ft_strncmp.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strncmp.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: ysaito <ysaito@student.42tokyo.jp>         +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2020/06/26 08:30:29 by ysaito            #+#    #+#             */
/*   Updated: 2021/11/01 20:55:00 by ysaito           ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_strncmp(const char *s1, const char *s2, size_t n)
{
	unsigned char	*us1;
	unsigned char	*us2;

	us1 = (unsigned char *)s1;
	us2 = (unsigned char *)s2;
	while (n-- > 0 && (*us1 != '\0' || *us2 != '\0'))
	{
		if (*us1 != *us2)
			return (*us1 - *us2);
		us1++;
		us2++;
	}
	return (0);
}