104 lines
3.3 KiB
C
104 lines
3.3 KiB
C
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///\file
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/******************************************************************************
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The MIT License(MIT)
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Embedded Template Library.
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https://github.com/ETLCPP/etl
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https://www.etlcpp.com
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Copyright(c) 2016 John Wellbelove
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files(the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions :
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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******************************************************************************/
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#ifndef ETL_RATIO_INCLUDED
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#define ETL_RATIO_INCLUDED
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#include "platform.h"
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#include <stddef.h>
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#include <stdint.h>
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///\defgroup ratio ratio
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///\ingroup maths
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namespace etl
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{
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template <size_t NUM, size_t DEN = 1UL>
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struct ratio
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{
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static ETL_CONSTANT intmax_t num = NUM;
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static ETL_CONSTANT intmax_t den = DEN;
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};
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template <size_t NUM, size_t DEN>
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ETL_CONSTANT intmax_t ratio<NUM, DEN>::num;
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template <size_t NUM, size_t DEN>
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ETL_CONSTANT intmax_t ratio<NUM, DEN>::den;
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#if INT_MAX > INT32_MAX
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typedef ratio<1, 1000000000000000000000000> yocto;
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typedef ratio<1, 1000000000000000000000> zepto;
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typedef ratio<1, 1000000000000000000> atto;
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typedef ratio<1, 1000000000000000> femto;
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typedef ratio<1, 1000000000000> pico;
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#endif
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#if (INT_MAX >= INT32_MAX)
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typedef ratio<1, 1000000000> nano;
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typedef ratio<1, 1000000> micro;
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#endif
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#if (INT_MAX >= INT16_MAX)
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typedef ratio<1, 1000> milli;
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typedef ratio<1, 100> centi;
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typedef ratio<1, 10> deci;
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typedef ratio<10, 1> deca;
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typedef ratio<100, 1> hecto;
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typedef ratio<1000, 1> kilo;
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#endif
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#if (INT_MAX >= INT32_MAX)
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typedef ratio<1000000, 1> mega;
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typedef ratio<1000000000, 1> giga;
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#endif
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#if INT_MAX > INT32_MAX
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typedef ratio<1000000000000, 1> tera;
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typedef ratio<1000000000000000, 1> peta;
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typedef ratio<1000000000000000000, 1> exa;
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typedef ratio<1000000000000000000000, 1> zetta;
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typedef ratio<1000000000000000000000000, 1> yotta;
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#endif
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/// An approximation of PI to 6 digits.
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typedef ratio<355, 113> ratio_pi;
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/// An approximation of root 2.
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typedef ratio<239, 169> ratio_root2;
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/// An approximation of e.
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typedef ratio<326, 120> ratio_e;
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}
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#endif
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