3.13

7zip/Archive/Cab/MSZipDecoder.h

@@ -0,0 +1,88 @@
+// Archive/Cab/MSZipDecoder.h
+
+#pragma once
+
+#ifndef __ARCHIVE_CAB_DECODER_H
+#define __ARCHIVE_CAB_DECODER_H
+
+#include "Common/MyCom.h"
+#include "../../ICoder.h"
+#include "../../Common/LSBFDecoder.h"
+#include "../../Compress/Huffman/HuffmanDecoder.h"
+#include "../../Compress/LZ/LZOutWindow.h"
+
+#include "CabInBuffer.h"
+#include "MSZipExtConst.h"
+
+namespace NArchive {
+namespace NCab {
+namespace NMSZip {
+
+class CDecoderException
+{
+public:
+  enum ECauseType
+  {
+    kData
+  } m_Cause;
+  CDecoderException(ECauseType aCause): m_Cause(aCause) {}
+};
+
+class CMSZipBitDecoder: public NStream::NLSBF::CDecoder<NCab::CInBuffer>
+{
+public:
+  void InitMain(ISequentialInStream *aStream, BYTE aReservedSize, UINT32 aNumBlocks)
+  {
+    m_Stream.Init(aStream, aReservedSize, aNumBlocks);
+    Init();
+  }
+  HRESULT ReadBlock(UINT32 &anUncompressedSize, bool &aDataAreCorrect)
+  {
+    return m_Stream.ReadBlock(anUncompressedSize, aDataAreCorrect);
+  }
+};
+
+typedef NCompress::NHuffman::CDecoder<kNumHuffmanBits> CHuffmanDecoder;
+
+class CDecoder :
+  public ICompressCoder,
+  public CMyUnknownImp
+{
+  CLZOutWindow m_OutWindowStream;
+  CMSZipBitDecoder m_InBitStream;
+  CHuffmanDecoder m_MainDecoder;
+  CHuffmanDecoder m_DistDecoder;
+  CHuffmanDecoder m_LevelDecoder; // table for decoding other tables;
+
+  bool m_FinalBlock;
+  bool m_StoredMode;
+  UINT32 m_StoredBlockSize;
+
+  BYTE m_ReservedSize;
+  UINT32 m_NumInDataBlocks;
+
+  void DeCodeLevelTable(BYTE *newLevels, int numLevels);
+  void ReadTables();
+public:
+  CDecoder();
+
+  MY_UNKNOWN_IMP
+
+  HRESULT Flush();
+  // void ReleaseStreams();
+
+  STDMETHOD(Code)(ISequentialInStream *inStream,
+      ISequentialOutStream *outStream, const UINT64 *inSize, const UINT64 *outSize,
+      ICompressProgressInfo *progress);
+
+  void SetParams(BYTE aReservedSize, UINT32 aNumInDataBlocks) 
+  { 
+    m_ReservedSize = aReservedSize;
+    m_NumInDataBlocks = aNumInDataBlocks;
+  }
+
+};
+
+}}}
+
+#endif