From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Helmut Eller Newsgroups: gmane.emacs.devel Subject: Re: Using the GNU GMP Library for Bignums in Emacs Date: Thu, 03 May 2018 20:51:43 +0200 Message-ID: References: <29f933ac-a6bf-8742-66a7-0a9d6d3e5a88@disroot.org> <0d3175d8-d996-651e-b221-71978bde3a65@cs.ucla.edu> <42cbc5ab-2f02-4aa5-4b19-7b2357f91692@cs.ucla.edu> <1f58acbf-a7d8-bf4e-3d0e-a285515a22e6@cs.ucla.edu> <2549728d-8e40-b46a-009e-07cef0c24208@cs.ucla.edu> <63fdd138-77d3-89b9-aa69-490300f588a9@cs.ucla.edu> <838t90pr2l.fsf@gnu.org> NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: text/plain X-Trace: blaine.gmane.org 1525373401 16117 195.159.176.226 (3 May 2018 18:50:01 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Thu, 3 May 2018 18:50:01 +0000 (UTC) User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.50 (gnu/linux) Cc: Eli Zaretskii , eggert@cs.ucla.edu, rms@gnu.org To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu May 03 20:49:56 2018 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1fEJIi-000463-AM for ged-emacs-devel@m.gmane.org; Thu, 03 May 2018 20:49:56 +0200 Original-Received: from localhost ([::1]:58341 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fEJKp-0008Tm-5y for ged-emacs-devel@m.gmane.org; Thu, 03 May 2018 14:52:07 -0400 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:35921) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fEJKg-0008Sy-Kf for emacs-devel@gnu.org; Thu, 03 May 2018 14:51:59 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fEJKd-0000E5-Iv for emacs-devel@gnu.org; Thu, 03 May 2018 14:51:58 -0400 Original-Received: from [195.159.176.226] (port=41729 helo=blaine.gmane.org) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1fEJKd-0000Di-Cn for emacs-devel@gnu.org; Thu, 03 May 2018 14:51:55 -0400 Original-Received: from list by blaine.gmane.org with local (Exim 4.84_2) (envelope-from ) id 1fEJIT-0003pD-SZ for emacs-devel@gnu.org; Thu, 03 May 2018 20:49:41 +0200 X-Injected-Via-Gmane: http://gmane.org/ Original-Lines: 13 Original-X-Complaints-To: usenet@blaine.gmane.org Cancel-Lock: sha1:RE/3p2Vo5QOy8Gv1Rla/pO1MuNM= X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 195.159.176.226 X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 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:225054 Archived-At: On Thu, May 03 2018, Eli Zaretskii wrote: >> (format "%016x" (lognot 257)) => "3ffffffffffffefe" >> >> but the 16-hex-digit string should be "fffffffffffffefe". > > But a 16-hex-digit fffffffffffffefe is not a fixnum, right? Well, (lognot 257) is fixnum. And if we explicity specify the length, then the 16-hex-digit string "fffffffffffffefe" represents the same fixnum as the 4-hex-digit string "fefe". Helmut