Re: Procedure parameter with VALUE option

["Peter Dow" <pcdow@xxxxxxxxx>]

Thanks, Barbara.



----- Original Message -----
From: <bmorris@ca.ibm.com>
Sent: Monday, December 17, 2001 7:50 AM
Subject: Re: Procedure parameter with VALUE option


> >Although I'm still curious -- does VALUE conversion include size as well
> >as type?  If I'm passing 128 bytes (not varying) to a 32K parameter (also
> >not varying), will it place 32K on the stack (the 128 bytes + blanks)?
>
> The parameter gets put on the stack exactly as you coded it in your
> prototype.  Since it's not VARYING, it will be 128 bytes + blanks.  Just
> keep in mind that EVAL rules are used to "assign" a passed parameter
> to the prototyped parameter.  If EVAL would add blanks, then so will
> parameter passing.
>
> >
> >d Data            s          32766a   varying
> > ...
> >c                                          %addr(Data) + 2:
> > ...
> >Note the "+ 2" to skip the embedded length.  Will this get me in trouble
> >in the future?  Is it possible IBM will decide to increase the length to
> >4 bytes?
>
> That will continue to work.  Even if we someday extended the length,
> it would be optional, defaulting to 2, and requiring a code change in
> the RPG source to get the new length.



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