mirror of https://github.com/ecmwf/eccodes.git
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
/*
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* Copyright 2005-2018 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: bufr_read_header
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*
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* Description: how to read the header of BUFR messages.
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*
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*/
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#include "eccodes.h"
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static void usage(const char* prog) {
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printf("usage: %s infile\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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char* filename = NULL;
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FILE* in = NULL;
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/* message handle. Required in all the eccodes calls acting on a message.*/
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codes_handle* h=NULL;
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long longVal;
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int err=0, cnt=0;
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if (argc!=2) usage(argv[0]);
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filename=argv[1];
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in=fopen(filename,"r");
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if (!in) {
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printf("ERROR: unable to open file %s\n", filename);
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return 1;
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}
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/* loop over the messages in the bufr file */
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while ((h = codes_handle_new_from_file(NULL,in,PRODUCT_BUFR,&err)) != NULL || err != CODES_SUCCESS)
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{
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if (h == NULL) {
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printf("Error: unable to create handle for message %d\n",cnt);
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cnt++;
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continue;
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}
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printf("message: %d\n",cnt);
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/* get and print some keys form the BUFR header */
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CODES_CHECK(codes_get_long(h,"dataCategory",&longVal),0);
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printf(" dataCategory: %ld\n",longVal);
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CODES_CHECK(codes_get_long(h,"dataSubCategory",&longVal),0);
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printf(" dataSubCategory: %ld\n",longVal);
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CODES_CHECK(codes_get_long(h,"typicalDate",&longVal),0);
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printf(" typicalDate: %ld\n",longVal);
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CODES_CHECK(codes_get_long(h,"bufrHeaderCentre",&longVal),0);
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printf(" bufrHeaderCentre: %ld\n",longVal);
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CODES_CHECK(codes_get_long(h,"bufrHeaderSubCentre",&longVal),0);
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printf(" bufrHeaderSubCentre: %ld\n",longVal);
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CODES_CHECK(codes_get_long(h,"masterTablesVersionNumber",&longVal),0);
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printf(" masterTablesVersionNumber: %ld\n",longVal);
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CODES_CHECK(codes_get_long(h,"localTablesVersionNumber",&longVal),0);
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printf(" localTablesVersionNumber: %ld\n",longVal);
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CODES_CHECK(codes_get_long(h,"numberOfSubsets",&longVal),0);
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printf(" numberOfSubsets: %ld\n",longVal);
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/* delete handle */
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codes_handle_delete(h);
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cnt++;
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}
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fclose(in);
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return 0;
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}
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