///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2006, Industrial Light & Magic, a division of Lucas
// Digital Ltd. LLC
//
// All rights reserved.
//
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// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
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///////////////////////////////////////////////////////////////////////////
#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