From: "Warren W. Gay VE3WWG" <ve3wwg@cogeco.ca>
Subject: Re: Ada compiler differences
Date: Wed, 20 Oct 2004 12:48:30 -0400
Date: 2004-10-20T12:48:30-04:00 [thread overview]
Message-ID: <YDwdd.53169$JG5.650210@news20.bellglobal.com> (raw)
In-Reply-To: <bRedd.9$ye4.6@dfw-service2.ext.ray.com>
Mark H Johnson wrote:
> Larry Kilgallen wrote:
>> In article <WSWcd.8$V_2.4@dfw-service2.ext.ray.com>, Mark H Johnson
>> <mark_h_johnson@raytheon.com> writes:
>>
>> [snip big endian TCP/IP example]
>
>
>>> That particular issue has nothing to do with Ada; you have the same
>>> problem with C or other languages.
>>
>> In particular, it has to do with the fact that TCP/IP was devised on
>> an ad-hoc basis rather than using an underlying marshalling technique
>> such as promoted by ASN.1.
The marshalling technique required by ASN.1 requires that all hosts
do "marshalling", whereas big endian machines do not require it
at all (assuming size matches). ASN.1 is just a different representation.
So in addition to Mark's point below, I fail to see why this is
important here.
> I am not quite sure how this comment is relevant to the OP's question on
> writing portable software. Are you suggesting to the OP that they use
> something like an ASN.1 library instead of Posix functions? If so, how
> is that "better" for the problem I described?
>
> --Mark
--
Warren W. Gay VE3WWG
http://home.cogeco.ca/~ve3wwg
next prev parent reply other threads:[~2004-10-20 16:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-18 12:47 Ada compiler differences Magnus
2004-10-18 14:01 ` Jacob Sparre Andersen
2004-10-18 18:31 ` Luke A. Guest
2004-10-18 19:55 ` Nick Roberts
2004-10-19 20:52 ` Luke A. Guest
2004-10-20 1:16 ` Jeffrey Carter
2004-10-18 21:03 ` Martin Dowie
2004-10-19 2:11 ` Jeffrey Carter
2004-10-18 20:36 ` Nick Roberts
2004-10-18 21:48 ` Mark H Johnson
2004-10-19 14:49 ` Larry Kilgallen
2004-10-19 20:32 ` Mark H Johnson
2004-10-20 16:48 ` Warren W. Gay VE3WWG [this message]
2004-10-21 13:54 ` Larry Kilgallen
2004-10-21 20:57 ` Warren W. Gay VE3WWG
2004-10-21 21:05 ` Mark H Johnson
2004-10-26 15:23 ` Larry Kilgallen
2004-10-26 21:21 ` Mark H Johnson
2004-10-27 4:39 ` Larry Kilgallen
2004-10-27 13:49 ` Mark H Johnson
2004-10-20 8:02 ` Rod Chapman
2004-10-21 13:55 ` Larry Kilgallen
2004-10-22 8:13 ` Rod Chapman
-- strict thread matches above, loose matches on Subject: below --
2004-10-20 1:32 Stephen Leake
2004-10-20 5:47 ` Simon Wright
2004-10-26 0:28 ` Randy Brukardt
2004-10-20 13:05 Stephen Leake
2004-10-20 17:17 ` Nick Roberts
2004-10-20 19:44 ` Simon Wright
2004-10-21 21:02 ` Nick Roberts
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