Arguments

 

context

   OpenVMS usage:context
   type:         longword (unsigned)
   access:       write only
   mechanism:    by reference
   Value identifying the data stream that DCX$COMPRESS_INIT
   initializes. The context argument is the address of a longword
   containing this value. You should not modify the context value
   after DCX$COMPRESS_INIT initializes it. You can define multiple
   context arguments to identify multiple data streams that are
   processed simultaneously.
 

map

   OpenVMS usage:address
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference
   The function created by DCX$MAKE_MAP. The map argument is the
   address of the compression/expansion function's virtual address.

   The map argument must remain at this address until data
   compression is completed and the context is deleted by means
   of a call to DCX$COMPRESS_DONE.