| … | |
… | |
| 112 | const u8 *in_end = ip + in_len; |
112 | const u8 *in_end = ip + in_len; |
| 113 | u8 *out_end = op + out_len; |
113 | u8 *out_end = op + out_len; |
| 114 | const u8 *ref; |
114 | const u8 *ref; |
| 115 | |
115 | |
| 116 | unsigned int hval; |
116 | unsigned int hval; |
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117 | #if WIN32 |
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118 | unsigned _int64 off; /* workaround for microsoft bug (they claim to support POSIX) */ |
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119 | #else |
| 117 | unsigned long off; |
120 | unsigned long off; |
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121 | #endif |
| 118 | int lit; |
122 | int lit; |
| 119 | |
123 | |
| 120 | if (!in_len || !out_len) |
124 | if (!in_len || !out_len) |
| 121 | return 0; |
125 | return 0; |
| 122 | |
126 | |
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| 136 | hval = NEXT (hval, ip); |
140 | hval = NEXT (hval, ip); |
| 137 | hslot = htab + IDX (hval); |
141 | hslot = htab + IDX (hval); |
| 138 | ref = *hslot; *hslot = ip; |
142 | ref = *hslot; *hslot = ip; |
| 139 | |
143 | |
| 140 | if (1 |
144 | if (1 |
| 141 | #if INIT_HTAB && !USE_MEMCPY |
145 | #if INIT_HTAB |
| 142 | && ref < ip /* the next test will actually take care of this, but this is faster */ |
146 | && ref < ip /* the next test will actually take care of this, but this is faster */ |
| 143 | #endif |
147 | #endif |
| 144 | && (off = ip - ref - 1) < MAX_OFF |
148 | && (off = ip - ref - 1) < MAX_OFF |
| 145 | && ip + 4 < in_end |
149 | && ip + 4 < in_end |
| 146 | && ref > (u8 *)in_data |
150 | && ref > (u8 *)in_data |
| … | |
… | |
| 254 | lit = 0; op++; /* start run */ |
258 | lit = 0; op++; /* start run */ |
| 255 | } |
259 | } |
| 256 | } |
260 | } |
| 257 | } |
261 | } |
| 258 | |
262 | |
| 259 | if (op + 2 > out_end) /* at most 2 bytes can be missing here */ |
263 | if (op + 3 > out_end) /* at most 3 bytes can be missing here */ |
| 260 | return 0; |
264 | return 0; |
| 261 | |
265 | |
| 262 | while (ip < in_end) |
266 | while (ip < in_end) |
| 263 | { |
267 | { |
| 264 | lit++; *op++ = *ip++; |
268 | lit++; *op++ = *ip++; |
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269 | |
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270 | if (expect_false (lit == MAX_LIT)) |
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271 | { |
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272 | op [- lit - 1] = lit - 1; /* stop run */ |
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273 | lit = 0; op++; /* start run */ |
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274 | } |
| 265 | } |
275 | } |
| 266 | |
276 | |
| 267 | op [- lit - 1] = lit - 1; /* end run */ |
277 | op [- lit - 1] = lit - 1; /* end run */ |
| 268 | op -= !lit; /* undo run if length is zero */ |
278 | op -= !lit; /* undo run if length is zero */ |
| 269 | |
279 | |
