ft_lstmap.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_lstmap.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: arepsa <arepsa@student.42porto.com>        +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/04/24 12:08:32 by arepsa            #+#    #+#             */
/*   Updated: 2023/04/24 12:10:59 by arepsa           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/*Applies the function ’f’ on the content of each node of lst. 
result is stored in a new list. 
The ’del’ function is used to delete the content of a node if needed.*/
/*lst - address of a pointer to a node.
f - address of the function used to iterate on the list.
del - address of the function to delete the content of a node if needed.*/
/*Return the new list, NULL if allocation fails*/
t_list	*ft_lstmap(t_list *lst, void *(*f)(void *), void (*del)(void *))
{
	t_list	*new_list;
	t_list	*element;

	new_list = NULL;
	while (lst)
	{
		element = ft_lstnew((*f)(lst->content));
		if (!element)
		{
			ft_lstclear(&new_list, del);
			return (NULL);
		}
		ft_lstadd_back(&new_list, element);
		lst = lst->next;
	}
	return (new_list);
}