Yo Hal! On Wed, 29 Dec 2021 13:31:44 -0800 Hal Murray via devel <devel@ntpsec.org> wrote:
> Gary said:
> >> The code I was expecting doesn't know anything about leaps.
> >> It would be close to:
> >> while (t < PIVOT) t += 1024*7*86400
>
> > Which will break after 1024 weeks. Which sounds like a lot, but
> > there are a lot of GPS that are more than 1024 weeks old since
> > their firmware was cut.
>
> Your code has similar problems. Right?
Only a few of the problematic drivers have the problem. As lone as the
NMEA reports the correct year, all is good.
> That's 1024 weeks after ntpsec is released. I'm willing to assume
> that ntpsec gets updated more often than that.
Not 100%, but close.
> We could add a config option to sepcify the pivot date but that
> doesn't seem worth the effort.
Maybe for testing, but anyone using a 1024 week old ntpd will not have read
the man page in a long time.
> Do we have any place to collect documentation for quirks like this?
Prolly best in the NMEA doc.
RGDS
GARY
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