Re: Calling RPG program from C

[Jevgeni Astanovski <Jevgeni.Astanovski@xxxxxxxxxxxx>]

Hi, Mark,
I have no problems with C prototypes for the program, I want to call. I simply do not have this prototype!
I only have a plain text description of the fields:
@ETK	A(4)
@ETN	S(7,0)

What I cannot understand is if the second parameter (@ETN) must be passed as char * or decimal(7,0) *.

Dennis thinks, that it should be pointer to decimal(7,0).
Going to try this.


-----Original Message-----
From: c400-l-bounces+jevgeni.astanovski=sampopank.ee@xxxxxxxxxxxx [mailto:c400-l-bounces+jevgeni.astanovski=sampopank.ee@xxxxxxxxxxxx] On Behalf Of Mark S. Waterbury
Sent: 7. märts 2011. a. 16:21
To: C programming iSeries / AS400
Subject: Re: [C400-L] Calling RPG program from C

Jevgeni:

The IBM _WebSphere Development Studio ILE C C++ Programmers Guide_ 
(SC09-2712) contains a whole chapter (Chapter 25. Working with 
Multi-Language Applications) that covers these topics in detail, with 
many examples,.etc., and see also "Chapter 26: Using Packed Decimal Data 
in a C program".

If you are still having problems, post the C prototype for the program 
you are trying to call, and also the lines of C code where you are 
attempting to invoke it, so others can try to offer specific suggestions.

I hope that helps,

Mark S. Waterbury

> On 3/7/2011 8:44 AM, Jevgeni Astanovski wrote:
> Hi all,
> Too bad not being familiar also with RPG...
>
> I'm trying to call an RPG program from my ILE/C program.
> RPG program parameters are described in the manual, there are plenty of parameters, that are described like this:
> @ETK	A(4)
> @ETN	S(7,0)
> I understand, that @ETK is char(4). @ETN seems to be SIGNED(7,0) so from the C point of view effectively also char(7).
> When I call the program filling @ETN with 7 zeroes (the parameter is marked as "not used" in the manual) I get a decimal error MCH1202.
> I ask the manufacturer - what is the type of the parameter?
> He answers: 7 0
> :-(
> He even sent me a source, below is a row from it:
> 62000      C                   PARM                    @ETN              7 0
> But frankly speaking it tells me close to nothing.
>
> Can anyone tell me, is it decimal(7,0) or char(7)?
>
> TIA,
> Jevgeni