Fixed.h

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/*
* Nirvana IDL front-end library.
*
* This is a part of the Nirvana project.
*
* Author: Igor Popov
*
* Copyright (c) 2021 Igor Popov.
*
* This program 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 3 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 Lesser General Public
* License along with this library.  If not, see <http://www.gnu.org/licenses/>.
*
* Send comments and/or bug reports to:
*  popov.nirvana@gmail.com
*/
#ifndef IDLFE_AST_FIXED_H_
#define IDLFE_AST_FIXED_H_
#pragma once
 
#include <stdint.h>
#include <string>
#include <vector>
 
#if defined (__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-private-field"
#endif
 
namespace AST {
 
class Fixed
{
public:
    uint16_t digits () const noexcept
    {
        return (uint16_t)digits_;
    }
 
    int16_t scale () const noexcept
    {
        return (int16_t)-exponent_;
    }
 
    std::string to_string () const;
 
    std::vector <uint8_t> to_BCD () const;
 
    Fixed () noexcept
    {}
 
    static Fixed normalize (const Fixed& f) noexcept;
 
private:
    int32_t digits_;
    int32_t exponent_;
    uint8_t bits_;
    uint8_t lsu_ [31];
};
 
}
 
#if defined (__clang__)
#pragma GCC diagnostic pop
#endif
 
#endif