forked from amazingfate/loongoffice
582ef22d3e
Fraction used BigInt internally for computations, rational does nothing like that. Change-Id: I3e9b25074f979bc291208f7c6362c3c40eb77ff5
102 lines
4.3 KiB
C++
102 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <sal/types.h>
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#include <cppunit/TestFixture.h>
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#include <cppunit/extensions/HelperMacros.h>
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#include <rtl/math.hxx>
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#include <tools/rational.hxx>
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namespace tools
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{
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class RationalTest : public CppUnit::TestFixture
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{
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public:
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void testReduceInaccurate()
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{
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const boost::rational<sal_Int64> aFract(1082130431,1073741824);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #1 not approximately equal to 1.007812499068677",
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rtl::math::approxEqual(boost::rational_cast<double>(aFract),1.007812499068677) );
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boost::rational<sal_Int64> aFract2( aFract );
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rational_ReduceInaccurate(aFract2, 8);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #2 not 1",
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aFract2.numerator() == 1 &&
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aFract2.denominator() == 1 );
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boost::rational<sal_Int64> aFract3( 0x7AAAAAAA, 0x35555555 );
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CPPUNIT_ASSERT_MESSAGE( "Fraction #3 cancellation wrong",
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aFract3.numerator() == 0x7AAAAAAA &&
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aFract3.denominator() == 0x35555555 );
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rational_ReduceInaccurate(aFract3, 30);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #3 ReduceInaccurate errorneously cut precision",
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aFract3.numerator() == 0x7AAAAAAA &&
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aFract3.denominator() == 0x35555555 );
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rational_ReduceInaccurate(aFract3, 29);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 29 bits failed",
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aFract3.numerator() == 0x3D555555 &&
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aFract3.denominator() == 0x1AAAAAAA );
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rational_ReduceInaccurate(aFract3, 9);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 9 bits failed",
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aFract3.numerator() == 0x0147 &&
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aFract3.denominator() == 0x008E );
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rational_ReduceInaccurate(aFract3, 1);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 1 bit failed",
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aFract3.numerator() == 2 &&
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aFract3.denominator() == 1 );
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rational_ReduceInaccurate(aFract3, 0);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #3 reduce to 0 bits failed",
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aFract3.numerator() == 2 &&
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aFract3.denominator() == 1 );
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#if SAL_TYPES_SIZEOFLONG == 8
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boost::rational<sal_Int64> aFract4(0x7AAAAAAAAAAAAAAA, 0x3555555555555555);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #4 cancellation wrong",
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aFract4.numerator() == 0x7AAAAAAAAAAAAAAA &&
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aFract4.denominator() == 0x3555555555555555 );
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rational_ReduceInaccurate(aFract4, 62);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #4 ReduceInaccurate errorneously cut precision",
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aFract4.numerator() == 0x7AAAAAAAAAAAAAAA &&
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aFract4.denominator() == 0x3555555555555555 );
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rational_ReduceInaccurate(aFract4, 61);
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CPPUNIT_ASSERT_MESSAGE( "Fraction #4 ReduceInaccurate reduce to 61 bit failed",
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aFract4.numerator() == 0x3D55555555555555 &&
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aFract4.denominator() == 0x1AAAAAAAAAAAAAAA );
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#endif
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}
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CPPUNIT_TEST_SUITE(RationalTest);
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CPPUNIT_TEST(testReduceInaccurate);
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CPPUNIT_TEST_SUITE_END();
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};
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CPPUNIT_TEST_SUITE_REGISTRATION(RationalTest);
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} // namespace tools
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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