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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 "oox/core/recordparser.hxx"
#include <vector>
#include <com/sun/star/lang/DisposedException.hpp>
#include <com/sun/star/xml/sax/XLocator.hpp>
#include <cppuhelper/implbase1.hxx>
#include "oox/core/fragmenthandler.hxx"
namespace oox {
namespace core {
using namespace ::com::sun::star::io;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::xml::sax;
namespace prv {
class Locator : public ::cppu::WeakImplHelper1< XLocator >
{
public:
inline explicit Locator( RecordParser* pParser ) : mpParser( pParser ) {}
void dispose();
void checkDispose() throw( RuntimeException );
// com.sun.star.sax.XLocator interface
virtual sal_Int32 SAL_CALL getColumnNumber() throw( RuntimeException, std::exception );
virtual sal_Int32 SAL_CALL getLineNumber() throw( RuntimeException, std::exception );
virtual OUString SAL_CALL getPublicId() throw( RuntimeException, std::exception );
virtual OUString SAL_CALL getSystemId() throw( RuntimeException, std::exception );
private:
RecordParser* mpParser;
};
void Locator::dispose()
{
mpParser = 0;
}
void Locator::checkDispose() throw( RuntimeException )
{
if( !mpParser )
throw DisposedException();
}
sal_Int32 SAL_CALL Locator::getColumnNumber() throw( RuntimeException, std::exception )
{
return -1;
}
sal_Int32 SAL_CALL Locator::getLineNumber() throw( RuntimeException, std::exception )
{
return -1;
}
OUString SAL_CALL Locator::getPublicId() throw( RuntimeException, std::exception )
{
checkDispose();
return mpParser->getInputSource().maPublicId;
}
OUString SAL_CALL Locator::getSystemId() throw( RuntimeException, std::exception )
{
checkDispose();
return mpParser->getInputSource().maSystemId;
}
class ContextStack
{
public:
explicit ContextStack( FragmentHandlerRef xHandler );
inline bool empty() const { return maStack.empty(); }
sal_Int32 getCurrentRecId() const;
bool hasCurrentEndRecId() const;
ContextHandlerRef getCurrentContext() const;
void pushContext( const RecordInfo& rRec, const ContextHandlerRef& rxContext );
void popContext();
private:
typedef ::std::pair< RecordInfo, ContextHandlerRef > ContextInfo;
typedef ::std::vector< ContextInfo > ContextInfoVec;
FragmentHandlerRef mxHandler;
ContextInfoVec maStack;
};
ContextStack::ContextStack( FragmentHandlerRef xHandler ) :
mxHandler( xHandler )
{
}
sal_Int32 ContextStack::getCurrentRecId() const
{
return maStack.empty() ? -1 : maStack.back().first.mnStartRecId;
}
bool ContextStack::hasCurrentEndRecId() const
{
return !maStack.empty() && (maStack.back().first.mnEndRecId >= 0);
}
ContextHandlerRef ContextStack::getCurrentContext() const
{
if( !maStack.empty() )
return maStack.back().second;
return mxHandler.get();
}
void ContextStack::pushContext( const RecordInfo& rRecInfo, const ContextHandlerRef& rxContext )
{
OSL_ENSURE( (rRecInfo.mnEndRecId >= 0) || maStack.empty() || hasCurrentEndRecId(),
"ContextStack::pushContext - nested incomplete context record identifiers" );
maStack.push_back( ContextInfo( rRecInfo, rxContext ) );
}
void ContextStack::popContext()
{
OSL_ENSURE( !maStack.empty(), "ContextStack::popContext - no context on stack" );
if( !maStack.empty() )
{
ContextInfo& rContextInfo = maStack.back();
if( rContextInfo.second.is() )
rContextInfo.second->endRecord( rContextInfo.first.mnStartRecId );
maStack.pop_back();
}
}
} // namespace prv
namespace {
/** Reads a byte from the passed stream, returns true on success. */
inline bool lclReadByte( sal_uInt8& ornByte, BinaryInputStream& rStrm )
{
return rStrm.readMemory( &ornByte, 1 ) == 1;
}
/** Reads a compressed signed 32-bit integer from the passed stream. */
bool lclReadCompressedInt( sal_Int32& ornValue, BinaryInputStream& rStrm )
{
ornValue = 0;
sal_uInt8 nByte;
if( !lclReadByte( nByte, rStrm ) ) return false;
ornValue = nByte & 0x7F;
if( (nByte & 0x80) == 0 ) return true;
if( !lclReadByte( nByte, rStrm ) ) return false;
ornValue |= sal_Int32( nByte & 0x7F ) << 7;
if( (nByte & 0x80) == 0 ) return true;
if( !lclReadByte( nByte, rStrm ) ) return false;
ornValue |= sal_Int32( nByte & 0x7F ) << 14;
if( (nByte & 0x80) == 0 ) return true;
if( !lclReadByte( nByte, rStrm ) ) return false;
ornValue |= sal_Int32( nByte & 0x7F ) << 21;
return true;
}
bool lclReadRecordHeader( sal_Int32& ornRecId, sal_Int32& ornRecSize, BinaryInputStream& rStrm )
