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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 _LZWDECOM_HXX
#define _LZWDECOM_HXX
#include <tools/stream.hxx>
struct LZWTableEntry {
sal_uInt16 nPrevCode;
sal_uInt16 nDataCount;
sal_uInt8 nData;
};
class LZWDecompressor {
public:
LZWDecompressor();
~LZWDecompressor();
void StartDecompression(SvStream & rIStream);
sal_uLong Decompress(sal_uInt8 * pTarget, sal_uLong nMaxCount);
// Liefert die Anzahl der geschriebenen Bytes, wenn < nMaxCount,
// sind keine weiteren Daten zu entpacken, oder es ist ein
// Fehler aufgetreten.
private:
sal_uInt16 GetNextCode();
void AddToTable(sal_uInt16 nPrevCode, sal_uInt16 nCodeFirstData);
void DecompressSome();
SvStream * pIStream;
LZWTableEntry * pTable;
sal_uInt16 nTableSize;
sal_Bool bEOIFound, bInvert, bFirst;
sal_uInt16 nOldCode;
sal_uInt8 * pOutBuf;
sal_uInt8 * pOutBufData;
sal_uInt16 nOutBufDataLen;
sal_uInt8 nInputBitsBuf;
sal_uInt16 nInputBitsBufSize;
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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