SUBROUTINE GETWIN(NODE,LUN,IWIN,JWIN)

C$$$  SUBPROGRAM DOCUMENTATION BLOCK
C
C SUBPROGRAM:    GETWIN (docblock incomplete)
C   PRGMMR: WOOLLEN          ORG: NP20       DATE: 1994-01-06
C
C ABSTRACT: THIS SUBROUTINE ....
C
C PROGRAM HISTORY LOG:
C 1994-01-06  J. WOOLLEN -- ORIGINAL AUTHOR
C 1998-07-08  J. WOOLLEN -- REPLACED CALL TO CRAY LIBRARY ROUTINE
C                           "ABORT" WITH CALL TO NEW INTERNAL BUFRLIB
C                           ROUTINE "BORT"
C 1999-11-18  J. WOOLLEN -- THE NUMBER OF BUFR FILES WHICH CAN BE
C                           OPENED AT ONE TIME INCREASED FROM 10 TO 32
C                           (NECESSARY IN ORDER TO PROCESS MULTIPLE
C                           BUFR FILES UNDER THE MPI)
C 2002-05-14  J. WOOLLEN -- REMOVED OLD CRAY COMPILER DIRECTIVES
C 2003-11-04  S. BENDER  -- ADDED REMARKS/BUFRLIB ROUTINE
C                           INTERDEPENDENCIES
C 2003-11-04  D. KEYSER  -- MAXJL (MAXIMUM NUMBER OF JUMP/LINK ENTRIES)
C                           INCREASED FROM 15000 TO 16000 (WAS IN
C                           VERIFICATION VERSION); UNIFIED/PORTABLE FOR
C                           WRF; ADDED DOCUMENTATION (INCLUDING
C                           HISTORY) (INCOMPLETE); OUTPUTS MORE
C                           COMPLETE DIAGNOSTIC INFO WHEN ROUTINE
C                           TERMINATES ABNORMALLY
C
C USAGE:    CALL GETWIN (NODE, LUN, IWIN, JWIN)
C   INPUT ARGUMENT LIST:
C     NODE     - INTEGER: ....
C     LUN      - INTEGER: I/O STREAM INDEX INTO INTERNAL MEMORY ARRAYS
C     IWIN     - INTEGER: ....
C     JWIN     - INTEGER: ....
C
C   OUTPUT ARGUMENT LIST:
C     IWIN     - INTEGER: ....
C     JWIN     - INTEGER: ....
C
C REMARKS:
C    THIS ROUTINE CALLS:        BORT     INVWIN   LSTRPC
C    THIS ROUTINE IS CALLED BY: CONWIN   UFBEVN   UFBIN3   UFBRW
C                               Normally not called by any application
C                               programs.
C
C ATTRIBUTES:
C   LANGUAGE: FORTRAN 77
C   MACHINE:  PORTABLE TO ALL PLATFORMS
C
C$$$

      INCLUDE 'bufrlib.prm'

      COMMON /USRINT/ NVAL(NFILES),INV(MAXJL,NFILES),VAL(MAXJL,NFILES)

      CHARACTER*128 BORT_STR
      REAL*8        VAL

C----------------------------------------------------------------------
C----------------------------------------------------------------------

      IRPC = LSTRPC(NODE,LUN)

      IF(IRPC.EQ.0) THEN
         IWIN = INVWIN(NODE,LUN,JWIN,NVAL(LUN))
         IF(IWIN.EQ.0 .and. jwin.gt.1) GOTO 100
         IWIN = 1
         JWIN = NVAL(LUN)
         GOTO 100
      ELSE
         IWIN = INVWIN(IRPC,LUN,JWIN,NVAL(LUN))
         IF(IWIN.EQ.0) THEN
            GOTO 100
         ELSEIF(VAL(IWIN,LUN).EQ.0.) THEN
            IWIN = 0
            GOTO 100
         ENDIF
      ENDIF

      JWIN = INVWIN(IRPC,LUN,IWIN+1,NVAL(LUN))
      IF(JWIN.EQ.0) GOTO 900

C  EXITS
C  -----

100   RETURN
900   WRITE(BORT_STR,'("BUFRLIB: GETWIN - SEARCHED BETWEEN",I5," AND"'//
     . ',I5,", MISSING BRACKET")') IWIN+1,NVAL(LUN)
      CALL BORT(BORT_STR)
      END