ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: zbenaiss <zbenaiss@student.1337.ma>        +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/10/24 20:18:39 by zbenaiss          #+#    #+#             */
/*   Updated: 2022/10/26 03:53:02 by zbenaiss         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_atoi(const char *str)
{
	int	operator;
	int	i;
	int	number;

	i = 0;
	number = 0;
	operator = 1;
	while ((str[i] >= 9 && str[i] <= 13) || str[i] == 32)
		i++;
	if (str[i] == '-' || str[i] == '+')
	{
		if (str[i] == '-')
			operator = -1;
		i++;
	}
	while (str[i] >= '0' && str[i] <= '9')
	{
		number *= 10;
		number += (str[i] - 48);
		i++;
	}
	return (number * operator);
}