|
rlm@1
|
1 /* LzFind.h -- Match finder for LZ algorithms
|
|
rlm@1
|
2 2008-10-04 : Igor Pavlov : Public domain */
|
|
rlm@1
|
3
|
|
rlm@1
|
4 #ifndef __LZFIND_H
|
|
rlm@1
|
5 #define __LZFIND_H
|
|
rlm@1
|
6
|
|
rlm@1
|
7 #include "Types.h"
|
|
rlm@1
|
8
|
|
rlm@1
|
9 typedef UInt32 CLzRef;
|
|
rlm@1
|
10
|
|
rlm@1
|
11 typedef struct _CMatchFinder
|
|
rlm@1
|
12 {
|
|
rlm@1
|
13 Byte *buffer;
|
|
rlm@1
|
14 UInt32 pos;
|
|
rlm@1
|
15 UInt32 posLimit;
|
|
rlm@1
|
16 UInt32 streamPos;
|
|
rlm@1
|
17 UInt32 lenLimit;
|
|
rlm@1
|
18
|
|
rlm@1
|
19 UInt32 cyclicBufferPos;
|
|
rlm@1
|
20 UInt32 cyclicBufferSize; /* it must be = (historySize + 1) */
|
|
rlm@1
|
21
|
|
rlm@1
|
22 UInt32 matchMaxLen;
|
|
rlm@1
|
23 CLzRef *hash;
|
|
rlm@1
|
24 CLzRef *son;
|
|
rlm@1
|
25 UInt32 hashMask;
|
|
rlm@1
|
26 UInt32 cutValue;
|
|
rlm@1
|
27
|
|
rlm@1
|
28 Byte *bufferBase;
|
|
rlm@1
|
29 ISeqInStream *stream;
|
|
rlm@1
|
30 int streamEndWasReached;
|
|
rlm@1
|
31
|
|
rlm@1
|
32 UInt32 blockSize;
|
|
rlm@1
|
33 UInt32 keepSizeBefore;
|
|
rlm@1
|
34 UInt32 keepSizeAfter;
|
|
rlm@1
|
35
|
|
rlm@1
|
36 UInt32 numHashBytes;
|
|
rlm@1
|
37 int directInput;
|
|
rlm@1
|
38 int btMode;
|
|
rlm@1
|
39 /* int skipModeBits; */
|
|
rlm@1
|
40 int bigHash;
|
|
rlm@1
|
41 UInt32 historySize;
|
|
rlm@1
|
42 UInt32 fixedHashSize;
|
|
rlm@1
|
43 UInt32 hashSizeSum;
|
|
rlm@1
|
44 UInt32 numSons;
|
|
rlm@1
|
45 SRes result;
|
|
rlm@1
|
46 UInt32 crc[256];
|
|
rlm@1
|
47 } CMatchFinder;
|
|
rlm@1
|
48
|
|
rlm@1
|
49 #define Inline_MatchFinder_GetPointerToCurrentPos(p) ((p)->buffer)
|
|
rlm@1
|
50 #define Inline_MatchFinder_GetIndexByte(p, index) ((p)->buffer[(Int32)(index)])
|
|
rlm@1
|
51
|
|
rlm@1
|
52 #define Inline_MatchFinder_GetNumAvailableBytes(p) ((p)->streamPos - (p)->pos)
|
|
rlm@1
|
53
|
|
rlm@1
|
54 int MatchFinder_NeedMove(CMatchFinder *p);
|
|
rlm@1
|
55 Byte *MatchFinder_GetPointerToCurrentPos(CMatchFinder *p);
|
|
rlm@1
|
56 void MatchFinder_MoveBlock(CMatchFinder *p);
|
|
rlm@1
|
57 void MatchFinder_ReadIfRequired(CMatchFinder *p);
|
|
rlm@1
|
58
|
|
rlm@1
|
59 void MatchFinder_Construct(CMatchFinder *p);
|
|
rlm@1
|
60
|
|
rlm@1
|
61 /* Conditions:
|
|
rlm@1
|
62 historySize <= 3 GB
|
|
rlm@1
|
63 keepAddBufferBefore + matchMaxLen + keepAddBufferAfter < 511MB
|
|
rlm@1
|
64 */
|
|
rlm@1
|
65 int MatchFinder_Create(CMatchFinder *p, UInt32 historySize,
