mirror of https://github.com/ecmwf/eccodes.git
92 lines
2.3 KiB
Fortran
92 lines
2.3 KiB
Fortran
C Copyright 2005-2015 ECMWF.
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C
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C This software is licensed under the terms of the Apache Licence Version 2.0
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C which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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C
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C In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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C virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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C
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C
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C
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C Fortran 77 Implementation: keys_iterator
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C
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C Description:
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C Example on how to use keys_iterator functions and the
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C grib_keys_iterator structure to get all the available
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C keys in a message.
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C
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C
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C
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C
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program keys_iterator
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implicit none
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include 'grib_api_f77.h'
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integer ifile,igrib,iret
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integer grib_count
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integer maxNumberOfValues
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parameter( maxNumberOfValues = 10000 )
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include 'grib_api_fortran.h'
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integer ifile
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integer iret
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integer igrib
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integer i
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real*8 values(maxNumberOfValues)
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integer*4 numberOfValues
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character*256 error
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integer*4 size
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size=maxNumberOfValues
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ifile=5
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iret=grib_open_file(ifile
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X,'../x.grib1','r')
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call grib_check(grib_open_file(outfile
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X,'../out.grib1','w'))
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C Loop on all the messages in a file.
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10 iret=grib_new_from_file(ifile,igrib)
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if (igrib .eq. -1 ) then
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if (iret .ne.0) then
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call grib_check(iret)
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endif
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stop
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endif
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grib_count=grib_count+1
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write(*,*) '-- GRIB N. ',grib_count,' --'
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C a new grib message is loaded from file
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C igrib is the grib id to be used in subsequent calls
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call grib_check( grib_new_from_file(ifile,igrib) )
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C get the size of the values array
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call grib_check(grib_get_size(igrib,'values',numberOfValues))
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write(*,*) 'numberOfValues=',numberOfValues
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C get data values
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call grib_check(grib_get_real8_array(igrib,'values',values,size))
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if ( size .ne. numberOfValues ) then
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write(*,*) 'ERROR: wrong numberOfValues'
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stop
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endif
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do i=1,numberOfValues
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values(i)=values(i)*9.8;
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enddo
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call grib_check(grib_set_real8_array(igrib,'values',values,size))
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C write modified message to a file
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call grib_check(grib_write(igrib,outfile))
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goto 10
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call grib_check(grib_release(igrib))
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call grib_check(grib_close_file(ifile))
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end
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