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Why not using a coding schema and then generate the code to
handle the evals and selects. The program logic is apart.
E.g:
d ds126    E DS   prefix(P126)
d p126fileda        <--- Expanded 
d p126filedb        <--- Expanded 

c  r126    begsr
c          eval   fileda=p126fileda
c          eval   filedb=p126filedb
c....
c          endsr

Break down the select using single digits test like:
c          select
c          when   %substr(%editc(n:'Z'):1:1)='0'
c          exsr   d10
c.....
c          endsl

Extracting the common fields across ds is not a big
problem.
Just an idea
Marco
--- Buck Calabro <Buck.Calabro@xxxxxxxxxxxx> wrote:
> Duane wrote:
> 
> >  I'm going to assume that each field is always the 
> >same size, no matter where it sits in your flat file.
> 
> Yes, that's the case.
> 
> >...don't put your fields in a data structure
> >at all.  Make each of them based.  Set up a structure of
>  
> >pointers that each field is based on.  Set up an array 
> >with groups of pointers, with the addresses of each
> layout 
> >already set up.  For each record type, move in the
> >correct set of pointers, and you're ready to go.
> 
> 
> Very innovative, thanks Duane!  I was hoping to avoid all
> the explicit moves
> (here, evals or possibly D spec INZ operations) but it
> looks like that's
> unavoidable.
>   --buck
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