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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: bufr_read_header
*
* Description: how to read the header of BUFR messages.
*
*/
#include "eccodes.h"
static void usage(const char* prog)
{
printf("usage: %s infile\n", prog);
exit(1);
}
int main(int argc, char* argv[])
{
char* filename = NULL;
FILE* in = NULL;
/* message handle. Required in all the eccodes calls acting on a message.*/
codes_handle* h = NULL;
long longVal;
int err = 0, cnt = 0;
if (argc != 2) usage(argv[0]);
filename = argv[1];
in = fopen(filename, "rb");
if (!in) {
fprintf(stderr, "Error: unable to open file %s\n", filename);
return 1;
}
/* loop over the messages in the BUFR file */
while ((h = codes_handle_new_from_file(NULL, in, PRODUCT_BUFR, &err)) != NULL || err != CODES_SUCCESS) {
if (h == NULL) {
fprintf(stderr, "Error: unable to create handle for message %d\n", cnt);
cnt++;
continue;
}
printf("message: %d\n", cnt);
/* get and print some keys from the BUFR header */
CODES_CHECK(codes_get_long(h, "dataCategory", &longVal), 0);
printf(" dataCategory: %ld\n", longVal);
CODES_CHECK(codes_get_long(h, "dataSubCategory", &longVal), 0);
printf(" dataSubCategory: %ld\n", longVal);
CODES_CHECK(codes_get_long(h, "typicalDate", &longVal), 0);
printf(" typicalDate: %ld\n", longVal);
CODES_CHECK(codes_get_long(h, "bufrHeaderCentre", &longVal), 0);
printf(" bufrHeaderCentre: %ld\n", longVal);
CODES_CHECK(codes_get_long(h, "bufrHeaderSubCentre", &longVal), 0);
printf(" bufrHeaderSubCentre: %ld\n", longVal);
CODES_CHECK(codes_get_long(h, "masterTablesVersionNumber", &longVal), 0);
printf(" masterTablesVersionNumber: %ld\n", longVal);
CODES_CHECK(codes_get_long(h, "localTablesVersionNumber", &longVal), 0);
printf(" localTablesVersionNumber: %ld\n", longVal);
CODES_CHECK(codes_get_long(h, "numberOfSubsets", &longVal), 0);
printf(" numberOfSubsets: %ld\n", longVal);
/* release memory */
codes_handle_delete(h);
cnt++;
}
fclose(in);
return 0;
}
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