copy on git

libft/ft_lstlast_bonus.c

@@ -0,0 +1,44 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   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);
+}