mirror of https://github.com/ecmwf/eccodes.git
80 lines
2.4 KiB
Fortran
80 lines
2.4 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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!
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! Description: How to set key values in GRIB messages
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!
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!
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program set
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use eccodes
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implicit none
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integer(kind=4) :: centre, date1
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integer :: infile, outfile
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integer :: igrib
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character(len=12) :: marsType = 'ses'
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centre = 80
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call current_date(date1)
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call codes_open_file(infile, '../../data/regular_latlon_surface_constant.grib1', 'r')
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call codes_open_file(outfile, 'out.set.grib1', 'w')
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! a new GRIB message is loaded from file
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! igrib is the GRIB id to be used in subsequent calls
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call codes_grib_new_from_file(infile, igrib)
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call codes_set(igrib, 'dataDate', date1)
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call codes_set(igrib, 'type', marsType)
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! set centre as a integer */
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call codes_set(igrib, 'centre', centre)
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! check if it is correct in the actual GRIB message
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call check_settings(igrib)
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! write modified message to a file
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call codes_write(igrib, outfile)
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call codes_release(igrib)
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call codes_close_file(infile)
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call codes_close_file(outfile)
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contains
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!======================================
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subroutine current_date(date1)
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integer, intent(out) :: date1
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integer :: val_date(8)
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call date_and_time(values=val_date)
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date1 = val_date(1)*10000 + val_date(2)*100 + val_date(3)
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end subroutine current_date
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!======================================
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subroutine check_settings(gribid)
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implicit none
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integer, intent(in) :: gribid
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integer(kind=4) :: int_value
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character(len=10) :: string_value
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! get centre as a integer
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call codes_get(gribid, 'centre', int_value)
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write (*, *) "get centre as a integer - centre = ", int_value
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! get centre as a string
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call codes_get(gribid, 'centre', string_value)
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write (*, *) "get centre as a string - centre = ", string_value
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! get date as a string
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call codes_get(gribid, 'dataDate', string_value)
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write (*, *) "get date as a string - date = ", string_value
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end subroutine check_settings
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end program set
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