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From: mbrinn@bbn.com (Marshall Brinn)
Newsgroups: comp.lang.ada
Subject: Limits on type Duration and package Calendar
Message-ID: <57925@bbn.BBN.COM>
Date: 2 Jul 90 17:11:30 GMT
Sender: news@bbn.com
Reply-To: mbrinn@BBN.COM (Marshall Brinn)
Organization: Bolt Beranek and Newman Inc., Cambridge MA
Lines: 29



I have come across a problem with package CALENDAR, and would be interested
in hearing what others have to say/have done about it.


In the LRM, it defines that type DURATION need only ranuge up to 84600.0,
ie., the number of seconds in a day (the definition of CALENDAR.DAY_DURATION).


However, package CALENDAR provides functions "+" and "-" where the difference
between two times is given as a DURATION. How then does this package handle
the difference between two days that are more that one day apart? Some 
compilers I've tried seem to have a reasonably high value for DURATION'last,
at least one (TELESOFT TELEGEN2 1.4) used the one-day upper bound.

Yes, I can "roll my own", but it seems a shame that I can't use the "standard"
calendar interface because it is not sufficient to such a simple task.


Any suggestions on the "Standard" ADA way to deal with time gaps > 1 day
would be appreciated.



Marshall Brinn (mbrinn@bbn.com)
70 Fawcett St.
Cambridge, MA 02138
617-873-2717