00001 ! Copyright 2005-2014 ECMWF
00002 ! This software is licensed under the terms of the Apache Licence Version 2.0
00003 ! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
00004 !
00005 ! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
00006 ! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
00007 !
00008 !
00009 ! Description: how to set key values.
00010 !
00011 !
00012 ! Author: Anne Fouilloux
00013 !
00014 !
00015 program set
00016 use grib_api
00017 implicit none
00018 integer(kind = 4) :: centre, date
00019 integer :: infile,outfile
00020 integer :: igrib
00021
00022
00023 centre = 80
00024 call current_date(date)
00025 call grib_open_file(infile, &
00026 '../../data/regular_latlon_surface_constant.grib1','r')
00027
00028 call grib_open_file(outfile, &
00029 'out.grib1','w')
00030
00031 ! a new grib message is loaded from file
00032 ! igrib is the grib id to be used in subsequent calls
00033 call grib_new_from_file(infile,igrib)
00034
00035 call grib_set(igrib,'date',date)
00036 ! set centre as a integer */
00037 call grib_set(igrib,'centre',centre)
00038
00039 ! check if it is correct in the actual GRIB message
00040
00041 call check_settings(igrib)
00042
00043 ! write modified message to a file
00044 call grib_write(igrib,outfile)
00045
00046 call grib_release(igrib)
00047
00048 call grib_close_file(infile)
00049
00050 call grib_close_file(outfile)
00051
00052 contains
00053
00054 !======================================
00055 subroutine current_date(date)
00056 integer, intent(out) :: date
00057
00058 integer :: val_date(8)
00059 call date_and_time ( values = val_date)
00060
00061 date = val_date(1)* 10000 + val_date(2)*100 + val_date(3)
00062 end subroutine current_date
00063 !======================================
00064 subroutine check_settings(gribid)
00065 use grib_api
00066 implicit none
00067 integer, intent(in) :: gribid
00068
00069 integer(kind = 4) :: int_value
00070 character(len = 10) :: string_value
00071
00072 ! get centre as a integer
00073 call grib_get(gribid,'centre',int_value)
00074 write(*,*) "get centre as a integer - centre = ",int_value
00075
00076 ! get centre as a string
00077 call grib_get(gribid,'centre',string_value)
00078 write(*,*) "get centre as a string - centre = ",string_value
00079
00080 ! get date as a string
00081 call grib_get(gribid,'dataDate',string_value)
00082 write(*,*) "get date as a string - date = ",string_value
00083
00084 end subroutine check_settings
00085 end program set
