ft_atol.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atol.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rabougue <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2015/11/25 10:57:59 by rabougue          #+#    #+#             */
/*   Updated: 2016/06/10 14:45:20 by rabougue         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "./includes/libft.h"

long	ft_atol(const char *str)
{
	unsigned long	i;
	unsigned long	out;
	unsigned long	j;

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