!**********************************************************************
! Copyright 1998,1999,2000,2001,2002,2005,2007,2008,2009,2010         *
! Andreas Stohl, Petra Seibert, A. Frank, Gerhard Wotawa,             *
! Caroline Forster, Sabine Eckhardt, John Burkhart, Harald Sodemann   *
!                                                                     *
! This file is part of FLEXPART.                                      *
!                                                                     *
! FLEXPART is free software: you can redistribute it and/or modify    *
! it under the terms of the GNU General Public License as published by*
! the Free Software Foundation, either version 3 of the License, or   *
! (at your option) any later version.                                 *
!                                                                     *
! FLEXPART is distributed in the hope that it will be useful,         *
! but WITHOUT ANY WARRANTY; without even the implied warranty of      *
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the       *
! GNU General Public License for more details.                        *
!                                                                     *
! You should have received a copy of the GNU General Public License   *
! along with FLEXPART.  If not, see <http://www.gnu.org/licenses/>.   *
!**********************************************************************

integer function detectformat()

  !*****************************************************************************
  !                                                                            *
  !   This routine reads the 1st file with windfields to determine             *
  !   the format.                                                              *
  !                                                                            *
  !     Authors: M. Harustak                                                   *
  !                                                                            *
  !     6 May 2015                                                             *
  !                                                                            *
  !   Unified ECMWF and GFS builds                                             *
  !   Marian Harustak, 12.5.2017                                               *
  !     - Added routine to FP10 Flexpart distribution                          *
  !*****************************************************************************
  !                                                                            *
  ! Variables:                                                                 *
  ! fname                file name of file to check                            *
  !                                                                            *
  !*****************************************************************************

  use par_mod
  use com_mod
  use class_gribfile


  implicit none

  character(len=255) :: filename
  character(len=255) :: wfname1(maxwf)
  integer :: metdata_format

  ! If no file is available
  if ( maxwf.le.0 ) then
    print*,'No wind file available'
    detectformat = GRIBFILE_CENTRE_UNKNOWN
    return
  endif

  ! construct filename
  filename = path(3)(1:length(3)) // trim(wfname(1))
 
  ! get format
  detectformat = gribfile_centre(TRIM(filename))

end