diff options
Diffstat (limited to 'third_party/abseil-cpp/absl/time/internal/cctz/src')
21 files changed, 8739 insertions, 0 deletions
diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/cctz_benchmark.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/cctz_benchmark.cc new file mode 100644 index 0000000000..d30a644e09 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/cctz_benchmark.cc @@ -0,0 +1,1029 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include <algorithm> +#include <cassert> +#include <chrono> +#include <ctime> +#include <random> +#include <string> +#include <vector> + +#include "benchmark/benchmark.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" +#include "time_zone_impl.h" + +namespace { + +namespace cctz = absl::time_internal::cctz; + +void BM_Difference_Days(benchmark::State& state) { + const cctz::civil_day c(2014, 8, 22); + const cctz::civil_day epoch(1970, 1, 1); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(c - epoch); + } +} +BENCHMARK(BM_Difference_Days); + +void BM_Step_Days(benchmark::State& state) { + const cctz::civil_day kStart(2014, 8, 22); + cctz::civil_day c = kStart; + while (state.KeepRunning()) { + benchmark::DoNotOptimize(++c); + } +} +BENCHMARK(BM_Step_Days); + +void BM_GetWeekday(benchmark::State& state) { + const cctz::civil_day c(2014, 8, 22); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::get_weekday(c)); + } +} +BENCHMARK(BM_GetWeekday); + +void BM_NextWeekday(benchmark::State& state) { + const cctz::civil_day kStart(2014, 8, 22); + const cctz::civil_day kDays[7] = { + kStart + 0, kStart + 1, kStart + 2, kStart + 3, + kStart + 4, kStart + 5, kStart + 6, + }; + const cctz::weekday kWeekdays[7] = { + cctz::weekday::monday, cctz::weekday::tuesday, cctz::weekday::wednesday, + cctz::weekday::thursday, cctz::weekday::friday, cctz::weekday::saturday, + cctz::weekday::sunday, + }; + while (state.KeepRunningBatch(7 * 7)) { + for (const auto from : kDays) { + for (const auto to : kWeekdays) { + benchmark::DoNotOptimize(cctz::next_weekday(from, to)); + } + } + } +} +BENCHMARK(BM_NextWeekday); + +void BM_PrevWeekday(benchmark::State& state) { + const cctz::civil_day kStart(2014, 8, 22); + const cctz::civil_day kDays[7] = { + kStart + 0, kStart + 1, kStart + 2, kStart + 3, + kStart + 4, kStart + 5, kStart + 6, + }; + const cctz::weekday kWeekdays[7] = { + cctz::weekday::monday, cctz::weekday::tuesday, cctz::weekday::wednesday, + cctz::weekday::thursday, cctz::weekday::friday, cctz::weekday::saturday, + cctz::weekday::sunday, + }; + while (state.KeepRunningBatch(7 * 7)) { + for (const auto from : kDays) { + for (const auto to : kWeekdays) { + benchmark::DoNotOptimize(cctz::prev_weekday(from, to)); + } + } + } +} +BENCHMARK(BM_PrevWeekday); + +const char RFC3339_full[] = "%Y-%m-%dT%H:%M:%E*S%Ez"; +const char RFC3339_sec[] = "%Y-%m-%dT%H:%M:%S%Ez"; + +const char RFC1123_full[] = "%a, %d %b %Y %H:%M:%S %z"; +const char RFC1123_no_wday[] = "%d %b %Y %H:%M:%S %z"; + +// A list of known time-zone names. +// TODO: Refactor with src/time_zone_lookup_test.cc. +const char* const kTimeZoneNames[] = {"Africa/Abidjan", + "Africa/Accra", + "Africa/Addis_Ababa", + "Africa/Algiers", + "Africa/Asmara", + "Africa/Asmera", + "Africa/Bamako", + "Africa/Bangui", + "Africa/Banjul", + "Africa/Bissau", + "Africa/Blantyre", + "Africa/Brazzaville", + "Africa/Bujumbura", + "Africa/Cairo", + "Africa/Casablanca", + "Africa/Ceuta", + "Africa/Conakry", + "Africa/Dakar", + "Africa/Dar_es_Salaam", + "Africa/Djibouti", + "Africa/Douala", + "Africa/El_Aaiun", + "Africa/Freetown", + "Africa/Gaborone", + "Africa/Harare", + "Africa/Johannesburg", + "Africa/Juba", + "Africa/Kampala", + "Africa/Khartoum", + "Africa/Kigali", + "Africa/Kinshasa", + "Africa/Lagos", + "Africa/Libreville", + "Africa/Lome", + "Africa/Luanda", + "Africa/Lubumbashi", + "Africa/Lusaka", + "Africa/Malabo", + "Africa/Maputo", + "Africa/Maseru", + "Africa/Mbabane", + "Africa/Mogadishu", + "Africa/Monrovia", + "Africa/Nairobi", + "Africa/Ndjamena", + "Africa/Niamey", + "Africa/Nouakchott", + "Africa/Ouagadougou", + "Africa/Porto-Novo", + "Africa/Sao_Tome", + "Africa/Timbuktu", + "Africa/Tripoli", + "Africa/Tunis", + "Africa/Windhoek", + "America/Adak", + "America/Anchorage", + "America/Anguilla", + "America/Antigua", + "America/Araguaina", + "America/Argentina/Buenos_Aires", + "America/Argentina/Catamarca", + "America/Argentina/ComodRivadavia", + "America/Argentina/Cordoba", + "America/Argentina/Jujuy", + "America/Argentina/La_Rioja", + "America/Argentina/Mendoza", + "America/Argentina/Rio_Gallegos", + "America/Argentina/Salta", + "America/Argentina/San_Juan", + "America/Argentina/San_Luis", + "America/Argentina/Tucuman", + "America/Argentina/Ushuaia", + "America/Aruba", + "America/Asuncion", + "America/Atikokan", + "America/Atka", + "America/Bahia", + "America/Bahia_Banderas", + "America/Barbados", + "America/Belem", + "America/Belize", + "America/Blanc-Sablon", + "America/Boa_Vista", + "America/Bogota", + "America/Boise", + "America/Buenos_Aires", + "America/Cambridge_Bay", + "America/Campo_Grande", + "America/Cancun", + "America/Caracas", + "America/Catamarca", + "America/Cayenne", + "America/Cayman", + "America/Chicago", + "America/Chihuahua", + "America/Coral_Harbour", + "America/Cordoba", + "America/Costa_Rica", + "America/Creston", + "America/Cuiaba", + "America/Curacao", + "America/Danmarkshavn", + "America/Dawson", + "America/Dawson_Creek", + "America/Denver", + "America/Detroit", + "America/Dominica", + "America/Edmonton", + "America/Eirunepe", + "America/El_Salvador", + "America/Ensenada", + "America/Fort_Nelson", + "America/Fort_Wayne", + "America/Fortaleza", + "America/Glace_Bay", + "America/Godthab", + "America/Goose_Bay", + "America/Grand_Turk", + "America/Grenada", + "America/Guadeloupe", + "America/Guatemala", + "America/Guayaquil", + "America/Guyana", + "America/Halifax", + "America/Havana", + "America/Hermosillo", + "America/Indiana/Indianapolis", + "America/Indiana/Knox", + "America/Indiana/Marengo", + "America/Indiana/Petersburg", + "America/Indiana/Tell_City", + "America/Indiana/Vevay", + "America/Indiana/Vincennes", + "America/Indiana/Winamac", + "America/Indianapolis", + "America/Inuvik", + "America/Iqaluit", + "America/Jamaica", + "America/Jujuy", + "America/Juneau", + "America/Kentucky/Louisville", + "America/Kentucky/Monticello", + "America/Knox_IN", + "America/Kralendijk", + "America/La_Paz", + "America/Lima", + "America/Los_Angeles", + "America/Louisville", + "America/Lower_Princes", + "America/Maceio", + "America/Managua", + "America/Manaus", + "America/Marigot", + "America/Martinique", + "America/Matamoros", + "America/Mazatlan", + "America/Mendoza", + "America/Menominee", + "America/Merida", + "America/Metlakatla", + "America/Mexico_City", + "America/Miquelon", + "America/Moncton", + "America/Monterrey", + "America/Montevideo", + "America/Montreal", + "America/Montserrat", + "America/Nassau", + "America/New_York", + "America/Nipigon", + "America/Nome", + "America/Noronha", + "America/North_Dakota/Beulah", + "America/North_Dakota/Center", + "America/North_Dakota/New_Salem", + "America/Ojinaga", + "America/Panama", + "America/Pangnirtung", + "America/Paramaribo", + "America/Phoenix", + "America/Port-au-Prince", + "America/Port_of_Spain", + "America/Porto_Acre", + "America/Porto_Velho", + "America/Puerto_Rico", + "America/Punta_Arenas", + "America/Rainy_River", + "America/Rankin_Inlet", + "America/Recife", + "America/Regina", + "America/Resolute", + "America/Rio_Branco", + "America/Rosario", + "America/Santa_Isabel", + "America/Santarem", + "America/Santiago", + "America/Santo_Domingo", + "America/Sao_Paulo", + "America/Scoresbysund", + "America/Shiprock", + "America/Sitka", + "America/St_Barthelemy", + "America/St_Johns", + "America/St_Kitts", + "America/St_Lucia", + "America/St_Thomas", + "America/St_Vincent", + "America/Swift_Current", + "America/Tegucigalpa", + "America/Thule", + "America/Thunder_Bay", + "America/Tijuana", + "America/Toronto", + "America/Tortola", + "America/Vancouver", + "America/Virgin", + "America/Whitehorse", + "America/Winnipeg", + "America/Yakutat", + "America/Yellowknife", + "Antarctica/Casey", + "Antarctica/Davis", + "Antarctica/DumontDUrville", + "Antarctica/Macquarie", + "Antarctica/Mawson", + "Antarctica/McMurdo", + "Antarctica/Palmer", + "Antarctica/Rothera", + "Antarctica/South_Pole", + "Antarctica/Syowa", + "Antarctica/Troll", + "Antarctica/Vostok", + "Arctic/Longyearbyen", + "Asia/Aden", + "Asia/Almaty", + "Asia/Amman", + "Asia/Anadyr", + "Asia/Aqtau", + "Asia/Aqtobe", + "Asia/Ashgabat", + "Asia/Ashkhabad", + "Asia/Atyrau", + "Asia/Baghdad", + "Asia/Bahrain", + "Asia/Baku", + "Asia/Bangkok", + "Asia/Barnaul", + "Asia/Beirut", + "Asia/Bishkek", + "Asia/Brunei", + "Asia/Calcutta", + "Asia/Chita", + "Asia/Choibalsan", + "Asia/Chongqing", + "Asia/Chungking", + "Asia/Colombo", + "Asia/Dacca", + "Asia/Damascus", + "Asia/Dhaka", + "Asia/Dili", + "Asia/Dubai", + "Asia/Dushanbe", + "Asia/Famagusta", + "Asia/Gaza", + "Asia/Harbin", + "Asia/Hebron", + "Asia/Ho_Chi_Minh", + "Asia/Hong_Kong", + "Asia/Hovd", + "Asia/Irkutsk", + "Asia/Istanbul", + "Asia/Jakarta", + "Asia/Jayapura", + "Asia/Jerusalem", + "Asia/Kabul", + "Asia/Kamchatka", + "Asia/Karachi", + "Asia/Kashgar", + "Asia/Kathmandu", + "Asia/Katmandu", + "Asia/Khandyga", + "Asia/Kolkata", + "Asia/Krasnoyarsk", + "Asia/Kuala_Lumpur", + "Asia/Kuching", + "Asia/Kuwait", + "Asia/Macao", + "Asia/Macau", + "Asia/Magadan", + "Asia/Makassar", + "Asia/Manila", + "Asia/Muscat", + "Asia/Nicosia", + "Asia/Novokuznetsk", + "Asia/Novosibirsk", + "Asia/Omsk", + "Asia/Oral", + "Asia/Phnom_Penh", + "Asia/Pontianak", + "Asia/Pyongyang", + "Asia/Qatar", + "Asia/Qostanay", + "Asia/Qyzylorda", + "Asia/Rangoon", + "Asia/Riyadh", + "Asia/Saigon", + "Asia/Sakhalin", + "Asia/Samarkand", + "Asia/Seoul", + "Asia/Shanghai", + "Asia/Singapore", + "Asia/Srednekolymsk", + "Asia/Taipei", + "Asia/Tashkent", + "Asia/Tbilisi", + "Asia/Tehran", + "Asia/Tel_Aviv", + "Asia/Thimbu", + "Asia/Thimphu", + "Asia/Tokyo", + "Asia/Tomsk", + "Asia/Ujung_Pandang", + "Asia/Ulaanbaatar", + "Asia/Ulan_Bator", + "Asia/Urumqi", + "Asia/Ust-Nera", + "Asia/Vientiane", + "Asia/Vladivostok", + "Asia/Yakutsk", + "Asia/Yangon", + "Asia/Yekaterinburg", + "Asia/Yerevan", + "Atlantic/Azores", + "Atlantic/Bermuda", + "Atlantic/Canary", + "Atlantic/Cape_Verde", + "Atlantic/Faeroe", + "Atlantic/Faroe", + "Atlantic/Jan_Mayen", + "Atlantic/Madeira", + "Atlantic/Reykjavik", + "Atlantic/South_Georgia", + "Atlantic/St_Helena", + "Atlantic/Stanley", + "Australia/ACT", + "Australia/Adelaide", + "Australia/Brisbane", + "Australia/Broken_Hill", + "Australia/Canberra", + "Australia/Currie", + "Australia/Darwin", + "Australia/Eucla", + "Australia/Hobart", + "Australia/LHI", + "Australia/Lindeman", + "Australia/Lord_Howe", + "Australia/Melbourne", + "Australia/NSW", + "Australia/North", + "Australia/Perth", + "Australia/Queensland", + "Australia/South", + "Australia/Sydney", + "Australia/Tasmania", + "Australia/Victoria", + "Australia/West", + "Australia/Yancowinna", + "Brazil/Acre", + "Brazil/DeNoronha", + "Brazil/East", + "Brazil/West", + "CET", + "CST6CDT", + "Canada/Atlantic", + "Canada/Central", + "Canada/Eastern", + "Canada/Mountain", + "Canada/Newfoundland", + "Canada/Pacific", + "Canada/Saskatchewan", + "Canada/Yukon", + "Chile/Continental", + "Chile/EasterIsland", + "Cuba", + "EET", + "EST", + "EST5EDT", + "Egypt", + "Eire", + "Etc/GMT", + "Etc/GMT+0", + "Etc/GMT+1", + "Etc/GMT+10", + "Etc/GMT+11", + "Etc/GMT+12", + "Etc/GMT+2", + "Etc/GMT+3", + "Etc/GMT+4", + "Etc/GMT+5", + "Etc/GMT+6", + "Etc/GMT+7", + "Etc/GMT+8", + "Etc/GMT+9", + "Etc/GMT-0", + "Etc/GMT-1", + "Etc/GMT-10", + "Etc/GMT-11", + "Etc/GMT-12", + "Etc/GMT-13", + "Etc/GMT-14", + "Etc/GMT-2", + "Etc/GMT-3", + "Etc/GMT-4", + "Etc/GMT-5", + "Etc/GMT-6", + "Etc/GMT-7", + "Etc/GMT-8", + "Etc/GMT-9", + "Etc/GMT0", + "Etc/Greenwich", + "Etc/UCT", + "Etc/UTC", + "Etc/Universal", + "Etc/Zulu", + "Europe/Amsterdam", + "Europe/Andorra", + "Europe/Astrakhan", + "Europe/Athens", + "Europe/Belfast", + "Europe/Belgrade", + "Europe/Berlin", + "Europe/Bratislava", + "Europe/Brussels", + "Europe/Bucharest", + "Europe/Budapest", + "Europe/Busingen", + "Europe/Chisinau", + "Europe/Copenhagen", + "Europe/Dublin", + "Europe/Gibraltar", + "Europe/Guernsey", + "Europe/Helsinki", + "Europe/Isle_of_Man", + "Europe/Istanbul", + "Europe/Jersey", + "Europe/Kaliningrad", + "Europe/Kiev", + "Europe/Kirov", + "Europe/Lisbon", + "Europe/Ljubljana", + "Europe/London", + "Europe/Luxembourg", + "Europe/Madrid", + "Europe/Malta", + "Europe/Mariehamn", + "Europe/Minsk", + "Europe/Monaco", + "Europe/Moscow", + "Europe/Nicosia", + "Europe/Oslo", + "Europe/Paris", + "Europe/Podgorica", + "Europe/Prague", + "Europe/Riga", + "Europe/Rome", + "Europe/Samara", + "Europe/San_Marino", + "Europe/Sarajevo", + "Europe/Saratov", + "Europe/Simferopol", + "Europe/Skopje", + "Europe/Sofia", + "Europe/Stockholm", + "Europe/Tallinn", + "Europe/Tirane", + "Europe/Tiraspol", + "Europe/Ulyanovsk", + "Europe/Uzhgorod", + "Europe/Vaduz", + "Europe/Vatican", + "Europe/Vienna", + "Europe/Vilnius", + "Europe/Volgograd", + "Europe/Warsaw", + "Europe/Zagreb", + "Europe/Zaporozhye", + "Europe/Zurich", + "GB", + "GB-Eire", + "GMT", + "GMT+0", + "GMT-0", + "GMT0", + "Greenwich", + "HST", + "Hongkong", + "Iceland", + "Indian/Antananarivo", + "Indian/Chagos", + "Indian/Christmas", + "Indian/Cocos", + "Indian/Comoro", + "Indian/Kerguelen", + "Indian/Mahe", + "Indian/Maldives", + "Indian/Mauritius", + "Indian/Mayotte", + "Indian/Reunion", + "Iran", + "Israel", + "Jamaica", + "Japan", + "Kwajalein", + "Libya", + "MET", + "MST", + "MST7MDT", + "Mexico/BajaNorte", + "Mexico/BajaSur", + "Mexico/General", + "NZ", + "NZ-CHAT", + "Navajo", + "PRC", + "PST8PDT", + "Pacific/Apia", + "Pacific/Auckland", + "Pacific/Bougainville", + "Pacific/Chatham", + "Pacific/Chuuk", + "Pacific/Easter", + "Pacific/Efate", + "Pacific/Enderbury", + "Pacific/Fakaofo", + "Pacific/Fiji", + "Pacific/Funafuti", + "Pacific/Galapagos", + "Pacific/Gambier", + "Pacific/Guadalcanal", + "Pacific/Guam", + "Pacific/Honolulu", + "Pacific/Johnston", + "Pacific/Kiritimati", + "Pacific/Kosrae", + "Pacific/Kwajalein", + "Pacific/Majuro", + "Pacific/Marquesas", + "Pacific/Midway", + "Pacific/Nauru", + "Pacific/Niue", + "Pacific/Norfolk", + "Pacific/Noumea", + "Pacific/Pago_Pago", + "Pacific/Palau", + "Pacific/Pitcairn", + "Pacific/Pohnpei", + "Pacific/Ponape", + "Pacific/Port_Moresby", + "Pacific/Rarotonga", + "Pacific/Saipan", + "Pacific/Samoa", + "Pacific/Tahiti", + "Pacific/Tarawa", + "Pacific/Tongatapu", + "Pacific/Truk", + "Pacific/Wake", + "Pacific/Wallis", + "Pacific/Yap", + "Poland", + "Portugal", + "ROC", + "ROK", + "Singapore", + "Turkey", + "UCT", + "US/Alaska", + "US/Aleutian", + "US/Arizona", + "US/Central", + "US/East-Indiana", + "US/Eastern", + "US/Hawaii", + "US/Indiana-Starke", + "US/Michigan", + "US/Mountain", + "US/Pacific", + "US/Samoa", + "UTC", + "Universal", + "W-SU", + "WET", + "Zulu", + nullptr}; + +std::vector<std::string> AllTimeZoneNames() { + std::vector<std::string> names; + for (const char* const* namep = kTimeZoneNames; *namep != nullptr; ++namep) { + names.push_back(std::string("file:") + *namep); + } + assert(!names.empty()); + + std::mt19937 urbg(42); // a UniformRandomBitGenerator with fixed seed + std::shuffle(names.begin(), names.end(), urbg); + return names; +} + +cctz::time_zone TestTimeZone() { + cctz::time_zone tz; + cctz::load_time_zone("America/Los_Angeles", &tz); + return tz; +} + +void BM_Zone_LoadUTCTimeZoneFirst(benchmark::State& state) { + cctz::time_zone tz; + cctz::load_time_zone("UTC", &tz); // in case we're first + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::load_time_zone("UTC", &tz)); + } +} +BENCHMARK(BM_Zone_LoadUTCTimeZoneFirst); + +void BM_Zone_LoadUTCTimeZoneLast(benchmark::State& state) { + cctz::time_zone tz; + for (const auto& name : AllTimeZoneNames()) { + cctz::load_time_zone(name, &tz); // prime cache + } + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::load_time_zone("UTC", &tz)); + } +} +BENCHMARK(BM_Zone_LoadUTCTimeZoneLast); + +void BM_Zone_LoadTimeZoneFirst(benchmark::State& state) { + cctz::time_zone tz = cctz::utc_time_zone(); // in case we're first + const std::string name = "file:America/Los_Angeles"; + while (state.KeepRunning()) { + state.PauseTiming(); + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + state.ResumeTiming(); + benchmark::DoNotOptimize(cctz::load_time_zone(name, &tz)); + } +} +BENCHMARK(BM_Zone_LoadTimeZoneFirst); + +void BM_Zone_LoadTimeZoneCached(benchmark::State& state) { + cctz::time_zone tz = cctz::utc_time_zone(); // in case we're first + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + const std::string name = "file:America/Los_Angeles"; + cctz::load_time_zone(name, &tz); // prime cache + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::load_time_zone(name, &tz)); + } +} +BENCHMARK(BM_Zone_LoadTimeZoneCached); + +void BM_Zone_LoadLocalTimeZoneCached(benchmark::State& state) { + cctz::utc_time_zone(); // in case we're first + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + cctz::local_time_zone(); // prime cache + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::local_time_zone()); + } +} +BENCHMARK(BM_Zone_LoadLocalTimeZoneCached); + +void BM_Zone_LoadAllTimeZonesFirst(benchmark::State& state) { + cctz::time_zone tz; + const std::vector<std::string> names = AllTimeZoneNames(); + for (auto index = names.size(); state.KeepRunning(); ++index) { + if (index == names.size()) { + index = 0; + } + if (index == 0) { + state.PauseTiming(); + cctz::time_zone::Impl::ClearTimeZoneMapTestOnly(); + state.ResumeTiming(); + } + benchmark::DoNotOptimize(cctz::load_time_zone(names[index], &tz)); + } +} +BENCHMARK(BM_Zone_LoadAllTimeZonesFirst); + +void BM_Zone_LoadAllTimeZonesCached(benchmark::State& state) { + cctz::time_zone tz; + const std::vector<std::string> names = AllTimeZoneNames(); + for (const auto& name : names) { + cctz::load_time_zone(name, &tz); // prime cache + } + for (auto index = names.size(); state.KeepRunning(); ++index) { + if (index == names.size()) { + index = 0; + } + benchmark::DoNotOptimize(cctz::load_time_zone(names[index], &tz)); + } +} +BENCHMARK(BM_Zone_LoadAllTimeZonesCached); + +void BM_Zone_TimeZoneEqualityImplicit(benchmark::State& state) { + cctz::time_zone tz; // implicit UTC + while (state.KeepRunning()) { + benchmark::DoNotOptimize(tz == tz); + } +} +BENCHMARK(BM_Zone_TimeZoneEqualityImplicit); + +void BM_Zone_TimeZoneEqualityExplicit(benchmark::State& state) { + cctz::time_zone tz = cctz::utc_time_zone(); // explicit UTC + while (state.KeepRunning()) { + benchmark::DoNotOptimize(tz == tz); + } +} +BENCHMARK(BM_Zone_TimeZoneEqualityExplicit); + +void BM_Zone_UTCTimeZone(benchmark::State& state) { + cctz::time_zone tz; + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::utc_time_zone()); + } +} +BENCHMARK(BM_Zone_UTCTimeZone); + +// In each "ToCivil" benchmark we switch between two instants separated +// by at least one transition in order to defeat any internal caching of +// previous results (e.g., see local_time_hint_). +// +// The "UTC" variants use UTC instead of the Google/local time zone. + +void BM_Time_ToCivil_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = TestTimeZone(); + std::chrono::system_clock::time_point tp = + std::chrono::system_clock::from_time_t(1384569027); + std::chrono::system_clock::time_point tp2 = + std::chrono::system_clock::from_time_t(1418962578); + while (state.KeepRunning()) { + std::swap(tp, tp2); + tp += std::chrono::seconds(1); + benchmark::DoNotOptimize(cctz::convert(tp, tz)); + } +} +BENCHMARK(BM_Time_ToCivil_CCTZ); + +void BM_Time_ToCivil_Libc(benchmark::State& state) { + // No timezone support, so just use localtime. + time_t t = 1384569027; + time_t t2 = 1418962578; + struct tm tm; + while (state.KeepRunning()) { + std::swap(t, t2); + t += 1; +#if defined(_WIN32) || defined(_WIN64) + benchmark::DoNotOptimize(localtime_s(&tm, &t)); +#else + benchmark::DoNotOptimize(localtime_r(&t, &tm)); +#endif + } +} +BENCHMARK(BM_Time_ToCivil_Libc); + +void BM_Time_ToCivilUTC_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = cctz::utc_time_zone(); + std::chrono::system_clock::time_point tp = + std::chrono::system_clock::from_time_t(1384569027); + while (state.KeepRunning()) { + tp += std::chrono::seconds(1); + benchmark::DoNotOptimize(cctz::convert(tp, tz)); + } +} +BENCHMARK(BM_Time_ToCivilUTC_CCTZ); + +void BM_Time_ToCivilUTC_Libc(benchmark::State& state) { + time_t t = 1384569027; + struct tm tm; + while (state.KeepRunning()) { + t += 1; +#if defined(_WIN32) || defined(_WIN64) + benchmark::DoNotOptimize(gmtime_s(&tm, &t)); +#else + benchmark::DoNotOptimize(gmtime_r(&t, &tm)); +#endif + } +} +BENCHMARK(BM_Time_ToCivilUTC_Libc); + +// In each "FromCivil" benchmark we switch between two YMDhms values +// separated by at least one transition in order to defeat any internal +// caching of previous results (e.g., see time_local_hint_). +// +// The "UTC" variants use UTC instead of the Google/local time zone. +// The "Day0" variants require normalization of the day of month. + +void BM_Time_FromCivil_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = TestTimeZone(); + int i = 0; + while (state.KeepRunning()) { + if ((i++ & 1) == 0) { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2014, 12, 18, 20, 16, 18), tz)); + } else { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2013, 11, 15, 18, 30, 27), tz)); + } + } +} +BENCHMARK(BM_Time_FromCivil_CCTZ); + +void BM_Time_FromCivil_Libc(benchmark::State& state) { + // No timezone support, so just use localtime. + int i = 0; + while (state.KeepRunning()) { + struct tm tm; + if ((i++ & 1) == 0) { + tm.tm_year = 2014 - 1900; + tm.tm_mon = 12 - 1; + tm.tm_mday = 18; + tm.tm_hour = 20; + tm.tm_min = 16; + tm.tm_sec = 18; + } else { + tm.tm_year = 2013 - 1900; + tm.tm_mon = 11 - 1; + tm.tm_mday = 15; + tm.tm_hour = 18; + tm.tm_min = 30; + tm.tm_sec = 27; + } + tm.tm_isdst = -1; + benchmark::DoNotOptimize(mktime(&tm)); + } +} +BENCHMARK(BM_Time_FromCivil_Libc); + +void BM_Time_FromCivilUTC_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = cctz::utc_time_zone(); + while (state.KeepRunning()) { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2014, 12, 18, 20, 16, 18), tz)); + } +} +BENCHMARK(BM_Time_FromCivilUTC_CCTZ); + +// There is no BM_Time_FromCivilUTC_Libc. + +void BM_Time_FromCivilDay0_CCTZ(benchmark::State& state) { + const cctz::time_zone tz = TestTimeZone(); + int i = 0; + while (state.KeepRunning()) { + if ((i++ & 1) == 0) { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2014, 12, 0, 20, 16, 18), tz)); + } else { + benchmark::DoNotOptimize( + cctz::convert(cctz::civil_second(2013, 11, 0, 18, 30, 27), tz)); + } + } +} +BENCHMARK(BM_Time_FromCivilDay0_CCTZ); + +void BM_Time_FromCivilDay0_Libc(benchmark::State& state) { + // No timezone support, so just use localtime. + int i = 0; + while (state.KeepRunning()) { + struct tm tm; + if ((i++ & 1) == 0) { + tm.tm_year = 2014 - 1900; + tm.tm_mon = 12 - 1; + tm.tm_mday = 0; + tm.tm_hour = 20; + tm.tm_min = 16; + tm.tm_sec = 18; + } else { + tm.tm_year = 2013 - 1900; + tm.tm_mon = 11 - 1; + tm.tm_mday = 0; + tm.tm_hour = 18; + tm.tm_min = 30; + tm.tm_sec = 27; + } + tm.tm_isdst = -1; + benchmark::DoNotOptimize(mktime(&tm)); + } +} +BENCHMARK(BM_Time_FromCivilDay0_Libc); + +const char* const kFormats[] = { + RFC1123_full, // 0 + RFC1123_no_wday, // 1 + RFC3339_full, // 2 + RFC3339_sec, // 3 + "%Y-%m-%dT%H:%M:%S", // 4 + "%Y-%m-%d", // 5 +}; +const int kNumFormats = sizeof(kFormats) / sizeof(kFormats[0]); + +void BM_Format_FormatTime(benchmark::State& state) { + const std::string fmt = kFormats[state.range(0)]; + state.SetLabel(fmt); + const cctz::time_zone tz = TestTimeZone(); + const std::chrono::system_clock::time_point tp = + cctz::convert(cctz::civil_second(1977, 6, 28, 9, 8, 7), tz) + + std::chrono::microseconds(1); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::format(fmt, tp, tz)); + } +} +BENCHMARK(BM_Format_FormatTime)->DenseRange(0, kNumFormats - 1); + +void BM_Format_ParseTime(benchmark::State& state) { + const std::string fmt = kFormats[state.range(0)]; + state.SetLabel(fmt); + const cctz::time_zone tz = TestTimeZone(); + std::chrono::system_clock::time_point tp = + cctz::convert(cctz::civil_second(1977, 6, 28, 9, 8, 7), tz) + + std::chrono::microseconds(1); + const std::string when = cctz::format(fmt, tp, tz); + while (state.KeepRunning()) { + benchmark::DoNotOptimize(cctz::parse(fmt, when, tz, &tp)); + } +} +BENCHMARK(BM_Format_ParseTime)->DenseRange(0, kNumFormats - 1); + +} // namespace diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/civil_time_detail.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/civil_time_detail.cc new file mode 100644 index 0000000000..0b07e397e5 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/civil_time_detail.cc @@ -0,0 +1,94 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "absl/time/internal/cctz/include/cctz/civil_time_detail.h" + +#include <iomanip> +#include <ostream> +#include <sstream> + +#include "absl/base/config.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { +namespace detail { + +// Output stream operators output a format matching YYYY-MM-DDThh:mm:ss, +// while omitting fields inferior to the type's alignment. For example, +// civil_day is formatted only as YYYY-MM-DD. +std::ostream& operator<<(std::ostream& os, const civil_year& y) { + std::stringstream ss; + ss << y.year(); // No padding. + return os << ss.str(); +} +std::ostream& operator<<(std::ostream& os, const civil_month& m) { + std::stringstream ss; + ss << civil_year(m) << '-'; + ss << std::setfill('0') << std::setw(2) << m.month(); + return os << ss.str(); +} +std::ostream& operator<<(std::ostream& os, const civil_day& d) { + std::stringstream ss; + ss << civil_month(d) << '-'; + ss << std::setfill('0') << std::setw(2) << d.day(); + return os << ss.str(); +} +std::ostream& operator<<(std::ostream& os, const civil_hour& h) { + std::stringstream ss; + ss << civil_day(h) << 'T'; + ss << std::setfill('0') << std::setw(2) << h.hour(); + return os << ss.str(); +} +std::ostream& operator<<(std::ostream& os, const civil_minute& m) { + std::stringstream ss; + ss << civil_hour(m) << ':'; + ss << std::setfill('0') << std::setw(2) << m.minute(); + return os << ss.str(); +} +std::ostream& operator<<(std::ostream& os, const civil_second& s) { + std::stringstream ss; + ss << civil_minute(s) << ':'; + ss << std::setfill('0') << std::setw(2) << s.second(); + return os << ss.str(); +} + +//////////////////////////////////////////////////////////////////////// + +std::ostream& operator<<(std::ostream& os, weekday wd) { + switch (wd) { + case weekday::monday: + return os << "Monday"; + case weekday::tuesday: + return os << "Tuesday"; + case weekday::wednesday: + return os << "Wednesday"; + case weekday::thursday: + return os << "Thursday"; + case weekday::friday: + return os << "Friday"; + case weekday::saturday: + return os << "Saturday"; + case weekday::sunday: + return os << "Sunday"; + } + return os; // Should never get here, but -Wreturn-type may warn without this. +} + +} // namespace detail +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/civil_time_test.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/civil_time_test.cc new file mode 100644 index 0000000000..be894d7072 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/civil_time_test.cc @@ -0,0 +1,1056 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "absl/time/internal/cctz/include/cctz/civil_time.h" + +#include <iomanip> +#include <limits> +#include <sstream> +#include <string> +#include <type_traits> + +#include "gtest/gtest.h" +#include "absl/base/config.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +namespace { + +template <typename T> +std::string Format(const T& t) { + std::stringstream ss; + ss << t; + return ss.str(); +} + +} // namespace + +#if __cpp_constexpr >= 201304 || (defined(_MSC_VER) && _MSC_VER >= 1910) +// Construction constexpr tests + +TEST(CivilTime, Normal) { + constexpr civil_second css(2016, 1, 28, 17, 14, 12); + static_assert(css.second() == 12, "Normal.second"); + constexpr civil_minute cmm(2016, 1, 28, 17, 14); + static_assert(cmm.minute() == 14, "Normal.minute"); + constexpr civil_hour chh(2016, 1, 28, 17); + static_assert(chh.hour() == 17, "Normal.hour"); + constexpr civil_day cd(2016, 1, 28); + static_assert(cd.day() == 28, "Normal.day"); + constexpr civil_month cm(2016, 1); + static_assert(cm.month() == 1, "Normal.month"); + constexpr civil_year cy(2016); + static_assert(cy.year() == 2016, "Normal.year"); +} + +TEST(CivilTime, Conversion) { + constexpr civil_year cy(2016); + static_assert(cy.year() == 2016, "Conversion.year"); + constexpr civil_month cm(cy); + static_assert(cm.month() == 1, "Conversion.month"); + constexpr civil_day cd(cm); + static_assert(cd.day() == 1, "Conversion.day"); + constexpr civil_hour chh(cd); + static_assert(chh.hour() == 0, "Conversion.hour"); + constexpr civil_minute cmm(chh); + static_assert(cmm.minute() == 0, "Conversion.minute"); + constexpr civil_second css(cmm); + static_assert(css.second() == 0, "Conversion.second"); +} + +// Normalization constexpr tests + +TEST(CivilTime, Normalized) { + constexpr civil_second cs(2016, 1, 28, 17, 14, 12); + static_assert(cs.year() == 2016, "Normalized.year"); + static_assert(cs.month() == 1, "Normalized.month"); + static_assert(cs.day() == 28, "Normalized.day"); + static_assert(cs.hour() == 17, "Normalized.hour"); + static_assert(cs.minute() == 14, "Normalized.minute"); + static_assert(cs.second() == 12, "Normalized.second"); +} + +TEST(CivilTime, SecondOverflow) { + constexpr civil_second cs(2016, 1, 28, 17, 14, 121); + static_assert(cs.year() == 2016, "SecondOverflow.year"); + static_assert(cs.month() == 1, "SecondOverflow.month"); + static_assert(cs.day() == 28, "SecondOverflow.day"); + static_assert(cs.hour() == 17, "SecondOverflow.hour"); + static_assert(cs.minute() == 16, "SecondOverflow.minute"); + static_assert(cs.second() == 1, "SecondOverflow.second"); +} + +TEST(CivilTime, SecondUnderflow) { + constexpr civil_second cs(2016, 1, 28, 17, 14, -121); + static_assert(cs.year() == 2016, "SecondUnderflow.year"); + static_assert(cs.month() == 1, "SecondUnderflow.month"); + static_assert(cs.day() == 28, "SecondUnderflow.day"); + static_assert(cs.hour() == 17, "SecondUnderflow.hour"); + static_assert(cs.minute() == 11, "SecondUnderflow.minute"); + static_assert(cs.second() == 59, "SecondUnderflow.second"); +} + +TEST(CivilTime, MinuteOverflow) { + constexpr civil_second cs(2016, 1, 28, 17, 121, 12); + static_assert(cs.year() == 2016, "MinuteOverflow.year"); + static_assert(cs.month() == 1, "MinuteOverflow.month"); + static_assert(cs.day() == 28, "MinuteOverflow.day"); + static_assert(cs.hour() == 19, "MinuteOverflow.hour"); + static_assert(cs.minute() == 1, "MinuteOverflow.minute"); + static_assert(cs.second() == 12, "MinuteOverflow.second"); +} + +TEST(CivilTime, MinuteUnderflow) { + constexpr civil_second cs(2016, 1, 28, 17, -121, 12); + static_assert(cs.year() == 2016, "MinuteUnderflow.year"); + static_assert(cs.month() == 1, "MinuteUnderflow.month"); + static_assert(cs.day() == 28, "MinuteUnderflow.day"); + static_assert(cs.hour() == 14, "MinuteUnderflow.hour"); + static_assert(cs.minute() == 59, "MinuteUnderflow.minute"); + static_assert(cs.second() == 12, "MinuteUnderflow.second"); +} + +TEST(CivilTime, HourOverflow) { + constexpr civil_second cs(2016, 1, 28, 49, 14, 12); + static_assert(cs.year() == 2016, "HourOverflow.year"); + static_assert(cs.month() == 1, "HourOverflow.month"); + static_assert(cs.day() == 30, "HourOverflow.day"); + static_assert(cs.hour() == 1, "HourOverflow.hour"); + static_assert(cs.minute() == 14, "HourOverflow.minute"); + static_assert(cs.second() == 12, "HourOverflow.second"); +} + +TEST(CivilTime, HourUnderflow) { + constexpr civil_second cs(2016, 1, 28, -49, 14, 12); + static_assert(cs.year() == 2016, "HourUnderflow.year"); + static_assert(cs.month() == 1, "HourUnderflow.month"); + static_assert(cs.day() == 25, "HourUnderflow.day"); + static_assert(cs.hour() == 23, "HourUnderflow.hour"); + static_assert(cs.minute() == 14, "HourUnderflow.minute"); + static_assert(cs.second() == 12, "HourUnderflow.second"); +} + +TEST(CivilTime, MonthOverflow) { + constexpr civil_second cs(2016, 25, 28, 17, 14, 12); + static_assert(cs.year() == 2018, "MonthOverflow.year"); + static_assert(cs.month() == 1, "MonthOverflow.month"); + static_assert(cs.day() == 28, "MonthOverflow.day"); + static_assert(cs.hour() == 17, "MonthOverflow.hour"); + static_assert(cs.minute() == 14, "MonthOverflow.minute"); + static_assert(cs.second() == 12, "MonthOverflow.second"); +} + +TEST(CivilTime, MonthUnderflow) { + constexpr civil_second cs(2016, -25, 28, 17, 14, 12); + static_assert(cs.year() == 2013, "MonthUnderflow.year"); + static_assert(cs.month() == 11, "MonthUnderflow.month"); + static_assert(cs.day() == 28, "MonthUnderflow.day"); + static_assert(cs.hour() == 17, "MonthUnderflow.hour"); + static_assert(cs.minute() == 14, "MonthUnderflow.minute"); + static_assert(cs.second() == 12, "MonthUnderflow.second"); +} + +TEST(CivilTime, C4Overflow) { + constexpr civil_second cs(2016, 1, 292195, 17, 14, 12); + static_assert(cs.year() == 2816, "C4Overflow.year"); + static_assert(cs.month() == 1, "C4Overflow.month"); + static_assert(cs.day() == 1, "C4Overflow.day"); + static_assert(cs.hour() == 17, "C4Overflow.hour"); + static_assert(cs.minute() == 14, "C4Overflow.minute"); + static_assert(cs.second() == 12, "C4Overflow.second"); +} + +TEST(CivilTime, C4Underflow) { + constexpr civil_second cs(2016, 1, -292195, 17, 14, 12); + static_assert(cs.year() == 1215, "C4Underflow.year"); + static_assert(cs.month() == 12, "C4Underflow.month"); + static_assert(cs.day() == 30, "C4Underflow.day"); + static_assert(cs.hour() == 17, "C4Underflow.hour"); + static_assert(cs.minute() == 14, "C4Underflow.minute"); + static_assert(cs.second() == 12, "C4Underflow.second"); +} + +TEST(CivilTime, MixedNormalization) { + constexpr civil_second cs(2016, -42, 122, 99, -147, 4949); + static_assert(cs.year() == 2012, "MixedNormalization.year"); + static_assert(cs.month() == 10, "MixedNormalization.month"); + static_assert(cs.day() == 4, "MixedNormalization.day"); + static_assert(cs.hour() == 1, "MixedNormalization.hour"); + static_assert(cs.minute() == 55, "MixedNormalization.minute"); + static_assert(cs.second() == 29, "MixedNormalization.second"); +} + +// Relational constexpr tests + +TEST(CivilTime, Less) { + constexpr civil_second cs1(2016, 1, 28, 17, 14, 12); + constexpr civil_second cs2(2016, 1, 28, 17, 14, 13); + constexpr bool less = cs1 < cs2; + static_assert(less, "Less"); +} + +// Arithmetic constexpr tests + +TEST(CivilTime, Addition) { + constexpr civil_second cs1(2016, 1, 28, 17, 14, 12); + constexpr civil_second cs2 = cs1 + 50; + static_assert(cs2.year() == 2016, "Addition.year"); + static_assert(cs2.month() == 1, "Addition.month"); + static_assert(cs2.day() == 28, "Addition.day"); + static_assert(cs2.hour() == 17, "Addition.hour"); + static_assert(cs2.minute() == 15, "Addition.minute"); + static_assert(cs2.second() == 2, "Addition.second"); +} + +TEST(CivilTime, Subtraction) { + constexpr civil_second cs1(2016, 1, 28, 17, 14, 12); + constexpr civil_second cs2 = cs1 - 50; + static_assert(cs2.year() == 2016, "Subtraction.year"); + static_assert(cs2.month() == 1, "Subtraction.month"); + static_assert(cs2.day() == 28, "Subtraction.day"); + static_assert(cs2.hour() == 17, "Subtraction.hour"); + static_assert(cs2.minute() == 13, "Subtraction.minute"); + static_assert(cs2.second() == 22, "Subtraction.second"); +} + +TEST(CivilTime, Difference) { + constexpr civil_day cd1(2016, 1, 28); + constexpr civil_day cd2(2015, 1, 28); + constexpr int diff = cd1 - cd2; + static_assert(diff == 365, "Difference"); +} + +// NOTE: Run this with --copt=-ftrapv to detect overflow problems. +TEST(CivilTime, DifferenceWithHugeYear) { + { + constexpr civil_day d1(9223372036854775807, 1, 1); + constexpr civil_day d2(9223372036854775807, 12, 31); + static_assert(d2 - d1 == 364, "DifferenceWithHugeYear"); + } + { + constexpr civil_day d1(-9223372036854775807 - 1, 1, 1); + constexpr civil_day d2(-9223372036854775807 - 1, 12, 31); + static_assert(d2 - d1 == 365, "DifferenceWithHugeYear"); + } + { + // Check the limits of the return value at the end of the year range. + constexpr civil_day d1(9223372036854775807, 1, 1); + constexpr civil_day d2(9198119301927009252, 6, 6); + static_assert(d1 - d2 == 9223372036854775807, "DifferenceWithHugeYear"); + static_assert((d2 - 1) - d1 == -9223372036854775807 - 1, + "DifferenceWithHugeYear"); + } + { + // Check the limits of the return value at the start of the year range. + constexpr civil_day d1(-9223372036854775807 - 1, 1, 1); + constexpr civil_day d2(-9198119301927009254, 7, 28); + static_assert(d2 - d1 == 9223372036854775807, "DifferenceWithHugeYear"); + static_assert(d1 - (d2 + 1) == -9223372036854775807 - 1, + "DifferenceWithHugeYear"); + } + { + // Check the limits of the return value from either side of year 0. + constexpr civil_day d1(-12626367463883278, 9, 3); + constexpr civil_day d2(12626367463883277, 3, 28); + static_assert(d2 - d1 == 9223372036854775807, "DifferenceWithHugeYear"); + static_assert(d1 - (d2 + 1) == -9223372036854775807 - 1, + "DifferenceWithHugeYear"); + } +} + +// NOTE: Run this with --copt=-ftrapv to detect overflow problems. +TEST(CivilTime, DifferenceNoIntermediateOverflow) { + { + // The difference up to the minute field would be below the minimum + // diff_t, but the 52 extra seconds brings us back to the minimum. + constexpr civil_second s1(-292277022657, 1, 27, 8, 29 - 1, 52); + constexpr civil_second s2(1970, 1, 1, 0, 0 - 1, 0); + static_assert(s1 - s2 == -9223372036854775807 - 1, + "DifferenceNoIntermediateOverflow"); + } + { + // The difference up to the minute field would be above the maximum + // diff_t, but the -53 extra seconds brings us back to the maximum. + constexpr civil_second s1(292277026596, 12, 4, 15, 30, 7 - 7); + constexpr civil_second s2(1970, 1, 1, 0, 0, 0 - 7); + static_assert(s1 - s2 == 9223372036854775807, + "DifferenceNoIntermediateOverflow"); + } +} + +// Helper constexpr tests + +TEST(CivilTime, WeekDay) { + constexpr civil_day cd(2016, 1, 28); + constexpr weekday wd = get_weekday(cd); + static_assert(wd == weekday::thursday, "Weekday"); +} + +TEST(CivilTime, NextWeekDay) { + constexpr civil_day cd(2016, 1, 28); + constexpr civil_day next = next_weekday(cd, weekday::thursday); + static_assert(next.year() == 2016, "NextWeekDay.year"); + static_assert(next.month() == 2, "NextWeekDay.month"); + static_assert(next.day() == 4, "NextWeekDay.day"); +} + +TEST(CivilTime, PrevWeekDay) { + constexpr civil_day cd(2016, 1, 28); + constexpr civil_day prev = prev_weekday(cd, weekday::thursday); + static_assert(prev.year() == 2016, "PrevWeekDay.year"); + static_assert(prev.month() == 1, "PrevWeekDay.month"); + static_assert(prev.day() == 21, "PrevWeekDay.day"); +} + +TEST(CivilTime, YearDay) { + constexpr civil_day cd(2016, 1, 28); + constexpr int yd = get_yearday(cd); + static_assert(yd == 28, "YearDay"); +} +#endif // __cpp_constexpr >= 201304 || (defined(_MSC_VER) && _MSC_VER >= 1910) + +// The remaining tests do not use constexpr. + +TEST(CivilTime, DefaultConstruction) { + civil_second ss; + EXPECT_EQ("1970-01-01T00:00:00", Format(ss)); + + civil_minute mm; + EXPECT_EQ("1970-01-01T00:00", Format(mm)); + + civil_hour hh; + EXPECT_EQ("1970-01-01T00", Format(hh)); + + civil_day d; + EXPECT_EQ("1970-01-01", Format(d)); + + civil_month m; + EXPECT_EQ("1970-01", Format(m)); + + civil_year y; + EXPECT_EQ("1970", Format(y)); +} + +TEST(CivilTime, StructMember) { + struct S { + civil_day day; + }; + S s = {}; + EXPECT_EQ(civil_day{}, s.day); +} + +TEST(CivilTime, FieldsConstruction) { + EXPECT_EQ("2015-01-02T03:04:05", Format(civil_second(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01-02T03:04:00", Format(civil_second(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01-02T03:00:00", Format(civil_second(2015, 1, 2, 3))); + EXPECT_EQ("2015-01-02T00:00:00", Format(civil_second(2015, 1, 2))); + EXPECT_EQ("2015-01-01T00:00:00", Format(civil_second(2015, 1))); + EXPECT_EQ("2015-01-01T00:00:00", Format(civil_second(2015))); + + EXPECT_EQ("2015-01-02T03:04", Format(civil_minute(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01-02T03:04", Format(civil_minute(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01-02T03:00", Format(civil_minute(2015, 1, 2, 3))); + EXPECT_EQ("2015-01-02T00:00", Format(civil_minute(2015, 1, 2))); + EXPECT_EQ("2015-01-01T00:00", Format(civil_minute(2015, 1))); + EXPECT_EQ("2015-01-01T00:00", Format(civil_minute(2015))); + + EXPECT_EQ("2015-01-02T03", Format(civil_hour(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01-02T03", Format(civil_hour(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01-02T03", Format(civil_hour(2015, 1, 2, 3))); + EXPECT_EQ("2015-01-02T00", Format(civil_hour(2015, 1, 2))); + EXPECT_EQ("2015-01-01T00", Format(civil_hour(2015, 1))); + EXPECT_EQ("2015-01-01T00", Format(civil_hour(2015))); + + EXPECT_EQ("2015-01-02", Format(civil_day(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01-02", Format(civil_day(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01-02", Format(civil_day(2015, 1, 2, 3))); + EXPECT_EQ("2015-01-02", Format(civil_day(2015, 1, 2))); + EXPECT_EQ("2015-01-01", Format(civil_day(2015, 