mirror of https://github.com/ecmwf/eccodes.git
60 lines
1.9 KiB
C
60 lines
1.9 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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#include "eccodes.h"
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#undef NDEBUG
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#include <assert.h>
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static void compare_doubles(const double d1, const double d2, const double epsilon)
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{
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assert(fabs(d1 - d2) < epsilon);
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}
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int main(int argc, char* argv[])
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{
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FILE* in = NULL;
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codes_handle* h = NULL;
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size_t values_len = 0;
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int elem_index = 0;
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double a_value = 0; /* value at index */
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int err = 0;
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long compressed = 0;
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const char* infile = "../data/bufr/mhen_55.bufr";
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const char* key_name = "#5#brightnessTemperature";
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const double tolerance = 1e-6;
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ProductKind prod_kind = PRODUCT_ANY;
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in = fopen(infile, "rb");
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assert(in);
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while ((h = codes_handle_new_from_file(NULL, in, PRODUCT_BUFR, &err)) != NULL || err != CODES_SUCCESS) {
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CODES_CHECK(codes_get_product_kind(h, &prod_kind), 0);
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assert(prod_kind == PRODUCT_BUFR);
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CODES_CHECK(codes_get_long(h, "compressedData", &compressed), 0);
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assert(compressed == 1);
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CODES_CHECK(codes_set_long(h, "unpack", 1), 0);
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CODES_CHECK(codes_get_size(h, key_name, &values_len), 0);
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assert(values_len == 2070);
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elem_index = values_len - 1; /* last value of key */
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CODES_CHECK(codes_get_double_element(h, key_name, elem_index, &a_value), 0);
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printf("Key = %s, index = %d, value = %.5f\n", key_name, elem_index, a_value);
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compare_doubles(a_value, 237.43, tolerance);
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codes_handle_delete(h);
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}
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fclose(in);
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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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