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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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546
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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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546
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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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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
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546
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43 }
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0
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44
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546
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45
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46 static ngx_inline void
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47 ngx_regex_malloc_done(void)
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48 {
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49 #if (NGX_THREADS)
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50 ngx_core_tls_t *tls;
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51
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52 if (ngx_threaded) {
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53 tls = ngx_thread_get_tls(ngx_core_tls_key);
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54 tls->pool = NULL;
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55 return;
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56 }
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57
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58 #else
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59
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60 ngx_pcre_pool = NULL;
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61
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62 #endif
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63 }
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64
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65
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66 ngx_int_t
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67 ngx_regex_compile(ngx_regex_compile_t *rc)
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68 {
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69 int n, erroff;
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70 char *p;
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71 const char *errstr;
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72 ngx_regex_t *re;
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73
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74 ngx_regex_malloc_init(rc->pool);
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75
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76 re = pcre_compile((const char *) rc->pattern.data, (int) rc->options,
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0
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77 &errstr, &erroff, NULL);
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78
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546
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79 /* ensure that there is no current pool */
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80 ngx_regex_malloc_done();
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81
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0
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82 if (re == NULL) {
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546
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83 if ((size_t) erroff == rc->pattern.len) {
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84 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
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85 "pcre_compile() failed: %s in \"%V\"",
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86 errstr, &rc->pattern)
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87 - rc->err.data;
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88
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0
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89 } else {
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546
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90 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len,
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91 "pcre_compile() failed: %s in \"%V\" at \"%s\"",
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92 errstr, &rc->pattern, rc->pattern.data + erroff)
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93 - rc->err.data;
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0
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94 }
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546
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95
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96 return NGX_ERROR;
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97 }
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98
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99 rc->regex = re;
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100
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101 n = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &rc->captures);
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102 if (n < 0) {
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103 p = "pcre_fullinfo(\"%V\", PCRE_INFO_CAPTURECOUNT) failed: %d";
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104 goto failed;
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105 }
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106
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107 if (rc->captures == 0) {
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108 return NGX_OK;
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0
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109 }
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110
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546
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111 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMECOUNT, &rc->named_captures);
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112 if (n < 0) {
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113 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMECOUNT) failed: %d";
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114 goto failed;
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115 }
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116
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117 if (rc->named_captures == 0) {
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118 return NGX_OK;
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119 }
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0
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120
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546
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121 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMEENTRYSIZE, &rc->name_size);
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122 if (n < 0) {
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123 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMEENTRYSIZE) failed: %d";
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124 goto failed;
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0
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125 }
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546
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126
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127 n = pcre_fullinfo(re, NULL, PCRE_INFO_NAMETABLE, &rc->names);
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128 if (n < 0) {
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129 p = "pcre_fullinfo(\"%V\", PCRE_INFO_NAMETABLE) failed: %d";
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130 goto failed;
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131 }
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0
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132
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546
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133 return NGX_OK;
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134
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135 failed:
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136
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137 rc->err.len = ngx_snprintf(rc->err.data, rc->err.len, p, &rc->pattern, n)
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138 - rc->err.data;
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139 return NGX_OK;
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0
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140 }
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141
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142
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52
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143 ngx_int_t
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144 ngx_regex_capture_count(ngx_regex_t *re)
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30
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145 {
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146 int rc, n;
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147
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148 n = 0;
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149
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150 rc = pcre_fullinfo(re, NULL, PCRE_INFO_CAPTURECOUNT, &n);
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151
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50
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152 if (rc < 0) {
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153 return (ngx_int_t) rc;
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154 }
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155
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156 return (ngx_int_t) n;
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30
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157 }
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158
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159
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52
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160 ngx_int_t
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358
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161 ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log)
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162 {
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163 ngx_int_t n;
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164 ngx_uint_t i;
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165 ngx_regex_elt_t *re;
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166
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167 re = a->elts;
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168
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169 for (i = 0; i < a->nelts; i++) {
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170
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171 n = ngx_regex_exec(re[i].regex, s, NULL, 0);
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172
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173 if (n == NGX_REGEX_NO_MATCHED) {
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174 continue;
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175 }
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176
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177 if (n < 0) {
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178 ngx_log_error(NGX_LOG_ALERT, log, 0,
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546
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179 ngx_regex_exec_n " failed: %i on \"%V\" using \"%s\"",
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358
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180 n, s, re[i].name);
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181 return NGX_ERROR;
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182 }
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183
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184 /* match */
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185
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186 return NGX_OK;
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187 }
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188
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189 return NGX_DECLINED;
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190 }
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191
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192
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52
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193 static void * ngx_libc_cdecl
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194 ngx_regex_malloc(size_t size)
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0
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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;
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546
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203
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0
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204 } else {
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205 pool = ngx_pcre_pool;
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206 }
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546
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207
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0
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208 #else
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546
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209
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0
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210 pool = ngx_pcre_pool;
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546
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211
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0
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212 #endif
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213
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214 if (pool) {
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382
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215 return ngx_palloc(pool, size);
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0
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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
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52
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222 static void ngx_libc_cdecl
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223 ngx_regex_free(void *p)
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0
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224 {
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225 return;
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226 }
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