Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!inria!seti!minos!deschamp
From: deschamp@minos.inria.fr (Philippe Deschamp)
Newsgroups: comp.emacs
Subject: Re: searching for "non-printables"
Message-ID: <1521@seti.inria.fr>
Date: 24 Jul 90 11:22:41 GMT
References: <929@meaddata.mead.UUCP>
Sender: news@seti.inria.fr
Reply-To: deschamp@seti.inria.fr
Organization: INRIA Rocquencourt -- France
Lines: 20


In article <929@meaddata.mead.UUCP>, jennifer@mead.UUCP (Jennifer Lill) writes:
|> 		How  can I search for a string containing a non-printable that
|> emacs would display with a \<hex-value>?

   I use "isearch-forward-regexp" (bound to M-^S) with the appropriate
regexp: "[^^@-~]" to find characters with the 8th bit on (your
question as I understand it), "[^^I^J -~]" to find non-printable
characters (what I usually do).  As these regular expressions are fed
interactively to Emacs, you need some care to type them.  The first
regexp is obtained by typing the sequence
	[ ^ C-q C-@ - ~ ]
and the second one by
	[ ^ TAB RET SPC - ~ ]
   Of course, this only works for ASCII...

					Philippe Deschamp.
Tlx: 697033F   Fax: +33 (1) 39-63-53-30   Tel: +33 (1) 39-63-58-58
Email: deschamp@seti.inria.fr   ||   ...!inria!deschamp
Smail: INRIA, Rocquencourt, BP 105, 78153 Le Chesnay Cedex, France