linux-kernel - RE: [PATCH] string: implement streq()

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Date:   Wed, 5 Apr 2023 10:45:36 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Alexey Dobriyan' <adobriyan@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] string: implement streq()

From: Alexey Dobriyan
> Sent: 04 April 2023 15:55
> 
> On Mon, Apr 03, 2023 at 02:16:41PM -0700, Andrew Morton wrote:
> > On Sat, 1 Apr 2023 20:48:05 +0300 Alexey Dobriyan <adobriyan@...il.com> wrote:
> >
> > > Most of the time strcmp() is being used, strings are checked for equality.
> > > Add wrapper to relay such intent (it is shorter to type, too).
> > >
> > > Use
> > > 	if (streq(s, "s")) {
> > > 	}
> > > or
> > > 	if (!streq(s, "s")) {
> > > 	}
> >
> > Gee, do we really want this?  I mean, we all know how strcmp() works,
> > don't we?
> >
> > I'm thinking it would be better to remove the various cute little
> > streq() macros and open-code strcmp(...)==0.
> 
> No! It's cool, trust me. Try it out, you'll like it.
> We "know" how strcmp() works because C didn't have streq() from
> the very beginning.
> 
> strcmp() is only for insertion into trees. Half of the time you need
> to read to the end of the expression to know if it is check for equality
> or inequality. With streq(), you don't.

Instead you have to go away and look up what a function
you've never heard of does.

Live with strcmp()...

	David

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