1))); + EXPECT_EQ("2015-01-01", Format(civil_day(2015))); + + EXPECT_EQ("2015-01", Format(civil_month(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015-01", Format(civil_month(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015-01", Format(civil_month(2015, 1, 2, 3))); + EXPECT_EQ("2015-01", Format(civil_month(2015, 1, 2))); + EXPECT_EQ("2015-01", Format(civil_month(2015, 1))); + EXPECT_EQ("2015-01", Format(civil_month(2015))); + + EXPECT_EQ("2015", Format(civil_year(2015, 1, 2, 3, 4, 5))); + EXPECT_EQ("2015", Format(civil_year(2015, 1, 2, 3, 4))); + EXPECT_EQ("2015", Format(civil_year(2015, 1, 2, 3))); + EXPECT_EQ("2015", Format(civil_year(2015, 1, 2))); + EXPECT_EQ("2015", Format(civil_year(2015, 1))); + EXPECT_EQ("2015", Format(civil_year(2015))); +} + +TEST(CivilTime, FieldsConstructionLimits) { + const int kIntMax = std::numeric_limits<int>::max(); + EXPECT_EQ("2038-01-19T03:14:07", + Format(civil_second(1970, 1, 1, 0, 0, kIntMax))); + EXPECT_EQ("6121-02-11T05:21:07", + Format(civil_second(1970, 1, 1, 0, kIntMax, kIntMax))); + EXPECT_EQ("251104-11-20T12:21:07", + Format(civil_second(1970, 1, 1, kIntMax, kIntMax, kIntMax))); + EXPECT_EQ("6130715-05-30T12:21:07", + Format(civil_second(1970, 1, kIntMax, kIntMax, kIntMax, kIntMax))); + EXPECT_EQ( + "185087685-11-26T12:21:07", + Format(civil_second(1970, kIntMax, kIntMax, kIntMax, kIntMax, kIntMax))); + + const int kIntMin = std::numeric_limits<int>::min(); + EXPECT_EQ("1901-12-13T20:45:52", + Format(civil_second(1970, 1, 1, 0, 0, kIntMin))); + EXPECT_EQ("-2182-11-20T18:37:52", + Format(civil_second(1970, 1, 1, 0, kIntMin, kIntMin))); + EXPECT_EQ("-247165-02-11T10:37:52", + Format(civil_second(1970, 1, 1, kIntMin, kIntMin, kIntMin))); + EXPECT_EQ("-6126776-08-01T10:37:52", + Format(civil_second(1970, 1, kIntMin, kIntMin, kIntMin, kIntMin))); + EXPECT_EQ( + "-185083747-10-31T10:37:52", + Format(civil_second(1970, kIntMin, kIntMin, kIntMin, kIntMin, kIntMin))); +} + +TEST(CivilTime, ImplicitCrossAlignment) { + civil_year year(2015); + civil_month month = year; + civil_day day = month; + civil_hour hour = day; + civil_minute minute = hour; + civil_second second = minute; + + second = year; + EXPECT_EQ(second, year); + second = month; + EXPECT_EQ(second, month); + second = day; + EXPECT_EQ(second, day); + second = hour; + EXPECT_EQ(second, hour); + second = minute; + EXPECT_EQ(second, minute); + + minute = year; + EXPECT_EQ(minute, year); + minute = month; + EXPECT_EQ(minute, month); + minute = day; + EXPECT_EQ(minute, day); + minute = hour; + EXPECT_EQ(minute, hour); + + hour = year; + EXPECT_EQ(hour, year); + hour = month; + EXPECT_EQ(hour, month); + hour = day; + EXPECT_EQ(hour, day); + + day = year; + EXPECT_EQ(day, year); + day = month; + EXPECT_EQ(day, month); + + month = year; + EXPECT_EQ(month, year); + + // Ensures unsafe conversions are not allowed. + EXPECT_FALSE((std::is_convertible<civil_second, civil_minute>::value)); + EXPECT_FALSE((std::is_convertible<civil_second, civil_hour>::value)); + EXPECT_FALSE((std::is_convertible<civil_second, civil_day>::value)); + EXPECT_FALSE((std::is_convertible<civil_second, civil_month>::value)); + EXPECT_FALSE((std::is_convertible<civil_second, civil_year>::value)); + + EXPECT_FALSE((std::is_convertible<civil_minute, civil_hour>::value)); + EXPECT_FALSE((std::is_convertible<civil_minute, civil_day>::value)); + EXPECT_FALSE((std::is_convertible<civil_minute, civil_month>::value)); + EXPECT_FALSE((std::is_convertible<civil_minute, civil_year>::value)); + + EXPECT_FALSE((std::is_convertible<civil_hour, civil_day>::value)); + EXPECT_FALSE((std::is_convertible<civil_hour, civil_month>::value)); + EXPECT_FALSE((std::is_convertible<civil_hour, civil_year>::value)); + + EXPECT_FALSE((std::is_convertible<civil_day, civil_month>::value)); + EXPECT_FALSE((std::is_convertible<civil_day, civil_year>::value)); + + EXPECT_FALSE((std::is_convertible<civil_month, civil_year>::value)); +} + +TEST(CivilTime, ExplicitCrossAlignment) { + // + // Assign from smaller units -> larger units + // + + civil_second second(2015, 1, 2, 3, 4, 5); + EXPECT_EQ("2015-01-02T03:04:05", Format(second)); + + civil_minute minute(second); + EXPECT_EQ("2015-01-02T03:04", Format(minute)); + + civil_hour hour(minute); + EXPECT_EQ("2015-01-02T03", Format(hour)); + + civil_day day(hour); + EXPECT_EQ("2015-01-02", Format(day)); + + civil_month month(day); + EXPECT_EQ("2015-01", Format(month)); + + civil_year year(month); + EXPECT_EQ("2015", Format(year)); + + // + // Now assign from larger units -> smaller units + // + + month = civil_month(year); + EXPECT_EQ("2015-01", Format(month)); + + day = civil_day(month); + EXPECT_EQ("2015-01-01", Format(day)); + + hour = civil_hour(day); + EXPECT_EQ("2015-01-01T00", Format(hour)); + + minute = civil_minute(hour); + EXPECT_EQ("2015-01-01T00:00", Format(minute)); + + second = civil_second(minute); + EXPECT_EQ("2015-01-01T00:00:00", Format(second)); +} + +// Metafunction to test whether difference is allowed between two types. +template <typename T1, typename T2> +struct HasDifference { + template <typename U1, typename U2> + static std::false_type test(...); + template <typename U1, typename U2> + static std::true_type test(decltype(std::declval<U1>() - std::declval<U2>())); + static constexpr bool value = decltype(test<T1, T2>(0))::value; +}; + +TEST(CivilTime, DisallowCrossAlignedDifference) { + // Difference is allowed between types with the same alignment. + static_assert(HasDifference<civil_second, civil_second>::value, ""); + static_assert(HasDifference<civil_minute, civil_minute>::value, ""); + static_assert(HasDifference<civil_hour, civil_hour>::value, ""); + static_assert(HasDifference<civil_day, civil_day>::value, ""); + static_assert(HasDifference<civil_month, civil_month>::value, ""); + static_assert(HasDifference<civil_year, civil_year>::value, ""); + + // Difference is disallowed between types with different alignments. + static_assert(!HasDifference<civil_second, civil_minute>::value, ""); + static_assert(!HasDifference<civil_second, civil_hour>::value, ""); + static_assert(!HasDifference<civil_second, civil_day>::value, ""); + static_assert(!HasDifference<civil_second, civil_month>::value, ""); + static_assert(!HasDifference<civil_second, civil_year>::value, ""); + + static_assert(!HasDifference<civil_minute, civil_hour>::value, ""); + static_assert(!HasDifference<civil_minute, civil_day>::value, ""); + static_assert(!HasDifference<civil_minute, civil_month>::value, ""); + static_assert(!HasDifference<civil_minute, civil_year>::value, ""); + + static_assert(!HasDifference<civil_hour, civil_day>::value, ""); + static_assert(!HasDifference<civil_hour, civil_month>::value, ""); + static_assert(!HasDifference<civil_hour, civil_year>::value, ""); + + static_assert(!HasDifference<civil_day, civil_month>::value, ""); + static_assert(!HasDifference<civil_day, civil_year>::value, ""); + + static_assert(!HasDifference<civil_month, civil_year>::value, ""); +} + +TEST(CivilTime, ValueSemantics) { + const civil_hour a(2015, 1, 2, 3); + const civil_hour b = a; + const civil_hour c(b); + civil_hour d; + d = c; + EXPECT_EQ("2015-01-02T03", Format(d)); +} + +TEST(CivilTime, Relational) { + // Tests that the alignment unit is ignored in comparison. + const civil_year year(2014); + const civil_month month(year); + EXPECT_EQ(year, month); + +#define TEST_RELATIONAL(OLDER, YOUNGER) \ + do { \ + EXPECT_FALSE(OLDER < OLDER); \ + EXPECT_FALSE(OLDER > OLDER); \ + EXPECT_TRUE(OLDER >= OLDER); \ + EXPECT_TRUE(OLDER <= OLDER); \ + EXPECT_FALSE(YOUNGER < YOUNGER); \ + EXPECT_FALSE(YOUNGER > YOUNGER); \ + EXPECT_TRUE(YOUNGER >= YOUNGER); \ + EXPECT_TRUE(YOUNGER <= YOUNGER); \ + EXPECT_EQ(OLDER, OLDER); \ + EXPECT_NE(OLDER, YOUNGER); \ + EXPECT_LT(OLDER, YOUNGER); \ + EXPECT_LE(OLDER, YOUNGER); \ + EXPECT_GT(YOUNGER, OLDER); \ + EXPECT_GE(YOUNGER, OLDER); \ + } while (0) + + // Alignment is ignored in comparison (verified above), so kSecond is used + // to test comparison in all field positions. + TEST_RELATIONAL(civil_second(2014, 1, 1, 0, 0, 0), + civil_second(2015, 1, 1, 0, 0, 0)); + TEST_RELATIONAL(civil_second(2014, 1, 1, 0, 0, 0), + civil_second(2014, 2, 1, 0, 0, 0)); + TEST_RELATIONAL(civil_second(2014, 1, 1, 0, 0, 0), + civil_second(2014, 1, 2, 0, 0, 0)); + TEST_RELATIONAL(civil_second(2014, 1, 1, 0, 0, 0), + civil_second(2014, 1, 1, 1, 0, 0)); + TEST_RELATIONAL(civil_second(2014, 1, 1, 1, 0, 0), + civil_second(2014, 1, 1, 1, 1, 0)); + TEST_RELATIONAL(civil_second(2014, 1, 1, 1, 1, 0), + civil_second(2014, 1, 1, 1, 1, 1)); + + // Tests the relational operators of two different civil-time types. + TEST_RELATIONAL(civil_day(2014, 1, 1), civil_minute(2014, 1, 1, 1, 1)); + TEST_RELATIONAL(civil_day(2014, 1, 1), civil_month(2014, 2)); + +#undef TEST_RELATIONAL +} + +TEST(CivilTime, Arithmetic) { + civil_second second(2015, 1, 2, 3, 4, 5); + EXPECT_EQ("2015-01-02T03:04:06", Format(second += 1)); + EXPECT_EQ("2015-01-02T03:04:07", Format(second + 1)); + EXPECT_EQ("2015-01-02T03:04:08", Format(2 + second)); + EXPECT_EQ("2015-01-02T03:04:05", Format(second - 1)); + EXPECT_EQ("2015-01-02T03:04:05", Format(second -= 1)); + EXPECT_EQ("2015-01-02T03:04:05", Format(second++)); + EXPECT_EQ("2015-01-02T03:04:07", Format(++second)); + EXPECT_EQ("2015-01-02T03:04:07", Format(second--)); + EXPECT_EQ("2015-01-02T03:04:05", Format(--second)); + + civil_minute minute(2015, 1, 2, 3, 4); + EXPECT_EQ("2015-01-02T03:05", Format(minute += 1)); + EXPECT_EQ("2015-01-02T03:06", Format(minute + 1)); + EXPECT_EQ("2015-01-02T03:07", Format(2 + minute)); + EXPECT_EQ("2015-01-02T03:04", Format(minute - 1)); + EXPECT_EQ("2015-01-02T03:04", Format(minute -= 1)); + EXPECT_EQ("2015-01-02T03:04", Format(minute++)); + EXPECT_EQ("2015-01-02T03:06", Format(++minute)); + EXPECT_EQ("2015-01-02T03:06", Format(minute--)); + EXPECT_EQ("2015-01-02T03:04", Format(--minute)); + + civil_hour hour(2015, 1, 2, 3); + EXPECT_EQ("2015-01-02T04", Format(hour += 1)); + EXPECT_EQ("2015-01-02T05", Format(hour + 1)); + EXPECT_EQ("2015-01-02T06", Format(2 + hour)); + EXPECT_EQ("2015-01-02T03", Format(hour - 1)); + EXPECT_EQ("2015-01-02T03", Format(hour -= 1)); + EXPECT_EQ("2015-01-02T03", Format(hour++)); + EXPECT_EQ("2015-01-02T05", Format(++hour)); + EXPECT_EQ("2015-01-02T05", Format(hour--)); + EXPECT_EQ("2015-01-02T03", Format(--hour)); + + civil_day day(2015, 1, 2); + EXPECT_EQ("2015-01-03", Format(day += 1)); + EXPECT_EQ("2015-01-04", Format(day + 1)); + EXPECT_EQ("2015-01-05", Format(2 + day)); + EXPECT_EQ("2015-01-02", Format(day - 1)); + EXPECT_EQ("2015-01-02", Format(day -= 1)); + EXPECT_EQ("2015-01-02", Format(day++)); + EXPECT_EQ("2015-01-04", Format(++day)); + EXPECT_EQ("2015-01-04", Format(day--)); + EXPECT_EQ("2015-01-02", Format(--day)); + + civil_month month(2015, 1); + EXPECT_EQ("2015-02", Format(month += 1)); + EXPECT_EQ("2015-03", Format(month + 1)); + EXPECT_EQ("2015-04", Format(2 + month)); + EXPECT_EQ("2015-01", Format(month - 1)); + EXPECT_EQ("2015-01", Format(month -= 1)); + EXPECT_EQ("2015-01", Format(month++)); + EXPECT_EQ("2015-03", Format(++month)); + EXPECT_EQ("2015-03", Format(month--)); + EXPECT_EQ("2015-01", Format(--month)); + + civil_year year(2015); + EXPECT_EQ("2016", Format(year += 1)); + EXPECT_EQ("2017", Format(year + 1)); + EXPECT_EQ("2018", Format(2 + year)); + EXPECT_EQ("2015", Format(year - 1)); + EXPECT_EQ("2015", Format(year -= 1)); + EXPECT_EQ("2015", Format(year++)); + EXPECT_EQ("2017", Format(++year)); + EXPECT_EQ("2017", Format(year--)); + EXPECT_EQ("2015", Format(--year)); +} + +TEST(CivilTime, ArithmeticLimits) { + const int kIntMax = std::numeric_limits<int>::max(); + const int kIntMin = std::numeric_limits<int>::min(); + + civil_second second(1970, 1, 1, 0, 0, 0); + second += kIntMax; + EXPECT_EQ("2038-01-19T03:14:07", Format(second)); + second -= kIntMax; + EXPECT_EQ("1970-01-01T00:00:00", Format(second)); + second += kIntMin; + EXPECT_EQ("1901-12-13T20:45:52", Format(second)); + second -= kIntMin; + EXPECT_EQ("1970-01-01T00:00:00", Format(second)); + + civil_minute minute(1970, 1, 1, 0, 0); + minute += kIntMax; + EXPECT_EQ("6053-01-23T02:07", Format(minute)); + minute -= kIntMax; + EXPECT_EQ("1970-01-01T00:00", Format(minute)); + minute += kIntMin; + EXPECT_EQ("-2114-12-08T21:52", Format(minute)); + minute -= kIntMin; + EXPECT_EQ("1970-01-01T00:00", Format(minute)); + + civil_hour hour(1970, 1, 1, 0); + hour += kIntMax; + EXPECT_EQ("246953-10-09T07", Format(hour)); + hour -= kIntMax; + EXPECT_EQ("1970-01-01T00", Format(hour)); + hour += kIntMin; + EXPECT_EQ("-243014-03-24T16", Format(hour)); + hour -= kIntMin; + EXPECT_EQ("1970-01-01T00", Format(hour)); + + civil_day day(1970, 1, 1); + day += kIntMax; + EXPECT_EQ("5881580-07-11", Format(day)); + day -= kIntMax; + EXPECT_EQ("1970-01-01", Format(day)); + day += kIntMin; + EXPECT_EQ("-5877641-06-23", Format(day)); + day -= kIntMin; + EXPECT_EQ("1970-01-01", Format(day)); + + civil_month month(1970, 1); + month += kIntMax; + EXPECT_EQ("178958940-08", Format(month)); + month -= kIntMax; + EXPECT_EQ("1970-01", Format(month)); + month += kIntMin; + EXPECT_EQ("-178955001-05", Format(month)); + month -= kIntMin; + EXPECT_EQ("1970-01", Format(month)); + + civil_year year(0); + year += kIntMax; + EXPECT_EQ("2147483647", Format(year)); + year -= kIntMax; + EXPECT_EQ("0", Format(year)); + year += kIntMin; + EXPECT_EQ("-2147483648", Format(year)); + year -= kIntMin; + EXPECT_EQ("0", Format(year)); +} + +TEST(CivilTime, ArithmeticDifference) { + civil_second second(2015, 1, 2, 3, 4, 5); + EXPECT_EQ(0, second - second); + EXPECT_EQ(10, (second + 10) - second); + EXPECT_EQ(-10, (second - 10) - second); + + civil_minute minute(2015, 1, 2, 3, 4); + EXPECT_EQ(0, minute - minute); + EXPECT_EQ(10, (minute + 10) - minute); + EXPECT_EQ(-10, (minute - 10) - minute); + + civil_hour hour(2015, 1, 2, 3); + EXPECT_EQ(0, hour - hour); + EXPECT_EQ(10, (hour + 10) - hour); + EXPECT_EQ(-10, (hour - 10) - hour); + + civil_day day(2015, 1, 2); + EXPECT_EQ(0, day - day); + EXPECT_EQ(10, (day + 10) - day); + EXPECT_EQ(-10, (day - 10) - day); + + civil_month month(2015, 1); + EXPECT_EQ(0, month - month); + EXPECT_EQ(10, (month + 10) - month); + EXPECT_EQ(-10, (month - 10) - month); + + civil_year year(2015); + EXPECT_EQ(0, year - year); + EXPECT_EQ(10, (year + 10) - year); + EXPECT_EQ(-10, (year - 10) - year); +} + +TEST(CivilTime, DifferenceLimits) { + const int kIntMax = std::numeric_limits<int>::max(); + const int kIntMin = std::numeric_limits<int>::min(); + + // Check day arithmetic at the end of the year range. + const civil_day max_day(kIntMax, 12, 31); + EXPECT_EQ(1, max_day - (max_day - 1)); + EXPECT_EQ(-1, (max_day - 1) - max_day); + + // Check day arithmetic at the end of the year range. + const civil_day min_day(kIntMin, 1, 1); + EXPECT_EQ(1, (min_day + 1) - min_day); + EXPECT_EQ(-1, min_day - (min_day + 1)); + + // Check the limits of the return value. + const civil_day d1(1970, 1, 1); + const civil_day d2(5881580, 7, 11); + EXPECT_EQ(kIntMax, d2 - d1); + EXPECT_EQ(kIntMin, d1 - (d2 + 1)); +} + +TEST(CivilTime, Properties) { + civil_second ss(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, ss.year()); + EXPECT_EQ(2, ss.month()); + EXPECT_EQ(3, ss.day()); + EXPECT_EQ(4, ss.hour()); + EXPECT_EQ(5, ss.minute()); + EXPECT_EQ(6, ss.second()); + EXPECT_EQ(weekday::tuesday, get_weekday(ss)); + EXPECT_EQ(34, get_yearday(ss)); + + civil_minute mm(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, mm.year()); + EXPECT_EQ(2, mm.month()); + EXPECT_EQ(3, mm.day()); + EXPECT_EQ(4, mm.hour()); + EXPECT_EQ(5, mm.minute()); + EXPECT_EQ(0, mm.second()); + EXPECT_EQ(weekday::tuesday, get_weekday(mm)); + EXPECT_EQ(34, get_yearday(mm)); + + civil_hour hh(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, hh.year()); + EXPECT_EQ(2, hh.month()); + EXPECT_EQ(3, hh.day()); + EXPECT_EQ(4, hh.hour()); + EXPECT_EQ(0, hh.minute()); + EXPECT_EQ(0, hh.second()); + EXPECT_EQ(weekday::tuesday, get_weekday(hh)); + EXPECT_EQ(34, get_yearday(hh)); + + civil_day d(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, d.year()); + EXPECT_EQ(2, d.month()); + EXPECT_EQ(3, d.day()); + EXPECT_EQ(0, d.hour()); + EXPECT_EQ(0, d.minute()); + EXPECT_EQ(0, d.second()); + EXPECT_EQ(weekday::tuesday, get_weekday(d)); + EXPECT_EQ(34, get_yearday(d)); + + civil_month m(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, m.year()); + EXPECT_EQ(2, m.month()); + EXPECT_EQ(1, m.day()); + EXPECT_EQ(0, m.hour()); + EXPECT_EQ(0, m.minute()); + EXPECT_EQ(0, m.second()); + EXPECT_EQ(weekday::sunday, get_weekday(m)); + EXPECT_EQ(32, get_yearday(m)); + + civil_year y(2015, 2, 3, 4, 5, 6); + EXPECT_EQ(2015, y.year()); + EXPECT_EQ(1, y.month()); + EXPECT_EQ(1, y.day()); + EXPECT_EQ(0, y.hour()); + EXPECT_EQ(0, y.minute()); + EXPECT_EQ(0, y.second()); + EXPECT_EQ(weekday::thursday, get_weekday(y)); + EXPECT_EQ(1, get_yearday(y)); +} + +TEST(CivilTime, OutputStream) { + // Tests formatting of civil_year, which does not pad. + EXPECT_EQ("2016", Format(civil_year(2016))); + EXPECT_EQ("123", Format(civil_year(123))); + EXPECT_EQ("0", Format(civil_year(0))); + EXPECT_EQ("-1", Format(civil_year(-1))); + + // Tests formatting of sub-year types, which pad to 2 digits + EXPECT_EQ("2016-02", Format(civil_month(2016, 2))); + EXPECT_EQ("2016-02-03", Format(civil_day(2016, 2, 3))); + EXPECT_EQ("2016-02-03T04", Format(civil_hour(2016, 2, 3, 4))); + EXPECT_EQ("2016-02-03T04:05", Format(civil_minute(2016, 2, 3, 4, 5))); + EXPECT_EQ("2016-02-03T04:05:06", Format(civil_second(2016, 2, 3, 4, 5, 6))); + + // Tests formatting of weekday. + EXPECT_EQ("Monday", Format(weekday::monday)); + EXPECT_EQ("Tuesday", Format(weekday::tuesday)); + EXPECT_EQ("Wednesday", Format(weekday::wednesday)); + EXPECT_EQ("Thursday", Format(weekday::thursday)); + EXPECT_EQ("Friday", Format(weekday::friday)); + EXPECT_EQ("Saturday", Format(weekday::saturday)); + EXPECT_EQ("Sunday", Format(weekday::sunday)); +} + +TEST(CivilTime, OutputStreamLeftFillWidth) { + civil_second cs(2016, 2, 3, 4, 5, 6); + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << civil_year(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016.................X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << civil_month(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02..............X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << civil_day(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02-03...........X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << civil_hour(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02-03T04........X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << civil_minute(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02-03T04:05.....X..", ss.str()); + } + { + std::stringstream ss; + ss << std::left << std::setfill('.'); + ss << std::setw(3) << 'X'; + ss << std::setw(21) << civil_second(cs); + ss << std::setw(3) << 'X'; + EXPECT_EQ("X..2016-02-03T04:05:06..X..", ss.str()); + } +} + +TEST(CivilTime, NextPrevWeekday) { + // Jan 1, 1970 was a Thursday. + const civil_day thursday(1970, 1, 1); + EXPECT_EQ(weekday::thursday, get_weekday(thursday)); + + // Thursday -> Thursday + civil_day d = next_weekday(thursday, weekday::thursday); + EXPECT_EQ(7, d - thursday) << Format(d); + EXPECT_EQ(d - 14, prev_weekday(thursday, weekday::thursday)); + + // Thursday -> Friday + d = next_weekday(thursday, weekday::friday); + EXPECT_EQ(1, d - thursday) << Format(d); + EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::friday)); + + // Thursday -> Saturday + d = next_weekday(thursday, weekday::saturday); + EXPECT_EQ(2, d - thursday) << Format(d); + EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::saturday)); + + // Thursday -> Sunday + d = next_weekday(thursday, weekday::sunday); + EXPECT_EQ(3, d - thursday) << Format(d); + EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::sunday)); + + // Thursday -> Monday + d = next_weekday(thursday, weekday::monday); + EXPECT_EQ(4, d - thursday) << Format(d); + EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::monday)); + + // Thursday -> Tuesday + d = next_weekday(thursday, weekday::tuesday); + EXPECT_EQ(5, d - thursday) << Format(d); + EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::tuesday)); + + // Thursday -> Wednesday + d = next_weekday(thursday, weekday::wednesday); + EXPECT_EQ(6, d - thursday) << Format(d); + EXPECT_EQ(d - 7, prev_weekday(thursday, weekday::wednesday)); +} + +TEST(CivilTime, NormalizeWithHugeYear) { + civil_month c(9223372036854775807, 1); + EXPECT_EQ("9223372036854775807-01", Format(c)); + c = c - 1; // Causes normalization + EXPECT_EQ("9223372036854775806-12", Format(c)); + + c = civil_month(-9223372036854775807 - 1, 1); + EXPECT_EQ("-9223372036854775808-01", Format(c)); + c = c + 12; // Causes normalization + EXPECT_EQ("-9223372036854775807-01", Format(c)); +} + +TEST(CivilTime, LeapYears) { + // Test data for leap years. + const struct { + int year; + int days; + struct { + int month; + int day; + } leap_day; // The date of the day after Feb 28. + } kLeapYearTable[]{ + {1900, 365, {3, 1}}, {1999, 365, {3, 1}}, + {2000, 366, {2, 29}}, // leap year + {2001, 365, {3, 1}}, {2002, 365, {3, 1}}, + {2003, 365, {3, 1}}, {2004, 366, {2, 29}}, // leap year + {2005, 365, {3, 1}}, {2006, 365, {3, 1}}, + {2007, 365, {3, 1}}, {2008, 366, {2, 29}}, // leap year + {2009, 365, {3, 1}}, {2100, 365, {3, 1}}, + }; + + for (const auto& e : kLeapYearTable) { + // Tests incrementing through the leap day. + const civil_day feb28(e.year, 2, 28); + const civil_day next_day = feb28 + 1; + EXPECT_EQ(e.leap_day.month, next_day.month()); + EXPECT_EQ(e.leap_day.day, next_day.day()); + + // Tests difference in days of leap years. + const civil_year year(feb28); + const civil_year next_year = year + 1; + EXPECT_EQ(e.days, civil_day(next_year) - civil_day(year)); + } +} + +TEST(CivilTime, FirstThursdayInMonth) { + const civil_day nov1(2014, 11, 1); + const civil_day thursday = next_weekday(nov1 - 1, weekday::thursday); + EXPECT_EQ("2014-11-06", Format(thursday)); + + // Bonus: Date of Thanksgiving in the United States + // Rule: Fourth Thursday of November + const civil_day thanksgiving = thursday + 7 * 3; + EXPECT_EQ("2014-11-27", Format(thanksgiving)); +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_fixed.