105 lines
2.9 KiB
C++
105 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/log.hxx>
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#include <tools/stream.hxx>
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#include <tools/zcodec.hxx>
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#include "codec.hxx"
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#include <memory>
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GalleryCodec::GalleryCodec( SvStream& rIOStm ) :
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rStm( rIOStm )
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{
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}
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bool GalleryCodec::IsCoded( SvStream& rStm, sal_uInt32& rVersion )
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{
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const sal_uInt64 nPos = rStm.Tell();
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bool bRet;
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sal_uInt8 cByte1, cByte2, cByte3, cByte4, cByte5, cByte6;
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rStm.ReadUChar( cByte1 ).ReadUChar( cByte2 ).ReadUChar( cByte3 ).ReadUChar( cByte4 ).ReadUChar( cByte5 ).ReadUChar( cByte6 );
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if (rStm.good() && cByte1 == 'S' && cByte2 == 'V' && cByte3 == 'R' && cByte4 == 'L' && cByte5 == 'E' && ( cByte6 == '1' || cByte6 == '2' ) )
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{
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rVersion = ( ( cByte6 == '1' ) ? 1 : 2 );
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bRet = true;
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}
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else
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{
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rVersion = 0;
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bRet = false;
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}
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rStm.Seek( nPos );
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return bRet;
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}
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void GalleryCodec::Write( SvStream& rStmToWrite )
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{
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sal_uInt32 nPos, nCompSize;
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const sal_uInt32 nSize = rStmToWrite.TellEnd();
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rStmToWrite.Seek( 0 );
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rStm.WriteChar( 'S' ).WriteChar( 'V' ).WriteChar( 'R' ).WriteChar( 'L' ).WriteChar( 'E' ).WriteChar( '2' );
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rStm.WriteUInt32( nSize );
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nPos = rStm.Tell();
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rStm.SeekRel( 4 );
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ZCodec aCodec;
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aCodec.BeginCompression();
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aCodec.Compress( rStmToWrite, rStm );
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aCodec.EndCompression();
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nCompSize = rStm.Tell() - nPos - 4;
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rStm.Seek( nPos );
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rStm.WriteUInt32( nCompSize );
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rStm.Seek( STREAM_SEEK_TO_END );
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}
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void GalleryCodec::Read( SvStream& rStmToRead )
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{
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sal_uInt32 nVersion = 0;
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if( !IsCoded( rStm, nVersion ) )
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return;
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rStm.SeekRel( 14 );
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// decompress
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if( 1 == nVersion )
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{
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SAL_WARN("svx", "staroffice binary file formats are no longer supported inside the gallery!");
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}
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else if( 2 == nVersion )
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{
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ZCodec aCodec;
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aCodec.BeginCompression();
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aCodec.Decompress( rStm, rStmToRead );
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aCodec.EndCompression();
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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