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94 lines
1.9 KiB
94 lines
1.9 KiB
9 years ago
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#include "common.h"
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#include "regexps.h"
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#include <regex.h>
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/* draft */
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#define HOST_REGEX "([12][0-9]{0,2}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3})"
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struct _regex {
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struct _regex *next;
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int matches;
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regex_t regex;
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};
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f2b_regex_t *
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f2b_regex_create(const char *pattern, bool icase) {
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f2b_regex_t *regex = NULL;
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int flags = REG_EXTENDED;
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size_t bufsize;
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char *buf = NULL;
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char *token = NULL;
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assert(pattern != NULL);
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if (icase)
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flags |= REG_ICASE;
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if ((token = strstr(pattern, HOST_TOKEN)) == NULL)
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return NULL;
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bufsize = strlen(pattern) + strlen(HOST_REGEX) + 1;
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if ((buf = alloca(bufsize)) == NULL)
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return NULL;
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memset(buf, 0x0, bufsize);
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strncpy(buf, pattern, token - pattern);
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strcat(buf, HOST_REGEX);
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strcat(buf, token + strlen(HOST_TOKEN));
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if ((regex = calloc(1, sizeof(f2b_regex_t))) == NULL)
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return NULL;
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if (regcomp(®ex->regex, buf, flags) == 0)
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return regex;
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FREE(regex);
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return NULL;
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}
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void
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f2b_regex_destroy(f2b_regex_t * regex) {
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regfree(®ex->regex);
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FREE(regex);
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}
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f2b_regex_t *
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f2b_regexlist_append(f2b_regex_t *list, f2b_regex_t *regex) {
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assert(regex != NULL);
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regex->next = list;
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return regex;
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}
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bool
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f2b_regexlist_match(f2b_regex_t *list, const char *line, char *matchbuf, size_t matchbuf_size) {
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size_t match_len = 0;
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regmatch_t match[2];
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for (; list != NULL; list = list->next) {
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if (regexec(&list->regex, line, 2, &match[0], 0) != 0)
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continue;
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list->matches++;
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match_len = match[1].rm_eo - match[1].rm_so;
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assert(matchbuf_size > match_len);
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strncpy(matchbuf, &line[match[1].rm_so], match_len);
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matchbuf[match_len] = '\0';
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return true;
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}
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return false;
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}
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f2b_regex_t *
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f2b_regexlist_destroy(f2b_regex_t *list) {
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f2b_regex_t *next;
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for (; list != NULL; list = next) {
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next = list->next;
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f2b_regex_destroy(list);
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}
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return NULL;
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}
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