ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: hnoh <marvin@42.fr>                        +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/01/03 10:16:26 by hnoh              #+#    #+#             */
/*   Updated: 2021/01/07 11:58:53 by hnoh             ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	sign = 1;
	result = 0;
	while (ft_isspace(*str))
		str++;
	if (*str == '+' || *str == '-')
	{
		if (*str == '-')
			sign *= -1;
		str++;
	}
	while (ft_isdigit(*str))
	{
		result = result * 10 + (*str++ - 48);
	}
	return (result * sign);
}