lib/precision_and_rounding.h

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//
// canola - canon canola 1614p emulator
// Copyright (C) 2011 Peter Miller
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 3, as
// published by the Free Software Foundation.
//
// 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, see <http://www.gnu.org/licenses/>.
//

#ifndef LIB_PRECISION_AND_ROUNDING_H
#define LIB_PRECISION_AND_ROUNDING_H

class number; // forward

class precision_and_rounding
{
public:
    virtual ~precision_and_rounding();

    precision_and_rounding();

    enum round_t
    {
        round_up,

        round_off,

        round_down,
    };

    precision_and_rounding(int precision, round_t round);

    precision_and_rounding(const precision_and_rounding &rhs);

    precision_and_rounding &operator=(const precision_and_rounding &rhs);

    void apply(number &value);

    int get_precision(void) const { return precision; }

    round_t get_rounding(void) const { return round; }

private:
    int precision;

    round_t round;
};

#endif // LIB_PRECISION_AND_ROUNDING_H