95 lines
2.7 KiB
Plaintext
95 lines
2.7 KiB
Plaintext
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_lstadd_back.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: hulamy <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/11/25 14:11:53 by hulamy #+# #+# */
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/* Updated: 2022/03/23 21:50:42 by simplonco ### ########.fr */
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/* */
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/* ************************************************************************** */
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/*
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** add an element to the end of a list, or first if list has no element yet
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** return NULL if element is NULL (eg, it returned from ft_lstnew and failed)
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** or else address to the element added
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*/
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/*
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** #include <libc.h>
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**
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** typedef struct s_list
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** {
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** void *content;
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** struct s_list *next;
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** } t_list;
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**
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** t_list *ft_lstnew(void *content)
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** {
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** t_list *lst;
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**
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** if (!(lst = (t_list *)malloc(sizeof(*lst))))
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** return (NULL);
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** if (!content)
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** lst->content = NULL;
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** else
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** lst->content = content;
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** lst->next = NULL;
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** return (lst);
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** }
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**
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** void ft_lstadd_back(t_list **alst, t_list *new);
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**
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** int main(void)
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** {
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** char tresor;
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** char matos;
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** char friends;
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** t_list *toto;
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** t_list *tmp;
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**
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** tresor = 'a';
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** matos = 'b';
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** friends = 'c';
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** toto = ft_lstnew(&tresor);
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** printf("toto->data :%c\n",*(char*)(toto->content));
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** tmp = ft_lstnew(&matos);
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** ft_lstadd_back(&toto, tmp);
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** printf("----------------------\n");
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** printf("toto->data :%c\n",*(char*)(toto->content));
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** printf("toto->nxt->data :%c\n",*(char*)(toto->next->content));
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** tmp = ft_lstnew(&friends);
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** ft_lstadd_back(&toto, tmp);
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** printf("----------------------\n");
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** printf("toto->data :%c\n",*(char*)(toto->content));
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** printf("toto->nxt->data :%c\n",*(char*)(toto->next->content));
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** printf("toto->nxt->nxt->data:%c\n",*(char*)(toto->next->next->content));
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** printf("toto->nxt->nxt->nxt :%s\n",(char*)(toto->next->next->next));
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** return (0);
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** }
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*/
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#include "libft.h"
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void *ft_lstadd_back(t_list **alst, t_list *new)
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{
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t_list *tmp;
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if (!new)
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return (NULL);
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if (alst)
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{
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tmp = *alst;
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if (!tmp)
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*alst = new;
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else
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{
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while (tmp->next)
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tmp = tmp->next;
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tmp->next = new;
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}
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}
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return (tmp);
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}
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