+bool btree_insert(struct btree *btree, const void *item)
+{
+ btree_iterator iter;
+
+ if (btree_find_last(btree, item, iter) && !btree->multi)
+ return false;
+
+ btree_insert_at(iter, item);
+ return true;
+}
+
+bool btree_remove(struct btree *btree, const void *key)
+{
+ btree_iterator iter;
+ bool success = false;
+ bool multi = btree->multi;
+
+ do {
+ if (btree_find_first(btree, key, iter)) {
+ btree_remove_at(iter);
+ success = true;
+ }
+ } while (multi);
+
+ return success;
+}
+
+void *btree_lookup(struct btree *btree, const void *key)
+{
+ btree_iterator iter;
+
+ if (btree_find_first(btree, key, iter))
+ return iter->item;
+
+ return NULL;
+}
+