ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: sbin-jef <sbin-jef@student.42kl.edu.my>    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/06/30 05:42:31 by sbin-jef          #+#    #+#             */
/*   Updated: 2024/08/12 02:01:28 by sbin-jef         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_atoi(const char *str)
{
	int	i;
	int	x;
	int	y;

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