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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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558
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26 static ngx_inline void
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27 ngx_regex_malloc_init(ngx_pool_t *pool)
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0
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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;
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558
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35 return;
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0
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36 }
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37
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562
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38 #endif
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0
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39
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40 ngx_pcre_pool = pool;
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558
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41 }
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0
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42
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558
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43
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44 static ngx_inline void
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45 ngx_regex_malloc_done(void)
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46 {
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47 #if (NGX_THREADS)
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48 ngx_core_tls_t *tls;
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49
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50 if (ngx_threaded) {
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51 tls = ngx_thread_get_tls(ngx_core_tls_key);
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52 tls->pool = NULL;
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53 return;
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54 }
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55
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562
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56 #endif
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558
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57
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58 ngx_pcre_pool = NULL;
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59 }
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60
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61
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62 ngx_int_t
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63 ngx_regex_compile(ngx_regex_compile_t *rc)
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64 {
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65 int n, erroff;
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66 char *p;
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67 const char *errstr;
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68 ngx_regex_t *re;
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69
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70 ngx_regex_malloc_init(rc->pool);
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71
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72 re = pcre_compile((const char *) rc->pattern.data, (int) rc->options,
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0
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73 &errstr, &erroff, NULL);
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74
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558
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75 /* ensure that there is no current pool */
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76 ngx_regex_malloc_done();
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77
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0
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78 if (re == NULL) {
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558
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79 if ((size_t) erroff == rc->pattern.len) {
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80 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
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81 "pcre_compile() failed: %s in \"%V\"",
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82 errstr, &rc->pattern)
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83 - rc->err.data;
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84
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0
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85 } else {
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558
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86 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
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87 "pcre_compile() failed: %s in \"%V\" at \"%s\"",
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88 errstr, &rc->pattern, rc->pattern.data + erroff)
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89 - rc->err.data;
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0
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90 }
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558
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91
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92 return NGX_ERROR;
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93 }
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94
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95 rc->regex = re;
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96
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97 n = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &rc->captures);
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98 if (n < 0) {
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99 p = "pcre_fullinfo(\"%V\", PCRE_INFO_CAPTURECOUNT) failed: %d";
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100 goto failed;
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101 }
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102
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103 if (rc->captures == 0) {
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104 return NGX_OK;
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0
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105 }
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106
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558
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107 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMECOUNT, &rc->named_captures);
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108 if (n < 0) {
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109 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMECOUNT) failed: %d";
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110 goto failed;
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111 }
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112
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113 if (rc->named_captures == 0) {
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114 return NGX_OK;
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115 }
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0
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116
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558
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117 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMEENTRYSIZE, &rc->name_size);
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118 if (n < 0) {
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119 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMEENTRYSIZE) failed: %d";
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120 goto failed;
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0
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121 }
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558
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122
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123 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMETABLE, &rc->names);
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124 if (n < 0) {
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125 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMETABLE) failed: %d";
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126 goto failed;
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127 }
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0
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128
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558
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129 return NGX_OK;
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130
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131 failed:
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132
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133 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, p, &rc->pattern, n)
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134 - rc->err.data;
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135 return NGX_OK;
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0
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136 }
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137
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138
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52
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139 ngx_int_t
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140 ngx_regex_capture_count(ngx_regex_t *re)
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30
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141 {
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142 int rc, n;
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143
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144 n = 0;
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145
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146 rc = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &n);
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147
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50
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148 if (rc < 0) {
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149 return (ngx_int_t) rc;
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150 }
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151
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152 return (ngx_int_t) n;
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30
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153 }
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154
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155
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52
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156 ngx_int_t
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358
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157 ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log)
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158 {
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159 ngx_int_t n;
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160 ngx_uint_t i;
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161 ngx_regex_elt_t *re;
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162
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163 re = a->elts;
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164
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165 for (i = 0; i < a->nelts; i++) {
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166
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167 n = ngx_regex_exec(re[i].regex, s, NULL, 0);
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168
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169 if (n == NGX_REGEX_NO_MATCHED) {
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170 continue;
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171 }
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172
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173 if (n < 0) {
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174 ngx_log_error(NGX_LOG_ALERT, log, 0,
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558
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175 ngx_regex_exec_n " failed: %i on \"%V\" using \"%s\"",
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358
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176 n, s, re[i].name);
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177 return NGX_ERROR;
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178 }
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179
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180 /* match */
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181
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182 return NGX_OK;
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183 }
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184
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185 return NGX_DECLINED;
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186 }
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187
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188
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52
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189 static void * ngx_libc_cdecl
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190 ngx_regex_malloc(size_t size)
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0
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191 {
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192 ngx_pool_t *pool;
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193 #if (NGX_THREADS)
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194 ngx_core_tls_t *tls;
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195
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196 if (ngx_threaded) {
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197 tls = ngx_thread_get_tls(ngx_core_tls_key);
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198 pool = tls->pool;
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558
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199
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0
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200 } else {
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201 pool = ngx_pcre_pool;
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202 }
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558
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203
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0
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204 #else
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558
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205
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0
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206 pool = ngx_pcre_pool;
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558
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207
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0
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208 #endif
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209
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210 if (pool) {
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382
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211 return ngx_palloc(pool, size);
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0
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212 }
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213
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214 return NULL;
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215 }
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216
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217
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52
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218 static void ngx_libc_cdecl
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219 ngx_regex_free(void *p)
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0
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220 {
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221 return;
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222 }
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