Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/5/84; site reed.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!vax135!cornell!uw-beaver!tektronix!reed!alexis
From: alexis@reed.UUCP (Alexis Dimitriadis)
Newsgroups: net.lang.c
Subject: Re: NULL ROUTINE POINTERS
Message-ID: <2217@reed.UUCP>
Date: Mon, 2-Dec-85 03:10:33 EST
Article-I.D.: reed.2217
Posted: Mon Dec  2 03:10:33 1985
Date-Received: Tue, 3-Dec-85 20:17:43 EST
References: <139@brl-tgr.ARPA>
Reply-To: alexis@reed.UUCP (Alexis Dimitriadis)
Organization: Reed College, Portland, Oregon
Lines: 22
Summary: 

> After all the talk about null object pointers on machines with non-zero
> null addresses, how would you portably define a null routine pointer?:
Remember cdecl??  It says:
-----------
% cdecl
cast NULL into pointer to function returning short
(short (*)())NULL
-----------
so:
#define		NULLROUTINE		((short (*)()) 0 )

will do fine.  Remember, NULL _is_ 0, even on machines where (byte
pattern) zero is a valid address!!

Alexis Dimitriadis
-- 
_______________________________________________
Any opinions expressed above have been grown organically and contain
no preservatives or artificial sweeteners.

				alexis @ reed
    {decvax,ihnp4,ucbcad,uw-beaver}!tektronix!reed.UUCP