list_unlink_last.c

Go to the documentation of this file.

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   list_remove_last.c                                 :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: unite <marvin@42.fr>                       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/07/18 16:00:19 by unite             #+#    #+#             */
/*   Updated: 2020/07/21 22:32:36 by unite            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "list.h"
 
void    *list_unlink_last(t_list *alst)
{
    t_link  *tmp;
    void    *content;
 
    if (alst->size == 0)
        return (NULL);
    content = alst->tail->content;
    tmp = alst->tail;
    alst->tail = alst->tail->prev;
    free(tmp);
    alst->size--;
    if (alst->size == 0)
        alst->head = NULL;
    else
        alst->tail->next = NULL;
    return (content);
}