snac2/xs_regex.h
2022-09-27 10:03:41 +02:00

48 lines
970 B
C

/* copyright (c) 2022 grunfink - MIT license */
#ifndef _XS_REGEX_H
#define _XS_REGEX_H
d_char *xs_regex_match(char *str, char *rx, int count);
#define xs_regex_matchall(str, rx) xs_regex_match(str, rx, 0xfffffff)
#ifdef XS_IMPLEMENTATION
#include <regex.h>
d_char *xs_regex_match(char *str, char *rx, int count)
/* returns a list with upto count matches */
{
regex_t re;
regmatch_t rm;
d_char *list = NULL;
int offset = 0;
char *p;
if (regcomp(&re, rx, REG_EXTENDED))
return NULL;
list = xs_list_new();
while (count > 0 && !regexec(&re, (p = str + offset), 1, &rm, offset > 0 ? REG_NOTBOL : 0)) {
/* add the first part */
list = xs_list_append_m(list, p + rm.rm_so, rm.rm_eo - rm.rm_so);
/* add the asciiz */
list = xs_str_cat(list, "");
offset += rm.rm_eo;
count--;
}
regfree(&re);
return list;
}
#endif /* XS_IMPLEMENTATION */
#endif /* XS_REGEX_H */