/*
 * (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_get_string_array
 *
 * Description: how to get an array of strings from a BUFR message.
 *
 */

#include "eccodes.h"

int main(int argc, char* argv[])
{
    codes_handle* h = NULL;

    size_t i = 0, size = 0;
    size_t len = 0;
    int err = 0, cnt = 0;
    char** strArray    = NULL; /* array of strings */
    const char* infile = "../../data/bufr/pgps_110.bufr";

    FILE* in = fopen(infile, "rb");
    if (!in) {
        fprintf(stderr, "Error: unable to open file %s\n", infile);
        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;
        }

        /* we need to instruct ecCodes to expand the descriptors
          i.e. unpack the data values */
        CODES_CHECK(codes_set_long(h, "unpack", 1), 0);

        /* get the size and allocate memory */
        CODES_CHECK(codes_get_size(h, "stationOrSiteName", &len), 0);
        strArray = (char**)malloc(len * sizeof(char*));
        if (!strArray) {
            fprintf(stderr, "Error: Could not allocate memory\n");
            return 1;
        }
        CODES_CHECK(codes_get_string_array(h, "stationOrSiteName", strArray, &size), 0);
        for (i = 0; i < size; ++i) {
            printf("%s\n", strArray[i]);
        }
        printf("stationOrSiteName string array size = %zu\n", size);

        /* free allocated arrays */
        for (i = 0; i < size; ++i)
            free(strArray[i]);
        free(strArray);

        /* delete handle */
        codes_handle_delete(h);

        cnt++;
    }

    fclose(in);
    return 0;
}