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11ff2c71 | 1 | /* LzFind.h -- Match finder for LZ algorithms\r |
f0737de8 | 2 | 2017-06-10 : Igor Pavlov : Public domain */\r |
11ff2c71 | 3 | \r |
1e230224 LG |
4 | #ifndef __LZ_FIND_H\r |
5 | #define __LZ_FIND_H\r | |
11ff2c71 | 6 | \r |
1e230224 LG |
7 | #include "7zTypes.h"\r |
8 | \r | |
9 | EXTERN_C_BEGIN\r | |
11ff2c71 LG |
10 | \r |
11 | typedef UInt32 CLzRef;\r | |
12 | \r | |
1436aea4 MK |
13 | typedef struct _CMatchFinder {\r |
14 | Byte *buffer;\r | |
15 | UInt32 pos;\r | |
16 | UInt32 posLimit;\r | |
17 | UInt32 streamPos;\r | |
18 | UInt32 lenLimit;\r | |
19 | \r | |
20 | UInt32 cyclicBufferPos;\r | |
21 | UInt32 cyclicBufferSize; /* it must be = (historySize + 1) */\r | |
22 | \r | |
23 | Byte streamEndWasReached;\r | |
24 | Byte btMode;\r | |
25 | Byte bigHash;\r | |
26 | Byte directInput;\r | |
27 | \r | |
28 | UInt32 matchMaxLen;\r | |
29 | CLzRef *hash;\r | |
30 | CLzRef *son;\r | |
31 | UInt32 hashMask;\r | |
32 | UInt32 cutValue;\r | |
33 | \r | |
34 | Byte *bufferBase;\r | |
35 | ISeqInStream *stream;\r | |
36 | \r | |
37 | UInt32 blockSize;\r | |
38 | UInt32 keepSizeBefore;\r | |
39 | UInt32 keepSizeAfter;\r | |
40 | \r | |
41 | UInt32 numHashBytes;\r | |
42 | size_t directInputRem;\r | |
43 | UInt32 historySize;\r | |
44 | UInt32 fixedHashSize;\r | |
45 | UInt32 hashSizeSum;\r | |
46 | SRes result;\r | |
47 | UInt32 crc[256];\r | |
48 | size_t numRefs;\r | |
49 | \r | |
50 | UInt64 expectedDataSize;\r | |
11ff2c71 LG |
51 | } CMatchFinder;\r |
52 | \r | |
1436aea4 | 53 | #define Inline_MatchFinder_GetPointerToCurrentPos(p) ((p)->buffer)\r |
11ff2c71 | 54 | \r |
1436aea4 | 55 | #define Inline_MatchFinder_GetNumAvailableBytes(p) ((p)->streamPos - (p)->pos)\r |
11ff2c71 | 56 | \r |
1e230224 LG |
57 | #define Inline_MatchFinder_IsFinishedOK(p) \\r |
58 | ((p)->streamEndWasReached \\r | |
59 | && (p)->streamPos == (p)->pos \\r | |
60 | && (!(p)->directInput || (p)->directInputRem == 0))\r | |
ba39402f | 61 | \r |
1436aea4 MK |
62 | int\r |
63 | MatchFinder_NeedMove (\r | |
64 | CMatchFinder *p\r | |
65 | );\r | |
11ff2c71 | 66 | \r |
1436aea4 MK |
67 | Byte *\r |
68 | MatchFinder_GetPointerToCurrentPos (\r | |
69 | CMatchFinder *p\r | |
70 | );\r | |
71 | \r | |
72 | void\r | |
73 | MatchFinder_MoveBlock (\r | |
74 | CMatchFinder *p\r | |
75 | );\r | |
76 | \r | |
77 | void\r | |
78 | MatchFinder_ReadIfRequired (\r | |
79 | CMatchFinder *p\r | |
80 | );\r | |
81 | \r | |
82 | void\r | |
83 | MatchFinder_Construct (\r | |
84 | CMatchFinder *p\r | |
85 | );\r | |
11ff2c71 LG |
86 | \r |
87 | /* Conditions:\r | |
88 | historySize <= 3 GB\r | |
89 | keepAddBufferBefore + matchMaxLen + keepAddBufferAfter < 511MB\r | |
90 | */\r | |
1436aea4 MK |
91 | int\r |
92 | MatchFinder_Create (\r | |
93 | CMatchFinder *p,\r | |
94 | UInt32 historySize,\r | |
95 | UInt32 keepAddBufferBefore,\r | |
96 | UInt32 matchMaxLen,\r | |
97 | UInt32 keepAddBufferAfter,\r | |
98 | ISzAllocPtr alloc\r | |
99 | );\r | |
100 | \r | |
101 | void\r | |
102 | MatchFinder_Free (\r | |
103 | CMatchFinder *p,\r | |
104 | ISzAllocPtr alloc\r | |
