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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 .
*/
#ifndef INCLUDED_TOOLS_ZCODEC_HXX
#define INCLUDED_TOOLS_ZCODEC_HXX
#include <tools/toolsdllapi.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 )
class SvStream;
class TOOLS_DLLPUBLIC ZCodec
{
private:
sal_uIntPtr mbInit;
bool mbStatus;
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( bool nIOFlag );
void ImplWriteBack();
public:
ZCodec( sal_uIntPtr nInBuf, sal_uIntPtr nOutBuf, sal_uIntPtr nMemUsage = MAX_MEM_USAGE );
ZCodec();
virtual ~ZCodec();
virtual void BeginCompression( sal_uIntPtr 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 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 SetCRC( sal_uIntPtr nCurrentCRC );
sal_uIntPtr UpdateCRC( sal_uIntPtr nLatestCRC, sal_uInt8* pSource, long nDatSize );
sal_uIntPtr GetCRC();
};
class GZCodec : public ZCodec
{
public:
GZCodec(){};
virtual ~GZCodec(){};
virtual void BeginCompression( sal_uIntPtr nCompressMethod = ZCODEC_DEFAULT ) SAL_OVERRIDE
{
ZCodec::BeginCompression( nCompressMethod | ZCODEC_GZ_LIB );
};
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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