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406 lines
15 KiB
406 lines
15 KiB
// <chrono> -*- C++ -*-
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// Copyright (C) 2008-2015 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library 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 General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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#pragma once
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#include <chrono>
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#include <limits>
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#include <ratio>
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#include <type_traits>
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using std::common_type;
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using std::enable_if;
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using std::is_convertible;
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using std::ratio;
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using std::ratio_divide;
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namespace TeensyTimerTool
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{
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template <typename _Rep, typename _Period = ratio<1>>
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struct frequency;
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template <typename _CT, typename _Period1, typename _Period2>
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struct __frequency_common_type_wrapper
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{
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private:
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typedef std::__static_gcd<_Period1::num, _Period2::num> __gcd_num;
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typedef std::__static_gcd<_Period1::den, _Period2::den> __gcd_den;
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typedef typename _CT::type __cr;
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typedef ratio<__gcd_num::value,
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(_Period1::den / __gcd_den::value) * _Period2::den>
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__r;
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public:
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typedef std::__success_type<TeensyTimerTool::frequency<__cr, __r>> type;
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};
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template <typename _Period1, typename _Period2>
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struct __frequency_common_type_wrapper<std::__failure_type, _Period1, _Period2>
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{
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typedef std::__failure_type type;
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};
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}
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namespace std
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{
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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struct common_type<TeensyTimerTool::frequency<_Rep1, _Period1>, TeensyTimerTool::frequency<_Rep2, _Period2>>
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: public TeensyTimerTool::__frequency_common_type_wrapper<typename __member_type_wrapper<std::common_type<_Rep1, _Rep2>>::type, _Period1, _Period2>::type
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{
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};
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}
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namespace TeensyTimerTool
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{
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using namespace std::chrono;
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// Primary template for frequency_cast impl.
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template <typename _ToDur, typename _CF, typename _CR,
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bool _NumIsOne = false, bool _DenIsOne = false>
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struct __frequency_cast_impl
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{
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template <typename _Rep, typename _Period>
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static constexpr _ToDur
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__cast(const frequency<_Rep, _Period>& __d)
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{
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typedef typename _ToDur::rep __to_rep;
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return _ToDur(static_cast<__to_rep>(static_cast<_CR>(__d.count()) * static_cast<_CR>(_CF::num) / static_cast<_CR>(_CF::den)));
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}
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};
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template <typename _ToDur, typename _CF, typename _CR>
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struct __frequency_cast_impl<_ToDur, _CF, _CR, true, true>
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{
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template <typename _Rep, typename _Period>
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static constexpr _ToDur
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__cast(const frequency<_Rep, _Period>& __d)
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{
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typedef typename _ToDur::rep __to_rep;
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return _ToDur(static_cast<__to_rep>(__d.count()));
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}
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};
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template <typename _ToDur, typename _CF, typename _CR>
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struct __frequency_cast_impl<_ToDur, _CF, _CR, true, false>
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{
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template <typename _Rep, typename _Period>
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static constexpr _ToDur
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__cast(const frequency<_Rep, _Period>& __d)
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{
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typedef typename _ToDur::rep __to_rep;
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return _ToDur(static_cast<__to_rep>(
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static_cast<_CR>(__d.count()) / static_cast<_CR>(_CF::den)));
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}
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};
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template <typename _ToDur, typename _CF, typename _CR>
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struct __frequency_cast_impl<_ToDur, _CF, _CR, false, true>
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{
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template <typename _Rep, typename _Period>
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static constexpr _ToDur
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__cast(const frequency<_Rep, _Period>& __d)
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{
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typedef typename _ToDur::rep __to_rep;
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return _ToDur(static_cast<__to_rep>(
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static_cast<_CR>(__d.count()) * static_cast<_CR>(_CF::num)));
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}
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};
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template <typename _Tp>
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struct __is_frequency
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: std::false_type
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{
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};
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template <typename _Rep, typename _Period>
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struct __is_frequency<frequency<_Rep, _Period>>
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: std::true_type
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{
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};
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/// duration_cast
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template <typename _ToDur, typename _Rep, typename _Period>
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constexpr typename enable_if<__is_frequency<_ToDur>::value, _ToDur>::type duration_cast(const frequency<_Rep, _Period>& __d)
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{
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typedef typename _ToDur::period __to_period;
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typedef typename _ToDur::rep __to_rep;
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typedef ratio_divide<_Period, __to_period> __cf;
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typedef typename common_type<__to_rep, _Rep, intmax_t>::type __cr;
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typedef __frequency_cast_impl<_ToDur, __cf, __cr, __cf::num == 1, __cf::den == 1> __dc;
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return __dc::__cast(__d);
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}
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/// frequency
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template <typename _Rep, typename _Period>
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struct frequency
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{
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typedef _Rep rep;
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typedef _Period period;
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static_assert(!__is_frequency<_Rep>::value, "rep cannot be a frequency");
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static_assert(std::chrono::__is_ratio<_Period>::value, "period must be a specialization of ratio");
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static_assert(_Period::num > 0, "period must be positive");
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// 20.11.5.1 construction / copy / destroy
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constexpr frequency() = default;
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// NB: Make constexpr implicit. This cannot be explicitly
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// constexpr, as any UDT that is not a literal type with a
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// constexpr copy constructor will be ill-formed.
