From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: Paul Eggert Newsgroups: gmane.emacs.devel Subject: Re: encode-time vs decode-time Date: Mon, 5 Aug 2019 18:48:21 -0700 Organization: UCLA Computer Science Department Message-ID: References: <502b23f8-58ed-38ff-ae50-fae391129a10@cs.ucla.edu> <87v9viuivo.fsf@mouse.gnus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="178427"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 Cc: Andy Moreton , emacs-devel@gnu.org To: Lars Ingebrigtsen Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Aug 06 03:48:31 2019 Return-path: Envelope-to: ged-emacs-devel@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 1huoaV-000kJy-JT for ged-emacs-devel@m.gmane.org; Tue, 06 Aug 2019 03:48:31 +0200 Original-Received: from localhost ([::1]:58098 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1huoaU-0008Sk-0W for ged-emacs-devel@m.gmane.org; Mon, 05 Aug 2019 21:48:30 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:47163) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1huoaQ-0008SY-5h for emacs-devel@gnu.org; Mon, 05 Aug 2019 21:48:27 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1huoaP-0002yu-65 for emacs-devel@gnu.org; Mon, 05 Aug 2019 21:48:26 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:57238) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1huoaP-0002yh-05 for emacs-devel@gnu.org; Mon, 05 Aug 2019 21:48:25 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 1F13C1626E3; Mon, 5 Aug 2019 18:48:23 -0700 (PDT) Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id IZwJzJ5g6mR4; Mon, 5 Aug 2019 18:48:22 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 44D971626E5; Mon, 5 Aug 2019 18:48:22 -0700 (PDT) X-Virus-Scanned: amavisd-new at zimbra.cs.ucla.edu Original-Received: from zimbra.cs.ucla.edu ([127.0.0.1]) by localhost (zimbra.cs.ucla.edu [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id nuwp-X0D-ETP; Mon, 5 Aug 2019 18:48:22 -0700 (PDT) Original-Received: from [192.168.1.9] (cpe-23-242-74-103.socal.res.rr.com [23.242.74.103]) by zimbra.cs.ucla.edu (Postfix) with ESMTPSA id 1C1F11626E3; Mon, 5 Aug 2019 18:48:22 -0700 (PDT) In-Reply-To: <87v9viuivo.fsf@mouse.gnus.org> Content-Language: en-US X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 131.179.128.68 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 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.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:239200 Archived-At: Lars Ingebrigtsen wrote: > I think there should be a function to convert between > these "internal second time" formats. Like... `convert-time-format', > which would be like `(encode-time time 'list)' (etc). > > And then leave encode-time/decode-time a simple pair that would do > nothing but convert between "internal second time format" and "decoded > time format". OK, after some cogitation I installed something along those lines into master. I called the new function 'time-convert' by analogy with the existing functions time-add etc. So now, as you suggested, encode-time has reverted to its old role of converting from decoded timestamps to Lisp timestamps and its API is now simpler. I didn't follow your suggestion of adding another function that acts like current-time except it returns other Lisp timestamp formats, because (time-convert nil FORMAT) does that. I didn't follow Stefan's suggestion of adding another function that acts like current-time except it returns the (TICKS . HZ) format, because current-time is already planned do exactly that after the next release (when we will default CURRENT_TIME_LIST to false) and it'll be simpler if we have one function rather than two that do the same thing.