2015-01-20 19:41:44 +01:00
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// Part of dump1090, a Mode S message decoder for RTLSDR devices.
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//
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// cprtests.c - tests for CPR decoder
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//
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// Copyright (c) 2014,2015 Oliver Jowett <oliver@mutability.co.uk>
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//
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2017-06-15 19:16:51 +02:00
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// This file is free software: you may copy, redistribute and/or modify it
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2015-01-20 19:41:44 +01:00
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// under the terms of the GNU General Public License as published by the
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2017-06-15 19:16:51 +02:00
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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2015-01-20 19:41:44 +01:00
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//
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2017-06-15 19:16:51 +02:00
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// This file is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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2015-01-20 19:41:44 +01:00
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// General Public License for more details.
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//
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2017-06-15 19:16:51 +02:00
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// You should have received a copy of the GNU General Public License
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2015-01-20 19:41:44 +01:00
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include <math.h>
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#include <stdio.h>
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#include "cpr.h"
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// Global, airborne CPR test data:
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static const struct {
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int even_cprlat, even_cprlon; // input: raw CPR values, even message
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int odd_cprlat, odd_cprlon; // input: raw CPR values, odd message
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int even_result; // verify: expected result from decoding with fflag=0 (even message is latest)
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double even_rlat, even_rlon; // verify: expected position from decoding with fflag=0 (even message is latest)
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int odd_result; // verify: expected result from decoding with fflag=1 (odd message is latest)
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double odd_rlat, odd_rlon; // verify: expected position from decoding with fflag=1 (odd message is latest)
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} cprGlobalAirborneTests[] = {
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{ 80536, 9432, 61720, 9192, 0, 51.686646, 0.700156, 0, 51.686763, 0.701294 },
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{ 80534, 9413, 61714, 9144, 0, 51.686554, 0.698745, 0, 51.686484, 0.697632 },
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// todo: more positions, bad data
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};
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// Global, surface CPR test data:
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static const struct {
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double reflat, reflon; // input: reference location for decoding
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int even_cprlat, even_cprlon; // input: raw CPR values, even message
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int odd_cprlat, odd_cprlon; // input: raw CPR values, odd message
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int even_result; // verify: expected result from decoding with fflag=0 (even message is latest)
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double even_rlat, even_rlon; // verify: expected position from decoding with fflag=0 (even message is latest)
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int odd_result; // verify: expected result from decoding with fflag=1 (odd message is latest)
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double odd_rlat, odd_rlon; // verify: expected position from decoding with fflag=1 (odd message is latest)
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} cprGlobalSurfaceTests[] = {
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// The real position received here was on the Cambridge (UK) airport apron at 52.21N 0.177E
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// We mess with the reference location to check that the right quadrant is used.
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// longitude quadrants:
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{ 52.00, -180.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601 - 180.0, 0, 52.209976, 0.176507 - 180.0 },
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{ 52.00, -140.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601 - 180.0, 0, 52.209976, 0.176507 - 180.0 },
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{ 52.00, -130.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601 - 90.0, 0, 52.209976, 0.176507 - 90.0 },
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{ 52.00, -50.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601 - 90.0, 0, 52.209976, 0.176507 - 90.0 },
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{ 52.00, -40.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601, 0, 52.209976, 0.176507 },
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{ 52.00, -10.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601, 0, 52.209976, 0.176507 },
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{ 52.00, 0.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601, 0, 52.209976, 0.176507 },
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{ 52.00, 10.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601, 0, 52.209976, 0.176507 },
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{ 52.00, 40.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601, 0, 52.209976, 0.176507 },
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{ 52.00, 50.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601 + 90.0, 0, 52.209976, 0.176507 + 90.0 },
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{ 52.00, 130.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601 + 90.0, 0, 52.209976, 0.176507 + 90.0 },
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{ 52.00, 140.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601 - 180.0, 0, 52.209976, 0.176507 - 180.0 },
