& Handler )
throw (uno::RuntimeException, std::exception)
{
mpImpl->setFastDocumentHandler(Handler);
}
void FastSaxParser::setTokenHandler( const uno::Reference<xml::sax::XFastTokenHandler>& Handler )
throw (uno::RuntimeException, std::exception)
{
mpImpl->setTokenHandler(Handler);
}
void FastSaxParser::registerNamespace( const OUString& NamespaceURL, sal_Int32 NamespaceToken )
throw (lang::IllegalArgumentException, uno::RuntimeException, std::exception)
{
mpImpl->registerNamespace(NamespaceURL, NamespaceToken);
}
OUString FastSaxParser::getNamespaceURL( const OUString& rPrefix )
throw(lang::IllegalArgumentException, uno::RuntimeException, std::exception)
{
return mpImpl->getNamespaceURL(rPrefix);
}
void FastSaxParser::setErrorHandler( const uno::Reference< xml::sax::XErrorHandler >& Handler )
throw (uno::RuntimeException, std::exception)
{
mpImpl->setErrorHandler(Handler);
}
void FastSaxParser::setEntityResolver( const uno::Reference< xml::sax::XEntityResolver >& Resolver )
throw (uno::RuntimeException, std::exception)
{
mpImpl->setEntityResolver(Resolver);
}
void FastSaxParser::setLocale( const lang::Locale& rLocale )
throw (uno::RuntimeException, std::exception)
{
mpImpl->setLocale(rLocale);
}
OUString FastSaxParser::getImplementationName()
throw (uno::RuntimeException, std::exception)
{
return OUString("com.sun.star.comp.extensions.xml.sax.FastParser");
}
sal_Bool FastSaxParser::supportsService( const OUString& ServiceName )
throw (uno::RuntimeException, std::exception)
{
return cppu::supportsService(this, ServiceName);
}
uno::Sequence<OUString> FastSaxParser::getSupportedServiceNames()
throw (uno::RuntimeException, std::exception)
{
Sequence<OUString> seq { "com.sun.star.xml.sax.FastParser" };
return seq;
}
} // namespace sax_fastparser
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface * SAL_CALL
com_sun_star_comp_extensions_xml_sax_FastParser_get_implementation(
css::uno::XComponentContext *,
css::uno::Sequence<css::uno::Any> const &)
{
return cppu::acquire(new FastSaxParser);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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