From: "Jean-Pierre Rosen" <rosen.adalog@wanadoo.fr>
Subject: Re: Y2K Issues
Date: 1998/10/28
Date: 1998-10-28T00:00:00+00:00 [thread overview]
Message-ID: <717kpq$7cv$1@platane.wanadoo.fr> (raw)
In-Reply-To: MpHnoEEoGvBc@nedcu4
Gautier.DeMontmollin@maths.unine.ch a �crit dans le message ...
>"Standard" depends on what usage is expected from Ada language...
>Since it is a powerful and comfortable tool in many other domains than
>real-time systems (I think in present context to statistics or nature
>sciences), the 1901..2099 range seems to me _a bit_ narrow.
>Apparently - as you write - it's not a problem of sparing some bits or
>adding lots of leap years code. Of course it's very easy to write a sort
>of Long_Calendar from GNAT library sources but I already see people
>using the wrong Calendar etc... But maybe there are solid reasons for that
>range, like the ability of doing 8-bit arithmetics (199<256) with the
years...
You have to put some bounds somewhere. Allowing dates before 1600 for
example
(actually 1543 ? not sure) is really asking for trouble (that's when the
Julian calendar
switched to Gregorian). Note that for genealogy, you may well need dates
before that.
So, as some bound is required and the "natural" start (0) is clearly not
feasible, they
decided to stick to the "current" time, defined as the biggest range that
allowed for
the simplest calculations.
----------------------------------------------------------------------------
J-P. Rosen (Rosen.Adalog@wanadoo.fr)
Visit Adalog's web site at http://perso.wanadoo.fr/adalog
next prev parent reply other threads:[~1998-10-28 0:00 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-10-19 0:00 Y2K Issues John J Cupak Jr
1998-10-19 0:00 ` Tucker Taft
1998-10-19 0:00 ` Joe Gwinn
1998-10-20 0:00 ` Joe Gwinn
1998-10-19 0:00 ` dewar
1998-10-19 0:00 ` Niklas Holsti
[not found] ` <362B8D2F.802F42E6@lmco.com>
1998-10-20 0:00 ` dennison
1998-10-23 0:00 ` Michael F Brenner
1998-10-20 0:00 ` Robert I. Eachus
1998-10-22 0:00 ` Mark Bennison
1998-10-22 0:00 ` dennison
1998-10-23 0:00 ` Robert I. Eachus
1998-10-25 0:00 ` Michael Feldman
1998-10-26 0:00 ` Robert A Duff
1998-10-26 0:00 ` Joel Seidman
1998-10-26 0:00 ` Y2K Issues - Warning Off-Topic Al Christians
1998-10-27 0:00 ` Y2K Issues dewarr
1998-10-26 0:00 ` dennison
1998-10-27 0:00 ` dewarr
1998-10-27 0:00 ` John Herro
1998-10-27 0:00 ` Tucker Taft
1998-10-27 0:00 ` Y2K Issues (well, not really...) Dave Wood
1998-10-28 0:00 ` Y2K Issues dennison
1998-10-28 0:00 ` Dave Wood
1998-10-27 0:00 ` dewarr
1998-10-29 0:00 ` system
1998-10-29 0:00 ` Al Christians
1998-11-02 0:00 ` Marin David Condic
1998-11-04 0:00 ` Robert I. Eachus
1998-11-05 0:00 ` dewarr
1998-11-06 0:00 ` Jerry van Dijk
1998-11-07 0:00 ` dewarr
1998-11-06 0:00 ` Al Christians
1998-11-08 0:00 ` Jerry van Dijk
1998-11-08 0:00 ` dewarr
1998-11-06 0:00 ` Robert I. Eachus
1998-10-27 0:00 ` Gautier de Montmollin
1998-10-28 0:00 ` adam
1998-10-29 0:00 ` Gautier.DeMontmollin
1998-10-28 0:00 ` adam
1998-10-28 0:00 ` Al Christians
1998-10-29 0:00 ` Samuel Mize
1998-11-04 0:00 ` Robert I. Eachus
1998-10-28 0:00 ` Arthur Evans Jr
1998-10-28 0:00 ` dewar
1998-10-28 0:00 ` Gautier.DeMontmollin
1998-10-28 0:00 ` Jean-Pierre Rosen [this message]
1998-10-28 0:00 ` Robert I. Eachus
1998-10-29 0:00 ` Dale Stanbrough
1998-10-29 0:00 ` Samuel Mize
1998-10-29 0:00 ` Mark A Biggar
1998-10-29 0:00 ` Tucker Taft
1998-10-29 0:00 ` dewar
1998-10-29 0:00 ` Tucker Taft
1998-10-30 0:00 ` dennison
1998-10-31 0:00 ` dewarr
1998-11-02 0:00 ` dennison
1998-10-30 0:00 ` Matthew Heaney
1998-10-31 0:00 ` dewar
1998-10-30 0:00 ` Dale Stanbrough
-- strict thread matches above, loose matches on Subject: below --
1998-10-23 0:00 Condic, Marin D.
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