97 lines
3.3 KiB
C++
97 lines
3.3 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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#ifndef INCLUDED_TOOLS_ZCODEC_HXX
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#define INCLUDED_TOOLS_ZCODEC_HXX
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#include <tools/toolsdllapi.h>
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#define ZCODEC_NO_COMPRESSION (0x00000000UL)
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#define ZCODEC_BEST_SPEED (0x00000001UL)
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#define ZCODEC_DEFAULT_COMPRESSION (0x00000006UL)
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#define ZCODEC_BEST_COMPRESSION (0x00000009UL)
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#define ZCODEC_DEFAULT_STRATEGY (0x00000000UL)
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#define ZCODEC_UPDATE_CRC (0x00010000UL)
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#define ZCODEC_GZ_LIB (0x00020000UL)
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#define ZCODEC_PNG_DEFAULT ( ZCODEC_NO_COMPRESSION | ZCODEC_DEFAULT_STRATEGY | ZCODEC_UPDATE_CRC )
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#define ZCODEC_DEFAULT ( ZCODEC_DEFAULT_COMPRESSION | ZCODEC_DEFAULT_STRATEGY )
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class SvStream;
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class TOOLS_DLLPUBLIC ZCodec
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{
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private:
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sal_uIntPtr mbInit;
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bool mbStatus;
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bool mbFinish;
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SvStream* mpIStm;
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sal_uInt8* mpInBuf;
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sal_uIntPtr mnInBufSize;
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sal_uIntPtr mnInToRead;
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SvStream* mpOStm;
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sal_uInt8* mpOutBuf;
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sal_uIntPtr mnOutBufSize;
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sal_uIntPtr mnCRC;
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sal_uIntPtr mnCompressMethod;
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void* mpsC_Stream;
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void ImplInitBuf( bool nIOFlag );
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void ImplWriteBack();
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public:
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ZCodec( sal_uIntPtr nInBuf = 0x8000UL, sal_uIntPtr nOutBuf = 0x8000UL );
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virtual ~ZCodec();
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virtual void BeginCompression( sal_uIntPtr nCompressMethod = ZCODEC_DEFAULT );
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virtual long EndCompression();
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bool IsFinished () const { return mbFinish; }
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long Compress( SvStream& rIStm, SvStream& rOStm );
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long Decompress( SvStream& rIStm, SvStream& rOStm );
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long Write( SvStream& rOStm, const sal_uInt8* pData, sal_uIntPtr nSize );
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long Read( SvStream& rIStm, sal_uInt8* pData, sal_uIntPtr nSize );
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long ReadAsynchron( SvStream& rIStm, sal_uInt8* pData, sal_uIntPtr nSize );
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void SetBreak( sal_uIntPtr );
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sal_uIntPtr GetBreak();
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void SetCRC( sal_uIntPtr nCurrentCRC );
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sal_uIntPtr UpdateCRC( sal_uIntPtr nLatestCRC, sal_uInt8* pSource, long nDatSize );
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sal_uIntPtr GetCRC();
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};
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class GZCodec : public ZCodec
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{
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public:
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GZCodec(){};
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virtual ~GZCodec(){};
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virtual void BeginCompression( sal_uIntPtr nCompressMethod = ZCODEC_DEFAULT ) SAL_OVERRIDE
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{
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ZCodec::BeginCompression( nCompressMethod | ZCODEC_GZ_LIB );
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};
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};
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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