From mboxrd@z Thu Jan  1 00:00:00 1970
Path: main.gmane.org!not-for-mail
From: "Eli Zaretskii" <eliz@is.elta.co.il>
Newsgroups: gmane.emacs.help
Subject: Re: Reading portions of large files
Date: Fri, 10 Jan 2003 22:21:05 +0300
Sender: help-gnu-emacs-bounces+gnu-help-gnu-emacs=m.gmane.org@gnu.org
Message-ID: <2561-Fri10Jan2003222104+0200-eliz@is.elta.co.il>
References: <mailman.100.1042135372.21513.help-gnu-emacs@gnu.org>
	<x5heci423t.fsf@lola.goethe.zz>
Reply-To: Eli Zaretskii <eliz@is.elta.co.il>
NNTP-Posting-Host: main.gmane.org
X-Trace: main.gmane.org 1042230394 25320 80.91.224.249 (10 Jan 2003 20:26:34 GMT)
X-Complaints-To: usenet@main.gmane.org
NNTP-Posting-Date: Fri, 10 Jan 2003 20:26:34 +0000 (UTC)
Return-path: <help-gnu-emacs-bounces+gnu-help-gnu-emacs=m.gmane.org@gnu.org>
Original-Received: from monty-python.gnu.org ([199.232.76.173])
	by main.gmane.org with esmtp (Exim 3.35 #1 (Debian))
	id 18X5jD-0006Z6-00
	for <gnu-help-gnu-emacs@m.gmane.org>; Fri, 10 Jan 2003 21:26:07 +0100
Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org)
	by monty-python.gnu.org with esmtp (Exim 4.10.13)
	id 18X5ig-0007VJ-02
	for gnu-help-gnu-emacs@m.gmane.org; Fri, 10 Jan 2003 15:25:34 -0500
Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.10.13)
	id 18X5hy-0006fL-00
	for help-gnu-emacs@gnu.org; Fri, 10 Jan 2003 15:24:50 -0500
Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.10.13)
	id 18X5hU-0005a3-00
	for help-gnu-emacs@gnu.org; Fri, 10 Jan 2003 15:24:21 -0500
Original-Received: from aragorn.inter.net.il ([192.114.186.23])
	by monty-python.gnu.org with esmtp (Exim 4.10.13)
	id 18X5hI-00057F-00
	for help-gnu-emacs@gnu.org; Fri, 10 Jan 2003 15:24:08 -0500
Original-Received: from zaretsky ([80.230.85.156])
	by aragorn.inter.net.il (Mirapoint Messaging Server MOS 3.2.1-GA)
	with ESMTP id ACK66529;
	Fri, 10 Jan 2003 22:24:02 +0200 (IST)
Original-To: help-gnu-emacs@gnu.org
X-Mailer: emacs 21.3.50 (via feedmail 8 I) and Blat ver 1.8.9
In-reply-to: <x5heci423t.fsf@lola.goethe.zz> (message from David Kastrup on 09
	Jan 2003 19:20:06 +0100)
X-BeenThere: help-gnu-emacs@gnu.org
X-Mailman-Version: 2.1b5
Precedence: list
List-Id: Users list for the GNU Emacs text editor <help-gnu-emacs.gnu.org>
List-Help: <mailto:help-gnu-emacs-request@gnu.org?subject=help>
List-Post: <mailto:help-gnu-emacs@gnu.org>
List-Subscribe: <http://mail.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=subscribe>
List-Archive: <http://mail.gnu.org/pipermail/help-gnu-emacs>
List-Unsubscribe: <http://mail.gnu.org/mailman/listinfo/help-gnu-emacs>,
	<mailto:help-gnu-emacs-request@gnu.org?subject=unsubscribe>
Errors-To: help-gnu-emacs-bounces+gnu-help-gnu-emacs=m.gmane.org@gnu.org
Xref: main.gmane.org gmane.emacs.help:5338
X-Report-Spam: http://spam.gmane.org/gmane.emacs.help:5338

> From: David Kastrup <dak@gnu.org>
> Newsgroups: gnu.emacs.help
> Date: 09 Jan 2003 19:20:06 +0100
> 
> > I have very large files, sometimes over 1G, from which I would like to edit
> > very small portions, the headers or trailers for example.  Emacs won't open
> > those files, it complains about them being too big.  Is it possible to
> > edit, and save back after editing, only small portions of such files.
> 
> insert-file-contents is a built-in function.
> (insert-file-contents FILENAME &optional VISIT BEG END REPLACE)

I don't think this will help the OP, since BEG and END need to be
representable as Lisp integers, so they still are subject to the same
128-MB limit.