ft_memcmp.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: aalvarez <aalvarez@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/08/17 00:48:16 by aalvarez          #+#    #+#             */
/*   Updated: 2022/08/19 22:09:40 by aalvarez         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/**
 * @brief compares byte string s1 against byte string s2.
 * Both strings are assumed to be n bytes long. 
 * 
 * @param s1 the first string to be compared.
 * @param s2 the second string to be compared.
 * @param n max bytes to be compared.
 * @return int the difference between the first differing
 * byte (or 0 if any byte differs).
 */
int	ft_memcmp(const void *s1, const void *s2, size_t n)
{
	size_t	i;

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