tomlplusplus/include/toml++/impl/date_time.h

//# This file is a part of toml++ and is subject to the the terms of the MIT license.
//# Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
//# See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
// SPDX-License-Identifier: MIT
#pragma once

#include "forward_declarations.h"
#include "print_to_stream.h"
#include "header_start.h"

TOML_NAMESPACE_START
{
	/// \brief	A local date.
	struct TOML_TRIVIAL_ABI date
	{
		/// \brief	The year component.
		uint16_t year;

		/// \brief	The month component, from 1 - 12.
		uint8_t month;

		/// \brief	The day component, from 1 - 31.
		uint8_t day;

		/// \brief Default constructor. Does not initialize the members.
		TOML_NODISCARD_CTOR
		date() noexcept = default;

		/// \brief Constructs a date from individual date component values.
		TOML_CONSTRAINED_TEMPLATE((impl::all_integral<Y, M, D>), typename Y, typename M, typename D)
		TOML_NODISCARD_CTOR
		constexpr date(Y y, M m, D d) noexcept //
			: year{ static_cast<uint16_t>(y) },
			  month{ static_cast<uint8_t>(m) },
			  day{ static_cast<uint8_t>(d) }
		{}

		/// \brief	Equality operator.
		TOML_PURE_GETTER
		friend constexpr bool operator==(const date& lhs, const date& rhs) noexcept
		{
			return lhs.year == rhs.year	  //
				&& lhs.month == rhs.month //
				&& lhs.day == rhs.day;
		}

		/// \brief	Inequality operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator!=(const date& lhs, const date& rhs) noexcept
		{
			return !(lhs == rhs);
		}

	  private:
		/// \cond

		TOML_PURE_GETTER
		static constexpr uint32_t pack(const date& d) noexcept
		{
			return (static_cast<uint32_t>(d.year) << 16) | (static_cast<uint32_t>(d.month) << 8)
				 | static_cast<uint32_t>(d.day);
		}

		/// \endcond

	  public:
		/// \brief	Less-than operator.
		TOML_PURE_GETTER
		friend constexpr bool operator<(const date& lhs, const date& rhs) noexcept
		{
			return pack(lhs) < pack(rhs);
		}

		/// \brief	Less-than-or-equal-to operator.
		TOML_PURE_GETTER
		friend constexpr bool operator<=(const date& lhs, const date& rhs) noexcept
		{
			return pack(lhs) <= pack(rhs);
		}

		/// \brief	Greater-than operator.
		TOML_PURE_GETTER
		friend constexpr bool operator>(const date& lhs, const date& rhs) noexcept
		{
			return pack(lhs) > pack(rhs);
		}

		/// \brief	Greater-than-or-equal-to operator.
		TOML_PURE_GETTER
		friend constexpr bool operator>=(const date& lhs, const date& rhs) noexcept
		{
			return pack(lhs) >= pack(rhs);
		}

		/// \brief	Prints a date out to a stream as `YYYY-MM-DD` (per RFC 3339).
		///
		/// \detail \cpp
		/// std::cout << toml::date{ 1987, 3, 16 } << "\n";
		/// \ecpp
		///
		/// \out
		/// 1987-03-16
		/// \eout
		friend std::ostream& operator<<(std::ostream& lhs, const date& rhs)
		{
			impl::print_to_stream(lhs, rhs);
			return lhs;
		}
	};

	/// \brief	A local time-of-day.
	struct TOML_TRIVIAL_ABI time
	{
		/// \brief	The hour component, from 0 - 23.
		uint8_t hour;

		/// \brief	The minute component, from 0 - 59.
		uint8_t minute;

		/// \brief	The second component, from 0 - 59.
		uint8_t second;

		/// \brief	The fractional nanoseconds component, from 0 - 999999999.
		uint32_t nanosecond;

		/// \brief Default constructor. Does not initialize the members.
		TOML_NODISCARD_CTOR
		time() noexcept = default;

		/// \brief Constructs a time from individual time component values.
		TOML_CONSTRAINED_TEMPLATE((impl::all_integral<H, M, S, NS>),
								  typename H,
								  typename M,
								  typename S  = uint8_t,
								  typename NS = uint32_t)
		TOML_NODISCARD_CTOR
		constexpr time(H h, M m, S s = S{}, NS ns = NS{}) noexcept //
			: hour{ static_cast<uint8_t>(h) },
			  minute{ static_cast<uint8_t>(m) },
			  second{ static_cast<uint8_t>(s) },
			  nanosecond{ static_cast<uint32_t>(ns) }
		{}

		/// \brief	Equality operator.
		TOML_PURE_GETTER
		friend constexpr bool operator==(const time& lhs, const time& rhs) noexcept
		{
			return lhs.hour == rhs.hour		//
				&& lhs.minute == rhs.minute //
				&& lhs.second == rhs.second //
				&& lhs.nanosecond == rhs.nanosecond;
		}

