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/* (C) Copyright 2002 - 2021 Matthias Andree, see COPYING for license. */
#include <string.h>
#include "config.h"
#include "groupselect.h"
#include "ln_log.h"
pcre2_code_8 *gs_compile(const unsigned char *regex) {
int regex_errcode;
size_t regex_errpos;
pcre2_code_8 *re;
if (NULL == (re = pcre2_compile_8(regex, PCRE2_ZERO_TERMINATED, PCRE2_MULTILINE, ®ex_errcode,
®ex_errpos, NULL))) {
unsigned char regex_errmsg[1024];
int len = pcre2_get_error_message_8(regex_errcode, regex_errmsg, sizeof(regex_errmsg));
ln_log(LNLOG_SERR, LNLOG_CTOP, "Invalid group pattern "
"in \"%s\" at char #%lu: %s%s", regex, (unsigned long)regex_errpos, regex_errmsg,
len == PCRE2_ERROR_NOMEMORY ? "[...]" : "");
}
return re;
}
/* match s against PCRE p
* WARNING: If p is NULL, every string s is considered a match
* returns 1 for match, 0 for mismatch, negative for error */
int gs_match(const pcre2_code_8 *re, const unsigned char *s) {
int match;
pcre2_match_data_8 *match_data;
if (re == NULL) return 1;
match_data = pcre2_match_data_create_8(1, NULL);
if (NULL == match_data) {
ln_log(LNLOG_SERR, LNLOG_CTOP, "gs_match: out of memory allocating match_data");
return -1;
}
match = pcre2_match_8(re, s, PCRE2_ZERO_TERMINATED, 0,
PCRE2_ANCHORED, match_data, NULL);
pcre2_match_data_free_8(match_data);
if (match == PCRE2_ERROR_NOMATCH) return 0;
if (match >= 0) return 1;
return match; /* match < 0, but not PCRE2_ERROR_NOMATCH */
}
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