nginx/src/core/ngx_regex.c

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#include <ngx_config.h>
#include <ngx_core.h>
static void *ngx_regex_malloc(size_t size);
static void ngx_regex_free(void *p);
/* THREADS: this pool should be private for each thread */
static ngx_pool_t *ngx_pcre_pool;
void ngx_regex_init()
{
pcre_malloc = ngx_regex_malloc;
pcre_free = ngx_regex_free;
}
ngx_regex_t *ngx_regex_compile(ngx_str_t *pattern, ngx_int_t options,
ngx_pool_t *pool, ngx_str_t *err)
{
int erroff;
const char *errstr;
ngx_regex_t *re;
ngx_pcre_pool = pool;
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re = pcre_compile((const char *) pattern->data, (int) options,
&errstr, &erroff, NULL);
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if (re == NULL) {
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if ((size_t) erroff == pattern->len) {
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ngx_snprintf((char *) err->data, err->len - 1,
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"pcre_compile() failed: %s in \"%s\"",
errstr, pattern->data);
} else {
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ngx_snprintf((char *) err->data, err->len - 1,
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"pcre_compile() failed: %s in \"%s\" at \"%s\"",
errstr, pattern->data, pattern->data + erroff);
}
}
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/* ensure that there is no current pool */
ngx_pcre_pool = NULL;
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return re;
}
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ngx_int_t ngx_regex_exec(ngx_regex_t *re, ngx_str_t *s,
int *matches, ngx_int_t size)
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{
int rc;
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rc = pcre_exec(re, NULL, (const char *) s->data, s->len, 0, 0,
matches, size);
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if (rc == -1) {
return NGX_DECLINED;
}
return rc;
}
static void *ngx_regex_malloc(size_t size)
{
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if (ngx_pcre_pool) {
return ngx_palloc(ngx_pcre_pool, size);
}
return NULL;
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}
static void ngx_regex_free(void *p)
{
return;
}