Function last_matching_pattern_from_list

dir.c:1423–1469

* Scan the given exclude list in reverse to see whether pathname * should be ignored. The first match (i.e. the last on the list), if * any, determines the fate. Returns the exclude_list element which * matched, or NULL for undecided. */

 * matched, or NULL for undecided.
 */
static struct path_pattern *last_matching_pattern_from_list(const char *pathname,
						       int pathlen,
						       const char *basename,
						       int *dtype,
						       struct pattern_list *pl,
						       struct index_state *istate)
{
	struct path_pattern *res = NULL; /* undecided */
	int i;

	if (!pl->nr)
		return NULL;	/* undefined */

	for (i = pl->nr - 1; 0 <= i; i--) {
		struct path_pattern *pattern = pl->patterns[i];
		const char *exclude = pattern->pattern;
		int prefix = pattern->nowildcardlen;

		if (pattern->flags & PATTERN_FLAG_MUSTBEDIR) {
			*dtype = resolve_dtype(*dtype, istate, pathname, pathlen);
			if (*dtype != DT_DIR)
				continue;
		}

		if (pattern->flags & PATTERN_FLAG_NODIR) {
			if (match_basename(basename,
					   pathlen - (basename - pathname),
					   exclude, prefix, pattern->patternlen,
					   pattern->flags)) {
				res = pattern;
				break;
			}
			continue;
		}

		assert(pattern->baselen == 0 ||
		       pattern->base[pattern->baselen - 1] == '/');
		if (match_pathname(pathname, pathlen,
				   pattern->base,
				   pattern->baselen ? pattern->baselen - 1 : 0,
				   exclude, prefix, pattern->patternlen)) {
			res = pattern;
			break;
		}
	}
	return res;
}

/*
 * Scan the list of patterns to determine if the ordered list