1 files changed, 95 insertions, 0 deletions
diff --git a/7zip/Compress/Rar20/Rar20Decoder.h b/7zip/Compress/Rar20/Rar20Decoder.h
new file mode 100755
index 00000000..071b3635
--- /dev/null
+++ b/7zip/Compress/Rar20/Rar20Decoder.h
@@ -0,0 +1,95 @@
+// Rar20Decoder.h
+// According to unRAR license,
+// this code may not be used to develop a 
+// RAR (WinRAR) compatible archiver
+
+#ifndef __RAR20_DECODER_H
+#define __RAR20_DECODER_H
+
+#include "../../../Common/MyCom.h"
+
+#include "../../ICoder.h"
+#include "../../Common/MSBFDecoder.h"
+#include "../../Common/InBuffer.h"
+
+#include "../LZ/LZOutWindow.h"
+#include "../Huffman/HuffmanDecoder.h"
+
+#include "Rar20Multimedia.h"
+#include "Rar20Const.h"
+
+namespace NCompress {
+namespace NRar20 {
+
+typedef NStream::NMSBF::CDecoder<CInBuffer> CBitDecoder;
+
+const int kNumHuffmanBits = 15;
+
+class CDecoder :
+  public ICompressCoder,
+  public ICompressSetDecoderProperties2,
+  public CMyUnknownImp
+{
+  CLZOutWindow m_OutWindowStream;
+  CBitDecoder m_InBitStream;
+  NHuffman::CDecoder<kNumHuffmanBits, kMainTableSize> m_MainDecoder;
+  NHuffman::CDecoder<kNumHuffmanBits, kDistTableSize> m_DistDecoder;
+  NHuffman::CDecoder<kNumHuffmanBits, kLenTableSize> m_LenDecoder;
+  NHuffman::CDecoder<kNumHuffmanBits, kMMTableSize> m_MMDecoders[NMultimedia::kNumChanelsMax];
+  NHuffman::CDecoder<kNumHuffmanBits, kLevelTableSize> m_LevelDecoder;
+
+  bool m_AudioMode;
+
+  NMultimedia::CPredictor m_Predictor;
+  int m_NumChannels;
+
+  UInt32 m_RepDists[kNumRepDists];
+  UInt32 m_RepDistPtr;
+
+  UInt32 m_LastLength;
+  
+  Byte m_LastLevels[kMaxTableSize];
+
+  UInt64 m_PackSize;
+  bool m_IsSolid;
+
+  void InitStructures();
+  bool ReadTables();
+  bool ReadLastTables();
+  void CopyBackBlockOp(UInt32 aDistance, UInt32 aLength)
+  {
+    /*
+    if(m_Position <= aDistance)
+      throw CDecoderException(CDecoderException::kData);
+    */
+    m_RepDists[m_RepDistPtr++ & 3] = aDistance;
+    m_LastLength = aLength;
+    m_OutWindowStream.CopyBlock(aDistance, aLength);
+  }
+
+public:
+  CDecoder();
+
+  MY_UNKNOWN_IMP1(ICompressSetDecoderProperties2)
+
+  void ReleaseStreams()
+  {
+    m_OutWindowStream.ReleaseStream();
+    m_InBitStream.ReleaseStream();
+  }
+
+  STDMETHOD(CodeReal)(ISequentialInStream *inStream,
+      ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
+      ICompressProgressInfo *progress);
+
+  STDMETHOD(Code)(ISequentialInStream *inStream,
+      ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize,
+      ICompressProgressInfo *progress);
+
+  STDMETHOD(SetDecoderProperties2)(const Byte *data, UInt32 size);
+
+};
+
+}}
+
+#endif