nemdefs.f

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C> @file
C> @brief Get the element name and units associated with a
C> Table B mnemonic.

C> Given a Table B mnemonic defined in the
C> [DX BUFR Tables](@ref dfbftab) associated with a BUFR file
C> (or in the [master BUFR tables](@ref dfbfmstab), if the file
C> was opened in subroutine openbf() with IO = 'SEC3'), this
C> subroutine returns the element name and units associated
C> with that mnemonic.
C>
C> @author J. Ator
C> @date 2014-10-02
C>
C> @param[in] LUNIT  - integer: Fortran logical unit number for
C>                     BUFR file
C> @param[in] NEMO   - character*(*): Table B mnemonic
C> @param[out] CELEM - character*55: Element name associated
C>                     with NEMO
C> @param[out] CUNIT - character*24: Units associated with NEMO
C> @param[out] IRET  - integer: return code
C>                     - 0 = normal return
C>                     - -1 = NEMO could not be found, or some
C>                            other error occurred
C>
C> <p>Logical unit LUNIT should have already been opened for
C> input or output operations via a previous call to subroutine
C> openbf().
C>
C> <b>Program history log:</b>
C> - 2014-10-02  J. Ator    -- Original version
C> - 2014-12-10  J. Ator    -- Use modules instead of COMMON blocks
C>
    SUBROUTINE nemdefs ( LUNIT, NEMO, CELEM, CUNIT, IRET )

    USE moda_tababd

    CHARACTER*1   tab

    CHARACTER*(*) nemo, celem, cunit

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

    iret = -1

C   Get LUN from LUNIT.

    CALL status( lunit, lun, il, im )
    IF ( il .EQ. 0 ) RETURN

C   Find the requested mnemonic in the internal Table B arrays.

    CALL nemtab( lun, nemo, idn, tab, iloc )
    IF ( ( iloc .EQ. 0 ) .OR. ( tab .NE. 'B' ) ) RETURN

C   Get the element name and units of the requested mnemonic.

    celem = ' '
    ls = min(len(celem),55)
    celem(1:ls) = tabb(iloc,lun)(16:15+ls)

    cunit = ' '
    ls = min(len(cunit),24)
    cunit(1:ls) = tabb(iloc,lun)(71:70+ls)

    iret = 0

    RETURN
    END