mirror of https://github.com/ecmwf/eccodes.git
55 lines
1.5 KiB
Fortran
55 lines
1.5 KiB
Fortran
!
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! Copyright 2005-2014 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 read_message
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use grib_api
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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 grib_open_file(ifile,'../../data/index.grib','r')
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call grib_open_file(ofile,'out.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 grib_read_from_file(ifile,buffer,len1,iret)
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do while (iret/=GRIB_END_OF_FILE)
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! a new grib message is created from buffer
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call grib_new_from_message(igrib,buffer)
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! get as a integer
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call grib_get(igrib,'step', step)
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write(*,*) 'step=',step
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call grib_get(igrib,'level',level)
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write(*,*) 'level=',level
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call grib_release(igrib)
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call grib_write_bytes(ofile,buffer,len1)
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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 grib_read_from_file(ifile,buffer,len1,iret)
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enddo
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call grib_close_file(ifile)
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call grib_close_file(ofile)
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end program read_message
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