91 lines
2.0 KiB
C++
91 lines
2.0 KiB
C++
// Rar1Decoder.h
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// According to unRAR license, this code may not be used to develop
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// a program that creates RAR archives
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#ifndef __COMPRESS_RAR1_DECODER_H
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#define __COMPRESS_RAR1_DECODER_H
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#include "../../Common/MyCom.h"
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#include "../ICoder.h"
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#include "../Common/InBuffer.h"
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#include "BitmDecoder.h"
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#include "HuffmanDecoder.h"
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#include "LzOutWindow.h"
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namespace NCompress {
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namespace NRar1 {
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const UInt32 kNumRepDists = 4;
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typedef NBitm::CDecoder<CInBuffer> CBitDecoder;
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class CDecoder :
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public ICompressCoder,
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public ICompressSetDecoderProperties2,
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public CMyUnknownImp
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{
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public:
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CLzOutWindow m_OutWindowStream;
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CBitDecoder m_InBitStream;
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UInt32 m_RepDists[kNumRepDists];
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UInt32 m_RepDistPtr;
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UInt32 LastDist;
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UInt32 LastLength;
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Int64 m_UnpackSize;
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bool m_IsSolid;
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UInt32 ReadBits(int numBits);
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HRESULT CopyBlock(UInt32 distance, UInt32 len);
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UInt32 DecodeNum(const UInt32 *posTab);
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HRESULT ShortLZ();
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HRESULT LongLZ();
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HRESULT HuffDecode();
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void GetFlagsBuf();
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void InitData();
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void InitHuff();
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void CorrHuff(UInt32 *CharSet, UInt32 *NumToPlace);
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void OldUnpWriteBuf();
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UInt32 ChSet[256],ChSetA[256],ChSetB[256],ChSetC[256];
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UInt32 Place[256],PlaceA[256],PlaceB[256],PlaceC[256];
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UInt32 NToPl[256],NToPlB[256],NToPlC[256];
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UInt32 FlagBuf,AvrPlc,AvrPlcB,AvrLn1,AvrLn2,AvrLn3;
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int Buf60,NumHuf,StMode,LCount,FlagsCnt;
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UInt32 Nhfb,Nlzb,MaxDist3;
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void InitStructures();
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HRESULT CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream,
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const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
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public:
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CDecoder();
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MY_UNKNOWN_IMP1(ICompressSetDecoderProperties2)
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/*
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void ReleaseStreams()
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{
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m_OutWindowStream.ReleaseStream();
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m_InBitStream.ReleaseStream();
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}
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*/
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STDMETHOD(Code)(ISequentialInStream *inStream, ISequentialOutStream *outStream,
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const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
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STDMETHOD(SetDecoderProperties2)(const Byte *data, UInt32 size);
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};
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}}
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#endif
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