18-binary_tree_uncle.c

#include "binary_trees.h"

/**
 * binary_tree_uncle - finds the uncle of a node
 * @node: pointer to the node to find the uncl
 * Return: If node is NULL, return NULL
 * If node has no uncle, return NULL else return uncle
 */
binary_tree_t *binary_tree_uncle(binary_tree_t *node)
{
	if (node == NULL)
		return (NULL);
	if (node->parent == NULL)
		return (NULL);
	if (node->parent->parent == NULL)
		return (NULL);
	if (node->parent->parent->left == node->parent)
		return (node->parent->parent->right);
	return (node->parent->parent->left);
}