SUBROUTINE run_control

!------------------------------------------------------------------------------!
! Current revisions:
! -----------------
! 
!
! Former revisions:
! -----------------
! $Id: run_control.f90 484 2010-02-05 07:36:54Z witha $
!
! 97 2007-06-21 08:23:15Z raasch
! Timestep and z_i format changed
!
! 87 2007-05-22 15:46:47Z raasch
! var_hom renamed pr_palm
!
! 82 2007-04-16 15:40:52Z raasch
! Preprocessor strings for different linux clusters changed to "lc",
! routine local_flush is used for buffer flushing
!
! RCS Log replace by Id keyword, revision history cleaned up
!
! Revision 1.20  2006/06/02 15:23:47  raasch
! cpp-directives extended for lctit
!
! Revision 1.1  1997/08/11 06:25:38  raasch
! Initial revision
!
!
! Description:
! ------------
! Computation and output of run-control quantities
!------------------------------------------------------------------------------!

    USE cpulog
    USE indices
    USE interfaces
    USE pegrid
    USE statistics
    USE control_parameters

    IMPLICIT NONE

    CHARACTER (LEN=1) ::  change_chr, disturb_chr

!
!-- If required, do statistics
    IF ( .NOT. flow_statistics_called )  CALL flow_statistics

!
!-- Flow_statistics has its own cpu-time measurement
    CALL cpu_log( log_point(11), 'run_control', 'start' )

!
!-- Output
    IF ( myid == 0 )  THEN

!
!--    Check, whether file unit is already open (may have been opened in header
!--    before)
       CALL check_open( 15 )

!
!--    If required, write header
       IF ( .NOT. run_control_header )  THEN
          WRITE ( 15, 100 )
          run_control_header = .TRUE.
       ENDIF

!
!--    Output the the beginning of the run receives no information about an
!--    Euler-timestep
       IF ( dt_changed  .AND.  simulated_time /= 0.0  .AND. &
            timestep_scheme(1:5) /= 'runge' )  THEN
          IF ( timestep_scheme == 'leapfrog' )  THEN
             change_chr = 'L'
          ELSE
             change_chr = 'E'
          ENDIF
       ELSE
          change_chr = ' '
       ENDIF
!
!--    If required, set disturbance flag
       IF ( disturbance_created )  THEN
          disturb_chr = 'D'
       ELSE
          disturb_chr = ' '
       ENDIF
       WRITE ( 15, 101 )  runnr, current_timestep_number, simulated_time_chr,  &
                          simulated_time-INT( simulated_time ), dt_3d,         &
                          timestep_reason, change_chr, u_max, disturb_chr,     &
                          v_max, disturb_chr, w_max, hom(nzb,1,pr_palm,0),     &
                          hom(nzb+8,1,pr_palm,0), hom(nzb+3,1,pr_palm,0),      &
                          hom(nzb+6,1,pr_palm,0), hom(nzb+4,1,pr_palm,0),      &
                          hom(nzb+5,1,pr_palm,0), hom(nzb+9,1,pr_palm,0),      &
                          hom(nzb+10,1,pr_palm,0), u_max_ijk(1:3),             &
                          v_max_ijk(1:3), w_max_ijk(1:3),                      &
                          advected_distance_x/1000.0,                          &
                          advected_distance_y/1000.0, mgcycles
!
!--    Write buffer contents to disc immediately
       CALL local_flush( 15 )

    ENDIF
!
!-- If required, reset disturbance flag. This has to be done outside the above 
!-- IF-loop, because the flag would otherwise only be reset on PE0
    IF ( disturbance_created )  disturbance_created = .FALSE.

    CALL cpu_log( log_point(11), 'run_control', 'stop' )

!
!-- Formats
100 FORMAT (///'Run-control output:'/ &
              &'------------------'// &
          &'RUN  ITER. HH:MM:SS.SS    DT(E)     UMAX     VMAX     WMAX     U', &
          &'*    W*   THETA*    Z_I     ENERG.   DISTENERG    DIVOLD     DIV', &
          &'NEW     UMAX(KJI)    VMAX(KJI)    WMAX(KJI)   ADVECX   ADVECY   ', &
          &'MGCYC'/                                                            &
          &'----------------------------------------------------------------', &
          &'----------------------------------------------------------------', &
          &'----------------------------------------------------------------', &
          &'-----')
101 FORMAT (I3,1X,I6,1X,A8,F3.2,1X,F8.4,A1,A1,F8.4,A1,F8.4,A1,F8.4,2X,F5.3,2X, &
            F4.2, &
            2X,F6.3,2X,F6.0,1X,4(E10.3,1X),3(3(I4),1X),F8.3,1X,F8.3,5X,I3)

 END SUBROUTINE run_control