• Subject: RE: Multiple occurance data structures
  • From: Ed.Doxtator@xxxxxxxxx
  • Date: Fri, 10 Oct 1997 12:57:21 +0100

Rudolf wrote:

>One possibility is to use the heap now available in ILE RPG.

>You can ALLOC some structure with n occurrences.
>Later you can REALLOC this thing to m occurences,
>where m can be less or greater than the initial n.
The idea of using the heap is a good one.  You'll have to write routines to
support heap management.  The ILE RPG Programmer's Guide has some examples
to illustrate dynamically-allocted memory.

Another idea might be to create a C module that does nothing but linked
list processing.  You'd need routines to create and delete the lists, add
records, delete records, and fetch records.

These ideas will only work under ILE RPG.  Under OPM RPG, there isn't
access to a heap, so you'd have to pull a some sort of stunt using
something like a user space or, if the program is interactive, a
non-displayed subfile.

-Doc





Rudolf.Wiesmayr @ mag.linz.at on 10/10/97 07:19:21

Please respond to MIDRANGE-L@midrange.com

To:   MIDRANGE-L @ midrange.com
cc:    (bcc: Ed Doxtator/SSAOT)
Subject:  RE: Multiple occurance data structures




One possibility is to use the heap now available in ILE RPG.
You can ALLOC some structure with n occurrences.
Later you can REALLOC this thing to m occurences,
where m can be less or greater than the initial n.
BTW: I am not a 'native RPG writer', my background is the
Algol family of languages. And concerning language constructs,
even C is some relative to this forefather.
So I have not tested my proposal.
HTH,
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-----Original Message-----
From:     Bob Luebbe [SMTP:bluebbe@conn2000.com]
Sent:     Wednesday, October 08, 1997 8:28 PM
To:  'MIDRANGE-L@midrange.com'
Subject:  Multiple occurance data structures
Is there a way to dynamically increase the size of a multiple occurance
data structure in RPG IV?

att1.unk


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