mirror of https://github.com/ecmwf/eccodes.git
78 lines
2.7 KiB
C
78 lines
2.7 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 "grib_api_internal.h"
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/*
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* Check that first coefficient have an imaginary part equal to zero.
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* philippe.marguinaud@meteo.fr, 2016/02
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*/
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#include "grib_sh_values.h" /* array 'values' defined here*/
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#define ILCHAM 992
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#define MTRONC 30
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#define STRONC 10
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int main(int argc, char* argv[])
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{
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size_t len;
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grib_handle* h;
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double zval[ILCHAM];
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int m, n, k;
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const char* outfile;
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Assert(argc == 2);
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outfile = argv[1];
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GRIB_CHECK(((h = grib_handle_new_from_samples(NULL, "sh_ml_grib2")) == NULL), 0);
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/* Meteo-France settings */
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GRIB_CHECK(grib_set_long(h, "centre", 85), 0);
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len = strlen("stretched_rotated_sh");
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GRIB_CHECK(grib_set_string(h, "gridType", "stretched_rotated_sh", &len), 0);
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GRIB_CHECK(grib_set_long(h, "pentagonalResolutionParameterJ", MTRONC), 0);
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GRIB_CHECK(grib_set_long(h, "pentagonalResolutionParameterK", MTRONC), 0);
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GRIB_CHECK(grib_set_long(h, "pentagonalResolutionParameterM", MTRONC), 0);
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GRIB_CHECK(grib_set_double(h, "stretchingFactor", 2.40000000000000), 0);
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GRIB_CHECK(grib_set_double(h, "latitudeOfStretchingPoleInDegrees", 46.4688478326275), 0);
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GRIB_CHECK(grib_set_double(h, "longitudeOfStretchingPoleInDegrees", 2.57831007808864), 0);
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GRIB_CHECK(grib_set_long(h, "bitsPerValue", 16), 0);
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len = strlen("spectral_complex");
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GRIB_CHECK(grib_set_string(h, "packingType", "spectral_complex", &len), 0);
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GRIB_CHECK(grib_set_long(h, "subSetJ", STRONC), 0);
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GRIB_CHECK(grib_set_long(h, "subSetK", STRONC), 0);
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GRIB_CHECK(grib_set_long(h, "subSetM", STRONC), 0);
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GRIB_CHECK(grib_set_long(h, "unpackedSubsetPrecision", 1), 0);
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GRIB_CHECK(grib_set_double_array(h, "values", values, ILCHAM), 0);
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len = ILCHAM;
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GRIB_CHECK(grib_get_double_array(h, "values", zval, &len), 0);
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for (m = 0, k = 0; m < MTRONC + 1; m++) {
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for (n = MTRONC - m; n < MTRONC + 1; k++, n++) {
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/* Check that imaginary part of first coefficients is zero */
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if ((m == 0) && (zval[2 * k + 1] != 0.)) {
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printf("Imaginary part of coefficient (m=%d,n=%d) should be zero\n", m, n);
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return 1;
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}
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}
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}
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GRIB_CHECK(grib_write_message(h, outfile, "w"), 0);
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GRIB_CHECK(grib_handle_delete(h), 0);
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printf("ALL OK\n");
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return 0;
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}
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