ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tpouget <cassepipe@ymail.com>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/05/14 16:59:35 by tpouget           #+#    #+#             */
/*   Updated: 2020/12/02 00:20:22 by tpouget          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int			ft_atoi(const char *nptr)
{
	long	result;
	size_t	i;
	size_t	neg;

	result = 0;
	i = 0;
	neg = 0;
	while (ft_isspace(nptr[i]))
		i++;
	if (nptr[i] == '+')
		i++;
	else if (nptr[i] == '-')
		neg = ++i;
	while (ft_isdigit(nptr[i]))
	{
		result *= 10;
		result += nptr[i] - '0';
		i++;
	}
	return (neg ? -result : result);
}

/*
#include <stdio.h>
 int main(int argc, char **argv)
{
	if (argc !=2) return 0;

	printf("%d\n", atoi(argv[1]));
	printf("%d\n", ft_atoi(argv[1]));

	return 0;
}
*/