kicad/include/core/minoptmax.h

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2020 KiCad Developers, see change_log.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#ifndef MINOPTMAX_PROTO_H
#define MINOPTMAX_PROTO_H

template<class T=int>
class MINOPTMAX
{
public:
    T Min() const { assert( m_hasMin ); return m_min; };
    T Max() const { assert( m_hasMax ); return m_max; };
    T Opt() const { assert( m_hasOpt ); return m_opt; };

    bool HasMin() const { return m_hasMin; }
    bool HasMax() const { return m_hasMax; }
    bool HasOpt() const { return m_hasOpt; }

    void SetMin( T v ) { m_isNull = false; m_min = v; m_hasMin = true; }
    void SetMax( T v ) { m_isNull = false; m_max = v; m_hasMax = true; }
    void SetOpt( T v ) { m_isNull = false; m_opt = v; m_hasOpt = true; }

    bool IsNull() const { return m_isNull; }

    T OptThenMin() const 
    {
        if( m_hasOpt )
            return m_opt;
        else if( m_hasMin )
            return m_min;

        assert( m_hasMin );
        return 0;
    }

private:
    bool m_isNull;
    T m_min;
    T m_opt;
    T m_max;
    bool m_hasMin = false;
    bool m_hasOpt = false;
    bool m_hasMax = false;
};

#endif