From: Simon Wright <simon@pushface.org>
Subject: Re: GNAT 4.4.5 Record Bit_Order Endian issues
Date: Fri, 18 Jan 2013 17:19:20 +0000
Date: 2013-01-18T17:19:20+00:00 [thread overview]
Message-ID: <lyy5fqtnmv.fsf@pushface.org> (raw)
In-Reply-To: 8a7a9e6f-6f87-44a7-942b-2275a9ecf049@googlegroups.com
awdorrin <awdorrin@gmail.com> writes:
> Presumably, if the record contents can be defined in terms of a 32-bit
> machine scalar' - then this endian conversion can be done by starting
> at 'MyTrkRec'Address' and doing byte swaps on 4-byte (32-bit)
> groupings.
>
> In C I'd simply make a 'uint32_t' pointer to the record address, and
> loop through till the end of the record doing 'htonl()' calls. But Ada
> doesn't make things quite so 'easy' ;-)
Provided all your machine scalars are 32-bits. I've come across layouts
where htons() was needed (twice).
I wrote a toy to give myself some confidence about this - at
http://dl.dropbox.com/u/34783908/Ada/endianness.adb
next prev parent reply other threads:[~2013-01-18 17:19 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-14 17:43 GNAT 4.4.5 Record Bit_Order Endian issues awdorrin
2013-01-15 0:38 ` Randy Brukardt
2013-01-15 1:57 ` Adam Beneschan
2013-01-15 16:57 ` AdaMagica
2013-01-15 22:24 ` Stephen Leake
2013-01-16 10:44 ` Simon Wright
2013-01-16 19:00 ` AdaMagica
2013-01-16 21:34 ` Simon Wright
2013-01-16 23:14 ` Randy Brukardt
2013-01-17 3:49 ` Stephen Leake
2013-01-17 15:32 ` awdorrin
2013-01-18 9:49 ` Stephen Leake
2013-01-18 13:04 ` Robert A Duff
2013-01-19 1:43 ` Stephen Leake
2013-01-19 12:48 ` AdaMagica
2013-01-22 0:14 ` Randy Brukardt
2013-01-17 17:28 ` Simon Wright
2013-01-18 9:56 ` Stephen Leake
2013-01-17 18:04 ` awdorrin
2013-01-17 19:50 ` awdorrin
2013-01-18 9:58 ` Stephen Leake
2013-01-17 20:58 ` Simon Wright
2013-01-17 21:29 ` awdorrin
2013-01-17 22:16 ` awdorrin
2013-01-18 6:15 ` J-P. Rosen
2013-01-18 15:28 ` Niklas Holsti
2013-01-18 9:37 ` Stephen Leake
2013-01-18 12:24 ` awdorrin
2013-01-18 15:11 ` awdorrin
2013-01-19 1:48 ` Stephen Leake
2013-01-18 17:19 ` Simon Wright [this message]
2013-01-22 9:49 ` quinot
2013-01-28 13:39 ` quinot
-- strict thread matches above, loose matches on Subject: below --
2013-01-22 3:21 Stephen Leake
2013-01-22 5:14 ` Jeffrey Carter
2013-01-23 1:29 ` Stephen Leake
2013-01-22 22:40 ` Randy Brukardt
2013-01-23 1:38 ` Stephen Leake
2013-01-23 10:58 ` Simon Wright
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