1 files changed, 115 insertions, 0 deletions
diff --git a/LzFind.h b/LzFind.h
new file mode 100644
index 0000000..ccae302
--- /dev/null
+++ b/LzFind.h
@@ -0,0 +1,115 @@
+/* LzFind.h -- Match finder for LZ algorithms
+2009-04-22 : Igor Pavlov : Public domain */
+
+#ifndef __LZ_FIND_H
+#define __LZ_FIND_H
+
+#include "Types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef UInt32 CLzRef;
+
+typedef struct _CMatchFinder
+{
+  Byte *buffer;
+  UInt32 pos;
+  UInt32 posLimit;
+  UInt32 streamPos;
+  UInt32 lenLimit;
+
+  UInt32 cyclicBufferPos;
+  UInt32 cyclicBufferSize; /* it must be = (historySize + 1) */
+
+  UInt32 matchMaxLen;
+  CLzRef *hash;
+  CLzRef *son;
+  UInt32 hashMask;
+  UInt32 cutValue;
+
+  Byte *bufferBase;
+  ISeqInStream *stream;
+  int streamEndWasReached;
+
+  UInt32 blockSize;
+  UInt32 keepSizeBefore;
+  UInt32 keepSizeAfter;
+
+  UInt32 numHashBytes;
+  int directInput;
+  size_t directInputRem;
+  int btMode;
+  int bigHash;
+  UInt32 historySize;
+  UInt32 fixedHashSize;
+  UInt32 hashSizeSum;
+  UInt32 numSons;
+  SRes result;
+  uint32_t crc;
+} CMatchFinder;
+
+#define Inline_MatchFinder_GetPointerToCurrentPos(p) ((p)->buffer)
+#define Inline_MatchFinder_GetIndexByte(p, index) ((p)->buffer[(Int32)(index)])
+
+#define Inline_MatchFinder_GetNumAvailableBytes(p) ((p)->streamPos - (p)->pos)
+
+int MatchFinder_NeedMove(CMatchFinder *p);
+Byte *MatchFinder_GetPointerToCurrentPos(CMatchFinder *p);
+void MatchFinder_MoveBlock(CMatchFinder *p);
+void MatchFinder_ReadIfRequired(CMatchFinder *p);
+
+void MatchFinder_Construct(CMatchFinder *p);
+
+/* Conditions:
+     historySize <= 3 GB
+     keepAddBufferBefore + matchMaxLen + keepAddBufferAfter < 511MB
+*/
+int MatchFinder_Create(CMatchFinder *p, UInt32 historySize,
+    UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter,
+    ISzAlloc *alloc);
+void MatchFinder_Free(CMatchFinder *p, ISzAlloc *alloc);
+void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, UInt32 numItems);
+void MatchFinder_ReduceOffsets(CMatchFinder *p, UInt32 subValue);
+
+UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *buffer, CLzRef *son,
+    UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 _cutValue,
+    UInt32 *distances, UInt32 maxLen);
+
+/*
+Conditions:
+  Mf_GetNumAvailableBytes_Func must be called before each Mf_GetMatchLen_Func.
+  Mf_GetPointerToCurrentPos_Func's result must be used only before any other function
+*/
+
+typedef void (*Mf_Init_Func)(void *object);
+typedef Byte (*Mf_GetIndexByte_Func)(void *object, Int32 index);
+typedef UInt32 (*Mf_GetNumAvailableBytes_Func)(void *object);
+typedef const Byte * (*Mf_GetPointerToCurrentPos_Func)(void *object);
+typedef UInt32 (*Mf_GetMatches_Func)(void *object, UInt32 *distances);
+typedef void (*Mf_Skip_Func)(void *object, UInt32);
+
+typedef struct _IMatchFinder
+{
+  Mf_Init_Func Init;
+  Mf_GetIndexByte_Func GetIndexByte;
+  Mf_GetNumAvailableBytes_Func GetNumAvailableBytes;
+  Mf_GetPointerToCurrentPos_Func GetPointerToCurrentPos;
+  Mf_GetMatches_Func GetMatches;
+  Mf_Skip_Func Skip;
+} IMatchFinder;
+
+void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder *vTable);
+
+void MatchFinder_Init(CMatchFinder *p);
+UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances);
+UInt32 Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances);
+void Bt3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num);
+void Hc3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif