From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: Ada decimal types
Date: Fri, 5 May 2006 15:32:07 -0500
Date: 2006-05-05T15:32:07-05:00 [thread overview]
Message-ID: <rImdnXiKC_KyK8bZRVn-pA@megapath.net> (raw)
In-Reply-To: sKG6g.6427$TT.4592@twister.nyroc.rr.com
"REH" <me@you.com> wrote in message
news:sKG6g.6427$TT.4592@twister.nyroc.rr.com...
> > I would use a fixed point type, not a decimal type.
> A decimal type is a fixed pointed type. I don't want to use a binary
fixed
> point because it would change the precision. Currently any value of
> microsecond granularity can be represented. If I use a binary fixed
point,
> that would change.
Decimal fixed point types have different rules for rounding in operations
like "*" and "/" than regular ("ordinary") fixed point does. Be sure that
that behavior doesn't matter to your application. Otherwise, there is no
difference between a decimal fixed point and an ordinary fixed point with an
appropriate small clause:
type Mission_Time_Type is delta 1.0e-6 range 0.0 .. (2.0**32) - 1.0;
for Mission_Time_Type'Small use 1.0e-6;
Ada 95 compilers *could* reject the above, but since they have to implement
it anyway to support decimal types, there is no good reason to do so.
Randy.
prev parent reply other threads:[~2006-05-05 20:32 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-04 15:23 Ada decimal types REH
2006-05-04 18:17 ` Jeffrey R. Carter
2006-05-04 22:20 ` REH
2006-05-05 9:14 ` Stephen Leake
2006-05-05 11:33 ` REH
2006-05-05 16:49 ` tmoran
2006-05-05 18:08 ` REH
2006-05-05 18:49 ` tmoran
2006-05-05 18:59 ` REH
2006-05-06 8:59 ` Keith Thompson
2006-05-06 14:01 ` REH
2006-05-06 15:48 ` Simon Wright
2006-05-06 16:39 ` REH
2006-05-08 21:19 ` Randy Brukardt
2006-05-09 23:21 ` REH
2006-05-10 1:08 ` Keith Thompson
2006-05-10 5:37 ` Simon Wright
2006-05-10 12:22 ` REH
2006-05-10 20:47 ` Randy Brukardt
2006-05-10 21:26 ` REH
2006-05-10 20:52 ` Randy Brukardt
2006-05-11 5:51 ` Simon Wright
2006-05-11 22:33 ` Randy Brukardt
2006-05-05 20:32 ` Randy Brukardt [this message]
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