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frequency(const frequency&) = default;
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template <typename _Rep2, typename = typename enable_if<is_convertible<_Rep2, rep>::value && (std::chrono::treat_as_floating_point<rep>::value || !std::chrono::treat_as_floating_point<_Rep2>::value)>::type>
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constexpr explicit frequency(const _Rep2& __rep)
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: __r(static_cast<rep>(__rep))
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{
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}
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template <typename _Rep2, typename _Period2, typename = typename enable_if<treat_as_floating_point<rep>::value || (ratio_divide<_Period2, period>::den == 1 && !treat_as_floating_point<_Rep2>::value)>::type>
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constexpr frequency(const frequency<_Rep2, _Period2>& __d)
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: __r(duration_cast<frequency>(__d).count()) {}
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~frequency() = default;
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frequency& operator=(const frequency&) = default;
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// 20.11.5.2 observer
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constexpr rep count() const { return __r; }
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constexpr frequency operator+() const { return *this; }
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constexpr frequency operator-() const { return frequency(-__r); }
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frequency& operator++()
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{
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++__r;
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return *this;
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}
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frequency operator++(int)
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{
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return frequency(__r++);
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}
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frequency& operator--()
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{
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--__r;
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return *this;
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}
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frequency
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operator--(int)
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{
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return frequency(__r--);
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}
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frequency&
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operator+=(const frequency& __d)
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{
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__r += __d.count();
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return *this;
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}
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frequency&
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operator-=(const frequency& __d)
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{
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__r -= __d.count();
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return *this;
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}
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frequency&
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operator*=(const rep& __rhs)
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{
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__r *= __rhs;
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return *this;
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}
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frequency&
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operator/=(const rep& __rhs)
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{
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__r /= __rhs;
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return *this;
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}
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// DR 934.
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template <typename _Rep2 = rep>
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typename enable_if<!treat_as_floating_point<_Rep2>::value,
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frequency&>::type
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operator%=(const rep& __rhs)
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{
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__r %= __rhs;
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return *this;
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}
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template <typename _Rep2 = rep>
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typename enable_if<!treat_as_floating_point<_Rep2>::value,
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frequency&>::type
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operator%=(const frequency& __d)
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{
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__r %= __d.count();
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return *this;
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}
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// 20.11.5.4 special values
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static constexpr frequency
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zero()
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{
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return frequency(duration_values<rep>::zero());
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}
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static constexpr frequency
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min()
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{
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return frequency(duration_values<rep>::min());
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}
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static constexpr frequency
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max()
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{
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return frequency(duration_values<rep>::max());
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}
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private:
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rep __r;
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};
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr typename common_type<frequency<_Rep1, _Period1>, frequency<_Rep2, _Period2>>::type operator+(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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typedef frequency<_Rep1, _Period1> __dur1;
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typedef frequency<_Rep2, _Period2> __dur2;
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typedef typename common_type<__dur1, __dur2>::type __cd;
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return __cd(__cd(__lhs).count() + __cd(__rhs).count());
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}
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr typename common_type<frequency<_Rep1, _Period1>, frequency<_Rep2, _Period2>>::type operator-(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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typedef frequency<_Rep1, _Period1> __dur1;
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typedef frequency<_Rep2, _Period2> __dur2;
