RE: o specs in sub procedure

[Joel Fritz <JFritz@xxxxxxxxxxxxxxxx>]

I think the easiest thing to do here is an externally described print file.
Once I remembered I had Code Designer, it didn't seem so awful. <g>

I could have used global variables and done it in a subroutine.  I'm trying
to force myself to use subprocedures more, regardless of whether they're
appropriate. <g> 

 

> -----Original Message-----
> From: Scott Klement [mailto:klemscot@xxxxxxxxxxxx]
> Sent: Monday, March 10, 2003 4:01 PM
> To: RPG programming on the AS400 / iSeries
> Subject: Re: o specs in sub procedure
> 
> 
> 
> On Mon, 10 Mar 2003, Joel Fritz wrote:
> >
> > The from value comes from a data structure defined in the 
> procedure.  It
> > looks like the O specs want global variables.  That makes 
> sense.  Seems like
> > overkill to write a print file.  I can also define a global 
> variable used
> > only in the file update procedure.  That doesn't really 
> excite me either.
> >
> >
> 
> Yes, files in RPG are global.   You need to use global 
> variables if you
> want to write data to them.
> 
> Here are a few thoughts:
> 
> 1)  You could just have *one* global variable for printer output.   A
>       string defined as 132A (for example) would work nicely.   Then
>       populate it from your data structure with statements like:
> 
>         eval  printme = *blanks
>         eval  %subst(printme: 1) = %editc(ds_value1: 'L')
>         eval  %subst(printme: 10) = %editc(ds_value2: 'M')
> 
>       This is *almost* like having o-specs in your subprocedure.
>       Of course, you'll want to do an EXCEPT once all of the fields
>       have been populated.
> 
> 
> 2) use a service program or module that's just for printing.  Since
>       global variables are global to the *module (as opposed to the
>       entire program) you are restricting the variables to just the
>       one procedure.   (This is awkward IMHO, but it's a thought)
> 
> 3) use the ILE C routines to create files that *are* local to your
>       subprocedure.  (This is probably too much work and/or too much
>       of a learning curve -- but I thought I'd throw it out there)
> 
> 4) write the output to a stream file instead of a spooled file.
>       Of course, then it doesn't print without you doing extra work,
>       but sometimes this is useful, like if the user wants to just
>       grab the file and open it in notepad or something, and then
>       print it from there...
> 
> I guess a lot depends on the application and/or why you don't want to
> use global variables.
> 
> 
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