MODULE stpctl
   !!======================================================================
   !!                       ***  MODULE  stpctl  ***
   !! Ocean run control :  gross check of the ocean time stepping
   !!                      version for standalone surface scheme
   !!======================================================================
   !! History :  OPA  ! 1991-03  (G. Madec) Original code
   !!            6.0  ! 1992-06  (M. Imbard)
   !!            8.0  ! 1997-06  (A.M. Treguier)
   !!   NEMO     1.0  ! 2002-06  (G. Madec)  F90: Free form and module
   !!            2.0  ! 2009-07  (G. Madec)  Add statistic for time-spliting
   !!            3.5  ! 2012-03  (S. Alderson)
   !!----------------------------------------------------------------------

   !!----------------------------------------------------------------------
   !!   stp_ctl      : Control the run
   !!----------------------------------------------------------------------
   USE oce             ! ocean dynamics and tracers variables
   USE dom_oce         ! ocean space and time domain variables 
   USE in_out_manager  ! I/O manager
   USE lbclnk          ! ocean lateral boundary conditions (or mpp link)
   USE lib_mpp         ! distributed memory computing

   IMPLICIT NONE
   PRIVATE

   PUBLIC stp_ctl           ! routine called by step.F90
   !!----------------------------------------------------------------------
   !! NEMO/OPA 3.3 , NEMO Consortium (2010)
   !! $Id: stpctl.F90 2355 2015-05-20 07:11:50Z ufla $
   !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt)
   !!----------------------------------------------------------------------

CONTAINS

   SUBROUTINE stp_ctl( kt, kindic )
      !!----------------------------------------------------------------------
      !!                    ***  ROUTINE stp_ctl  ***
      !!                     
      !! ** Purpose :   Control the run
      !!
      !! ** Method  : - Save the time step in numstp
      !!              - Print it each 50 time steps
      !!
      !! ** Actions :   'time.step' file containing the last ocean time-step
      !!                
      !!----------------------------------------------------------------------
      INTEGER, INTENT( in ) ::   kt         ! ocean time-step index
      INTEGER, INTENT( inout ) ::   kindic  ! indicator of solver convergence
      !!----------------------------------------------------------------------

      IF( kt == nit000 .AND. lwp ) THEN
         WRITE(numout,*)
         WRITE(numout,*) 'stp_ctl : time-stepping control'
         WRITE(numout,*) '~~~~~~~'
         ! open time.step file
         CALL ctl_opn( numstp, 'time.step', 'REPLACE', 'FORMATTED', 'SEQUENTIAL', -1, numout, lwp, narea )
      ENDIF

      IF(lwp) WRITE ( numstp, '(1x, i8)' )   kt      !* save the current time step in numstp
      IF(lwp) REWIND( numstp )                       !  --------------------------

   END SUBROUTINE stp_ctl

   !!======================================================================
END MODULE stpctl