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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you 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 http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/types.h>
#include <cppunit/TestFixture.h>
#include <cppunit/extensions/HelperMacros.h>
#include <rtl/math.hxx>
#include <tools/rational.hxx>
namespace tools
{
class RationalTest : public CppUnit::TestFixture
{
public:
void testReduceInaccurate()
{
const boost::rational<long> aFract(1082130431,1073741824);
CPPUNIT_ASSERT_MESSAGE( "Fraction #1 not approximately equal to 1.007812499068677",
rtl::math::approxEqual(boost::rational_cast<double>(aFract),1.007812499068677) );
boost::rational<long> aFract2( aFract );
rational_ReduceInaccurate(aFract2, 8);
CPPUNIT_ASSERT_MESSAGE( "Fraction #2 not 1",
aFract2.numerator() == 1 &&
aFract2.denominator() == 1 );
boost::rational<long> aFract3( 0x7AAAAAAA, 0x35555555 );
CPPUNIT_ASSERT_MESSAGE( "Fraction #3 cancellation wrong",
aFract3.numerator() == 0x7AAAAAAA &&
aFract3.denominator() == 0x35555555 );
rational_ReduceInaccurate(aFract3, 30);
CPPUNIT_ASSERT_MESSAGE( "Fraction #3 ReduceInaccurate errorneously cut precision",
aFract3.numerator() == 0x7AAAAAAA &&
aFract3.denominator() == 0x35555555 );
rational_ReduceInaccurate(aFract3, 29);
CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 29 bits failed",
aFract3.numerator() == 0x3D555555 &&
aFract3.denominator() == 0x1AAAAAAA );
rational_ReduceInaccurate(aFract3, 9);
CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 9 bits failed",
aFract3.numerator() == 0x0147 &&
aFract3.denominator() == 0x008E );
rational_ReduceInaccurate(aFract3, 1);
CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 1 bit failed",
aFract3.numerator() == 2 &&
aFract3.denominator() == 1 );
rational_ReduceInaccurate(aFract3, 0);
CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 0 bits failed",
aFract3.numerator() == 2 &&
aFract3.denominator() == 1 );
#if SAL_TYPES_SIZEOFLONG == 8
boost::rational<long> aFract4(0x7AAAAAAAAAAAAAAA, 0x3555555555555555);
CPPUNIT_ASSERT_MESSAGE( "Fraction #4 cancellation wrong",
aFract4.numerator() == 0x7AAAAAAAAAAAAAAA &&
aFract4.denominator() == 0x3555555555555555 );
rational_ReduceInaccurate(aFract4, 62);
CPPUNIT_ASSERT_MESSAGE( "Fraction #4 ReduceInaccurate errorneously cut precision",
aFract4.numerator() == 0x7AAAAAAAAAAAAAAA &&
aFract4.denominator() == 0x3555555555555555 );
rational_ReduceInaccurate(aFract4, 61);
CPPUNIT_ASSERT_MESSAGE( "Fraction #4 ReduceInaccurate reduce to 61 bit failed",
aFract4.numerator() == 0x3D55555555555555 &&
aFract4.denominator() == 0x1AAAAAAAAAAAAAAA );
#endif
}
CPPUNIT_TEST_SUITE(RationalTest);
CPPUNIT_TEST(testReduceInaccurate);
CPPUNIT_TEST_SUITE_END();
};
CPPUNIT_TEST_SUITE_REGISTRATION(RationalTest);
} // namespace tools
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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