libft-42/ft_strncmp.c at main · LuizGandra/libft-42 · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strncmp.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: lcosta-g <lcosta-g@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/10/09 13:11:37 by lcosta-g          #+#    #+#             */
/*   Updated: 2024/10/26 11:29:40 by lcosta-g         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

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

	if (!n)
		return (0);
	i = 0;
	while (s1[i] && s1[i] == s2[i] && i < (n - 1))
		i++;
	return ((unsigned char)s1[i] - (unsigned char)s2[i]);
}

/*
#include <stdio.h>
int	main(void)
{
	printf("\"abcde\" and \"abcdz\" with n = 5 returns %i\n",
		ft_strncmp("abcde", "abcdz", 5)); // -21
	printf("\"abcde\" and \"abcdz\" with n = 3 returns %i\n",
		ft_strncmp("abcde", "abcdz", 3)); // 0
	printf("\"abcdefgh\" and \"abcdwxyz\" with n = 4 returns %i\n",
		ft_strncmp("abcdefgh", "abcdwxyz", 4));
	printf("\"abcde\" and \"abcde\" with n = 5 returns %i\n",
		ft_strncmp("abcde", "abcde", 5)); // 0
	printf("\"edcba\" and \"abcde\" with n = 100 returns %i\n",
		ft_strncmp("edcba", "abcde", 100)); // 4
	return (0);
}
*/