RE: MOVEA -> EVAL -- RPG400-L

But a compilation Listing Cross Reference does give you the usage of that
indicator if you use MOVEA.  If it is a large range of indicators,  such as
those used for complicated display files,  I use to set them for their
initial value,   and then when testing it is on a one to one that I set
them.   Some subfiles programs of mine have had to use up to 4 indicators
per field (RI, PC, PR, ND) and twenty or more Eval *INxx = *OFF  takes a lot
of space.

I suppose the best way would be to have basing pointers against the
indicators and update them that way,  but old habits die hard.

Alan

Alan

-----Original Message-----
From: owner-rpg400-l@midrange.com [mailto:owner-rpg400-l@midrange.com]On
Behalf Of Jim Langston
Sent: Friday, June 15, 2001 7:10 PM
To: RPG400-L@midrange.com
Subject: Re: MOVEA -> EVAL


Hmm.. I would have to argue, however, that MOVEA is not the "best"
solution in this case.  The "best" solution is to either get rid of
the indicators altogether (bad indicators, bad!) or set them thus:

C             Eval    *IN41 = *Off
C             Eval    *IN42 = *Off

Why?  Maintainability.  I'm maintaining a huge program.  I want to use a
new indicator or see where one is used, such as *IN42.  So what do I do?
I hit F10, type 42 and press F16 to search for 42.  And I find out where
indicator 42 is used (and a lot of line number 42's, etc...).

Using your method, I would be oblivious to the fact that, in the first case
*IN42 is in fact being used and is being turned off, and in the second case
is being used and is being turned on.

If I ran across this code in a program I was maintaining I would immediately
replace the code with Eval  *IN41 = *Off etc...

On a related note, S36 code conversation to native RPG and RPGIV would be
much, much easier if programs didn't use all kinds of tricks.

Regards,

Jim Langston

Me transmitte sursum, Caledoni!

Peter Dow wrote:
>
> Hi Barbara,
>
> I ran across this piece of code today, and while I realize this isn't the
> "best" solution, it was pretty common in pre-RPGLE days:
>
> C                   MOVEA     '0000'        *IN(41)
> Set indic.
>
> In the days when a lot of indicators were required to do things with a
> display file, this was a common technique to turn off a range of
indicators.
> It could also be used to both seton and setoff indicators within a range,
> e.g.
>
> C                   MOVEA     '01010101'    *IN(41)
> Set indic.
>
> which reduced two SETON/SETOF statements to a single line of source code.
>
> Thought you might be interested.
>
> Peter Dow
> Dow Software Services, Inc.
> 909 425-0194 voice
> 909 425-0196 fax
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