Function node_clear_slot

python/bplustree_c_src/node_ops.c:148–169

Clear a single slot: decref or destroy payload and null out key/value or child pointer */

/* Clear a single slot: decref or destroy payload and null out key/value or child pointer */
static void node_clear_slot(BPlusNode *node, int i) {
    if (i < 0 || i >= node->capacity) {
        return;  /* Invalid index */
    }
    
    if (node->type == NODE_LEAF) {
        Py_XDECREF(node_get_key(node, i));
        Py_XDECREF(node_get_value(node, i));
        node_set_key(node, i, NULL);
        node_set_value(node, i, NULL);
    } else {
        /* For branch nodes, we only clear during deletion operations
         * where it's safe to destroy the child subtree */
        BPlusNode *child = node_get_child(node, i);
        if (child) {
            node_destroy(child);
        }
        Py_XDECREF(node_get_key(node, i));
        node_set_key(node, i, NULL);
        node_set_child(node, i, NULL);
    }
}

/* Insert into leaf node */
int node_insert_leaf(BPlusNode *node, PyObject *key, PyObject *value,