ft_memcmp.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: kfujita <kfujita@student.42tokyo.jp>       +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/04/10 16:51:43 by kfujita           #+#    #+#             */
/*   Updated: 2022/04/25 23:42:00 by kfujita          ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include <stddef.h>
#include "ft_mem.h"
 
int ft_memcmp(const void *s1, const void *s2, size_t n)
{
    unsigned char   *p_s1;
    unsigned char   *p_s2;
 
    if (n == 0)
        return (0);
    p_s1 = (unsigned char *)s1;
    p_s2 = (unsigned char *)s2;
    while (--n > 0 && *p_s1 == *p_s2)
    {
        p_s1++;
        p_s2++;
    }
    return ((int)(*p_s1) - (int)(*p_s2));
}