pushswap/src/finale.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        ::::::::            */
/*   finale.c                                           :+:    :+:            */
/*                                                     +:+                    */
/*   By: houtworm <codam@houtworm.net>                +#+                     */
/*                                                   +#+                      */
/*   Created: 2023/10/26 19:03:25 by houtworm      #+#    #+#                 */
/*   Updated: 2023/10/26 19:03:25 by houtworm      ########   odam.nl         */
/*                                                                            */
/* ************************************************************************** */

#include "../push_swap.h"

int	upordownfinal(t_varlist *vl)
{
	t_stack	*fstack;
	t_stack	*rstack;

	fstack = vl->a;
	rstack = vl->a;
	vl->direction = 3;
	if (vl->a->id == 1)
		vl->direction = 1;
	while (vl->direction == 3)
	{
		fstack = fstack->n;
		if (fstack->id == 1)
			vl->direction = 1;
		rstack = rstack->p;
		if (rstack->id == 1)
			vl->direction = 2;
	}
	return (0);
}

int	lowontop(t_varlist *vl)
{
	upordownfinal(vl);
	if (vl->direction == 1)
		while (1 != vl->a->id)
			ra(vl, 1);
	if (vl->direction == 2)
		while (1 != vl->a->id)
			rra(vl, 1);
	return (0);
}

int	freestacka(t_varlist *vl)
{
	t_stack	*cstack;
	t_stack	*dstack;

	while (vl->a)
	{
		cstack = vl->a;
		dstack = vl->a;
		if (cstack == cstack->n)
			vl->a = NULL;
		else
		{
			cstack = vl->a->p;
			vl->a = vl->a->n;
			cstack->n = vl->a;
			vl->a->p = cstack;
		}
		free (dstack);
	}
	return (0);
}

int	freestackb(t_varlist *vl)
{
	t_stack	*cstack;
	t_stack	*dstack;

	while (vl->b)
	{
		cstack = vl->b;
		dstack = vl->b;
		if (cstack == cstack->n)
			vl->b = NULL;
		else
		{
			cstack = vl->b->p;
			vl->b = vl->b->n;
			cstack->n = vl->b;
			vl->b->p = cstack;
		}
		free (dstack);
	}
	return (0);
}

int	freeall(t_varlist *vl)
{
	if (vl->a)
		freestacka(vl);
	if (vl->b)
		freestackb(vl);
	free (vl);
	return (0);
}