Magic_Game/core/base/time.cpp

// Copyright (c) 2016-2018 Easy2D - Nomango
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include "time.h"
#include <regex>

namespace easy2d
{
	namespace time
	{
		using namespace std::chrono;

		//-------------------------------------------------------
		// TimePoint
		//-------------------------------------------------------

		TimePoint::TimePoint()
		{
		}

		TimePoint::TimePoint(std::chrono::steady_clock::time_point time)
			: time_(time)
		{
		}

		TimePoint::TimePoint(const TimePoint & other)
			: time_(other.time_)
		{
		}

		TimePoint::TimePoint(TimePoint && other)
			: time_(std::move(other.time_))
		{
		}

		time_t TimePoint::GetTimeStamp() const
		{
			auto& duration = time_point_cast<milliseconds>(time_).time_since_epoch();
			return static_cast<time_t>(duration.count());
		}

		bool TimePoint::IsZero() const
		{
			return time_.time_since_epoch().count() == 0LL;
		}

		TimePoint TimePoint::operator+(const Duration & other) const
		{
			return TimePoint(time_ + milliseconds(other.Milliseconds()));
		}

		TimePoint TimePoint::operator-(const Duration & other) const
		{
			return TimePoint(time_ - milliseconds(other.Milliseconds()));
		}

		TimePoint & TimePoint::operator+=(const Duration & other)
		{
			time_ += milliseconds(other.Milliseconds());
			return (*this);
		}

		TimePoint & TimePoint::operator-=(const Duration &other)
		{
			time_ -= milliseconds(other.Milliseconds());
			return (*this);
		}

		Duration TimePoint::operator-(const TimePoint & other) const
		{
			auto ms = duration_cast<milliseconds>(time_ - other.time_).count();
			return Duration(static_cast<int>(ms));
		}

		TimePoint& TimePoint::operator=(const TimePoint & other) E2D_NOEXCEPT
		{
			if (this == &other)
				return *this;

			time_ = other.time_;
			return *this;
		}

		TimePoint& TimePoint::operator=(TimePoint && other) E2D_NOEXCEPT
		{
			if (this == &other)
				return *this;

			time_ = std::move(other.time_);
			return *this;
		}


		//-------------------------------------------------------
		// Duration
		//-------------------------------------------------------

		const Duration Millisecond	= Duration(1);
		const Duration Second		= 1000 * Millisecond;
		const Duration Minute		= 60 * Second;
		const Duration Hour			= 60 * Minute;

		namespace
		{
			const auto duration_regex = std::wregex(L"[-+]?([0-9]*(\\.[0-9]*)?[a-z]+)+");

			typedef std::map<std::wstring, Duration> UnitMap;
			const auto unit_map = UnitMap
			{
				{L"ms", Millisecond},
				{L"s", Second},
				{L"m", Minute},
				{L"h", Hour}
			};
		}

		Duration::Duration()
			: milliseconds_(0)
		{
		}

		Duration::Duration(int milliseconds)
			: milliseconds_(milliseconds)
		{
		}

		int Duration::Milliseconds() const
		{
			return milliseconds_;
		}

		float Duration::Seconds() const
		{
			int64_t sec = milliseconds_ / Second.milliseconds_;
			int64_t ms = milliseconds_ % Second.milliseconds_;
			return static_cast<float>(sec) + static_cast<float>(ms) / 1000.f;
		}

		float Duration::Minutes() const
		{
			int64_t min = milliseconds_ / Minute.milliseconds_;
			int64_t ms = milliseconds_ % Minute.milliseconds_;
			return static_cast<float>(min) + static_cast<float>(ms) / (60 * 1000.f);
		}

		float Duration::Hours() const
		{
			int64_t hour = milliseconds_ / Hour.milliseconds_;
			int64_t ms = milliseconds_ % Hour.milliseconds_;
			return static_cast<float>(hour) + static_cast<float>(ms) / (60 * 60 * 1000.f);
		}

		bool Duration::operator==(const Duration & other) const
		{
			return milliseconds_ == other.milliseconds_;
		}

		bool Duration::operator!=(const Duration & other) const
		{
			return milliseconds_ != other.milliseconds_;
		}

		bool Duration::operator>(const Duration & other) const
		{
			return milliseconds_ > other.milliseconds_;
		}

		bool Duration::operator>=(const Duration & other) const
		{
			return milliseconds_ >= other.milliseconds_;
		}

		bool Duration::operator<(const Duration & other) const
		{
			return milliseconds_ < other.milliseconds_;
		}

		bool Duration::operator<=(const Duration & other) const
		{
			return milliseconds_ <= other.milliseconds_;
		}

