lstadd_back ecrit avec main

srcs/bonus/ft_lstadd_back.c

@@ -1,13 +1,98 @@
-/* ************************************************************************** */
-/*                                                                            */
-/*                                                        :::      ::::::::   */
-/*   ft_lstadd_back.c                                   :+:      :+:    :+:   */
-/*                                                    +:+ +:+         +:+     */
-/*   By: hulamy <marvin@42.fr>                      +#+  +:+       +#+        */
-/*                                                +#+#+#+#+#+   +#+           */
-/*   Created: 2019/11/20 15:14:22 by hulamy            #+#    #+#             */
-/*   Updated: 2019/11/20 15:14:35 by hulamy           ###   ########.fr       */
-/*                                                                            */
-/* ************************************************************************** */
+/*
+**	add an element to the end of a list
+**	or first if list has no element so far
+*/
+
+/*	
+**	#include <libc.h>
+**	
+**	typedef struct		s_list
+**	{
+**		void			*content;
+**		struct s_list	*next;
+**	}					t_list;
+**	
+**	void	*ft_memcpy(void *dst, const void *src, size_t n)
+**	{
+**		size_t	i;
+**		char	*ptr;
+**		char	*ptr2;
+**	
+**		ptr = (char *)dst;
+**		ptr2 = (char *)src;
+**		i = -1;
+**		while (++i < n)
+**			ptr[i] = ptr2[i];
+**		return (dst);
+**	}
+**	
+**	t_list	*ft_lstnew(void *content)
+**	{
+**		t_list		*lst;
+**	
+**		if (!(lst = (t_list *)malloc(sizeof(*lst))))
+**			return (NULL);
+**		if (!content)
+**			lst->content = NULL;
+**		else
+**		{
+**			if (!(lst->content = malloc(sizeof(content))))
+**				return (NULL);
+**			ft_memcpy(lst->content, content, sizeof(content));
+**		}
+**		lst->next = NULL;
+**		return (lst);
+**	}
+**	
+**	void	ft_lstadd_back(t_list **alst, t_list *new);
+**	
+**	int	main(void)
+**	{
+**		char	tresor;
+**		char	matos;
+**		char	friends;
+**		t_list	*toto;
+**		t_list	*tmp;
+**	
+**		tresor = 'a';
+**		matos = 'b';
+**		friends = 'c';
+**		toto = ft_lstnew(&tresor);
+**		printf("toto->data          :%c\n",*(char*)(toto->content));
+**		tmp = ft_lstnew(&matos);
+**		ft_lstadd_back(&toto, tmp);
+**		printf("----------------------\n");
+**		printf("toto->data          :%c\n",*(char*)(toto->content));
+**		printf("toto->nxt->data     :%c\n",*(char*)(toto->next->content));
+**		tmp = ft_lstnew(&friends);
+**		ft_lstadd_back(&toto, tmp);
+**		printf("----------------------\n");
+**		printf("toto->data          :%c\n",*(char*)(toto->content));
+**		printf("toto->nxt->data     :%c\n",*(char*)(toto->next->content));
+**		printf("toto->nxt->nxt->data:%c\n",*(char*)(toto->next->next->content));
+**		printf("toto->nxt->nxt->nxt :%s\n",(char*)(toto->next->next->next));
+**		return (0);
+**	}
+*/	
 
 #include "libft.h"
+
+void	ft_lstadd_back(t_list **alst, t_list *new)
+{
+	t_list	*tmp;
+
+	if (alst)
+	{
+		tmp = *alst;
+		if (!tmp)
+			*alst = new;
+		else
+		{
+			while (tmp->next)
+				tmp = tmp->next;
+			tmp->next = new;
+		}
+		new->content = NULL;
+	}
+}
+