mirror of https://github.com/ecmwf/eccodes.git
126 lines
3.6 KiB
C
126 lines
3.6 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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* Description: test setting the number of bits per value before decoding and then encoding;
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* setting the wrong number of bpv should result in an error
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*/
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#include "grib_api_internal.h"
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static double compare_double_absolute(double a, double b, double tolerance)
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{
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double ret = 0;
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double d = fabs(a - b);
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if (d > tolerance) {
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ret = d;
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}
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return ret;
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}
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static void usage(const char* prog)
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{
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fprintf(stderr, "usage: %s input\n", prog);
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exit(1);
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}
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static int check_error_code(int err)
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{
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if (err == GRIB_INVALID_BPV || err == GRIB_DECODING_ERROR)
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return GRIB_SUCCESS;
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return GRIB_INVALID_ARGUMENT;
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}
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int main(int argc, char** argv)
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{
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int err = 0, i;
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size_t values_len = 0;
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double* values = NULL;
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char error_msg[100];
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const double tolerance = 1e-5;
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size_t slong = sizeof(long) * 8;
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grib_handle* h;
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char* filename;
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if (argc < 2) usage(argv[0]);
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filename = argv[1];
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for (i = 0; i < 255; i++) {
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FILE* in = fopen(filename, "rb");
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Assert(in);
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h = grib_handle_new_from_file(0, in, &err);
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Assert(h);
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/* get the size of the values array*/
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GRIB_CHECK(grib_get_size(h, "values", &values_len), 0);
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values = (double*)malloc(values_len * sizeof(double));
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err = grib_get_double_array(h, "values", values, &values_len);
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if (compare_double_absolute(values[0], 2.7900000000e+02, tolerance) != 0)
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printf("oops i=%d values[0]=%g\n", i, values[0]);
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if (compare_double_absolute(values[1], 2.7996093750e+02, tolerance) != 0)
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printf("oops i=%d values[1]=%g\n", i, values[1]);
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GRIB_CHECK(grib_set_long(h, "bitsPerValue", i), 0);
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err = grib_set_double_array(h, "values", values, values_len);
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free(values);
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values = 0;
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/*
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* check if encoding of the data fails when the number of bpv
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* is not supported; bpv allowed on decoding is bpv < size of long
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*/
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if (i < slong && err == 0) {
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/* do nothing */
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}
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else if (i >= slong && check_error_code(err) == GRIB_SUCCESS) {
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/* do nothing */
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}
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else {
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snprintf(error_msg, sizeof(error_msg), "Error decoding when bpv=%d. Error message:%s", i, grib_get_error_message(err));
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perror(error_msg);
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exit(1);
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}
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values = (double*)malloc(values_len * sizeof(double));
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err = grib_get_double_array(h, "values", values, &values_len);
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/*
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* check if decoding of the data fails when the number of bpv
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* is not supported; bpv allowed on decoding is bpv <= size of long
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*/
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if (i < slong && err == 0) {
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/* do nothing */
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}
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else if (i >= slong && check_error_code(err) == GRIB_SUCCESS) {
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/* do nothing */
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}
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else {
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snprintf(error_msg, sizeof(error_msg), "Error decoding when bpv=%d. Error message:%s", i, grib_get_error_message(err));
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perror(error_msg);
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exit(1);
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}
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free(values);
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values = 0;
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grib_handle_delete(h);
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h = 0;
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fclose(in);
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}
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grib_context_delete(grib_context_get_default());
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return 0;
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}
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