#include "w3macros.h"
!/ ------------------------------------------------------------------- /
      MODULE W3SBTXMD
!/
!/                  +-----------------------------------+
!/                  | WAVEWATCH III           NOAA/NCEP |
!/                  |           H. L. Tolman            |
!/                  |                        FORTRAN 90 |
!/                  | Last update :         29-May-2009 |
!/                  +-----------------------------------+
!/
!/    20-Dec-2004 : Origination.                        ( version 3.06 )
!/    23-Jun-2006 : Formatted for submitting code for   ( version 3.09 )
!/                  inclusion in WAVEWATCH III.
!/    29-May-2009 : Preparing distribution version.     ( version 3.14 )
!/
!/    Copyright 2009 National Weather Service (NWS),
!/       National Oceanic and Atmospheric Administration.  All rights
!/       reserved.  WAVEWATCH III is a trademark of the NWS. 
!/       No unauthorized use without permission.
!/
!  1. Purpose :
!
!     Dummy slot for bottom friction source term.
!        This module can be used to include user-defined source term(s),
!     or to submit a source term to be included into the WAVEWATCH III
!     distribution. See section 5 for requirements for submissions.
!        Codes may be included in WAVEWATCH III as a standard option
!     with it's own dedicated compile switch, or as a version of this
!     module that can be plugged in by a user.
!
!  2. Variables and types :
!
!      Name      Type  Scope    Description
!     ----------------------------------------------------------------
!     ----------------------------------------------------------------
!
!  3. Subroutines and functions :
!
!      Name      Type  Scope    Description
!     ----------------------------------------------------------------
!      W3SBTX    Subr. Public   User supplied linear input.
!      INSBTX    Subr. Public   Corresponding initialization routine.
!     ----------------------------------------------------------------
!
!  4. Subroutines and functions used :
!
!      Name      Type  Module   Description
!     ----------------------------------------------------------------
!      STRACE    Subr. W3SERVMD Subroutine tracing.
!     ----------------------------------------------------------------
!
!  5. Remarks :
!
!     WAVEWATCH III is designed as a highly plug-compatible code.
!     Source term modules can be included as self-contained modules,
!     with limited changes needed to the interface of routine calls
!     in W3SRCE, and in the point postprocessing programs only.
!     Codes submitted for inclusion in WAVEWATCH III should be
!     self-contained in the way described below, and might be
!     provided with distributions fully integrated in the data
!     structure, or as an optional version of this module to be
!     included by the user.
!
!     Rules for preparing a module to be included in or distributed
!     with WAVEWATCH III :
!
!      - Fully document the code following the outline given in this
!        file, and according to all other WAVEWATCH III routines.
!      - Provide a file with necessary modifications to W3SRCE and
!        all other routines that require modification.
!      - Provide a test case with expected results.
!      - It is strongly recommended that the programming style used
!        in WAVEWATCH III is followed, in particular 
!          a) for readability, write as if in fixed FORTRAN format 
!             regarding column use, even though all files are F90
!             free format.
!          b) I prefer upper case programming for permanent code,
!             as I use lower case in debugging and temporary code.
!
!     This module needs to be self-contained in the following way.
!
!      a) All saved variables connected with this source term need
!         to be declared in the module header. Upon acceptance as
!         permanent code, they will be converted to the WAVEWATCH III
!         dynamic data structure.  
!      b) Provide a separate computation and initialization routine.
!         In the submission, the initialization should be called
!         from the computation routine upon the first call to the
!         routine. Upon acceptance as permanent code, the
!         initialization routine will be moved to a more appropriate
!         location in the code (i.e., being absorbed in ww3_grid or
!         being moved to W3IOGR). 
!
!     See notes in the file below where to add these elements.
!
!  6. Switches :
!
!     !/S  Enable subroutine tracing.
!
!  7. Source code :
!/
!/ ------------------------------------------------------------------- /
!/
!     *****************************************
!     ***    Declare saved variables here   ***
!     ***  public or private as appropriate ***
!     *****************************************
!
      PUBLIC
!/
      CONTAINS
!/ ------------------------------------------------------------------- /
      SUBROUTINE W3SBTX
!/
!/                  +-----------------------------------+
!/                  | WAVEWATCH III           NOAA/NCEP |
!/                  |           H. L. Tolman            |
!/                  |                        FORTRAN 90 |
!/                  | Last update :         23-Jun-2006 |
!/                  +-----------------------------------+
!/
!/    20-Dec-2004 : Origination.                        ( version 3.06 
!/    23-Jun-2006 : Formatted for submitting code for   ( version 3.09 )
!/                  inclusion in WAVEWATCH III.
!/
!  1. Purpose :
!
