ft_memcmp.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: youkim <youkim@student.42seoul.kr>         +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/05/08 19:25:44 by youkim            #+#    #+#             */
/*   Updated: 2021/05/08 19:41:35 by youkim           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int		ft_memcmp(const void *s1, const void *s2, size_t n)
{
	size_t				i;
	const unsigned char	*ptr1;
	const unsigned char	*ptr2;

	i = 0;
	ptr1 = (unsigned char *)s1;
	ptr2 = (unsigned char *)s2;
	while (n-- > 0)
	{
		if (ptr1[i] != ptr2[i])
			return (ptr1[i] - ptr2[i]);
		i++;
	}
	return (0);
}