ft_lstmap.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_lstmap.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jaeskim <jaeskim@student.42seoul.kr>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/09/28 00:17:00 by jaeskim           #+#    #+#             */
/*   Updated: 2020/09/30 22:09:26 by jaeskim          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/*
** ft_lstmap - Iterates the list 'lst' and applies the function
** 'f' to the content of each element.
** Creates a new list resulting of the successive applications of
** the function 'f'.
** The 'del' function is used to
** delete the content of an element if needed.
*/

t_list	*ft_lstmap(t_list *lst, void *(*f)(void *), void (*del)(void *))
{
	t_list *result;
	t_list *curr;

	if (!(result = ft_lstnew(f(lst->content))))
		return (0);
	curr = result;
	lst = lst->next;
	while (lst)
	{
		if (!(curr->next = ft_lstnew(f(lst->content))))
		{
			ft_lstclear(&result, del);
			return (0);
		}
		curr = curr->next;
		lst = lst->next;
	}
	return (result);
}