mirror of https://github.com/ecmwf/eccodes.git
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/*
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* Copyright 2005-2017 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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#include "grib_api.h"
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void usage(char* prog) {
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printf("usage: %s infile\n",prog);
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exit(1);
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}
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int main(int argc,char* argv[]) {
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grib_index* index=NULL;
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grib_handle* h=NULL;
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char* infile=NULL;
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int i,j,k,l;
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long ostep,olevel,onumber;
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char oshortName[200];
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size_t lenshortName=200;
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int ret=0,count=0;
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if (argc != 2) usage(argv[0]);
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infile=argv[1];
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outfile=argv[2];
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printf("indexing...\n");
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/* Create an index from a grib file with a given set of keys*/
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index=grib_index_new_from_file(0,infile,"shortName,level,number,step",&ret);
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if (ret) {printf("error: %s\n",grib_get_error_message(ret)); exit(ret);}
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printf("end indexing...\n");
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/* ask the index to order the fields thorough some keys*/
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ret=grib_index_orderby(index,"level,shortName,number:desc,step:asc");
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if (ret!=GRIB_SUCCESS) exit(1);
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count=0;
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/* loop through all the fields in the asked order*/
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while ((h=grib_handle_new_from_index(index,&ret))!=NULL){
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count++;
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if (ret) {printf("error: %d\n",ret); exit(ret);}
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lenshortName=200;
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grib_get_string(h,"shortName",oshortName,&lenshortName);
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grib_get_long(h,"level",&olevel);
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grib_get_long(h,"number",&onumber);
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grib_get_long(h,"step",&ostep);
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printf("shortName=%s ",oshortName);
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printf("level=%ld ",olevel);
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printf("number=%ld ",onumber);
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printf("step=%ld \n",ostep);
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grib_handle_delete(h);
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}
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if (ret!=GRIB_END_OF_INDEX) {
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printf("error: %s\n",grib_get_error_message(ret));
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exit(ret);
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}
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printf(" %d messages selected\n",count);
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return 0;
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}
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