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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 key values in GRIB messages
!
!
program set
use eccodes
implicit none
integer(kind=4) :: centre, date1
integer :: infile, outfile
integer :: igrib
character(len=12) :: marsType = 'ses'
centre = 80
call current_date(date1)
call codes_open_file(infile, '../../data/regular_latlon_surface_constant.grib1', 'r')
call codes_open_file(outfile, 'out.set.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)
call codes_set(igrib, 'dataDate', date1)
call codes_set(igrib, 'type', marsType)
! set centre as a integer
call codes_set(igrib, 'centre', centre)
! check if it is correct in the actual GRIB message
call check_settings(igrib)
! 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)
contains
!======================================
subroutine current_date(date1)
integer, intent(out) :: date1
integer :: val_date(8)
call date_and_time(values=val_date)
date1 = val_date(1)*10000 + val_date(2)*100 + val_date(3)
end subroutine current_date
!======================================
subroutine check_settings(gribid)
implicit none
integer, intent(in) :: gribid
integer(kind=4) :: int_value
character(len=10) :: string_value
! get centre as a integer
call codes_get(gribid, 'centre', int_value)
write (*, *) "get centre as a integer - centre = ", int_value
! get centre as a string
call codes_get(gribid, 'centre', string_value)
write (*, *) "get centre as a string - centre = ", string_value
! get date as a string
call codes_get(gribid, 'dataDate', string_value)
write (*, *) "get date as a string - date = ", string_value
end subroutine check_settings
end program set
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