105 | );\r | |
106 | \r | |
107 | void\r | |
108 | MatchFinder_Normalize3 (\r | |
109 | UInt32 subValue,\r | |
110 | CLzRef *items,\r | |
111 | size_t numItems\r | |
112 | );\r | |
113 | \r | |
114 | void\r | |
115 | MatchFinder_ReduceOffsets (\r | |
116 | CMatchFinder *p,\r | |
117 | UInt32 subValue\r | |
118 | );\r | |
119 | \r | |
120 | UInt32 *\r | |
121 | GetMatchesSpec1 (\r | |
122 | UInt32 lenLimit,\r | |
123 | UInt32 curMatch,\r | |
124 | UInt32 pos,\r | |
125 | const Byte *buffer,\r | |
126 | CLzRef *son,\r | |
127 | UInt32 _cyclicBufferPos,\r | |
128 | UInt32 _cyclicBufferSize,\r | |
129 | UInt32 _cutValue,\r | |
130 | UInt32 *distances,\r | |
131 | UInt32 maxLen\r | |
132 | );\r | |
11ff2c71 LG |
133 | \r |
134 | /*\r | |
135 | Conditions:\r | |
136 | Mf_GetNumAvailableBytes_Func must be called before each Mf_GetMatchLen_Func.\r | |
137 | Mf_GetPointerToCurrentPos_Func's result must be used only before any other function\r | |
138 | */\r | |
139 | \r | |
1436aea4 MK |
140 | typedef void (*Mf_Init_Func)(\r |
141 | void *object\r | |
142 | );\r | |
143 | typedef UInt32 (*Mf_GetNumAvailableBytes_Func)(\r | |
144 | void *object\r | |
145 | );\r | |
146 | typedef const Byte * (*Mf_GetPointerToCurrentPos_Func)(\r | |
147 | void *object\r | |
148 | );\r | |
149 | typedef UInt32 (*Mf_GetMatches_Func)(\r | |
150 | void *object,\r | |
151 | UInt32 *distances\r | |
152 | );\r | |
153 | typedef void (*Mf_Skip_Func)(\r | |
154 | void *object,\r | |
155 | UInt32\r | |
156 | );\r | |
157 | \r | |
158 | typedef struct _IMatchFinder {\r | |
159 | Mf_Init_Func Init;\r | |
160 | Mf_GetNumAvailableBytes_Func GetNumAvailableBytes;\r | |
161 | Mf_GetPointerToCurrentPos_Func GetPointerToCurrentPos;\r | |
162 | Mf_GetMatches_Func GetMatches;\r | |
163 | Mf_Skip_Func Skip;\r | |
11ff2c71 LG |
164 | } IMatchFinder;\r |
165 | \r | |
1436aea4 MK |
166 | void\r |
167 | MatchFinder_CreateVTable (\r | |
168 | CMatchFinder *p,\r | |
169 | IMatchFinder *vTable\r | |
170 | );\r | |
171 | \r | |
172 | void\r | |
173 | MatchFinder_Init_LowHash (\r | |
174 | CMatchFinder *p\r | |
175 | );\r | |
176 | \r | |
177 | void\r | |
178 | MatchFinder_Init_HighHash (\r | |
179 | CMatchFinder *p\r | |
180 | );\r | |
181 | \r | |
182 | void\r | |
183 | MatchFinder_Init_3 (\r | |
184 | CMatchFinder *p,\r | |
185 | int readData\r | |
186 | );\r | |
187 | \r | |
188 | void\r | |
189 | MatchFinder_Init (\r | |
190 | CMatchFinder *p\r | |
191 | );\r | |
192 | \r | |
193 | UInt32\r | |
194 | Bt3Zip_MatchFinder_GetMatches (\r | |
195 | CMatchFinder *p,\r | |
196 | UInt32 *distances\r | |
197 | );\r | |
198 | \r | |
199 | UInt32\r | |
200 | Hc3Zip_MatchFinder_GetMatches (\r | |
201 | CMatchFinder *p,\r | |
202 | UInt32 *distances\r | |
203 | );\r | |
204 | \r | |
205 | void\r | |
206 | Bt3Zip_MatchFinder_Skip (\r | |
207 | CMatchFinder *p,\r | |
208 | UInt32 num\r | |
209 | );\r | |
210 | \r | |
211 | void\r | |
212 | Hc3Zip_MatchFinder_Skip (\r | |
213 | CMatchFinder *p,\r | |
214 | UInt32 num\r | |
215 | );\r | |
11ff2c71 | 216 | \r |
1e230224 LG |
217 | EXTERN_C_END\r |
218 | \r | |
11ff2c71 | 219 | #endif\r |