From: Junio C Hamano <gitster@pobox.com>
To: Johannes Schindelin <Johannes.Schindelin@gmx.de>
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: Thu, 23 Apr 2020 15:16:30 -0700 [thread overview]
Message-ID: <xmqqtv19etkx.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <xmqqy2qlette.fsf@gitster.c.googlers.com> (Junio C. Hamano's message of "Thu, 23 Apr 2020 15:11:25 -0700")
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.
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.
Thanks.
next prev parent reply other threads:[~2020-04-23 22:16 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 [this message]
2020-04-23 23:22 ` Johannes Schindelin
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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