ft_lstmap: initial implementation

Makefile

@@ -6,7 +6,7 @@
 #    By: kcolin <marvin@42.fr>                      +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2024/10/14 13:43:59 by kcolin            #+#    #+#              #
-#    Updated: 2024/10/21 17:12:25 by kcolin           ###   ########.fr        #
+#    Updated: 2024/10/21 17:35:23 by kcolin           ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -54,7 +54,8 @@ BONUS_SOURCES =	ft_lstnew_bonus.c \
 	ft_lstadd_back_bonus.c \
 	ft_lstdelone_bonus.c \
 	ft_lstclear_bonus.c \
-	ft_lstiter_bonus.c
+	ft_lstiter_bonus.c \
+	ft_lstmap_bonus.c
 BONUS_OBJECTS = $(BONUS_SOURCES:.c=.o)
 
 .PHONY: all

ft_lstmap_bonus.c

@@ -0,0 +1,75 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_lstmap_bonus.c                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: kcolin <marvin@42.fr>                      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/10/21 17:14:36 by kcolin            #+#    #+#             */
+/*   Updated: 2024/10/21 17:28:42 by kcolin           ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+t_list	*ft_lstmap(t_list *lst, void *(*f)(void *), void (*del)(void *))
+{
+	t_list	*out;
+	t_list	*next;
+
+	out = NULL;
+	while (lst != NULL)
+	{
+		next = ft_lstnew((*f)(lst->content));
+		if (next == NULL)
+		{
+			ft_lstclear(&out, del);
+			return (NULL);
+		}
+		ft_lstadd_back(&out, next);
+		lst = lst->next;
+	}
+	return (out);
+}
+
+/*
+#include <stdio.h>
+#include <stdlib.h>
+
+void	*modify_string(void *data)
+{
+	char	*next;
+
+	next = ft_strjoin((char *)data, "!!!");
+	return (next);
+}
+
+void	print_string(void *data)
+{
+	printf("'%s'\n", (char *)data);
+}
+
+void	noop(void *data)
+{
+	(void)data;
+}
+
+int	main(void)
+{
+	t_list	*list;
+	t_list	*out;
+
+	list = ft_lstnew("Hello There");
+	ft_lstadd_front(&list, ft_lstnew("New Element"));
+	ft_lstadd_front(&list, ft_lstnew("New Element Again"));
+	ft_lstadd_front(&list, ft_lstnew("How? New Element"));
+	out = ft_lstmap(list, &modify_string, &free);
+	printf("=> Original:\n");
+	ft_lstiter(list, &print_string);
+	printf("=> Modified:\n");
+	ft_lstiter(out, &print_string);
+	ft_lstclear(&list, &noop);
+	ft_lstclear(&out, &free);
+	return (0);
+}
+*/

libft.h

@@ -77,5 +77,6 @@ void	ft_lstadd_back(t_list **lst, t_list *new);
 void	ft_lstdelone(t_list *lst, void (*del)(void *));
 void	ft_lstclear(t_list **lst, void (*del)(void *));
 void	ft_lstiter(t_list *lst, void (*f)(void *));
+t_list	*ft_lstmap(t_list *lst, void *(*f)(void *), void (*del)(void *));
 
 #endif