108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/* LzFind.h -- Match finder for LZ algorithms
|
|
2008-10-04 : Igor Pavlov : Public domain */
|
|
|
|
#ifndef __LZFIND_H
|
|
#define __LZFIND_H
|
|
|
|
#include "types.h"
|
|
|
|
typedef LZ_UInt32 CLzRef;
|
|
|
|
typedef struct _CMatchFinder
|
|
{
|
|
Byte *buffer;
|
|
LZ_UInt32 pos;
|
|
LZ_UInt32 posLimit;
|
|
LZ_UInt32 streamPos;
|
|
LZ_UInt32 lenLimit;
|
|
|
|
LZ_UInt32 cyclicBufferPos;
|
|
LZ_UInt32 cyclicBufferSize; /* it must be = (historySize + 1) */
|
|
|
|
LZ_UInt32 matchMaxLen;
|
|
CLzRef *hash;
|
|
CLzRef *son;
|
|
LZ_UInt32 hashMask;
|
|
LZ_UInt32 cutValue;
|
|
|
|
Byte *bufferBase;
|
|
ISeqInStream *stream;
|
|
int streamEndWasReached;
|
|
|
|
LZ_UInt32 blockSize;
|
|
LZ_UInt32 keepSizeBefore;
|
|
LZ_UInt32 keepSizeAfter;
|
|
|
|
LZ_UInt32 numHashBytes;
|
|
int directInput;
|
|
int btMode;
|
|
/* int skipModeBits; */
|
|
int bigHash;
|
|
LZ_UInt32 historySize;
|
|
LZ_UInt32 fixedHashSize;
|
|
LZ_UInt32 hashSizeSum;
|
|
LZ_UInt32 numSons;
|
|
SRes result;
|
|
LZ_UInt32 crc[256];
|
|
} CMatchFinder;
|
|
|
|
#define Inline_MatchFinder_GetPointerToCurrentPos(p) ((p)->buffer)
|
|
#define Inline_MatchFinder_GetIndexByte(p, index) ((p)->buffer[(LZ_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, LZ_UInt32 historySize,
|
|
LZ_UInt32 keepAddBufferBefore, LZ_UInt32 matchMaxLen, LZ_UInt32 keepAddBufferAfter,
|
|
ISzAlloc *alloc);
|
|
void MatchFinder_Free(CMatchFinder *p, ISzAlloc *alloc);
|
|
void MatchFinder_Normalize3(LZ_UInt32 subValue, CLzRef *items, LZ_UInt32 numItems);
|
|
void MatchFinder_ReduceOffsets(CMatchFinder *p, LZ_UInt32 subValue);
|
|
|
|
LZ_UInt32 * GetMatchesSpec1(LZ_UInt32 lenLimit, LZ_UInt32 curMatch, LZ_UInt32 pos, const Byte *buffer, CLzRef *son,
|
|
LZ_UInt32 _cyclicBufferPos, LZ_UInt32 _cyclicBufferSize, LZ_UInt32 _cutValue,
|
|
LZ_UInt32 *distances, LZ_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, LZ_Int32 index);
|
|
typedef LZ_UInt32 (*Mf_GetNumAvailableBytes_Func)(void *object);
|
|
typedef const Byte * (*Mf_GetPointerToCurrentPos_Func)(void *object);
|
|
typedef LZ_UInt32 (*Mf_GetMatches_Func)(void *object, LZ_UInt32 *distances);
|
|
typedef void (*Mf_Skip_Func)(void *object, LZ_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);
|
|
LZ_UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, LZ_UInt32 *distances);
|
|
LZ_UInt32 Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, LZ_UInt32 *distances);
|
|
void Bt3Zip_MatchFinder_Skip(CMatchFinder *p, LZ_UInt32 num);
|
|
void Hc3Zip_MatchFinder_Skip(CMatchFinder *p, LZ_UInt32 num);
|
|
|
|
#endif
|