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{ 52.00, 180.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601 - 180.0, 0, 52.209976, 0.176507 - 180.0 },
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// latitude quadrants (but only 2). The decoded longitude also changes because the cell size changes with latitude
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{ 90.00, 0.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601, 0, 52.209976, 0.176507 },
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{ 52.00, 0.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601, 0, 52.209976, 0.176507 },
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{ 8.00, 0.00, 105730, 9259, 29693, 8997, 0, 52.209984, 0.176601, 0, 52.209976, 0.176507 },
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{ 7.00, 0.00, 105730, 9259, 29693, 8997, 0, 52.209984 - 90.0, 0.135269, 0, 52.209976 - 90.0, 0.134299 },
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{ -52.00, 0.00, 105730, 9259, 29693, 8997, 0, 52.209984 - 90.0, 0.135269, 0, 52.209976 - 90.0, 0.134299 },
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{ -90.00, 0.00, 105730, 9259, 29693, 8997, 0, 52.209984 - 90.0, 0.135269, 0, 52.209976 - 90.0, 0.134299 },
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2015-08-17 19:06:37 +02:00
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// poles/equator cases
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{ -46.00, -180.00, 0, 0, 0, 0, 0, -90.0, -180.000000, 0, -90.0, -180.0 }, // south pole
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{ -44.00, -180.00, 0, 0, 0, 0, 0, 0.0, -180.000000, 0, 0.0, -180.0 }, // equator
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{ 44.00, -180.00, 0, 0, 0, 0, 0, 0.0, -180.000000, 0, 0.0, -180.0 }, // equator
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{ 46.00, -180.00, 0, 0, 0, 0, 0, 90.0, -180.000000, 0, 90.0, -180.0 }, // north pole
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2015-01-20 19:41:44 +01:00
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};
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// Relative CPR test data:
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static const struct {
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double reflat, reflon; // input: reference location for decoding
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int cprlat, cprlon; // input: raw CPR values, even or odd message
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int fflag; // input: fflag in raw message
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int surface; // input: decode as air (0) or surface (1) position
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int result; // verify: expected result
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double rlat, rlon; // verify: expected position
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} cprRelativeTests[] = {
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//
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// AIRBORNE
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//
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{ 52.00, 0.00, 80536, 9432, 0, 0, 0, 51.686646, 0.700156 }, // even, airborne
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{ 52.00, 0.00, 61720, 9192, 1, 0, 0, 51.686763, 0.701294 }, // odd, airborne
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{ 52.00, 0.00, 80534, 9413, 0, 0, 0, 51.686554, 0.698745 }, // even, airborne
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{ 52.00, 0.00, 61714, 9144, 1, 0, 0, 51.686484, 0.697632 }, // odd, airborne
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// test moving the receiver around a bit
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// We cannot move it more than 1/2 cell away before ambiguity happens.
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// latitude must be within about 3 degrees (cell size is 360/60 = 6 degrees)
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{ 48.70, 0.00, 80536, 9432, 0, 0, 0, 51.686646, 0.700156 }, // even, airborne
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{ 48.70, 0.00, 61720, 9192, 1, 0, 0, 51.686763, 0.701294 }, // odd, airborne
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{ 48.70, 0.00, 80534, 9413, 0, 0, 0, 51.686554, 0.698745 }, // even, airborne
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{ 48.70, 0.00, 61714, 9144, 1, 0, 0, 51.686484, 0.697632 }, // odd, airborne
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{ 54.60, 0.00, 80536, 9432, 0, 0, 0, 51.686646, 0.700156 }, // even, airborne
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{ 54.60, 0.00, 61720, 9192, 1, 0, 0, 51.686763, 0.701294 }, // odd, airborne
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{ 54.60, 0.00, 80534, 9413, 0, 0, 0, 51.686554, 0.698745 }, // even, airborne
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{ 54.60, 0.00, 61714, 9144, 1, 0, 0, 51.686484, 0.697632 }, // odd, airborne
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// longitude must be within about 4.8 degrees at this latitude
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{ 52.00, 5.40, 80536, 9432, 0, 0, 0, 51.686646, 0.700156 }, // even, airborne
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{ 52.00, 5.40, 61720, 9192, 1, 0, 0, 51.686763, 0.701294 }, // odd, airborne
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{ 52.00, 5.40, 80534, 9413, 0, 0, 0, 51.686554, 0.698745 }, // even, airborne
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{ 52.00, 5.40, 61714, 9144, 1, 0, 0, 51.686484, 0.697632 }, // odd, airborne
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{ 52.00, -4.10, 80536, 9432, 0, 0, 0, 51.686646, 0.700156 }, // even, airborne
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{ 52.00, -4.10, 61720, 9192, 1, 0, 0, 51.686763, 0.701294 }, // odd, airborne
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{ 52.00, -4.10, 80534, 9413, 0, 0, 0, 51.686554, 0.698745 }, // even, airborne
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{ 52.00, -4.10, 61714, 9144, 1, 0, 0, 51.686484, 0.697632 }, // odd, airborne
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//
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// SURFACE
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//
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// Surface position on the Cambridge (UK) airport apron at 52.21N 0.18E
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{ 52.00, 0.00, 105730, 9259, 0, 1, 0, 52.209984, 0.176601 }, // even, surface
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{ 52.00, 0.00, 29693, 8997, 1, 1, 0, 52.209976, 0.176507 }, // odd, surface
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// test moving the receiver around a bit
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// We cannot move it more than 1/2 cell away before ambiguity happens.
