[LEAPSECS] Tomorrow's Leap Second Today
http://blogs.wsj.com/speakeasy/2015/06/29/john-oliver-really-wants-you-to-enjoy-tomorrows-leap-second/ ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
Re: [LEAPSECS] EBML: yet another date format?
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) -Brooks ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
Re: [LEAPSECS] EBML: yet another date format?
Hal Murray hmur...@megapathdsl.net wrote: POSIX uses 32 bits of seconds and 32 bits of nanoseconds. POSIX doesn't specify the size of time_t. Tony. -- f.anthony.n.finch d...@dotat.at http://dotat.at/ Fair Isle, Faeroes: Southwest 4, backing southeast 5 or 6 later. Moderate, occasionally slight in southeast Fair Isle. Rain at times, fog patches. Moderate or good, occasionally very poor. ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
[LEAPSECS] a new type of negative leap second
The folks at http://www.timeanddate.com/time/leapseconds.html have a leap second animation on the top right side of the page. I'm not sure how it displays for you, but attached are some screen shots on my end. Cute. /tvb___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
Re: [LEAPSECS] a new type of negative leap second
Problem solved! On 2015-06-29 01:47 PM, Tom Van Baak wrote: The folks at http://www.timeanddate.com/time/leapseconds.html have a leap second animation on the top right side of the page. I'm not sure how it displays for you, but attached are some screen shots on my end. Cute. /tvb ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
Re: [LEAPSECS] EBML: yet another date format?
Looks to me they mean 128 bits? How did you get that? 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. 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.) -- These are my opinions. I hate spam. ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
Re: [LEAPSECS] EBML: yet another date format?
In message 20150629061957.aafc4406...@ip-64-139-1-69.sjc.megapath.net, Hal Mu rray writes: Looks to me they mean 128 bits? How did you get that? 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. 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 overlook that they moved the epoch 30 years. Not enough, but enough to make not a problem in my lifetime. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ LEAPSECS mailing list LEAPSECS@leapsecond.com https://pairlist6.pair.net/mailman/listinfo/leapsecs
