[LEAPSECS] EBML: yet another date format?
brooks at edlmax.com
Mon Jun 29 08:49:05 EDT 2015
On 2015-06-29 02:19 AM, Hal Murray wrote:
>> Looks to me they mean 128 bits?
> How did you get that?
Er, by not thinking very clearly :-\
>>> supported by a signed 8-octet integer in nanoseconds centered on
> 8*8 is 64. I didn't see anything about using two of them.
Right. My obvious error.
> POSIX uses 32 bits of seconds and 32 bits of nanoseconds. That will wrap in
> 2038. Using all nanoseconds gets a few more bits so the overall range will
> be a bit bigger. (Whether it's enough bigger is another matter.)
You can get to approximately 3000 years of seconds and retain the Leap
Second count in 32 bits with -
21 bits unsigned - Days (86400 second days) (2^21 = 2097152 max /
365.2425 = 5741.8 years max)
11 bits unsigned - Leap Seconds (2^11 = 2048 max * 1.65 Years per Leap
Second = 3379.2 years max approx)
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