repo sync | baa3858 | 2013-07-26 17:53:31 -0700 | [diff] [blame^] | 1 | /* LzFind.h -- Match finder for LZ algorithms
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| 2 | 2009-04-22 : Igor Pavlov : Public domain */
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| 3 |
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| 4 | #ifndef __LZ_FIND_H
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| 5 | #define __LZ_FIND_H
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| 6 |
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| 7 | #include "Types.h"
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| 8 |
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| 9 | #ifdef __cplusplus
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| 10 | extern "C" {
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| 11 | #endif
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| 12 |
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| 13 | typedef UInt32 CLzRef;
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| 14 |
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| 15 | typedef struct _CMatchFinder
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| 16 | {
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| 17 | Byte *buffer;
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| 18 | UInt32 pos;
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| 19 | UInt32 posLimit;
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| 20 | UInt32 streamPos;
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| 21 | UInt32 lenLimit;
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| 22 |
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| 23 | UInt32 cyclicBufferPos;
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| 24 | UInt32 cyclicBufferSize; /* it must be = (historySize + 1) */
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| 25 |
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| 26 | UInt32 matchMaxLen;
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| 27 | CLzRef *hash;
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| 28 | CLzRef *son;
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| 29 | UInt32 hashMask;
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| 30 | UInt32 cutValue;
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| 31 |
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| 32 | Byte *bufferBase;
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| 33 | ISeqInStream *stream;
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| 34 | int streamEndWasReached;
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| 35 |
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| 36 | UInt32 blockSize;
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| 37 | UInt32 keepSizeBefore;
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| 38 | UInt32 keepSizeAfter;
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| 39 |
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| 40 | UInt32 numHashBytes;
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| 41 | int directInput;
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| 42 | size_t directInputRem;
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| 43 | int btMode;
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| 44 | int bigHash;
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| 45 | UInt32 historySize;
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| 46 | UInt32 fixedHashSize;
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| 47 | UInt32 hashSizeSum;
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| 48 | UInt32 numSons;
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| 49 | SRes result;
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| 50 | UInt32 crc[256];
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| 51 | } CMatchFinder;
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| 52 |
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| 53 | #define Inline_MatchFinder_GetPointerToCurrentPos(p) ((p)->buffer)
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| 54 | #define Inline_MatchFinder_GetIndexByte(p, index) ((p)->buffer[(Int32)(index)])
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| 55 |
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| 56 | #define Inline_MatchFinder_GetNumAvailableBytes(p) ((p)->streamPos - (p)->pos)
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| 57 |
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| 58 | int MatchFinder_NeedMove(CMatchFinder *p);
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| 59 | Byte *MatchFinder_GetPointerToCurrentPos(CMatchFinder *p);
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| 60 | void MatchFinder_MoveBlock(CMatchFinder *p);
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| 61 | void MatchFinder_ReadIfRequired(CMatchFinder *p);
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| 62 |
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| 63 | void MatchFinder_Construct(CMatchFinder *p);
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| 64 |
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| 65 | /* Conditions:
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| 66 | historySize <= 3 GB
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| 67 | keepAddBufferBefore + matchMaxLen + keepAddBufferAfter < 511MB
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| 68 | */
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| 69 | int MatchFinder_Create(CMatchFinder *p, UInt32 historySize,
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| 70 | UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter,
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| 71 | ISzAlloc *alloc);
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| 72 | void MatchFinder_Free(CMatchFinder *p, ISzAlloc *alloc);
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| 73 | void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, UInt32 numItems);
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| 74 | void MatchFinder_ReduceOffsets(CMatchFinder *p, UInt32 subValue);
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| 75 |
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| 76 | UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *buffer, CLzRef *son,
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| 77 | UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 _cutValue,
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| 78 | UInt32 *distances, UInt32 maxLen);
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| 79 |
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| 80 | /*
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| 81 | Conditions:
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| 82 | Mf_GetNumAvailableBytes_Func must be called before each Mf_GetMatchLen_Func.
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| 83 | Mf_GetPointerToCurrentPos_Func's result must be used only before any other function
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| 84 | */
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| 85 |
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| 86 | typedef void (*Mf_Init_Func)(void *object);
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| 87 | typedef Byte (*Mf_GetIndexByte_Func)(void *object, Int32 index);
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| 88 | typedef UInt32 (*Mf_GetNumAvailableBytes_Func)(void *object);
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| 89 | typedef const Byte * (*Mf_GetPointerToCurrentPos_Func)(void *object);
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| 90 | typedef UInt32 (*Mf_GetMatches_Func)(void *object, UInt32 *distances);
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| 91 | typedef void (*Mf_Skip_Func)(void *object, UInt32);
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| 92 |
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| 93 | typedef struct _IMatchFinder
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| 94 | {
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| 95 | Mf_Init_Func Init;
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| 96 | Mf_GetIndexByte_Func GetIndexByte;
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| 97 | Mf_GetNumAvailableBytes_Func GetNumAvailableBytes;
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| 98 | Mf_GetPointerToCurrentPos_Func GetPointerToCurrentPos;
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| 99 | Mf_GetMatches_Func GetMatches;
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| 100 | Mf_Skip_Func Skip;
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| 101 | } IMatchFinder;
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| 102 |
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| 103 | void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder *vTable);
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| 104 |
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| 105 | void MatchFinder_Init(CMatchFinder *p);
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| 106 | UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances);
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| 107 | UInt32 Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances);
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| 108 | void Bt3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num);
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| 109 | void Hc3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num);
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| 110 |
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| 111 | #ifdef __cplusplus
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| 112 | }
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| 113 | #endif
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| 114 |
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| 115 | #endif
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