hex/oct constants > sys.maxint will return positive values in Python 2.4 and up

[Tim Peters]

[Jon Ribbens]
> My jonpy modules are producing the following warning when compiled
> under Python 2.3 (current cvs):
>
>   FutureWarning: hex/oct constants > sys.maxint will return positive
>   values in Python 2.4 and up
>
> The offending line of code is as follows:
>
>   data = struct.pack("!I", len(nameval[0]) | 0x80000000)
>
> As far as I can tell, this change, when it comes in, will make no
> difference at all to the way this code works. Am I right?

Probably, because the ultimate consumer of the computed value is a pack
format using a platform-independent definition of "I".  Without the leading
"!" in the format, though, you get a platform-dependent pack, and 0x80000000
doesn't mean the same thing across all platforms today (but will starting in
Python 2.4).

> What am I supposed to do to make the warning go away? Rewrite 0x80000000
> as 0x40000000 * 2 ? ;-)

Write it in a platform-independent way.  If you *intended* this literal to
mean "a 1 bit followed by 31 zero bits", then stick an L on the end of the
literal.