42_libft/src/ft_memcmp.c at main · Bruno0798/42_libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: bsousa-d <bsousa-d@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/06/13 16:56:48 by bsousa-d          #+#    #+#             */
/*   Updated: 2023/10/09 15:02:25 by bsousa-d         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	s1 = (const unsigned char *)ptr1;
	s2 = (const unsigned char *)ptr2;
	if (num == 0)
		return (0);
	while (num--)
	{
		if (*s1 != *s2)
			return (*s1 - *s2);
		s1++;
		s2++;
	}
	return (0);
}