! (C) Copyright 2005- ECMWF.
!
! This software is licensed under the terms of the Apache Licence Version 2.0
! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
!
! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
!
!
!  Description: How to decode GRIB2 multi-field messages.
!               Try to turn multi support on and off to
!               see the difference. Default is OFF.
!               For all the tools default is multi support ON.
!
program multi
   use eccodes
   implicit none

   integer              :: iret
   integer(kind=4)    :: step
   integer              :: ifile, igrib

   call codes_open_file(ifile, '../../data/multi_created.grib2', 'r')

   ! turn on support for multi-field messages */
   call codes_grib_multi_support_on()

   ! turn off support for multi-field messages */
   !call codes_grib_multi_support_off()

   call codes_grib_new_from_file(ifile, igrib, iret)
   ! Loop on all the messages in a file.

   write (*, *) 'step'
   do while (iret /= CODES_END_OF_FILE)

      call codes_get(igrib, 'step', step)
      write (*, '(i3)') step

      call codes_grib_new_from_file(ifile, igrib, iret)

   end do
   call codes_close_file(ifile)

end program multi
