/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: sadjigui <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/05/22 12:44:41 by sadjigui          #+#    #+#             */
/*   Updated: 2021/12/08 19:13:51 by sadjigui         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	ft_space(const char *str)
{
	int	i;

	i = 0;
	while ((str[i] == 32) || (str[i] >= 9 && str[i] <= 13))
		i++;
	return (i);
}

long	ft_atoi(const char *str)
{
	int		i;
	int		sign;
	long	result;

	result = 0;
	i = ft_space(str);
	sign = 0;
	if (str[i] == '-' || str[i] == '+')
	{
		if (str[i] == '-')
			sign = 1;
		i++;
	}
	while (str[i] >= '0' && str[i] <= '9')
	{
		result = result * 10 + str[i] - 48;
		i++;
	}
	if (sign == 1)
		return (-result);
	else
		return (result);
}