From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Subject: Re: What is the warning about builtin-function on gcc-4.6.0 ?
Date: Sun, 27 Mar 2011 11:50:45 +0200
Date: 2011-03-27T11:50:42+02:00 [thread overview]
Message-ID: <vowz6vdvzwfq$.t1jee5bsoi5i.dlg@40tude.net> (raw)
In-Reply-To: 5e721fd6-ee2c-4754-b09a-4a3b9c601bf3@l2g2000prg.googlegroups.com
On Sat, 26 Mar 2011 14:36:04 -0700 (PDT), ytomino wrote:
> On Mar 27, 12:14�am, "Dmitry A. Kazakov" <mail...@dmitry-kazakov.de>
> wrote:
>> When interfacing C, one IMO should always add a range or validity check
>> when taking floating-point values from C, to prevent non-numbers leaking
>> out. Unfortunately it is a lot of work, so no Ada bindings actually follows
>> this rule.
>
> uh, there are functions (from C) that return infinity/NaN
> intentionally, too.
When a numeric function returns garbage it is useless. When non-numbers are
supposed to serve error indication, they must be converted to an exception,
e.g. Constraint_Error. Which is the whole point. In my view a C binding
should check the result for mess and raise an exception if necessary.
--
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de
next prev parent reply other threads:[~2011-03-27 9:50 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-26 6:32 What is the warning about builtin-function on gcc-4.6.0 ? ytomino
2011-03-26 8:45 ` Florian Weimer
2011-03-26 9:13 ` ytomino
2011-03-26 9:43 ` Florian Weimer
2011-03-26 10:07 ` ytomino
2011-03-26 10:24 ` Florian Weimer
2011-03-26 15:14 ` Dmitry A. Kazakov
2011-03-26 21:36 ` ytomino
2011-03-27 9:50 ` Dmitry A. Kazakov [this message]
2011-03-26 14:50 ` Simon Wright
2011-03-26 15:50 ` Florian Weimer
2011-03-26 16:32 ` Simon Wright
2011-03-26 17:02 ` Florian Weimer
2011-03-26 17:48 ` Simon Wright
2011-03-26 18:48 ` Florian Weimer
2011-03-27 2:08 ` Randy Brukardt
2011-03-27 8:37 ` Florian Weimer
2011-03-27 16:41 ` Robert A Duff
2011-03-27 17:21 ` Florian Weimer
2011-03-27 17:56 ` Robert A Duff
2011-03-27 16:51 ` Robert A Duff
2011-03-27 17:05 ` Florian Weimer
2011-03-27 17:14 ` Robert A Duff
2011-03-29 2:20 ` Randy Brukardt
2011-03-29 18:35 ` Robert A Duff
2011-03-29 23:35 ` Randy Brukardt
2011-03-30 1:02 ` Adam Beneschan
2011-03-30 12:57 ` Robert A Duff
2011-03-30 14:41 ` Adam Beneschan
2011-03-30 18:39 ` Robert A Duff
2011-03-30 19:28 ` Randy Brukardt
2011-03-26 21:58 ` ytomino
2011-03-26 22:00 ` Florian Weimer
2011-03-26 22:22 ` anon
2011-03-26 22:36 ` ytomino
2011-03-27 12:00 ` anon
2011-03-27 18:50 ` ytomino
2011-03-27 23:35 ` anon
2011-03-27 23:42 ` anon
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