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// latitude must be within about 0.75 degrees (cell size is 90/60 = 1.5 degrees)
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{ 51.46, 0.00, 105730, 9259, 0, 1, 0, 52.209984, 0.176601 }, // even, surface
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{ 51.46, 0.00, 29693, 8997, 1, 1, 0, 52.209976, 0.176507 }, // odd, surface
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{ 52.95, 0.00, 105730, 9259, 0, 1, 0, 52.209984, 0.176601 }, // even, surface
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{ 52.95, 0.00, 29693, 8997, 1, 1, 0, 52.209976, 0.176507 }, // odd, surface
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// longitude must be within about 1.25 degrees at this latitude
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{ 52.00, 1.40, 105730, 9259, 0, 1, 0, 52.209984, 0.176601 }, // even, surface
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{ 52.00, 1.40, 29693, 8997, 1, 1, 0, 52.209976, 0.176507 }, // odd, surface
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{ 52.00, -1.05, 105730, 9259, 0, 1, 0, 52.209984, 0.176601 }, // even, surface
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{ 52.00, -1.05, 29693, 8997, 1, 1, 0, 52.209976, 0.176507 }, // odd, surface
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};
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static int testCPRGlobalAirborne() {
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int ok = 1;
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unsigned i;
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for (i = 0; i < sizeof(cprGlobalAirborneTests)/sizeof(cprGlobalAirborneTests[0]); ++i) {
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double rlat = 0, rlon = 0;
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int res;
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res = decodeCPRairborne(cprGlobalAirborneTests[i].even_cprlat, cprGlobalAirborneTests[i].even_cprlon,
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cprGlobalAirborneTests[i].odd_cprlat, cprGlobalAirborneTests[i].odd_cprlon,
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0,
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&rlat, &rlon);
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if (res != cprGlobalAirborneTests[i].even_result
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|| fabs(rlat - cprGlobalAirborneTests[i].even_rlat) > 1e-6
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|| fabs(rlon - cprGlobalAirborneTests[i].even_rlon) > 1e-6) {
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ok = 0;
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fprintf(stderr,
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2016-04-05 20:05:41 +02:00
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"testCPRGlobalAirborne[%u,EVEN]: FAIL: decodeCPRairborne(%d,%d,%d,%d,EVEN) failed:\n"
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2015-01-20 19:41:44 +01:00
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" result %d (expected %d)\n"
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" lat %.6f (expected %.6f)\n"
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" lon %.6f (expected %.6f)\n",
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i,
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cprGlobalAirborneTests[i].even_cprlat, cprGlobalAirborneTests[i].even_cprlon,
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cprGlobalAirborneTests[i].odd_cprlat, cprGlobalAirborneTests[i].odd_cprlon,
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res, cprGlobalAirborneTests[i].even_result,
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rlat, cprGlobalAirborneTests[i].even_rlat,
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rlon, cprGlobalAirborneTests[i].even_rlon);
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} else {
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2016-04-05 20:05:41 +02:00
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fprintf(stderr, "testCPRGlobalAirborne[%u,EVEN]: PASS\n", i);