		Duration Duration::operator+(const Duration & other) const
		{
			return Duration(milliseconds_ + other.milliseconds_);
		}

		Duration Duration::operator-(const Duration & other) const
		{
			return Duration(milliseconds_ - other.milliseconds_);
		}

		Duration Duration::operator-() const
		{
			return Duration(-milliseconds_);
		}

		Duration Duration::operator*(int value) const
		{
			return Duration(milliseconds_ * value);
		}

		Duration Duration::operator/(int value) const
		{
			return Duration(milliseconds_ / value);
		}

		Duration Duration::operator*(float value) const
		{
			return Duration(static_cast<int>(milliseconds_ * value));
		}

		Duration Duration::operator/(float value) const
		{
			return Duration(static_cast<int>(milliseconds_ / value));
		}

		Duration Duration::operator*(double value) const
		{
			return Duration(static_cast<int>(milliseconds_ * value));
		}

		Duration Duration::operator/(double value) const
		{
			return Duration(static_cast<int>(milliseconds_ / value));
		}

		Duration & Duration::operator+=(const Duration &other)
		{
			milliseconds_ += other.milliseconds_;
			return (*this);
		}

		Duration & Duration::operator-=(const Duration &other)
		{
			milliseconds_ -= other.milliseconds_;
			return (*this);
		}

		Duration & Duration::operator*=(int value)
		{
			milliseconds_ *= value;
			return (*this);
		}

		Duration & Duration::operator/=(int value)
		{
			milliseconds_ /= value;
			return (*this);
		}

		Duration & Duration::operator*=(float value)
		{
			milliseconds_ = static_cast<int>(milliseconds_ * value);
			return (*this);
		}

		Duration & Duration::operator/=(float value)
		{
			milliseconds_ = static_cast<int>(milliseconds_ / value);
			return (*this);
		}

		Duration & Duration::operator*=(double value)
		{
			milliseconds_ = static_cast<int>(milliseconds_ * value);
			return (*this);
		}

		Duration & Duration::operator/=(double value)
		{
			milliseconds_ = static_cast<int>(milliseconds_ / value);
			return (*this);
		}

		Duration operator*(int value, const Duration & dur)
		{
			return dur * value;
		}

		Duration operator/(int value, const Duration & dur)
		{
			return dur / value;
		}

		Duration operator*(float value, const Duration & dur)
		{
			return dur * value;
		}

		Duration operator/(float value, const Duration & dur)
		{
			return dur / value;
		}

		Duration operator*(double value, const Duration & dur)
		{
			return dur * value;
		}

		Duration operator/(double value, const Duration & dur)
		{
			return dur / value;
		}


		//-------------------------------------------------------
		// Functions
		//-------------------------------------------------------

		TimePoint Now()
		{
			return TimePoint(steady_clock::now());
		}

		Duration ParseDuration(const std::wstring & str)
		{
			size_t len = str.length();
			size_t pos = 0;
			bool negative = false;
			Duration d;

			if (!std::regex_match(str, duration_regex))
			{
				E2D_WARNING("Time::Duration::Parse: invalid duration");
				return Duration();
			}

			if (str.empty() || str == L"0") { return d; }

			// <20><><EFBFBD><EFBFBD>λ
			if (str[0] == L'-' || str[0] == L'+')
			{
				negative = (str[0] == L'-');
				pos++;
			}

			while (pos < len)
			{
				// <20><>ֵ
				size_t i = pos;
				for (; i < len; ++i)
				{
					wchar_t ch = str[i];
					if (!(ch == L'.' || L'0' <= ch && ch <= L'9'))
					{
						break;
					}
				}

				std::wstring num_str = str.substr(pos, i - pos);
				pos = i;

				if (num_str.empty() || num_str == L".")
				{
					E2D_WARNING("Time::Duration::Parse: invalid duration");
					return Duration();
				}

				// <20><>λ
				for (; i < len; ++i)
				{
					wchar_t ch = str[i];
					if (ch == L'.' || L'0' <= ch && ch <= L'9')
					{
						break;
					}
				}

				std::wstring unit_str = str.substr(pos, i - pos);
				pos = i;

				if (unit_map.find(unit_str) == unit_map.end())
				{
					E2D_WARNING("Time::Duration::Parse: invalid duration");
					return Duration();
				}

				double num = std::stod(num_str);
				Duration unit = unit_map.at(unit_str);
				d += unit * num;
			}

			if (negative)
			{
				d = -d;
			}
			return d;
		}
	}
}