linux-kernel - Re: strings

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Message-ID: <ZEIuh80SfDms30dc@1wt.eu>
Date:   Fri, 21 Apr 2023 08:34:47 +0200
From:   Willy Tarreau <w@....eu>
To:     Bagas Sanjaya <bagasdotme@...il.com>
Cc:     André Coelho <andrealbergaria@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: strings

[dropped innocents from the CC list]

On Fri, Apr 21, 2023 at 11:20:58AM +0700, Bagas Sanjaya wrote:
> On Thu, Apr 20, 2023 at 03:58:47AM +0100, André Coelho wrote:
> > greeting...if youre interessed in string algorihtm check
> > 
> > https://andrealbergaria.github.io/
> > 
> 
> Looks like above link is about hex arithmetic implemented using strings,
> right?

It looks more like a reinvention of the classical multi-byte string
processing (memcmp, memcpy, memmove etc).

> Also, on what use cases can your idea fit the kernel context? Or doesn't the
> kernel already have the implementation yet?

Sure it does, look at __crypto_memneq() for example, or more generally
at any memcmp() or memcpy() implementation from the last 30 years, for
example in glibc.

Regards,
Willy