ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: almarcos <almarcos@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/07/26 15:15:31 by almarcos          #+#    #+#             */
/*   Updated: 2023/10/09 11:52:14 by almarcos         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	result = 0;
	sign = 1;
	i = 0;
	while (str[i] == ' ' || (str[i] >= 9 && str[i] <= 13))
		i++;
	if (str[i] == '-' || str[i] == '+')
		sign = 1 - 2 * (str[i++] == '-');
	while (ft_isdigit(str[i]))
		result = 10 * result + (str[i++] - '0');
	return (result * sign);
}