2020-01-28 14:32:34 +00:00
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! (C) Copyright 2005- ECMWF.
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2013-03-25 12:04:10 +00:00
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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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2017-02-06 16:45:30 +00:00
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!
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2013-03-25 12:04:10 +00:00
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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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2015-02-11 16:23:21 +00:00
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! Description: How to decode GRIB messages containing multiple
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2013-03-25 12:04:10 +00:00
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! fields. Try to turn on and off multi support to
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! see the difference. Default is OFF.
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2022-12-21 11:23:48 +00:00
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! For all the tools (e.g., grib_ls etc) multi support is ON.
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2013-03-25 12:04:10 +00:00
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!
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!
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program multi
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2021-02-14 18:14:39 +00:00
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use eccodes
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implicit none
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2017-02-06 16:45:30 +00:00
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2023-08-25 17:44:07 +00:00
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integer :: iret
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integer(kind=4) :: parameterCategory, parameterNumber, discipline
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integer :: ifile, igrib, counter
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2021-02-14 18:14:39 +00:00
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call codes_open_file(ifile, '../../data/multi.grib2', 'r')
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2013-03-25 12:04:10 +00:00
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2023-08-25 17:44:07 +00:00
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! Turn off support for multi-field messages
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call codes_grib_multi_support_off()
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2013-03-25 12:04:10 +00:00
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2023-08-25 17:44:07 +00:00
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! Turn on support for multi-field messages
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call codes_grib_multi_support_on()
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call codes_grib_new_from_file(ifile, igrib)
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! Loop on all the messages in a file.
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do while (igrib .ne. -1)
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2013-03-25 12:04:10 +00:00
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2023-08-25 17:44:07 +00:00
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counter = counter + 1
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2021-02-14 18:14:39 +00:00
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! get as a integer*4
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call codes_get(igrib, 'discipline', discipline)
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write (*, *) 'discipline=', discipline
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! get as a integer*4
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call codes_get(igrib, 'parameterCategory', &
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parameterCategory)
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write (*, *) 'parameterCategory=', parameterCategory
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2021-02-14 18:14:39 +00:00
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! get as a integer*4
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call codes_get(igrib, 'parameterNumber', &
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parameterNumber)
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write (*, *) 'parameterNumber=', parameterNumber
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if (discipline .eq. 0 .and. parameterCategory .eq. 2) then
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if (parameterNumber .eq. 2) then
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write (*, *) "-------- u -------"
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end if
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if (parameterNumber .eq. 3) then
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write (*, *) "-------- v -------"
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end if
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end if
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2013-03-25 12:04:10 +00:00
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2021-02-14 18:14:39 +00:00
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call codes_release(igrib)
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call codes_grib_new_from_file(ifile, igrib, iret)
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end do
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call codes_close_file(ifile)
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write(*,*) 'Message count =',counter
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2013-03-25 12:04:10 +00:00
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end program multi
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