RE: Data Structures with Structures

["Njal Fisketjon" <n.f@xxxxxxx>]

SCarter wrote:

> I know this is really long but I wanted to let you know what I am dealing
> with here.
> I have this very large array it looks like a three level 
> structure  where a
> file is read and fills out the top level then each of the FORMATxx fields
> are used
> to read a different record  and fill out the second level and again the
> FORMATxx records on this level are used to read the file and fill out the
> last level.
> What I am trying to see is there a more intuitive way of performing the
> same function without getting into things like recursion.....
> 
> D DATA            DS
> D  PARMS                              DIM(10)
> D   CO1                        580    OVERLAY(PARMS:1  )
> D     FSCOA                      2    OVERLAY(CO1:1)
> D     FSCOA#                     2  0 OVERLAY(CO1:1)
> D     FSBRA                      1    OVERLAY(CO1:3)
> D     FSCOBRA#                   3  0 OVERLAY(CO1:3)
> D     FORMATA                   10    OVERLAY(CO1:5)

Something strange about the defs. above; is the length of FSCOBRA# correct 
(should it be 2  0?) or is perhaps the OVERLAY start position wrong for that 
subfield?

To the above DS I would add

SUBS_Offset   5  0 dim(11)
Subs_Count    2  0 dim(11)


and define the following "stand-alone" DS

> D     SUBS                            
> D      SUBSCO1                   2    OVERLAY(SUBS:1)
> D      SUBSCO1#                  2  0 OVERLAY(SUBS:1)
> D      SUBSBR1                   1    OVERLAY(SUBS:3)
> D      SUBCBR1                   3    OVERLAY(SUBS:1)
> D      SUBFMT1                  10    OVERLAY(SUBS:4   )

Then I would use a pointer to add the content of SUBS to DATA/PARMS before
filling the next SUBS entry, updating the SUBS_Offset anf SUBS_Count arrays
along the way.



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