18-binary_tree_uncle.c

#include "binary_trees.h"

/**
 * binary_tree_uncle - Find the uncle of a node
 * @node: A pointer to the node to find the uncle of
 *
 * Return: A pointer to the uncle node, or
 * NULL if no uncle is found
 */
binary_tree_t *binary_tree_uncle(binary_tree_t *node)
{
	if (node == NULL || node->parent == NULL || node->parent->parent == NULL)
		return (NULL);

	if (node->parent->parent->left == node->parent)
		return (node->parent->parent->right);
	else
		return (node->parent->parent->left);
}