[omniORB] How to convert long integer in python to unsignedlong in CORBA

[Luke Deller]

Hi Vito,

On Thu, 2005-10-27 at 07:49 -0700, Vito Bica wrote:
> I have defined the following value in python:
> 
> x = 0x80000000
> 
> Python seems to interpret this as an unsigned value, and therefore makes it 
> a long integer (2147483648, one more than the maximum positive value 
> allowable for a signed 32 bit int).

Yes, this is the behaviour of Python since version 2.4.  You get a
negative value by putting a '-' sign at the front, just like for decimal
literals.

> I try to pass it as a value in a CORBA method that takes an argument of 
> CORBA type "Unsigned Long". Python balks, saying that it cannot convert the 
> python Long Integer type to an integer. What I really want is to get that 
> value passed as-is as an argument to that CORBA method. Is there anything I 
> can do in Python or with some omnipy fucntion that will map that 32 bit 
> value into the CORBA unsigned long argument?

This should work already.  I just double checked, using Python 2.4.1 and
omniORBpy 2.6, and I can pass 0x80000000 to a CORBA method with an IDL
unsigned long argument.

Can you give us instructions on how to replicate your error?

Regards,
Luke.

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