		/// \brief	Inequality operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator!=(const time& lhs, const time& rhs) noexcept
		{
			return !(lhs == rhs);
		}

	  private:
		/// \cond

		TOML_PURE_GETTER
		static constexpr uint64_t pack(const time& t) noexcept
		{
			return static_cast<uint64_t>(t.hour) << 48 | static_cast<uint64_t>(t.minute) << 40
				 | static_cast<uint64_t>(t.second) << 32 | static_cast<uint64_t>(t.nanosecond);
		}

		/// \endcond

	  public:
		/// \brief	Less-than operator.
		TOML_PURE_GETTER
		friend constexpr bool operator<(const time& lhs, const time& rhs) noexcept
		{
			return pack(lhs) < pack(rhs);
		}

		/// \brief	Less-than-or-equal-to operator.
		TOML_PURE_GETTER
		friend constexpr bool operator<=(const time& lhs, const time& rhs) noexcept
		{
			return pack(lhs) <= pack(rhs);
		}

		/// \brief	Greater-than operator.
		TOML_PURE_GETTER
		friend constexpr bool operator>(const time& lhs, const time& rhs) noexcept
		{
			return pack(lhs) > pack(rhs);
		}

		/// \brief	Greater-than-or-equal-to operator.
		TOML_PURE_GETTER
		friend constexpr bool operator>=(const time& lhs, const time& rhs) noexcept
		{
			return pack(lhs) >= pack(rhs);
		}

		/// \brief	Prints a time out to a stream as `HH:MM:SS.FFFFFF` (per RFC 3339).
		/// \detail \cpp
		/// std::cout << toml::time{ 10, 20, 34 } << "\n";
		/// std::cout << toml::time{ 10, 20, 34, 500000000 } << "\n";
		/// \ecpp
		///
		/// \out
		/// 10:20:34
		/// 10:20:34.5
		/// \eout
		friend std::ostream& operator<<(std::ostream& lhs, const time& rhs)
		{
			impl::print_to_stream(lhs, rhs);
			return lhs;
		}
	};

	/// \brief	A timezone offset.
	struct TOML_TRIVIAL_ABI time_offset
	{
		/// \brief	Offset from UTC+0, in minutes.
		int16_t minutes;

		/// \brief	Default constructor. Does not initialize the members.
		TOML_NODISCARD_CTOR
		time_offset() noexcept = default;

		/// \brief	Constructs a timezone offset from individual hour and minute totals.
		///
		/// \detail \cpp
		/// std::cout << toml::time_offset{ 2, 30 } << "\n";
		/// std::cout << toml::time_offset{ -2, 30 } << "\n";
		/// std::cout << toml::time_offset{ -2, -30 } << "\n";
		/// std::cout << toml::time_offset{ 0, 0 } << "\n";
		/// \ecpp
		///
		/// \out
		/// +02:30
		/// -01:30
		/// -02:30
		/// Z
		/// \eout
		///
		/// \tparam H	An integral type.
		/// \tparam M	An integral type.
		///
		/// \param 	h  	The total hours.
		/// \param 	m	The total minutes.
		TOML_CONSTRAINED_TEMPLATE((impl::all_integral<H, M>), typename H, typename M)
		TOML_NODISCARD_CTOR
		constexpr time_offset(H h, M m) noexcept //
			: minutes{ static_cast<int16_t>(static_cast<impl::common_signed_type<H, M>>(h)
												* impl::common_signed_type<H, M>{ 60 }
											+ static_cast<impl::common_signed_type<H, M>>(m)) }
		{}

		/// \brief	Equality operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator==(time_offset lhs, time_offset rhs) noexcept
		{
			return lhs.minutes == rhs.minutes;
		}

		/// \brief	Inequality operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator!=(time_offset lhs, time_offset rhs) noexcept
		{
			return lhs.minutes != rhs.minutes;
		}

		/// \brief	Less-than operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator<(time_offset lhs, time_offset rhs) noexcept
		{
			return lhs.minutes < rhs.minutes;
		}

		/// \brief	Less-than-or-equal-to operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator<=(time_offset lhs, time_offset rhs) noexcept
		{
			return lhs.minutes <= rhs.minutes;
		}

		/// \brief	Greater-than operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator>(time_offset lhs, time_offset rhs) noexcept
		{
			return lhs.minutes > rhs.minutes;
		}

		/// \brief	Greater-than-or-equal-to operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator>=(time_offset lhs, time_offset rhs) noexcept
		{
			return lhs.minutes >= rhs.minutes;
		}

		/// \brief	Prints a time_offset out to a stream as `+-HH:MM or Z` (per RFC 3339).
		/// \detail \cpp
		/// std::cout << toml::time_offset{ 2, 30 } << "\n";
		/// std::cout << toml::time_offset{ 2, -30 } << "\n";
		/// std::cout << toml::time_offset{} << "\n";
		/// std::cout << toml::time_offset{ -2, 30 } << "\n";
		/// std::cout << toml::time_offset{ -2, -30 } << "\n";
		/// \ecpp
		///
		/// \out
		/// +02:30
		/// +01:30
		/// Z
		/// -01:30
		/// -02:30
		/// \eout
		friend std::ostream& operator<<(std::ostream& lhs, const time_offset& rhs)
		{
			impl::print_to_stream(lhs, rhs);
			return lhs;
		}
	};

