lotuswordpro/source/filter/explode.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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   3  *
   4  *  The Contents of this file are made available subject to the terms of
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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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  43  *  See the License for the specific provisions governing your rights and
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  45  *
  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 <sal/types.h>
  60 #include <memory>
  61
  62 class SvStream;
  63
  64 class HuffmanTreeNode
  65 {
  66     std::unique_ptr<HuffmanTreeNode> left;
  67     std::unique_ptr<HuffmanTreeNode> right;
  68     sal_uInt32 value;
  69
  70 public:
  71     explicit HuffmanTreeNode(sal_uInt32 value = 0xffffffff);
  72     ~HuffmanTreeNode();
  73     HuffmanTreeNode* InsertNode(sal_uInt32 nValue, const char* pInCode);
  74     HuffmanTreeNode* QueryNode(const char* pCode);
  75     sal_uInt32 QueryValue(const char* pCode);
  76 };
  77
  78 /**
  79  * @brief
  80  * define the function type for input read, output write
  81  */
  82 #define CHUNK 16384
  83 #define MAXWIN 4096 /* maximum window size */
  84 class Decompression
  85 {
  86 public:
  87     Decompression(SvStream* pInStream, SvStream* pOutStream);
  88     /**
  89      * @brief
  90      * decompress from instream to outstream
  91      */
  92     sal_Int32 explode();
  93     sal_uInt32 ReadBits(sal_uInt16 iCount, sal_uInt32& nBits);
  94     sal_uInt32 Decode(HuffmanTreeNode* pRoot);
  95
  96 private:
  97     /**
  98      * @brief
  99      * compressed/decompressed stream
 100      */
 101     SvStream* m_pInStream;
 102     SvStream* m_pOutStream;
 103
 104     sal_uInt32 m_nCurrent4Byte; // bit buffer
 105     sal_uInt32 m_nBitsLeft; // number of bits remained in bit buffer
 106
 107     sal_uInt8 m_Buffer[CHUNK]; // input byte buffer
 108     sal_uInt8* m_pBuffer; // pointer to input buffer
 109     sal_uInt32 m_nBytesLeft; // number of bytes remained in byte buffer
 110
 111     sal_uInt8 m_Output[MAXWIN]; // output byte buffer
 112     sal_uInt32 m_nOutputBufferPos; // pointer to output buffer
 113
 114     sal_uInt32 m_iArrayOfM[16];
 115
 116     std::unique_ptr<HuffmanTreeNode> m_Tree1, m_Tree2;
 117
 118     void ConstructTree1();
 119     void ConstructTree2();
 120     void fillArray();
 121     static void ToString(sal_uInt32 nBits, char* pChar, sal_uInt32 nLen);
 122 };
 123 #endif
 124
 125 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */