From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.bugs Subject: bug#20258: 24.5; format-time-string miscounting of multibyte characters Date: Mon, 30 Sep 2019 10:01:17 +0300 Message-ID: <83d0fie08y.fsf@gnu.org> References: <87blv2a3aj.fsf@gnus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="102729"; mail-complaints-to="usenet@blaine.gmane.org" Cc: 20258@debbugs.gnu.org, stefan@marxist.se, gunnar.horrigmo@usit.uio.no To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Mon Sep 30 09:02:23 2019 Return-path: Envelope-to: geb-bug-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1iEphM-000QYP-D5 for geb-bug-gnu-emacs@m.gmane.org; Mon, 30 Sep 2019 09:02:20 +0200 Original-Received: from localhost ([::1]:46550 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iEphL-0001qE-2V for geb-bug-gnu-emacs@m.gmane.org; Mon, 30 Sep 2019 03:02:19 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:40169) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iEphB-0001po-As for bug-gnu-emacs@gnu.org; Mon, 30 Sep 2019 03:02:10 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iEph9-0001HA-0o for bug-gnu-emacs@gnu.org; Mon, 30 Sep 2019 03:02:09 -0400 Original-Received: from debbugs.gnu.org ([209.51.188.43]:47845) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1iEph6-0001El-Mp for bug-gnu-emacs@gnu.org; Mon, 30 Sep 2019 03:02:05 -0400 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1iEph6-0006qV-8g for bug-gnu-emacs@gnu.org; Mon, 30 Sep 2019 03:02:04 -0400 X-Loop: help-debbugs@gnu.org Resent-From: Eli Zaretskii Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org Resent-Date: Mon, 30 Sep 2019 07:02:04 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 20258 X-GNU-PR-Package: emacs Original-Received: via spool by 20258-submit@debbugs.gnu.org id=B20258.156982689626258 (code B ref 20258); Mon, 30 Sep 2019 07:02:04 +0000 Original-Received: (at 20258) by debbugs.gnu.org; 30 Sep 2019 07:01:36 +0000 Original-Received: from localhost ([127.0.0.1]:56665 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iEpge-0006pS-1R for submit@debbugs.gnu.org; Mon, 30 Sep 2019 03:01:36 -0400 Original-Received: from eggs.gnu.org ([209.51.188.92]:59256) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1iEpgc-0006pB-66 for 20258@debbugs.gnu.org; Mon, 30 Sep 2019 03:01:34 -0400 Original-Received: from fencepost.gnu.org ([2001:470:142:3::e]:33864) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1iEpgR-0000u9-UR; Mon, 30 Sep 2019 03:01:24 -0400 Original-Received: from [176.228.60.248] (port=2367 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1iEpgP-00061G-KI; Mon, 30 Sep 2019 03:01:22 -0400 In-reply-to: <87blv2a3aj.fsf@gnus.org> (message from Lars Ingebrigtsen on Mon, 30 Sep 2019 05:09:08 +0200) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.51.188.43 X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.org gmane.emacs.bugs:167824 Archived-At: > From: Lars Ingebrigtsen > 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.