You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
112 lines
3.2 KiB
112 lines
3.2 KiB
![]()
4 years ago
|
/* LzFind.h -- Match finder for LZ algorithms
|
||
|
2013-01-18 : Igor Pavlov : Public domain */
|
||
|
|
||
|
#ifndef __LZ_FIND_H
|
||
|
#define __LZ_FIND_H
|
||
|
|
||
|
#include "7zTypes.h"
|
||
|
|
||
|
EXTERN_C_BEGIN
|
||
|
|
||
|
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 crc[256];
|
||
|
} 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);
|
||
|
|
||
|
EXTERN_C_END
|
||
|
|
||
|
#endif
|