… | |
… | |
111 | u8 *op = (u8 *)out_data; |
111 | u8 *op = (u8 *)out_data; |
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 | /* off requires a type wide enough to hold a general pointer difference. |
|
|
117 | * ISO C doesn't have that (size_t might not be enough and ptrdiff_t only |
|
|
118 | * works for differences within a single object). We also assume that no |
|
|
119 | * no bit pattern traps. Since the only platform that is both non-POSIX |
|
|
120 | * and fails to support both assumptions is windows 64 bit, we make a |
|
|
121 | * special workaround for it. |
|
|
122 | */ |
|
|
123 | #if defined (WIN32) && defined (_M_X64) |
|
|
124 | unsigned _int64 off; /* workaround for missing POSIX compliance */ |
|
|
125 | #else |
|
|
126 | unsigned long off; |
|
|
127 | #endif |
116 | unsigned int hval; |
128 | unsigned int hval; |
117 | unsigned long off; |
|
|
118 | int lit; |
129 | int lit; |
119 | |
130 | |
120 | if (!in_len || !out_len) |
131 | if (!in_len || !out_len) |
121 | return 0; |
132 | return 0; |
122 | |
133 | |
… | |
… | |
157 | /* match found at *ref++ */ |
168 | /* match found at *ref++ */ |
158 | unsigned int len = 2; |
169 | unsigned int len = 2; |
159 | unsigned int maxlen = in_end - ip - len; |
170 | unsigned int maxlen = in_end - ip - len; |
160 | maxlen = maxlen > MAX_REF ? MAX_REF : maxlen; |
171 | maxlen = maxlen > MAX_REF ? MAX_REF : maxlen; |
161 | |
172 | |
162 | if (maxlen > 8) maxlen = 8;//D |
|
|
163 | |
|
|
164 | op [- lit - 1] = lit - 1; /* stop run */ |
173 | op [- lit - 1] = lit - 1; /* stop run */ |
165 | op -= !lit; /* undo run if length is zero */ |
174 | op -= !lit; /* undo run if length is zero */ |
166 | |
175 | |
167 | if (expect_false (op + 3 + 1 >= out_end)) |
176 | if (expect_false (op + 3 + 1 >= out_end)) |
168 | return 0; |
177 | return 0; |
… | |
… | |
256 | lit = 0; op++; /* start run */ |
265 | lit = 0; op++; /* start run */ |
257 | } |
266 | } |
258 | } |
267 | } |
259 | } |
268 | } |
260 | |
269 | |
261 | if (op + 2 > out_end) /* at most 2 bytes can be missing here */ |
270 | if (op + 3 > out_end) /* at most 3 bytes can be missing here */ |
262 | return 0; |
271 | return 0; |
263 | |
272 | |
264 | while (ip < in_end) |
273 | while (ip < in_end) |
265 | { |
274 | { |
266 | lit++; *op++ = *ip++; |
275 | lit++; *op++ = *ip++; |