[omniORB] Is there a problem with omniORBpy 2.0 and Fixed types?

Wed Mar 26 16:03:02 2003

I think this was mentioned not too long ago.  It's not a problem with
subtraction.  The expression in the assertion is missing an '='.  Line 767
should be

  OMNIORB_ASSERT(bi == b.fixed_digits());

That said, I haven't personally applied and tested this fix.  None of my
IDL uses fixed type.  Seeing a single '=' in an assertion is definitely a
problem though since assertions should not have side effects.  Try the
above and see if it fixes the problem.

Kendall

                      cp@sophos.com                                                                                                          
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                                                         Subject:  [omniORB] Is there a problem with omniORBpy 2.0 and Fixed types?          

                      03/26/2003 09:03 AM                                                                                                    

I have been learning IDL (as I am reasonably new to CORBA), and have been
dabbling with Fixed Types. During my investigations, using the examples in
Fintan's Pure CORBA book as a guide, I stumbled across a problem doing
simple arithmetic with fixed types.

Here is some example code that demonstrates the problem:

--- The IDL for my fixed type ---

#ifndef __FIXEDTYPE_IDL__
#define __FIXEDTYPE_IDL__

module FixedTypeError {
    typedef fixed<31,2> BigMoney;
};

#endif

---

--- The Python module to test my fixed type ---

import FixedTypeError

'''
The code in this module generates the following assertion:

    omniORB: Assertion failed.  This indicates a bug in the application
using
    omniORB, or maybe in omniORB itself. e.g. using the ORB after it has
    been shut down.
     file: corbaFixed.cc
     line: 767
     info: bi = b.fixed_digits()

    This application has requested the Runtime to terminate it in an
unusual way.
    Please contact the application's support team for more information.

'''

print FixedTypeError.BigMoney("0") - FixedTypeError.BigMoney("0")
print FixedTypeError.BigMoney("0") - FixedTypeError.BigMoney("1") #
Assertion generated here
print FixedTypeError.BigMoney("1") - FixedTypeError.BigMoney("0") # ...and
here
print FixedTypeError.BigMoney("1") - FixedTypeError.BigMoney("1")
print FixedTypeError.BigMoney("0") + FixedTypeError.BigMoney("0")
print FixedTypeError.BigMoney("0") + FixedTypeError.BigMoney("1")
print FixedTypeError.BigMoney("1") + FixedTypeError.BigMoney("0")
print FixedTypeError.BigMoney("1") + FixedTypeError.BigMoney("1")

---

It looks like there is some problem with subtraction with a zero on one
side and a non-zero on the other.

This is not a critical problem for me as I am not relying on fixed type
arithmetic at the moment, but I thought you might like the feedback.

Cliff

--
Cliff Penton, Head of Software Architecture & Research, Sophos Anti-Virus
Email: cp@sophos.com, DDI: 01235 544017, Web: www.sophos.com
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