lotuswordpro/source/filter/explode.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*************************************************************************
   3  *
   4  *  The Contents of this file are made available subject to the terms of
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   7  *         - GNU Lesser General Public License Version 2.1
   8  *         - Sun Industry Standards Source License Version 1.1
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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
  19  *  License version 2.1, as published by the Free Software Foundation.
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  22  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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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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  43  *  See the License for the specific provisions governing your rights and
  44  *  obligations concerning the Software.
  45  *
  46  *  The Initial Developer of the Original Code is: IBM Corporation
  47  *
  48  *  Copyright: 2008 by IBM Corporation
  49  *
  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 <sal/types.h>
  60
  61 class SvStream;
  62
  63 class HuffmanTreeNode
  64 {
  65 public:
  66     HuffmanTreeNode * left;
  67     HuffmanTreeNode * right;
  68     sal_uInt32 value;
  69
  70     HuffmanTreeNode(sal_uInt32 value = 0xffffffff, HuffmanTreeNode * left = nullptr, HuffmanTreeNode * right = nullptr) ;
  71     ~HuffmanTreeNode() ;
  72     HuffmanTreeNode * InsertNode(sal_uInt32 nValue, const sal_Char * pInCode);
  73     HuffmanTreeNode * QueryNode(const sal_Char *pCode);
  74     sal_uInt32 QueryValue(const sal_Char *pCode);
  75 };
  76
  77 /**
  78  * @brief
  79  * define the function type for input read, output write
  80  */
  81 #define CHUNK 16384
  82 #define MAXWIN 4096     /* maximum window size */
  83 class Decompression
  84 {
  85 public:
  86     Decompression(SvStream * pInStream, SvStream * pOutStream);
  87     ~Decompression()
  88     {
  89         delete m_Tree1;
  90         delete m_Tree2;
  91     };
  92     /**
  93      * @brief
  94      * decompress from instream to outstream
  95      */
  96     sal_Int32 explode();
  97     sal_uInt32 ReadBits(sal_uInt16 iCount, sal_uInt32 & nBits) ;
  98     sal_uInt32 Decode(HuffmanTreeNode * pRoot);
  99
 100     /**
 101      * @brief
 102      * compressed/decompressed stream
 103      */
 104     SvStream *m_pInStream;
 105     SvStream *m_pOutStream;
 106
 107     sal_uInt32 m_nCurrent4Byte;   // bit buffer
 108     sal_uInt32 m_nBitsLeft;     // number of bits remained in bit buffer
 109
 110     sal_uInt8 m_Buffer[CHUNK];  // input byte buffer
 111     sal_uInt8 *m_pBuffer;           // pointer to input buffer
 112     sal_uInt32 m_nBytesLeft;        // number of bytes remained in byte buffer
 113
 114     sal_uInt8 m_Output[MAXWIN]; // output byte buffer
 115     sal_uInt32 m_nOutputBufferPos;  // pointer to output buffer
 116
 117     sal_uInt32 m_iArrayOfM[16];
 118
 119     HuffmanTreeNode *m_Tree1, *m_Tree2;
 120
 121     void ConstructTree1();
 122     void ConstructTree2();
 123     void fillArray();
 124     static void ToString(sal_uInt32 nBits, sal_Char *pChar, sal_uInt32 nLen);
 125 };
 126 #endif
 127
 128 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */