ft_memcmp.c

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/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   ft_memcmp.c                                        :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: rmikhayl <rmikhayl@student.42london.c      +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/12/17 17:25:26 by rmikhayl          #+#    #+#             */
/*   Updated: 2023/12/17 17:25:26 by rmikhayl         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */
 
#include "libft.h"
 
/* *************************** ft_memcmp ************************************ */
/*   Compares the first 'n' bytes of two memory blocks 's1' and 's2'.         */
/*   Returns a value indicating their relative order, 0 if identical.         */
/*                                                                            */
/*   In layman's terms: It checks which set of data and if they're different, */
/*   returns a comparison result.                                             */
/* ************************************************************************** */
 
int ft_memcmp(const void *s1, const void *s2, size_t n)
{
    const unsigned char     *st1;
    const unsigned char     *st2;
 
    st1 = s1;
    st2 = s2;
    while (n--)
    {
        if (*st1 != *st2)
            return (*st1 - *st2);
        st1++;
        st2++;
    }
    return (0);
}