From: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
To: git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: Re: [PATCH 4/6] *.h: add a few missing __attribute__((format))
Date: Mon, 12 Jul 2021 01:05:53 +0200 [thread overview]
Message-ID: <877dhw4exj.fsf@evledraar.gmail.com> (raw)
In-Reply-To: <patch-4.6-3bf8637c16a-20210710T084445Z-avarab@gmail.com>
On Sat, Jul 10 2021, Ævar Arnfjörð Bjarmason wrote:
So this:
> [...]
> For strbuf_addftime() let's add a strftime() format checker. Our
> function understands the non-portable %z and %Z, see
> c3fbf81a853 (strbuf: let strbuf_addftime handle %z and %Z itself,
> 2017-06-15).
>
> That might be an issue in theory, but in practice we have existing
> codepath that supplies a fixed string to strbuf_addftime(). We're
> unlikely to run into the "%z" and "%Z" case at all, since it's used by
> date.c and passed via e.g. "git log --date=<format>".
> [...]
> /**
> @@ -425,6 +426,7 @@ void strbuf_vaddf(struct strbuf *sb, const char *fmt, va_list ap);
> * `suppress_tz_name`, when set, expands %Z internally to the empty
> * string rather than passing it to `strftime`.
> */
> +__attribute__((format (strftime, 2, 0)))
> void strbuf_addftime(struct strbuf *sb, const char *fmt,
> const struct tm *tm, int tz_offset,
> int suppress_tz_name);
Fails with compat/mingw.[ch] doing:
[...]
compat/mingw.c:#undef strftime
compat/mingw.c-size_t mingw_strftime(char *s, size_t max,
compat/mingw.c- const char *format, const struct tm *tm)
[...]
compat/mingw.h:#define strftime mingw_strftime
[...]
What's a good macro idiom to dig oneself out of that hole? The only
similar thing I could find was NORETURN in git-compat-util.h being
defined differently on various platforms, and then things like:
+#if !defined(__MINGW32__) && !defined(_MSC_VER)
__attribute__((format (strftime, 2, 0)))
+#endif
Which seems to work, and may be the simplest workaround...
next prev parent reply other threads:[~2021-07-11 23:19 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-10 8:47 [PATCH 0/6] add missing __attribute__((format)) Ævar Arnfjörð Bjarmason
2021-07-10 8:47 ` [PATCH 1/6] *.c static functions: don't forward-declare __attribute__ Ævar Arnfjörð Bjarmason
2021-07-10 8:47 ` [PATCH 2/6] sequencer.c: move static function to avoid forward decl Ævar Arnfjörð Bjarmason
2021-07-10 8:47 ` [PATCH 3/6] *.c static functions: add missing __attribute__((format)) Ævar Arnfjörð Bjarmason
2021-07-10 8:47 ` [PATCH 4/6] *.h: add a few " Ævar Arnfjörð Bjarmason
2021-07-11 23:05 ` Ævar Arnfjörð Bjarmason [this message]
2021-07-12 20:09 ` Jeff King
2021-07-10 8:47 ` [PATCH 5/6] bugreport.c: tweak cmd_bugreport() to use __attribute__((printf)) Ævar Arnfjörð Bjarmason
2021-07-12 19:39 ` Junio C Hamano
2021-07-10 8:47 ` [PATCH 6/6] git-compat-util.h: add __attribute__((printf)) to git_*printf* Ævar Arnfjörð Bjarmason
2021-07-12 20:13 ` Jeff King
2021-07-12 20:26 ` Randall S. Becker
2021-07-12 21:45 ` Jeff King
2021-07-12 21:58 ` Randall S. Becker
2021-07-12 20:14 ` [PATCH 0/6] add missing __attribute__((format)) Jeff King
2021-07-13 8:05 ` [PATCH v2 " Ævar Arnfjörð Bjarmason
2021-07-13 8:05 ` [PATCH v2 1/6] *.c static functions: don't forward-declare __attribute__ Ævar Arnfjörð Bjarmason
2021-07-13 8:05 ` [PATCH v2 2/6] sequencer.c: move static function to avoid forward decl Ævar Arnfjörð Bjarmason
2021-07-13 8:05 ` [PATCH v2 3/6] *.c static functions: add missing __attribute__((format)) Ævar Arnfjörð Bjarmason
2021-07-13 8:05 ` [PATCH v2 4/6] *.h: add a few " Ævar Arnfjörð Bjarmason
2021-07-13 8:05 ` [PATCH v2 5/6] advice.h: add missing __attribute__((format)) & fix usage Ævar Arnfjörð Bjarmason
2021-07-13 8:05 ` [PATCH v2 6/6] strbuf.h: add a comment about "missing" strftime() checking Ævar Arnfjörð Bjarmason
2021-07-13 21:15 ` Jeff King
2021-07-13 21:17 ` [PATCH v2 0/6] add missing __attribute__((format)) Jeff King
2021-07-13 22:29 ` Junio C Hamano
2021-07-13 23:05 ` Ævar Arnfjörð Bjarmason
2021-07-14 0:15 ` [PATCH v3 0/5] " Ævar Arnfjörð Bjarmason
2021-07-14 0:15 ` [PATCH v3 1/5] *.c static functions: don't forward-declare __attribute__ Ævar Arnfjörð Bjarmason
2021-07-14 0:15 ` [PATCH v3 2/5] sequencer.c: move static function to avoid forward decl Ævar Arnfjörð Bjarmason
2021-07-14 0:15 ` [PATCH v3 3/5] *.c static functions: add missing __attribute__((format)) Ævar Arnfjörð Bjarmason
2021-07-14 0:15 ` [PATCH v3 4/5] *.h: add a few " Ævar Arnfjörð Bjarmason
2021-07-14 0:15 ` [PATCH v3 5/5] advice.h: add missing __attribute__((format)) & fix usage Ævar Arnfjörð Bjarmason
2021-07-14 16:07 ` [PATCH v3 0/5] add missing __attribute__((format)) Junio C Hamano
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=877dhw4exj.fsf@evledraar.gmail.com \
--to=avarab@gmail.com \
--cc=git@vger.kernel.org \
--cc=gitster@pobox.com \
--cc=peff@peff.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).