mirror of https://github.com/ecmwf/eccodes.git
109 lines
3.9 KiB
Fortran
109 lines
3.9 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: Count messages before processing
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!
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!
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program grib_count_messages
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use eccodes
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implicit none
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integer :: ifile
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integer :: iret
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integer :: n
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integer :: i
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integer, dimension(:), allocatable :: igrib
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real :: latitudeOfFirstPointInDegrees
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real :: longitudeOfFirstPointInDegrees
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real :: latitudeOfLastPointInDegrees
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real :: longitudeOfLastPointInDegrees
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integer :: numberOfPointsAlongAParallel
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integer :: numberOfPointsAlongAMeridian
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real, dimension(:), allocatable :: values
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integer(8) :: numberOfValues
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real :: average, min_val, max_val
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call codes_open_file(ifile, '../../data/tigge_pf_ecmwf.grib2', 'r')
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! count the messages in the file
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call codes_count_in_file(ifile, n)
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allocate (igrib(n))
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igrib = -1
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! load the messages from the file.
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DO i = 1, n
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call codes_grib_new_from_file(ifile, igrib(i), iret)
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END DO
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! we can close the file
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call codes_close_file(ifile)
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! loop on all the messages in memory
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DO i = 1, n
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write (*, *) 'processing message number ', i
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! get as a integer
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call codes_get(igrib(i), 'Ni', numberOfPointsAlongAParallel)
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write (*, *) 'numberOfPointsAlongAParallel=', &
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numberOfPointsAlongAParallel
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! get as a integer
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call codes_get(igrib(i), 'Nj', numberOfPointsAlongAMeridian)
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write (*, *) 'numberOfPointsAlongAMeridian=', &
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numberOfPointsAlongAMeridian
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! get as a real
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call codes_get(igrib(i), 'latitudeOfFirstGridPointInDegrees', &
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latitudeOfFirstPointInDegrees)
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write (*, *) 'latitudeOfFirstGridPointInDegrees=', &
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latitudeOfFirstPointInDegrees
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! get as a real
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call codes_get(igrib(i), 'longitudeOfFirstGridPointInDegrees', &
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longitudeOfFirstPointInDegrees)
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write (*, *) 'longitudeOfFirstGridPointInDegrees=', &
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longitudeOfFirstPointInDegrees
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! get as a real
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call codes_get(igrib(i), 'latitudeOfLastGridPointInDegrees', &
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latitudeOfLastPointInDegrees)
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write (*, *) 'latitudeOfLastGridPointInDegrees=', &
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latitudeOfLastPointInDegrees
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! get as a real
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call codes_get(igrib(i), 'longitudeOfLastGridPointInDegrees', &
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longitudeOfLastPointInDegrees)
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write (*, *) 'longitudeOfLastGridPointInDegrees=', &
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longitudeOfLastPointInDegrees
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! get the size of the values array
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call codes_get_size(igrib(i), 'values', numberOfValues)
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write (*, *) 'numberOfValues=', numberOfValues
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allocate (values(numberOfValues), stat=iret)
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! get data values
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call codes_get(igrib(i), 'values', values)
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call codes_get(igrib(i), 'min', min_val) ! can also be obtained through minval(values)
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call codes_get(igrib(i), 'max', max_val) ! can also be obtained through maxval(values)
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call codes_get(igrib(i), 'average', average) ! can also be obtained through maxval(values)
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write (*, *) 'There are ', numberOfValues, &
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' average is ', average, &
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' min is ', min_val, &
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' max is ', max_val
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write (*, *) '---------------------'
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deallocate (values)
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END DO
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DO i = 1, n
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call codes_release(igrib(i))
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END DO
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deallocate (igrib)
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end program
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