mirror of https://github.com/ecmwf/eccodes.git
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/*
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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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/*
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* C Implementation: multi
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*
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* Description: How to decode grib messages containing multiple
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* fields. Try to turn on and off multi support to
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* see the difference. Default is OFF.
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* For all the tools defalut is multi support ON.
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*
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*
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*
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "grib_api.h"
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int main(int argc, char** argv) {
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int err = 0;
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long parameterCategory=0,parameterNumber=0,discipline=0;
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FILE* in = NULL;
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char* filename = "../data/multi.grib2";
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grib_handle *h = NULL;
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/* turn on support for multi fields messages */
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grib_multi_support_on(0);
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/* turn off support for multi fields messages */
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/* grib_multi_support_off(0); */
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in = fopen(filename,"r");
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if(!in) {
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printf("ERROR: unable to open file %s\n",filename);
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return 1;
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}
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while ((h = grib_handle_new_from_file(0,in,&err)) != NULL ) {
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GRIB_CHECK(err,0);
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GRIB_CHECK(grib_get_long(h,"discipline",&discipline),0);
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printf("discipline=%ld\n",discipline);
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GRIB_CHECK(grib_get_long(h,"parameterCategory",¶meterCategory),0);
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printf("parameterCategory=%ld\n",parameterCategory);
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GRIB_CHECK(grib_get_long(h,"parameterNumber",¶meterNumber),0);
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printf("parameterNumber=%ld\n",parameterNumber);
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if ( discipline == 0 && parameterCategory==2) {
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if (parameterNumber == 2) printf("-------- u -------\n");
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if (parameterNumber == 3) printf("-------- v -------\n");
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}
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}
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grib_handle_delete(h);
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fclose(in);
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return 0;
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}
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