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_fixed.cc new file mode 100644 index 0000000000..303c0244a8 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_fixed.cc @@ -0,0 +1,140 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "time_zone_fixed.h" + +#include <algorithm> +#include <cassert> +#include <chrono> +#include <cstring> +#include <string> + +#include "absl/base/config.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +namespace { + +// The prefix used for the internal names of fixed-offset zones. +const char kFixedZonePrefix[] = "Fixed/UTC"; + +const char kDigits[] = "0123456789"; + +char* Format02d(char* p, int v) { + *p++ = kDigits[(v / 10) % 10]; + *p++ = kDigits[v % 10]; + return p; +} + +int Parse02d(const char* p) { + if (const char* ap = std::strchr(kDigits, *p)) { + int v = static_cast<int>(ap - kDigits); + if (const char* bp = std::strchr(kDigits, *++p)) { + return (v * 10) + static_cast<int>(bp - kDigits); + } + } + return -1; +} + +} // namespace + +bool FixedOffsetFromName(const std::string& name, seconds* offset) { + if (name.compare(0, std::string::npos, "UTC", 3) == 0) { + *offset = seconds::zero(); + return true; + } + + const std::size_t prefix_len = sizeof(kFixedZonePrefix) - 1; + const char* const ep = kFixedZonePrefix + prefix_len; + if (name.size() != prefix_len + 9) // <prefix>+99:99:99 + return false; + if (!std::equal(kFixedZonePrefix, ep, name.begin())) return false; + const char* np = name.data() + prefix_len; + if (np[0] != '+' && np[0] != '-') return false; + if (np[3] != ':' || np[6] != ':') // see note below about large offsets + return false; + + int hours = Parse02d(np + 1); + if (hours == -1) return false; + int mins = Parse02d(np + 4); + if (mins == -1) return false; + int secs = Parse02d(np + 7); + if (secs == -1) return false; + + secs += ((hours * 60) + mins) * 60; + if (secs > 24 * 60 * 60) return false; // outside supported offset range + *offset = seconds(secs * (np[0] == '-' ? -1 : 1)); // "-" means west + return true; +} + +std::string FixedOffsetToName(const seconds& offset) { + if (offset == seconds::zero()) return "UTC"; + if (offset < std::chrono::hours(-24) || offset > std::chrono::hours(24)) { + // We don't support fixed-offset zones more than 24 hours + // away from UTC to avoid complications in rendering such + // offsets and to (somewhat) limit the total number of zones. + return "UTC"; + } + int offset_seconds = static_cast<int>(offset.count()); + const char sign = (offset_seconds < 0 ? '-' : '+'); + int offset_minutes = offset_seconds / 60; + offset_seconds %= 60; + if (sign == '-') { + if (offset_seconds > 0) { + offset_seconds -= 60; + offset_minutes += 1; + } + offset_seconds = -offset_seconds; + offset_minutes = -offset_minutes; + } + int offset_hours = offset_minutes / 60; + offset_minutes %= 60; + const std::size_t prefix_len = sizeof(kFixedZonePrefix) - 1; + char buf[prefix_len + sizeof("-24:00:00")]; + char* ep = std::copy(kFixedZonePrefix, kFixedZonePrefix + prefix_len, buf); + *ep++ = sign; + ep = Format02d(ep, offset_hours); + *ep++ = ':'; + ep = Format02d(ep, offset_minutes); + *ep++ = ':'; + ep = Format02d(ep, offset_seconds); + *ep++ = '\0'; + assert(ep == buf + sizeof(buf)); + return buf; +} + +std::string FixedOffsetToAbbr(const seconds& offset) { + std::string abbr = FixedOffsetToName(offset); + const std::size_t prefix_len = sizeof(kFixedZonePrefix) - 1; + if (abbr.size() == prefix_len + 9) { // <prefix>+99:99:99 + abbr.erase(0, prefix_len); // +99:99:99 + abbr.erase(6, 1); // +99:9999 + abbr.erase(3, 1); // +999999 + if (abbr[5] == '0' && abbr[6] == '0') { // +999900 + abbr.erase(5, 2); // +9999 + if (abbr[3] == '0' && abbr[4] == '0') { // +9900 + abbr.erase(3, 2); // +99 + } + } + } + return abbr; +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_fixed.h b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_fixed.h new file mode 100644 index 0000000000..e74a0bbd9d --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_fixed.h @@ -0,0 +1,52 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_FIXED_H_ +#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_FIXED_H_ + +#include <string> + +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +// Helper functions for dealing with the names and abbreviations +// of time zones that are a fixed offset (seconds east) from UTC. +// FixedOffsetFromName() extracts the offset from a valid fixed-offset +// name, while FixedOffsetToName() and FixedOffsetToAbbr() generate +// the canonical zone name and abbreviation respectively for the given +// offset. +// +// A fixed-offset name looks like "Fixed/UTC<+-><hours>:<mins>:<secs>". +// Its abbreviation is of the form "UTC(<+->H?H(MM(SS)?)?)?" where the +// optional pieces are omitted when their values are zero. (Note that +// the sign is the opposite of that used in a POSIX TZ specification.) +// +// Note: FixedOffsetFromName() fails on syntax errors or when the parsed +// offset exceeds 24 hours. FixedOffsetToName() and FixedOffsetToAbbr() +// both produce "UTC" when the argument offset exceeds 24 hours. +bool FixedOffsetFromName(const std::string& name, seconds* offset); +std::string FixedOffsetToName(const seconds& offset); +std::string FixedOffsetToAbbr(const seconds& offset); + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_FIXED_H_ diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format.cc new file mode 100644 index 0000000000..950b23a1d2 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format.cc @@ -0,0 +1,922 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#if !defined(HAS_STRPTIME) +#if !defined(_MSC_VER) && !defined(__MINGW32__) +#define HAS_STRPTIME 1 // assume everyone has strptime() except windows +#endif +#endif + +#if defined(HAS_STRPTIME) && HAS_STRPTIME +#if !defined(_XOPEN_SOURCE) +#define _XOPEN_SOURCE // Definedness suffices for strptime. +#endif +#endif + +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" + +// Include time.h directly since, by C++ standards, ctime doesn't have to +// declare strptime. +#include <time.h> + +#include <cctype> +#include <chrono> +#include <cstddef> +#include <cstdint> +#include <cstring> +#include <ctime> +#include <limits> +#include <string> +#include <vector> +#if !HAS_STRPTIME +#include <iomanip> +#include <sstream> +#endif + +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "time_zone_if.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { +namespace detail { + +namespace { + +#if !HAS_STRPTIME +// Build a strptime() using C++11's std::get_time(). +char* strptime(const char* s, const char* fmt, std::tm* tm) { + std::istringstream input(s); + input >> std::get_time(tm, fmt); + if (input.fail()) return nullptr; + return const_cast<char*>(s) + + (input.eof() ? strlen(s) : static_cast<std::size_t>(input.tellg())); +} +#endif + +std::tm ToTM(const time_zone::absolute_lookup& al) { + std::tm tm{}; + tm.tm_sec = al.cs.second(); + tm.tm_min = al.cs.minute(); + tm.tm_hour = al.cs.hour(); + tm.tm_mday = al.cs.day(); + tm.tm_mon = al.cs.month() - 1; + + // Saturate tm.tm_year is cases of over/underflow. + if (al.cs.year() < std::numeric_limits<int>::min() + 1900) { + tm.tm_year = std::numeric_limits<int>::min(); + } else if (al.cs.year() - 1900 > std::numeric_limits<int>::max()) { + tm.tm_year = std::numeric_limits<int>::max(); + } else { + tm.tm_year = static_cast<int>(al.cs.year() - 1900); + } + + switch (get_weekday(al.cs)) { + case weekday::sunday: + tm.tm_wday = 0; + break; + case weekday::monday: + tm.tm_wday = 1; + break; + case weekday::tuesday: + tm.tm_wday = 2; + break; + case weekday::wednesday: + tm.tm_wday = 3; + break; + case weekday::thursday: + tm.tm_wday = 4; + break; + case weekday::friday: + tm.tm_wday = 5; + break; + case weekday::saturday: + tm.tm_wday = 6; + break; + } + tm.tm_yday = get_yearday(al.cs) - 1; + tm.tm_isdst = al.is_dst ? 1 : 0; + return tm; +} + +const char kDigits[] = "0123456789"; + +// Formats a 64-bit integer in the given field width. Note that it is up +// to the caller of Format64() [and Format02d()/FormatOffset()] to ensure +// that there is sufficient space before ep to hold the conversion. +char* Format64(char* ep, int width, std::int_fast64_t v) { + bool neg = false; + if (v < 0) { + --width; + neg = true; + if (v == std::numeric_limits<std::int_fast64_t>::min()) { + // Avoid negating minimum value. + std::int_fast64_t last_digit = -(v % 10); + v /= 10; + if (last_digit < 0) { + ++v; + last_digit += 10; + } + --width; + *--ep = kDigits[last_digit]; + } + v = -v; + } + do { + --width; + *--ep = kDigits[v % 10]; + } while (v /= 10); + while (--width >= 0) *--ep = '0'; // zero pad + if (neg) *--ep = '-'; + return ep; +} + +// Formats [0 .. 99] as %02d. +char* Format02d(char* ep, int v) { + *--ep = kDigits[v % 10]; + *--ep = kDigits[(v / 10) % 10]; + return ep; +} + +// Formats a UTC offset, like +00:00. +char* FormatOffset(char* ep, int offset, const char* mode) { + // TODO: Follow the RFC3339 "Unknown Local Offset Convention" and + // generate a "negative zero" when we're formatting a zero offset + // as the result of a failed load_time_zone(). + char sign = '+'; + if (offset < 0) { + offset = -offset; // bounded by 24h so no overflow + sign = '-'; + } + const int seconds = offset % 60; + const int minutes = (offset /= 60) % 60; + const int hours = offset /= 60; + const char sep = mode[0]; + const bool ext = (sep != '\0' && mode[1] == '*'); + const bool ccc = (ext && mode[2] == ':'); + if (ext && (!ccc || seconds != 0)) { + ep = Format02d(ep, seconds); + *--ep = sep; + } else { + // If we're not rendering seconds, sub-minute negative offsets + // should get a positive sign (e.g., offset=-10s => "+00:00"). + if (hours == 0 && minutes == 0) sign = '+'; + } + if (!ccc || minutes != 0 || seconds != 0) { + ep = Format02d(ep, minutes); + if (sep != '\0') *--ep = sep; + } + ep = Format02d(ep, hours); + *--ep = sign; + return ep; +} + +// Formats a std::tm using strftime(3). +void FormatTM(std::string* out, const std::string& fmt, const std::tm& tm) { + // strftime(3) returns the number of characters placed in the output + // array (which may be 0 characters). It also returns 0 to indicate + // an error, like the array wasn't large enough. To accommodate this, + // the following code grows the buffer size from 2x the format std::string + // length up to 32x. + for (std::size_t i = 2; i != 32; i *= 2) { + std::size_t buf_size = fmt.size() * i; + std::vector<char> buf(buf_size); + if (std::size_t len = strftime(&buf[0], buf_size, fmt.c_str(), &tm)) { + out->append(&buf[0], len); + return; + } + } +} + +// Used for %E#S/%E#f specifiers and for data values in parse(). +template <typename T> +const char* ParseInt(const char* dp, int width, T min, T max, T* vp) { + if (dp != nullptr) { + const T kmin = std::numeric_limits<T>::min(); + bool erange = false; + bool neg = false; + T value = 0; + if (*dp == '-') { + neg = true; + if (width <= 0 || --width != 0) { + ++dp; + } else { + dp = nullptr; // width was 1 + } + } + if (const char* const bp = dp) { + while (const char* cp = strchr(kDigits, *dp)) { + int d = static_cast<int>(cp - kDigits); + if (d >= 10) break; + if (value < kmin / 10) { + erange = true; + break; + } + value *= 10; + if (value < kmin + d) { + erange = true; + break; + } + value -= d; + dp += 1; + if (width > 0 && --width == 0) break; + } + if (dp != bp && !erange && (neg || value != kmin)) { + if (!neg || value != 0) { + if (!neg) value = -value; // make positive + if (min <= value && value <= max) { + *vp = value; + } else { + dp = nullptr; + } + } else { + dp = nullptr; + } + } else { + dp = nullptr; + } + } + } + return dp; +} + +// The number of base-10 digits that can be represented by a signed 64-bit +// integer. That is, 10^kDigits10_64 <= 2^63 - 1 < 10^(kDigits10_64 + 1). +const int kDigits10_64 = 18; + +// 10^n for everything that can be represented by a signed 64-bit integer. +const std::int_fast64_t kExp10[kDigits10_64 + 1] = { + 1, + 10, + 100, + 1000, + 10000, + 100000, + 1000000, + 10000000, + 100000000, + 1000000000, + 10000000000, + 100000000000, + 1000000000000, + 10000000000000, + 100000000000000, + 1000000000000000, + 10000000000000000, + 100000000000000000, + 1000000000000000000, +}; + +} // namespace + +// Uses strftime(3) to format the given Time. The following extended format +// specifiers are also supported: +// +// - %Ez - RFC3339-compatible numeric UTC offset (+hh:mm or -hh:mm) +// - %E*z - Full-resolution numeric UTC offset (+hh:mm:ss or -hh:mm:ss) +// - %E#S - Seconds with # digits of fractional precision +// - %E*S - Seconds with full fractional precision (a literal '*') +// - %E4Y - Four-character years (-999 ... -001, 0000, 0001 ... 9999) +// +// The standard specifiers from RFC3339_* (%Y, %m, %d, %H, %M, and %S) are +// handled internally for performance reasons. strftime(3) is slow due to +// a POSIX requirement to respect changes to ${TZ}. +// +// The TZ/GNU %s extension is handled internally because strftime() has +// to use mktime() to generate it, and that assumes the local time zone. +// +// We also handle the %z and %Z specifiers to accommodate platforms that do +// not support the tm_gmtoff and tm_zone extensions to std::tm. +// +// Requires that zero() <= fs < seconds(1). +std::string format(const std::string& format, const time_point<seconds>& tp, + const detail::femtoseconds& fs, const time_zone& tz) { + std::string result; + result.reserve(format.size()); // A reasonable guess for the result size. + const time_zone::absolute_lookup al = tz.lookup(tp); + const std::tm tm = ToTM(al); + + // Scratch buffer for internal conversions. + char buf[3 + kDigits10_64]; // enough for longest conversion + char* const ep = buf + sizeof(buf); + char* bp; // works back from ep + + // Maintain three, disjoint subsequences that span format. + // [format.begin() ... pending) : already formatted into result + // [pending ... cur) : formatting pending, but no special cases + // [cur ... format.end()) : unexamined + // Initially, everything is in the unexamined part. + const char* pending = format.c_str(); // NUL terminated + const char* cur = pending; + const char* end = pending + format.length(); + + while (cur != end) { // while something is unexamined + // Moves cur to the next percent sign. + const char* start = cur; + while (cur != end && *cur != '%') ++cur; + + // If the new pending text is all ordinary, copy it out. + if (cur != start && pending == start) { + result.append(pending, static_cast<std::size_t>(cur - pending)); + pending = start = cur; + } + + // Span the sequential percent signs. + const char* percent = cur; + while (cur != end && *cur == '%') ++cur; + + // If the new pending text is all percents, copy out one + // percent for every matched pair, then skip those pairs. + if (cur != start && pending == start) { + std::size_t escaped = static_cast<std::size_t>(cur - pending) / 2; + result.append(pending, escaped); + pending += escaped * 2; + // Also copy out a single trailing percent. + if (pending != cur && cur == end) { + result.push_back(*pending++); + } + } + + // Loop unless we have an unescaped percent. + if (cur == end || (cur - percent) % 2 == 0) continue; + + // Simple specifiers that we handle ourselves. + if (strchr("YmdeHMSzZs%", *cur)) { + if (cur - 1 != pending) { + FormatTM(&result, std::string(pending, cur - 1), tm); + } + switch (*cur) { + case 'Y': + // This avoids the tm.tm_year overflow problem for %Y, however + // tm.tm_year will still be used by other specifiers like %D. + bp = Format64(ep, 0, al.cs.year()); + result.append(bp, static_cast<std::size_t>(ep - bp)); + break; + case 'm': + bp = Format02d(ep, al.cs.month()); + result.append(bp, static_cast<std::size_t>(ep - bp)); + break; + case 'd': + case 'e': + bp = Format02d(ep, al.cs.day()); + if (*cur == 'e' && *bp == '0') *bp = ' '; // for Windows + result.append(bp, static_cast<std::size_t>(ep - bp)); + break; + case 'H': + bp = Format02d(ep, al.cs.hour()); + result.append(bp, static_cast<std::size_t>(ep - bp)); + break; + case 'M': + bp = Format02d(ep, al.cs.minute()); + result.append(bp, static_cast<std::size_t>(ep - bp)); + break; + case 'S': + bp = Format02d(ep, al.cs.second()); + result.append(bp, static_cast<std::size_t>(ep - bp)); + break; + case 'z': + bp = FormatOffset(ep, al.offset, ""); + result.append(bp, static_cast<std::size_t>(ep - bp)); + break; + case 'Z': + result.append(al.abbr); + break; + case 's': + bp = Format64(ep, 0, ToUnixSeconds(tp)); + result.append(bp, static_cast<std::size_t>(ep - bp)); + break; + case '%': + result.push_back('%'); + break; + } + pending = ++cur; + continue; + } + + // More complex specifiers that we handle ourselves. + if (*cur == ':' && cur + 1 != end) { + if (*(cur + 1) == 'z') { + // Formats %:z. + if (cur - 1 != pending) { + FormatTM(&result, std::string(pending, cur - 1), tm); + } + bp = FormatOffset(ep, al.offset, ":"); + result.append(bp, static_cast<std::size_t>(ep - bp)); + pending = cur += 2; + continue; + } + if (*(cur + 1) == ':' && cur + 2 != end) { + if (*(cur + 2) == 'z') { + // Formats %::z. + if (cur - 1 != pending) { + FormatTM(&result, std::string(pending, cur - 1), tm); + } + bp = FormatOffset(ep, al.offset, ":*"); + result.append(bp, static_cast<std::size_t>(ep - bp)); + pending = cur += 3; + continue; + } + if (*(cur + 2) == ':' && cur + 3 != end) { + if (*(cur + 3) == 'z') { + // Formats %:::z. + if (cur - 1 != pending) { + FormatTM(&result, std::string(pending, cur - 1), tm); + } + bp = FormatOffset(ep, al.offset, ":*:"); + result.append(bp, static_cast<std::size_t>(ep - bp)); + pending = cur += 4; + continue; + } + } + } + } + + // Loop if there is no E modifier. + if (*cur != 'E' || ++cur == end) continue; + + // Format our extensions. + if (*cur == 'z') { + // Formats %Ez. + if (cur - 2 != pending) { + FormatTM(&result, std::string(pending, cur - 2), tm); + } + bp = FormatOffset(ep, al.offset, ":"); + result.append(bp, static_cast<std::size_t>(ep - bp)); + pending = ++cur; + } else if (*cur == '*' && cur + 1 != end && *(cur + 1) == 'z') { + // Formats %E*z. + if (cur - 2 != pending) { + FormatTM(&result, std::string(pending, cur - 2), tm); + } + bp = FormatOffset(ep, al.offset, ":*"); + result.append(bp, static_cast<std::size_t>(ep - bp)); + pending = cur += 2; + } else if (*cur == '*' && cur + 1 != end && + (*(cur + 1) == 'S' || *(cur + 1) == 'f')) { + // Formats %E*S or %E*F. + if (cur - 2 != pending) { + FormatTM(&result, std::string(pending, cur - 2), tm); + } + char* cp = ep; + bp = Format64(cp, 15, fs.count()); + while (cp != bp && cp[-1] == '0') --cp; + switch (*(cur + 1)) { + case 'S': + if (cp != bp) *--bp = '.'; + bp = Format02d(bp, al.cs.second()); + break; + case 'f': + if (cp == bp) *--bp = '0'; + break; + } + result.append(bp, static_cast<std::size_t>(cp - bp)); + pending = cur += 2; + } else if (*cur == '4' && cur + 1 != end && *(cur + 1) == 'Y') { + // Formats %E4Y. + if (cur - 2 != pending) { + FormatTM(&result, std::string(pending, cur - 2), tm); + } + bp = Format64(ep, 4, al.cs.year()); + result.append(bp, static_cast<std::size_t>(ep - bp)); + pending = cur += 2; + } else if (std::isdigit(*cur)) { + // Possibly found %E#S or %E#f. + int n = 0; + if (const char* np = ParseInt(cur, 0, 0, 1024, &n)) { + if (*np == 'S' || *np == 'f') { + // Formats %E#S or %E#f. + if (cur - 2 != pending) { + FormatTM(&result, std::string(pending, cur - 2), tm); + } + bp = ep; + if (n > 0) { + if (n > kDigits10_64) n = kDigits10_64; + bp = Format64(bp, n, + (n > 15) ? fs.count() * kExp10[n - 15] + : fs.count() / kExp10[15 - n]); + if (*np == 'S') *--bp = '.'; + } + if (*np == 'S') bp = Format02d(bp, al.cs.second()); + result.append(bp, static_cast<std::size_t>(ep - bp)); + pending = cur = ++np; + } + } + } + } + + // Formats any remaining data. + if (end != pending) { + FormatTM(&result, std::string(pending, end), tm); + } + + return result; +} + +namespace { + +const char* ParseOffset(const char* dp, const char* mode, int* offset) { + if (dp != nullptr) { + const char first = *dp++; + if (first == '+' || first == '-') { + char sep = mode[0]; + int hours = 0; + int minutes = 0; + int seconds = 0; + const char* ap = ParseInt(dp, 2, 0, 23, &hours); + if (ap != nullptr && ap - dp == 2) { + dp = ap; + if (sep != '\0' && *ap == sep) ++ap; + const char* bp = ParseInt(ap, 2, 0, 59, &minutes); + if (bp != nullptr && bp - ap == 2) { + dp = bp; + if (sep != '\0' && *bp == sep) ++bp; + const char* cp = ParseInt(bp, 2, 0, 59, &seconds); + if (cp != nullptr && cp - bp == 2) dp = cp; + } + *offset = ((hours * 60 + minutes) * 60) + seconds; + if (first == '-') *offset = -*offset; + } else { + dp = nullptr; + } + } else if (first == 'Z') { // Zulu + *offset = 0; + } else { + dp = nullptr; + } + } + return dp; +} + +const char* ParseZone(const char* dp, std::string* zone) { + zone->clear(); + if (dp != nullptr) { + while (*dp != '\0' && !std::isspace(*dp)) zone->push_back(*dp++); + if (zone->empty()) dp = nullptr; + } + return dp; +} + +const char* ParseSubSeconds(const char* dp, detail::femtoseconds* subseconds) { + if (dp != nullptr) { + std::int_fast64_t v = 0; + std::int_fast64_t exp = 0; + const char* const bp = dp; + while (const char* cp = strchr(kDigits, *dp)) { + int d = static_cast<int>(cp - kDigits); + if (d >= 10) break; + if (exp < 15) { + exp += 1; + v *= 10; + v += d; + } + ++dp; + } + if (dp != bp) { + v *= kExp10[15 - exp]; + *subseconds = detail::femtoseconds(v); + } else { + dp = nullptr; + } + } + return dp; +} + +// Parses a string into a std::tm using strptime(3). +const char* ParseTM(const char* dp, const char* fmt, std::tm* tm) { + if (dp != nullptr) { + dp = strptime(dp, fmt, tm); + } + return dp; +} + +} // namespace + +// Uses strptime(3) to parse the given input. Supports the same extended +// format specifiers as format(), although %E#S and %E*S are treated +// identically (and similarly for %E#f and %E*f). %Ez and %E*z also accept +// the same inputs. +// +// The standard specifiers from RFC3339_* (%Y, %m, %d, %H, %M, and %S) are +// handled internally so that we can normally avoid strptime() altogether +// (which is particularly helpful when the native implementation is broken). +// +// The TZ/GNU %s extension is handled internally because strptime() has to +// use localtime_r() to generate it, and that assumes the local time zone. +// +// We also handle the %z specifier to accommodate platforms that do not +// support the tm_gmtoff extension to std::tm. %Z is parsed but ignored. +bool parse(const std::string& format, const std::string& input, + const time_zone& tz, time_point<seconds>* sec, + detail::femtoseconds* fs, std::string* err) { + // The unparsed input. + const char* data = input.c_str(); // NUL terminated + + // Skips leading whitespace. + while (std::isspace(*data)) ++data; + + const year_t kyearmax = std::numeric_limits<year_t>::max(); + const year_t kyearmin = std::numeric_limits<year_t>::min(); + + // Sets default values for unspecified fields. + bool saw_year = false; + year_t year = 1970; + std::tm tm{}; + tm.tm_year = 1970 - 1900; + tm.tm_mon = 1 - 1; // Jan + tm.tm_mday = 1; + tm.tm_hour = 0; + tm.tm_min = 0; + tm.tm_sec = 0; + tm.tm_wday = 4; // Thu + tm.tm_yday = 0; + tm.tm_isdst = 0; + auto subseconds = detail::femtoseconds::zero(); + bool saw_offset = false; + int offset = 0; // No offset from passed tz. + std::string zone = "UTC"; + + const char* fmt = format.c_str(); // NUL terminated + bool twelve_hour = false; + bool afternoon = false; + + bool saw_percent_s = false; + std::int_fast64_t percent_s = 0; + + // Steps through format, one specifier at a time. + while (data != nullptr && *fmt != '\0') { + if (std::isspace(*fmt)) { + while (std::isspace(*data)) ++data; + while (std::isspace(*++fmt)) continue; + continue; + } + + if (*fmt != '%') { + if (*data == *fmt) { + ++data; + ++fmt; + } else { + data = nullptr; + } + continue; + } + + const char* percent = fmt; + if (*++fmt == '\0') { + data = nullptr; + continue; + } + switch (*fmt++) { + case 'Y': + // Symmetrically with FormatTime(), directly handing %Y avoids the + // tm.tm_year overflow problem. However, tm.tm_year will still be + // used by other specifiers like %D. + data = ParseInt(data, 0, kyearmin, kyearmax, &year); + if (data != nullptr) saw_year = true; + continue; + case 'm': + data = ParseInt(data, 2, 1, 12, &tm.tm_mon); + if (data != nullptr) tm.tm_mon -= 1; + continue; + case 'd': + case 'e': + data = ParseInt(data, 2, 1, 31, &tm.tm_mday); + continue; + case 'H': + data = ParseInt(data, 2, 0, 23, &tm.tm_hour); + twelve_hour = false; + continue; + case 'M': + data = ParseInt(data, 2, 0, 59, &tm.tm_min); + continue; + case 'S': + data = ParseInt(data, 2, 0, 60, &tm.tm_sec); + continue; + case 'I': + case 'l': + case 'r': // probably uses %I + twelve_hour = true; + break; + case 'R': // uses %H + case 'T': // uses %H + case 'c': // probably uses %H + case 'X': // probably uses %H + twelve_hour = false; + break; + case 'z': + data = ParseOffset(data, "", &offset); + if (data != nullptr) saw_offset = true; + continue; + case 'Z': // ignored; zone abbreviations are ambiguous + data = ParseZone(data, &zone); + continue; + case 's': + data = + ParseInt(data, 0, std::numeric_limits<std::int_fast64_t>::min(), + std::numeric_limits<std::int_fast64_t>::max(), &percent_s); + if (data != nullptr) saw_percent_s = true; + continue; + case ':': + if (fmt[0] == 'z' || + (fmt[0] == ':' && + (fmt[1] == 'z' || (fmt[1] == ':' && fmt[2] == 'z')))) { + data = ParseOffset(data, ":", &offset); + if (data != nullptr) saw_offset = true; + fmt += (fmt[0] == 'z') ? 1 : (fmt[1] == 'z') ? 2 : 3; + continue; + } + break; + case '%': + data = (*data == '%' ? data + 1 : nullptr); + continue; + case 'E': + if (fmt[0] == 'z' || (fmt[0] == '*' && fmt[1] == 'z')) { + data = ParseOffset(data, ":", &offset); + if (data != nullptr) saw_offset = true; + fmt += (fmt[0] == 'z') ? 1 : 2; + continue; + } + if (fmt[0] == '*' && fmt[1] == 'S') { + data = ParseInt(data, 2, 0, 60, &tm.tm_sec); + if (data != nullptr && *data == '.') { + data = ParseSubSeconds(data + 1, &subseconds); + } + fmt += 2; + continue; + } + if (fmt[0] == '*' && fmt[1] == 'f') { + if (data != nullptr && std::isdigit(*data)) { + data = ParseSubSeconds(data, &subseconds); + } + fmt += 2; + continue; + } + if (fmt[0] == '4' && fmt[1] == 'Y') { + const char* bp = data; + data = ParseInt(data, 4, year_t{-999}, year_t{9999}, &year); + if (data != nullptr) { + if (data - bp == 4) { + saw_year = true; + } else { + data = nullptr; // stopped too soon + } + } + fmt += 2; + continue; + } + if (std::isdigit(*fmt)) { + int n = 0; // value ignored + if (const char* np = ParseInt(fmt, 0, 0, 1024, &n)) { + if (*np == 'S') { + data = ParseInt(data, 2, 0, 60, &tm.tm_sec); + if (data != nullptr && *data == '.') { + data = ParseSubSeconds(data + 1, &subseconds); + } + fmt = ++np; + continue; + } + if (*np == 'f') { + if (data != nullptr && std::isdigit(*data)) { + data = ParseSubSeconds(data, &subseconds); + } + fmt = ++np; + continue; + } + } + } + if (*fmt == 'c') twelve_hour = false; // probably uses %H + if (*fmt == 'X') twelve_hour = false; // probably uses %H + if (*fmt != '\0') ++fmt; + break; + case 'O': + if (*fmt == 'H') twelve_hour = false; + if (*fmt == 'I') twelve_hour = true; + if (*fmt != '\0') ++fmt; + break; + } + + // Parses the current specifier. + const char* orig_data = data; + std::string spec(percent, static_cast<std::size_t>(fmt - percent)); + data = ParseTM(data, spec.c_str(), &tm); + + // If we successfully parsed %p we need to remember whether the result + // was AM or PM so that we can adjust tm_hour before time_zone::lookup(). + // So reparse the input with a known AM hour, and check if it is shifted + // to a PM hour. + if (spec == "%p" && data != nullptr) { + std::string test_input = "1"; + test_input.append(orig_data, static_cast<std::size_t>(data - orig_data)); + const char* test_data = test_input.c_str(); + std::tm tmp{}; + ParseTM(test_data, "%I%p", &tmp); + afternoon = (tmp.tm_hour == 13); + } + } + + // Adjust a 12-hour tm_hour value if it should be in the afternoon. + if (twelve_hour && afternoon && tm.tm_hour < 12) { + tm.tm_hour += 12; + } + + if (data == nullptr) { + if (err != nullptr) *err = "Failed to parse input"; + return false; + } + + // Skip any remaining whitespace. + while (std::isspace(*data)) ++data; + + // parse() must consume the entire input std::string. + if (*data != '\0') { + if (err != nullptr) *err = "Illegal trailing data in input string"; + return false; + } + + // If we saw %s then we ignore anything else and return that time. + if (saw_percent_s) { + *sec = FromUnixSeconds(percent_s); + *fs = detail::femtoseconds::zero(); + return true; + } + + // If we saw %z, %Ez, or %E*z then we want to interpret the parsed fields + // in UTC and then shift by that offset. Otherwise we want to interpret + // the fields directly in the passed time_zone. + time_zone ptz = saw_offset ? utc_time_zone() : tz; + + // Allows a leap second of 60 to normalize forward to the following ":00". + if (tm.tm_sec == 60) { + tm.tm_sec -= 1; + offset -= 1; + subseconds = detail::femtoseconds::zero(); + } + + if (!saw_year) { + year = year_t{tm.tm_year}; + if (year > kyearmax - 1900) { + // Platform-dependent, maybe unreachable. + if (err != nullptr) *err = "Out-of-range year"; + return false; + } + year += 1900; + } + + const int month = tm.tm_mon + 1; + civil_second cs(year, month, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec); + + // parse() should not allow normalization. Due to the restricted field + // ranges above (see ParseInt()), the only possibility is for days to roll + // into months. That is, parsing "Sep 31" should not produce "Oct 1". + if (cs.month() != month || cs.day() != tm.tm_mday) { + if (err != nullptr) *err = "Out-of-range field"; + return false; + } + + // Accounts for the offset adjustment before converting to absolute time. + if ((offset < 0 && cs > civil_second::max() + offset) || + (offset > 0 && cs < civil_second::min() + offset)) { + if (err != nullptr) *err = "Out-of-range field"; + return false; + } + cs -= offset; + + const auto tp = ptz.lookup(cs).pre; + // Checks for overflow/underflow and returns an error as necessary. + if (tp == time_point<seconds>::max()) { + const auto al = ptz.lookup(time_point<seconds>::max()); + if (cs > al.cs) { + if (err != nullptr) *err = "Out-of-range field"; + return false; + } + } + if (tp == time_point<seconds>::min()) { + const auto al = ptz.lookup(time_point<seconds>::min()); + if (cs < al.cs) { + if (err != nullptr) *err = "Out-of-range field"; + return false; + } + } + + *sec = tp; + *fs = subseconds; + return true; +} + +} // namespace detail +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format_test.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format_test.cc new file mode 100644 index 0000000000..caebcc4d95 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_format_test.cc @@ -0,0 +1,1500 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include <chrono> +#include <iomanip> +#include <sstream> +#include <string> + +#include "gmock/gmock.h" +#include "gtest/gtest.h" +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" + +namespace chrono = std::chrono; + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +namespace { + +// This helper is a macro so that failed expectations show up with the +// correct line numbers. +#define ExpectTime(tp, tz, y, m, d, hh, mm, ss, off, isdst, zone) \ + do { \ + time_zone::absolute_lookup al = tz.lookup(tp); \ + EXPECT_EQ(y, al.cs.year()); \ + EXPECT_EQ(m, al.cs.month()); \ + EXPECT_EQ(d, al.cs.day()); \ + EXPECT_EQ(hh, al.cs.hour()); \ + EXPECT_EQ(mm, al.cs.minute()); \ + EXPECT_EQ(ss, al.cs.second()); \ + EXPECT_EQ(off, al.offset); \ + EXPECT_TRUE(isdst == al.is_dst); \ + EXPECT_STREQ(zone, al.abbr); \ + } while (0) + +const char RFC3339_full[] = "%Y-%m-%dT%H:%M:%E*S%Ez"; +const char RFC3339_sec[] = "%Y-%m-%dT%H:%M:%S%Ez"; + +const char RFC1123_full[] = "%a, %d %b %Y %H:%M:%S %z"; +const char RFC1123_no_wday[] = "%d %b %Y %H:%M:%S %z"; + +// A helper that tests the given format specifier by itself, and with leading +// and trailing characters. For example: TestFormatSpecifier(tp, "%a", "Thu"). +template <typename D> +void TestFormatSpecifier(time_point<D> tp, time_zone tz, const std::string& fmt, + const std::string& ans) { + EXPECT_EQ(ans, format(fmt, tp, tz)) << fmt; + EXPECT_EQ("xxx " + ans, format("xxx " + fmt, tp, tz)); + EXPECT_EQ(ans + " yyy", format(fmt + " yyy", tp, tz)); + EXPECT_EQ("xxx " + ans + " yyy", format("xxx " + fmt + " yyy", tp, tz)); +} + +} // namespace + +// +// Testing format() +// + +TEST(Format, TimePointResolution) { + const char kFmt[] = "%H:%M:%E*S"; + const time_zone utc = utc_time_zone(); + const time_point<chrono::nanoseconds> t0 = + chrono::system_clock::from_time_t(1420167845) + + chrono::milliseconds(123) + chrono::microseconds(456) + + chrono::nanoseconds(789); + EXPECT_EQ( + "03:04:05.123456789", + format(kFmt, chrono::time_point_cast<chrono::nanoseconds>(t0), utc)); + EXPECT_EQ( + "03:04:05.123456", + format(kFmt, chrono::time_point_cast<chrono::microseconds>(t0), utc)); + EXPECT_EQ( + "03:04:05.123", + format(kFmt, chrono::time_point_cast<chrono::milliseconds>(t0), utc)); + EXPECT_EQ("03:04:05", + format(kFmt, chrono::time_point_cast<chrono::seconds>(t0), utc)); + EXPECT_EQ( + "03:04:05", + format(kFmt, + chrono::time_point_cast<absl::time_internal::cctz::seconds>(t0), + utc)); + EXPECT_EQ("03:04:00", + format(kFmt, chrono::time_point_cast<chrono::minutes>(t0), utc)); + EXPECT_EQ("03:00:00", + format(kFmt, chrono::time_point_cast<chrono::hours>(t0), utc)); +} + +TEST(Format, TimePointExtendedResolution) { + const char kFmt[] = "%H:%M:%E*S"; + const time_zone utc = utc_time_zone(); + const time_point<absl::time_internal::cctz::seconds> tp = + chrono::time_point_cast<absl::time_internal::cctz::seconds>( + chrono::system_clock::from_time_t(0)) + + chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56); + + EXPECT_EQ( + "12:34:56.123456789012345", + detail::format(kFmt, tp, detail::femtoseconds(123456789012345), utc)); + EXPECT_EQ( + "12:34:56.012345678901234", + detail::format(kFmt, tp, detail::femtoseconds(12345678901234), utc)); + EXPECT_EQ("12:34:56.001234567890123", + detail::format(kFmt, tp, detail::femtoseconds(1234567890123), utc)); + EXPECT_EQ("12:34:56.000123456789012", + detail::format(kFmt, tp, detail::femtoseconds(123456789012), utc)); + + EXPECT_EQ("12:34:56.000000000000123", + detail::format(kFmt, tp, detail::femtoseconds(123), utc)); + EXPECT_EQ("12:34:56.000000000000012", + detail::format(kFmt, tp, detail::femtoseconds(12), utc)); + EXPECT_EQ("12:34:56.000000000000001", + detail::format(kFmt, tp, detail::femtoseconds(1), utc)); +} + +TEST(Format, Basics) { + time_zone tz = utc_time_zone(); + time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0); + + // Starts with a couple basic edge cases. + EXPECT_EQ("", format("", tp, tz)); + EXPECT_EQ(" ", format(" ", tp, tz)); + EXPECT_EQ(" ", format(" ", tp, tz)); + EXPECT_EQ("xxx", format("xxx", tp, tz)); + std::string big(128, 'x'); + EXPECT_EQ(big, format(big, tp, tz)); + // Cause the 1024-byte buffer to grow. + std::string bigger(100000, 'x'); + EXPECT_EQ(bigger, format(bigger, tp, tz)); + + tp += chrono::hours(13) + chrono::minutes(4) + chrono::seconds(5); + tp += chrono::milliseconds(6) + chrono::microseconds(7) + + chrono::nanoseconds(8); + EXPECT_EQ("1970-01-01", format("%Y-%m-%d", tp, tz)); + EXPECT_EQ("13:04:05", format("%H:%M:%S", tp, tz)); + EXPECT_EQ("13:04:05.006", format("%H:%M:%E3S", tp, tz)); + EXPECT_EQ("13:04:05.006007", format("%H:%M:%E6S", tp, tz)); + EXPECT_EQ("13:04:05.006007008", format("%H:%M:%E9S", tp, tz)); +} + +TEST(Format, PosixConversions) { + const time_zone tz = utc_time_zone(); + auto tp = chrono::system_clock::from_time_t(0); + + TestFormatSpecifier(tp, tz, "%d", "01"); + TestFormatSpecifier(tp, tz, "%e", " 1"); // extension but internal support + TestFormatSpecifier(tp, tz, "%H", "00"); + TestFormatSpecifier(tp, tz, "%I", "12"); + TestFormatSpecifier(tp, tz, "%j", "001"); + TestFormatSpecifier(tp, tz, "%m", "01"); + TestFormatSpecifier(tp, tz, "%M", "00"); + TestFormatSpecifier(tp, tz, "%S", "00"); + TestFormatSpecifier(tp, tz, "%U", "00"); +#if !defined(__EMSCRIPTEN__) + TestFormatSpecifier(tp, tz, "%w", "4"); // 4=Thursday +#endif + TestFormatSpecifier(tp, tz, "%W", "00"); + TestFormatSpecifier(tp, tz, "%y", "70"); + TestFormatSpecifier(tp, tz, "%Y", "1970"); + TestFormatSpecifier(tp, tz, "%z", "+0000"); + TestFormatSpecifier(tp, tz, "%Z", "UTC"); + TestFormatSpecifier(tp, tz, "%%", "%"); + +#if defined(__linux__) + // SU/C99/TZ extensions + TestFormatSpecifier(tp, tz, "%C", "19"); + TestFormatSpecifier(tp, tz, "%D", "01/01/70"); + TestFormatSpecifier(tp, tz, "%F", "1970-01-01"); + TestFormatSpecifier(tp, tz, "%g", "70"); + TestFormatSpecifier(tp, tz, "%G", "1970"); + TestFormatSpecifier(tp, tz, "%k", " 0"); + TestFormatSpecifier(tp, tz, "%l", "12"); + TestFormatSpecifier(tp, tz, "%n", "\n"); + TestFormatSpecifier(tp, tz, "%R", "00:00"); + TestFormatSpecifier(tp, tz, "%t", "\t"); + TestFormatSpecifier(tp, tz, "%T", "00:00:00"); + TestFormatSpecifier(tp, tz, "%u", "4"); // 4=Thursday + TestFormatSpecifier(tp, tz, "%V", "01"); + TestFormatSpecifier(tp, tz, "%s", "0"); +#endif +} + +TEST(Format, LocaleSpecific) { + const time_zone tz = utc_time_zone(); + auto tp = chrono::system_clock::from_time_t(0); + + TestFormatSpecifier(tp, tz, "%a", "Thu"); + TestFormatSpecifier(tp, tz, "%A", "Thursday"); + TestFormatSpecifier(tp, tz, "%b", "Jan"); + TestFormatSpecifier(tp, tz, "%B", "January"); + + // %c should at least produce the numeric year and time-of-day. + const std::string s = format("%c", tp, utc_time_zone()); + EXPECT_THAT(s, testing::HasSubstr("1970")); + EXPECT_THAT(s, testing::HasSubstr("00:00:00")); + + TestFormatSpecifier(tp, tz, "%p", "AM"); + TestFormatSpecifier(tp, tz, "%x", "01/01/70"); + TestFormatSpecifier(tp, tz, "%X", "00:00:00"); + +#if defined(__linux__) + // SU/C99/TZ extensions + TestFormatSpecifier(tp, tz, "%h", "Jan"); // Same as %b + TestFormatSpecifier(tp, tz, "%P", "am"); + TestFormatSpecifier(tp, tz, "%r", "12:00:00 AM"); + + // Modified conversion specifiers %E_ + TestFormatSpecifier(tp, tz, "%Ec", "Thu Jan 1 00:00:00 1970"); + TestFormatSpecifier(tp, tz, "%EC", "19"); + TestFormatSpecifier(tp, tz, "%Ex", "01/01/70"); + TestFormatSpecifier(tp, tz, "%EX", "00:00:00"); + TestFormatSpecifier(tp, tz, "%Ey", "70"); + TestFormatSpecifier(tp, tz, "%EY", "1970"); + + // Modified conversion specifiers %O_ + TestFormatSpecifier(tp, tz, "%Od", "01"); + TestFormatSpecifier(tp, tz, "%Oe", " 1"); + TestFormatSpecifier(tp, tz, "%OH", "00"); + TestFormatSpecifier(tp, tz, "%OI", "12"); + TestFormatSpecifier(tp, tz, "%Om", "01"); + TestFormatSpecifier(tp, tz, "%OM", "00"); + TestFormatSpecifier(tp, tz, "%OS", "00"); + TestFormatSpecifier(tp, tz, "%Ou", "4"); // 4=Thursday + TestFormatSpecifier(tp, tz, "%OU", "00"); + TestFormatSpecifier(tp, tz, "%OV", "01"); + TestFormatSpecifier(tp, tz, "%Ow", "4"); // 4=Thursday + TestFormatSpecifier(tp, tz, "%OW", "00"); + TestFormatSpecifier(tp, tz, "%Oy", "70"); +#endif +} + +TEST(Format, Escaping) { + const time_zone tz = utc_time_zone(); + auto tp = chrono::system_clock::from_time_t(0); + + TestFormatSpecifier(tp, tz, "%%", "%"); + TestFormatSpecifier(tp, tz, "%%a", "%a"); + TestFormatSpecifier(tp, tz, "%%b", "%b"); + TestFormatSpecifier(tp, tz, "%%Ea", "%Ea"); + TestFormatSpecifier(tp, tz, "%%Es", "%Es"); + TestFormatSpecifier(tp, tz, "%%E3S", "%E3S"); + TestFormatSpecifier(tp, tz, "%%OS", "%OS"); + TestFormatSpecifier(tp, tz, "%%O3S", "%O3S"); + + // Multiple levels of escaping. + TestFormatSpecifier(tp, tz, "%%%Y", "%1970"); + TestFormatSpecifier(tp, tz, "%%%E3S", "%00.000"); + TestFormatSpecifier(tp, tz, "%%%%E3S", "%%E3S"); +} + +TEST(Format, ExtendedSeconds) { + const time_zone tz = utc_time_zone(); + + // No subseconds. + time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0); + tp += chrono::seconds(5); + EXPECT_EQ("05", format("%E*S", tp, tz)); + EXPECT_EQ("05", format("%E0S", tp, tz)); + EXPECT_EQ("05.0", format("%E1S", tp, tz)); + EXPECT_EQ("05.00", format("%E2S", tp, tz)); + EXPECT_EQ("05.000", format("%E3S", tp, tz)); + EXPECT_EQ("05.0000", format("%E4S", tp, tz)); + EXPECT_EQ("05.00000", format("%E5S", tp, tz)); + EXPECT_EQ("05.000000", format("%E6S", tp, tz)); + EXPECT_EQ("05.0000000", format("%E7S", tp, tz)); + EXPECT_EQ("05.00000000", format("%E8S", tp, tz)); + EXPECT_EQ("05.000000000", format("%E9S", tp, tz)); + EXPECT_EQ("05.0000000000", format("%E10S", tp, tz)); + EXPECT_EQ("05.00000000000", format("%E11S", tp, tz)); + EXPECT_EQ("05.000000000000", format("%E12S", tp, tz)); + EXPECT_EQ("05.0000000000000", format("%E13S", tp, tz)); + EXPECT_EQ("05.00000000000000", format("%E14S", tp, tz)); + EXPECT_EQ("05.000000000000000", format("%E15S", tp, tz)); + + // With subseconds. + tp += chrono::milliseconds(6) + chrono::microseconds(7) + + chrono::nanoseconds(8); + EXPECT_EQ("05.006007008", format("%E*S", tp, tz)); + EXPECT_EQ("05", format("%E0S", tp, tz)); + EXPECT_EQ("05.0", format("%E1S", tp, tz)); + EXPECT_EQ("05.00", format("%E2S", tp, tz)); + EXPECT_EQ("05.006", format("%E3S", tp, tz)); + EXPECT_EQ("05.0060", format("%E4S", tp, tz)); + EXPECT_EQ("05.00600", format("%E5S", tp, tz)); + EXPECT_EQ("05.006007", format("%E6S", tp, tz)); + EXPECT_EQ("05.0060070", format("%E7S", tp, tz)); + EXPECT_EQ("05.00600700", format("%E8S", tp, tz)); + EXPECT_EQ("05.006007008", format("%E9S", tp, tz)); + EXPECT_EQ("05.0060070080", format("%E10S", tp, tz)); + EXPECT_EQ("05.00600700800", format("%E11S", tp, tz)); + EXPECT_EQ("05.006007008000", format("%E12S", tp, tz)); + EXPECT_EQ("05.0060070080000", format("%E13S", tp, tz)); + EXPECT_EQ("05.00600700800000", format("%E14S", tp, tz)); + EXPECT_EQ("05.006007008000000", format("%E15S", tp, tz)); + + // Times before the Unix epoch. + tp = chrono::system_clock::from_time_t(0) + chrono::microseconds(-1); + EXPECT_EQ("1969-12-31 23:59:59.999999", + format("%Y-%m-%d %H:%M:%E*S", tp, tz)); + + // Here is a "%E*S" case we got wrong for a while. While the first + // instant below is correctly rendered as "...:07.333304", the second + // one used to appear as "...:07.33330499999999999". + tp = chrono::system_clock::from_time_t(0) + + chrono::microseconds(1395024427333304); + EXPECT_EQ("2014-03-17 02:47:07.333304", + format("%Y-%m-%d %H:%M:%E*S", tp, tz)); + tp += chrono::microseconds(1); + EXPECT_EQ("2014-03-17 02:47:07.333305", + format("%Y-%m-%d %H:%M:%E*S", tp, tz)); +} + +TEST(Format, ExtendedSubeconds) { + const time_zone tz = utc_time_zone(); + + // No subseconds. + time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0); + tp += chrono::seconds(5); + EXPECT_EQ("0", format("%E*f", tp, tz)); + EXPECT_EQ("", format("%E0f", tp, tz)); + EXPECT_EQ("0", format("%E1f", tp, tz)); + EXPECT_EQ("00", format("%E2f", tp, tz)); + EXPECT_EQ("000", format("%E3f", tp, tz)); + EXPECT_EQ("0000", format("%E4f", tp, tz)); + EXPECT_EQ("00000", format("%E5f", tp, tz)); + EXPECT_EQ("000000", format("%E6f", tp, tz)); + EXPECT_EQ("0000000", format("%E7f", tp, tz)); + EXPECT_EQ("00000000", format("%E8f", tp, tz)); + EXPECT_EQ("000000000", format("%E9f", tp, tz)); + EXPECT_EQ("0000000000", format("%E10f", tp, tz)); + EXPECT_EQ("00000000000", format("%E11f", tp, tz)); + EXPECT_EQ("000000000000", format("%E12f", tp, tz)); + EXPECT_EQ("0000000000000", format("%E13f", tp, tz)); + EXPECT_EQ("00000000000000", format("%E14f", tp, tz)); + EXPECT_EQ("000000000000000", format("%E15f", tp, tz)); + + // With subseconds. + tp += chrono::milliseconds(6) + chrono::microseconds(7) + + chrono::nanoseconds(8); + EXPECT_EQ("006007008", format("%E*f", tp, tz)); + EXPECT_EQ("", format("%E0f", tp, tz)); + EXPECT_EQ("0", format("%E1f", tp, tz)); + EXPECT_EQ("00", format("%E2f", tp, tz)); + EXPECT_EQ("006", format("%E3f", tp, tz)); + EXPECT_EQ("0060", format("%E4f", tp, tz)); + EXPECT_EQ("00600", format("%E5f", tp, tz)); + EXPECT_EQ("006007", format("%E6f", tp, tz)); + EXPECT_EQ("0060070", format("%E7f", tp, tz)); + EXPECT_EQ("00600700", format("%E8f", tp, tz)); + EXPECT_EQ("006007008", format("%E9f", tp, tz)); + EXPECT_EQ("0060070080", format("%E10f", tp, tz)); + EXPECT_EQ("00600700800", format("%E11f", tp, tz)); + EXPECT_EQ("006007008000", format("%E12f", tp, tz)); + EXPECT_EQ("0060070080000", format("%E13f", tp, tz)); + EXPECT_EQ("00600700800000", format("%E14f", tp, tz)); + EXPECT_EQ("006007008000000", format("%E15f", tp, tz)); + + // Times before the Unix epoch. + tp = chrono::system_clock::from_time_t(0) + chrono::microseconds(-1); + EXPECT_EQ("1969-12-31 23:59:59.999999", + format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz)); + + // Here is a "%E*S" case we got wrong for a while. While the first + // instant below is correctly rendered as "...:07.333304", the second + // one used to appear as "...:07.33330499999999999". + tp = chrono::system_clock::from_time_t(0) + + chrono::microseconds(1395024427333304); + EXPECT_EQ("2014-03-17 02:47:07.333304", + format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz)); + tp += chrono::microseconds(1); + EXPECT_EQ("2014-03-17 02:47:07.333305", + format("%Y-%m-%d %H:%M:%S.%E*f", tp, tz)); +} + +TEST(Format, CompareExtendSecondsVsSubseconds) { + const time_zone tz = utc_time_zone(); + + // This test case illustrates the differences/similarities between: + // fmt_A: %E<prec>S + // fmt_B: %S.%E<prec>f + auto fmt_A = [](const std::string& prec) { return "%E" + prec + "S"; }; + auto fmt_B = [](const std::string& prec) { return "%S.%E" + prec + "f"; }; + + // No subseconds: + time_point<chrono::nanoseconds> tp = chrono::system_clock::from_time_t(0); + tp += chrono::seconds(5); + // ... %E*S and %S.%E*f are different. + EXPECT_EQ("05", format(fmt_A("*"), tp, tz)); + EXPECT_EQ("05.0", format(fmt_B("*"), tp, tz)); + // ... %E0S and %S.%E0f are different. + EXPECT_EQ("05", format(fmt_A("0"), tp, tz)); + EXPECT_EQ("05.", format(fmt_B("0"), tp, tz)); + // ... %E<prec>S and %S.%E<prec>f are the same for prec in [1:15]. + for (int prec = 1; prec <= 15; ++prec) { + const std::string a = format(fmt_A(std::to_string(prec)), tp, tz); + const std::string b = format(fmt_B(std::to_string(prec)), tp, tz); + EXPECT_EQ(a, b) << "prec=" << prec; + } + + // With subseconds: + // ... %E*S and %S.%E*f are the same. + tp += chrono::milliseconds(6) + chrono::microseconds(7) + + chrono::nanoseconds(8); + EXPECT_EQ("05.006007008", format(fmt_A("*"), tp, tz)); + EXPECT_EQ("05.006007008", format(fmt_B("*"), tp, tz)); + // ... %E0S and %S.%E0f are different. + EXPECT_EQ("05", format(fmt_A("0"), tp, tz)); + EXPECT_EQ("05.", format(fmt_B("0"), tp, tz)); + // ... %E<prec>S and %S.%E<prec>f are the same for prec in [1:15]. + for (int prec = 1; prec <= 15; ++prec) { + const std::string a = format(fmt_A(std::to_string(prec)), tp, tz); + const std::string b = format(fmt_B(std::to_string(prec)), tp, tz); + EXPECT_EQ(a, b) << "prec=" << prec; + } +} + +TEST(Format, ExtendedOffset) { + const auto tp = chrono::system_clock::from_time_t(0); + + auto tz = fixed_time_zone(absl::time_internal::cctz::seconds::zero()); + TestFormatSpecifier(tp, tz, "%z", "+0000"); + TestFormatSpecifier(tp, tz, "%:z", "+00:00"); + TestFormatSpecifier(tp, tz, "%Ez", "+00:00"); + + tz = fixed_time_zone(chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%z", "+0000"); + TestFormatSpecifier(tp, tz, "%:z", "+00:00"); + TestFormatSpecifier(tp, tz, "%Ez", "+00:00"); + + tz = fixed_time_zone(-chrono::seconds(56)); // NOTE: +00:00 + TestFormatSpecifier(tp, tz, "%z", "+0000"); + TestFormatSpecifier(tp, tz, "%:z", "+00:00"); + TestFormatSpecifier(tp, tz, "%Ez", "+00:00"); + + tz = fixed_time_zone(chrono::minutes(34)); + TestFormatSpecifier(tp, tz, "%z", "+0034"); + TestFormatSpecifier(tp, tz, "%:z", "+00:34"); + TestFormatSpecifier(tp, tz, "%Ez", "+00:34"); + + tz = fixed_time_zone(-chrono::minutes(34)); + TestFormatSpecifier(tp, tz, "%z", "-0034"); + TestFormatSpecifier(tp, tz, "%:z", "-00:34"); + TestFormatSpecifier(tp, tz, "%Ez", "-00:34"); + + tz = fixed_time_zone(chrono::minutes(34) + chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%z", "+0034"); + TestFormatSpecifier(tp, tz, "%:z", "+00:34"); + TestFormatSpecifier(tp, tz, "%Ez", "+00:34"); + + tz = fixed_time_zone(-chrono::minutes(34) - chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%z", "-0034"); + TestFormatSpecifier(tp, tz, "%:z", "-00:34"); + TestFormatSpecifier(tp, tz, "%Ez", "-00:34"); + + tz = fixed_time_zone(chrono::hours(12)); + TestFormatSpecifier(tp, tz, "%z", "+1200"); + TestFormatSpecifier(tp, tz, "%:z", "+12:00"); + TestFormatSpecifier(tp, tz, "%Ez", "+12:00"); + + tz = fixed_time_zone(-chrono::hours(12)); + TestFormatSpecifier(tp, tz, "%z", "-1200"); + TestFormatSpecifier(tp, tz, "%:z", "-12:00"); + TestFormatSpecifier(tp, tz, "%Ez", "-12:00"); + + tz = fixed_time_zone(chrono::hours(12) + chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%z", "+1200"); + TestFormatSpecifier(tp, tz, "%:z", "+12:00"); + TestFormatSpecifier(tp, tz, "%Ez", "+12:00"); + + tz = fixed_time_zone(-chrono::hours(12) - chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%z", "-1200"); + TestFormatSpecifier(tp, tz, "%:z", "-12:00"); + TestFormatSpecifier(tp, tz, "%Ez", "-12:00"); + + tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34)); + TestFormatSpecifier(tp, tz, "%z", "+1234"); + TestFormatSpecifier(tp, tz, "%:z", "+12:34"); + TestFormatSpecifier(tp, tz, "%Ez", "+12:34"); + + tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34)); + TestFormatSpecifier(tp, tz, "%z", "-1234"); + TestFormatSpecifier(tp, tz, "%:z", "-12:34"); + TestFormatSpecifier(tp, tz, "%Ez", "-12:34"); + + tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34) + + chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%z", "+1234"); + TestFormatSpecifier(tp, tz, "%:z", "+12:34"); + TestFormatSpecifier(tp, tz, "%Ez", "+12:34"); + + tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34) - + chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%z", "-1234"); + TestFormatSpecifier(tp, tz, "%:z", "-12:34"); + TestFormatSpecifier(tp, tz, "%Ez", "-12:34"); +} + +TEST(Format, ExtendedSecondOffset) { + const auto tp = chrono::system_clock::from_time_t(0); + + auto tz = fixed_time_zone(absl::time_internal::cctz::seconds::zero()); + TestFormatSpecifier(tp, tz, "%E*z", "+00:00:00"); + TestFormatSpecifier(tp, tz, "%::z", "+00:00:00"); + TestFormatSpecifier(tp, tz, "%:::z", "+00"); + + tz = fixed_time_zone(chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%E*z", "+00:00:56"); + TestFormatSpecifier(tp, tz, "%::z", "+00:00:56"); + TestFormatSpecifier(tp, tz, "%:::z", "+00:00:56"); + + tz = fixed_time_zone(-chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%E*z", "-00:00:56"); + TestFormatSpecifier(tp, tz, "%::z", "-00:00:56"); + TestFormatSpecifier(tp, tz, "%:::z", "-00:00:56"); + + tz = fixed_time_zone(chrono::minutes(34)); + TestFormatSpecifier(tp, tz, "%E*z", "+00:34:00"); + TestFormatSpecifier(tp, tz, "%::z", "+00:34:00"); + TestFormatSpecifier(tp, tz, "%:::z", "+00:34"); + + tz = fixed_time_zone(-chrono::minutes(34)); + TestFormatSpecifier(tp, tz, "%E*z", "-00:34:00"); + TestFormatSpecifier(tp, tz, "%::z", "-00:34:00"); + TestFormatSpecifier(tp, tz, "%:::z", "-00:34"); + + tz = fixed_time_zone(chrono::minutes(34) + chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%E*z", "+00:34:56"); + TestFormatSpecifier(tp, tz, "%::z", "+00:34:56"); + TestFormatSpecifier(tp, tz, "%:::z", "+00:34:56"); + + tz = fixed_time_zone(-chrono::minutes(34) - chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%E*z", "-00:34:56"); + TestFormatSpecifier(tp, tz, "%::z", "-00:34:56"); + TestFormatSpecifier(tp, tz, "%:::z", "-00:34:56"); + + tz = fixed_time_zone(chrono::hours(12)); + TestFormatSpecifier(tp, tz, "%E*z", "+12:00:00"); + TestFormatSpecifier(tp, tz, "%::z", "+12:00:00"); + TestFormatSpecifier(tp, tz, "%:::z", "+12"); + + tz = fixed_time_zone(-chrono::hours(12)); + TestFormatSpecifier(tp, tz, "%E*z", "-12:00:00"); + TestFormatSpecifier(tp, tz, "%::z", "-12:00:00"); + TestFormatSpecifier(tp, tz, "%:::z", "-12"); + + tz = fixed_time_zone(chrono::hours(12) + chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%E*z", "+12:00:56"); + TestFormatSpecifier(tp, tz, "%::z", "+12:00:56"); + TestFormatSpecifier(tp, tz, "%:::z", "+12:00:56"); + + tz = fixed_time_zone(-chrono::hours(12) - chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%E*z", "-12:00:56"); + TestFormatSpecifier(tp, tz, "%::z", "-12:00:56"); + TestFormatSpecifier(tp, tz, "%:::z", "-12:00:56"); + + tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34)); + TestFormatSpecifier(tp, tz, "%E*z", "+12:34:00"); + TestFormatSpecifier(tp, tz, "%::z", "+12:34:00"); + TestFormatSpecifier(tp, tz, "%:::z", "+12:34"); + + tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34)); + TestFormatSpecifier(tp, tz, "%E*z", "-12:34:00"); + TestFormatSpecifier(tp, tz, "%::z", "-12:34:00"); + TestFormatSpecifier(tp, tz, "%:::z", "-12:34"); + + tz = fixed_time_zone(chrono::hours(12) + chrono::minutes(34) + + chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%E*z", "+12:34:56"); + TestFormatSpecifier(tp, tz, "%::z", "+12:34:56"); + TestFormatSpecifier(tp, tz, "%:::z", "+12:34:56"); + + tz = fixed_time_zone(-chrono::hours(12) - chrono::minutes(34) - + chrono::seconds(56)); + TestFormatSpecifier(tp, tz, "%E*z", "-12:34:56"); + TestFormatSpecifier(tp, tz, "%::z", "-12:34:56"); + TestFormatSpecifier(tp, tz, "%:::z", "-12:34:56"); +} + +TEST(Format, ExtendedYears) { + const time_zone utc = utc_time_zone(); + const char e4y_fmt[] = "%E4Y%m%d"; // no separators + + // %E4Y zero-pads the year to produce at least 4 chars, including the sign. + auto tp = convert(civil_second(-999, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("-9991127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(-99, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("-0991127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(-9, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("-0091127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(-1, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("-0011127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(0, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("00001127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(1, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("00011127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(9, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("00091127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(99, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("00991127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(999, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("09991127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(9999, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("99991127", format(e4y_fmt, tp, utc)); + + // When the year is outside [-999:9999], more than 4 chars are produced. + tp = convert(civil_second(-1000, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("-10001127", format(e4y_fmt, tp, utc)); + tp = convert(civil_second(10000, 11, 27, 0, 0, 0), utc); + EXPECT_EQ("100001127", format(e4y_fmt, tp, utc)); +} + +TEST(Format, RFC3339Format) { + time_zone tz; + EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz)); + + time_point<chrono::nanoseconds> tp = + convert(civil_second(1977, 6, 28, 9, 8, 7), tz); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::milliseconds(100); + EXPECT_EQ("1977-06-28T09:08:07.1-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::milliseconds(20); + EXPECT_EQ("1977-06-28T09:08:07.12-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::milliseconds(3); + EXPECT_EQ("1977-06-28T09:08:07.123-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::microseconds(400); + EXPECT_EQ("1977-06-28T09:08:07.1234-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::microseconds(50); + EXPECT_EQ("1977-06-28T09:08:07.12345-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::microseconds(6); + EXPECT_EQ("1977-06-28T09:08:07.123456-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::nanoseconds(700); + EXPECT_EQ("1977-06-28T09:08:07.1234567-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::nanoseconds(80); + EXPECT_EQ("1977-06-28T09:08:07.12345678-07:00", format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); + + tp += chrono::nanoseconds(9); + EXPECT_EQ("1977-06-28T09:08:07.123456789-07:00", + format(RFC3339_full, tp, tz)); + EXPECT_EQ("1977-06-28T09:08:07-07:00", format(RFC3339_sec, tp, tz)); +} + +TEST(Format, RFC1123Format) { // locale specific + time_zone tz; + EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz)); + + auto tp = convert(civil_second(1977, 6, 28, 9, 8, 7), tz); + EXPECT_EQ("Tue, 28 Jun 1977 09:08:07 -0700", format(RFC1123_full, tp, tz)); + EXPECT_EQ("28 Jun 1977 09:08:07 -0700", format(RFC1123_no_wday, tp, tz)); +} + +// +// Testing parse() +// + +TEST(Parse, TimePointResolution) { + const char kFmt[] = "%H:%M:%E*S"; + const time_zone utc = utc_time_zone(); + + time_point<chrono::nanoseconds> tp_ns; + EXPECT_TRUE(parse(kFmt, "03:04:05.123456789", utc, &tp_ns)); + EXPECT_EQ("03:04:05.123456789", format(kFmt, tp_ns, utc)); + EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_ns)); + EXPECT_EQ("03:04:05.123456", format(kFmt, tp_ns, utc)); + + time_point<chrono::microseconds> tp_us; + EXPECT_TRUE(parse(kFmt, "03:04:05.123456789", utc, &tp_us)); + EXPECT_EQ("03:04:05.123456", format(kFmt, tp_us, utc)); + EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_us)); + EXPECT_EQ("03:04:05.123456", format(kFmt, tp_us, utc)); + EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_us)); + EXPECT_EQ("03:04:05.123", format(kFmt, tp_us, utc)); + + time_point<chrono::milliseconds> tp_ms; + EXPECT_TRUE(parse(kFmt, "03:04:05.123456", utc, &tp_ms)); + EXPECT_EQ("03:04:05.123", format(kFmt, tp_ms, utc)); + EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_ms)); + EXPECT_EQ("03:04:05.123", format(kFmt, tp_ms, utc)); + EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_ms)); + EXPECT_EQ("03:04:05", format(kFmt, tp_ms, utc)); + + time_point<chrono::seconds> tp_s; + EXPECT_TRUE(parse(kFmt, "03:04:05.123", utc, &tp_s)); + EXPECT_EQ("03:04:05", format(kFmt, tp_s, utc)); + EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_s)); + EXPECT_EQ("03:04:05", format(kFmt, tp_s, utc)); + + time_point<chrono::minutes> tp_m; + EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_m)); + EXPECT_EQ("03:04:00", format(kFmt, tp_m, utc)); + + time_point<chrono::hours> tp_h; + EXPECT_TRUE(parse(kFmt, "03:04:05", utc, &tp_h)); + EXPECT_EQ("03:00:00", format(kFmt, tp_h, utc)); +} + +TEST(Parse, TimePointExtendedResolution) { + const char kFmt[] = "%H:%M:%E*S"; + const time_zone utc = utc_time_zone(); + + time_point<absl::time_internal::cctz::seconds> tp; + detail::femtoseconds fs; + EXPECT_TRUE(detail::parse(kFmt, "12:34:56.123456789012345", utc, &tp, &fs)); + EXPECT_EQ("12:34:56.123456789012345", detail::format(kFmt, tp, fs, utc)); + EXPECT_TRUE(detail::parse(kFmt, "12:34:56.012345678901234", utc, &tp, &fs)); + EXPECT_EQ("12:34:56.012345678901234", detail::format(kFmt, tp, fs, utc)); + EXPECT_TRUE(detail::parse(kFmt, "12:34:56.001234567890123", utc, &tp, &fs)); + EXPECT_EQ("12:34:56.001234567890123", detail::format(kFmt, tp, fs, utc)); + EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000123", utc, &tp, &fs)); + EXPECT_EQ("12:34:56.000000000000123", detail::format(kFmt, tp, fs, utc)); + EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000012", utc, &tp, &fs)); + EXPECT_EQ("12:34:56.000000000000012", detail::format(kFmt, tp, fs, utc)); + EXPECT_TRUE(detail::parse(kFmt, "12:34:56.000000000000001", utc, &tp, &fs)); + EXPECT_EQ("12:34:56.000000000000001", detail::format(kFmt, tp, fs, utc)); +} + +TEST(Parse, Basics) { + time_zone tz = utc_time_zone(); + time_point<chrono::nanoseconds> tp = + chrono::system_clock::from_time_t(1234567890); + + // Simple edge cases. + EXPECT_TRUE(parse("", "", tz, &tp)); + EXPECT_EQ(chrono::system_clock::from_time_t(0), tp); // everything defaulted + EXPECT_TRUE(parse(" ", " ", tz, &tp)); + EXPECT_TRUE(parse(" ", " ", tz, &tp)); + EXPECT_TRUE(parse("x", "x", tz, &tp)); + EXPECT_TRUE(parse("xxx", "xxx", tz, &tp)); + + EXPECT_TRUE( + parse("%Y-%m-%d %H:%M:%S %z", "2013-06-28 19:08:09 -0800", tz, &tp)); + ExpectTime(tp, tz, 2013, 6, 29, 3, 8, 9, 0, false, "UTC"); +} + +TEST(Parse, WithTimeZone) { + time_zone tz; + EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz)); + time_point<chrono::nanoseconds> tp; + + // We can parse a std::string without a UTC offset if we supply a timezone. + EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2013-06-28 19:08:09", tz, &tp)); + ExpectTime(tp, tz, 2013, 6, 28, 19, 8, 9, -7 * 60 * 60, true, "PDT"); + + // But the timezone is ignored when a UTC offset is present. + EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S %z", "2013-06-28 19:08:09 +0800", + utc_time_zone(), &tp)); + ExpectTime(tp, tz, 2013, 6, 28, 19 - 8 - 7, 8, 9, -7 * 60 * 60, true, "PDT"); + + // Check a skipped time (a Spring DST transition). parse() uses the + // pre-transition offset. + EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2011-03-13 02:15:00", tz, &tp)); + ExpectTime(tp, tz, 2011, 3, 13, 3, 15, 0, -7 * 60 * 60, true, "PDT"); + + // Check a repeated time (a Fall DST transition). parse() uses the + // pre-transition offset. + EXPECT_TRUE(parse("%Y-%m-%d %H:%M:%S", "2011-11-06 01:15:00", tz, &tp)); + ExpectTime(tp, tz, 2011, 11, 6, 1, 15, 0, -7 * 60 * 60, true, "PDT"); +} + +TEST(Parse, LeapSecond) { + time_zone tz; + EXPECT_TRUE(load_time_zone("America/Los_Angeles", &tz)); + time_point<chrono::nanoseconds> tp; + + // ":59" -> ":59" + EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:59-08:00", tz, &tp)); + ExpectTime(tp, tz, 2013, 6, 28, 8, 8, 59, -7 * 60 * 60, true, "PDT"); + + // ":59.5" -> ":59.5" + EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:59.5-08:00", tz, &tp)); + ExpectTime(tp, tz, 2013, 6, 28, 8, 8, 59, -7 * 60 * 60, true, "PDT"); + + // ":60" -> ":00" + EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:60-08:00", tz, &tp)); + ExpectTime(tp, tz, 2013, 6, 28, 8, 9, 0, -7 * 60 * 60, true, "PDT"); + + // ":60.5" -> ":00.0" + EXPECT_TRUE(parse(RFC3339_full, "2013-06-28T07:08:60.5-08:00", tz, &tp)); + ExpectTime(tp, tz, 2013, 6, 28, 8, 9, 0, -7 * 60 * 60, true, "PDT"); + + // ":61" -> error + EXPECT_FALSE(parse(RFC3339_full, "2013-06-28T07:08:61-08:00", tz, &tp)); +} + +TEST(Parse, ErrorCases) { + const time_zone tz = utc_time_zone(); + auto tp = chrono::system_clock::from_time_t(0); + + // Illegal trailing data. + EXPECT_FALSE(parse("%S", "123", tz, &tp)); + + // Can't parse an illegal format specifier. + EXPECT_FALSE(parse("%Q", "x", tz, &tp)); + + // Fails because of trailing, unparsed data "blah". + EXPECT_FALSE(parse("%m-%d", "2-3 blah", tz, &tp)); + + // Trailing whitespace is allowed. + EXPECT_TRUE(parse("%m-%d", "2-3 ", tz, &tp)); + EXPECT_EQ(2, convert(tp, utc_time_zone()).month()); + EXPECT_EQ(3, convert(tp, utc_time_zone()).day()); + + // Feb 31 requires normalization. + EXPECT_FALSE(parse("%m-%d", "2-31", tz, &tp)); + + // Check that we cannot have spaces in UTC offsets. + EXPECT_TRUE(parse("%z", "-0203", tz, &tp)); + EXPECT_FALSE(parse("%z", "- 2 3", tz, &tp)); + EXPECT_TRUE(parse("%Ez", "-02:03", tz, &tp)); + EXPECT_FALSE(parse("%Ez", "- 2: 3", tz, &tp)); + + // Check that we reject other malformed UTC offsets. + EXPECT_FALSE(parse("%Ez", "+-08:00", tz, &tp)); + EXPECT_FALSE(parse("%Ez", "-+08:00", tz, &tp)); + + // Check that we do not accept "-0" in fields that allow zero. + EXPECT_FALSE(parse("%Y", "-0", tz, &tp)); + EXPECT_FALSE(parse("%E4Y", "-0", tz, &tp)); + EXPECT_FALSE(parse("%H", "-0", tz, &tp)); + EXPECT_FALSE(parse("%M", "-0", tz, &tp)); + EXPECT_FALSE(parse("%S", "-0", tz, &tp)); + EXPECT_FALSE(parse("%z", "+-000", tz, &tp)); + EXPECT_FALSE(parse("%Ez", "+-0:00", tz, &tp)); + EXPECT_FALSE(parse("%z", "-00-0", tz, &tp)); + EXPECT_FALSE(parse("%Ez", "-00:-0", tz, &tp)); +} + +TEST(Parse, PosixConversions) { + time_zone tz = utc_time_zone(); + auto tp = chrono::system_clock::from_time_t(0); + const auto reset = convert(civil_second(1977, 6, 28, 9, 8, 7), tz); + + tp = reset; + EXPECT_TRUE(parse("%d", "15", tz, &tp)); + EXPECT_EQ(15, convert(tp, tz).day()); + + // %e is an extension, but is supported internally. + tp = reset; + EXPECT_TRUE(parse("%e", "15", tz, &tp)); + EXPECT_EQ(15, convert(tp, tz).day()); // Equivalent to %d + + tp = reset; + EXPECT_TRUE(parse("%H", "17", tz, &tp)); + EXPECT_EQ(17, convert(tp, tz).hour()); + + tp = reset; + EXPECT_TRUE(parse("%I", "5", tz, &tp)); + EXPECT_EQ(5, convert(tp, tz).hour()); + + // %j is parsed but ignored. + EXPECT_TRUE(parse("%j", "32", tz, &tp)); + + tp = reset; + EXPECT_TRUE(parse("%m", "11", tz, &tp)); + EXPECT_EQ(11, convert(tp, tz).month()); + + tp = reset; + EXPECT_TRUE(parse("%M", "33", tz, &tp)); + EXPECT_EQ(33, convert(tp, tz).minute()); + + tp = reset; + EXPECT_TRUE(parse("%S", "55", tz, &tp)); + EXPECT_EQ(55, convert(tp, tz).second()); + + // %U is parsed but ignored. + EXPECT_TRUE(parse("%U", "15", tz, &tp)); + + // %w is parsed but ignored. + EXPECT_TRUE(parse("%w", "2", tz, &tp)); + + // %W is parsed but ignored. + EXPECT_TRUE(parse("%W", "22", tz, &tp)); + + tp = reset; + EXPECT_TRUE(parse("%y", "04", tz, &tp)); + EXPECT_EQ(2004, convert(tp, tz).year()); + + tp = reset; + EXPECT_TRUE(parse("%Y", "2004", tz, &tp)); + EXPECT_EQ(2004, convert(tp, tz).year()); + + EXPECT_TRUE(parse("%%", "%", tz, &tp)); + +#if defined(__linux__) + // SU/C99/TZ extensions + + // Because we handle each (non-internal) specifier in a separate call + // to strptime(), there is no way to group %C and %y together. So we + // just skip the %C/%y case. +#if 0 + tp = reset; + EXPECT_TRUE(parse("%C %y", "20 04", tz, &tp)); + EXPECT_EQ(2004, convert(tp, tz).year()); +#endif + + tp = reset; + EXPECT_TRUE(parse("%D", "02/03/04", tz, &tp)); + EXPECT_EQ(2, convert(tp, tz).month()); + EXPECT_EQ(3, convert(tp, tz).day()); + EXPECT_EQ(2004, convert(tp, tz).year()); + + EXPECT_TRUE(parse("%n", "\n", tz, &tp)); + + tp = reset; + EXPECT_TRUE(parse("%R", "03:44", tz, &tp)); + EXPECT_EQ(3, convert(tp, tz).hour()); + EXPECT_EQ(44, convert(tp, tz).minute()); + + EXPECT_TRUE(parse("%t", "\t\v\f\n\r ", tz, &tp)); + + tp = reset; + EXPECT_TRUE(parse("%T", "03:44:55", tz, &tp)); + EXPECT_EQ(3, convert(tp, tz).hour()); + EXPECT_EQ(44, convert(tp, tz).minute()); + EXPECT_EQ(55, convert(tp, tz).second()); + + tp = reset; + EXPECT_TRUE(parse("%s", "1234567890", tz, &tp)); + EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp); + + // %s conversion, like %z/%Ez, pays no heed to the optional zone. + time_zone lax; + EXPECT_TRUE(load_time_zone("America/Los_Angeles", &lax)); + tp = reset; + EXPECT_TRUE(parse("%s", "1234567890", lax, &tp)); + EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp); + + // This is most important when the time has the same YMDhms + // breakdown in the zone as some other time. For example, ... + // 1414917000 in US/Pacific -> Sun Nov 2 01:30:00 2014 (PDT) + // 1414920600 in US/Pacific -> Sun Nov 2 01:30:00 2014 (PST) + tp = reset; + EXPECT_TRUE(parse("%s", "1414917000", lax, &tp)); + EXPECT_EQ(chrono::system_clock::from_time_t(1414917000), tp); + tp = reset; + EXPECT_TRUE(parse("%s", "1414920600", lax, &tp)); + EXPECT_EQ(chrono::system_clock::from_time_t(1414920600), tp); +#endif +} + +TEST(Parse, LocaleSpecific) { + time_zone tz = utc_time_zone(); + auto tp = chrono::system_clock::from_time_t(0); + const auto reset = convert(civil_second(1977, 6, 28, 9, 8, 7), tz); + + // %a is parsed but ignored. + EXPECT_TRUE(parse("%a", "Mon", tz, &tp)); + + // %A is parsed but ignored. + EXPECT_TRUE(parse("%A", "Monday", tz, &tp)); + + tp = reset; + EXPECT_TRUE(parse("%b", "Feb", tz, &tp)); + EXPECT_EQ(2, convert(tp, tz).month()); + + tp = reset; + EXPECT_TRUE(parse("%B", "February", tz, &tp)); + EXPECT_EQ(2, convert(tp, tz).month()); + + // %p is parsed but ignored if it's alone. But it's used with %I. + EXPECT_TRUE(parse("%p", "AM", tz, &tp)); + tp = reset; + EXPECT_TRUE(parse("%I %p", "5 PM", tz, &tp)); + EXPECT_EQ(17, convert(tp, tz).hour()); + + tp = reset; + EXPECT_TRUE(parse("%x", "02/03/04", tz, &tp)); + if (convert(tp, tz).month() == 2) { + EXPECT_EQ(3, convert(tp, tz).day()); + } else { + EXPECT_EQ(2, convert(tp, tz).day()); + EXPECT_EQ(3, convert(tp, tz).month()); + } + EXPECT_EQ(2004, convert(tp, tz).year()); + + tp = reset; + EXPECT_TRUE(parse("%X", "15:44:55", tz, &tp)); + EXPECT_EQ(15, convert(tp, tz).hour()); + EXPECT_EQ(44, convert(tp, tz).minute()); + EXPECT_EQ(55, convert(tp, tz).second()); + +#if defined(__linux__) + // SU/C99/TZ extensions + + tp = reset; + EXPECT_TRUE(parse("%h", "Feb", tz, &tp)); + EXPECT_EQ(2, convert(tp, tz).month()); // Equivalent to %b + + tp = reset; + EXPECT_TRUE(parse("%l %p", "5 PM", tz, &tp)); + EXPECT_EQ(17, convert(tp, tz).hour()); + + tp = reset; + EXPECT_TRUE(parse("%r", "03:44:55 PM", tz, &tp)); + EXPECT_EQ(15, convert(tp, tz).hour()); + EXPECT_EQ(44, convert(tp, tz).minute()); + EXPECT_EQ(55, convert(tp, tz).second()); + + tp = reset; + EXPECT_TRUE(parse("%Ec", "Tue Nov 19 05:06:07 2013", tz, &tp)); + EXPECT_EQ(convert(civil_second(2013, 11, 19, 5, 6, 7), tz), tp); + + // Modified conversion specifiers %E_ + + tp = reset; + EXPECT_TRUE(parse("%Ex", "02/03/04", tz, &tp)); + EXPECT_EQ(2, convert(tp, tz).month()); + EXPECT_EQ(3, convert(tp, tz).day()); + EXPECT_EQ(2004, convert(tp, tz).year()); + + tp = reset; + EXPECT_TRUE(parse("%EX", "15:44:55", tz, &tp)); + EXPECT_EQ(15, convert(tp, tz).hour()); + EXPECT_EQ(44, convert(tp, tz).minute()); + EXPECT_EQ(55, convert(tp, tz).second()); + + // %Ey, the year offset from %EC, doesn't really make sense alone as there + // is no way to represent it in tm_year (%EC is not simply the century). + // Yet, because we handle each (non-internal) specifier in a separate call + // to strptime(), there is no way to group %EC and %Ey either. So we just + // skip the %EC and %Ey cases. + + tp = reset; + EXPECT_TRUE(parse("%EY", "2004", tz, &tp)); + EXPECT_EQ(2004, convert(tp, tz).year()); + + // Modified conversion specifiers %O_ + + tp = reset; + EXPECT_TRUE(parse("%Od", "15", tz, &tp)); + EXPECT_EQ(15, convert(tp, tz).day()); + + tp = reset; + EXPECT_TRUE(parse("%Oe", "15", tz, &tp)); + EXPECT_EQ(15, convert(tp, tz).day()); // Equivalent to %d + + tp = reset; + EXPECT_TRUE(parse("%OH", "17", tz, &tp)); + EXPECT_EQ(17, convert(tp, tz).hour()); + + tp = reset; + EXPECT_TRUE(parse("%OI", "5", tz, &tp)); + EXPECT_EQ(5, convert(tp, tz).hour()); + + tp = reset; + EXPECT_TRUE(parse("%Om", "11", tz, &tp)); + EXPECT_EQ(11, convert(tp, tz).month()); + + tp = reset; + EXPECT_TRUE(parse("%OM", "33", tz, &tp)); + EXPECT_EQ(33, convert(tp, tz).minute()); + + tp = reset; + EXPECT_TRUE(parse("%OS", "55", tz, &tp)); + EXPECT_EQ(55, convert(tp, tz).second()); + + // %OU is parsed but ignored. + EXPECT_TRUE(parse("%OU", "15", tz, &tp)); + + // %Ow is parsed but ignored. + EXPECT_TRUE(parse("%Ow", "2", tz, &tp)); + + // %OW is parsed but ignored. + EXPECT_TRUE(parse("%OW", "22", tz, &tp)); + + tp = reset; + EXPECT_TRUE(parse("%Oy", "04", tz, &tp)); + EXPECT_EQ(2004, convert(tp, tz).year()); +#endif +} + +TEST(Parse, ExtendedSeconds) { + const time_zone tz = utc_time_zone(); + const time_point<chrono::nanoseconds> unix_epoch = + chrono::system_clock::from_time_t(0); + + // All %E<prec>S cases are treated the same as %E*S on input. + auto precisions = {"*", "0", "1", "2", "3", "4", "5", "6", "7", + "8", "9", "10", "11", "12", "13", "14", "15"}; + for (const std::string& prec : precisions) { + const std::string fmt = "%E" + prec + "S"; + SCOPED_TRACE(fmt); + time_point<chrono::nanoseconds> tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "5", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05.0", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05.00", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05.6", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05.60", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05.600", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(600), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05.67", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(670), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05.670", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(670), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "05.678", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::seconds(5) + chrono::milliseconds(678), tp); + } + + // Here is a "%E*S" case we got wrong for a while. The fractional + // part of the first instant is less than 2^31 and was correctly + // parsed, while the second (and any subsecond field >=2^31) failed. + time_point<chrono::nanoseconds> tp = unix_epoch; + EXPECT_TRUE(parse("%E*S", "0.2147483647", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); + tp = unix_epoch; + EXPECT_TRUE(parse("%E*S", "0.2147483648", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); + + // We should also be able to specify long strings of digits far + // beyond the current resolution and have them convert the same way. + tp = unix_epoch; + EXPECT_TRUE(parse( + "%E*S", "0.214748364801234567890123456789012345678901234567890123456789", + tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); +} + +TEST(Parse, ExtendedSecondsScan) { + const time_zone tz = utc_time_zone(); + time_point<chrono::nanoseconds> tp; + for (int ms = 0; ms < 1000; ms += 111) { + for (int us = 0; us < 1000; us += 27) { + const int micros = ms * 1000 + us; + for (int ns = 0; ns < 1000; ns += 9) { + const auto expected = chrono::system_clock::from_time_t(0) + + chrono::nanoseconds(micros * 1000 + ns); + std::ostringstream oss; + oss << "0." << std::setfill('0') << std::setw(3); + oss << ms << std::setw(3) << us << std::setw(3) << ns; + const std::string input = oss.str(); + EXPECT_TRUE(parse("%E*S", input, tz, &tp)); + EXPECT_EQ(expected, tp) << input; + } + } + } +} + +TEST(Parse, ExtendedSubeconds) { + const time_zone tz = utc_time_zone(); + const time_point<chrono::nanoseconds> unix_epoch = + chrono::system_clock::from_time_t(0); + + // All %E<prec>f cases are treated the same as %E*f on input. + auto precisions = {"*", "0", "1", "2", "3", "4", "5", "6", "7", + "8", "9", "10", "11", "12", "13", "14", "15"}; + for (const std::string& prec : precisions) { + const std::string fmt = "%E" + prec + "f"; + SCOPED_TRACE(fmt); + time_point<chrono::nanoseconds> tp = unix_epoch - chrono::seconds(1); + EXPECT_TRUE(parse(fmt, "", tz, &tp)); + EXPECT_EQ(unix_epoch, tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "6", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "60", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "600", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::milliseconds(600), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "67", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::milliseconds(670), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "670", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::milliseconds(670), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "678", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::milliseconds(678), tp); + tp = unix_epoch; + EXPECT_TRUE(parse(fmt, "6789", tz, &tp)); + EXPECT_EQ( + unix_epoch + chrono::milliseconds(678) + chrono::microseconds(900), tp); + } + + // Here is a "%E*f" case we got wrong for a while. The fractional + // part of the first instant is less than 2^31 and was correctly + // parsed, while the second (and any subsecond field >=2^31) failed. + time_point<chrono::nanoseconds> tp = unix_epoch; + EXPECT_TRUE(parse("%E*f", "2147483647", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); + tp = unix_epoch; + EXPECT_TRUE(parse("%E*f", "2147483648", tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); + + // We should also be able to specify long strings of digits far + // beyond the current resolution and have them convert the same way. + tp = unix_epoch; + EXPECT_TRUE(parse( + "%E*f", "214748364801234567890123456789012345678901234567890123456789", + tz, &tp)); + EXPECT_EQ(unix_epoch + chrono::nanoseconds(214748364), tp); +} + +TEST(Parse, ExtendedSubecondsScan) { + time_point<chrono::nanoseconds> tp; + const time_zone tz = utc_time_zone(); + for (int ms = 0; ms < 1000; ms += 111) { + for (int us = 0; us < 1000; us += 27) { + const int micros = ms * 1000 + us; + for (int ns = 0; ns < 1000; ns += 9) { + std::ostringstream oss; + oss << std::setfill('0') << std::setw(3) << ms; + oss << std::setw(3) << us << std::setw(3) << ns; + const std::string nanos = oss.str(); + const auto expected = chrono::system_clock::from_time_t(0) + + chrono::nanoseconds(micros * 1000 + ns); + for (int ps = 0; ps < 1000; ps += 250) { + std::ostringstream ps_oss; + oss << std::setfill('0') << std::setw(3) << ps; + const std::string input = nanos + ps_oss.str() + "999"; + EXPECT_TRUE(parse("%E*f", input, tz, &tp)); + EXPECT_EQ(expected + chrono::nanoseconds(ps) / 1000, tp) << input; + } + } + } + } +} + +TEST(Parse, ExtendedOffset) { + const time_zone utc = utc_time_zone(); + time_point<absl::time_internal::cctz::seconds> tp; + + EXPECT_TRUE(parse("%Ez", "+00:00", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse("%Ez", "-12:34", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp); + EXPECT_TRUE(parse("%Ez", "+12:34", utc, &tp)); + EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp); + EXPECT_FALSE(parse("%Ez", "-12:3", utc, &tp)); + + for (auto fmt : {"%Ez", "%z"}) { + EXPECT_TRUE(parse(fmt, "+0000", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "-1234", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "+1234", utc, &tp)); + EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp); + EXPECT_FALSE(parse(fmt, "-123", utc, &tp)); + + EXPECT_TRUE(parse(fmt, "+00", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "-12", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "+12", utc, &tp)); + EXPECT_EQ(convert(civil_second(1969, 12, 31, 12, 0, 0), utc), tp); + EXPECT_FALSE(parse(fmt, "-1", utc, &tp)); + } +} + +TEST(Parse, ExtendedSecondOffset) { + const time_zone utc = utc_time_zone(); + time_point<absl::time_internal::cctz::seconds> tp; + + for (auto fmt : {"%Ez", "%E*z", "%:z", "%::z", "%:::z"}) { + EXPECT_TRUE(parse(fmt, "+00:00:00", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "-12:34:56", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 56), utc), tp); + EXPECT_TRUE(parse(fmt, "+12:34:56", utc, &tp)); + EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 25, 4), utc), tp); + EXPECT_FALSE(parse(fmt, "-12:34:5", utc, &tp)); + + EXPECT_TRUE(parse(fmt, "+000000", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "-123456", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 56), utc), tp); + EXPECT_TRUE(parse(fmt, "+123456", utc, &tp)); + EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 25, 4), utc), tp); + EXPECT_FALSE(parse(fmt, "-12345", utc, &tp)); + + EXPECT_TRUE(parse(fmt, "+00:00", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "-12:34", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "+12:34", utc, &tp)); + EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp); + EXPECT_FALSE(parse(fmt, "-12:3", utc, &tp)); + + EXPECT_TRUE(parse(fmt, "+0000", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "-1234", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 34, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "+1234", utc, &tp)); + EXPECT_EQ(convert(civil_second(1969, 12, 31, 11, 26, 0), utc), tp); + EXPECT_FALSE(parse(fmt, "-123", utc, &tp)); + + EXPECT_TRUE(parse(fmt, "+00", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "-12", utc, &tp)); + EXPECT_EQ(convert(civil_second(1970, 1, 1, 12, 0, 0), utc), tp); + EXPECT_TRUE(parse(fmt, "+12", utc, &tp)); + EXPECT_EQ(convert(civil_second(1969, 12, 31, 12, 0, 0), utc), tp); + EXPECT_FALSE(parse(fmt, "-1", utc, &tp)); + } +} + +TEST(Parse, ExtendedYears) { + const time_zone utc = utc_time_zone(); + const char e4y_fmt[] = "%E4Y%m%d"; // no separators + time_point<absl::time_internal::cctz::seconds> tp; + + // %E4Y consumes exactly four chars, including any sign. + EXPECT_TRUE(parse(e4y_fmt, "-9991127", utc, &tp)); + EXPECT_EQ(convert(civil_second(-999, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "-0991127", utc, &tp)); + EXPECT_EQ(convert(civil_second(-99, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "-0091127", utc, &tp)); + EXPECT_EQ(convert(civil_second(-9, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "-0011127", utc, &tp)); + EXPECT_EQ(convert(civil_second(-1, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "00001127", utc, &tp)); + EXPECT_EQ(convert(civil_second(0, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "00011127", utc, &tp)); + EXPECT_EQ(convert(civil_second(1, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "00091127", utc, &tp)); + EXPECT_EQ(convert(civil_second(9, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "00991127", utc, &tp)); + EXPECT_EQ(convert(civil_second(99, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "09991127", utc, &tp)); + EXPECT_EQ(convert(civil_second(999, 11, 27, 0, 0, 0), utc), tp); + EXPECT_TRUE(parse(e4y_fmt, "99991127", utc, &tp)); + EXPECT_EQ(convert(civil_second(9999, 11, 27, 0, 0, 0), utc), tp); + + // When the year is outside [-999:9999], the parse fails. + EXPECT_FALSE(parse(e4y_fmt, "-10001127", utc, &tp)); + EXPECT_FALSE(parse(e4y_fmt, "100001127", utc, &tp)); +} + +TEST(Parse, RFC3339Format) { + const time_zone tz = utc_time_zone(); + time_point<chrono::nanoseconds> tp; + EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00+00:00", tz, &tp)); + ExpectTime(tp, tz, 2014, 2, 12, 20, 21, 0, 