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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* 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.
*
************************************************************************/
#ifndef _ZCODEC_HXX
#define _ZCODEC_HXX
#include "tools/toolsdllapi.h"
#include <tools/solar.h>
// -----------
// - Defines -
// -----------
#define DEFAULT_IN_BUFSIZE (0x00008000UL)
#define DEFAULT_OUT_BUFSIZE (0x00008000UL)
#define MAX_MEM_USAGE 8
//
// memory requirement using compress:
// [ INBUFFER ] + [ OUTBUFFER ] + 128KB + 1 << (MEM_USAGE+9)
//
// memory requirement using decompress:
// [ INBUFFER ] + [ OUTBUFFER ] + 32KB
//
#define ZCODEC_NO_COMPRESSION (0x00000000UL)
#define ZCODEC_BEST_SPEED (0x00000001UL)
#define ZCODEC_DEFAULT_COMPRESSION (0x00000006UL)
#define ZCODEC_BEST_COMPRESSION (0x00000009UL)
#define ZCODEC_DEFAULT_STRATEGY (0x00000000UL)
#define ZCODEC_ZFILTERED (0x00000100UL)
#define ZCODEC_ZHUFFMAN_ONLY (0x00000200UL)
#define ZCODEC_UPDATE_CRC (0x00010000UL)
#define ZCODEC_GZ_LIB (0x00020000UL)
#define ZCODEC_PNG_DEFAULT ( ZCODEC_NO_COMPRESSION | ZCODEC_DEFAULT_STRATEGY | ZCODEC_UPDATE_CRC )
#define ZCODEC_DEFAULT ( ZCODEC_DEFAULT_COMPRESSION | ZCODEC_DEFAULT_STRATEGY )
// ----------
// - ZCodec -
// ----------
class SvStream;
class TOOLS_DLLPUBLIC ZCodec
{
private:
sal_uIntPtr mbInit;
sal_Bool mbStatus;
sal_Bool mbFinish;
sal_uIntPtr mnMemUsage;
SvStream* mpIStm;
sal_uInt8* mpInBuf;
sal_uIntPtr mnInBufSize;
sal_uIntPtr mnInToRead;
SvStream* mpOStm;
sal_uInt8* mpOutBuf;
sal_uIntPtr mnOutBufSize;
sal_uIntPtr mnCRC;
sal_uIntPtr mnCompressMethod;
void* mpsC_Stream;
void ImplInitBuf( sal_Bool nIOFlag );
void ImplWriteBack( void );
public:
ZCodec( sal_uIntPtr nInBuf, sal_uIntPtr nOutBuf, sal_uIntPtr nMemUsage = MAX_MEM_USAGE );
ZCodec( void );
virtual ~ZCodec();
virtual void BeginCompression( sal_uIntPtr nCompressMethod = ZCODEC_DEFAULT );
virtual long EndCompression();
sal_Bool IsFinished () const { return mbFinish; }
long Compress( SvStream& rIStm, SvStream& rOStm );
long Decompress( SvStream& rIStm, SvStream& rOStm );
long Write( SvStream& rOStm, const sal_uInt8* pData, sal_uIntPtr nSize );
long Read( SvStream& rIStm, sal_uInt8* pData, sal_uIntPtr nSize );
long ReadAsynchron( SvStream& rIStm, sal_uInt8* pData, sal_uIntPtr nSize );
void SetBreak( sal_uIntPtr );
sal_uIntPtr GetBreak( void );
void SetCRC( sal_uIntPtr nCurrentCRC );
sal_uIntPtr UpdateCRC( sal_uIntPtr nLatestCRC, sal_uIntPtr nSource );
sal_uIntPtr UpdateCRC( sal_uIntPtr nLatestCRC, sal_uInt8* pSource, long nDatSize );
sal_uIntPtr GetCRC();
};
class GZCodec : public ZCodec
{
public:
GZCodec(){};
~GZCodec(){};
virtual void BeginCompression( sal_uIntPtr nCompressMethod = ZCODEC_DEFAULT );
};
#endif // _ZCODEC_HXX
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