closmg.f

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C> @file
C> @brief Close and write the current message to a BUFR file that was
C> previously opened for writing.
      
C> This subroutine closes the BUFR message that is currently open for
C> writing within internal arrays associated with logical unit
C> ABS(LUNIN), and it then writes the message to that logical unit.
C>
C> @authors J. Woollen
C> @authors D. Keyser
C> @date 1994-01-06
C>
C> @param[in] LUNIN -- integer: Absolute value is Fortran logical unit
C>                     number for BUFR file
C>
C> <p>Logical unit ABS(LUNIN) should have already been opened for output
C> operations via a previous call to subroutine openbf().
C>
C> <p>If LUNIN < 0, then any message containing zero data subsets will
C> not be written to logical unit ABS(LUNIN) for the remainder of the
C> life of the application program.  This includes suppressing the
C> writing of any dummy messages containing dump center and initiation
C> times that normally appear in the first 2 messages of NCEP dump files.
C>
C> <b>Program history log:</b>
C> | Date | Programmer | Comments |
C> | -----|------------|----------|
C> | 1994-01-06 | J. Woollen | Original author |
C> | 1998-07-08 | J. Woollen | Replaced call to Cray library routine "ABORT" with call to new internal routine bort(); modified to make Y2K compliant |
C> | 1999-11-18 | J. Woollen | The number of BUFR files which can be opened at one time increased from 10 to 32 (necessary in order to process multiple BUFR files under the MPI) |
C> | 2000-09-19 | J. Woollen | Maximum message length increased from 10,000 to 20,000 bytes |
C> | 2003-05-19 | J. Woollen | Corrected a bug which prevented the dump center and initiation time messages from being written out |
C> | 2003-11-04 | J. Ator  | Added documentation |
C> | 2003-11-04 | S. Bender | Added remarks and routine interdependencies |
C> | 2003-11-04 | D. Keyser | Unified/portable for WRF; added history documentation; outputs more complete diagnostic info when routine terminates abnormally |
C> | 2004-08-09 | J. Ator | Maximum message length increased from 20,000 to 50,000 bytes |
C> | 2005-05-26 | D. Keyser | Add LUNIN < 0 option to suppress writing of all future zero-subset messsages to ABS(LUNIN) |
C> | 2014-12-10 | J. Ator | Use modules instead of COMMON blocks |
C>
      SUBROUTINE closmg(LUNIN)

      USE moda_msgcwd
      USE moda_msglim
      USE moda_bitbuf

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

C  CHECK THE FILE STATUS
C  ---------------------

      lunit = abs(lunin)
      CALL status(lunit,lun,il,im)
      IF(lunit.NE.lunin) msglim(lun) = 0
      IF(il.EQ.0) goto 900
      IF(il.LT.0) goto 901
      IF(im.NE.0) THEN
         IF(nsub(lun).GT.0) THEN
            CALL msgwrt(lunit,mbay(1,lun),mbyt(lun))
         ELSE IF(nsub(lun).EQ.0.AND.nmsg(lun).LT.msglim(lun)) THEN
            CALL msgwrt(lunit,mbay(1,lun),mbyt(lun))
         ELSE IF(nsub(lun).LT.0) THEN
            CALL wrcmps(-lunit)
         ENDIF
      ENDIF
      CALL wtstat(lunit,lun,il,0)

C  EXITS
C  -----

      RETURN
900   CALL bort('BUFRLIB: CLOSMG - OUTPUT BUFR FILE IS CLOSED, IT '//
     . 'MUST BE OPEN FOR OUTPUT')
901   CALL bort('BUFRLIB: CLOSMG - OUTPUT BUFR FILE IS OPEN FOR '//
     . 'INPUT, IT MUST BE OPEN FOR OUTPUT')
      END