ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: macelik <macelik@student.42.fr>            +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/02/15 12:24:38 by macelik           #+#    #+#             */
/*   Updated: 2023/02/15 12:24:52 by macelik          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_atoi(const char *str)
{
	int	i;
	int	count;
	int	result;

	i = 0;
	count = 1;
	result = 0;
	while ((str[i] >= 9 && str[i] <= 13) || str[i] == 32)
		i++;
	if (str[i] == 43 || str[i] == 45)
	{
		if (str[i] == 45)
			count *= -1;
		i++;
	}
	while (str[i] >= 48 && str[i] <= 57)
	{
		result *= 10;
		result += str[i] - 48;
		i++;
	}
	return (count * result);
}