Mercurial > hg > nginx
annotate src/core/ngx_regex.c @ 3325:42c16d8bddbe
regex named captures
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 16 Nov 2009 12:19:02 +0000 |
parents | be47fe127f8c |
children | 169d84ff4064 |
rev | line source |
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 |
503 | 11 static void * ngx_libc_cdecl ngx_regex_malloc(size_t size); |
12 static void ngx_libc_cdecl ngx_regex_free(void *p); | |
195
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13 |
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14 |
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15 static ngx_pool_t *ngx_pcre_pool; |
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16 |
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17 |
503 | 18 void |
19 ngx_regex_init(void) | |
195
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20 { |
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21 pcre_malloc = ngx_regex_malloc; |
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22 pcre_free = ngx_regex_free; |
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23 } |
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24 |
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25 |
3325 | 26 static ngx_inline void |
27 ngx_regex_malloc_init(ngx_pool_t *pool) | |
195
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28 { |
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29 #if (NGX_THREADS) |
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30 ngx_core_tls_t *tls; |
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31 |
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32 if (ngx_threaded) { |
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33 tls = ngx_thread_get_tls(ngx_core_tls_key); |
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34 tls->pool = pool; |
3325 | 35 return; |
381
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36 } |
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37 |
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38 #else |
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39 |
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40 ngx_pcre_pool = pool; |
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41 |
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42 #endif |
3325 | 43 } |
381
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44 |
3325 | 45 |
46 static ngx_inline void | |
47 ngx_regex_malloc_done(void) | |
48 { | |
49 #if (NGX_THREADS) | |
50 ngx_core_tls_t *tls; | |
51 | |
52 if (ngx_threaded) { | |
53 tls = ngx_thread_get_tls(ngx_core_tls_key); | |
54 tls->pool = NULL; | |
55 return; | |
56 } | |
57 | |
58 #else | |
59 | |
60 ngx_pcre_pool = NULL; | |
61 | |
62 #endif | |
63 } | |
64 | |
65 | |
66 ngx_int_t | |
67 ngx_regex_compile(ngx_regex_compile_t *rc) | |
68 { | |
69 int n, erroff; | |
70 char *p; | |
71 const char *errstr; | |
72 ngx_regex_t *re; | |
73 | |
74 ngx_regex_malloc_init(rc->pool); | |
75 | |
76 re = pcre_compile((const char *) rc->pattern.data, (int) rc->options, | |
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77 &errstr, &erroff, NULL); |
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78 |
3325 | 79 /* ensure that there is no current pool */ |
80 ngx_regex_malloc_done(); | |
81 | |
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82 if (re == NULL) { |
3325 | 83 if ((size_t) erroff == rc->pattern.len) { |
84 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, | |
85 "pcre_compile() failed: %s in \"%V\"", | |
86 errstr, &rc->pattern) | |
87 - rc->err.data; | |
88 | |
195
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89 } else { |
3325 | 90 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, |
91 "pcre_compile() failed: %s in \"%V\" at \"%s\"", | |
92 errstr, &rc->pattern, rc->pattern.data + erroff) | |
93 - rc->err.data; | |
195
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94 } |
3325 | 95 |
96 return NGX_ERROR; | |
97 } | |
98 | |
99 rc->regex = re; | |
100 | |
101 n = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &rc->captures); | |
102 if (n < 0) { | |
103 p = "pcre_fullinfo(\"%V\", PCRE_INFO_CAPTURECOUNT) failed: %d"; | |
104 goto failed; | |
105 } | |
106 | |
107 if (rc->captures == 0) { | |
108 return NGX_OK; | |
195
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109 } |
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110 |
3325 | 111 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMECOUNT, &rc->named_captures); |
112 if (n < 0) { | |
113 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMECOUNT) failed: %d"; | |
114 goto failed; | |
115 } | |
116 | |
117 if (rc->named_captures == 0) { | |
118 return NGX_OK; | |
119 } | |
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120 |
3325 | 121 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMEENTRYSIZE, &rc->name_size); |
122 if (n < 0) { | |
123 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMEENTRYSIZE) failed: %d"; | |
124 goto failed; | |
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125 } |
3325 | 126 |
127 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMETABLE, &rc->names); | |
128 if (n < 0) { | |
129 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMETABLE) failed: %d"; | |
130 goto failed; | |
131 } | |
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132 |
3325 | 133 return NGX_OK; |
134 | |
135 failed: | |
136 | |
137 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, p, &rc->pattern, n) | |
138 - rc->err.data; | |
139 return NGX_OK; | |
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140 } |
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141 |
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142 |
503 | 143 ngx_int_t |
144 ngx_regex_capture_count(ngx_regex_t *re) | |
481 | 145 { |
146 int rc, n; | |
147 | |
148 n = 0; | |
149 | |
150 rc = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &n); | |
151 | |
501 | 152 if (rc < 0) { |
153 return (ngx_int_t) rc; | |
154 } | |
155 | |
156 return (ngx_int_t) n; | |
481 | 157 } |
158 | |
159 | |
503 | 160 ngx_int_t |
1784 | 161 ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log) |
162 { | |
163 ngx_int_t n; | |
164 ngx_uint_t i; | |
165 ngx_regex_elt_t *re; | |
166 | |
167 re = a->elts; | |
168 | |
169 for (i = 0; i < a->nelts; i++) { | |
170 | |
171 n = ngx_regex_exec(re[i].regex, s, NULL, 0); | |
172 | |
173 if (n == NGX_REGEX_NO_MATCHED) { | |
174 continue; | |
175 } | |
176 | |
177 if (n < 0) { | |
178 ngx_log_error(NGX_LOG_ALERT, log, 0, | |
3325 | 179 ngx_regex_exec_n " failed: %i on \"%V\" using \"%s\"", |
1784 | 180 n, s, re[i].name); |
181 return NGX_ERROR; | |
182 } | |
183 | |
184 /* match */ | |
185 | |
186 return NGX_OK; | |
187 } | |
188 | |
189 return NGX_DECLINED; | |
190 } | |
191 | |
192 | |
503 | 193 static void * ngx_libc_cdecl |
194 ngx_regex_malloc(size_t size) | |
195
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195 { |
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196 ngx_pool_t *pool; |
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197 #if (NGX_THREADS) |
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198 ngx_core_tls_t *tls; |
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199 |
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200 if (ngx_threaded) { |
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201 tls = ngx_thread_get_tls(ngx_core_tls_key); |
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202 pool = tls->pool; |
3325 | 203 |
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204 } else { |
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205 pool = ngx_pcre_pool; |
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206 } |
3325 | 207 |
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208 #else |
3325 | 209 |
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210 pool = ngx_pcre_pool; |
3325 | 211 |
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212 #endif |
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213 |
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214 if (pool) { |
2049 | 215 return ngx_palloc(pool, size); |
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216 } |
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217 |
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218 return NULL; |
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219 } |
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220 |
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221 |
503 | 222 static void ngx_libc_cdecl |
223 ngx_regex_free(void *p) | |
195
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224 { |
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225 return; |
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226 } |