3.13

7zip/Compress/LZ/BinTree/BinTree.h

@@ -0,0 +1,116 @@
+// BinTree.h
+
+// #pragma once
+
+// #ifndef __BINTREE_H
+// #define __BINTREE_H
+
+#include "../LZInWindow.h"
+// #include "Common/Types.h"
+// #include "Windows/Defs.h"
+ 
+namespace BT_NAMESPACE {
+
+// #define __USE_3_BYTES
+
+#ifdef __USE_3_BYTES
+
+#pragma pack(push, PragmaBinTree, 1)
+
+struct CIndex
+{
+  BYTE Data[3];
+  CIndex(){}
+  CIndex(UINT32 value)
+  { 
+    Data[0] = value & 0xFF;
+    Data[1] = (value >> 8) & 0xFF;
+    Data[2] = (value >> 16) & 0xFF;
+  }
+  operator UINT32() const { return (*((const UINT32 *)Data)) & 0xFFFFFF; }
+};
+const UINT32 kMaxValForNormalize = CIndex(-1);
+
+#pragma pack(pop, PragmaBinTree)
+
+#else
+
+typedef UINT32 CIndex;
+const UINT32 kMaxValForNormalize = (UINT32(1) << 31) - 1;
+
+#endif
+
+
+
+// #define HASH_ARRAY_2
+
+// #ifdef HASH_ARRAY_2
+
+// #define HASH_ARRAY_3
+
+// #else
+
+// #define HASH_ZIP
+
+// #endif
+
+#pragma pack(push, PragmaBinTreePair, 1)
+// #pragma pack(push, 1)
+
+struct CPair
+{
+  CIndex Left;
+  CIndex Right;
+};
+
+// #pragma pack(pop)
+#pragma pack(pop, PragmaBinTreePair)
+
+class CInTree: public CLZInWindow
+{
+  UINT32 _cyclicBufferPos;
+  UINT32 _cyclicBufferSize;
+  UINT32 _historySize;
+  UINT32 _matchMaxLen;
+
+  CIndex *_hash;
+  
+  #ifdef HASH_ARRAY_2
+  CIndex *_hash2;
+  #ifdef HASH_ARRAY_3
+  CIndex *_hash3;
+  #endif
+  #endif
+  
+  CPair *_son;
+
+  UINT32 _cutValue;
+
+  void NormalizeLinks(CIndex *array, UINT32 numItems, UINT32 subValue);
+  void Normalize();
+  void FreeMemory();
+
+public:
+  CInTree();
+  ~CInTree();
+  HRESULT Create(UINT32 sizeHistory, UINT32 keepAddBufferBefore, UINT32 matchMaxLen, 
+      UINT32 keepAddBufferAfter, UINT32 sizeReserv = (1<<17));
+	HRESULT Init(ISequentialInStream *stream);
+  void SetCutValue(UINT32 cutValue) { _cutValue = cutValue; }
+  UINT32 GetLongestMatch(UINT32 *distances);
+  void DummyLongestMatch();
+  HRESULT MovePos()
+  {
+    _cyclicBufferPos++;
+    if (_cyclicBufferPos >= _cyclicBufferSize)
+      _cyclicBufferPos = 0;
+    RINOK(CLZInWindow::MovePos());
+    if (_pos == kMaxValForNormalize)
+      Normalize();
+    return S_OK;
+  }
+};
+
+}
+
+// #endif