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  2. RPG400-L
  3. April 2005

RE: Passing multi occurrence DS pointer to procedure - Data out ofalignment

Hello,

When I'm in debug and eval the pointer of the multi occurrence DS and occurrence one and get different pointer value (see below). Is this normal?

EVAL %ADDR(MCRADD)
%ADDR(MCRADD) = SPP:CFFC819861042450
EVAL %ADDR(MCRADD(1))
%ADDR(MCRADD(1)) = SPP:CFFC819861041F50

The %occur() BIF or the OCCUR op-code can be used to set the ocurrance of a MODS. When the occurence is set to 1, the addresses should be the same. When the occurrence is set to 2, then %ADDR(MCRADD) shoudl equal %ADDR(MCRADD(2)). When the occurence is set to 3, then %ADDR(MCRADD) should match %ADDR(MCRADD(3)) and so on...

If you're passing the data to a subprocedure by pointer, make sure you set the occurrence to 1 before getting the address that you pass.

A much better alternative is to use data structure arrays INSTEAD OF multiple occurence data structures. Then you can declare the array on the prototype (instead of a pointer) so that it'll always be passed correctly.



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