eccodes/tests/values_to_ascii.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.
 */

#include <assert.h>
#include <stdio.h>

#ifndef ECCODES_ON_WINDOWS
#include <unistd.h>
#endif

#include "grib_api.h"

int main(int argc, char** argv)
{
    int err        = 0;
    double* values = NULL;
    char format[1024];
    size_t values_len = 0;

    size_t i = 0;

    long ni;
    double a;
    long d;
    FILE* in = NULL;

    grib_handle* h = NULL;


    if (argc > 1)
        in = fopen(argv[1], "rb");
    else {
        printf("usage : gribvals filename [format]\n");
        exit(1);
    }
    if (!in) {
        printf("error file not found");
        return 1;
    }

    if (argc > 2)
        strcpy(format, argv[2]);
    else
        strcpy(format, "%g ");


    h = grib_handle_new_from_file(0, in);
    while (h) {
        if ((err = grib_get_long(h, "ni", &ni)) != GRIB_SUCCESS)
            printf("error %d : %s", err, grib_get_error_message(err));

        if ((err = grib_get_size(h, "values", &values_len)) != GRIB_SUCCESS) {
            printf("error %d : %s", err, grib_get_error_message(err));
            return 1;
        }

        values = malloc(values_len * sizeof(double));

        if ((err = grib_get_double_array(h, "values", values, &values_len)) != GRIB_SUCCESS)
            printf("error %d : %s", err, grib_get_error_message(err));

        for (i = 0; i < values_len; i++) {
            if (i != 0 && (i % ni == 0)) printf("\n");
            printf(format, values[i]);
        }
        printf("\n");
        fprintf(stderr, "%d values\n", i);
        free(values);

        grib_handle_delete(h);

        h = grib_handle_new_from_file(0, in);

        if (h)
            printf("************************************************************\n");
    }
    fclose(in);
    return 0;
}