ft_strncmp.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_strncmp.c                                       :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: mcombeau <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2021/11/24 17:09:14 by mcombeau          #+#    #+#             */
/*   Updated: 2021/12/06 15:15:37 by mcombeau         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "libft.h"

/*
	DESCRIPTION :
	The function ft_strncmp compares the first n bytes of the given strings
	s1 and s2.

	RETURN VALUE :
	An integer less than, equal to, or greater than zero if one of the first
	n bytes of s1 is found to be less than, to match, or to be greater than 
	s2.
*/

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

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