From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Type-error in C code Date: Fri, 12 Nov 2010 17:48:14 +0200 Message-ID: <83oc9uee69.fsf@gnu.org> References: <4CDD5951.4030904@swipnet.se> Reply-To: Eli Zaretskii NNTP-Posting-Host: lo.gmane.org X-Trace: dough.gmane.org 1289577031 5829 80.91.229.12 (12 Nov 2010 15:50:31 GMT) X-Complaints-To: usenet@dough.gmane.org NNTP-Posting-Date: Fri, 12 Nov 2010 15:50:31 +0000 (UTC) Cc: jan.h.d@swipnet.se, monnier@iro.umontreal.ca, emacs-devel@gnu.org To: Julien Danjou Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Fri Nov 12 16:50:26 2010 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1PGvtQ-0008Kp-CJ for ged-emacs-devel@m.gmane.org; Fri, 12 Nov 2010 16:50:24 +0100 Original-Received: from localhost ([127.0.0.1]:59683 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PGvtO-0000SA-TB for ged-emacs-devel@m.gmane.org; Fri, 12 Nov 2010 10:50:23 -0500 Original-Received: from [140.186.70.92] (port=45044 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PGvrM-0007Ip-Ix for emacs-devel@gnu.org; Fri, 12 Nov 2010 10:48:18 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PGvrI-0002AD-GO for emacs-devel@gnu.org; Fri, 12 Nov 2010 10:48:13 -0500 Original-Received: from mtaout20.012.net.il ([80.179.55.166]:51335) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PGvrI-00029g-98 for emacs-devel@gnu.org; Fri, 12 Nov 2010 10:48:12 -0500 Original-Received: from conversion-daemon.a-mtaout20.012.net.il by a-mtaout20.012.net.il (HyperSendmail v2007.08) id <0LBS005003TYVQ00@a-mtaout20.012.net.il> for emacs-devel@gnu.org; Fri, 12 Nov 2010 17:48:10 +0200 (IST) Original-Received: from HOME-C4E4A596F7 ([77.126.249.126]) by a-mtaout20.012.net.il (HyperSendmail v2007.08) with ESMTPA id <0LBS004683W92GI0@a-mtaout20.012.net.il>; Fri, 12 Nov 2010 17:48:10 +0200 (IST) In-reply-to: X-012-Sender: halo1@inter.net.il X-detected-operating-system: by eggs.gnu.org: Solaris 10 (beta) X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:132579 Archived-At: > From: Julien Danjou > Date: Fri, 12 Nov 2010 16:32:10 +0100 > Cc: Stefan Monnier , emacs-devel@gnu.org > > It seems we can store 32 bits unsigned using XSETFASTINT. No. > for (iter = data; CONSP (iter); iter = XCDR (iter)) > { > Lisp_Object o = XCAR (iter); > > if (INTEGERP (o)) > val = (long) XFASTINT (o); > --8<---------------cut here---------------end--------------->8--- > > So IIUC, we could use XSETFASTINT to store the atom. Am I wrong? Yes, you are wrong. You should only use XSETFASTINT if you know the value will not overflow a Lisp integer. In a nutshell, nothing can work around the basic limitation that only integer values smaller or equal to most-positive-fixnum can be put into a Lisp integer.