/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_reverse_fun.c                                   :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: whaffman <whaffman@student.codam.nl>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/07/05 17:46:12 by whaffman          #+#    #+#             */
/*   Updated: 2024/07/05 18:00:33 by whaffman         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "ft_list.h"

void	ft_swap_ptr(void **ptr1, void **ptr2)
{
	void	*temp;

	temp = *ptr1;
	*ptr1 = *ptr2;
	*ptr2 = temp;
}

int	ft_list_size(t_list *begin_list)
{
	int	count;

	count = 1;
	if (!begin_list)
		return (0);
	while (begin_list->next)
	{
		begin_list = begin_list->next;
		count++;
	}
	return (count);
}

t_list	*ft_list_at(t_list *begin_list, unsigned int nbr)
{
	while (nbr > 0)
	{
		begin_list = begin_list->next;
		if (!begin_list)
			return (NULL);
		nbr--;
	}
	return (begin_list);
}

void	ft_list_reverse_fun(t_list *begin_list)
{
	int		front;
	int		back;
	t_list	*front_elem;
	t_list	*back_elem;

	front = 0;
	back = ft_list_size(begin_list) - 1;
	while (front < back)
	{
		front_elem = ft_list_at(begin_list, front);
		back_elem = ft_list_at(begin_list, back);
		ft_swap_ptr(&front_elem->data, &back_elem->data);
		front++;
		back--;
	}
}