/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_sqrt.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tosuman </var/spool/mail/tosuman>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/03/30 01:42:42 by tosuman           #+#    #+#             */
/*   Updated: 2023/03/30 01:42:45 by tosuman          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#define INT_MAX_SQRT 46340

int	ft_sqrt(int nb)
{
	int	sqrt;
	int	old_sqrt;
	int	max;
	int	min;

	min = 0;
	max = nb;
	if (nb > INT_MAX_SQRT)
		max = INT_MAX_SQRT;
	sqrt = max;
	while (1)
	{
		old_sqrt = sqrt;
		if (sqrt * sqrt == nb)
			return (sqrt);
		if (sqrt * sqrt > nb)
			max = sqrt;
		if (sqrt * sqrt < nb)
			min = sqrt;
		sqrt = (max + min) / 2;
		if (sqrt == old_sqrt)
			break ;
	}
	return (0);
}

/* ////
#include <stdio.h>
#include <limits.h>

int	main(void)
{
	int	i;

	printf("%d, %d\n", 0, ft_sqrt(0));
	i = -20;
	while (++i <= 4000)
		if (ft_sqrt(i))
			printf("%d, %d\n", i, ft_sqrt(i));
	printf("%d, %d\n", INT_MIN, ft_sqrt(INT_MIN));
	printf("%d, %d\n", INT_MAX, ft_sqrt(INT_MAX));
	i = INT_MAX;
	while (--i > INT_MAX - 1000000)
		if (ft_sqrt(i))
			printf("%d, %d\n", i, ft_sqrt(i));
	return (0);
}
*/ ////