ft_atol.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atol.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: atoof <atoof@student.hive.fi>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/04/11 17:32:52 by atoof             #+#    #+#             */
/*   Updated: 2023/04/11 18:04:00 by atoof            ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "push_swap.h"

long	ft_atol(const char *str)
{
	int		i;
	long	n;
	int		sign;

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