ft_memcmp.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: adiaz-lo <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/11/21 13:24:15 by adiaz-lo          #+#    #+#             */
/*   Updated: 2020/01/13 12:54:52 by adiaz-lo         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

/*
** This function compares the first 'n' bytes (each interpreted as unsigned
** char) of the memory areas 's1' & 's2'.
*/

#include "libft.h"

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

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