Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : #ifndef INCLUDED_TOOLS_FRACT_HXX
      20             : #define INCLUDED_TOOLS_FRACT_HXX
      21             : 
      22             : #include <tools/toolsdllapi.h>
      23             : 
      24             : class SvStream;
      25             : 
      26             : class TOOLS_DLLPUBLIC SAL_WARN_UNUSED Fraction
      27             : {
      28             : private:
      29             :     long            nNumerator;
      30             :     long            nDenominator;
      31             : 
      32             : public:
      33           0 :                     Fraction() { nNumerator = 0; nDenominator = 1; }
      34             :                     Fraction( const Fraction & rFrac );
      35             :                     Fraction( long nNum, long nDen=1 );
      36             :                     Fraction( double dVal );
      37             : 
      38             :     bool            IsValid() const;
      39             : 
      40           0 :     long            GetNumerator() const { return nNumerator; }
      41           0 :     long            GetDenominator() const { return nDenominator; }
      42             : 
      43             :     operator        long() const;
      44             :     operator        double() const;
      45             : 
      46             :     Fraction&       operator=( const Fraction& rfrFrac );
      47             : 
      48             :     Fraction&       operator+=( const Fraction& rfrFrac );
      49             :     Fraction&       operator-=( const Fraction& rfrFrac );
      50             :     Fraction&       operator*=( const Fraction& rfrFrac );
      51             :     Fraction&       operator/=( const Fraction& rfrFrac );
      52             : 
      53             :     void            ReduceInaccurate( unsigned nSignificantBits );
      54             : 
      55             :     friend inline   Fraction operator+( const Fraction& rVal1, const Fraction& rVal2 );
      56             :     friend inline   Fraction operator-( const Fraction& rVal1, const Fraction& rVal2 );
      57             :     friend inline   Fraction operator*( const Fraction& rVal1, const Fraction& rVal2 );
      58             :     friend inline   Fraction operator/( const Fraction& rVal1, const Fraction& rVal2 );
      59             : 
      60             :     TOOLS_DLLPUBLIC friend          bool operator==( const Fraction& rVal1, const Fraction& rVal2 );
      61             :     friend inline   bool operator!=( const Fraction& rVal1, const Fraction& rVal2 );
      62             :     TOOLS_DLLPUBLIC friend          bool operator< ( const Fraction& rVal1, const Fraction& rVal2 );
      63             :     TOOLS_DLLPUBLIC friend          bool operator> ( const Fraction& rVal1, const Fraction& rVal2 );
      64             :     friend inline   bool operator<=( const Fraction& rVal1, const Fraction& rVal2 );
      65             :     friend inline   bool operator>=( const Fraction& rVal1, const Fraction& rVal2 );
      66             : 
      67             :     TOOLS_DLLPUBLIC friend SvStream& ReadFraction( SvStream& rIStream, Fraction& rFract );
      68             :     TOOLS_DLLPUBLIC friend SvStream& WriteFraction( SvStream& rOStream, const Fraction& rFract );
      69             : };
      70             : 
      71           0 : inline Fraction::Fraction( const Fraction& rFrac )
      72             : {
      73           0 :     nNumerator   = rFrac.nNumerator;
      74           0 :     nDenominator = rFrac.nDenominator;
      75           0 : }
      76             : 
      77           0 : inline Fraction& Fraction::operator=( const Fraction& rFrac )
      78             : {
      79           0 :     nNumerator   = rFrac.nNumerator;
      80           0 :     nDenominator = rFrac.nDenominator;
      81           0 :     return *this;
      82             : }
      83             : 
      84           0 : inline bool Fraction::IsValid() const
      85             : {
      86           0 :     return (nDenominator > 0);
      87             : }
      88             : 
      89           0 : inline Fraction::operator long() const
      90             : {
      91           0 :     if ( nDenominator > 0 )
      92           0 :         return (nNumerator / nDenominator);
      93             :     else
      94           0 :         return 0;
      95             : }
      96             : 
      97           0 : inline Fraction operator+( const Fraction& rVal1, const Fraction& rVal2 )
      98             : {
      99           0 :     Fraction aErg( rVal1 );
     100           0 :     aErg += rVal2;
     101           0 :     return aErg;
     102             : }
     103             : 
     104             : inline Fraction operator-( const Fraction& rVal1, const Fraction& rVal2 )
     105             : {
     106             :     Fraction aErg( rVal1 );
     107             :     aErg -= rVal2;
     108             :     return aErg;
     109             : }
     110             : 
     111           0 : inline Fraction operator*( const Fraction& rVal1, const Fraction& rVal2 )
     112             : {
     113           0 :     Fraction aErg( rVal1 );
     114           0 :     aErg *= rVal2;
     115           0 :     return aErg;
     116             : }
     117             : 
     118           0 : inline Fraction operator/( const Fraction& rVal1, const Fraction& rVal2 )
     119             : {
     120           0 :     Fraction aErg( rVal1 );
     121           0 :     aErg /= rVal2;
     122           0 :     return aErg;
     123             : }
     124             : 
     125           0 : inline bool operator !=( const Fraction& rVal1, const Fraction& rVal2 )
     126             : {
     127           0 :     return !(rVal1 == rVal2);
     128             : }
     129             : 
     130           0 : inline bool operator <=( const Fraction& rVal1, const Fraction& rVal2 )
     131             : {
     132           0 :     return !(rVal1 > rVal2);
     133             : }
     134             : 
     135             : inline bool operator >=( const Fraction& rVal1, const Fraction& rVal2 )
     136             : {
     137             :     return !(rVal1 < rVal2);
     138             : }
     139             : 
     140             : #endif
     141             : 
     142             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */