Mercurial > vba-linux

     1 // Rar1Decoder.h

     2 // According to unRAR license, this code may not be used to develop

     3 // a program that creates RAR archives

     4 

     5 #ifndef __COMPRESS_RAR1_DECODER_H

     6 #define __COMPRESS_RAR1_DECODER_H

     7 

     8 #include "../../Common/MyCom.h"

     9 

    10 #include "../ICoder.h"

    11 

    12 #include "../Common/InBuffer.h"

    13 

    14 #include "BitmDecoder.h"

    15 #include "HuffmanDecoder.h"

    16 #include "LzOutWindow.h"

    17 

    18 namespace NCompress {

    19 namespace NRar1 {

    20 

    21 const UInt32 kNumRepDists = 4;

    22 

    23 typedef NBitm::CDecoder<CInBuffer> CBitDecoder;

    24 

    25 class CDecoder :

    26   public ICompressCoder,

    27   public ICompressSetDecoderProperties2,

    28   public CMyUnknownImp

    29 {

    30 public:

    31   CLzOutWindow m_OutWindowStream;

    32   CBitDecoder m_InBitStream;

    33 

    34   UInt32 m_RepDists[kNumRepDists];

    35   UInt32 m_RepDistPtr;

    36 

    37   UInt32 LastDist;

    38   UInt32 LastLength;

    39 

    40   Int64 m_UnpackSize;

    41   bool m_IsSolid;

    42 

    43   UInt32 ReadBits(int numBits);

    44   HRESULT CopyBlock(UInt32 distance, UInt32 len);

    45 

    46   UInt32 DecodeNum(const UInt32 *posTab);

    47   HRESULT ShortLZ();

    48   HRESULT LongLZ();

    49   HRESULT HuffDecode();

    50   void GetFlagsBuf();

    51   void InitData();

    52   void InitHuff();

    53   void CorrHuff(UInt32 *CharSet, UInt32 *NumToPlace);

    54   void OldUnpWriteBuf();

    55   

    56   UInt32 ChSet[256],ChSetA[256],ChSetB[256],ChSetC[256];

    57   UInt32 Place[256],PlaceA[256],PlaceB[256],PlaceC[256];

    58   UInt32 NToPl[256],NToPlB[256],NToPlC[256];

    59   UInt32 FlagBuf,AvrPlc,AvrPlcB,AvrLn1,AvrLn2,AvrLn3;

    60   int Buf60,NumHuf,StMode,LCount,FlagsCnt;

    61   UInt32 Nhfb,Nlzb,MaxDist3;

    62 

    63   void InitStructures();

    64 

    65   HRESULT CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream,

    66       const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);

    67 

    68 public:

    69   CDecoder();

    70 

    71   MY_UNKNOWN_IMP1(ICompressSetDecoderProperties2)

    72 

    73   void ReleaseStreams()

    74   {

    75     m_OutWindowStream.ReleaseStream();

    76     m_InBitStream.ReleaseStream();

    77   }

    78 

    79   STDMETHOD(Code)(ISequentialInStream *inStream, ISequentialOutStream *outStream,

    80       const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);

    81 

    82   STDMETHOD(SetDecoderProperties2)(const Byte *data, UInt32 size);

    83 

    84 };

    85 

    86 }}

    87 

    88 #endif
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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