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Date: Fri, 5 Jun 2015 07:58:39 -0600
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To: Joe Watkins <pthreads@pthreads.org>
Cc: internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] offsetof and XtOffsetOf
From: levim@php.net (Levi Morrison)

On Thu, Jun 4, 2015 at 11:58 PM, Joe Watkins <pthreads@pthreads.org> wrote:
> Explained here: http://lxr.php.net/xref/PHP_TRUNK/main/php.h#415
>
>
> On Fri, Jun 5, 2015 at 5:06 AM, Levi Morrison <levim@php.net> wrote:
>>
>> The macro offsetof is required by the C89 standard to be defined in
>> stddef.h and remains in newer standards. The macro XtOffsetOf is
>> non-standard that is as far as I can tell a part of the X Toolkit
>> Intrinsics or Xlib.
>>
>> Does anyone know the reasons why we are using the non-standard macro
>> instead of the standard one?

Thanks, Joe. However, that code just explains why are macros are that
way. It doesn't justify the use of XtOffsetOf over offsetof, just how
the ifdefs were obtained.