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FPETest.cpp
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executable file
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//
// FPETest.cpp
//
// $Id: //poco/1.4/Foundation/testsuite/src/FPETest.cpp#1 $
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "FPETest.h"
#include "CppUnit/TestCaller.h"
#include "CppUnit/TestSuite.h"
#include "Poco/FPEnvironment.h"
using Poco::FPE;
FPETest::FPETest(const std::string& name): CppUnit::TestCase(name)
{
}
FPETest::~FPETest()
{
}
void FPETest::testClassify()
{
{
float a = 0.0f;
float b = 0.0f;
float nan = a/b;
float inf = 1.0f/b;
assert (FPE::isNaN(nan));
assert (!FPE::isNaN(a));
assert (FPE::isInfinite(inf));
assert (!FPE::isInfinite(a));
}
{
double a = 0;
double b = 0;
double nan = a/b;
double inf = 1.0/b;
assert (FPE::isNaN(nan));
assert (!FPE::isNaN(a));
assert (FPE::isInfinite(inf));
assert (!FPE::isInfinite(a));
}
}
#if defined(__HP_aCC)
#pragma OPTIMIZE OFF
#elif defined(_MSC_VER)
#pragma optimize("", off)
#elif defined(__APPLE__) && defined(POCO_COMPILER_GCC)
#pragma GCC optimization_level 0
#endif
double mult(double a, double b)
{
return a*b;
}
double div(double a, double b)
{
return a/b;
}
void FPETest::testFlags()
{
FPE::clearFlags();
// some compilers are intelligent enough to optimize the calculations below away.
// unfortunately this leads to a failing test, so we have to trick out the
// compiler's optimizer a little bit by doing something with the results.
volatile double a = 10;
volatile double b = 0;
volatile double c = div(a, b);
assert (FPE::isFlag(FPE::FP_DIVIDE_BY_ZERO));
assert (FPE::isInfinite(c));
FPE::clearFlags();
a = 1.23456789e210;
b = 9.87654321e210;
c = mult(a, b);
assert (FPE::isFlag(FPE::FP_OVERFLOW));
assertEqualDelta(c, c, 0);
FPE::clearFlags();
a = 1.23456789e-99;
b = 9.87654321e210;
c = div(a, b);
assert (FPE::isFlag(FPE::FP_UNDERFLOW));
assertEqualDelta(c, c, 0);
}
#if defined(__HP_aCC)
#pragma OPTIMIZE ON
#elif defined(_MSC_VER)
#pragma optimize("", on)
#elif defined(__APPLE__) && defined(POCO_COMPILER_GCC)
#pragma GCC optimization_level reset
#endif
void FPETest::testRound()
{
#if !defined(__osf__) && !defined(__VMS)
FPE::setRoundingMode(FPE::FP_ROUND_TONEAREST);
assert (FPE::getRoundingMode() == FPE::FP_ROUND_TONEAREST);
{
FPE env(FPE::FP_ROUND_TOWARDZERO);
assert (FPE::getRoundingMode() == FPE::FP_ROUND_TOWARDZERO);
}
assert (FPE::getRoundingMode() == FPE::FP_ROUND_TONEAREST);
#endif
}
void FPETest::setUp()
{
}
void FPETest::tearDown()
{
}
CppUnit::Test* FPETest::suite()
{
CppUnit::TestSuite* pSuite = new CppUnit::TestSuite("FPETest");
CppUnit_addTest(pSuite, FPETest, testClassify);
CppUnit_addTest(pSuite, FPETest, testFlags);
CppUnit_addTest(pSuite, FPETest, testRound);
return pSuite;
}