From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: Display of undisplayable characters: \U01F3A8 instead of diamond Date: Sun, 28 Aug 2022 13:56:13 +0000 Message-ID: References: <834jxxymbp.fsf@gnu.org> <83v8qcy83q.fsf@gnu.org> <83sflgy4n0.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="16519"; mail-complaints-to="usenet@ciao.gmane.io" Cc: rms@gnu.org, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Aug 28 15:57:58 2022 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1oSInU-00047r-G8 for ged-emacs-devel@m.gmane-mx.org; Sun, 28 Aug 2022 15:57:56 +0200 Original-Received: from localhost ([::1]:37600 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1oSInT-00066a-JW for ged-emacs-devel@m.gmane-mx.org; Sun, 28 Aug 2022 09:57:55 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:43484) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oSIlw-0005I9-Ej for emacs-devel@gnu.org; Sun, 28 Aug 2022 09:56:20 -0400 Original-Received: from mail.muc.de ([193.149.48.3]:18270) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1oSIlt-0007ZV-Hb for emacs-devel@gnu.org; Sun, 28 Aug 2022 09:56:20 -0400 Original-Received: (qmail 14413 invoked by uid 3782); 28 Aug 2022 15:56:14 +0200 Original-Received: from acm.muc.de (p2e5d5a4e.dip0.t-ipconnect.de [46.93.90.78]) (using STARTTLS) by colin.muc.de (tmda-ofmipd) with ESMTP; Sun, 28 Aug 2022 15:56:14 +0200 Original-Received: (qmail 10939 invoked by uid 1000); 28 Aug 2022 13:56:13 -0000 Content-Disposition: inline In-Reply-To: <83sflgy4n0.fsf@gnu.org> X-Submission-Agent: TMDA/1.3.x (Ph3nix) X-Primary-Address: acm@muc.de Received-SPF: pass client-ip=193.149.48.3; envelope-from=acm@muc.de; helo=mail.muc.de X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:294237 Archived-At: Hello, Eli. On Sun, Aug 28, 2022 at 14:44:03 +0300, Eli Zaretskii wrote: > > Date: Sun, 28 Aug 2022 11:07:24 +0000 > > Cc: rms@gnu.org, emacs-devel@gnu.org > > From: Alan Mackenzie > > > > Why is that coding-system-equal form there? > > > It was written based on the assumption that a terminal that supports > > > the UTF-8 encoding can also display the original characters reasonably > > > enough. Are you saying that the Linux console lies about that, and > > > those characters are displayed as hex codes? > > Well, I think "lies" is a bit strong, here. The Linux console uses UTF-8 > > characters, but is restricted to an arbitrary selection of 256 of them. > > An attempt to display any other character on the screen gets \ufffd > > displayed instead. Possibly, double-width characters aren't correctly > > handled, I don't know. My console is configured to use Latin-1, and it > > also includes some line graphic characters, but not the punctuation > > characters used by makeinfo. > If the console is configured for Latin-1, how come the terminal's > encoding is UTF-8? I think I meant that portion of UTF-8 which is based on Latin-1. > > Those characters were indeed displayed as hex codes, until I applied the > > patch below. > Thanks, installed on the release branch. Thanks! I look forward to the patch arriving in master. -- Alan Mackenzie (Nuremberg, Germany).