//

// SPDX-License-Identifier: BSD-3-Clause

// Copyright (c) Contributors to the OpenEXR Project.

//

#ifndef INCLUDED_IMF_RATIONAL_H

#define INCLUDED_IMF_RATIONAL_H

#include "ImfExport.h"

#include "ImfNamespace.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

//

//-----------------------------------------------------------------------------

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

class IMF_EXPORT_TYPE 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

    //----------------------------

    IMF_EXPORT

    explicit Rational (double x);

    //---------------------------------

    // Approximate conversion to double

    //---------------------------------

    operator double () const { return double (n) / double (d); }

};

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif