3.13

7zip/Archive/Cab/LZXDecoder.h

@@ -0,0 +1,98 @@
+// Archive/Cab/LZXDecoder.h
+
+#pragma once
+
+#ifndef __ARCHIVE_CAB_LZXDECODER_H
+#define __ARCHIVE_CAB_LZXDECODER_H
+
+#include "../../ICoder.h"
+
+#include "../../Compress/Huffman/HuffmanDecoder.h"
+#include "../../Compress/LZ/LZOutWindow.h"
+
+#include "LZXExtConst.h"
+#include "LZXBitDecoder.h"
+
+#include "LZXi86Converter.h"
+
+// #include "../../../Projects/CompressInterface/CompressInterface.h"
+
+namespace NArchive {
+namespace NCab {
+namespace NLZX {
+
+typedef NCompress::NHuffman::CDecoder<kNumHuffmanBits> CMSBFHuffmanDecoder;
+
+class CDecoder : 
+  public ICompressCoder,
+  public CMyUnknownImp
+{
+  CLZOutWindow m_OutWindowStream;
+  NBitStream::CDecoder m_InBitStream;
+
+  CMSBFHuffmanDecoder m_MainDecoder;
+  CMSBFHuffmanDecoder m_LenDecoder; // for matches with repeated offsets
+  CMSBFHuffmanDecoder m_AlignDecoder; // for matches with repeated offsets
+  CMSBFHuffmanDecoder m_LevelDecoder; // table for decoding other tables;
+
+  UINT32 m_RepDistances[kNumRepDistances];
+
+  BYTE m_LastByteLevels[256];
+  BYTE m_LastPosLenLevels[kNumPosSlotLenSlotSymbols];
+  BYTE m_LastLenLevels[kNumLenSymbols];
+
+  UINT32 m_DictionarySizePowerOf2;
+  UINT32 m_NumPosSlots;
+  UINT32 m_NumPosLenSlots;
+
+  // bool m_i86PreprocessingUsed;
+  // UINT32 m_i86TranslationSize;
+  
+  bool m_UncompressedBlock;
+  bool m_AlignIsUsed;
+
+  UINT32 m_UnCompressedBlockSize;
+
+  Ci86TranslationOutStream *m_i86TranslationOutStreamSpec;
+  CMyComPtr<ISequentialOutStream> m_i86TranslationOutStream;
+
+  BYTE m_ReservedSize;
+  UINT32 m_NumInDataBlocks;
+
+  void ReadTable(BYTE *lastLevels, BYTE *newLevels, UINT32 numSymbols);
+  void ReadTables();
+  void ClearPrevLeveles();
+
+public:
+  CDecoder();
+
+  MY_UNKNOWN_IMP
+
+  void ReleaseStreams();
+  STDMETHOD(Flush)();
+
+  // ICompressCoder interface
+  STDMETHOD(Code)(ISequentialInStream *inStream, 
+      ISequentialOutStream *outStream, 
+      const UINT64 *inSize, const UINT64 *outSize,
+      ICompressProgressInfo *progress);
+
+  void SetParams(BYTE reservedSize, UINT32 numInDataBlocks, 
+      UINT32 dictionarySizePowerOf2) 
+    { 
+      m_ReservedSize = reservedSize;
+      m_NumInDataBlocks = numInDataBlocks;
+      m_DictionarySizePowerOf2 = dictionarySizePowerOf2; 
+      if (dictionarySizePowerOf2 < 20)
+        m_NumPosSlots = 30 + (dictionarySizePowerOf2 - 15) * 2;
+      else if (dictionarySizePowerOf2 == 20)
+        m_NumPosSlots = 42;
+      else
+        m_NumPosSlots = 50;
+      m_NumPosLenSlots = m_NumPosSlots * kNumLenSlots;
+    }
+};
+
+}}}
+
+#endif