fpetest.cpp

This software aims to create an applet and panel tools to manage a wireless interface card, such as

//
// FPETest.cpp
//
// $Id: //poco/Main/Foundation/testsuite/src/FPETest.cpp#5 $
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// POSSIBILITY OF SUCH DAMAGE.
//


#include "FPETest.h"
#include "CppUnit/TestCaller.h"
#include "CppUnit/TestSuite.h"
#include "Foundation/FPEnvironment.h"


using Foundation::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)
#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.
	double a = 10;
	double b = 0;
	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)
#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;
}