parse_date_abbr_search.c

const static timelib_tz_lookup_table* abbr_search(const char *word, timelib_long gmtoffset, int isdst)
{
	int abbr_found = 0, offset_found = 0;
	const timelib_tz_lookup_table  *tp, *abbr_found_elem = NULL, *offset_found_elem = NULL;

	if (strcasecmp("utc", word) == 0 || strcasecmp("gmt", word) == 0) {
		return timelib_timezone_utc;
	}

	for (tp = timelib_timezone_lookup; tp->name; tp++) {
		if (strcasecmp(word, tp->name) == 0) {
			if (!abbr_found) {
				abbr_found = 1;
				abbr_found_elem = tp;
				if (gmtoffset == -1) {
					return tp;
				}
			}
			if (tp->gmtoffset == gmtoffset) {
				return tp;
			}
		} else if (!offset_found && tp->gmtoffset == gmtoffset && (isdst == -1 || tp->type == isdst)) {
			offset_found = 1;
			offset_found_elem = tp;
			if (!*word) {
				return tp;
			}
		}
	}
	if (abbr_found) {
		return abbr_found_elem;
	} else if (offset_found) {
		return offset_found_elem;
	}

	return NULL;
}