From: Paul Eggert <eggert@cs.ucla.edu>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: Eli Zaretskii <eliz@gnu.org>, Emacs Development <emacs-devel@gnu.org>
Subject: Re: HAVE_FTIME, src/m/vax.h, and src/m in general
Date: Sun, 20 May 2012 20:06:07 -0700 [thread overview]
Message-ID: <4FB9B11F.8070205@cs.ucla.edu> (raw)
In-Reply-To: <jwv62bqxpuh.fsf-monnier+emacs@gnu.org>
On 05/20/2012 06:54 PM, Stefan Monnier wrote:
> Why use
>
> #define BITS_PER_SHORT BITS_OF_SIGNED_MAX (SHRT_MAX)
>
> rather than
>
> #define BITS_PER_SHORT (CHAR_BIT * sizeof (short))
Mainly because sizeof does not work in '#if', and these
macros must work in '#if'. Or at least some of them must
do so, and we might as well have them all work.
There's a brief comment to this effect in the description of
BITS_OF_SIGNED_MAX.
next prev parent reply other threads:[~2012-05-21 3:06 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-19 9:01 HAVE_FTIME, src/m/vax.h, and src/m in general Paul Eggert
2012-05-19 12:36 ` Eli Zaretskii
2012-05-19 18:53 ` Stefan Monnier
2012-05-20 18:19 ` Paul Eggert
2012-05-21 1:54 ` Stefan Monnier
2012-05-21 3:06 ` Paul Eggert [this message]
2012-05-21 15:53 ` Stefan Monnier
2012-05-22 7:08 ` bug#11538: Decommissioning src/m Paul Eggert
2012-05-22 12:48 ` Stefan Monnier
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