/*
 * Copyright (c) Camden Dixie O'Brien
 * SPDX-License-Identifier: AGPL-3.0-only
 */

#include "regex.h"

#include <stdlib.h>

static void class_free(class_t *c)
{
	if (NULL != c->contents)
		free(c->contents);
}

static void sequence_free(sequence_t *s)
{
	if (NULL != s->contents) {
		for (int i = 0; i < s->len; ++i) {
			switch (s->contents[i].type) {
			case TERM_TYPE_CLASS:
				class_free(&s->contents[i].class);
				break;
			case TERM_TYPE_REGEX:
				regex_free_children(&s->contents[i].regex);
				break;
			case TERM_TYPE_WILDCARD:
			case TERM_TYPE_LITERAL:
				break;
			}
		}
		free(s->contents);
	}
}

void regex_free_children(regex_t *r)
{
	sequence_free(&r->sequence);
	if (NULL != r->alternative) {
		regex_free_children(r->alternative);
		free(r->alternative);
	}
}