eccodes/examples/C/bufr_copy_data.c

/*
 * (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_copy_data
 *
 * Description: How to copy all the values in the data section that are present in the same
 *              position in the data tree and with the same number of values to the output handle
 *
 */
#include "eccodes.h"

static void usage(const char* progname);

int main(int argc, char* argv[])
{
    FILE* f          = NULL;
    codes_handle* h  = NULL;
    codes_handle* ho = NULL;
    long size;
    char** keys            = NULL;
    size_t nkeys           = 0, i;
    int err                = 0;
    char* outfile          = NULL;
    const char* sampleName = "BUFR3";
    const long ibitmap[]   = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                             0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                             1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1,
                             1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
                             1, 1, 1, 1, 0 };

    const long ud[] = { 307011, 7006, 10004, 222000, 101023, 31031, 1031, 1032, 101023, 33007,
                        225000, 236000, 101023, 31031, 1031, 1032, 8024, 101001, 225255, 225000,
                        236000, 101023, 31031, 1031, 1032, 8024, 101001, 225255,
                        1063, 2001, 4001, 4002, 4003, 4004, 4005, 5002,
                        6002, 7001, 7006, 11001, 11016, 11017, 11002 };

    if (argc != 3) usage(argv[0]);

    outfile = argv[2];

    f = fopen(argv[1], "rb");
    if (!f) {
        perror(argv[1]);
        exit(1);
    }
    ho = codes_bufr_handle_new_from_samples(NULL, sampleName);
    if (ho == NULL) {
        fprintf(stderr, "Error: creating BUFR from %s\n", sampleName);
        fclose(f);
        return 1;
    }

    size = sizeof(ibitmap) / sizeof(ibitmap[0]);
    CODES_CHECK(codes_set_long_array(ho, "inputDataPresentIndicator", ibitmap, size), 0);
    CODES_CHECK(codes_set_long(ho, "bufrHeaderCentre", 98), 0);
    CODES_CHECK(codes_set_long(ho, "updateSequenceNumber", 1), 0);
    CODES_CHECK(codes_set_long(ho, "dataCategory", 0), 0);
    CODES_CHECK(codes_set_long(ho, "dataSubCategory", 140), 0);
    CODES_CHECK(codes_set_long(ho, "masterTablesVersionNumber", 13), 0);
    CODES_CHECK(codes_set_long(ho, "localTablesVersionNumber", 1), 0);
    CODES_CHECK(codes_set_long(ho, "typicalYearOfCentury", 15), 0);
    CODES_CHECK(codes_set_long(ho, "typicalMonth", 5), 0);
    CODES_CHECK(codes_set_long(ho, "typicalDay", 4), 0);
    CODES_CHECK(codes_set_long(ho, "typicalHour", 9), 0);
    CODES_CHECK(codes_set_long(ho, "typicalMinute", 30), 0);
    CODES_CHECK(codes_set_long(ho, "numberOfSubsets", 1), 0);
    CODES_CHECK(codes_set_long(ho, "observedData", 1), 0);
    CODES_CHECK(codes_set_long(ho, "compressedData", 0), 0);

    size = sizeof(ud) / sizeof(ud[0]);
    codes_set_long_array(ho, "unexpandedDescriptors", ud, size);

    while ((h = codes_handle_new_from_file(0, f, PRODUCT_BUFR, &err)) != NULL) {
        /* codes_copy_key(h,ho,"unexpandedDescriptors",0); */
        err = codes_set_long(h, "unpack", 1);
        if (err) {
            fprintf(stderr, "Error: Unable to unpack BUFR message. Quitting\n");
            fprintf(stderr, "       %s\n", codes_get_error_message(err));
            return 1;
        }

        /* err=codes_bufr_copy_data(h,ho); */
        keys = codes_bufr_copy_data_return_copied_keys(h, ho, &nkeys, &err);
        for (i = 0; i < nkeys; i++) {
            printf("Copied %s\n", keys[i]);
            free(keys[i]);
        }
        printf("Total number of copied keys = %zu\n", nkeys);
        free(keys);

        codes_handle_delete(h);
    }
    fclose(f);
    codes_write_message(ho, outfile, "w");
    codes_handle_delete(ho);

    return err;
}

static void usage(const char* progname)
{
    printf("\nUsage: %s bufr_in bufr_out\n", progname);
    exit(1);
}