{
return
lclReadCompressedInt( ornRecId, rStrm ) && (ornRecId >= 0) &&
lclReadCompressedInt( ornRecSize, rStrm ) && (ornRecSize >= 0);
}
bool lclReadNextRecord( sal_Int32& ornRecId, StreamDataSequence& orData, BinaryInputStream& rStrm )
{
sal_Int32 nRecSize = 0;
bool bValid = lclReadRecordHeader( ornRecId, nRecSize, rStrm );
if( bValid )
{
orData.realloc( nRecSize );
bValid = (nRecSize == 0) || (rStrm.readData( orData, nRecSize ) == nRecSize);
}
return bValid;
}
} // namespace
RecordParser::RecordParser()
{
mxLocator.set( new prv::Locator( this ) );
}
RecordParser::~RecordParser()
{
if( mxLocator.is() )
mxLocator->dispose();
}
void RecordParser::setFragmentHandler( const ::rtl::Reference< FragmentHandler >& rxHandler )
{
mxHandler = rxHandler;
// build record infos
maStartMap.clear();
maEndMap.clear();
const RecordInfo* pRecs = mxHandler.is() ? mxHandler->getRecordInfos() : 0;
OSL_ENSURE( pRecs, "RecordInfoProvider::RecordInfoProvider - missing record list" );
for( ; pRecs && pRecs->mnStartRecId >= 0; ++pRecs )
{
maStartMap[ pRecs->mnStartRecId ] = *pRecs;
if( pRecs->mnEndRecId >= 0 )
maEndMap[ pRecs->mnEndRecId ] = *pRecs;
}
}
void RecordParser::parseStream( const RecordInputSource& rInputSource ) throw( SAXException, IOException, RuntimeException )
{
maSource = rInputSource;
if( !maSource.mxInStream || maSource.mxInStream->isEof() )
throw IOException();
if( !mxHandler.is() )
throw SAXException();
// start the document
Reference< XLocator > xLocator( mxLocator.get() );
mxHandler->setDocumentLocator( xLocator );
mxHandler->startDocument();
// parse the stream
mxStack.reset( new prv::ContextStack( mxHandler ) );
sal_Int32 nRecId = 0;
StreamDataSequence aRecData;
while( lclReadNextRecord( nRecId, aRecData, *maSource.mxInStream ) )
{
// create record stream object from imported record data
SequenceInputStream aRecStrm( aRecData );
// try to leave a context, there may be other incomplete contexts on the stack
if( const RecordInfo* pEndRecInfo = getEndRecordInfo( nRecId ) )
{
// finalize contexts without record identifier for context end
while( !mxStack->empty() && !mxStack->hasCurrentEndRecId() )
mxStack->popContext();
// finalize the current context and pop context info from stack
OSL_ENSURE( mxStack->getCurrentRecId() == pEndRecInfo->mnStartRecId, "RecordParser::parseStream - context records mismatch" );
(void)pEndRecInfo; // suppress compiler warning for unused variable
ContextHandlerRef xCurrContext = mxStack->getCurrentContext();
if( xCurrContext.is() )
{
// context end record may contain some data, handle it as simple record
aRecStrm.seekToStart();
xCurrContext->startRecord( nRecId, aRecStrm );
xCurrContext->endRecord( nRecId );
}
mxStack->popContext();
}
else
{
// end context with incomplete record id, if the same id comes again
if( (mxStack->getCurrentRecId() == nRecId) && !mxStack->hasCurrentEndRecId() )
mxStack->popContext();
// try to start a new context
ContextHandlerRef xCurrContext = mxStack->getCurrentContext();
if( xCurrContext.is() )
{
aRecStrm.seekToStart();
xCurrContext = xCurrContext->createRecordContext( nRecId, aRecStrm );
}
// track all context identifiers on the stack (do not push simple records)
const RecordInfo* pStartRecInfo = getStartRecordInfo( nRecId );
if( pStartRecInfo )
mxStack->pushContext( *pStartRecInfo, xCurrContext );
// import the record
if( xCurrContext.is() )
{
// import the record
aRecStrm.seekToStart();
xCurrContext->startRecord( nRecId, aRecStrm );
// end simple records (context records are finished in ContextStack::popContext)
if( !pStartRecInfo )
xCurrContext->endRecord( nRecId );
}
}
}
// close remaining contexts (missing context end records or stream error)
while( !mxStack->empty() )
mxStack->popContext();
mxStack.reset();
// finish document
mxHandler->endDocument();
maSource = RecordInputSource();
}
const RecordInfo* RecordParser::getStartRecordInfo( sal_Int32 nRecId ) const
{
RecordInfoMap::const_iterator aIt = maStartMap.find( nRecId );
return (aIt == maStartMap.end()) ? 0 : &aIt->second;
}
const RecordInfo* RecordParser::getEndRecordInfo( sal_Int32 nRecId ) const
{
RecordInfoMap::const_iterator aIt = maEndMap.find( nRecId );
return (aIt == maEndMap.end()) ? 0 : &aIt->second;
}
} // namespace core
} // namespace oox
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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