libft/ft_memcmp.c at master · sconstab/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: sconstab <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/05/23 14:04:49 by sconstab          #+#    #+#             */
/*   Updated: 2019/05/24 10:08:29 by sconstab         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_memcmp(const void *s1, const void *s2, size_t n)
{
	unsigned const char *cs1;
	unsigned const char *cs2;

	cs1 = (unsigned const char *)s1;
	cs2 = (unsigned const char *)s2;
	if (cs1 == cs2 || n == 0)
		return (0);
	while (n--)
	{
		if (*cs1 != *cs2)
			return (*cs1 - *cs2);
		cs1++;
		cs2++;
	}
	return (0);
}