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