ft_atol.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atol.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ana-lda- <ana-lda-@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/06/26 13:19:55 by ana-lda-          #+#    #+#             */
/*   Updated: 2024/07/08 16:49:02 by ana-lda-         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

long	ft_atol(const char *str)
{
	int		i;
	int		neg;
	long	number;

	i = 0;
	neg = 1;
	number = 0;
	while (str[i] != '\0' && ((str[i] <= 13 && str[i] >= 9) || str[i] == ' '))
		i++;
	if (str[i] == '-' || str[i] == '+')
	{
		if (str[i] == '-')
			neg = -1;
		i++;
	}
	while (str[i] >= 48 && str[i] <= 57)
	{
		number = (number * 10) + (str[i] - 48);
		i++;
	}
	return (number * neg);
}