13.5.2 Starting at the Last Node

This is the same as starting from the least item, except that we descend to the right.

506. <PBST traverser last initializer 506> =
void *
pbst_t_last (struct pbst_traverser *trav, struct pbst_table *tree) 
{
  assert (tree != NULL && trav != NULL);

  trav->pbst_table = tree;
  trav->pbst_node = tree->pbst_root;
  if (trav->pbst_node != NULL) 
    {
      while (trav->pbst_node->pbst_link[1] != NULL)
        trav->pbst_node = trav->pbst_node->pbst_link[1];
      return trav->pbst_node->pbst_data;
    }
  else 
    return NULL;
}

This code is included in 504 and 548.