From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 5525 invoked by alias); 9 Apr 2007 14:17:10 -0000 Received: (qmail 5479 invoked by uid 22791); 9 Apr 2007 14:17:10 -0000 X-Spam-Check-By: sourceware.org Received: from mx2.suse.de (HELO mx2.suse.de) (195.135.220.15) by sourceware.org (qpsmtpd/0.31) with ESMTP; Mon, 09 Apr 2007 15:17:02 +0100 Received: from Relay2.suse.de (mail2.suse.de [195.135.221.8]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx2.suse.de (Postfix) with ESMTP id 4F2EA215DE; Mon, 9 Apr 2007 16:17:00 +0200 (CEST) From: Andreas Schwab To: DJ Delorie Cc: gdb-patches@sourceware.org Subject: Re: Patch for isdigit/isalpha/etc. macro arguments References: <200704091342.l39DgoX1013027@greed.delorie.com> X-Yow: Where's th' DAFFY DUCK EXHIBIT?? Date: Mon, 09 Apr 2007 14:17:00 -0000 In-Reply-To: <200704091342.l39DgoX1013027@greed.delorie.com> (DJ Delorie's message of "Mon, 9 Apr 2007 09:42:50 -0400") Message-ID: User-Agent: Gnus/5.110006 (No Gnus v0.6) Emacs/22.0.97 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-IsSubscribed: yes Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org X-SW-Source: 2007-04/txt/msg00069.txt.bz2 DJ Delorie writes: >> The value of '\377' is implementation-defined. > > Not in the context of fgetc or (the places where ambiguity The context does not matter. The value of an expression is independent of its context. > In the case of casts from char* strings, the programmer should: > > isalpha((int)(unsigned char)(*s)) That's my very point. > The cast to int may be optional. It is. Andreas. -- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different."