mirror of
https://github.com/opencv/opencv.git
synced 2024-11-26 20:20:20 +08:00
94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
///////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (c) 2006, Industrial Light & Magic, a division of Lucas
|
|
// Digital Ltd. LLC
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * 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.
|
|
// * Neither the name of Industrial Light & Magic nor the names of
|
|
// its contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// 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 LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
#ifndef INCLUDED_IMF_RATIONAL_H
|
|
#define INCLUDED_IMF_RATIONAL_H
|
|
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Rational numbers
|
|
//
|
|
// A rational number is represented as pair of integers, n and d.
|
|
// The value of of the rational number is
|
|
//
|
|
// n/d for d > 0
|
|
// positive infinity for n > 0, d == 0
|
|
// negative infinity for n < 0, d == 0
|
|
// not a number (NaN) for n == 0, d == 0
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
|
|
namespace Imf {
|
|
|
|
class Rational
|
|
{
|
|
public:
|
|
|
|
int n; // numerator
|
|
unsigned int d; // denominator
|
|
|
|
|
|
//----------------------------------------
|
|
// Default constructor, sets value to zero
|
|
//----------------------------------------
|
|
|
|
Rational (): n (0), d (1) {}
|
|
|
|
|
|
//-------------------------------------
|
|
// Constructor, explicitly sets n and d
|
|
//-------------------------------------
|
|
|
|
Rational (int _n, int _d): n (_n), d (_d) {}
|
|
|
|
|
|
//----------------------------
|
|
// Constructor, approximates x
|
|
//----------------------------
|
|
|
|
explicit Rational (double x);
|
|
|
|
|
|
//---------------------------------
|
|
// Approximate conversion to double
|
|
//---------------------------------
|
|
|
|
operator double () const {return double (n) / double (d);}
|
|
};
|
|
|
|
} // namespace Imf
|
|
|
|
#endif
|