scottklement.com

Posted: **Tue Aug 29, 2023 12:59 am**

I have an external character data structure that is 1910 characters. I want to group the last several contiguous fields in the structure into one field so I can store the information in an array and then build a JSON string including it. The field would cover the last 1215 characters of the external DS. How would I define that field in the program within the external DS? Thanks

Dcl-ds DS_Response extname('ISSUERESP')
Resp_Printers Char(1215) Overlay ??
End-ds;

Key Fld Start Fld
Field Name Pos Typ Pos Len Field Text
---------- --- --- ----- ----- ---- --- --------------------------------------------------
PRTTYPDFRP A 696 10 Printer Type - Default Start the field here
PRTTRYAERP A 1910 1 Printer Tray - Alternate End the field here

There are a lot fields in between. There are 15 array elements in the 1215 character portion of the DS
One array element would be:

PRTTYPDFRP A 696 10 Printer Type - Default
PRTNAMDFRP A 706 10 Printer Name - Default
PRTNIDDFRP A 716 60 Printer Network ID - Default
PRTTRYDFRP A 776 1 Printer Tray - Default

I want to place the 15 elements into a DS:

Dcl-DS Ds_Printers Qualified Dim(15);
printerType Char(10);
printerName Char(10);
networkID Char(60);
trayNumber Char(1);
End-DS;

Posted: **Tue Aug 29, 2023 1:46 am**

Reposting code snippets with code tags -- since I found the original post very difficult to read.

Code: Select all

Dcl-ds DS_Response extname('ISSUERESP') 
   Resp_Printers  Char(1215) Overlay  ?? 
End-ds;

Code: Select all

                  Key Fld Start  Fld                                                             
Field Name Pos Typ  Pos   Len       Field Text                                        
---------- --- --- ----- ----- ---- --- --------------------------------------------------
PRTTYPDFRP      A    696    10          Printer Type - Default   Start the field here       
PRTTRYAERP      A   1910     1          Printer Tray - Alternate End the field here

There are a lot fields in between. There are 15 array elements in the 1215 character portion of the DS 
One array element would be:

PRTTYPDFRP      A    696    10          Printer Type - Default      
PRTNAMDFRP      A    706    10          Printer Name - Default      
PRTNIDDFRP      A    716    60          Printer Network ID - Default
PRTTRYDFRP      A    776     1          Printer Tray - Default

Code: Select all

Dcl-DS Ds_Printers Qualified Dim(15);
   printerType       Char(10);
   printerName       Char(10);
   networkID         Char(60);
   trayNumber        Char(1);
End-DS;

Posted: **Tue Aug 29, 2023 2:19 am**

I think you want something like the following (if I understand you correctly).

Code: Select all

dcl-ds ds_response ext extname('ISSUERESP') qualified;
  dcl-ds Resp_Printers dim(15) samepos(PRTTYPDFRP);
    printerType char(10);
    printerName char(10);
    networkId   char(60);
    trayNumber  char(1);
  end-ds;
end-ds;

Posted: **Tue Aug 29, 2023 3:31 am**

My apologies for not formatting it well. I should have also stated that I'm on 7.2. We have 7.4 on the dev box but can't use it until all prod LPAR's have been upgraded. RDI flagged samepos as a keyword that is not allowed on a DS definition. So given being on 7.2, I'm not sure what to do. Thanks Scott.

Posted: **Tue Aug 29, 2023 4:01 am**

Unfortunately, it means you probably will need to hard-code the position.

Code: Select all

dcl-ds ds_response ext extname('ISSUERESP') qualified;
  dcl-ds Resp_Printers dim(15) pos(696);
    printerType char(10);
    printerName char(10);
    networkId   char(60);
    trayNumber  char(1);
  end-ds;
end-ds;

Posted: **Tue Aug 29, 2023 7:36 pm**

Thank you so much Scott. That worked fine. Thank you for YAJL as well.

scottklement.com

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