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  1.  Home
  2. RPG400-L
  3. December 2001

Réf. : No. of Parameters (RPGIII)

About ILE Concepts (SC41-5606)

6.2.3 Passing Arguments to ILE Procedures

In an ILE procedure call, an argument is an expression that represents a
value that the calling procedure
passes to the procedure specified in the call. ILE languages use three
methods for passing arguments:

by value, directly
          The value of the data object is placed directly into the argument
list.

by value, indirectly
          The value of the data object is copied to a temporary location.
The address of the copy (a pointer) is
          placed into the argument list.

by reference
          A pointer to the data object is placed into the argument list.
Changes made by the called procedure to the
          argument are reflected in the calling procedure.

HLL semantics usually determine when data is passed by value and when it is
passed by reference. For
example, ILE C/400 passes and accepts arguments by value, directly, while
for ILE COBOL/400 and ILE
RPG/400, arguments are usually passed by reference. You must ensure that
the calling program or procedure
passes arguments in the manner expected by the called procedure. The ILE
HLL programmer's guides contain
more information on passing arguments to different languages.

A maximum of 400 arguments are allowed on a static procedure call. Each ILE
language may further restrict
the maximum number of arguments. The ILE languages support the following
argument-passing styles:

   ILE C/400 passes and accepts arguments by value directly, widening
integers and floating-point values.
    Arguments can also be passed by value indirectly by specifying the
#pragma argument directive for a called
    function.

   ILE COBOL/400 passes arguments by reference or by value indirectly. ILE
COBOL/400 accepts parameters
    only indirectly.

   ILE RPG/400 passes and accepts arguments by reference.

  ILE CL passes and accepts arguments by reference.

6.2.5 Passing Arguments on a Dynamic Program Call

Calls to ILE or OPM programs (in contrast to calls to ILE procedures)
usually pass arguments by reference,
meaning that the called program receives the address of the arguments. EPM
programs can receive arguments
passed by reference, by value directly, or by value indirectly.

When using a dynamic program call, you need to know the method of argument
passing that is expected by
the called program and how to simulate it if necessary. A maximum of 255
arguments are allowed on a
dynamic program call.  Each ILE language may further restrict the maximum
number of arguments.  Information
on how to use the different passing methods is contained in the ILE HLL
programmer's guides, and, for
passing methods in EPM, in the Pascal User's Guide, SC09-1844.

Best regards

Yannick.Jacqueline
Service Informatique
Tél : 02-31-66-46-69
E-Mail : yjacqueline@guydegrenne.fr
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                    "hrishikesh
                    kotwal"                  Pour :  rpg400-l@midrange.com
                    <hdkotwal@hotmail        cc :
                    .com>                    Objet :      No. of Parameters 
(RPGIII)
                    Envoyé par :
                    rpg400-l-admin@mi
                    drange.com


                    06/12/01 09:33
                    Veuillez répondre
                    à rpg400-l






[ Converted text/html to text/plain ]

Hi all,



Can someone tell me what is the maximum number of parameters that can be
passed to a RPG program?



Thanks in advance.
Regards,

Hrishikesh Kotwal

>From: Scott Klement
>Reply-To: rpg400-l@midrange.com
>To: "'rpg400-l@midrange.com'"
>Subject: RE: Reverse DNS Lookup...
>Date: Thu, 6 Dec 2001 01:27:47 -0600 (CST)
>
>
>You're on the right track, but not quite right.
>
>MX is a mail exchanger record. In other words, it points to a host
>that can receive mail for a given domain, and really is beside the
>point here, as it only affects e-mail.
>
>The "A" record, is "forward" DNS, in other words its used to convert
>a domain name to an IP address.
>
>The "PTR" record is "reverse" DNS, which is used when converting an
>IP address into a name.
>
>Also, when setting up "reverse" (IP to name) DNS, you have to lay out
>the domain in a rather unusual way. If your IP is '192.168.0.1' then
>the reverse DNS would be set up as "1.0.168.192.in-addr.arpa" note
>that the numbers are in the reverse order from those of the IP address.
>
>If you're setting up DNS for the first time, I strongly suggest reading
>the book called "DNS and BIND" which is available from O'Reilly. It's
>designed for the UNIX name server (i.e. BIND, or Berkeley Internet Name
>Daemon) but is the "bible" for ISPs running DNS. The concepts that it
>explains apply to every DNS server, be it UNIX, NT or OS/400.
>
>
>
>On Wed, 5 Dec 2001, Jim Langston wrote:
>
> > DNS entries for machines have an MX and an A record.
> >
> > The MX stands for Mail Exchange. Not sure what the A
> > records stands for. One converts from the name to the
> > IP address, once converts from the IP address to the
> > name.
> >
> > If you can not do a reverse DNS lookup on specific
> > hosts, I would suspect they are missing one of these
> > records (I believe the A records is IP to Name).
> >
> > Try other IP addresses that you know have both records.
> > Here's a good example. In windows go to a DOS prompt.
> > type:
> > ping www.midrage.com
> > that tells us the IP address is 63.167.147.106.
> > then type:
> > ping -a 63.167.147.106
> > No name comes back. Looks like David doesn't have an
> > 'A' record for his DNS entry.
> >
> > If we do the same for www.microsoft.com:
> > ping www.microsoft.com (207.46.197.101)
> > ping -a 207.46.197.101 (microsoft.com)
> >
> > Microsoft does have an 'A' record associated with it's
> > DNS entry.
> >
> > Sorry for showing this in PC commands, not positive what
> > the AS/400 commands are (and my AS/400 isn't connected to
> > the internet anyway).
> >
> > Regards,
> >
> > Jim Langston
> >
> > -----Original Message-----
> > From: Scott Klement [mailto:klemscot@klements.com]
> > Sent: Tuesday, December 04, 2001 3:53 PM
> > To: rpg400-l@midrange.com
> > Subject: RE: Reverse DNS Lookup...
> >
> > I can't do reverse lookup on your "www.ctlaltdel.org" either. Not with
> > the program, not with the UNIX "host" command, not with the NSLOOKUP
> > command... it does not appear to have reverse DNS associated with it.
> >
> > The 216.115.108.245 does work from my AS/400, however.
> >
> > The other example (the one that you originally posted) is one that I
would
> > never use in production :) It may work some of the time, but it surely
> > will also fail some of the time. Really. Use the one that I posted, or
> > another one that's written correctly :)
> >
> >
> > On Tue, 4 Dec 2001, Andrew Borts wrote:
> >
> > > OK - Cut & pasted your results. Compiled (it compiled on the first
time
> > > - stop showing off!) and I still get blanks returned. I even tried
> > > using the example that Peter gave of 216.115.108.245 to do my lookup
> > > instead of my home server (www.ctlaltdel.org ) and STILL got blanks.
> > >
> > > I'm leaning toward setting up the DNS server on my AS/400 @ home, and
> > > trying the code there...
> > >
> > >
> > > Andrew Borts / Webmaster
>
>_______________________________________________
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