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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 "itkFloatingPointExceptions.h"
#include <iostream>
#include <cfloat>
#include <set>
// constants declared in another compilation unit to prevent
// compilation time errors for divide by zero and overflow
extern const double itkFloatingPointExceptionsTest_double_zero;
extern const double itkFloatingPointExceptionsTest_double_max;
int
itkFloatingPointExceptionsTest(int argc, char * argv[])
{
itk::FloatingPointExceptions::Enable();
itk::FloatingPointExceptions::SetExceptionAction(itk::FloatingPointExceptions::ExceptionActionEnum::EXIT);
if (argc < 2)
{
std::cout << "No test specified" << std::endl;
return 1;
}
int error_return(0);
double double_zero = itkFloatingPointExceptionsTest_double_zero;
double double_max = itkFloatingPointExceptionsTest_double_max;
double test1 = itkFloatingPointExceptionsTest_double_zero;
std::string testName(argv[1]);
if (testName == "DivByZero")
{
std::cout << "Testing floating point divide by zero" << std::endl;
std::cout.flush();
try
{
double s = 1.0 / double_zero;
//
// should never reach here
std::cout << "Divide by Zero Exception not caught"
<< " result is " << s << std::endl;
error_return++;
}
catch (const itk::ExceptionObject & e)
{
std::cout << "Expected divide by zero exception caught" << std::endl;
std::cout << e;
std::cout.flush();
}
}
if (testName == "ZeroDivByZero")
{
std::cout << "Testing floating point zero divided by zero" << std::endl;
std::cout.flush();
try
{
double s = test1 / double_zero;
//
// should never reach here
std::cout << "Zero divide by Zero Exception not caught"
<< " result is " << s << std::endl;
error_return++;
}
catch (const itk::ExceptionObject & e)
{
std::cout << "Expected 0.0 / 0.0 exception caught" << std::endl;
std::cout << e;
std::cout.flush();
}
}
if (testName == "FPOverflow")
{
std::cout << "Testing floating point overflow" << std::endl;
std::cout.flush();
try
{
double s = double_max;
s = s * s;
//
// should never reach here
std::cout << "Overflow Exception not caught"
<< " result is " << s << std::endl;
error_return++;
}
catch (const itk::ExceptionObject & e)
{
std::cout << "Overflow exception caught" << std::endl;
std::cout << e;
std::cout.flush();
}
}
if (testName == "FPUnderflow")
{
std::cout << "Testing floating point underflow" << std::endl;
std::cout.flush();
// not caught as SIGFPE apparently
try
{
double s = DBL_MIN;
s = s / double_max;
//
// should never reach here
std::cout << "Underflow Exception not caught"
<< " result is " << s << std::endl;
error_return++;
}
catch (const itk::ExceptionObject & e)
{
std::cout << "Underflow exception caught" << std::endl;
std::cout << e;
}
}
// Test streaming enumeration for FloatingPointExceptionsEnums::ExceptionAction elements
const std::set<itk::FloatingPointExceptionsEnums::ExceptionAction> allExceptionAction{
itk::FloatingPointExceptionsEnums::ExceptionAction::ABORT, itk::FloatingPointExceptionsEnums::ExceptionAction::EXIT
};
for (const auto & ee : allExceptionAction)
{
std::cout << "STREAMED ENUM VALUE FloatingPointExceptionsEnums::ExceptionAction: " << ee << std::endl;
}
return error_return;
}
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