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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* 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:
ULONG mbInit;
BOOL mbStatus;
BOOL mbFinish;
ULONG mnMemUsage;
SvStream* mpIStm;
BYTE* mpInBuf;
ULONG mnInBufSize;
ULONG mnInToRead;
SvStream* mpOStm;
BYTE* mpOutBuf;
ULONG mnOutBufSize;
ULONG mnCRC;
ULONG mnCompressMethod;
void* mpsC_Stream;
void ImplInitBuf( BOOL nIOFlag );
void ImplWriteBack( void );
public:
ZCodec( ULONG nInBuf, ULONG nOutBuf, ULONG nMemUsage = MAX_MEM_USAGE );
ZCodec( void );
virtual ~ZCodec();
virtual void BeginCompression( ULONG nCompressMethod = ZCODEC_DEFAULT );
virtual long EndCompression();
BOOL IsFinished () const { return mbFinish; }
long Compress( SvStream& rIStm, SvStream& rOStm );
long Decompress( SvStream& rIStm, SvStream& rOStm );
long Write( SvStream& rOStm, const BYTE* pData, ULONG nSize );
long Read( SvStream& rIStm, BYTE* pData, ULONG nSize );
long ReadAsynchron( SvStream& rIStm, BYTE* pData, ULONG nSize );
void SetBreak( ULONG );
ULONG GetBreak( void );
void SetCRC( ULONG nCurrentCRC );
ULONG UpdateCRC( ULONG nLatestCRC, ULONG nSource );
ULONG UpdateCRC( ULONG nLatestCRC, BYTE* pSource, long nDatSize );
ULONG GetCRC();
};
class GZCodec : public ZCodec
{
public:
GZCodec(){};
~GZCodec(){};
virtual void BeginCompression( ULONG nCompressMethod = ZCODEC_DEFAULT );
};
#endif // _ZCODEC_HXX
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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