1#include "in_all.h"
 2#include "pattern.h"
 3#include <regex.h>
 4
 5/*
 6 * Interface to POSIX regular expression routines.
 7 */
 8
 9static regex_t pattern;
10static int pattern_valid;
11
12char *
13re_comp(char *s)
14{
15
16	if (!*s) {
17		return (char *)0;
18	}
19	if (pattern_valid) {
20		regfree(&pattern);
21		pattern_valid = 0;
22	}
23	if (regcomp(&pattern, s, 0) == 0) {
24		pattern_valid = 1;
25		return (char *)0;
26	}
27	return "Error in pattern";
28}
29
30int
31re_exec(char *s)
32{
33	return pattern_valid && regexec(&pattern, s, 0, (regmatch_t *)0, 0) == 0;
34}