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! (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 missing a key value.
!
!
!
program set_missing
use eccodes
implicit none
integer :: infile, outfile
integer :: igrib, Ni, is_missing
infile = 5
outfile = 6
call codes_open_file(infile, &
'../../data/reduced_gaussian_pressure_level.grib2', 'r')
call codes_open_file(outfile, &
'f_out_surface_level.grib2', '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)
call codes_set(igrib, 'typeOfFirstFixedSurface', 'sfc')
call codes_set_missing(igrib, 'scaleFactorOfFirstFixedSurface')
call codes_set_missing(igrib, 'scaledValueOfFirstFixedSurface')
! see GRIB-490
call codes_get(igrib, 'Ni', Ni)
call codes_is_missing(igrib, 'Ni', is_missing)
if (is_missing == 0) then
! Ni should be missing in gribs with Reduced Gaussian grids
call codes_check(-2, 'Ni_should_be_missing', '')
end if
call codes_set(igrib, 'Ni', Ni)
call codes_write(igrib, outfile)
call codes_release(igrib)
call codes_close_file(infile)
call codes_close_file(outfile)
end program
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