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2015-01-20 19:41:44 +01:00
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}
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res = decodeCPRairborne(cprGlobalAirborneTests[i].even_cprlat, cprGlobalAirborneTests[i].even_cprlon,
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cprGlobalAirborneTests[i].odd_cprlat, cprGlobalAirborneTests[i].odd_cprlon,
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1,
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&rlat, &rlon);
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if (res != cprGlobalAirborneTests[i].odd_result
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|| fabs(rlat - cprGlobalAirborneTests[i].odd_rlat) > 1e-6
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|| fabs(rlon - cprGlobalAirborneTests[i].odd_rlon) > 1e-6) {
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ok = 0;
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fprintf(stderr,
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2016-04-05 20:05:41 +02:00
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"testCPRGlobalAirborne[%u,ODD]: FAIL: decodeCPRairborne(%d,%d,%d,%d,ODD) failed:\n"
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2015-01-20 19:41:44 +01:00
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" result %d (expected %d)\n"
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" lat %.6f (expected %.6f)\n"
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" lon %.6f (expected %.6f)\n",
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i,
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cprGlobalAirborneTests[i].even_cprlat, cprGlobalAirborneTests[i].even_cprlon,
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cprGlobalAirborneTests[i].odd_cprlat, cprGlobalAirborneTests[i].odd_cprlon,
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res, cprGlobalAirborneTests[i].odd_result,
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rlat, cprGlobalAirborneTests[i].odd_rlat,
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rlon, cprGlobalAirborneTests[i].odd_rlon);
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} else {
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2016-04-05 20:05:41 +02:00
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fprintf(stderr, "testCPRGlobalAirborne[%u,ODD]: PASS\n", i);
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2015-01-20 19:41:44 +01:00
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}
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}
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return ok;
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}
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static int testCPRGlobalSurface() {
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int ok = 1;
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unsigned i;
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for (i = 0; i < sizeof(cprGlobalSurfaceTests)/sizeof(cprGlobalSurfaceTests[0]); ++i) {
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double rlat = 0, rlon = 0;
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int res;
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res = decodeCPRsurface(cprGlobalSurfaceTests[i].reflat, cprGlobalSurfaceTests[i].reflon,
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cprGlobalSurfaceTests[i].even_cprlat, cprGlobalSurfaceTests[i].even_cprlon,
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cprGlobalSurfaceTests[i].odd_cprlat, cprGlobalSurfaceTests[i].odd_cprlon,
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0,
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&rlat, &rlon);
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if (res != cprGlobalSurfaceTests[i].even_result
|
|
|
|
|
|| fabs(rlat - cprGlobalSurfaceTests[i].even_rlat) > 1e-6
|
|
|
|
|
|| fabs(rlon - cprGlobalSurfaceTests[i].even_rlon) > 1e-6) {
|
|
|
|
|
ok = 0;
|
|
|
|
|
fprintf(stderr,
|
2016-04-05 20:05:41 +02:00
|
|
|
