RE: Arrays of Structures as a parameter in V5R1

["Christen, Duane J." <dchristen@xxxxxxxxxxxxx>]

Dave
There are several ways to do this, I am assuming that the structure will be
passed by pointer, if not remove the BASED variable.
 
Option 1:
Use a multiple occurance data structure, remember to use the OCCURS
statement to change elements.

skuData DS                              Occurs(30)
                                                        Based(skuDataBase)
sku                             15A
num                              5P 0
skuSize                 15A
qtyForSize               7P 0
dateForSize              8P 0

For the return code you will need to use pointers with this option,
skuDataElements will have to be passed in if you are not always expecting 30
elements, otherwise you can use the %Elem(skuData) BIF in its place.

returnCode              10I     Based(returnCodeBase)

returnCodeBase = %Addr(skuData) + skuDataElements * %Size(skuData) 



Option 2:
Use a structures of arrays, each array can be used exactly as an array

                        DS
skuData                 42A     Dim(30)
                                                        Based(skuDataBase)
  sku                           15A     Overlays(skuData : 1)
  num                            5P 0   Overlays(skuData : *NEXT)
  skuSize               15A     Overlays(skuData : *NEXT)
  qtyForSize     7P 0   Overlays(skuData : *NEXT)
  dateForSize    8P 0   Overlays(skuData : *NEXT)
returnCode              10I

If the return code will always be at the end of the 30 elements then the
second option will produce the correct results, otherwise you will need to
play with some pointers, you will also need to have the number of SKU
elements passed in. 

returnCode              10I     Based(returnCodeBase)

returnCodeBase = %Addr(skuData) + skuDataElements * %Size(skuData)


Duane
 




 

-----Original Message-----
From: Dave Murvin [mailto:davem@xxxxxxxx]
Sent: Monday, August 25, 2003 9:38 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Arrays of Structures as a parameter in V5R1


Hi,

Looking for suggestions for ways to program arrays of structures (which 
also have arrays) as an input parameter.  Program will be called from an 
external Java program using pcml.  Unfortunately we are on V5R1 and the 
project deadlines may not allow an upgrade to V5R2 before implementation.

Within the RPGLE program the input structure looks something like this:

SKU                     15,A
num1                    5,0
SKU Size 1              15,A
Qty for Size 1          7,0
Date for Size 1 8,0
.
.
.
SKU Size 36             15,A
Qty for Size 36 7,0
Date for Size 36        8,0

This whole structure will be repeated up to 30 times in one call to the 
program.

There is also a return code at the end of all of this.

Partial list of the proposed pcml call looks something like this:

<struct name='availreply' >
         <data name="size" type="char" length="XX"/>
         <data name="availabilityQty" type="<packed or zoned>" length="XX"/>
         <data name'"date" type="<[acked or zoned>" length="8"/>
</struct>

<struct name='stylerequest' usage='inputoutput'>
         <data name="styleNumber" type="char" length="XX" usage='input"/>
         <data name="reply" type="struct" struct="availreply" 
usage="output" conunt="36"/>
</struct>

<program name="pgm1" path="/QSYS.LIB/.../pgm1.pgm">
         <data name="request" type="struct" struct="Stylerequest" 
count="30" usage="inputoutput"/>
         <data name="returnCode" type="char" length="XX" usage="output"/>
</program>

The call will be requesting from one to 30 SKUs at a time.

So far, I am not seeing any way to do this other than one huge input parm 
with all the fields listed individually.  Perhaps a list of 30 structures, 
or would that be 30 parameters?

Thanks for the help.


Dave Murvin
DRM Enterprises, Inc.


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