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From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: comp.lang.c
Subject: Re: structure enhancements
Message-ID: <6579@brl-smoke.ARPA>
Date: Mon, 19-Oct-87 08:33:49 EDT
Article-I.D.: brl-smok.6579
Posted: Mon Oct 19 08:33:49 1987
Date-Received: Tue, 20-Oct-87 02:06:46 EDT
References: <112@teletron.UUCP> <11225@orchid.waterloo.edu>
Reply-To: gwyn@brl.arpa (Doug Gwyn (VLD/VMB) <gwyn>)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 8
Keywords: structure comparison

In article <11225@orchid.waterloo.edu> datanguay@watbun.waterloo.edu (David Tanguay) writes:
>What do you do with unions?
>Otherwise, you could use memcmp().

No, except for a few fortunate implementations.  Structs may contain
"holes" with indeterminate contents.  Serial byte-wise comparison
does not work right for most floating-point formats nor for integers
on a little-endian architecture.