/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_lstlast_bonus.c                                 :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/16 12:21:13 by thrieg            #+#    #+#             */
/*   Updated: 2025/02/16 19:04:00 by thrieg           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

//returns NULL if lst is NULL
t_list	*ft_lstlast(t_list *lst)
{
	if (!lst)
		return (NULL);
	while (lst->next)
		lst = lst->next;
	return (lst);
}

/*
 * @return the element of `lst` at position `i`, NULL if doesn't exist.
 * `ft_lstat(lst, 0)` returns `lst`.
 */
t_list	*ft_lstat(t_list *lst, size_t i)
{
	size_t	j;

	if (lst == NULL)
		return (lst);
	j = 0;
	while (lst->next != NULL && j < i)
	{
		lst = lst->next;
		j++;
	}
	if (j != i)
		return (NULL);
	return (lst);
}