! (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 set key values.
!
!
program set
   use eccodes
   implicit none

   integer(kind=4)    :: centre
   integer(kind=4)    :: int_value
   character(len=10)  :: string_value
   character(len=20)  :: string_centre
   integer              :: infile, outfile
   integer              :: igrib

   infile = 5
   outfile = 6

   call codes_open_file(infile, &
                        '../../data/regular_latlon_surface_constant.grib1', 'r')

   call codes_open_file(outfile, &
                        '../../data/out.grib1', 'w')

   ! A new grib message is loaded from file
   ! igrib is the grib id to be used in subsequent calls
   call codes_grib_new_from_file(infile, igrib)

   ! set centre as a long */
   centre = 80
   call codes_set(igrib, 'centre', centre)

   ! get centre as a integer*4
   call codes_get(igrib, 'centre', int_value)
   write (*, *) 'centre=', int_value

   ! get centre as a string
   call codes_get(igrib, 'centre', string_value)
   string_centre = 'centre='//string_value
   write (*, *) string_centre

   ! write modified message to a file
   call codes_write(igrib, outfile)

   call codes_release(igrib)

   call codes_close_file(infile)

   call codes_close_file(outfile)

end program set