"testCPRGlobalSurface[%u,EVEN]: FAIL: decodeCPRsurface(%.6f,%.6f,%d,%d,%d,%d,EVEN) failed:\n"
|
2015-01-20 19:41:44 +01:00
|
|
|
" result %d (expected %d)\n"
|
|
|
|
|
" lat %.6f (expected %.6f)\n"
|
|
|
|
|
" lon %.6f (expected %.6f)\n",
|
|
|
|
|
i,
|
|
|
|
|
cprGlobalSurfaceTests[i].reflat, cprGlobalSurfaceTests[i].reflon,
|
|
|
|
|
cprGlobalSurfaceTests[i].even_cprlat, cprGlobalSurfaceTests[i].even_cprlon,
|
|
|
|
|
cprGlobalSurfaceTests[i].odd_cprlat, cprGlobalSurfaceTests[i].odd_cprlon,
|
|
|
|
|
res, cprGlobalSurfaceTests[i].even_result,
|
|
|
|
|
rlat, cprGlobalSurfaceTests[i].even_rlat,
|
|
|
|
|
rlon, cprGlobalSurfaceTests[i].even_rlon);
|
|
|
|
|
} else {
|
2016-04-05 20:05:41 +02:00
|
|
|
fprintf(stderr, "testCPRGlobalSurface[%u,EVEN]: PASS\n", i);
|
2015-01-20 19:41:44 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
res = decodeCPRsurface(cprGlobalSurfaceTests[i].reflat, cprGlobalSurfaceTests[i].reflon,
|
|
|
|
|
cprGlobalSurfaceTests[i].even_cprlat, cprGlobalSurfaceTests[i].even_cprlon,
|
|
|
|
|
cprGlobalSurfaceTests[i].odd_cprlat, cprGlobalSurfaceTests[i].odd_cprlon,
|
|
|
|
|
1,
|
|
|
|
|
&rlat, &rlon);
|
|
|
|
|
if (res != cprGlobalSurfaceTests[i].odd_result
|
|
|
|
|
|| fabs(rlat - cprGlobalSurfaceTests[i].odd_rlat) > 1e-6
|
|
|
|
|
|| fabs(rlon - cprGlobalSurfaceTests[i].odd_rlon) > 1e-6) {
|
|
|
|
|
ok = 0;
|
|
|
|
|
fprintf(stderr,
|
2016-04-05 20:05:41 +02:00
|
|
|
"testCPRGlobalSurface[%u,ODD]: FAIL: decodeCPRsurface(%.6f,%.6f,%d,%d,%d,%d,ODD) failed:\n"
|
2015-01-20 19:41:44 +01:00
|
|
|
" result %d (expected %d)\n"
|
|
|
|
|
" lat %.6f (expected %.6f)\n"
|
|
|
|
|
" lon %.6f (expected %.6f)\n",
|
|
|
|
|
i,
|
|
|
|
|
cprGlobalSurfaceTests[i].reflat, cprGlobalSurfaceTests[i].reflon,
|
|
|
|
|
cprGlobalSurfaceTests[i].even_cprlat, cprGlobalSurfaceTests[i].even_cprlon,
|
|
|
|
|
cprGlobalSurfaceTests[i].odd_cprlat, cprGlobalSurfaceTests[i].odd_cprlon,
|
|
|
|
|
res, cprGlobalSurfaceTests[i].odd_result,
|
|
|
|
|
rlat, cprGlobalSurfaceTests[i].odd_rlat,
|
|
|
|
|
rlon, cprGlobalSurfaceTests[i].odd_rlon);
|
|
|
|
|
} else {
|
2016-04-05 20:05:41 +02:00
|
|
|
fprintf(stderr, "testCPRGlobalSurface[%u,ODD]: PASS\n", i);
|
2015-01-20 19:41:44 +01:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ok;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static int testCPRRelative() {
|
|
|
|
|
int ok = 1;
|
|
|
|
|
unsigned i;
|
|
|
|
|
for (i = 0; i < sizeof(cprRelativeTests)/sizeof(cprRelativeTests[0]); ++i) {
|
|
|
|
|
double rlat = 0, rlon = 0;
|
|
|
|
|
int res;
|
|
|
|
|
|
|
|
|
|
res = decodeCPRrelative(cprRelativeTests[i].reflat, cprRelativeTests[i].reflon,
|
|
|
|
|
cprRelativeTests[i].cprlat, cprRelativeTests[i].cprlon,
|
|
|
|
|
cprRelativeTests[i].fflag, cprRelativeTests[i].surface,
|
|
|
|
|
&rlat, &rlon);
|
|
|
|
|
if (res != cprRelativeTests[i].result
|
|
|
|
|
|| fabs(rlat - cprRelativeTests[i].rlat) > 1e-6
|
|
|
|
|
|| fabs(rlon - cprRelativeTests[i].rlon) > 1e-6) {
|
|
|
|
|
ok = 0;
|
|
|
|
|
fprintf(stderr,
|
2016-04-05 20:05:41 +02:00
|
|
|
"testCPRRelative[%u]: FAIL: decodeCPRrelative(%.6f,%.6f,%d,%d,%d,%d) failed:\n"
|
2015-01-20 19:41:44 +01:00
|
|
|
" result %d (expected %d)\n"
|
|
|
|
|
" lat %.6f (expected %.6f)\n"
|
|
|
|
|
" lon %.6f (expected %.6f)\n",
|
|
|
|
|
i,
|
|
|
|
|
cprRelativeTests[i].reflat, cprRelativeTests[i].reflon,
|
|
|
|
|
cprRelativeTests[i].cprlat, cprRelativeTests[i].cprlon,
|
|
|
|
|
cprRelativeTests[i].fflag, cprRelativeTests[i].surface,
|
|
|
|
|
res, cprRelativeTests[i].result,
|
|
|
|
|
rlat, cprRelativeTests[i].rlat,
|
|
|
|
|
rlon, cprRelativeTests[i].rlon);
|
|
|
|
|
} else {
|
2016-04-05 20:05:41 +02:00
|
|
|
fprintf(stderr, "testCPRRelative[%u]: PASS\n", i);
|
2015-01-20 19:41:44 +01:00
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return ok;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
int main(int __attribute__ ((unused)) argc, char __attribute__ ((unused)) **argv) {
|
|
|
|
|
int ok = 1;
|
|
|
|
|
ok = testCPRGlobalAirborne() && ok;
|
|
|
|
|
ok = testCPRGlobalSurface() && ok;
|
|
|
|
|
ok = testCPRRelative() && ok;
|
|
|
|
|
return ok ? 0 : 1;
|
|
|
|
|
}
|