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typedef typename common_type<__dur1, __dur2>::type __cd;
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return __cd(__cd(__lhs).count() - __cd(__rhs).count());
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}
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template <typename _Rep1, typename _Period, typename _Rep2>
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constexpr frequency<typename __common_rep_type<_Rep1, _Rep2>::type, _Period> operator*(const frequency<_Rep1, _Period>& __d, const _Rep2& __s)
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{
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typedef frequency<typename common_type<_Rep1, _Rep2>::type, _Period> __cd;
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return __cd(__cd(__d).count() * __s);
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}
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template <typename _Rep1, typename _Rep2, typename _Period>
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constexpr frequency<typename __common_rep_type<_Rep2, _Rep1>::type, _Period> operator*(const _Rep1& __s, const frequency<_Rep2, _Period>& __d)
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{
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return __d * __s;
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}
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template <typename _Rep1, typename _Period, typename _Rep2>
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constexpr frequency<typename __common_rep_type<_Rep1, typename enable_if<!__is_frequency<_Rep2>::value, _Rep2>::type>::type, _Period> operator/(const frequency<_Rep1, _Period>& __d, const _Rep2& __s)
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{
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typedef frequency<typename common_type<_Rep1, _Rep2>::type, _Period> __cd;
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return __cd(__cd(__d).count() / __s);
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}
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr typename common_type<_Rep1, _Rep2>::type operator/(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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typedef frequency<_Rep1, _Period1> __dur1;
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typedef frequency<_Rep2, _Period2> __dur2;
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typedef typename common_type<__dur1, __dur2>::type __cd;
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return __cd(__lhs).count() / __cd(__rhs).count();
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}
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// DR 934.
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template <typename _Rep1, typename _Period, typename _Rep2>
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constexpr frequency<typename __common_rep_type<_Rep1, typename enable_if<!__is_frequency<_Rep2>::value, _Rep2>::type>::type, _Period> operator%(const frequency<_Rep1, _Period>& __d, const _Rep2& __s)
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{
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typedef frequency<typename common_type<_Rep1, _Rep2>::type, _Period> __cd;
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return __cd(__cd(__d).count() % __s);
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}
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr typename common_type<frequency<_Rep1, _Period1>, frequency<_Rep2, _Period2>>::type operator%(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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typedef frequency<_Rep1, _Period1> __dur1;
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typedef frequency<_Rep2, _Period2> __dur2;
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typedef typename common_type<__dur1, __dur2>::type __cd;
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return __cd(__cd(__lhs).count() % __cd(__rhs).count());
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}
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// comparisons
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr bool operator==(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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typedef frequency<_Rep1, _Period1> __dur1;
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typedef frequency<_Rep2, _Period2> __dur2;
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typedef typename common_type<__dur1, __dur2>::type __ct;
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return __ct(__lhs).count() == __ct(__rhs).count();
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}
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr bool operator<(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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typedef frequency<_Rep1, _Period1> __dur1;
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typedef frequency<_Rep2, _Period2> __dur2;
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typedef typename common_type<__dur1, __dur2>::type __ct;
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return __ct(__lhs).count() < __ct(__rhs).count();
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}
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr bool operator!=(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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return !(__lhs == __rhs);
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}
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr bool operator<=(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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return !(__rhs < __lhs);
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}
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr bool operator>(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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return __rhs < __lhs;
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}
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template <typename _Rep1, typename _Period1, typename _Rep2, typename _Period2>
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constexpr bool operator>=(const frequency<_Rep1, _Period1>& __lhs, const frequency<_Rep2, _Period2>& __rhs)
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{
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return !(__lhs < __rhs);
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}
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using hertz = frequency<float>;
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using kilohertz = frequency<float, std::kilo>;
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using megahertz = frequency<float, std::mega>;
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using gigahertz = frequency<float, std::giga>;
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constexpr hertz operator""_Hz(long double hz) { return hertz{hz}; }
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constexpr hertz operator""_Hz(uint64_t hz) { return hertz{hz}; }
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constexpr kilohertz operator""_kHz(long double kHz) { return kilohertz{kHz}; }
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constexpr kilohertz operator""_kHz(uint64_t kHz) { return kilohertz{kHz}; }
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constexpr megahertz operator""_MHz(long double MHz) { return megahertz{MHz}; }
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constexpr megahertz operator""_MHz(uint64_t MHz) { return megahertz{MHz}; }
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constexpr gigahertz operator""_GHz(long double GHz) { return gigahertz{GHz}; }
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constexpr gigahertz operator""_GHz(uint64_t GHz) { return gigahertz{GHz}; }
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}
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