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

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strncmp.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: muganiev <gf.black.tv@gmail.com>           +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2022/05/16 14:40:43 by muganiev          #+#    #+#             */
/*   Updated: 2022/05/23 20:50:50 by muganiev         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

static int	compare_char(char c1, char c2)
{
	if ((unsigned char)c1 != (unsigned char)c2)
		return ((unsigned char)c1 - (unsigned char)c2);
	return (0);
}

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

	i = 0;
	while (s1[i] && s2[i] && i < n)
	{
		if (compare_char(s1[i], s2[i]))
			return (s1[i] - s2[i]);
		i++;
	}
	if (i < n)
		return (compare_char(s1[i], s2[i]));
	return (0);
}