17-binary_tree_sibling.c

#include "binary_trees.h"

/**
 * binary_tree_sibling - function that finds the sibling of a node
 * @node: the node to search
 * Return: the sibling
 */
binary_tree_t *binary_tree_sibling(binary_tree_t *node)
{
	if (!node || !node->parent)
		return (NULL);

	return ((node == node->parent->left) ?
		node->parent->right : node->parent->left);
}