peri4
5db97ca959
remove CORS default header from PIHTTPServer fix several docs fix PIMathVector::dot return type add units directory with PIUnits facility
96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
/*! \file piunits_prefix.h
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* \ingroup Core
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* \~\brief
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* \~english Unit prefixes
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* \~russian Префиксы единиц измерения
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*/
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/*
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PIP - Platform Independent Primitives
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Unit prefix
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Ivan Pelipenko peri4ko@yandex.ru
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PIUNITS_PREFIX_H
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#define PIUNITS_PREFIX_H
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#include "pistring.h"
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namespace PIUnits {
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class PIP_EXPORT Prefix {
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friend class Value;
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public:
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enum {
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None,
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Deca = 0x100, // da 10^1 10
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Hecto, // h 10^2 100
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Kilo, // k 10^3 1000
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Mega, // M 10^6 1000000
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Giga, // G 10^9 1000000000
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Tera, // T 10^12 1000000000000
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Peta, // P 10^15 1000000000000000
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Exa, // E 10^18 1000000000000000000
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Zetta, // Z 10^21 1000000000000000000000
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Yotta, // Y 10^24 1000000000000000000000000
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Ronna, // R 10^27 1000000000000000000000000000
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Quetta, // Q 10^30 1000000000000000000000000000000
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Deci = 0x200, // d 10^−1 0.1
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Centi, // c 10^−2 0.01
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Milli, // m 10^−3 0.001
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Micro, // μ 10^−6 0.000001
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Nano, // n 10^−9 0.000000001
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Pico, // p 10^−12 0.000000000001
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Femto, // f 10^−15 0.000000000000001
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Atto, // a 10^−18 0.000000000000000001
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Zepto, // z 10^−21 0.000000000000000000001
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Yocto, // y 10^−24 0.000000000000000000000001
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Ronto, // r 10^−27 0.000000000000000000000000001
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};
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static PIString name(int prefix);
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static PIString prefix(int prefix);
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static double multiplier(int prefix);
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private:
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Prefix();
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NO_COPY_CLASS(Prefix);
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static Prefix & instance();
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static PIString valueToString(double v, void * type_class, int type, char format = 'g', int prec = 5);
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struct P {
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PIString name;
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PIString prefix;
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int pow;
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double divider;
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bool non3;
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};
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const P getPrefix(int p) const;
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const P getPrefixForValue(double v, bool use_non3, bool use_greater, bool use_smaller) const;
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PIMap<int, P> prefixes;
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PIMap<int, P *> prefixes_by_pow;
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P def_prefix;
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};
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} // namespace PIUnits
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#endif
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