ft_strlen_bitwise.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strlen_bitwise.c                                :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: lsauvage <lsauvage@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2018/02/06 16:34:07 by lsauvage          #+#    #+#             */
/*   Updated: 2018/05/11 16:32:55 by lsauvage         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "./libft.h"

size_t		ft_strlen_bitwise(const char *str)
{
	size_t			len;
	unsigned long	x;

	len = 0;
	while (1)
	{
		x = *(unsigned *)str;
		if ((x & 0xFF) == 0)
			return (len);
		if ((x & 0xFF00) == 0)
			return (len + 1);
		if ((x & 0xFF0000) == 0)
			return (len + 2);
		if ((x & 0xFF000000) == 0)
			return (len + 3);
		str += 4;
		len += 4;
	}
}