Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!purdue!haven!umd5!adm!smoke!gwyn
From: gwyn@smoke.ARPA (Doug Gwyn )
Newsgroups: comp.std.c
Subject: Re: The offsetof macro
Message-ID: <8402@smoke.ARPA>
Date: 31 Aug 88 10:47:15 GMT
References: <16490006@hpcllca.HP.COM>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 7

In article <16490006@hpcllca.HP.COM> walter@hpcllca.HP.COM (Walter Murray) writes:
>So what is a valid way to define offsetof?

There is no portable way to #define an offsetof() macro in C.
The usual method you already know will nonetheless work on a
large number of implementations.  Others may have to use a
compiler intrinsic for this.