-/* Sets the balance factor of the specified AVL tree node. This must be
- * -1, 0, or 1. */
-static AVL_INLINE void
-avl_set_balance_factor(struct avl_tree_node *node, int balance_factor)
-{
- node->parent_balance =
- (node->parent_balance & ~3) | (balance_factor + 1);
-}
-