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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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "grib_api.h"
int main(int argc, char** argv)
{
int err = 0;
long step;
const char** filenames = NULL;
size_t nkeys, nfiles, i=0;
const char* keys[] = { "step:i", "date", "paramId", "levelType" };
grib_fieldset* set = NULL;
grib_handle* h = NULL;
char param[20] = {0,};
char typeOfLevel[50] = {0,};
char date[10] = {0,};
size_t lenDate = 10, lenParam = 20, lenLevel = 50;
char* order_by = NULL;
if (argc != 3) return 1; //Usage: prog order_by grib_file grib_file ...
nkeys = sizeof(keys) / sizeof(*keys);
order_by = argv[1];
nfiles = argc - 2;
filenames = (const char**)malloc(sizeof(char*) * nfiles);
for (i = 0; i < nfiles; i++)
filenames[i] = (char*)strdup(argv[i + 2]);
set = grib_fieldset_new_from_files(0, filenames, nfiles, keys, nkeys, 0, 0, &err);
GRIB_CHECK(err, 0);
/* not yet implemented */
/* err=grib_fieldset_apply_where(set,"(centre=='ecmf') && number==1 || step==6 "); */
/* GRIB_CHECK(err,0); */
grib_fieldset_apply_order_by(set, order_by);
GRIB_CHECK(err, 0);
printf("Ordering by %s\n", order_by);
printf("\n%d fields in the fieldset\n", grib_fieldset_count(set));
printf("step,date,levelType,levelType\n");
while ((h = grib_fieldset_next_handle(set, &err)) != NULL) {
lenParam = sizeof(param);
lenDate = sizeof(date);
lenLevel = sizeof(typeOfLevel);
GRIB_CHECK(grib_get_long(h, "step", &step), 0);
GRIB_CHECK(grib_get_string(h, "date", date, &lenDate), 0);
GRIB_CHECK(grib_get_string(h, "paramId", param, &lenParam), 0);
GRIB_CHECK(grib_get_string(h, "levelType", typeOfLevel, &lenLevel), 0);
printf("%ld %s %s %s\n", step, date, typeOfLevel, param);
grib_handle_delete(h);
}
grib_fieldset_delete(set);
grib_handle_delete(h);
for (i = 0; i < nfiles; i++)
free((char*)filenames[i]);
free(filenames);
return 0;
}
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