From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Richard Stallman Newsgroups: gmane.emacs.devel Subject: Re: Can watermarking Unicode text using invisible differences sneak through Emacs, or can Emacs detect it? Date: Wed, 09 Feb 2022 22:57:51 -0500 Message-ID: References: <87sftk49ih.fsf@yahoo.com> <837dawt0h4.fsf@gnu.org> <838rv9plyf.fsf@gnu.org> <837dasntoj.fsf@gnu.org> <834k5tl4a9.fsf@gnu.org> <87mtjkt6m9.fsf@gmail.com> <83ilu8htws.fsf@gnu.org> <3E718CA2-889F-4AEE-B79C-EB3A221D1CB2@gnu.org> <83o83wc7gs.fsf@gnu.org> <8335l5brov.fsf@gnu.org> <83mtjc838i.fsf@gnu.org> <83zgna7hyd.fsf@gnu.org> <83ee4l78rw.fsf@gnu.org> <83tudf2h4z.fsf@gnu.org> <83sfswz834.fsf@gnu.org> <83leymyfz8.fsf@gnu.org> <83sfstwnve.fsf@gnu.org> <83v8xoup27.fsf@gnu.org> Reply-To: rms@gnu.org Content-Type: text/plain; charset=Utf-8 Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="4847"; mail-complaints-to="usenet@ciao.gmane.io" Cc: psainty@orcon.net.nz, luangruo@yahoo.com, kevin.legouguec@gmail.com, emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Thu Feb 10 04:58:55 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 1nI0be-000130-Jy for ged-emacs-devel@m.gmane-mx.org; Thu, 10 Feb 2022 04:58:54 +0100 Original-Received: from localhost ([::1]:43006 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nI0bd-0002WX-7E for ged-emacs-devel@m.gmane-mx.org; Wed, 09 Feb 2022 22:58:53 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:52456) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nI0ah-0001OT-9K for emacs-devel@gnu.org; Wed, 09 Feb 2022 22:57:55 -0500 Original-Received: from [2001:470:142:3::e] (port=47206 helo=fencepost.gnu.org) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nI0ag-000359-CI; Wed, 09 Feb 2022 22:57:54 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnu.org; s=fencepost-gnu-org; h=Date:References:Subject:In-Reply-To:To:From: mime-version; bh=Kl90gdf7ej+z+WyYVZAairTxLhb5C1X2T7pdExx9W30=; b=o0Ekh7JhxTVB s21WegUcQX9b4uyXqDNmLf0HxT3Ca2giT7r5MWX72SGqJTQb4Dd68kpia1NR4WZQwzcPgdoEDPlUx KAJNWgL5yI+GHCz3aucKYSiVlx6YX/agRZqxs6ZaYJO8W94/7R632h1gy7CkFlTUInNH1adTBFy4i QegTpyL4mVklRS+MHdWb8BlgIvVomhMU0KaosDcB4Lu807Fr8eSNPQnOdoYNry1F65fjgwtG/8jp0 ej1d30X0OIN3qt3i9wcw528dtHtqvWdn2smr1VfecRJmyuleo6+6YeoFhk5TqKEgSN3cyFR176sVw FinsoEt4Vlo5/wIPe6kSeQ==; Original-Received: from rms by fencepost.gnu.org with local (Exim 4.90_1) (envelope-from ) id 1nI0ad-0001Xh-Mw; Wed, 09 Feb 2022 22:57:52 -0500 In-Reply-To: <83v8xoup27.fsf@gnu.org> (message from Eli Zaretskii on Wed, 09 Feb 2022 15:50:24 +0200) 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:286121 Archived-At: [[[ To any NSA and FBI agents reading my email: please consider ]]] [[[ whether defending the US Constitution against all enemies, ]]] [[[ foreign or domestic, requires you to follow Snowden's example. ]]] > > How do you represent an uncombined zigzag-above in Unicode? > > Put it after SPACE as a combination? > If I understand correctly what you want, you should use U+25CC DOTTED > CIRCLE before the combining character, not SPACE. Maybe that is right, but I don't understand it. Why is that right? Anyway, if DOTTED CIRCLE + COMBINING ZIGZAG ABOVE is the right way to represent a noncombiing ZIGZAG ABOVE, Emacs can use that. > > It wouldn't be very hard to add a list of extra decompositions that > > are not known to Unicode itself. > Sure, but that means we'd need some manually-maintained database > anyway. Maybe so. But these automatic methds will make a good simplification even if it doesn't simplify everything perfectly. -- Dr Richard Stallman (https://stallman.org) Chief GNUisance of the GNU Project (https://gnu.org) Founder, Free Software Foundation (https://fsf.org) Internet Hall-of-Famer (https://internethalloffame.org)