libft/ft_memcmp.c at main · inesmourato/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ibravo-m <ibravo-m@student.42lisboa.com    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/04/19 15:40:04 by ibravo-m          #+#    #+#             */
/*   Updated: 2024/05/02 15:20:24 by ibravo-m         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

// compares de first n bytes of memory between str1 and str2

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

	i = 0;
	s1 = (char *)str1;
	s2 = (char *)str2;
	while (i < n)
	{
		if (s1[i] != s2[i])
			return ((unsigned char)s1[i] - (unsigned char)s2[i]);
		i++;
	}
	return (0);
}
/*int main(void)
{
		char s1[] = "ola";
		char s2[] = "olA";
		int n = 3;

		int test = ft_memcmp(s1, s2, n);
		int test2 = memcmp(s1, s2, n);
		printf("%d\n", test);
		printf("%d\n", test2);
}*/