skeletton untested project

libft/ft_lstmap_bonus.c

@@ -0,0 +1,63 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_lstmap_bonus.c                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: thrieg <thrieg@student.42mulhouse.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/16 13:22:26 by thrieg            #+#    #+#             */
+/*   Updated: 2025/02/16 19:04:01 by thrieg           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+static t_list	*ft_safe_create(
+void *(*f)(void *),
+void (*del)(void *),
+void *content)
+{
+	void	*temp;
+	t_list	*ret;
+
+	temp = f(content);
+	if (!temp)
+		return (NULL);
+	ret = ft_lstnew(temp);
+	if (!ret)
+	{
+		del(temp);
+		return (NULL);
+	}
+	return (ret);
+}
+
+//returns NULL without doing anything else if any argument is NULL
+//returns NULL if any allocation fails
+t_list	*ft_lstmap(t_list *lst, void *(*f)(void *), void (*del)(void *))
+{
+	t_list	*new_list;
+	t_list	*new_node;
+	t_list	*temp;
+
+	if (!lst || !f || !del)
+		return (NULL);
+	new_node = ft_safe_create(f, del, lst->content);
+	if (!new_node)
+		return (NULL);
+	new_list = new_node;
+	lst = lst->next;
+	while (lst)
+	{
+		temp = ft_safe_create(f, del, lst->content);
+		if (!temp)
+		{
+			ft_lstclear(&new_list, del);
+			return (NULL);
+		}
+		new_node->next = temp;
+		new_node = new_node->next;
+		lst = lst->next;
+	}
+	return (new_list);
+}