/*! \file piunits_prefix.h
 * \ingroup Core
 * \~\brief
 * \~english Unit prefixes
 * \~russian Префиксы единиц измерения
 */
/*
    PIP - Platform Independent Primitives
    Unit prefix
    Ivan Pelipenko peri4ko@yandex.ru

    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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PIUNITS_PREFIX_H
#define PIUNITS_PREFIX_H

#include "pistring.h"

namespace PIUnits {

class PIP_EXPORT Prefix {
	friend class Value;

public:
	enum {
		None,

		Deca = 0x100, // da	10^1 	10
		Hecto,        // h 	10^2 	100
		Kilo,         // k 	10^3 	1000
		Mega,         // M 	10^6 	1000000
		Giga,         // G 	10^9 	1000000000
		Tera,         // T 	10^12 	1000000000000
		Peta,         // P 	10^15 	1000000000000000
		Exa,          // E 	10^18 	1000000000000000000
		Zetta,        // Z 	10^21 	1000000000000000000000
		Yotta,        // Y 	10^24 	1000000000000000000000000
		Ronna,        // R 	10^27 	1000000000000000000000000000
		Quetta,       // Q 	10^30 	1000000000000000000000000000000

		Deci = 0x200, // d 	10^−1 	0.1
		Centi,        // c 	10^−2 	0.01
		Milli,        // m 	10^−3 	0.001
		Micro,        // μ 	10^−6 	0.000001
		Nano,         // n 	10^−9 	0.000000001
		Pico,         // p 	10^−12 	0.000000000001
		Femto,        // f 	10^−15 	0.000000000000001
		Atto,         // a 	10^−18 	0.000000000000000001
		Zepto,        // z 	10^−21 	0.000000000000000000001
		Yocto,        // y 	10^−24 	0.000000000000000000000001
		Ronto,        // r 	10^−27 	0.000000000000000000000000001
	};

	static PIString name(int prefix);
	static PIString prefix(int prefix);
	static double multiplier(int prefix);

private:
	Prefix();
	NO_COPY_CLASS(Prefix);
	static Prefix & instance();
	static PIString valueToString(double v, void * type_class, int type, char format = 'g', int prec = 5);

	struct P {
		PIString name;
		PIString prefix;
		int pow;
		double divider;
		bool non3;
	};

	const P getPrefix(int p) const;
	const P getPrefixForValue(double v, bool use_non3, bool use_greater, bool use_smaller) const;

	PIMap<int, P> prefixes;
	PIMap<int, P *> prefixes_by_pow;
	P def_prefix;
};

} // namespace PIUnits


#endif