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