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[Bug-gsl] [bug #24489] gsl_isinf returns +1 for -inf


From: Brian Gough
Subject: [Bug-gsl] [bug #24489] gsl_isinf returns +1 for -inf
Date: Wed, 08 Oct 2008 18:35:54 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.16) Gecko/20080716 Fedora/false StumbleUpon/1.73 SeaMonkey/1.1.11

URL:
  <http://savannah.gnu.org/bugs/?24489>

                 Summary: gsl_isinf returns +1 for -inf
                 Project: GNU Scientific Library
            Submitted by: bjg
            Submitted on: Wed 08 Oct 2008 07:35:51 PM BST
                Category: Runtime error
                Severity: 3 - Normal
        Operating System: 
                  Status: Confirmed
             Assigned to: None
             Open/Closed: Open
                 Release: 1.11
         Discussion Lock: Any

    _______________________________________________________

Details:

[ if system isinf returns +1 for -inf we should override it, we used to do
this] 

From: Jerome BENOIT <address@hidden>
To: Help GSL <address@hidden>
Cc: 
Subject: [Help-gsl] gsl_isinf
Date: Wed, 08 Oct 2008 17:51:39 +0800

Hello List,

I have just noticed a weird behaviour for gsl_isinf (GSL 1.11):

gsl_isinf(GSL_NEGINF) give -1 (as expected) on some of my computers,
whereas it gives +1 on others: my computer are amd64 Debian boxes (Etch based
and Lenny): 
Amazingly, it seems that this feature is not well tested.

hth,
Jerome 

-- 
Jerome BENOIT
jgmbenoit_at_mailsnare_dot_net





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