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111 lines
3.2 KiB
111 lines
3.2 KiB
/* LzFind.h -- Match finder for LZ algorithms |
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2013-01-18 : Igor Pavlov : Public domain */ |
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#ifndef __LZ_FIND_H |
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#define __LZ_FIND_H |
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#include "7zTypes.h" |
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EXTERN_C_BEGIN |
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typedef UInt32 CLzRef; |
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typedef struct _CMatchFinder |
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{ |
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Byte *buffer; |
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UInt32 pos; |
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UInt32 posLimit; |
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UInt32 streamPos; |
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UInt32 lenLimit; |
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UInt32 cyclicBufferPos; |
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UInt32 cyclicBufferSize; /* it must be = (historySize + 1) */ |
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UInt32 matchMaxLen; |
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CLzRef *hash; |
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CLzRef *son; |
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UInt32 hashMask; |
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UInt32 cutValue; |
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Byte *bufferBase; |
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ISeqInStream *stream; |
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int streamEndWasReached; |
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UInt32 blockSize; |
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UInt32 keepSizeBefore; |
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UInt32 keepSizeAfter; |
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UInt32 numHashBytes; |
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int directInput; |
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size_t directInputRem; |
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int btMode; |
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int bigHash; |
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UInt32 historySize; |
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UInt32 fixedHashSize; |
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UInt32 hashSizeSum; |
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UInt32 numSons; |
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SRes result; |
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UInt32 crc[256]; |
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} CMatchFinder; |
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#define Inline_MatchFinder_GetPointerToCurrentPos(p) ((p)->buffer) |
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#define Inline_MatchFinder_GetIndexByte(p, index) ((p)->buffer[(Int32)(index)]) |
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#define Inline_MatchFinder_GetNumAvailableBytes(p) ((p)->streamPos - (p)->pos) |
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int MatchFinder_NeedMove(CMatchFinder *p); |
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Byte *MatchFinder_GetPointerToCurrentPos(CMatchFinder *p); |
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void MatchFinder_MoveBlock(CMatchFinder *p); |
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void MatchFinder_ReadIfRequired(CMatchFinder *p); |
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void MatchFinder_Construct(CMatchFinder *p); |
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/* Conditions: |
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historySize <= 3 GB |
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keepAddBufferBefore + matchMaxLen + keepAddBufferAfter < 511MB |
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*/ |
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int MatchFinder_Create(CMatchFinder *p, UInt32 historySize, |
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UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter, |
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ISzAlloc *alloc); |
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void MatchFinder_Free(CMatchFinder *p, ISzAlloc *alloc); |
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void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, UInt32 numItems); |
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void MatchFinder_ReduceOffsets(CMatchFinder *p, UInt32 subValue); |
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UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *buffer, CLzRef *son, |
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UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 _cutValue, |
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UInt32 *distances, UInt32 maxLen); |
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/* |
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Conditions: |
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Mf_GetNumAvailableBytes_Func must be called before each Mf_GetMatchLen_Func. |
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Mf_GetPointerToCurrentPos_Func's result must be used only before any other function |
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*/ |
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typedef void (*Mf_Init_Func)(void *object); |
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typedef Byte (*Mf_GetIndexByte_Func)(void *object, Int32 index); |
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typedef UInt32 (*Mf_GetNumAvailableBytes_Func)(void *object); |
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typedef const Byte * (*Mf_GetPointerToCurrentPos_Func)(void *object); |
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typedef UInt32 (*Mf_GetMatches_Func)(void *object, UInt32 *distances); |
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typedef void (*Mf_Skip_Func)(void *object, UInt32); |
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typedef struct _IMatchFinder |
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{ |
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Mf_Init_Func Init; |
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Mf_GetIndexByte_Func GetIndexByte; |
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Mf_GetNumAvailableBytes_Func GetNumAvailableBytes; |
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Mf_GetPointerToCurrentPos_Func GetPointerToCurrentPos; |
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Mf_GetMatches_Func GetMatches; |
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Mf_Skip_Func Skip; |
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} IMatchFinder; |
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void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder *vTable); |
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void MatchFinder_Init(CMatchFinder *p); |
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UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances); |
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UInt32 Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances); |
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void Bt3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num); |
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void Hc3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num); |
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EXTERN_C_END |
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#endif
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