Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site brl-tgr.ARPA
Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!panda!talcott!harvard!seismo!brl-tgr!tgr!Purtill@MIT-MULTICS.ARPA
From: Purtill@MIT-MULTICS.ARPA (Mark Purtill)
Newsgroups: net.lang.c
Subject: CTRL(X) in ANSI standard
Message-ID: <10425@brl-tgr.ARPA>
Date: Fri, 3-May-85 18:30:09 EDT
Article-I.D.: brl-tgr.10425
Posted: Fri May  3 18:30:09 1985
Date-Received: Sun, 5-May-85 23:55:19 EDT
Sender: news@brl-tgr.ARPA
Lines: 21

<Fnord>
Re: mod.std.c, various.

#define CTRL(XX) ( ($XX)[0] & '\037') 

works (I think) in ANSI C.  (For those of you who've forgotten, this
replaces 

#define CTRL(XX) 'XX' & '\037'

I.e., it converts CTRL(A) to '\001', CTRL(B) to '\002' and so forth,
possibly even doing CTRL([) et. al.  (Not having a copy of the ANSI
standard, I'm not sure.)

(Nb: I've tried to post this twice to cbosgd!std-c@BERKELEY.ARPA, but it
has disapeared without a trace both times.  Hence, I'm posting it to
INFO-C.)

       Mark
^.-.^  Purtill at MIT-MULTICS.ARPA    **Insert favorite disclaimer here**
(("))  2-032 MIT Cambrige MA 02139