Am 25.07.2012 13:48, schrieb Antoine Pitrou: >> I'd vote for two separate numbers, the first similar to JDN (Julian Day >> Number [1]), the second for nanoseconds per day. 3600 * 1000000 fit >> nicely into an unsigned 32bit int. > > But 24 * 3600 * 1e9 doesn't. Perhaps I didn't understand your proposal.
What the h... was I thinking? I confused nano with micro and forgot the hours, how embarrassing. :( days ---- 32bit signed integer numbers of days since Jan 1, 1 AD in proleptic Gregorian calendar (aka modern civil calendar). That's Rata Die minus one day since it defines Jan 1, 1 AD as day 1. This allows days between year 5.8 Mio in the past and 5.8 Mio in the future ((1<<31) // 365.242 ~ 5879618). nanoseconds ----------- 64bit signed or unsigned integer more than enough for nanosecond granularity (47bits), we could easily push it to pico seconds resolution (57bits) in the future. Christian _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
