eccodes/examples/F90/multi_fortran.f90

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! Copyright 2005-2019 ECMWF.
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!
! 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.
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!
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! 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 decode GRIB messages containing multiple
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! fields. Try to turn on and off multi support to
! see the difference. Default is OFF.
! For all the tools default is multi support ON.
!
!
program multi
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use eccodes
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implicit none
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integer :: iret
integer(kind = 4) :: parameterCategory,parameterNumber,discipline
integer :: ifile,igrib
call codes_open_file(ifile, '../../data/multi.grib2','r')
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! turn on support for multi fields messages */
call codes_grib_multi_support_on()
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! turn off support for multi fields messages */
!call codes_grib_multi_support_off()
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call codes_grib_new_from_file(ifile,igrib)
! Loop on all the messages in a file.
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do while (igrib .ne. -1)
! get as a integer*4
call codes_get(igrib,'discipline',discipline)
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write(*,*) 'discipline=',discipline
! get as a integer*4
call codes_get(igrib,'parameterCategory', &
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parameterCategory)
write(*,*) 'parameterCategory=',parameterCategory
! get as a integer*4
call codes_get(igrib,'parameterNumber', &
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parameterNumber)
write(*,*) 'parameterNumber=',parameterNumber
if ( discipline .eq. 0 .and. parameterCategory .eq. 2) then
if (parameterNumber .eq. 2) then
write(*,*) "-------- u -------"
endif
if (parameterNumber .eq. 3) then
write(*,*) "-------- v -------"
endif
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endif
call codes_release(igrib)
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call codes_grib_new_from_file(ifile,igrib, iret)
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end do
call codes_close_file(ifile)
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end program multi