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PRSINI

       SUBROUTINE  PRSINI (INTTY,OUTTTY,TMPFIL)
 C$    (Parse - Initialization)
 C$    This routine takes care of all initializations required  by
 C$    the parsing package.   It should  be called  only once  for
 C$    each pair of files  to be processed,  and before any  other
 C$    routine in  the  package  is used.   Since  an  interactive
 C$    parsing activity  requires  both  input  and  output  files
 C$    directed to  the same  terminal, the  first two  arguments,
 C$    INTTY and  OUTTTY, supply  FORTRAN  unit numbers  for  that
 C$    purpose.  If the host system permits both input and  output
 C$    to the same unit  number, they need  not be distinct.   The
 C$    third argument, TMPFIL, is a unit number which can be  used
 C$    for temporary input of an indirect command file.  It can be
 C$    supported  only  if  the  host  operating  system   permits
 C$    run-time association  of  files  with  unit  numbers,  plus
 C$    opening and closing them.  If  TMPFIL is 0, any attempt  to
 C$    use an indirect command file  will return a parsing  syntax
 C$    error.
 C$    (28-NOV-82)