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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 create a multi-field message in memory and write
! it to a file. The multi-field messages can be created
! only in GRIB edition 2.
!
!
!
program grib2_multi_write
use eccodes
implicit none
integer :: infile, outfile
integer :: in_gribid
integer :: multi_gribid
integer :: step, startsection
! Multi-field messages can be created only in edition 2
call codes_open_file(infile, '../../data/sample.grib2', 'r')
call codes_open_file(outfile, 'multi_created.grib2', 'w')
! A GRIB message is loaded from file
! in_gribid is the GRIB id to be used in subsequent calls
call codes_grib_new_from_file(infile, in_gribid)
startsection = 4
do step = 0, 240, 12
call codes_set(in_gribid, "step", step)
call codes_grib_multi_append(in_gribid, startsection, multi_gribid)
end do
! Write messages to a file
call codes_grib_multi_write(multi_gribid, outfile)
call codes_release(in_gribid)
call codes_release(multi_gribid)
call codes_close_file(infile)
call codes_close_file(outfile)
end program grib2_multi_write
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