static void l2_destroy(struct L2 *list)
{
do {
l3_destroy(list->down);
struct L2 *next = list->next;
free(list);
list = next;
}
while (list);
}
static void l2_destroy(struct L2 *list, int level)
{
do {
if (2 < level)
l3_destroy(list->down, level);
struct L2 *next = list->next;
if (2 == level)
free(list);
list = next;
}
while (list);
}
