k = 0; p = (struct avl_node *) &tree->avl_root; for (cmp = -1; cmp != 0; cmp = tree->avl_compare (item, p->avl_data, tree->avl_param)) { int dir = cmp > 0; pa[k] = p; da[k++] = dir; p = p->avl_link[dir]; if (p == NULL) return NULL; } item = p->avl_data;