Function iterator_next

map.c:598–625

}

int iterator_next( map_iterator_t * it  )
{

	struct avl_node *q, *p;		/* Current node and its child. */

	if( it == NULL || it->map ==NULL || it->node == NULL)
		return -1;

	if( it->node->avl_link[1] )
	{
		it->node = it->node->avl_link[1];
		while( it->node->avl_link[0] )
			it->node = it->node->avl_link[0];

	}
	else
	{

		for (p = it->node, q = p->avl_parent ; ; p = q, q = q->avl_parent)
			if (q == NULL || p == q->avl_link[0])
			{
				it->node = q;
				return 0;
			}
	}

	return 0;
}


int iterator_prev( map_iterator_t * it  )