!     Dummy slot for bottom friction source term.
!
!  2. Method :
!
!  3. Parameters :
!
!     Parameter list
!     ----------------------------------------------------------------
!     ----------------------------------------------------------------
!
!  4. Subroutines used :
!
!      Name      Type  Module   Description
!     ----------------------------------------------------------------
!      STRACE    Subr. W3SERVMD Subroutine tracing.
!     ----------------------------------------------------------------
!
!  5. Called by :
!
!      Name      Type  Module   Description
!     ----------------------------------------------------------------
!      W3SRCE    Subr. W3SRCEMD Source term integration.
!      W3EXPO    Subr.   N/A    Point output post-processor.
!      GXEXPO    Subr.   N/A    GrADS point output post-processor.
!     ----------------------------------------------------------------
!
!  6. Error messages :
!
!       None.
!
!  7. Remarks :
!
!  8. Structure :
!
!     See source code.
!
!  9. Switches :
!
!     !/S  Enable subroutine tracing.
!
! 10. Source code :
!
!/ ------------------------------------------------------------------- /
      USE W3ODATMD, ONLY: NDSE
      USE W3SERVMD, ONLY: EXTCDE
!/S      USE W3SERVMD, ONLY: STRACE
!/
      IMPLICIT NONE
!/
!/ ------------------------------------------------------------------- /
!/ Parameter list
!/
!/
!/ ------------------------------------------------------------------- /
!/ Local parameters
!/
!/S      INTEGER, SAVE           :: IENT = 0
      LOGICAL, SAVE           :: FIRST = .TRUE.
!/
!/ ------------------------------------------------------------------- /
!/
!/S      CALL STRACE (IENT, 'W3SBTX')
!
! 0.  Initializations ------------------------------------------------ *
!
!     **********************************************************
!     ***    The initialization routine should include all   ***
!     *** initialization, including reading data from files. ***
!     **********************************************************
!
      IF ( FIRST ) THEN
          CALL INSBTX
          FIRST  = .FALSE.
        END IF
!
! 1.  .... ----------------------------------------------------------- *
!
      WRITE (NDSE,*)
      WRITE (NDSE,*) ' *** ROUTINE W3SBTX NOT YET AVAILABLE *** '
      WRITE (NDSE,*)
      CALL EXTCDE ( 99 )
!/
!/ End of W3SBTX ----------------------------------------------------- /
!/
      END SUBROUTINE W3SBTX
!/ ------------------------------------------------------------------- /
      SUBROUTINE INSBTX
!/
!/                  +-----------------------------------+
!/                  | WAVEWATCH III           NOAA/NCEP |
!/                  |           H. L. Tolman            |
!/                  |                        FORTRAN 90 |
!/                  | Last update :         23-Jun-2006 |
!/                  +-----------------------------------+
!/
!/    23-Jun-2006 : Origination.                        ( version 3.09 )
!/
!  1. Purpose :
!
!     Initialization for source term routine.
!
!  2. Method :
!
!  3. Parameters :
!
!     Parameter list
!     ----------------------------------------------------------------
!     ----------------------------------------------------------------
!
!  4. Subroutines used :
!
!      Name      Type  Module   Description
!     ----------------------------------------------------------------
!      STRACE    Subr. W3SERVMD Subroutine tracing.
!     ----------------------------------------------------------------
!
!  5. Called by :
!
!      Name      Type  Module   Description
!     ----------------------------------------------------------------
!      W3SBTX    Subr. W3SBTXMD Corresponding source term.
!     ----------------------------------------------------------------
!
!  6. Error messages :
!
!       None.
!
!  7. Remarks :
!
!  8. Structure :
!
!     See source code.
!
!  9. Switches :
!
!     !/S  Enable subroutine tracing.
!
! 10. Source code :
!
!/ ------------------------------------------------------------------- /
      USE W3ODATMD, ONLY: NDSE
      USE W3SERVMD, ONLY: EXTCDE
!/S      USE W3SERVMD, ONLY: STRACE
!/
      IMPLICIT NONE
!/
!/ ------------------------------------------------------------------- /
!/ Parameter list
!/
!/
!/ ------------------------------------------------------------------- /
!/ Local parameters
!/
!/S      INTEGER, SAVE           :: IENT = 0
!/
!/ ------------------------------------------------------------------- /
!/
!/S      CALL STRACE (IENT, 'INSBTX')
!
! 1.  .... ----------------------------------------------------------- *
!
!/
!/ End of INSBTX ----------------------------------------------------- /
!/
      END SUBROUTINE INSBTX
!/
!/ End of module INSBTXMD -------------------------------------------- /
!/
      END MODULE W3SBTXMD