	TOML_ABI_NAMESPACE_BOOL(TOML_HAS_CUSTOM_OPTIONAL_TYPE, custopt, stdopt);

	/// \brief	A date-time.
	struct date_time
	{
		/// \brief	The date component.
		toml::date date;

		/// \brief	The time component.
		toml::time time;

		/// \brief	The timezone offset component.
		///
		/// \remarks The date_time is said to be 'local' if the offset is empty.
		optional<toml::time_offset> offset;

		/// \brief	Default constructor. Does not initialize the members.
		TOML_NODISCARD_CTOR
		date_time() noexcept = default;

		/// \brief	Constructs a local date-time.
		///
		/// \param 	d	The date component.
		/// \param 	t	The time component.
		TOML_NODISCARD_CTOR
		constexpr date_time(const toml::date& d, const toml::time& t) noexcept //
			: date{ d },
			  time{ t },
			  offset{} // TINAE - icc bugfix
		{}

		/// \brief	Constructs a local date-time.
		///
		/// \param 	d	The date component.
		TOML_NODISCARD_CTOR
		explicit constexpr date_time(const toml::date& d) noexcept //
			: date{ d },
			  time{},
			  offset{} // TINAE - icc bugfix
		{}

		/// \brief	Constructs a local date-time.
		///
		/// \param 	t	The time component.
		TOML_NODISCARD_CTOR
		explicit constexpr date_time(const toml::time& t) noexcept //
			: date{},
			  time{ t },
			  offset{} // TINAE - icc bugfix
		{}

		/// \brief	Constructs an offset date-time.
		///
		/// \param 	d	  	The date component.
		/// \param 	t	  	The time component.
		/// \param 	off	The timezone offset.
		TOML_NODISCARD_CTOR
		constexpr date_time(const toml::date& d, const toml::time& t, const toml::time_offset& off) noexcept
			: date{ d },
			  time{ t },
			  offset{ off }
		{}

		/// \brief	Returns true if this date_time does not contain timezone offset information.
		TOML_PURE_INLINE_GETTER
		constexpr bool is_local() const noexcept
		{
			return !offset.has_value();
		}

		/// \brief	Equality operator.
		TOML_PURE_GETTER
		friend constexpr bool operator==(const date_time& lhs, const date_time& rhs) noexcept
		{
			return lhs.date == rhs.date //
				&& lhs.time == rhs.time //
				&& lhs.offset == rhs.offset;
		}

		/// \brief	Inequality operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator!=(const date_time& lhs, const date_time& rhs) noexcept
		{
			return !(lhs == rhs);
		}

		/// \brief	Less-than operator.
		TOML_PURE_GETTER
		friend constexpr bool operator<(const date_time& lhs, const date_time& rhs) noexcept
		{
			if (lhs.date != rhs.date)
				return lhs.date < rhs.date;
			if (lhs.time != rhs.time)
				return lhs.time < rhs.time;
			return lhs.offset < rhs.offset;
		}

		/// \brief	Less-than-or-equal-to operator.
		TOML_PURE_GETTER
		friend constexpr bool operator<=(const date_time& lhs, const date_time& rhs) noexcept
		{
			if (lhs.date != rhs.date)
				return lhs.date < rhs.date;
			if (lhs.time != rhs.time)
				return lhs.time < rhs.time;
			return lhs.offset <= rhs.offset;
		}

		/// \brief	Greater-than operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator>(const date_time& lhs, const date_time& rhs) noexcept
		{
			return !(lhs <= rhs);
		}

		/// \brief	Greater-than-or-equal-to operator.
		TOML_PURE_INLINE_GETTER
		friend constexpr bool operator>=(const date_time& lhs, const date_time& rhs) noexcept
		{
			return !(lhs < rhs);
		}

		/// \brief	Prints a date_time out to a stream in RFC 3339 format.
		/// \detail \cpp
		/// std::cout << toml::date_time{ { 1987, 3, 16 }, { 10, 20, 34 } } << "\n";
		/// std::cout << toml::date_time{ { 1987, 3, 16 }, { 10, 20, 34 }, { -2, -30 } } << "\n";
		/// std::cout << toml::date_time{ { 1987, 3, 16 }, { 10, 20, 34 }, {} } << "\n";
		/// \ecpp
		///
		/// \out
		/// 1987-03-16T10:20:34
		/// 1987-03-16T10:20:34-02:30
		/// 1987-03-16T10:20:34Z
		/// \eout
		friend std::ostream& operator<<(std::ostream& lhs, const date_time& rhs)
		{
			impl::print_to_stream(lhs, rhs);
			return lhs;
		}
	};

	TOML_ABI_NAMESPACE_END; // TOML_HAS_CUSTOM_OPTIONAL_TYPE
}
TOML_NAMESPACE_END;

#include "header_end.h"