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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: axbinaryreader.cxx,v $
* $Revision: 1.1 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "oox/ole/axbinaryreader.hxx"
#include "oox/ole/olehelper.hxx"
using ::rtl::OUString;
namespace oox {
namespace ole {
// ============================================================================
namespace {
const sal_uInt32 AX_STRING_SIZEMASK = 0x7FFFFFFF;
const sal_uInt32 AX_STRING_COMPRESSED = 0x80000000;
} // namespace
// ============================================================================
AxAlignedInputStream::AxAlignedInputStream( BinaryInputStream& rInStrm ) :
mrInStrm( rInStrm ),
mnStrmPos( 0 )
{
}
sal_Int64 AxAlignedInputStream::tell() const
{
return mnStrmPos;
}
void AxAlignedInputStream::seek( sal_Int64 nPos )
{
mbEof = mbEof || (nPos < mnStrmPos);
if( !mbEof )
skip( static_cast< sal_Int32 >( nPos - mnStrmPos ) );
}
sal_Int32 AxAlignedInputStream::readData( StreamDataSequence& orData, sal_Int32 nBytes )
{
sal_Int32 nReadSize = mrInStrm.readData( orData, nBytes );
mnStrmPos += nReadSize;
return nReadSize;
}
sal_Int32 AxAlignedInputStream::readMemory( void* opMem, sal_Int32 nBytes )
{
sal_Int32 nReadSize = mrInStrm.readMemory( opMem, nBytes );
mnStrmPos += nReadSize;
return nReadSize;
}
void AxAlignedInputStream::skip( sal_Int32 nBytes )
{
mrInStrm.skip( nBytes );
mnStrmPos += nBytes;
}
void AxAlignedInputStream::align( size_t nSize )
{
skip( static_cast< sal_Int32 >( (nSize - (mnStrmPos % nSize)) % nSize ) );
}
// ============================================================================
AxBinaryPropertyReader::ComplexProperty::~ComplexProperty()
{
}
bool AxBinaryPropertyReader::PairProperty::readProperty( AxAlignedInputStream& rInStrm )
{
rInStrm >> mrnValue1 >> mrnValue2;
return true;
}
bool AxBinaryPropertyReader::StringProperty::readProperty( AxAlignedInputStream& rInStrm )
{
bool bCompressed = getFlag( mnSize, AX_STRING_COMPRESSED );
sal_uInt32 nBufSize = mnSize & AX_STRING_SIZEMASK;
sal_Int64 nEndPos = rInStrm.tell() + nBufSize;
sal_Int32 nChars = static_cast< sal_Int32 >( nBufSize / (bCompressed ? 1 : 2) );
bool bValidChars = nChars <= 65536;
OSL_ENSURE( bValidChars, "StringProperty::readProperty - string too long" );
nChars = ::std::min< sal_Int32 >( nChars, 65536 );
mrValue = bCompressed ?
// ISO-8859-1 maps all byte values xx to the same Unicode code point U+00xx
rInStrm.readCharArrayUC( nChars, RTL_TEXTENCODING_ISO_8859_1 ) :
rInStrm.readUnicodeArray( nChars );
rInStrm.seek( nEndPos );
return bValidChars;
}
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.readValue< sal_uInt16 >();
mnPropsEnd = maInStrm.tell() + nBlockSize;
// flagfield containing existing properties
if( b64BitPropFlags )
maInStrm >> mnPropFlags;
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( sal_Int32& ornValue1, sal_Int32& ornValue2 )
{
if( startNextProperty() )
maLargeProps.push_back( ComplexPropVector::value_type( new PairProperty( ornValue1, ornValue2 ) ) );
}
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::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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