On Sep 30, 2008, at 6:22 AM, Hein, Nashua NH wrote:
On Sep 30, 1:24 am, [EMAIL PROTECTED] (John E. Malmberg) wrote:
Michael G Schwern wrote:
Hi, I need a quick VMS test for the new code to detect the range
of time_t.
VMS keeps time internally as a 64 bit signed integer all platforms,
usually in local time. The base time is November 17, 1958.
Close. They are 100 ns granularity cluncks with a signed 64 bit
counter since the Smithsonian base date 00:00 17-Nov-1858.
So it will happily represent the date of birth for a centenarian, as
well as the end date for a new 99 year lease.
The build-in ascii formatting is restricted to the year 9999 and
typically includes centi-seconds.
The negative times are considered 'delta times', which are formate to
DDDD HH:MM:SS.CC
Nice summary. None of which has anything to do (directly) with the
question, which was about the behavior of time_t. As John's test
showed, time_t is by default a 32-bit unsigned value, but can be
forced to be signed with a compiler flag. There are some indications
in the headers that 64-bit time_t will be supported in the future. If
and when that happens, it's impossible to predict whether 64-bit will
ever be the default or whether it will be signed or unsigned.
________________________________________
Craig A. Berry
mailto:[EMAIL PROTECTED]
"... getting out of a sonnet is much more
difficult than getting in."
Brad Leithauser
