Re: UDS & Allocations

[Jeff Young <cooljeff913@xxxxxxxxx>]

Buzz,
You can define the LDA in RPGIII using the *NAMVAR   DEFN in your "C" specs.
The following is an example:
ILDA         DS                                    
C           *NAMVAR   DEFN *LDA      LDA           
C                     IN   LDA                     

By specifing *LDA in factor 2, you are indicating the the Local Data Area is to be used.
The UDS on the "I" spec indicated an implictly defined Data Area Data Structure.  By leaving out the name on the "I" spec, the system understood that it was to use the Local Data Area.
The use of UDS to define a Data Area Data Structure implied a Read  (IN)  at the start of the program and a Write (OUT) at the end.

There is no requirement for using that method other than the desire to avoid the *NAMVAR statement and coding the IN and OUT functions yourself.

Hope this helps,
 
Jeff Young 
Sr. Programmer Analyst
IBM -e(logo) server Certified Systems Exper - iSeries Technical Solutions V5R2 
IBM  Certified Specialist- e(logo) server i5Series Technical Solutions Designer V5R3
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----- Original Message ----
From: Jerry Adams <jerry@xxxxxxxxxxxxxxx>
To: RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>
Sent: Wednesday, November 28, 2007 12:19:03 PM
Subject: Re: UDS & Allocations

Buzz,

Did you mean RPG III?  RPG IV is not OPM.

If it is RPG III, is converting it to IV out of the question?  Once it's 
in IV, you can do what Charles suggested.

    * Jerry C. Adams
*IBM System i Programmer/Analyst
B&W Wholesale Distributors, Inc.* *
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Buzz Fenner wrote:
> Charles, the program in question is an OPM RPG IV program.  I'm unaware of
> an alternate way to define the data area data structure other than to use
> "UDS".
>
> Buzz Fenner
> Systems Analyst/Network Administrator
> 870.930.3374
> mailto:bfenner@xxxxxxxxxxxxxxxx
>
>
>
> message: 5
> date: Wed, 28 Nov 2007 09:54:47 -0500
> from: "Wilt, Charles" <WiltC@xxxxxxxxxx>
> subject: RE: RPG400-L Digest, Vol 6, Issue 1131
>
> Buzz,
>
> There's an implicit IN *LOCK done by the cycle, along with an implicit OUT,
> on a UDS.
>
> To prevent, remove the U and use the DTAARA keyword on the define.
>
> HTH,
> Charles
>
>
>
>
>
>
>
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