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: [Emacs-diffs] master 6cfda69 1/2: Add support for dealing with decoded time structures Date: Wed, 31 Jul 2019 19:38:59 -0700 Organization: UCLA Computer Science Department Message-ID: <02976867-d320-51aa-c4cb-864831a5ac35@cs.ucla.edu> References: <20190729122247.28663.99759@vcs0.savannah.gnu.org> <20190729122257.00600207F5@vcs0.savannah.gnu.org> <87imriymhk.fsf@tcd.ie> <87mugund5x.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="69883"; 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: emacs-devel@gnu.org To: Lars Ingebrigtsen , "Basil L. Contovounesios" Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Aug 01 04:39:26 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 1ht0zx-000Hva-At for ged-emacs-devel@m.gmane.org; Thu, 01 Aug 2019 04:39:21 +0200 Original-Received: from localhost ([::1]:45582 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1ht0zw-000856-9N for ged-emacs-devel@m.gmane.org; Wed, 31 Jul 2019 22:39:20 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:48488) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1ht0zf-000850-0k for emacs-devel@gnu.org; Wed, 31 Jul 2019 22:39:03 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ht0ze-0002Tw-6F for emacs-devel@gnu.org; Wed, 31 Jul 2019 22:39:02 -0400 Original-Received: from zimbra.cs.ucla.edu ([131.179.128.68]:49542) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ht0ze-0002SJ-0X for emacs-devel@gnu.org; Wed, 31 Jul 2019 22:39:02 -0400 Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id 9C90A1626EF; Wed, 31 Jul 2019 19:39:00 -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 YELb6P9OSpXC; Wed, 31 Jul 2019 19:39:00 -0700 (PDT) Original-Received: from localhost (localhost [127.0.0.1]) by zimbra.cs.ucla.edu (Postfix) with ESMTP id ECF6E1626FE; Wed, 31 Jul 2019 19:38:59 -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 F8Nes4Qur6Kj; Wed, 31 Jul 2019 19:38:59 -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 C53651626EF; Wed, 31 Jul 2019 19:38:59 -0700 (PDT) In-Reply-To: <87mugund5x.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:239081 Archived-At: >>> +(defun date-days-in-month (year month) >>> + "The number of days in MONTH in YEAR." >>> + (if (= month 2) >>> + (if (date-leap-year-p year) >>> + 29 >>> + 28) >>> + (if (memq month '(1 3 5 7 8 10 12)) >>> + 31 >>> + 30))) >> >> Doesn't this already exist as the Gregorian calendar-last-day-of-month >> in calendar.el? > > Yes, apparently. (I didn't know about it.) The two functions are not equivalent, as date-days-in-month uses astronomical year numbering, whereas calendar-last-day-of-month uses traditional year numbering, with no year zero.