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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 get values using keys.
!
program grib_read_message
use eccodes
implicit none
integer :: ifile, ofile
integer :: iret, igrib
integer, dimension(50000) :: buffer
integer(kind=kindOfSize_t) :: len1
integer :: step, level
call codes_open_file(ifile, '../../data/index.grib', 'r')
call codes_open_file(ofile, 'out.readmsg.grib', 'w')
! a GRIB message is read from file into buffer
len1 = size(buffer)*4
call codes_read_from_file(ifile, buffer, len1, iret)
do while (iret /= CODES_END_OF_FILE)
! a new GRIB message is created from buffer
call codes_new_from_message(igrib, buffer)
! get as a integer
call codes_get(igrib, 'step', step)
write (*, *) 'step=', step
call codes_get(igrib, 'level', level)
write (*, *) 'level=', level
call codes_release(igrib)
call codes_write_bytes(ofile, buffer, len1)
! a message is read from file into buffer
len1 = size(buffer)*4
call codes_read_from_file(ifile, buffer, len1, iret)
end do
call codes_close_file(ifile)
call codes_close_file(ofile)
end program grib_read_message
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