list_utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   list_utils.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ikayacio <ikayacio@student.42istanbul.com  +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/06/20 11:17:11 by ikayacio          #+#    #+#             */
/*   Updated: 2023/06/20 11:18:06 by ikayacio         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "push_swap.h"

t_list	*ft_lstnew(long content)
{
	t_list	*new;

	new = (t_list *)malloc(sizeof(t_list));
	if (!new)
		return (NULL);
	new -> next = NULL;
	new -> content = content;
	new -> checked = 0;
	return (new);
}

t_list	*ft_lstlast(t_list *lst)
{
	if (!lst)
		return (0);
	while (lst != NULL)
	{
		if (lst -> next == NULL)
			return (lst);
		lst = lst -> next;
	}
	return (lst);
}

void	ft_lstadd_back(t_list **lst, t_list *new)
{
	t_list	*last;

	if (lst == NULL || new == NULL)
		return ;
	if (*lst == NULL)
		*lst = new;
	else
	{
		last = ft_lstlast(*lst);
		last -> next = new;
	}
}

int	ft_lstsize(t_list *lst)
{
	int	size;

	size = 0;
	while (lst != NULL)
	{
		lst = lst -> next;
		size++;
	}
	return (size);
}

void	ft_lstclear(t_list **lst)
{
	t_list	*temp;

	if (!lst)
		return ;
	while (*lst != NULL)
	{
		temp = (*lst)-> next;
		free(*lst);
		(*lst) = temp;
	}
	*lst = NULL;
}