From: erik quanstrom <quanstro@labs.coraid.com>
To: 9fans@9fans.net
Subject: Re: [9fans] compiler bug?
Date: Wed, 27 Nov 2013 16:35:34 -0500 [thread overview]
Message-ID: <c4e2d495da0dcd5dc6caef42a4e272f1@coraid.com> (raw)
In-Reply-To: <CAOw7k5jFUC0ZngWyupfOd74OZ2oQVor6o9-ZS23zeVhh7Aj5FA@mail.gmail.com>
> actually, even a union won't help you here: "When a value is stored in
> a member of an object of union type, the bytes of the object
> representation that do not correspond to that member but do correspond
> to other members take unspecified values."
in the example, don't all the bytes of i correspond to a byte to u,
and thus can't take on unspecified values?
or have i read that incorrectly? if i have, then FPdbleword is wrong,
and all the code that uses it needs fixing.
> Really, the way to do this particular operation portably is to write
> it portably, and extract and rearrange the bytes.
this certainly is the winning way to do this. clearer and there's
no argument as to correctness.
- erik
next prev parent reply other threads:[~2013-11-27 21:35 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-27 16:03 Steve Simon
2013-11-27 16:31 ` erik quanstrom
2013-11-27 18:07 ` Skip Tavakkolian
2013-11-27 18:38 ` erik quanstrom
2013-11-27 19:24 ` Skip Tavakkolian
2013-11-27 20:34 ` Bakul Shah
2013-11-27 21:18 ` erik quanstrom
2013-11-27 21:29 ` Charles Forsyth
2013-11-27 21:35 ` erik quanstrom [this message]
2013-11-27 21:42 ` Charles Forsyth
2013-11-27 20:41 ` Steve Simon
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