ft_memcmp.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mriant <marvin@42.fr>                      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/30 16:44:52 by mriant            #+#    #+#             */
/*   Updated: 2021/11/30 17:15:32 by mriant           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_memcmp(const void *s1, const void *s2, size_t n)
{
	unsigned char	*str1;
	unsigned char	*str2;
	size_t			i;

	if (n == 0)
		return (0);
	str1 = (unsigned char *)s1;
	str2 = (unsigned char *)s2;
	i = 0;
	while (i < n)
	{
		if (*(str1 + i) != *(str2 + i))
			return (*(str1 + i) - *(str2 + i));
		i ++;
	}
	if (i == n)
		return (*(str1 + i - 1) != *(str2 + i - 1));
	return (*(str1 + i) - *(str2 + i));
}