ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tpaaso <tpaaso@student.42.fr>              +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/10/16 13:43:58 by tpaaso            #+#    #+#             */
/*   Updated: 2022/04/11 12:27:39 by tpaaso           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	result = 0;
	sign = 1;
	while (*str == ' ' || *str == '\f' || *str == '\n' || *str == '\r'
		|| *str == '\v' || *str == '\t')
		str++;
	if (*str == '-')
		sign = -1;
	if (*str == '+' || *str == '-')
		str++;
	while (*str >= '0' && *str <= '9')
	{
		result = result * 10 + *str - '0';
		str++;
	}
	return (result * sign);
}