From: Tommy Nordgren <tommy.nordgren@comhem.se>
To: Aleksej Saushev <asau@hotbox.ru>
Cc: Brian Gough <bjg@network-theory.co.uk>, gsl-discuss@sourceware.org
Subject: Re: test release gsl-1.9.90.tar.gz
Date: Thu, 13 Sep 2007 09:42:00 -0000 [thread overview]
Message-ID: <2DCC14D9-DF33-44C1-9244-D62994CBC5AA@comhem.se> (raw)
In-Reply-To: <87abrryotz.fsf@hotbox.ru>
On 13 sep 2007, at 10.03, Aleksej Saushev wrote:
> Tommy Nordgren <tommy.nordgren@comhem.se> writes:
>
>>> FAIL: gsl_isinf(-inf) (1 observed vs -1 expected) [112]
>>> FAIL: test
>
>> The following alternate patch will fix the test failure,
>> without modifying the test cases.
>> --- /Users/emac/Desktop/infnan.c 2007-09-12
>> 22:37:19.000000000 +0200
>> +++ /Softsys/gsl-1.9.90/sys/infnan.c 2007-09-12
>> 22:44:30.000000000 +0200
>> @@ -118,7 +118,11 @@
>> int
>> gsl_isinf (const double x)
>> {
>> - return isinf(x);
>> + int result = isinf(x);
>> + if (result > 0 && x < 0) {
>> + result = - result;
>> + }
>> + return result;
>> }
>> # else
>> Note: the one on the desktop is the unmodified file.
>> Also, with make -k check all other test cases pass.
>
> As for me, I don't like the proposal.
>
> It is clear, that the test case is wrong, since in C truth is
> denoted by "1", and not by "-1". This is more convenient from
> scientist's point of view too.
>
> If you really want to fix test code, you'd better make it deal
> with standard semantic:
>
> The isinf() macro returns a non-zero value if the value of x
> is an infinity. Otherwise 0 is returned.
>
> Obviously, test code doesn't behave well, when isinf returns
> 12345 as its value.
It's still necessary to fix 'isfnan.c' somewhere though. There are
two alternative
conditionally compiled versions of gsl_isinf.
Here is an alternate fix, that will pass your updated test case,
when isinf is not defined on the system.
--- /Users/emac/Desktop/infnan.c 2007-09-13 11:33:25.000000000
+0200
+++ /Softsys/gsl-1.9.90/sys/infnan.c 2007-09-13 11:34:57.000000000
+0200
@@ -127,7 +127,7 @@
{
if (! gsl_finite(x) && ! gsl_isnan(x))
{
- return (x > 0 ? +1 : -1);
+ return 1;
}
else
{
------
What is a woman that you forsake her, and the hearth fire and the
home acre,
to go with the old grey Widow Maker. --Kipling, harp song of the
Dane women
Tommy Nordgren
tommy.nordgren@comhem.se
next prev parent reply other threads:[~2007-09-13 9:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-11 9:19 Brian Gough
2007-09-11 18:39 ` Patrick Alken
2007-09-12 17:04 ` Brian Gough
2007-09-13 13:45 ` Brian Gough
2007-09-13 16:30 ` Patrick Alken
2007-09-13 19:34 ` Brian Gough
2007-09-12 8:21 ` Aleksej Saushev
2007-09-12 8:48 ` Brian Gough
2007-09-12 20:12 ` Jari Häkkinen
2007-09-12 21:02 ` Tommy Nordgren
2007-09-12 21:03 ` Tommy Nordgren
2007-09-13 8:12 ` Aleksej Saushev
2007-09-13 9:42 ` Tommy Nordgren [this message]
2007-09-12 21:16 ` Oliver Jennrich
2007-09-13 12:42 ` Brian Gough
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