From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: Junio C Hamano <gitster@pobox.com>
Cc: "Carlo Marcelo Arenas Belón" <carenas@gmail.com>,
"Jonathan Nieder" <jrnieder@gmail.com>,
"Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>,
git@vger.kernel.org, "Jeff King" <peff@peff.net>,
"brian m. carlson" <sandals@crustytoothpaste.net>,
"Ilya Tretyakov" <it@it3xl.ru>
Subject: Re: [PATCH 2/3] credential: teach `credential_from_url()` a non-strict mode
Date: Fri, 24 Apr 2020 01:22:38 +0200 (CEST) [thread overview]
Message-ID: <nycvar.QRO.7.76.6.2004240121180.18039@tvgsbejvaqbjf.bet> (raw)
In-Reply-To: <xmqqtv19etkx.fsf@gitster.c.googlers.com>
Hi Junio,
On Thu, 23 Apr 2020, Junio C Hamano wrote:
> Junio C Hamano <gitster@pobox.com> writes:
>
> > Johannes Schindelin <Johannes.Schindelin@gmx.de> writes:
> >
> >> Yes (modulo doing "greater than" comparison on pointers which is IIRC not
> >> permitted in C in general).
> >
> > Of course, people write a loop like this
> >
> > char *cp, *ep = strchr(string, '\n');
> >
> > for (cp = string; cp < ep; cp++)
> > ...
> >
> > all the time, and forbidding pointer comparison would make the
> > language impossible to use ;-)
> >
> > I think you are confused with a different rule---what is not kosher
> > is to compare two pointers that do not point into elements of the
> > same array. Whether the comparison is done in (ptr1 < ptr2) way, or
> > (ptr2 - ptr1 < 0) way, does not change the equation.
Yep, that's my confusion all right.
> Having said that, between
>
> 1. if (strict || slash - url > 0)
> 2. if (strict || slash > url)
> c->host = url_decode_mem(host, slash - host);
>
> I think the former is moderately easier to read. It still has the
> same "Huh?" factor that a comparison between slash and URL guards
> the size of the region being decoded, which is slash - host, and
> makes the reader wonder how these two variables, URL and host,
> relate to each other at this point in the code, though, either way
> the comparison is spelled.
I fully agree! That's why I use `strict || slash - host > 0` in my next
iteration (actually, I decided to rename `strict`, but that's beside the
point).
Ciao,
Dscho
next prev parent reply other threads:[~2020-04-23 23:23 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-22 20:51 [PATCH 0/3] credential: handle partial URLs in config settings again Johannes Schindelin via GitGitGadget
2020-04-22 20:51 ` [PATCH 1/3] credential: fix grammar Johannes Schindelin via GitGitGadget
2020-04-22 23:29 ` Jonathan Nieder
2020-04-22 20:51 ` [PATCH 2/3] credential: teach `credential_from_url()` a non-strict mode Johannes Schindelin via GitGitGadget
2020-04-22 22:29 ` Junio C Hamano
2020-04-22 22:50 ` Johannes Schindelin
2020-04-22 23:02 ` Junio C Hamano
2020-04-22 23:38 ` Jonathan Nieder
2020-04-23 0:02 ` Carlo Arenas
2020-04-23 13:28 ` Johannes Schindelin
2020-04-23 21:22 ` Carlo Marcelo Arenas Belón
2020-04-23 22:03 ` Johannes Schindelin
2020-04-23 22:11 ` Junio C Hamano
2020-04-23 22:16 ` Junio C Hamano
2020-04-23 23:22 ` Johannes Schindelin [this message]
2020-04-23 22:50 ` Johannes Schindelin
2020-04-22 20:51 ` [PATCH 3/3] credential: handle `credential.<partial-URL>.<key>` again Johannes Schindelin via GitGitGadget
2020-04-22 23:57 ` Jonathan Nieder
2020-04-23 23:19 ` Johannes Schindelin
2020-04-22 22:13 ` [PATCH 0/3] credential: handle partial URLs in config settings again Jeff King
2020-04-22 22:26 ` Johannes Schindelin
2020-04-22 22:47 ` Jonathan Nieder
2020-04-23 22:11 ` Johannes Schindelin
2020-04-23 23:43 ` [PATCH v2 " Johannes Schindelin via GitGitGadget
2020-04-23 23:43 ` [PATCH v2 1/3] credential: fix grammar Johannes Schindelin via GitGitGadget
2020-04-23 23:43 ` [PATCH v2 2/3] credential: optionally allow partial URLs in credential_from_url_gently() Johannes Schindelin via GitGitGadget
2020-04-23 23:43 ` [PATCH v2 3/3] credential: handle `credential.<partial-URL>.<key>` again Johannes Schindelin via GitGitGadget
2020-04-24 0:05 ` Carlo Marcelo Arenas Belón
2020-04-24 0:16 ` Johannes Schindelin
2020-04-24 0:39 ` Carlo Marcelo Arenas Belón
2020-04-24 11:34 ` Johannes Schindelin
2020-04-24 0:34 ` Junio C Hamano
2020-04-24 0:40 ` Junio C Hamano
2020-04-24 11:36 ` Johannes Schindelin
2020-04-24 0:49 ` [PATCH v2 0/3] credential: handle partial URLs in config settings again Carlo Marcelo Arenas Belón
2020-04-24 11:49 ` [PATCH v3 " Johannes Schindelin via GitGitGadget
2020-04-24 11:49 ` [PATCH v3 1/3] credential: fix grammar Johannes Schindelin via GitGitGadget
2020-04-24 11:49 ` [PATCH v3 2/3] credential: optionally allow partial URLs in credential_from_url_gently() Johannes Schindelin via GitGitGadget
2020-04-24 11:49 ` [PATCH v3 3/3] credential: handle `credential.<partial-URL>.<key>` again Johannes Schindelin via GitGitGadget
2020-04-24 15:23 ` Carlo Marcelo Arenas Belón
2020-04-25 10:43 ` Johannes Schindelin
2020-04-24 22:20 ` Junio C Hamano
2020-04-24 22:29 ` Johannes Schindelin
2020-04-28 23:13 ` Junio C Hamano
2020-04-29 14:58 ` Johannes Schindelin
2020-04-29 15:36 ` Junio C Hamano
2020-05-01 19:58 ` Johannes Schindelin
2020-05-01 20:01 ` Junio C Hamano
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