ft_atoi.c

/* ************************************************************************** */
/*                                                          LE - /            */
/*                                                              /             */
/*   ft_atoi.c                                        .::    .:/ .      .::   */
/*                                                 +:+:+   +:    +:  +:+:+    */
/*   By: cgarrot <marvin@le-101.fr>                 +:+   +:    +:    +:+     */
/*                                                 #+#   #+    #+    #+#      */
/*   Created: 2018/10/06 06:24:13 by cgarrot      #+#   ##    ##    #+#       */
/*   Updated: 2018/10/09 16:54:19 by cgarrot     ###    #+. /#+    ###.fr     */
/*                                                         /                  */
/*                                                        /                   */
/* ************************************************************************** */

#include "libft.h"

int		ft_atoi(char const *str)
{
	int i;
	int neg;
	int nbr;

	i = 0;
	neg = 1;
	nbr = 0;
	while (str[i] == ' ' || str[i] == '\n' || str[i] == '\t' || str[i] == '\v'
			|| str[i] == '\f' || str[i] == '\r')
		i++;
	if (str[i] == '+')
		i++;
	if (str[i] == '-' && str[i - 1] != '+')
	{
		neg = -1;
		i++;
	}
	while (str[i] >= '0' && str[i] <= '9')
		nbr = nbr * 10 + str[i++] - '0';
	return (nbr * neg);
}