lotuswordpro/source/filter/explode.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*************************************************************************
   3  *
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  10  *  Sun Microsystems Inc., October, 2000
  11  *
  12  *  GNU Lesser General Public License Version 2.1
  13  *  =============================================
  14  *  Copyright 2000 by Sun Microsystems, Inc.
  15  *  901 San Antonio Road, Palo Alto, CA 94303, USA
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  17  *  This library is free software; you can redistribute it and/or
  18  *  modify it under the terms of the GNU Lesser General Public
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  31  *
  32  *  Sun Industry Standards Source License Version 1.1
  33  *  =================================================
  34  *  The contents of this file are subject to the Sun Industry Standards
  35  *  Source License Version 1.1 (the "License"); You may not use this file
  36  *  except in compliance with the License. You may obtain a copy of the
  37  *  License at http://www.openoffice.org/license.html.
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  46  *  The Initial Developer of the Original Code is: IBM Corporation
  47  *
  48  *  Copyright: 2008 by IBM Corporation
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  50  *  All Rights Reserved.
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  52  *  Contributor(s): _______________________________________
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  55  ************************************************************************/
  56 #ifndef INCLUDED_LOTUSWORDPRO_SOURCE_FILTER_EXPLODE_HXX
  57 #define INCLUDED_LOTUSWORDPRO_SOURCE_FILTER_EXPLODE_HXX
  58
  59 #include <tools/stream.hxx>
  60
  61 class HuffmanTreeNode
  62 {
  63 public:
  64     HuffmanTreeNode * left;
  65     HuffmanTreeNode * right;
  66     sal_uInt32 value;
  67
  68     HuffmanTreeNode(sal_uInt32 value = 0xffffffff, HuffmanTreeNode * left = NULL, HuffmanTreeNode * right = NULL) ;
  69     ~HuffmanTreeNode() ;
  70     HuffmanTreeNode * InsertNode(sal_uInt32 nValue, const sal_Char * pInCode);
  71     HuffmanTreeNode * QueryNode(const sal_Char *pCode);
  72     sal_uInt32 QueryValue(const sal_Char *pCode);
  73 };
  74
  75 /**
  76  * @brief
  77  * define the function type for input read, output write
  78  */
  79 #define CHUNK 16384
  80 #define MAXWIN 4096     /* maximum window size */
  81 class Decompression
  82 {
  83 public:
  84     Decompression(SvStream * pInStream, SvStream * pOutStream);
  85     ~Decompression()
  86     {
  87         delete m_Tree1;
  88         delete m_Tree2;
  89     };
  90     /**
  91      * @brief
  92      * decompress from instream to outstream
  93      */
  94     sal_Int32 explode();
  95     sal_uInt32 ReadBits(sal_uInt16 iCount, sal_uInt32 & nBits) ;
  96     sal_uInt32 Decode(HuffmanTreeNode * pRoot);
  97
  98     /**
  99      * @brief
 100      * compressed/decompressed stream
 101      */
 102     SvStream *m_pInStream;
 103     SvStream *m_pOutStream;
 104
 105     sal_uInt32 m_nCurrent4Byte;   // bit buffer
 106     sal_uInt32 m_nBitsLeft;     // number of bits remained in bit buffer
 107
 108     sal_uInt8 m_Buffer[CHUNK];  // input byte buffer
 109     sal_uInt8 *m_pBuffer;           // pointer to input buffer
 110     sal_uInt32 m_nBytesLeft;        // number of bytes remained in byte buffer
 111
 112     sal_uInt8 m_Output[MAXWIN]; // output byte buffer
 113     sal_uInt32 m_nOutputBufferPos;  // pointer to output buffer
 114
 115     sal_uInt32 m_iArrayOfM[16];
 116
 117     HuffmanTreeNode *m_Tree1, *m_Tree2;
 118
 119     void ConstructTree1();
 120     void ConstructTree2();
 121     void fillArray();
 122     static void ToString(sal_uInt32 nBits, sal_Char *pChar, sal_uInt32 nLen);
 123 };
 124 #endif
 125
 126 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */