libft/ft_strncmp.c at main · Akyria13/libft · GitHub

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strncmp.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: jowagner <jowagner@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2024/11/12 14:02:58 by jowagner          #+#    #+#             */
/*   Updated: 2024/12/12 19:50:18 by jowagner         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/**
 * @brief Compares up to n characters of two strings str1 and str2.
 *
 * @param str1 Pointer to the first string.
 * @param str2 Pointer to the second string.
 * @param n Maximum number of characters to compare.
 * @return An integer less than, equal to,
 * or greater than zero if str1 is found, respectively, to be less than,
 * to match, or be greater than str2.
 */
int	ft_strncmp(const char *s1, const char *s2, size_t n)
{
	size_t				i;
	unsigned const char	*str1;
	unsigned const char	*str2;

	i = 0;
	str1 = (unsigned const char *)s1;
	str2 = (unsigned const char *)s2;
	while (i < n)
	{
		if ((str1[i] != str2[i]) || str1[i] == '\0' || str2[i] == '\0')
			return (str1[i] - str2[i]);
		i++;
	}
	return (0);
}