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0
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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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52
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11 static void * ngx_libc_cdecl ngx_regex_malloc(size_t size);
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12 static void ngx_libc_cdecl ngx_regex_free(void *p);
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0
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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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52
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18 void
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19 ngx_regex_init(void)
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0
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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
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52
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26 ngx_regex_t *
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27 ngx_regex_compile(ngx_str_t *pattern, ngx_int_t options, ngx_pool_t *pool,
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28 ngx_str_t *err)
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0
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29 {
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30 int erroff;
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31 const char *errstr;
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32 ngx_regex_t *re;
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33 #if (NGX_THREADS)
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34 ngx_core_tls_t *tls;
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35
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36 #if (NGX_SUPPRESS_WARN)
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37 tls = NULL;
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38 #endif
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39
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40 if (ngx_threaded) {
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41 tls = ngx_thread_get_tls(ngx_core_tls_key);
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42 tls->pool = pool;
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43 } else {
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44 ngx_pcre_pool = pool;
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45 }
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46
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47 #else
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48
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49 ngx_pcre_pool = pool;
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50
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51 #endif
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52
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53 re = pcre_compile((const char *) pattern->data, (int) options,
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54 &errstr, &erroff, NULL);
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55
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56 if (re == NULL) {
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57 if ((size_t) erroff == pattern->len) {
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10
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58 ngx_snprintf(err->data, err->len - 1,
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28
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59 "pcre_compile() failed: %s in \"%s\"%Z",
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0
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60 errstr, pattern->data);
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61 } else {
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10
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62 ngx_snprintf(err->data, err->len - 1,
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28
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63 "pcre_compile() failed: %s in \"%s\" at \"%s\"%Z",
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0
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64 errstr, pattern->data, pattern->data + erroff);
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65 }
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66 }
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67
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68 /* ensure that there is no current pool */
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69
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70 #if (NGX_THREADS)
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71 if (ngx_threaded) {
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72 tls->pool = NULL;
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73 } else {
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74 ngx_pcre_pool = NULL;
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75 }
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76 #else
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77 ngx_pcre_pool = NULL;
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78 #endif
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79
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80 return re;
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81 }
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82
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83
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52
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84 ngx_int_t
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85 ngx_regex_capture_count(ngx_regex_t *re)
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30
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86 {
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87 int rc, n;
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88
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89 n = 0;
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90
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91 rc = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &n);
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92
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50
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93 if (rc < 0) {
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94 return (ngx_int_t) rc;
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95 }
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96
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97 return (ngx_int_t) n;
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30
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98 }
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99
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100
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52
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101 ngx_int_t
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102 ngx_regex_exec(ngx_regex_t *re, ngx_str_t *s, int *captures, ngx_int_t size)
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0
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103 {
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104 int rc;
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105
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106 rc = pcre_exec(re, NULL, (const char *) s->data, s->len, 0, 0,
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30
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107 captures, size);
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0
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108
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109 if (rc == -1) {
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30
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110 return NGX_REGEX_NO_MATCHED;
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0
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111 }
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112
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113 return rc;
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114 }
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115
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116
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358
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117 ngx_int_t
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118 ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log)
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119 {
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120 ngx_int_t n;
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121 ngx_uint_t i;
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122 ngx_regex_elt_t *re;
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123
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124 re = a->elts;
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125
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126 for (i = 0; i < a->nelts; i++) {
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127
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128 n = ngx_regex_exec(re[i].regex, s, NULL, 0);
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129
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130 if (n == NGX_REGEX_NO_MATCHED) {
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131 continue;
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132 }
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133
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134 if (n < 0) {
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135 ngx_log_error(NGX_LOG_ALERT, log, 0,
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136 ngx_regex_exec_n " failed: %d on \"%V\" using \"%s\"",
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137 n, s, re[i].name);
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138 return NGX_ERROR;
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139 }
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140
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141 /* match */
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142
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143 return NGX_OK;
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144 }
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145
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146 return NGX_DECLINED;
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147 }
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148
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149
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52
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150 static void * ngx_libc_cdecl
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151 ngx_regex_malloc(size_t size)
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0
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152 {
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153 ngx_pool_t *pool;
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154 #if (NGX_THREADS)
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155 ngx_core_tls_t *tls;
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156
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157 if (ngx_threaded) {
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158 tls = ngx_thread_get_tls(ngx_core_tls_key);
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159 pool = tls->pool;
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160 } else {
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161 pool = ngx_pcre_pool;
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162 }
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163 #else
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164 pool = ngx_pcre_pool;
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165 #endif
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166
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167 if (pool) {
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168 return ngx_palloc(pool, size);
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169 }
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170
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171 return NULL;
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172 }
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173
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174
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52
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175 static void ngx_libc_cdecl
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176 ngx_regex_free(void *p)
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0
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177 {
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178 return;
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179 }
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