mirror of https://github.com/ecmwf/eccodes.git
68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/*
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* (C) Copyright 2005- 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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int main(int argc, char* argv[])
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{
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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) return 1;
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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) {
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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("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) {
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printf("error: %d\n", ret);
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exit(ret);
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}
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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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