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Message-ID: <20250606002609.GI1827@brightrain.aerifal.cx>
Date: Thu, 5 Jun 2025 20:26:09 -0400
From: Rich Felker <dalias@...c.org>
To: Andy Caldwell <andy.m.caldwell@...glemail.com>
Cc: musl@...ts.openwall.com, David Steele <david@...ackrest.org>,
noloader@...il.com
Subject: Re: Sign conversion warning in FD_ISSET()
On Fri, Jun 06, 2025 at 01:23:14AM +0100, Andy Caldwell wrote:
> > > There probably is some way to get it right with clever use of the
> > > ternary operator but I haven't come up with anything in the first few
> > > seconds thinking about it.
> > >
> > > Rich
>
> Yes, the ternary operator can be used to create a C89-compatible
> version (this allows anything coercible to an `int` or an `unsigned`,
> so it mostly only refuses pointers and structures).
>
> #define SOCKET_TO_UNSIGNED(s) ((unsigned)(1?(s):0))
Nope, that accepts a pointer. Make it 42 instead of 0. Or just 1.
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