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Diffstat (limited to 'include/tools/zcodec.hxx')
| -rw-r--r-- | include/tools/zcodec.hxx | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/include/tools/zcodec.hxx b/include/tools/zcodec.hxx new file mode 100644 index 000000000000..185cb1d9ecb0 --- /dev/null +++ b/include/tools/zcodec.hxx @@ -0,0 +1,110 @@ +/* -*- 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 _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 ) + +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_uInt8* pSource, long nDatSize ); + sal_uIntPtr GetCRC(); +}; + +class GZCodec : public ZCodec +{ +public: + GZCodec(){}; + ~GZCodec(){}; + virtual void BeginCompression( sal_uIntPtr nCompressMethod = ZCODEC_DEFAULT ); +}; + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |