138 lines
4.9 KiB
C++
138 lines
4.9 KiB
C++
/*------------------------------------------------------------------------------*
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* Architecture & Implementation of DBMS *
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*------------------------------------------------------------------------------*
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* Copyright 2022 Databases and Information Systems Group TU Dortmund *
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* Visit us at *
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* http://dbis.cs.tu-dortmund.de/cms/en/home/ *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR 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 *
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR *
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
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* OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Authors: *
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* Maximilian Berens <maximilian.berens@tu-dortmund.de> *
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* Roland Kühn <roland.kuehn@cs.tu-dortmund.de> *
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* Jan Mühlig <jan.muehlig@tu-dortmund.de> *
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*------------------------------------------------------------------------------*
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*/
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#pragma once
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#include <cstdint>
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#include <functional>
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#include <regex>
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#include <string>
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namespace beedb::table
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{
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/**
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* Implements date type.
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*/
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class Date
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{
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public:
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Date() noexcept = default;
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Date(const std::uint16_t year, const std::uint8_t month, const std::uint8_t day) noexcept
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: _year(year), _month(month), _day(day)
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{
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}
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Date(const Date &) = default;
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~Date() noexcept = default;
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[[nodiscard]] std::uint16_t year() const noexcept
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{
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return _year;
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}
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[[nodiscard]] std::uint8_t month() const noexcept
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{
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return _month;
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}
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[[nodiscard]] std::uint8_t day() const noexcept
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{
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return _day;
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}
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Date &operator=(const Date &other) = default;
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bool operator==(const Date other) const noexcept
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{
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return _year == other._year && _month == other._month && _day == other._day;
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}
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bool operator!=(const Date other) const noexcept
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{
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return _year != other._year || _month != other._month || _day != other._day;
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}
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bool operator<(const Date other) const noexcept
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{
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return _year < other._year || (_year == other._year && _month < other._month) ||
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(_year == other._year && _month == other._month && _day < other._day);
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}
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bool operator<=(const Date other) const noexcept
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{
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return _year < other._year || (_year == other._year && _month < other._month) ||
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(_year == other._year && _month == other._month && _day <= other._day);
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}
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bool operator>(const Date other) const noexcept
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{
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return _year > other._year || (_year == other._year && _month > other._month) ||
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(_year == other._year && _month == other._month && _day > other._day);
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}
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bool operator>=(const Date other) const noexcept
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{
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return _year > other._year || (_year == other._year && _month > other._month) ||
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(_year == other._year && _month == other._month && _day >= other._day);
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}
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bool operator==(std::nullptr_t) const noexcept
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{
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return _year == 0 && _month == 0 && _day == 0;
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}
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[[nodiscard]] std::string to_string() const
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{
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return std::to_string(static_cast<std::int16_t>(_year)) + "-" +
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std::to_string(static_cast<std::int16_t>(_month)) + "-" +
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std::to_string(static_cast<std::int16_t>(_day));
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}
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static Date from_string(const std::string &date_string)
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{
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std::smatch match;
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if (std::regex_match(date_string, match, _date_regex))
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{
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return Date{static_cast<std::uint16_t>(std::stoul(match[1].str())),
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static_cast<std::uint8_t>(std::stoul(match[2].str())),
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static_cast<std::uint8_t>(std::stoul(match[3].str()))};
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}
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return Date{};
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}
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private:
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inline static std::regex _date_regex{"(\\d{4})-(\\d{2})-(\\d{2})"};
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std::uint16_t _year = 0;
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std::uint8_t _month = 0;
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std::uint8_t _day = 0;
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};
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} // namespace beedb::table
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namespace std
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{
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template <> struct hash<beedb::table::Date>
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{
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std::size_t operator()(const beedb::table::Date &date)
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{
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const std::uint32_t h = ((((std::uint32_t{0} | date.year()) << 8) | date.month()) << 8) || date.day();
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return hash<std::uint32_t>()(h);
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}
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};
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} // namespace std
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