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/*
* (C) Copyright 2005- ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
*
* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
*/
/*
* C Implementation: fieldset
*
* Description: how to use a fieldset.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "eccodes.h"
void usage(char* prog)
{
printf("Usage: %s order_by grib_file grib_file ...\n", prog);
exit(1);
}
int main(int argc, char** argv)
{
int err = 0;
long step, levelType;
char** filenames;
size_t nkeys, nfiles;
int i = 0;
char* keys[] = { "step", "date", "param", "levelType" };
codes_fieldset* set;
codes_handle* h;
char param[20] = {0,};
char date[10] = {0,};
size_t datelen = 10;
size_t len = 20;
char* order_by = 0;
if (argc != 3) usage(argv[0]);
nkeys = sizeof(keys) / sizeof(*keys);
order_by = strdup(argv[1]);
nfiles = argc - 2;
filenames = (char**)malloc(sizeof(char*) * nfiles);
for (i = 0; i < nfiles; i++)
filenames[i] = (char*)strdup(argv[i + 2]);
set = codes_fieldset_new_from_files(0, filenames, nfiles, keys, nkeys, 0, 0, &err);
CODES_CHECK(err, 0);
/* not jet implemented */
/* err=codes_fieldset_apply_where(set,"(centre=='ecmf') && number==1 || step==6 "); */
/* CODES_CHECK(err,0); */
codes_fieldset_apply_order_by(set, order_by);
CODES_CHECK(err, 0);
printf("\nordering by %s\n", order_by);
printf("\n%d fields in the fieldset\n", codes_fieldset_count(set));
printf("step,date,levelType,levelType\n");
while ((h = codes_fieldset_next_handle(set, &err)) != NULL) {
CODES_CHECK(codes_get_long(h, "step", &step), 0);
CODES_CHECK(codes_get_string(h, "date", date, &datelen), 0);
CODES_CHECK(codes_get_string(h, "param", param, &len), 0);
CODES_CHECK(codes_get_long(h, "levelType", &levelType), 0);
printf("%ld %s %ld %s\n", step, date, levelType, param);
codes_handle_delete(h);
}
codes_fieldset_delete(set);
codes_handle_delete(h);
return 0;
}
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