Re: DDE bugs

[bmorris@xxxxxxxxxx]

>Date: Wed, 03 Jan 2001 15:55:34 +0100
>From: Anton =?iso-8859-1?Q?Gombk=F6t=F6?= <gombkoetoe@ASSOFT.COM>
> ...
>A (RPGIV) TESTN works as expected, it doesn't set on any result indicator.

>So one Op-code says it isn't a valid number and the next one feels OK with

>the value?!
>
>Barbara, is this really working as designed? The puzzle parts do not seem
>to fit properly....

Anton, I don't know how "designed" the behaviour is, at least in RPG terms,
that invalid zones are disregarded in zoned data.  I know that RPG IV was
designed to be compatible with RPG III in this respect, but the original
RPG III behaviour is just "how it works", as far as I know.

TESTN is well-defined to test a character field for certain specific
values.
TESTN says a character is "numeric" if the zone is C, D or F, while
the system (and RPG) are always happy with a zone of any character from A
to F.  At the end of the TESTN documentation, it says that it can be
used to validate fields before they are used in numeric operations where
their use may cause undesirable results or exceptions.  In this case,
TESTN would reject the value because of the embedded blanks; this is
a case where the use of the data would lead to an undesirable result
rather than an exception.

>What happens when we get George Farr's proposed RANGE-keyword on the
>D-statements?
>DTLHI#    RANGE(0 999999999) - would the above value be an error or not?

I don't know - it's something we'd have to decide.  But my first thought
is that since RPG thinks its value is 1050202, then it is within range, and
therefore ok.  What if the range was -1 to 1: with the preferred signs,
that
allows X'D1', X'F0' and X'F1'.  Should X'B1' be allowed or not?  What
about X'C1' that even TESTN likes?

Barbara Morris


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