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/*
* (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 "grib_api_internal.h"
int main(int argc, char** argv)
{
ECCODES_ASSERT(argc == 2);
int err = 0;
size_t nvalues = 0;
const char* filename = argv[1];
grib_context* c = grib_context_get_default();
FILE* fin = fopen(filename, "r");
ECCODES_ASSERT(fin);
grib_handle* h = grib_handle_new_from_file(0, fin, &err);
ECCODES_ASSERT(h);
ECCODES_ASSERT(!err);
grib_accessor* a = grib_find_accessor(h, "codedValues");
ECCODES_ASSERT(a);
GRIB_CHECK(grib_get_size(h, "codedValues", &nvalues), 0);
double* all_values = (double*)grib_context_malloc(c, sizeof(double) * nvalues);
double* sub_values = (double*)grib_context_malloc(c, sizeof(double) * nvalues);
ECCODES_ASSERT(all_values);
ECCODES_ASSERT(sub_values);
size_t len = nvalues;
GRIB_CHECK(a->unpack_double(all_values, &len), 0);
size_t start = nvalues / 10;
len = nvalues / 5;
printf("nvalues=%zu, start=%zu, len=%zu\n", nvalues, start, len);
GRIB_CHECK(a->unpack_double_subarray(sub_values, start, len), 0);
for (size_t i = 0; i < len; ++i) {
//printf("sub[%zu]=%.10e\n", start + i, sub_values[i]);
ECCODES_ASSERT(all_values[start+i] == sub_values[i]);
}
grib_context_free(c, all_values);
grib_context_free(c, sub_values);
grib_handle_delete(h);
fclose(fin);
return 0;
}
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