Re: Ada.Calendar and NTP (and Unix Epoch)

[erlo <erlo@none>]

On 07/24/2012 03:02 PM, Dmitry A. Kazakov wrote:
>
> Is it a standard Ada package?
I guess it's a gnat-specific package - I can't find it in the RM.
>
>> into thinking that I can use To_Ada_Time to convert the NTP epoch base
>> (1-1-1900 0:00) to a variable of type Time.
>
> Take some other base, e.g. 01.01.2010 00:00 [UTC, GMT, CET ...], if you
> have an NTP reading of it. E.g. if NTP uses some astronomical year or other
> method to calculate difference between two times.
>
I will try this approach.
> You should not use Ada.Calendar without knowing exactly what time it
> represents on the given machine.
>
>>> This presumes that they represent *same* time though maybe using different
>>> epochs. You might need to read the UNIX and NTP documentation to learn what
>>> exactly times they do represent. That would give you E2 - E1. To put it
>>> simple: same time = synchronized clocks.
>>
>> This is the exact case.
>
> Which I doubt, but anyway.
>
>
--
Regards
Erlo