Re: calling C from OPM RPG

[RPower@xxxxxxxxxx]

<snip>
are
you saying it's also possible to get the results of step 'b' back up to
the OPM RPG program, despite the fact that step 'a' is calling out to a
program written in another language?
<snip>

I believe what he was referring too, was to write an ILE RPG program to 
accept the parms from the OPM program, use the ILE RPG to call your C 
api's that will solve the difference in language calls because you can 
call an ILE RPG program from an RPG OPM (does anyone else think Opium when 
you say that lol) and then use the ILE RPG as a 'bridge' between the two. 
But personally, I'd convert the OPM program to ILE.

Ron Power
Programmer
Information Services
City Of St. John's, NL
P.O. Box 908
St. John's, NL
A1C 5M2
Tel: 709-576-8132
Email: rpower@xxxxxxxxxx
Website: http://www.stjohns.ca/
___________________________________________________________________________
Success is going from failure to failure without a loss of enthusiasm. - 
Sir Winston Churchill




jared <jhunter@xxxxxxxxxxxx> 
Sent by: rpg400-l-bounces@xxxxxxxxxxxx
14/09/2004 11:20 PM
Please respond to
RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>


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RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>
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Subject
Re: calling C from OPM RPG






[snip]
> The one thing that OPM programs can do is call other programs -- both 
ILE
> and OPM programs can be called.  Therefore, it's possible to write an
> interface that you could call from an OPM application.

is this an accurate picture of what you're suggesting below?

OPM RPG <-a-> ILE C wrapper program <-b-> ILE C API

> Assuming that by "C APIs" you mean ILE C, you can write an interface in
> any ILE language that acts as a program and accepts parameters from an 
OPM
> legacy program. It can call the API, and return the results in the same
> set of parameters.

Clearly ILE allows in/out parameter passing in step 'b' (a procedure call
to a function inside a bound SRVPGM, say).  (Not to be obtuse, but) are
you saying it's also possible to get the results of step 'b' back up to
the OPM RPG program, despite the fact that step 'a' is calling out to a
program written in another language?

> Though, personally, I'd be inclined to convince your customer to join 
the
> modern world.

That's my current plan.  It'd be nice to know there's a possible
alternative though, in case they're overly resistant to progress. :)

Thanks for the reply!

/j

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