mirror of https://github.com/ecmwf/eccodes.git
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
/*
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* (C) Copyright 2005- 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_expanded
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*
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* Description: how to read all the expanded data values from 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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{
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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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double* values = NULL;
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size_t values_len = 0;
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int i, err = 0;
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int cnt = 0;
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if (argc != 2) usage(argv[0]);
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filename = argv[1];
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/* open bufr file */
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in = fopen(filename, "rb");
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if (!in) {
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fprintf(stderr, "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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if (h == NULL) {
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fprintf(stderr, "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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/* get the size of the values array*/
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CODES_CHECK(codes_get_size(h, "numericValues", &values_len), 0);
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printf(" number of expanded values: %lu\n", values_len);
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/* allocate array for data values */
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values = (double*)malloc(values_len * sizeof(double));
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/* get the expanded data values*/
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CODES_CHECK(codes_get_double_array(h, "numericValues", values, &values_len), 0);
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for (i = 0; i < values_len; i++) {
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printf(" %.10e\n", values[i]);
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}
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free(values);
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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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