ref: 1eceafee1c97c64a1fa936e29915daca4051bb05
src/libs/date/includes/date/tz_private.h
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#ifndef TZ_PRIVATE_H #define TZ_PRIVATE_H // The MIT License (MIT) // // Copyright (c) 2015, 2016 Howard Hinnant // // 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. // // Our apologies. When the previous paragraph was written, lowercase had not yet // been invented (that would involve another several millennia of evolution). // We did not mean to shout. #if !defined(_MSC_VER) || (_MSC_VER >= 1900) #include "tz.h" #else #include "date.h" #include <vector> #endif namespace date { namespace detail { #if !USE_OS_TZDB enum class tz {utc, local, standard}; //forward declare to avoid warnings in gcc 6.2 class MonthDayTime; std::istream& operator>>(std::istream& is, MonthDayTime& x); std::ostream& operator<<(std::ostream& os, const MonthDayTime& x); class MonthDayTime { private: struct pair { #if defined(_MSC_VER) && (_MSC_VER < 1900) pair() : month_day_(date::jan / 1), weekday_(0U) {} pair(const date::month_day& month_day, const date::weekday& weekday) : month_day_(month_day), weekday_(weekday) {} #endif date::month_day month_day_; date::weekday weekday_; }; enum Type {month_day, month_last_dow, lteq, gteq}; Type type_{month_day}; #if !defined(_MSC_VER) || (_MSC_VER >= 1900) union U #else struct U #endif { date::month_day month_day_; date::month_weekday_last month_weekday_last_; pair month_day_weekday_; #if !defined(_MSC_VER) || (_MSC_VER >= 1900) U() : month_day_{date::jan/1} {} #else U() : month_day_(date::jan/1), month_weekday_last_(date::month(0U), date::weekday_last(date::weekday(0U))) {} #endif // !defined(_MSC_VER) || (_MSC_VER >= 1900) U& operator=(const date::month_day& x); U& operator=(const date::month_weekday_last& x); U& operator=(const pair& x); } u; std::chrono::hours h_{}; std::chrono::minutes m_{}; std::chrono::seconds s_{}; tz zone_{tz::local}; public: MonthDayTime() = default; MonthDayTime(local_seconds tp, tz timezone); MonthDayTime(const date::month_day& md, tz timezone); date::day day() const; date::month month() const; tz zone() const {return zone_;} void canonicalize(date::year y); sys_seconds to_sys(date::year y, std::chrono::seconds offset, std::chrono::seconds save) const; sys_days to_sys_days(date::year y) const; sys_seconds to_time_point(date::year y) const; int compare(date::year y, const MonthDayTime& x, date::year yx, std::chrono::seconds offset, std::chrono::minutes prev_save) const; friend std::istream& operator>>(std::istream& is, MonthDayTime& x); friend std::ostream& operator<<(std::ostream& os, const MonthDayTime& x); }; // A Rule specifies one or more set of datetimes without using an offset. // Multiple dates are specified with multiple years. The years in effect // go from starting_year_ to ending_year_, inclusive. starting_year_ <= // ending_year_. save_ is in effect for times from the specified time // onward, including the specified time. When the specified time is // local, it uses the save_ from the chronologically previous Rule, or if // there is none, 0. //forward declare to avoid warnings in gcc 6.2 class Rule; bool operator==(const Rule& x, const Rule& y); bool operator<(const Rule& x, const Rule& y); bool operator==(const Rule& x, const date::year& y); bool operator<(const Rule& x, const date::year& y); bool operator==(const date::year& x, const Rule& y); bool operator<(const date::year& x, const Rule& y); bool operator==(const Rule& x, const std::string& y); bool operator<(const Rule& x, const std::string& y); bool operator==(const std::string& x, const Rule& y); bool operator<(const std::string& x, const Rule& y); std::ostream& operator<<(std::ostream& os, const Rule& r); class Rule { private: std::string name_; date::year starting_year_{0}; date::year ending_year_{0}; MonthDayTime starting_at_; std::chrono::minutes save_{0}; std::string abbrev_; public: Rule() = default; explicit Rule(const std::string& s); Rule(const Rule& r, date::year starting_year, date::year ending_year); const std::string& name() const {return name_;} const std::string& abbrev() const {return abbrev_;} const MonthDayTime& mdt() const {return starting_at_;} const date::year& starting_year() const {return starting_year_;} const date::year& ending_year() const {return ending_year_;} const std::chrono::minutes& save() const {return save_;} static void split_overlaps(std::vector<Rule>& rules); friend bool operator==(const Rule& x, const Rule& y); friend bool operator<(const Rule& x, const Rule& y); friend bool operator==(const Rule& x, const date::year& y); friend bool operator<(const Rule& x, const date::year& y); friend bool operator==(const date::year& x, const Rule& y); friend bool operator<(const date::year& x, const Rule& y); friend bool operator==(const Rule& x, const std::string& y); friend bool operator<(const Rule& x, const std::string& y); friend bool operator==(const std::string& x, const Rule& y); friend bool operator<(const std::string& x, const Rule& y); friend std::ostream& operator<<(std::ostream& os, const Rule& r); private: date::day day() const; date::month month() const; static void split_overlaps(std::vector<Rule>& rules, std::size_t i, std::size_t& e); static bool overlaps(const Rule& x, const Rule& y); static void split(std::vector<Rule>& rules, std::size_t i, std::size_t k, std::size_t& e); }; inline bool operator!=(const Rule& x, const Rule& y) {return !(x == y);} inline bool operator> (const Rule& x, const Rule& y) {return y < x;} inline bool operator<=(const Rule& x, const Rule& y) {return !(y < x);} inline bool operator>=(const Rule& x, const Rule& y) {return !(x < y);} inline bool operator!=(const Rule& x, const date::year& y) {return !(x == y);} inline bool operator> (const Rule& x, const date::year& y) {return y < x;} inline bool operator<=(const Rule& x, const date::year& y) {return !(y < x);} inline bool operator>=(const Rule& x, const date::year& y) {return !(x < y);} inline bool operator!=(const date::year& x, const Rule& y) {return !(x == y);} inline bool operator> (const date::year& x, const Rule& y) {return y < x;} inline bool operator<=(const date::year& x, const Rule& y) {return !(y < x);} inline bool operator>=(const date::year& x, const Rule& y) {return !(x < y);} inline bool operator!=(const Rule& x, const std::string& y) {return !(x == y);} inline bool operator> (const Rule& x, const std::string& y) {return y < x;} inline bool operator<=(const Rule& x, const std::string& y) {return !(y < x);} inline bool operator>=(const Rule& x, const std::string& y) {return !(x < y);} inline bool operator!=(const std::string& x, const Rule& y) {return !(x == y);} inline bool operator> (const std::string& x, const Rule& y) {return y < x;} inline bool operator<=(const std::string& x, const Rule& y) {return !(y < x);} inline bool operator>=(const std::string& x, const Rule& y) {return !(x < y);} struct zonelet { enum tag {has_rule, has_save, is_empty}; std::chrono::seconds gmtoff_; tag tag_ = has_rule; #if !defined(_MSC_VER) || (_MSC_VER >= 1900) union U #else struct U #endif { std::string rule_; std::chrono::minutes save_; ~U() {} U() {} U(const U&) {} U& operator=(const U&) = delete; } u; std::string format_; date::year until_year_{0}; MonthDayTime until_date_; sys_seconds until_utc_; local_seconds until_std_; local_seconds until_loc_; std::chrono::minutes initial_save_{}; std::string initial_abbrev_; std::pair<const Rule*, date::year> first_rule_{nullptr, date::year::min()}; std::pair<const Rule*, date::year> last_rule_{nullptr, date::year::max()}; ~zonelet(); zonelet(); zonelet(const zonelet& i); zonelet& operator=(const zonelet&) = delete; }; #else // USE_OS_TZDB struct ttinfo { std::int32_t tt_gmtoff; unsigned char tt_isdst; unsigned char tt_abbrind; unsigned char pad[2]; }; static_assert(sizeof(ttinfo) == 8, ""); struct expanded_ttinfo { std::chrono::seconds offset; std::string abbrev; bool is_dst; }; struct transition { sys_seconds timepoint; const expanded_ttinfo* info; transition(sys_seconds tp, const expanded_ttinfo* i = nullptr) : timepoint(tp) , info(i) {} friend std::ostream& operator<<(std::ostream& os, const transition& t) { using date::operator<<; os << t.timepoint << "Z "; if (t.info->offset >= std::chrono::seconds{0}) os << '+'; os << make_time(t.info->offset); if (t.info->is_dst > 0) os << " daylight "; else os << " standard "; os << t.info->abbrev; return os; } }; #endif // USE_OS_TZDB } // namespace detail } // namespace date #if defined(_MSC_VER) && (_MSC_VER < 1900) #include "tz.h" #endif #endif // TZ_PRIVATE_H |