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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "itkMath.h"
#include <iostream>
namespace
{
// we validate the results against just converting the numbers to
// doubles. This will work for all integers less then 32-bit but is
// not always exact with larger integers.
template <typename T1, typename T2>
bool
DoCastWithRangeCheckTestVerify(const T2 value, const T1 = 0)
{
T1 ret;
// tying to convert T2 to T1
try
{
ret = itk::Math::CastWithRangeCheck<T1>(value);
// value should match
if (itk::Math::NotExactlyEquals(static_cast<double>(ret), static_cast<double>(value)))
{
std::cout << "casting error with input value: " << static_cast<typename itk::NumericTraits<T2>::PrintType>(value)
<< " output value: " << static_cast<typename itk::NumericTraits<T1>::PrintType>(ret) << std::endl;
return false;
}
}
catch (...)
{
// conversion should result in some overflow problem
auto retCheck = static_cast<T1>(value);
if (itk::Math::ExactlyEquals(static_cast<double>(retCheck), static_cast<double>(value)))
{
std::cout << "unexpected exception with value: " << value << std::endl;
return false;
}
}
return true;
}
template <typename T1, typename T2>
bool
DoCastWithRangeCheckTestExulstive(const T1 * = nullptr, const T2 * = nullptr)
{
// test convert T2 to T1
bool pass = true;
for (T2 i = itk::NumericTraits<T2>::NonpositiveMin(); i != itk::NumericTraits<T2>::max(); ++i)
{
pass &= DoCastWithRangeCheckTestVerify<T1, T2>(i);
}
return pass;
}
template <typename T1, typename T2>
bool
DoCastWithRangeCheckTest(const T1 * = nullptr, const T2 * = nullptr)
{
int minus_one = -1;
// test convert T2 to T1
bool pass = true;
pass &= DoCastWithRangeCheckTestVerify<T1, T2>(itk::NumericTraits<T2>::NonpositiveMin());
pass &= DoCastWithRangeCheckTestVerify<T1, T2>(itk::NumericTraits<T2>::max());
pass &= DoCastWithRangeCheckTestVerify<T1, T2>(T2{});
pass &= DoCastWithRangeCheckTestVerify<T1, T2>(itk::NumericTraits<T2>::OneValue());
pass &= DoCastWithRangeCheckTestVerify<T1, T2>(static_cast<T2>(itk::NumericTraits<T2>::OneValue() * minus_one));
return pass;
}
template <typename T1>
bool
DoCastWithRangeCheckTestForTypes(const T1 * = nullptr)
{
// call method for all type to be converted to type T1
bool pass = true;
pass &= DoCastWithRangeCheckTest<T1, unsigned char>();
pass &= DoCastWithRangeCheckTest<T1, signed char>();
pass &= DoCastWithRangeCheckTest<T1, unsigned short>();
pass &= DoCastWithRangeCheckTest<T1, short>();
pass &= DoCastWithRangeCheckTest<T1, unsigned int>();
pass &= DoCastWithRangeCheckTest<T1, int>();
pass &= DoCastWithRangeCheckTest<T1, unsigned long>();
pass &= DoCastWithRangeCheckTest<T1, long>();
#ifdef ITK_USE_LONG_LONG
pass &= DoCastWithRangeCheckTest<T1, unsigned long long>();
pass &= DoCastWithRangeCheckTest<T1, long long>();
#endif
return pass;
}
} // end namespace
int
itkMathCastWithRangeCheckTest(int, char *[])
{
bool pass = true;
try
{
itk::Math::CastWithRangeCheck<short, int>(static_cast<int>(itk::NumericTraits<short>::max()) + 10);
pass = false;
std::cout << "failed to through exception with " << static_cast<int>(itk::NumericTraits<short>::max()) + 10
<< " to int ";
}
catch (...)
{
std::cout << "caught exception as expected" << std::endl;
}
DoCastWithRangeCheckTestExulstive<signed char, unsigned char>();
DoCastWithRangeCheckTestExulstive<unsigned char, signed char>();
DoCastWithRangeCheckTestExulstive<unsigned char, short>();
DoCastWithRangeCheckTestExulstive<signed char, short>();
DoCastWithRangeCheckTestExulstive<unsigned int, signed char>();
pass &= DoCastWithRangeCheckTestForTypes<unsigned char>();
pass &= DoCastWithRangeCheckTestForTypes<signed char>();
pass &= DoCastWithRangeCheckTestForTypes<unsigned short>();
pass &= DoCastWithRangeCheckTestForTypes<short>();
pass &= DoCastWithRangeCheckTestForTypes<unsigned int>();
pass &= DoCastWithRangeCheckTestForTypes<int>();
pass &= DoCastWithRangeCheckTestForTypes<unsigned long>();
pass &= DoCastWithRangeCheckTestForTypes<long>();
#ifdef ITK_USE_LONG_LONG
pass &= DoCastWithRangeCheckTestForTypes<unsigned long long>();
pass &= DoCastWithRangeCheckTestForTypes<long long>();
#endif
if (pass)
{
return EXIT_SUCCESS;
}
else
{
return EXIT_FAILURE;
}
}
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