Achim Gratz <strom...@nexgo.de>:
> Hal Murray writes:
> > How about something like l_fp_time (unsigned) and l_fp_delta or l_fp_offset
> > (signed)?
>
> The l_fp timestamps must be unsigned since they are just counting
> seconds from the beginning of the epoch. That means that there's an
> assumption somewhere in NTP that differences between those timestamps,
> which are necessarily signed unless you want to carry the direction of
> the difference as a separate datum, are limited to less or equal than
> half the range of that type. If you compute that difference in modulo
> arithmetic, then timestamp differences between two adjacent epochs are
> still valid as long as the true time difference is less than half an
> epoch. In other words, you don't have to explicitly check for the epoch
> of either timestamp if you assume that these are less than 68 years
> apart.
I also confirm this.
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