static void l0_destroy(struct L0 *list)
{
do {
l1_destroy(list->down);
struct L0 *next = list->next;
free(list);
list = next;
}
while (list);
}
static void l0_destroy(struct L0 *list, int level)
{
do {
if (0 < level)
l1_destroy(list->down, level);
struct L0 *next = list->next;
if (0 == level)
free(list);
list = next;
}
while (list);
}
