From: Eli Zaretskii <eliz@gnu.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: 20258@debbugs.gnu.org, stefan@marxist.se, gunnar.horrigmo@usit.uio.no
Subject: bug#20258: 24.5; format-time-string miscounting of multibyte characters
Date: Mon, 30 Sep 2019 10:01:17 +0300 [thread overview]
Message-ID: <83d0fie08y.fsf@gnu.org> (raw)
In-Reply-To: <87blv2a3aj.fsf@gnus.org> (message from Lars Ingebrigtsen on Mon, 30 Sep 2019 05:09:08 +0200)
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Mon, 30 Sep 2019 05:09:08 +0200
> Cc: stefan@marxist.se, gunnar.horrigmo@usit.uio.no
>
> A field width N is an unsigned decimal integer with a leading digit nonzero.
> %NX is like %X, but takes up at least N positions.
> ---
>
> But the natural interpretation of "positions" isn't bytes, I think, and
> if is, then the doc string should say so.
>
> (let ((system-time-locale "nb_NO.UTF-8"))
> (format-time-string "%6a" (date-to-time "Sat Apr 4 16:14:40 2015")))
> => " lø."
>
> (if you have that locale in /etc/locale.gen.)
>
> But I seem to remember from previous discussions that this quirk is in
> the C strftime function? And Emacs just call it?
Yes, that's true.
> So I think what WIDTH means should be said explicitly in the doc string.
It can only warn that WIDTH _might_ be measured in bytes, since the
underlying implementation of strftime just might DTRT. Or not.
I think this should be raised as a bug to glibc developers, as their
documentation says "characters", according to my reading.
next prev parent reply other threads:[~2019-09-30 7:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-04 14:33 bug#20258: 24.5; format-time-string miscounting of multibyte characters Gunnar Horrigmo
2015-04-04 15:42 ` Eli Zaretskii
2015-04-04 16:03 ` Stefan Monnier
2015-04-04 16:42 ` Andreas Schwab
2019-09-30 0:35 ` Stefan Kangas
2019-09-30 3:09 ` Lars Ingebrigtsen
2019-09-30 7:01 ` Eli Zaretskii [this message]
2019-09-30 8:41 ` Andreas Schwab
2019-09-30 9:13 ` Eli Zaretskii
2019-09-30 13:39 ` Lars Ingebrigtsen
2019-09-30 13:58 ` Eli Zaretskii
2019-09-30 14:12 ` Lars Ingebrigtsen
2019-09-30 14:30 ` Gunnar Horrigmo
2019-09-30 14:44 ` Eli Zaretskii
2019-09-30 14:41 ` Eli Zaretskii
2019-09-30 14:48 ` Lars Ingebrigtsen
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