libft/ft_strncmp.c at master · mozaBit/libft · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strncmp.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: bmetehri <bmetehri@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/11/11 11:30:51 by bmetehri          #+#    #+#             */
/*   Updated: 2023/01/03 16:19:07 by bmetehri         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

int	ft_strncmp(const char *s1, const char *s2, size_t n)
{
	size_t			i;
	unsigned char	*ss1;
	unsigned char	*ss2;

	if (s1 == NULL || s2 == NULL || n == 0)
		return (0);
	ss1 = (unsigned char *)s1;
	ss2 = (unsigned char *)s2;
	i = 0;
	if ((ft_strlen(s1) == 0 || ft_strlen(s2) == 0) && n == 0)
		return (0);
	while (ss1[i] && ss2[i] && i < n - 1 && ss1[i] == ss2[i])
		i++;
	return (ss1[i] - ss2[i]);
}