mirror of https://github.com/ecmwf/eccodes.git
54 lines
1.6 KiB
Fortran
54 lines
1.6 KiB
Fortran
! (C) Copyright 2005- ECMWF.
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!
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! This software is licensed under the terms of the Apache Licence Version 2.0
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! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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!
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! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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!
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! Description: How to get values using keys.
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!
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program grib_read_message
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use eccodes
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implicit none
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integer :: ifile, ofile
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integer :: iret, igrib
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integer, dimension(50000) :: buffer
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integer(kind=kindOfSize_t) :: len1
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integer :: step, level
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call codes_open_file(ifile, '../../data/index.grib', 'r')
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call codes_open_file(ofile, 'out.readmsg.grib', 'w')
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! a GRIB message is read from file into buffer
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len1 = size(buffer)*4
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call codes_read_from_file(ifile, buffer, len1, iret)
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do while (iret /= CODES_END_OF_FILE)
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! a new GRIB message is created from buffer
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call codes_new_from_message(igrib, buffer)
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! get as a integer
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call codes_get(igrib, 'step', step)
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write (*, *) 'step=', step
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call codes_get(igrib, 'level', level)
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write (*, *) 'level=', level
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call codes_release(igrib)
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call codes_write_bytes(ofile, buffer, len1)
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! a message is read from file into buffer
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len1 = size(buffer)*4
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call codes_read_from_file(ifile, buffer, len1, iret)
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end do
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call codes_close_file(ifile)
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call codes_close_file(ofile)
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end program grib_read_message
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