ft_atoi.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_atoi.c                                          :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: oelkhiar <oelkhiar@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/10/10 10:52:08 by oelkhiar          #+#    #+#             */
/*   Updated: 2022/10/31 13:49:01 by oelkhiar         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_atoi(const char *str)
{
	int				cp;
	int				i;
	unsigned int	num;

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