Path: utzoo!utgpu!watmath!clyde!att!pacbell!ames!ncar!tank!mimsy!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn )
Newsgroups: comp.lang.c
Subject: Re: preventing sign extension
Keywords: bitmask sign extension
Message-ID: <9333@smoke.BRL.MIL>
Date: 11 Jan 89 08:13:56 GMT
References: <905@thor.stolaf.edu>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 9

In article <905@thor.stolaf.edu> edf@rocky2.rockefeller.edu writes:
>#define INTMASK	(long) ((unsigned) (0))

Almost certainly this was supposed to be
 #define INTMASK	((long)(unsigned)~0)

The form you gave should not have worked on ANY C compiler.
Are you reading that from a magazine listing?  They're
notorious for goofing up "funny" symbols like ~, `, and \.