From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: YAMAMOTO Mitsuharu Newsgroups: gmane.emacs.devel Subject: Re: Willing to debug bug #3542 (23.0.94; File access via UNC path slow again under Windows) Date: Tue, 14 Jul 2009 09:31:42 +0900 Organization: Faculty of Science, Chiba University Message-ID: References: <7dbe73ed0907051401o26903ca3t9a67060f3a3417ad@mail.gmail.com> <83fxda1pef.fsf@gnu.org> <7dbe73ed0907060038w53699f77ie742996955ae8118@mail.gmail.com> <838wj11sz4.fsf@gnu.org> <83my7fz09s.fsf@gnu.org> <7dbe73ed0907081347q12dfd1a2lbbff915c49362f75@mail.gmail.com> <4A55D68D.8050407@gnu.org> <7dbe73ed0907090453s3e125b4ar142b90a268b105e2@mail.gmail.com> <7DAFC004A33C486A9E29A59689E7F02E@us.oracle.com> <4A5619F5.8010008@gnu.org> <8363e1zoak.fsf@gnu.org> <83hbxjrmue.fsf@gnu.org> <83ws6cqudb.fsf@gnu.org> <83tz1gqr33.fsf@gnu.org> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII X-Trace: ger.gmane.org 1247531538 26912 80.91.229.12 (14 Jul 2009 00:32:18 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Tue, 14 Jul 2009 00:32:18 +0000 (UTC) Cc: Andreas Schwab , emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Jul 14 02:32:11 2009 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 4.50) id 1MQVwD-00011H-NY for ged-emacs-devel@m.gmane.org; Tue, 14 Jul 2009 02:32:06 +0200 Original-Received: from localhost ([127.0.0.1]:35552 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MQVwD-0006tq-0m for ged-emacs-devel@m.gmane.org; Mon, 13 Jul 2009 20:32:05 -0400 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1MQVw4-0006p7-Ca for emacs-devel@gnu.org; Mon, 13 Jul 2009 20:31:56 -0400 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1MQVvz-0006gU-GY for emacs-devel@gnu.org; Mon, 13 Jul 2009 20:31:55 -0400 Original-Received: from [199.232.76.173] (port=45509 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1MQVvz-0006gL-BS for emacs-devel@gnu.org; Mon, 13 Jul 2009 20:31:51 -0400 Original-Received: from ntp.math.s.chiba-u.ac.jp ([133.82.132.2]:61775 helo=mathmail.math.s.chiba-u.ac.jp) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1MQVvw-0005Ub-G1; Mon, 13 Jul 2009 20:31:49 -0400 Original-Received: from church.math.s.chiba-u.ac.jp (church [133.82.132.36]) by mathmail.math.s.chiba-u.ac.jp (Postfix) with ESMTP id B252A2C4B; Tue, 14 Jul 2009 09:31:42 +0900 (JST) In-Reply-To: <83tz1gqr33.fsf@gnu.org> User-Agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.8 (=?ISO-8859-4?Q?Shij=F2?=) APEL/10.6 Emacs/22.3 (sparc-sun-solaris2.8) MULE/5.0 (SAKAKI) X-detected-operating-system: by monty-python.gnu.org: NetBSD 3.0 (DF) 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:112432 Archived-At: >>>>> On Mon, 13 Jul 2009 23:13:20 +0300, Eli Zaretskii said: > Aha. But it sounds like it's not just me who is confused. Here's > just two examples: > From fileio.c: > nm = (unsigned char *) alloca (SBYTES (filename) + 1); > bcopy (SDATA (filename), nm, SBYTES (filename) + 1); > (why +1? it potentially accesses memory beyond end of `filename's > contents) It is necessary because SBYTES does not count the extra NUL character. E.g., SBYTES (empty_unibyte_string) == 0, and *(SDATA (empty_unibyte_string)) == '\0'. YAMAMOTO Mitsuharu mituharu@math.s.chiba-u.ac.jp