ESMF_ClockIsReverse Function

      function ESMF_ClockIsReverse(clock, keywordEnforcer, rc)
!
! !RETURN VALUE:
      logical :: ESMF_ClockIsReverse

! !ARGUMENTS:
      type(ESMF_Clock), intent(in)            :: clock
      type(ESMF_KeywordEnforcer), optional:: keywordEnforcer ! must use keywords below
      integer,          intent(out), optional :: rc

!
! !STATUS:
! \begin{itemize}
! \item\apiStatusCompatibleVersion{5.2.0r}
! \end{itemize}
!
! !DESCRIPTION:
!     Returns true if clock is in {\tt ESMF\_DIRECTION\_REVERSE}, and false if
!     in {\tt ESMF\_DIRECTION\_FORWARD}.  Allows convenient use in "if" and
!     "do while" constructs.  Alternative to
!     {\tt ESMF\_ClockGet(...direction=...)}.
!
!     The arguments are:
!     \begin{description}
!     \item[clock]
!          The object instance to check.
!     \item[{[rc]}]
!          Return code; equals {\tt ESMF\_SUCCESS} if there are no errors.
!     \end{description}
!EOP
! !REQUIREMENTS:
!     TMG3.4.6
      integer :: localrc                        ! local return code

      ! Assume failure until success
      if (present(rc)) rc = ESMF_RC_NOT_IMPL
      localrc = ESMF_RC_NOT_IMPL

      ! Initialize output value in case of error
      ESMF_ClockIsReverse = .false.

      ! check input
      ESMF_INIT_CHECK_DEEP(ESMF_ClockGetInit,clock,rc)

      ! invoke C to C++ entry point
      call c_ESMC_ClockIsReverse(clock, ESMF_ClockIsReverse, localrc)
      if (ESMF_LogFoundError(localrc, ESMF_ERR_PASSTHRU, &
        ESMF_CONTEXT, rcToReturn=rc)) return

      ! Return success
      if (present(rc)) rc = ESMF_SUCCESS
      end function ESMF_ClockIsReverse