ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: aceauses <aceauses@student.42heilbronn.    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/03/16 10:35:23 by aceauses          #+#    #+#             */
/*   Updated: 2023/04/11 14:42:41 by aceauses         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	sign = 1;
	number = 0;
	while (*str == 32 || (*str >= 9 && *str <= 13))
		str++;
	if (*str == '-')
	{
		sign *= -1;
		str++;
	}
	else if (*str == '+')
		str++;
	while (*str >= 48 && *str <= 57)
	{
		number *= 10;
		number += *str - 48;
		str++;
	}
	return (number * sign);
}