ft_atoi.c

/* ************************************************************************** */
/*                                                          LE - /            */
/*                                                              /             */
/*   ft_atoi.c                                        .::    .:/ .      .::   */
/*                                                 +:+:+   +:    +:  +:+:+    */
/*   By: brobicho <marvin@le-101.fr>                +:+   +:    +:    +:+     */
/*                                                 #+#   #+    #+    #+#      */
/*   Created: 2017/12/04 03:19:53 by brobicho     #+#   ##    ##    #+#       */
/*   Updated: 2017/12/04 03:19:53 by brobicho    ###    #+. /#+    ###.fr     */
/*                                                         /                  */
/*                                                        /                   */
/* ************************************************************************** */

#include "libft.h"

int		ft_atoi(const char *str)
{
	int	i;
	int nb;
	int pos;

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