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  • Subject: RE: PR definition for READLINK()
  • From: Jon.Paris@xxxxxx
  • Date: Thu, 17 Aug 2000 10:02:27 -0400


Peter, if you modify the proto as shown below you can avoid some work and
make the thing simpler for others to follow.  In my experience many people
go glassy-eyed at the sight of a %Addr.  For the first parm you can specify
*STRING which will allow you to specify a field name and let the compiler
do the work. You have no choice but to pass a pointer for the second parm
since the content will be modified, but passing a pointer by value and a
field name by reference are equivalent so ......  After all, why do more
work than you need - let the compiler do it!


 Dreadlink         PR            10I 0 EXTPROC('readlink')
 D                                 *   VALUE OPTIONS(*STRING)
 D                             2000A   OPTIONS(*VARSIZE)
 D                               10I 0 VALUE

 D SymName         S             50A
 D Path            S            256
 D ReturnInt       S             10I 0
  *----------------------------------------------------------------*
 C     *Entry        Plist
 C                   Parm                    SymName
 C                   Eval      ReturnInt = readlink(SymName : Path
 C                                                 :%size(Path))

Jon Paris

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