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| 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 | |
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116 | /* off requires a type wide enough to hold a general pointer difference. |
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117 | * ISO C doesn't have that (size_t might not be enough and ptrdiff_t only |
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118 | * works for differences within a single object). We also assume that no |
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119 | * no bit pattern traps. Since the only platform that is both non-POSIX |
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120 | * and fails to support both assumptions is windows 64 bit, we make a |
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121 | * special workaround for it. |
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122 | */ |
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123 | #if defined (WIN32) && defined (_M_X64) |
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124 | unsigned _int64 off; /* workaround for missing POSIX compliance */ |
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125 | #else |
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126 | unsigned long off; |
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127 | #endif |
| 116 | unsigned int hval; |
128 | unsigned int hval; |
| 117 | unsigned long off; |
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| 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 | |
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| 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 |
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| 163 | |
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| 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; |
