4.63

CPP/7zip/Compress/Rar1Decoder.h

@@ -0,0 +1,88 @@
+// 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