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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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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
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11 static void *ngx_regex_malloc(size_t size);
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12 static void ngx_regex_free(void *p);
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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
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18 void ngx_regex_init()
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19 {
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20 pcre_malloc = ngx_regex_malloc;
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21 pcre_free = ngx_regex_free;
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22 }
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23
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24
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25 ngx_regex_t *ngx_regex_compile(ngx_str_t *pattern, ngx_int_t options,
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26 ngx_pool_t *pool, ngx_str_t *err)
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27 {
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28 int erroff;
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29 const char *errstr;
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30 ngx_regex_t *re;
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31 #if (NGX_THREADS)
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32 ngx_core_tls_t *tls;
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33
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34 #if (NGX_SUPPRESS_WARN)
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35 tls = NULL;
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36 #endif
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37
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38 if (ngx_threaded) {
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39 tls = ngx_thread_get_tls(ngx_core_tls_key);
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40 tls->pool = pool;
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41 } else {
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42 ngx_pcre_pool = pool;
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43 }
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44
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45 #else
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46
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47 ngx_pcre_pool = pool;
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48
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49 #endif
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50
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51 re = pcre_compile((const char *) pattern->data, (int) options,
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52 &errstr, &erroff, NULL);
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53
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54 if (re == NULL) {
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55 if ((size_t) erroff == pattern->len) {
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56 ngx_snprintf((char *) err->data, err->len - 1,
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57 "pcre_compile() failed: %s in \"%s\"",
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58 errstr, pattern->data);
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59 } else {
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60 ngx_snprintf((char *) err->data, err->len - 1,
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61 "pcre_compile() failed: %s in \"%s\" at \"%s\"",
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62 errstr, pattern->data, pattern->data + erroff);
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63 }
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64 }
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65
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66 /* ensure that there is no current pool */
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67
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68 #if (NGX_THREADS)
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69 if (ngx_threaded) {
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70 tls->pool = NULL;
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71 } else {
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72 ngx_pcre_pool = NULL;
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73 }
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74 #else
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75 ngx_pcre_pool = NULL;
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76 #endif
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77
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78 return re;
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79 }
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80
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81
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82 ngx_int_t ngx_regex_exec(ngx_regex_t *re, ngx_str_t *s,
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83 int *matches, ngx_int_t size)
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84 {
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85 int rc;
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86
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87 rc = pcre_exec(re, NULL, (const char *) s->data, s->len, 0, 0,
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88 matches, size);
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89
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90 if (rc == -1) {
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91 return NGX_DECLINED;
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92 }
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93
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94 return rc;
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95 }
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96
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97
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98 static void *ngx_regex_malloc(size_t size)
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99 {
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100 ngx_pool_t *pool;
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101 #if (NGX_THREADS)
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102 ngx_core_tls_t *tls;
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103
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104 if (ngx_threaded) {
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105 tls = ngx_thread_get_tls(ngx_core_tls_key);
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106 pool = tls->pool;
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107 } else {
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108 pool = ngx_pcre_pool;
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109 }
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110 #else
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111 pool = ngx_pcre_pool;
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112 #endif
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113
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114 if (pool) {
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115 return ngx_palloc(pool, size);
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116 }
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117
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118 return NULL;
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119 }
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120
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121
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122 static void ngx_regex_free(void *p)
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123 {
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124 return;
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125 }
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