Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!godot!ima!ISM780!ed From: ed@ISM780.UUCP Newsgroups: net.lang.c Subject: Re: How does one construct a mask for th Message-ID: <151@ISM780.UUCP> Date: Thu, 7-Mar-85 00:23:49 EST Article-I.D.: ISM780.151 Posted: Thu Mar 7 00:23:49 1985 Date-Received: Fri, 8-Mar-85 03:28:36 EST Lines: 14 Nf-ID: #R:brl-tgr:-884900:ISM780:30000003:000:280 Nf-From: ISM780!ed Mar 5 18:19:00 1985 > #define MSB (~(-1>>1)) > > Steve Ludlum, decvax!yale-co!ima!stevel, {cca!ihnp4!cbosgd}!ima!stevel I think you need #define MSB (~((unsigned)-1>>1)) Right shift is only guaranteed to fill by zeroes if the left operand is unsigned. Ed Lycklama decvax!cca!ima!ism780!ed