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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/ole/axbinaryreader.hxx>
#include <oox/ole/axfontdata.hxx>
#include <oox/ole/olehelper.hxx>
#include <osl/diagnose.h>
namespace oox {
namespace ole {
namespace {
const sal_uInt32 AX_STRING_SIZEMASK = 0x7FFFFFFF;
const sal_uInt32 AX_STRING_COMPRESSED = 0x80000000;
} // namespace
AxAlignedInputStream::AxAlignedInputStream( BinaryInputStream& rInStrm ) :
BinaryStreamBase( false ),
mpInStrm( &rInStrm ),
mnStrmPos( 0 ),
mnStrmSize( rInStrm.getRemaining() )
{
mbEof = mbEof || rInStrm.isEof();
}
sal_Int64 AxAlignedInputStream::size() const
{
return mpInStrm ? mnStrmSize : -1;
}
sal_Int64 AxAlignedInputStream::tell() const
{
return mpInStrm ? mnStrmPos : -1;
}
void AxAlignedInputStream::seek( sal_Int64 nPos )
{
mbEof = mbEof || (nPos < mnStrmPos);
if( !mbEof )
skip( static_cast< sal_Int32 >( nPos - mnStrmPos ) );
}
void AxAlignedInputStream::close()
{
mpInStrm = nullptr;
mbEof = true;
}
sal_Int32 AxAlignedInputStream::readData( StreamDataSequence& orData, sal_Int32 nBytes, size_t nAtomSize )
{
sal_Int32 nReadSize = 0;
if( !mbEof )
{
nReadSize = mpInStrm->readData( orData, nBytes, nAtomSize );
mnStrmPos += nReadSize;
mbEof = mpInStrm->isEof();
}
return nReadSize;
}
sal_Int32 AxAlignedInputStream::readMemory( void* opMem, sal_Int32 nBytes, size_t nAtomSize )
{
sal_Int32 nReadSize = 0;
if( !mbEof )
{
nReadSize = mpInStrm->readMemory( opMem, nBytes, nAtomSize );
mnStrmPos += nReadSize;
mbEof = mpInStrm->isEof();
}
return nReadSize;
}
void AxAlignedInputStream::skip( sal_Int32 nBytes, size_t nAtomSize )
{
if( !mbEof )
{
mpInStrm->skip( nBytes, nAtomSize );
mnStrmPos += nBytes;
mbEof = mpInStrm->isEof();
}
}
void AxAlignedInputStream::align( size_t nSize )
{
skip( static_cast< sal_Int32 >( (nSize - (mnStrmPos % nSize)) % nSize ) );
}
namespace {
bool lclReadString( AxAlignedInputStream& rInStrm, OUString& rValue, sal_uInt32 nSize, bool bArrayString )
{
bool bCompressed = getFlag( nSize, AX_STRING_COMPRESSED );
sal_uInt32 nBufSize = nSize & AX_STRING_SIZEMASK;
// Unicode: simple strings store byte count, array strings store char count
sal_Int32 nChars = static_cast< sal_Int32 >( nBufSize / ((bCompressed || bArrayString) ? 1 : 2) );
bool bValidChars = nChars <= 65536;
OSL_ENSURE( bValidChars, "lclReadString - string too long" );
sal_Int64 nEndPos = rInStrm.tell() + nChars * (bCompressed ? 1 : 2);
nChars = ::std::min< sal_Int32 >( nChars, 65536 );
rValue = rInStrm.readCompressedUnicodeArray( nChars, bCompressed );
rInStrm.seek( nEndPos );
return bValidChars;
}
} // namespace
AxBinaryPropertyReader::ComplexProperty::~ComplexProperty()
{
}
bool AxBinaryPropertyReader::PairProperty::readProperty( AxAlignedInputStream& rInStrm )
{
mrPairData.first = rInStrm.readInt32();
mrPairData.second = rInStrm.readInt32();
return true;
}
bool AxBinaryPropertyReader::StringProperty::readProperty( AxAlignedInputStream& rInStrm )
{
return lclReadString( rInStrm, mrValue, mnSize, false );
}
bool AxBinaryPropertyReader::ArrayStringProperty::readProperty( AxAlignedInputStream& rInStrm )
{
sal_Int64 nEndPos = rInStrm.tell() + mnSize;
while( rInStrm.tell() < nEndPos )
{
OUString aString;
if( !lclReadString( rInStrm, aString, rInStrm.readuInt32(), true ) )
return false;
mrArray.push_back( aString );
// every array string is aligned on 4 byte boundries
rInStrm.align( 4 );
}
return true;
}
bool AxBinaryPropertyReader::GuidProperty::readProperty( AxAlignedInputStream& rInStrm )
{
mrGuid = OleHelper::importGuid( rInStrm );
return true;
}
