chore: initial commit (extracted from Launchers monorepo)

Plugin: ns7zip v2.0.0 Architectures: x86-ansi, x86-unicode, amd64-unicode License: LGPL-2.1-or-later
2026-04-29 14:07:51 +02:00
commit d074cc7c07
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+// Rar2Decoder.h
+// According to unRAR license, this code may not be used to develop
+// a program that creates RAR archives
+
+#ifndef ZIP7_INC_COMPRESS_RAR2_DECODER_H
+#define ZIP7_INC_COMPRESS_RAR2_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 NRar2 {
+
+const unsigned kNumReps = 4;
+const unsigned kDistTableSize = 48;
+const unsigned kNumLen2Symbols = 8;
+const unsigned kLenTableSize = 28;
+const unsigned kMainTableSize = 256 + 2 + kNumReps + kNumLen2Symbols + kLenTableSize;
+const unsigned kHeapTablesSizesSum = kMainTableSize + kDistTableSize + kLenTableSize;
+const unsigned k_MM_TableSize = 256 + 1;
+const unsigned k_MM_NumChanelsMax = 4;
+const unsigned k_MM_TablesSizesSum = k_MM_TableSize * k_MM_NumChanelsMax;
+const unsigned kMaxTableSize = k_MM_TablesSizesSum;
+
+namespace NMultimedia {
+
+struct CFilter
+{
+  int K1,K2,K3,K4,K5;
+  int D1,D2,D3,D4;
+  int LastDelta;
+  UInt32 Dif[11];
+  UInt32 ByteCount;
+  int LastChar;
+
+  void Init() { memset(this, 0, sizeof(*this)); }
+  Byte Decode(int &channelDelta, Byte delta);
+};
+
+struct CFilter2
+{
+  CFilter  m_Filters[k_MM_NumChanelsMax];
+  int m_ChannelDelta;
+  unsigned CurrentChannel;
+
+  void Init() { memset(this, 0, sizeof(*this)); }
+  Byte Decode(Byte delta)
+  {
+    return m_Filters[CurrentChannel].Decode(m_ChannelDelta, delta);
+  }
+};
+
+}
+
+typedef NBitm::CDecoder<CInBuffer> CBitDecoder;
+
+const unsigned kNumHufBits = 15;
+
+Z7_CLASS_IMP_NOQIB_2(
+  CDecoder
+  , ICompressCoder
+  , ICompressSetDecoderProperties2
+)
+  bool _isSolid;
+  bool _solidAllowed;
+  bool m_TablesOK;
+  bool m_AudioMode;
+
+  CLzOutWindow m_OutWindowStream;
+  CBitDecoder m_InBitStream;
+
+  UInt32 m_RepDistPtr;
+  UInt32 m_RepDists[kNumReps];
+  UInt32 m_LastLength;
+  unsigned m_NumChannels;
+
+  NHuffman::CDecoder<kNumHufBits, kMainTableSize, 9> m_MainDecoder;
+  NHuffman::CDecoder256<kNumHufBits, kDistTableSize, 7> m_DistDecoder;
+  NHuffman::CDecoder256<kNumHufBits, kLenTableSize, 7> m_LenDecoder;
+  NHuffman::CDecoder<kNumHufBits, k_MM_TableSize, 9> m_MMDecoders[k_MM_NumChanelsMax];
+
+  UInt64 m_PackSize;
+  
+  NMultimedia::CFilter2 m_MmFilter;
+  Byte m_LastLevels[kMaxTableSize];
+
+  void InitStructures();
+  UInt32 ReadBits(unsigned numBits);
+  bool ReadTables();
+  bool ReadLastTables();
+
+  bool DecodeMm(UInt32 pos);
+  bool DecodeLz(Int32 pos);
+
+  HRESULT CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream,
+      const UInt64 *inSize, const UInt64 *outSize, ICompressProgressInfo *progress);
+
+public:
+  CDecoder();
+};
+
+}}
+
+#endif