RE: Big API Receiver Variables (was Re: QtocRtvNetCnnDta) -- RPG400-L

Hi,

Euh... isn't

        pMem = %Alloc(4000000);

... a bit easier ?

Kind regards,
Paul

-----Original Message-----
From: bill.reger@convergys.com [mailto:bill.reger@convergys.com]
Sent: 24 April, 2002 16:40
To: rpg400-l@midrange.com
Subject: Big API Receiver Variables (was Re: QtocRtvNetCnnDta)



There is another technique for handling these big Receiver Variables
that was suggested to me by Craig Rutledge.  And that is to receive
them into a User Space.  Though not documented anywhere that I can
see, this lets you receive up to 16Meg of Receiver Variable data,
more than enough for most anything!  Let me give you the basics
using QDBRTVFD API with format FILD0200:

1.  Define a Data Structure and base it on a pointer:

     D RcvVarDS        DS           145    based(RcvVarDSPtr)
     D  BytesRtnd              1      4b 0
     D  BytesAvail             5      8b 0
     D  NumOfFlds            144    145b 0

2.  Use the QUSCRTUS API to create a user space:

     C                   CallP     quscrtus(UsrSpace :
     C                                    'QDBRTVFD  ' :
     C                                    4000000 :
     C                                    x'00' :
     C                                    '*ALL' :
     C                                    'Field Info.' :
     C                                    '*YES' :
     C                                    APIerror

3.  Use the QUSPTRUS API to get the address of the user space
into the same based pointer:

     C                   CallP     qusptrus(UsrSpace :
     C                                    RcvVarDSPtr :
     C                                    APIerror)

4.  Call your API that has the big Receiver Variable and reference
your Data Structure name (with the same length as the size of
the user space):

     C                   CallP     qdbrtvfd(RcvVarDS :
     C                                    4000000 :
     C                                    RtnFilQual :
     C                                    'FILD0200' :
     C                                    FileName :
     C                                    RcdFmt :
     C                                    '0' :
     C                                    '*FILETYPE ' :
     C                                    '*EXT      ' :
     C                                    APIerror)

Voila!  You have received the Receiver Variable data into your user space.

Bill

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