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/*
* ViSP, open source Visual Servoing Platform software.
* Copyright (C) 2005 - 2024 by Inria. All rights reserved.
*
* This software is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* See the file LICENSE.txt at the root directory of this source
* distribution for additional information about the GNU GPL.
*
* For using ViSP with software that can not be combined with the GNU
* GPL, please contact Inria about acquiring a ViSP Professional
* Edition License.
*
* See https://visp.inria.fr for more information.
*
* This software was developed at:
* Inria Rennes - Bretagne Atlantique
* Campus Universitaire de Beaulieu
* 35042 Rennes Cedex
* France
*
* If you have questions regarding the use of this file, please contact
* Inria at visp@inria.fr
*
* This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
* WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* Description:
* Test vpEndian.
*/
/*!
\example catchEndian.cpp
*/
#include <iostream>
#include <visp3/core/vpConfig.h>
#include <visp3/core/vpEndian.h>
#if defined(VISP_HAVE_EIGEN3) && defined(VISP_HAVE_CATCH2)
#include <catch_amalgamated.hpp>
#ifdef ENABLE_VISP_NAMESPACE
using namespace VISP_NAMESPACE_NAME;
#endif
TEST_CASE("Test reinterpret_cast_uchar_to_uint16_LE", "[vpEndian_test]")
{
unsigned char bitmap[] = { 100, 110, 120, 130 };
uint16_t val01 = vpEndian::reinterpret_cast_uchar_to_uint16_LE(bitmap);
uint16_t val12 = vpEndian::reinterpret_cast_uchar_to_uint16_LE(bitmap + 2);
CHECK((val01 & 0x00FF) == bitmap[0]);
CHECK(((val01 & 0xFF00) >> 8) == bitmap[1]);
CHECK((val01 >> 8) == bitmap[1]);
CHECK((val12 & 0x00FF) == bitmap[2]);
CHECK(((val12 & 0xFF00) >> 8) == bitmap[3]);
CHECK((val12 >> 8) == bitmap[3]);
}
TEST_CASE("Test bitwise shift operators and zero fill", "[vpEndian_test]")
{
// https://docs.microsoft.com/en-us/cpp/cpp/left-shift-and-right-shift-operators-input-and-output?view=vs-2019
// https://devblogs.microsoft.com/cppblog/hello-arm-exploring-undefined-unspecified-and-implementation-defined-behavior-in-c/
for (uint16_t i = 0; i < 60000; i += 500) {
REQUIRE(((i >> 8) & 0x00FF) == (i >> 8));
}
}
TEST_CASE("Test endianness conversion", "[vpEndian_test]")
{
SECTION("LE --> BE --> LE / BE --> LE --> BE")
{
SECTION("uint16_t")
{
uint16_t val_LE = 123;
uint16_t val_LE_2_BE = vpEndian::swap16bits(val_LE);
CHECK(val_LE == vpEndian::swap16bits(val_LE_2_BE));
}
SECTION("int16_t")
{
int16_t val_LE = -123;
int16_t val_LE_2_BE = static_cast<int16_t>(vpEndian::swap16bits(static_cast<uint16_t>(val_LE)));
CHECK(val_LE == static_cast<int16_t>(vpEndian::swap16bits(static_cast<uint16_t>(val_LE_2_BE))));
}
SECTION("uint32_t")
{
uint32_t val_LE = 123456;
uint32_t val_LE_2_BE = vpEndian::swap32bits(val_LE);
CHECK(val_LE == vpEndian::swap32bits(val_LE_2_BE));
}
SECTION("int32_t")
{
int32_t val_LE = -123456;
int32_t val_LE_2_BE = static_cast<int32_t>(vpEndian::swap32bits(static_cast<uint32_t>(val_LE)));
CHECK(val_LE == static_cast<int32_t>(vpEndian::swap32bits(static_cast<uint32_t>(val_LE_2_BE))));
}
SECTION("uint64_t")
{
uint64_t val_LE = 12345678900;
uint64_t val_LE_2_BE = vpEndian::swap64bits(val_LE);
CHECK(val_LE == vpEndian::swap64bits(val_LE_2_BE));
}
SECTION("int64_t")
{
int64_t val_LE = -12345678900;
int64_t val_LE_2_BE = static_cast<int64_t>(vpEndian::swap64bits(static_cast<uint64_t>(val_LE)));
CHECK(val_LE == static_cast<int64_t>(vpEndian::swap64bits(static_cast<uint64_t>(val_LE_2_BE))));
}
SECTION("float")
{
float val_LE = 3.14f;
float val_LE_2_BE = vpEndian::swapFloat(val_LE);
CHECK(val_LE == Catch::Approx((vpEndian::swapFloat(val_LE_2_BE))).epsilon(std::numeric_limits<float>::epsilon()));
}
SECTION("double")
{
double val_LE = 3.14;
double val_LE_2_BE = vpEndian::swapDouble(val_LE);
CHECK(val_LE == Catch::Approx((vpEndian::swapDouble(val_LE_2_BE))).epsilon(std::numeric_limits<double>::epsilon()));
}
}
}
TEST_CASE("Test endianness detection", "[vpEndian_test]")
{
bool is_big_endian = vpEndian::isBigEndian();
#ifdef VISP_BIG_ENDIAN
CHECK(is_big_endian);
#else
CHECK_FALSE(is_big_endian);
#endif
}
int main(int argc, char *argv[])
{
#if defined(VISP_LITTLE_ENDIAN)
std::cout << "Detected endianess: LE" << std::endl;
#elif defined(VISP_BIG_ENDIAN)
std::cout << "Detected endianess: BE" << std::endl;
#elif defined(VISP_PDB_ENDIAN)
std::cout << "Detected endianess: PDB" << std::endl;
#else
std::cout << "Detected endianess: unknown" << std::endl;
#endif
Catch::Session session;
session.applyCommandLine(argc, argv);
int numFailed = session.run();
return numFailed;
}
#else
int main() { return EXIT_SUCCESS; }
#endif
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