Visual Servoing Platform version 3.5.0
testEndian.cpp
1/****************************************************************************
2 *
3 * ViSP, open source Visual Servoing Platform software.
4 * Copyright (C) 2005 - 2019 by Inria. All rights reserved.
5 *
6 * This software is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 * See the file LICENSE.txt at the root directory of this source
11 * distribution for additional information about the GNU GPL.
12 *
13 * For using ViSP with software that can not be combined with the GNU
14 * GPL, please contact Inria about acquiring a ViSP Professional
15 * Edition License.
16 *
17 * See http://visp.inria.fr for more information.
18 *
19 * This software was developed at:
20 * Inria Rennes - Bretagne Atlantique
21 * Campus Universitaire de Beaulieu
22 * 35042 Rennes Cedex
23 * France
24 *
25 * If you have questions regarding the use of this file, please contact
26 * Inria at visp@inria.fr
27 *
28 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
29 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
30 *
31 * Description:
32 * Test vpEndian.
33 *
34 *****************************************************************************/
35
36#include <iostream>
37#include <visp3/core/vpConfig.h>
38#include <visp3/core/vpEndian.h>
39
40#if defined(VISP_HAVE_EIGEN3) && defined(VISP_HAVE_CATCH2)
41#define CATCH_CONFIG_RUNNER
42#include <catch.hpp>
43
44TEST_CASE("Test reinterpret_cast_uchar_to_uint16_LE", "[vpEndian_test]") {
45 unsigned char bitmap[] = {100, 110, 120, 130};
46 uint16_t val01 = vpEndian::reinterpret_cast_uchar_to_uint16_LE(bitmap);
47 uint16_t val12 = vpEndian::reinterpret_cast_uchar_to_uint16_LE(bitmap + 2);
48
49 CHECK((val01 & 0x00FF) == bitmap[0]);
50 CHECK(((val01 & 0xFF00) >> 8) == bitmap[1]);
51 CHECK((val01 >> 8) == bitmap[1]);
52
53 CHECK((val12 & 0x00FF) == bitmap[2]);
54 CHECK(((val12 & 0xFF00) >> 8) == bitmap[3]);
55 CHECK((val12 >> 8)== bitmap[3]);
56}
57
58TEST_CASE("Test bitwise shift operators and zero fill", "[vpEndian_test]") {
59 //https://docs.microsoft.com/en-us/cpp/cpp/left-shift-and-right-shift-operators-input-and-output?view=vs-2019
60 //https://devblogs.microsoft.com/cppblog/hello-arm-exploring-undefined-unspecified-and-implementation-defined-behavior-in-c/
61 for (uint16_t i = 0; i < 60000; i += 500) {
62 REQUIRE(((i >> 8) & 0x00FF) == (i >> 8));
63 }
64}
65
66int main(int argc, char *argv[])
67{
68#if defined(VISP_LITTLE_ENDIAN)
69 std::cout << "Detected endianess: LE" << std::endl;
70#elif defined(VISP_BIG_ENDIAN)
71 std::cout << "Detected endianess: BE" << std::endl;
72#elif defined(VISP_PDB_ENDIAN)
73 std::cout << "Detected endianess: PDB" << std::endl;
74#else
75 std::cout << "Detected endianess: unknown" << std::endl;
76#endif
77
78 Catch::Session session; // There must be exactly one instance
79
80 // Let Catch (using Clara) parse the command line
81 session.applyCommandLine(argc, argv);
82
83 int numFailed = session.run();
84
85 // numFailed is clamped to 255 as some unices only use the lower 8 bits.
86 // This clamping has already been applied, so just return it here
87 // You can also do any post run clean-up here
88 return numFailed;
89}
90#else
91int main()
92{
93 return 0;
94}
95#endif
VISP_EXPORT uint16_t reinterpret_cast_uchar_to_uint16_LE(unsigned char *const ptr)
Definition: vpEndian.cpp:111