|
|
rlm@1
|
66 UInt32 keepAddBufferBefore, UInt32 matchMaxLen, UInt32 keepAddBufferAfter,
|
|
rlm@1
|
67 ISzAlloc *alloc);
|
|
rlm@1
|
68 void MatchFinder_Free(CMatchFinder *p, ISzAlloc *alloc);
|
|
rlm@1
|
69 void MatchFinder_Normalize3(UInt32 subValue, CLzRef *items, UInt32 numItems);
|
|
rlm@1
|
70 void MatchFinder_ReduceOffsets(CMatchFinder *p, UInt32 subValue);
|
|
rlm@1
|
71
|
|
rlm@1
|
72 UInt32 * GetMatchesSpec1(UInt32 lenLimit, UInt32 curMatch, UInt32 pos, const Byte *buffer, CLzRef *son,
|
|
rlm@1
|
73 UInt32 _cyclicBufferPos, UInt32 _cyclicBufferSize, UInt32 _cutValue,
|
|
rlm@1
|
74 UInt32 *distances, UInt32 maxLen);
|
|
rlm@1
|
75
|
|
rlm@1
|
76 /*
|
|
rlm@1
|
77 Conditions:
|
|
rlm@1
|
78 Mf_GetNumAvailableBytes_Func must be called before each Mf_GetMatchLen_Func.
|
|
rlm@1
|
79 Mf_GetPointerToCurrentPos_Func's result must be used only before any other function
|
|
rlm@1
|
80 */
|
|
rlm@1
|
81
|
|
rlm@1
|
82 typedef void (*Mf_Init_Func)(void *object);
|
|
rlm@1
|
83 typedef Byte (*Mf_GetIndexByte_Func)(void *object, Int32 index);
|
|
rlm@1
|
84 typedef UInt32 (*Mf_GetNumAvailableBytes_Func)(void *object);
|
|
rlm@1
|
85 typedef const Byte * (*Mf_GetPointerToCurrentPos_Func)(void *object);
|
|
rlm@1
|
86 typedef UInt32 (*Mf_GetMatches_Func)(void *object, UInt32 *distances);
|
|
rlm@1
|
87 typedef void (*Mf_Skip_Func)(void *object, UInt32);
|
|
rlm@1
|
88
|
|
rlm@1
|
89 typedef struct _IMatchFinder
|
|
rlm@1
|
90 {
|
|
rlm@1
|
91 Mf_Init_Func Init;
|
|
rlm@1
|
92 Mf_GetIndexByte_Func GetIndexByte;
|
|
rlm@1
|
93 Mf_GetNumAvailableBytes_Func GetNumAvailableBytes;
|
|
rlm@1
|
94 Mf_GetPointerToCurrentPos_Func GetPointerToCurrentPos;
|
|
rlm@1
|
95 Mf_GetMatches_Func GetMatches;
|
|
rlm@1
|
96 Mf_Skip_Func Skip;
|
|
rlm@1
|
97 } IMatchFinder;
|
|
rlm@1
|
98
|
|
rlm@1
|
99 void MatchFinder_CreateVTable(CMatchFinder *p, IMatchFinder *vTable);
|
|
rlm@1
|
100
|
|
rlm@1
|
101 void MatchFinder_Init(CMatchFinder *p);
|
|
rlm@1
|
102 UInt32 Bt3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances);
|
|
rlm@1
|
103 UInt32 Hc3Zip_MatchFinder_GetMatches(CMatchFinder *p, UInt32 *distances);
|
|
rlm@1
|
104 void Bt3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num);
|
|
rlm@1
|
105 void Hc3Zip_MatchFinder_Skip(CMatchFinder *p, UInt32 num);
|
|
rlm@1
|
106
|
|
rlm@1
|
107 #endif
|