bool AxBinaryPropertyReader::FontProperty::readProperty( AxAlignedInputStream& rInStrm )
{
return mrFontData.importGuidAndFont( rInStrm );
}
bool AxBinaryPropertyReader::PictureProperty::readProperty( AxAlignedInputStream& rInStrm )
{
return OleHelper::importStdPic( mrPicData, rInStrm, true );
}
AxBinaryPropertyReader::AxBinaryPropertyReader( BinaryInputStream& rInStrm, bool b64BitPropFlags ) :
maInStrm( rInStrm ),
mbValid( true )
{
// version and size of property block
maInStrm.skip( 2 );
sal_uInt16 nBlockSize = maInStrm.readuInt16();
mnPropsEnd = maInStrm.tell() + nBlockSize;
// flagfield containing existing properties
if( b64BitPropFlags )
mnPropFlags = maInStrm.readInt64();
else
mnPropFlags = maInStrm.readuInt32();
mnNextProp = 1;
}
void AxBinaryPropertyReader::readBoolProperty( bool& orbValue, bool bReverse )
{
// there is no data, the boolean value is equivalent to the property flag itself
orbValue = startNextProperty() != bReverse;
}
void AxBinaryPropertyReader::readPairProperty( AxPairData& orPairData )
{
if( startNextProperty() )
maLargeProps.push_back( ComplexPropVector::value_type( new PairProperty( orPairData ) ) );
}
void AxBinaryPropertyReader::readStringProperty( OUString& orValue )
{
if( startNextProperty() )
{
sal_uInt32 nSize = maInStrm.readAligned< sal_uInt32 >();
maLargeProps.push_back( ComplexPropVector::value_type( new StringProperty( orValue, nSize ) ) );
}
}
void AxBinaryPropertyReader::readArrayStringProperty( std::vector<OUString>& orValue )
{
if( startNextProperty() )
{
sal_uInt32 nSize = maInStrm.readAligned< sal_uInt32 >();
maLargeProps.push_back( ComplexPropVector::value_type( new ArrayStringProperty( orValue, nSize ) ) );
}
}
void AxBinaryPropertyReader::readGuidProperty( OUString& orGuid )
{
if( startNextProperty() )
maLargeProps.push_back( ComplexPropVector::value_type( new GuidProperty( orGuid ) ) );
}
void AxBinaryPropertyReader::readFontProperty( AxFontData& orFontData )
{
if( startNextProperty() )
{
sal_Int16 nData = maInStrm.readAligned< sal_Int16 >();
if( ensureValid( nData == -1 ) )
maStreamProps.push_back( ComplexPropVector::value_type( new FontProperty( orFontData ) ) );
}
}
void AxBinaryPropertyReader::readPictureProperty( StreamDataSequence& orPicData )
{
if( startNextProperty() )
{
sal_Int16 nData = maInStrm.readAligned< sal_Int16 >();
if( ensureValid( nData == -1 ) )
maStreamProps.push_back( ComplexPropVector::value_type( new PictureProperty( orPicData ) ) );
}
}
bool AxBinaryPropertyReader::finalizeImport()
{
// read large properties
maInStrm.align( 4 );
if( ensureValid( mnPropFlags == 0 ) && !maLargeProps.empty() )
{
for( ComplexPropVector::iterator aIt = maLargeProps.begin(), aEnd = maLargeProps.end(); ensureValid() && (aIt != aEnd); ++aIt )
{
ensureValid( (*aIt)->readProperty( maInStrm ) );
maInStrm.align( 4 );
}
}
maInStrm.seek( mnPropsEnd );
// read stream properties (no stream alignment between properties!)
if( ensureValid() && !maStreamProps.empty() )
for( ComplexPropVector::iterator aIt = maStreamProps.begin(), aEnd = maStreamProps.end(); ensureValid() && (aIt != aEnd); ++aIt )
ensureValid( (*aIt)->readProperty( maInStrm ) );
return mbValid;
}
bool AxBinaryPropertyReader::ensureValid( bool bCondition )
{
mbValid = mbValid && bCondition && !maInStrm.isEof();
return mbValid;
}
bool AxBinaryPropertyReader::startNextProperty()
{
bool bHasProp = getFlag( mnPropFlags, mnNextProp );
setFlag( mnPropFlags, mnNextProp, false );
mnNextProp <<= 1;
return ensureValid() && bHasProp;
}
} // namespace ole
} // namespace oox
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