now() and arithmetic

[Bruce Fitzsimons]

Hello,

Does anyone have some prebuilt routines for manipulating now() tuples, or
for converting them into C style seconds-since-blah values?

Alternatively can someone tell me the max size of the MicroS/S/MegaS
integers, so I can tell when it should overflow from one to the other (and
then I'll build some routines)?

I could use date/time tuples, but I'm only interested in differences most of
the time. I'm building some replacement aplio voip phone servers (similar to
H.323 Gatekeeper, but proprietary), and I want to age calls.

Thanks a lot in advance,
Bruce