From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: Question about bignum usage Date: Sat, 13 Jul 2024 21:34:36 -0700 Organization: UCLA Computer Science Department Message-ID: <36c2fee0-f818-4357-a51f-197fc10608a3@cs.ucla.edu> References: <86frt8nn8b.fsf@gnu.org> <86ed8snk0p.fsf@gnu.org> <227390B1-09FC-4FD5-B9E9-2729624A0D13@gmail.com> <868qz0nd81.fsf@gnu.org> <1cbd7603-2185-4066-9e0f-a358daf28af1@cs.ucla.edu> <14CA211A-7795-4427-B3B3-870B6EB80108@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="37816"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla Thunderbird Cc: Eli Zaretskii , gerd.moellmann@gmail.com, emacs-devel@gnu.org To: =?UTF-8?Q?Mattias_Engdeg=C3=A5rd?= Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Sun Jul 14 06:35:23 2024 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 1sSqxG-0009XP-D2 for ged-emacs-devel@m.gmane-mx.org; Sun, 14 Jul 2024 06:35:22 +0200 Original-Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sSqwd-0000UK-Ou; Sun, 14 Jul 2024 00:34:43 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sSqwb-0000Tt-Of for emacs-devel@gnu.org; Sun, 14 Jul 2024 00:34:42 -0400 Original-Received: from mail.cs.ucla.edu ([131.179.128.66]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sSqwZ-0000Dp-Rc; Sun, 14 Jul 2024 00:34:41 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id 9ACE43C00E403; Sat, 13 Jul 2024 21:34:37 -0700 (PDT) Original-Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10032) with ESMTP id ACiO-Ht3Qg_v; Sat, 13 Jul 2024 21:34:37 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id 365B33C00E404; Sat, 13 Jul 2024 21:34:37 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.cs.ucla.edu 365B33C00E404 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.ucla.edu; s=9D0B346E-2AEB-11ED-9476-E14B719DCE6C; t=1720931677; bh=KrV0ETl/+uoINoNtmLNNN1rDYTwQ5pJKngX6MS/QJW4=; h=Message-ID:Date:MIME-Version:To:From; b=Ge98Pgrz/63x1jVQk2H5ZV5i4HzcDqbKXirHTBhmCZfV6vsyQmsSDo7L1I7APQfKo sTRNSh+NeykwdRcZod5qkgFeAEgNJR/R0BqCP8u9s8vkC7Kbp73Z9INIufJSjkUvDa Q5u2xWLVAGypaomhg1CxZmeejqD68BRPc2ri7ipG4GwmeKIQQPXhZRnJsd9iDa55r7 rF7ac9BDRhCm2iNKmJrllL8PVoLKCzFi3PQ1Ma+aGiPqkROOpGal7himUpYHv2XJFB NHwtawxGlVAyMpWGmg4YO88TplEuLS4/a/FQ8lTu2xrwQT2HDmA9is0fZX/bw1ykTQ juKt/G7TOzseA== X-Virus-Scanned: amavis at mail.cs.ucla.edu Original-Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10026) with ESMTP id kS5goUnhI2Xw; Sat, 13 Jul 2024 21:34:37 -0700 (PDT) Original-Received: from [192.168.254.12] (unknown [47.154.17.165]) by mail.cs.ucla.edu (Postfix) with ESMTPSA id 1AD293C00E403; Sat, 13 Jul 2024 21:34:37 -0700 (PDT) Content-Language: en-US In-Reply-To: <14CA211A-7795-4427-B3B3-870B6EB80108@gmail.com> Received-SPF: pass client-ip=131.179.128.66; envelope-from=eggert@cs.ucla.edu; helo=mail.cs.ucla.edu X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Xref: news.gmane.io gmane.emacs.devel:321621 Archived-At: On 2024-07-13 02:43, Mattias Engdeg=C3=A5rd wrote: > time decoding output sometimes depends on the exact form of the input= : >=20 > (time-convert '(0 3) t) =3D> (3 . 1) > (time-convert '(0 3 0) t) =3D> (3000000 . 1000000) > (time-convert '(0 3 0 0) t) =3D> (3000000000000 . 1000000000000) >=20 > Does it make sense to distinguish (A B), (A B 0) and (A B 0 0) like > this? Yes, because the input form has the same effective precision as the=20 output form. One would not want (time-convert '(0 3 0 0) t) and (time-convert '(0 3 0 1) t) to generate timestamps with different=20 precisions. If one knows the input timestamp has a particular resolution regardless=20 of its format, =CE=BCs for example, one can give that resolution to=20 time-convert, e.g., (time-convert TIMESTAMP 1000000).