Re: Procedure Problem -- RPG400-L

One way to go would be using a varying lengt field - the actual field length is sort of a "built-in" length parameter and is easily retrieved in the subprocedure:

     **-- Compilation spec: -------------------------------------------------**
     **
     **   CrtRpgMod Module( FNC031MR )
     **   CrtSrvPgm Srvpgm( FNC031S ) Module( FNC031MR ) Export( *ALL )
     **
     **   CrtBndDir BndDir( FNC031B ) Text( 'General Functions Directory' )
     **   AddBndDirE BndDir( FNC031B ) Obj(( FNC031S *SRVPGM ))
     **
     **-- Control spec: -----------------------------------------------------**
     H NoMain Option( *SrcStmt )
     **-- Center (leftadjusted) string: -------------------------------------**
     D Center          Pr           256a   Varying
     D CntStr                      256a   Varying Value
     **-- Check Reverse: ----------------------------------------------------**
     D CheckR          Pr             5u 0
     D CrArg                         1a   Const
     D CrString                    256a   Const
     **-- Center string: ----------------------------------------------------**
     P Center          B                   Export
     D                 Pi           256a   Varying
     D CntStr                      256a   Varying Value
     **
     D Blanks          s            128a

     C                   Return    %SubSt( Blanks
     C                                   : 1
     C                                   : %Int(( %Len( CntStr ) -
     C                                     CheckR( ' ': CntStr )) / 2 )
     C                                   ) + CntStr
     **
     P Center          E
     **-- Check Reverse: ----------------------------------------------------**
     P CheckR          B                   Export
     D                 Pi             5u 0
     D CrArg                         1a   Const
     D CrString                    256a   Const
     **
     D Pos             S              5u 0
     **-- Check Reverse: ----------------------------------------------------**
     **
     C     CrArg         CheckR    CrString      Pos
     C                   If        Pos        = *Zero
     C                   Return    1
     C                   Else
     C                   Return    Pos
     C                   EndIf
     **
     P CheckR          E

     **-- Compilation spec: -------------------------------------------------**
     **
     **   CrtRpgMod Module( FNC032MR ) DbgView( *LIST )
     **   CrtPgm    Pgm( FNC032I )     Module( FNC032MR ) ActGrp( QILE )
     **
     **-- Control spec: -----------------------------------------------------**
     H BndDir( 'FNC031B' ) Option( *SrcStmt )
     **-- Global variables: -------------------------------------------------**
     D Field           S             64a   Inz('Mark Spitz' )
     D DspFld          S             32a
     D PrtFld          S            128a
     **-- Center (leftadjusted) string: -------------------------------------**
     D Center          Pr           256a   Varying
     D CntStr                      256a   Varying Value
     **
     **-- Sample: -----------------------------------------------------------**
     **
     C                   Eval      Field      = Center( Field )
     **
     C                   Eval      Field      = %TrimL( Field )

     C                   Eval      DspFld     = Center( %SubSt( Field
     C                                                         : 1
     C                                                         : %Size( DspFld )
     C                                                         ))
     **

     C                   Eval      PrtFld     = %TrimL( Field )
     C                   Eval      PrtFld     = Center( PrtFld )
     **
     C                   Return
     **

As you can see in the last example, it won't really solve the problem Jon mentioned about being able to set the length of the receiver variable, if that is bigger than the source variable; I have to copy the string to the receiver and use that as input to make it work.

Best regards,

Carsten Flensburg

----- Original Message -----

From: Ron Hawkins

To: RPG400-L@midrange.com

Sent: Friday, December 24, 1999 7:28 PM

Subject: RE: Procedure Problem

You put the data to be centered in a field and pass the field. It returns it centered. You shouldn't have to tell the procedure the length of the field, it can figure it out.