/****************************************************************************

** libebml : parse EBML files, see http://embl.sourceforge.net/

**

** <file/class description>

**

** Copyright (C) 2002-2010 Steve Lhomme.  All rights reserved.

**

** This file is part of libebml.

**

** This library is free software; you can redistribute it and/or

** modify it under the terms of the GNU Lesser General Public

** License as published by the Free Software Foundation; either

** version 2.1 of the License, or (at your option) any later version.

**

** This library is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

** Lesser General Public License for more details.

**

** You should have received a copy of the GNU Lesser General Public

** License along with this library; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

**

** See http://www.gnu.org/licenses/lgpl-2.1.html for LGPL licensing information.

**

** Contact license@matroska.org if any conditions of this licensing are

** not clear to you.

**

**********************************************************************/

/*!

  \file

  \version \$Id$

  \author Steve Lhomme     <robux4 @ users.sf.net>

*/

#ifndef LIBEBML_FLOAT_H

#define LIBEBML_FLOAT_H

#include "EbmlTypes.h"

#include "EbmlElement.h"

namespace libebml {

/*!

    \class EbmlFloat

    \brief Handle all operations on a float EBML element

*/

class EBML_DLL_API EbmlFloat : public EbmlElement {

  public:

    enum Precision {

       FLOAT_32

      ,FLOAT_64

    };

    EbmlFloat(Precision prec = FLOAT_32);

    EbmlFloat(double DefaultValue, Precision prec = FLOAT_32);

    EbmlFloat(const EbmlFloat & ElementToClone) = default;

    bool ValidateSize() const override

    {

      return (GetSize() == 4 || GetSize() == 8);

    }

    filepos_t RenderData(IOCallback & output, bool bForceRender, bool bWithDefault = false) override;

    filepos_t ReadData(IOCallback & input, ScopeMode ReadFully = SCOPE_ALL_DATA) override;

    filepos_t UpdateSize(bool bWithDefault = false, bool bForceRender = false) override;

    void SetPrecision(const EbmlFloat::Precision prec = FLOAT_32)

    {

      if (prec == FLOAT_64)

        SetSize_(8);

      else

        SetSize_(4); // default size

    }

//    EbmlFloat & operator=(const float NewValue) { Value = NewValue; return *this;}

    EbmlFloat & operator=(const double NewValue) { Value = NewValue; SetValueIsSet(); return *this;}

    bool IsSmallerThan(const EbmlElement *Cmp) const override;

    operator float() const;

    operator double() const;

    EbmlFloat &SetValue(double NewValue);

    double GetValue() const;

    void SetDefaultValue(double);

    double DefaultVal() const;

    bool IsDefaultValue() const override {

      return (DefaultISset() && Value == DefaultValue);

    }

#if defined(EBML_STRICT_API)

    private:

#else

    protected:

#endif

    double Value; /// The actual value of the element

    double DefaultValue;

};

} // namespace libebml

#endif // LIBEBML_FLOAT_H