ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: sel-mlil <sel-mlil@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/28 04:30:32 by sel-mlil          #+#    #+#             */
/*   Updated: 2024/11/01 20:28:21 by sel-mlil         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_atoi(const char *nptr)
{
	long long	nb;
	int			sign;
	int			i;

	nb = 0;
	sign = 1;
	i = 0;
	while ((nptr[i] >= 9 && nptr[i] <= 13) || nptr[i] == 32)
		i++;
	if (nptr[i] == '+' || nptr[i] == '-')
	{
		if (nptr[i] == '-')
			sign = -1;
		i++;
	}
	while (nptr[i] >= '0' && nptr[i] <= '9')
	{
		nb = nb * 10 + (nptr[i] - '0');
		i++;
	}
	return (nb * sign);
}