RE: problem passing a MODS

In the case I presented, the called program that loads the mods does not reset the occurrence to 1. This is a converted RPGIII.

I cannot remember why one cannot just pass a mods as a parameter between rpgIV programs as one could with RPGIII. To encapsulate the original RPGIII,
this was used as a parameter between the rpgIV receiving the mods and the rpgIII sending the mods :

D MYSP B
d parmMods like(ref_mods)
D Error

Notice it is not a DS at all, it is a character field with the same length as the mods.

I am just guessing but this is what is happening to my program :

First call to mysp : parmmods points to mymods(1) in the caller so all ends ok.
second call parmmods points to mymods(last_used_occurence) - rpgIII modifies 20 occurrences starting from that position and overflows into position occupied by the parameter Error.

-----Message d'origine-----
De : rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] De la part de Rory Hewitt
Envoyé : mercredi 23 février 2011 01:52
À : RPG programming on the IBM i / System i
Objet : Re: problem passing a MODS

RPGIII...

On Tue, Feb 22, 2011 at 4:21 PM, Jon Paris
<jon.paris@xxxxxxxxxxxxxx> wrote:

On Feb 22, 2011, at 7:05 PM, rpg400-l-request@xxxxxxxxxxxx wrote:

A quick question that occurred to me:

If I define a MODS in one program, set the occurrence to

1 and pass

it to

a

second program and that called program then loads the MODS with
data,

does

the called program need to reset the occurrence to 1 before
returning to

the

calling program?

Interesting question. Honest answer is I don't know for certain.
Although it is a pointer to the storage of the original variable I
would think that it is a copy of the original pointer is

being passed.

Haven't got time to play or I'd test it. But why not avoid

the whole

mess and use a DS array instead of a MODS anyway?


Jon P.
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