Re: passing numeric data

This is an interesting question.  

RPG IV can both receive and pass zoned decimal parameters directly.
I'd think that this would solve your problem.

If for some odd reason you MUST be able to handle both zoned and packed
data, you could do it with pointers...    Its a lot of horsing around, but
it SHOULD work.   Theres an example of doing this at the bottom of this
message.  

Have Fun :)

On Wed, 8 Mar 2000, Sam wrote:

> Hi,
> Has anyone had experience with writing new RPG IV code and having to call it
> from RPG II programs?!?  There is a problem passing numeric data from an RPG
> II program, which stores everything internally as zoned while new RPG
> defaults to packed.  When I have RPG IV programs I want to call from both
> RPG IV and RPG II, I end up defining (and sometimes redefining) everything
> as zoned.  Sometimes I have to redefine a field I want to pass just so it
> matches wat the called program is expecting.  Is there any easy way around
> this drawback of interfacing the 2 versions of the same language?  I know
> one solution is to convert the RPG II but this client doesn't want to make
> the effort.
> TIA
> Sam Kanakanui



      ** Example of a program that auto-discriminates between
      **   packed and zoned numeric parameters.
      **
     D p_packed1       S               *   INZ(*NULL)
     D p_packed2       S               *   INZ(*NULL)
     D Packed1         S              7P 0 based(p_packed1)
     D Packed2         S              7P 0 based(p_packed2)

     D p_zoned1        S               *   INZ(*NULL)
     D p_zoned2        S               *   INZ(*NULL)
     D Zoned1          S              7S 0 based(p_zoned1)
     D Zoned2          S              7S 0 based(p_zoned2)

     D                 DS
     D  E_Val                  1      2U 0 INZ(0)
     D  C_Val                  2      2A

     c     *entry        plist
     c                   parm                    parm1             1
     c                   parm                    parm2             2

     C* if the EBCDIC value of the first byte in parm1
     C* is F0 or higher, it must be zoned:
     C*
     c                   eval      C_Val = parm1
     c                   if        E_Val > 239
     c                   eval      p_zoned1 = %addr(parm1)
     c                   else
     c                   eval      p_packed1 = %addr(parm1)
     c                   endif

     C* if the EBCDIC value of the first byte in parm2
     C* is F0 or higher, it must be zoned:
     C*
     c                   eval      C_Val = parm2
     c                   if        E_Val > 239
     c                   eval      p_zoned2 = %addr(parm2)
     c                   else
     c                   eval      p_packed2 = %addr(parm2)
     c                   endif

     C*
     C*  Example of how to know which variable to use,
     C*     In this example, we're just displaying the values
     C*     of parm1 & parm2:
     C*
     c                   if        p_zoned1 = *NULL
     c     'Parm1'       dsply                   packed1
     c                   else
     c     'Parm1'       dsply                   zoned1
     c                   endif

     c                   if        p_zoned2 = *NULL
     c     'Parm2'       dsply                   packed2
     c                   else
     c     'Parm2'       dsply                   zoned2
     c                   endif


     c                   eval      *inlr = *on
     c                   return




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