xbc_node_index
int __init xbc_node_index(struct xbc_node *node);
keys[depth++] = xbc_node_index(node);
sib->next = xbc_node_index(node);
node->parent = xbc_node_index(last_parent);
last_parent->child = xbc_node_index(node);
sib->next = xbc_node_index(node);
open_brace[brace_index++] = xbc_node_index(last_parent);
(open_brace[brace_index] != xbc_node_index(last_parent)))