1
2 /*
3 * Copyright (C) Igor Sysoev
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9
10
11 static void * ngx_libc_cdecl ngx_regex_malloc(size_t size);
12 static void ngx_libc_cdecl ngx_regex_free(void *p);
13
14
15 static ngx_pool_t *ngx_pcre_pool;
16
17
18 void
19 ngx_regex_init(void)
20 {
21 pcre_malloc = ngx_regex_malloc;
22 pcre_free = ngx_regex_free;
23 }
24
25
26 ngx_regex_t *
27 ngx_regex_compile(ngx_str_t *pattern, ngx_int_t options, ngx_pool_t *pool,
28 ngx_str_t *err)
29 {
30 int erroff;
31 const char *errstr;
32 ngx_regex_t *re;
33 #if (NGX_THREADS)
34 ngx_core_tls_t *tls;
35
36 #if (NGX_SUPPRESS_WARN)
37 tls = NULL;
38 #endif
39
40 if (ngx_threaded) {
41 tls = ngx_thread_get_tls(ngx_core_tls_key);
42 tls->pool = pool;
43 } else {
44 ngx_pcre_pool = pool;
45 }
46
47 #else
48
49 ngx_pcre_pool = pool;
50
51 #endif
52
53 re = pcre_compile((const char *) pattern->data, (int) options,
54 &errstr, &erroff, NULL);
55
56 if (re == NULL) {
57 if ((size_t) erroff == pattern->len) {
58 ngx_snprintf(err->data, err->len - 1,
59 "pcre_compile() failed: %s in \"%s\"%Z",
60 errstr, pattern->data);
61 } else {
62 ngx_snprintf(err->data, err->len - 1,
63 "pcre_compile() failed: %s in \"%s\" at \"%s\"%Z",
64 errstr, pattern->data, pattern->data + erroff);
65 }
66 }
67
68 /* ensure that there is no current pool */
69
70 #if (NGX_THREADS)
71 if (ngx_threaded) {
72 tls->pool = NULL;
73 } else {
74 ngx_pcre_pool = NULL;
75 }
76 #else
77 ngx_pcre_pool = NULL;
78 #endif
79
80 return re;
81 }
82
83
84 ngx_int_t
85 ngx_regex_capture_count(ngx_regex_t *re)
86 {
87 int rc, n;
88
89 n = 0;
90
91 rc = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &n);
92
93 if (rc < 0) {
94 return (ngx_int_t) rc;
95 }
96
97 return (ngx_int_t) n;
98 }
99
100
101 ngx_int_t
102 ngx_regex_exec(ngx_regex_t *re, ngx_str_t *s, int *captures, ngx_int_t size)
103 {
104 int rc;
105
106 rc = pcre_exec(re, NULL, (const char *) s->data, s->len, 0, 0,
107 captures, size);
108
109 if (rc == -1) {
110 return NGX_REGEX_NO_MATCHED;
111 }
112
113 return rc;
114 }
115
116
117 ngx_int_t
118 ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log)
119 {
120 ngx_int_t n;
121 ngx_uint_t i;
122 ngx_regex_elt_t *re;
123
124 re = a->elts;
125
126 for (i = 0; i < a->nelts; i++) {
127
128 n = ngx_regex_exec(re[i].regex, s, NULL, 0);
129
130 if (n == NGX_REGEX_NO_MATCHED) {
131 continue;
132 }
133
134 if (n < 0) {
135 ngx_log_error(NGX_LOG_ALERT, log, 0,
136 ngx_regex_exec_n " failed: %d on \"%V\" using \"%s\"",
137 n, s, re[i].name);
138 return NGX_ERROR;
139 }
140
141 /* match */
142
143 return NGX_OK;
144 }
145
146 return NGX_DECLINED;
147 }
148
149
150 static void * ngx_libc_cdecl
151 ngx_regex_malloc(size_t size)
152 {
153 ngx_pool_t *pool;
154 #if (NGX_THREADS)
155 ngx_core_tls_t *tls;
156
157 if (ngx_threaded) {
158 tls = ngx_thread_get_tls(ngx_core_tls_key);
159 pool = tls->pool;
160 } else {
161 pool = ngx_pcre_pool;
162 }
163 #else
164 pool = ngx_pcre_pool;
165 #endif
166
167 if (pool) {
168 return ngx_palloc(pool, size);
169 }
170
171 return NULL;
172 }
173
174
175 static void ngx_libc_cdecl
176 ngx_regex_free(void *p)
177 {
178 return;
179 }
180
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