mirror of https://github.com/ecmwf/eccodes.git
84 lines
2.3 KiB
C
84 lines
2.3 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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/*
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* C Implementation: fieldset
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*
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* Description: how to use a fieldset.
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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 <string.h>
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#include "eccodes.h"
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void usage(char* prog)
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{
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printf("Usage: %s order_by grib_file grib_file ...\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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{
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int err = 0;
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long step, levelType;
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char** filenames;
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size_t nkeys, nfiles;
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int i = 0;
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char* keys[] = { "step", "date", "param", "levelType" };
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codes_fieldset* set;
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codes_handle* h;
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char param[20] = {0,};
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char date[10] = {0,};
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size_t datelen = 10;
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size_t len = 20;
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char* order_by = 0;
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if (argc != 3) usage(argv[0]);
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nkeys = sizeof(keys) / sizeof(*keys);
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order_by = strdup(argv[1]);
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nfiles = argc - 2;
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filenames = (char**)malloc(sizeof(char*) * nfiles);
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for (i = 0; i < nfiles; i++)
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filenames[i] = (char*)strdup(argv[i + 2]);
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set = codes_fieldset_new_from_files(0, filenames, nfiles, keys, nkeys, 0, 0, &err);
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CODES_CHECK(err, 0);
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/* not yet implemented */
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/* err=codes_fieldset_apply_where(set,"(centre=='ecmf') && number==1 || step==6 "); */
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/* CODES_CHECK(err,0); */
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codes_fieldset_apply_order_by(set, order_by);
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CODES_CHECK(err, 0);
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printf("\nordering by %s\n", order_by);
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printf("\n%d fields in the fieldset\n", codes_fieldset_count(set));
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printf("step,date,levelType,levelType\n");
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while ((h = codes_fieldset_next_handle(set, &err)) != NULL) {
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CODES_CHECK(codes_get_long(h, "step", &step), 0);
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CODES_CHECK(codes_get_string(h, "date", date, &datelen), 0);
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CODES_CHECK(codes_get_string(h, "param", param, &len), 0);
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CODES_CHECK(codes_get_long(h, "levelType", &levelType), 0);
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printf("%ld %s %ld %s\n", step, date, levelType, param);
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codes_handle_delete(h);
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}
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codes_fieldset_delete(set);
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codes_handle_delete(h);
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return 0;
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}
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