0, false, "UTC"); + + // Check that %Ez also accepts "Z" as a synonym for "+00:00". + time_point<chrono::nanoseconds> tp2; + EXPECT_TRUE(parse(RFC3339_sec, "2014-02-12T20:21:00Z", tz, &tp2)); + EXPECT_EQ(tp, tp2); +} + +TEST(Parse, MaxRange) { + const time_zone utc = utc_time_zone(); + time_point<absl::time_internal::cctz::seconds> tp; + + // tests the upper limit using +00:00 offset + EXPECT_TRUE( + parse(RFC3339_sec, "292277026596-12-04T15:30:07+00:00", utc, &tp)); + EXPECT_EQ(tp, time_point<absl::time_internal::cctz::seconds>::max()); + EXPECT_FALSE( + parse(RFC3339_sec, "292277026596-12-04T15:30:08+00:00", utc, &tp)); + + // tests the upper limit using -01:00 offset + EXPECT_TRUE( + parse(RFC3339_sec, "292277026596-12-04T14:30:07-01:00", utc, &tp)); + EXPECT_EQ(tp, time_point<absl::time_internal::cctz::seconds>::max()); + EXPECT_FALSE( + parse(RFC3339_sec, "292277026596-12-04T15:30:07-01:00", utc, &tp)); + + // tests the lower limit using +00:00 offset + EXPECT_TRUE( + parse(RFC3339_sec, "-292277022657-01-27T08:29:52+00:00", utc, &tp)); + EXPECT_EQ(tp, time_point<absl::time_internal::cctz::seconds>::min()); + EXPECT_FALSE( + parse(RFC3339_sec, "-292277022657-01-27T08:29:51+00:00", utc, &tp)); + + // tests the lower limit using +01:00 offset + EXPECT_TRUE( + parse(RFC3339_sec, "-292277022657-01-27T09:29:52+01:00", utc, &tp)); + EXPECT_EQ(tp, time_point<absl::time_internal::cctz::seconds>::min()); + EXPECT_FALSE( + parse(RFC3339_sec, "-292277022657-01-27T08:29:51+01:00", utc, &tp)); + + // tests max/min civil-second overflow + EXPECT_FALSE( + parse(RFC3339_sec, "9223372036854775807-12-31T23:59:59-00:01", utc, &tp)); + EXPECT_FALSE(parse(RFC3339_sec, "-9223372036854775808-01-01T00:00:00+00:01", + utc, &tp)); + + // TODO: Add tests that parsing times with fractional seconds overflow + // appropriately. This can't be done until cctz::parse() properly detects + // overflow when combining the chrono seconds and femto. +} + +// +// Roundtrip test for format()/parse(). +// + +TEST(FormatParse, RoundTrip) { + time_zone lax; + EXPECT_TRUE(load_time_zone("America/Los_Angeles", &lax)); + const auto in = convert(civil_second(1977, 6, 28, 9, 8, 7), lax); + const auto subseconds = chrono::nanoseconds(654321); + + // RFC3339, which renders subseconds. + { + time_point<chrono::nanoseconds> out; + const std::string s = format(RFC3339_full, in + subseconds, lax); + EXPECT_TRUE(parse(RFC3339_full, s, lax, &out)) << s; + EXPECT_EQ(in + subseconds, out); // RFC3339_full includes %Ez + } + + // RFC1123, which only does whole seconds. + { + time_point<chrono::nanoseconds> out; + const std::string s = format(RFC1123_full, in, lax); + EXPECT_TRUE(parse(RFC1123_full, s, lax, &out)) << s; + EXPECT_EQ(in, out); // RFC1123_full includes %z + } + +#if defined(_WIN32) || defined(_WIN64) + // Initial investigations indicate the %c does not roundtrip on Windows. + // TODO: Figure out what is going on here (perhaps a locale problem). +#elif defined(__EMSCRIPTEN__) + // strftime() and strptime() use different defintions for "%c" under + // emscripten (see https://github.com/kripken/emscripten/pull/7491), + // causing its round-trip test to fail. +#else + // Even though we don't know what %c will produce, it should roundtrip, + // but only in the 0-offset timezone. + { + time_point<chrono::nanoseconds> out; + time_zone utc = utc_time_zone(); + const std::string s = format("%c", in, utc); + EXPECT_TRUE(parse("%c", s, utc, &out)) << s; + EXPECT_EQ(in, out); + } +#endif +} + +TEST(FormatParse, RoundTripDistantFuture) { + const time_zone utc = utc_time_zone(); + const time_point<absl::time_internal::cctz::seconds> in = + time_point<absl::time_internal::cctz::seconds>::max(); + const std::string s = format(RFC3339_full, in, utc); + time_point<absl::time_internal::cctz::seconds> out; + EXPECT_TRUE(parse(RFC3339_full, s, utc, &out)) << s; + EXPECT_EQ(in, out); +} + +TEST(FormatParse, RoundTripDistantPast) { + const time_zone utc = utc_time_zone(); + const time_point<absl::time_internal::cctz::seconds> in = + time_point<absl::time_internal::cctz::seconds>::min(); + const std::string s = format(RFC3339_full, in, utc); + time_point<absl::time_internal::cctz::seconds> out; + EXPECT_TRUE(parse(RFC3339_full, s, utc, &out)) << s; + EXPECT_EQ(in, out); +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_if.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_if.cc new file mode 100644 index 0000000000..0319b2f98e --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_if.cc @@ -0,0 +1,45 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "time_zone_if.h" + +#include "absl/base/config.h" +#include "time_zone_info.h" +#include "time_zone_libc.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +std::unique_ptr<TimeZoneIf> TimeZoneIf::Load(const std::string& name) { + // Support "libc:localtime" and "libc:*" to access the legacy + // localtime and UTC support respectively from the C library. + if (name.compare(0, 5, "libc:") == 0) { + return std::unique_ptr<TimeZoneIf>(new TimeZoneLibC(name.substr(5))); + } + + // Otherwise use the "zoneinfo" implementation by default. + std::unique_ptr<TimeZoneInfo> tz(new TimeZoneInfo); + if (!tz->Load(name)) tz.reset(); + return std::unique_ptr<TimeZoneIf>(tz.release()); +} + +// Defined out-of-line to avoid emitting a weak vtable in all TUs. +TimeZoneIf::~TimeZoneIf() {} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_if.h b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_if.h new file mode 100644 index 0000000000..32c0891c1e --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_if.h @@ -0,0 +1,76 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_ +#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_ + +#include <chrono> +#include <cstdint> +#include <memory> +#include <string> + +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +// A simple interface used to hide time-zone complexities from time_zone::Impl. +// Subclasses implement the functions for civil-time conversions in the zone. +class TimeZoneIf { + public: + // A factory function for TimeZoneIf implementations. + static std::unique_ptr<TimeZoneIf> Load(const std::string& name); + + virtual ~TimeZoneIf(); + + virtual time_zone::absolute_lookup BreakTime( + const time_point<seconds>& tp) const = 0; + virtual time_zone::civil_lookup MakeTime(const civil_second& cs) const = 0; + + virtual bool NextTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const = 0; + virtual bool PrevTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const = 0; + + virtual std::string Version() const = 0; + virtual std::string Description() const = 0; + + protected: + TimeZoneIf() {} +}; + +// Convert between time_point<seconds> and a count of seconds since the +// Unix epoch. We assume that the std::chrono::system_clock and the +// Unix clock are second aligned, but not that they share an epoch. +inline std::int_fast64_t ToUnixSeconds(const time_point<seconds>& tp) { + return (tp - std::chrono::time_point_cast<seconds>( + std::chrono::system_clock::from_time_t(0))) + .count(); +} +inline time_point<seconds> FromUnixSeconds(std::int_fast64_t t) { + return std::chrono::time_point_cast<seconds>( + std::chrono::system_clock::from_time_t(0)) + + seconds(t); +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_ diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_impl.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_impl.cc new file mode 100644 index 0000000000..030ae0e19e --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_impl.cc @@ -0,0 +1,121 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "time_zone_impl.h" + +#include <deque> +#include <mutex> +#include <string> +#include <unordered_map> +#include <utility> + +#include "absl/base/config.h" +#include "time_zone_fixed.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +namespace { + +// time_zone::Impls are linked into a map to support fast lookup by name. +using TimeZoneImplByName = + std::unordered_map<std::string, const time_zone::Impl*>; +TimeZoneImplByName* time_zone_map = nullptr; + +// Mutual exclusion for time_zone_map. +std::mutex& TimeZoneMutex() { + // This mutex is intentionally "leaked" to avoid the static deinitialization + // order fiasco (std::mutex's destructor is not trivial on many platforms). + static std::mutex* time_zone_mutex = new std::mutex; + return *time_zone_mutex; +} + +} // namespace + +time_zone time_zone::Impl::UTC() { return time_zone(UTCImpl()); } + +bool time_zone::Impl::LoadTimeZone(const std::string& name, time_zone* tz) { + const time_zone::Impl* const utc_impl = UTCImpl(); + + // First check for UTC (which is never a key in time_zone_map). + auto offset = seconds::zero(); + if (FixedOffsetFromName(name, &offset) && offset == seconds::zero()) { + *tz = time_zone(utc_impl); + return true; + } + + // Then check, under a shared lock, whether the time zone has already + // been loaded. This is the common path. TODO: Move to shared_mutex. + { + std::lock_guard<std::mutex> lock(TimeZoneMutex()); + if (time_zone_map != nullptr) { + TimeZoneImplByName::const_iterator itr = time_zone_map->find(name); + if (itr != time_zone_map->end()) { + *tz = time_zone(itr->second); + return itr->second != utc_impl; + } + } + } + + // Now check again, under an exclusive lock. + std::lock_guard<std::mutex> lock(TimeZoneMutex()); + if (time_zone_map == nullptr) time_zone_map = new TimeZoneImplByName; + const Impl*& impl = (*time_zone_map)[name]; + if (impl == nullptr) { + // The first thread in loads the new time zone. + Impl* new_impl = new Impl(name); + new_impl->zone_ = TimeZoneIf::Load(new_impl->name_); + if (new_impl->zone_ == nullptr) { + delete new_impl; // free the nascent Impl + impl = utc_impl; // and fallback to UTC + } else { + impl = new_impl; // install new time zone + } + } + *tz = time_zone(impl); + return impl != utc_impl; +} + +void time_zone::Impl::ClearTimeZoneMapTestOnly() { + std::lock_guard<std::mutex> lock(TimeZoneMutex()); + if (time_zone_map != nullptr) { + // Existing time_zone::Impl* entries are in the wild, so we can't delete + // them. Instead, we move them to a private container, where they are + // logically unreachable but not "leaked". Future requests will result + // in reloading the data. + static auto* cleared = new std::deque<const time_zone::Impl*>; + for (const auto& element : *time_zone_map) { + cleared->push_back(element.second); + } + time_zone_map->clear(); + } +} + +time_zone::Impl::Impl(const std::string& name) : name_(name) {} + +const time_zone::Impl* time_zone::Impl::UTCImpl() { + static Impl* utc_impl = [] { + Impl* impl = new Impl("UTC"); + impl->zone_ = TimeZoneIf::Load(impl->name_); // never fails + return impl; + }(); + return utc_impl; +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_impl.h b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_impl.h new file mode 100644 index 0000000000..69806c10d9 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_impl.h @@ -0,0 +1,93 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IMPL_H_ +#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IMPL_H_ + +#include <memory> +#include <string> + +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" +#include "time_zone_if.h" +#include "time_zone_info.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +// time_zone::Impl is the internal object referenced by a cctz::time_zone. +class time_zone::Impl { + public: + // The UTC time zone. Also used for other time zones that fail to load. + static time_zone UTC(); + + // Load a named time zone. Returns false if the name is invalid, or if + // some other kind of error occurs. Note that loading "UTC" never fails. + static bool LoadTimeZone(const std::string& name, time_zone* tz); + + // Clears the map of cached time zones. Primarily for use in benchmarks + // that gauge the performance of loading/parsing the time-zone data. + static void ClearTimeZoneMapTestOnly(); + + // The primary key is the time-zone ID (e.g., "America/New_York"). + const std::string& Name() const { + // TODO: It would nice if the zoneinfo data included the zone name. + return name_; + } + + // Breaks a time_point down to civil-time components in this time zone. + time_zone::absolute_lookup BreakTime(const time_point<seconds>& tp) const { + return zone_->BreakTime(tp); + } + + // Converts the civil-time components in this time zone into a time_point. + // That is, the opposite of BreakTime(). The requested civil time may be + // ambiguous or illegal due to a change of UTC offset. + time_zone::civil_lookup MakeTime(const civil_second& cs) const { + return zone_->MakeTime(cs); + } + + // Finds the time of the next/previous offset change in this time zone. + bool NextTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const { + return zone_->NextTransition(tp, trans); + } + bool PrevTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const { + return zone_->PrevTransition(tp, trans); + } + + // Returns an implementation-defined version std::string for this time zone. + std::string Version() const { return zone_->Version(); } + + // Returns an implementation-defined description of this time zone. + std::string Description() const { return zone_->Description(); } + + private: + explicit Impl(const std::string& name); + static const Impl* UTCImpl(); + + const std::string name_; + std::unique_ptr<TimeZoneIf> zone_; +}; + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IMPL_H_ diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.cc new file mode 100644 index 0000000000..f1697cdf04 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.cc @@ -0,0 +1,958 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// This file implements the TimeZoneIf interface using the "zoneinfo" +// data provided by the IANA Time Zone Database (i.e., the only real game +// in town). +// +// TimeZoneInfo represents the history of UTC-offset changes within a time +// zone. Most changes are due to daylight-saving rules, but occasionally +// shifts are made to the time-zone's base offset. The database only attempts +// to be definitive for times since 1970, so be wary of local-time conversions +// before that. Also, rule and zone-boundary changes are made at the whim +// of governments, so the conversion of future times needs to be taken with +// a grain of salt. +// +// For more information see tzfile(5), http://www.iana.org/time-zones, or +// https://en.wikipedia.org/wiki/Zoneinfo. +// +// Note that we assume the proleptic Gregorian calendar and 60-second +// minutes throughout. + +#include "time_zone_info.h" + +#include <algorithm> +#include <cassert> +#include <chrono> +#include <cstdint> +#include <cstdio> +#include <cstdlib> +#include <cstring> +#include <functional> +#include <iostream> +#include <memory> +#include <sstream> +#include <string> + +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "time_zone_fixed.h" +#include "time_zone_posix.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +namespace { + +inline bool IsLeap(year_t year) { + return (year % 4) == 0 && ((year % 100) != 0 || (year % 400) == 0); +} + +// The number of days in non-leap and leap years respectively. +const std::int_least32_t kDaysPerYear[2] = {365, 366}; + +// The day offsets of the beginning of each (1-based) month in non-leap and +// leap years respectively (e.g., 335 days before December in a leap year). +const std::int_least16_t kMonthOffsets[2][1 + 12 + 1] = { + {-1, 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}, + {-1, 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}, +}; + +// We reject leap-second encoded zoneinfo and so assume 60-second minutes. +const std::int_least32_t kSecsPerDay = 24 * 60 * 60; + +// 400-year chunks always have 146097 days (20871 weeks). +const std::int_least64_t kSecsPer400Years = 146097LL * kSecsPerDay; + +// Like kDaysPerYear[] but scaled up by a factor of kSecsPerDay. +const std::int_least32_t kSecsPerYear[2] = { + 365 * kSecsPerDay, + 366 * kSecsPerDay, +}; + +// Single-byte, unsigned numeric values are encoded directly. +inline std::uint_fast8_t Decode8(const char* cp) { + return static_cast<std::uint_fast8_t>(*cp) & 0xff; +} + +// Multi-byte, numeric values are encoded using a MSB first, +// twos-complement representation. These helpers decode, from +// the given address, 4-byte and 8-byte values respectively. +// Note: If int_fastXX_t == intXX_t and this machine is not +// twos complement, then there will be at least one input value +// we cannot represent. +std::int_fast32_t Decode32(const char* cp) { + std::uint_fast32_t v = 0; + for (int i = 0; i != (32 / 8); ++i) v = (v << 8) | Decode8(cp++); + const std::int_fast32_t s32max = 0x7fffffff; + const auto s32maxU = static_cast<std::uint_fast32_t>(s32max); + if (v <= s32maxU) return static_cast<std::int_fast32_t>(v); + return static_cast<std::int_fast32_t>(v - s32maxU - 1) - s32max - 1; +} + +std::int_fast64_t Decode64(const char* cp) { + std::uint_fast64_t v = 0; + for (int i = 0; i != (64 / 8); ++i) v = (v << 8) | Decode8(cp++); + const std::int_fast64_t s64max = 0x7fffffffffffffff; + const auto s64maxU = static_cast<std::uint_fast64_t>(s64max); + if (v <= s64maxU) return static_cast<std::int_fast64_t>(v); + return static_cast<std::int_fast64_t>(v - s64maxU - 1) - s64max - 1; +} + +// Generate a year-relative offset for a PosixTransition. +std::int_fast64_t TransOffset(bool leap_year, int jan1_weekday, + const PosixTransition& pt) { + std::int_fast64_t days = 0; + switch (pt.date.fmt) { + case PosixTransition::J: { + days = pt.date.j.day; + if (!leap_year || days < kMonthOffsets[1][3]) days -= 1; + break; + } + case PosixTransition::N: { + days = pt.date.n.day; + break; + } + case PosixTransition::M: { + const bool last_week = (pt.date.m.week == 5); + days = kMonthOffsets[leap_year][pt.date.m.month + last_week]; + const std::int_fast64_t weekday = (jan1_weekday + days) % 7; + if (last_week) { + days -= (weekday + 7 - 1 - pt.date.m.weekday) % 7 + 1; + } else { + days += (pt.date.m.weekday + 7 - weekday) % 7; + days += (pt.date.m.week - 1) * 7; + } + break; + } + } + return (days * kSecsPerDay) + pt.time.offset; +} + +inline time_zone::civil_lookup MakeUnique(const time_point<seconds>& tp) { + time_zone::civil_lookup cl; + cl.kind = time_zone::civil_lookup::UNIQUE; + cl.pre = cl.trans = cl.post = tp; + return cl; +} + +inline time_zone::civil_lookup MakeUnique(std::int_fast64_t unix_time) { + return MakeUnique(FromUnixSeconds(unix_time)); +} + +inline time_zone::civil_lookup MakeSkipped(const Transition& tr, + const civil_second& cs) { + time_zone::civil_lookup cl; + cl.kind = time_zone::civil_lookup::SKIPPED; + cl.pre = FromUnixSeconds(tr.unix_time - 1 + (cs - tr.prev_civil_sec)); + cl.trans = FromUnixSeconds(tr.unix_time); + cl.post = FromUnixSeconds(tr.unix_time - (tr.civil_sec - cs)); + return cl; +} + +inline time_zone::civil_lookup MakeRepeated(const Transition& tr, + const civil_second& cs) { + time_zone::civil_lookup cl; + cl.kind = time_zone::civil_lookup::REPEATED; + cl.pre = FromUnixSeconds(tr.unix_time - 1 - (tr.prev_civil_sec - cs)); + cl.trans = FromUnixSeconds(tr.unix_time); + cl.post = FromUnixSeconds(tr.unix_time + (cs - tr.civil_sec)); + return cl; +} + +inline civil_second YearShift(const civil_second& cs, year_t shift) { + return civil_second(cs.year() + shift, cs.month(), cs.day(), cs.hour(), + cs.minute(), cs.second()); +} + +} // namespace + +// What (no leap-seconds) UTC+seconds zoneinfo would look like. +bool TimeZoneInfo::ResetToBuiltinUTC(const seconds& offset) { + transition_types_.resize(1); + TransitionType& tt(transition_types_.back()); + tt.utc_offset = static_cast<std::int_least32_t>(offset.count()); + tt.is_dst = false; + tt.abbr_index = 0; + + // We temporarily add some redundant, contemporary (2013 through 2023) + // transitions for performance reasons. See TimeZoneInfo::LocalTime(). + // TODO: Fix the performance issue and remove the extra transitions. + transitions_.clear(); + transitions_.reserve(12); + for (const std::int_fast64_t unix_time : { + -(1LL << 59), // BIG_BANG + 1356998400LL, // 2013-01-01T00:00:00+00:00 + 1388534400LL, // 2014-01-01T00:00:00+00:00 + 1420070400LL, // 2015-01-01T00:00:00+00:00 + 1451606400LL, // 2016-01-01T00:00:00+00:00 + 1483228800LL, // 2017-01-01T00:00:00+00:00 + 1514764800LL, // 2018-01-01T00:00:00+00:00 + 1546300800LL, // 2019-01-01T00:00:00+00:00 + 1577836800LL, // 2020-01-01T00:00:00+00:00 + 1609459200LL, // 2021-01-01T00:00:00+00:00 + 1640995200LL, // 2022-01-01T00:00:00+00:00 + 1672531200LL, // 2023-01-01T00:00:00+00:00 + 2147483647LL, // 2^31 - 1 + }) { + Transition& tr(*transitions_.emplace(transitions_.end())); + tr.unix_time = unix_time; + tr.type_index = 0; + tr.civil_sec = LocalTime(tr.unix_time, tt).cs; + tr.prev_civil_sec = tr.civil_sec - 1; + } + + default_transition_type_ = 0; + abbreviations_ = FixedOffsetToAbbr(offset); + abbreviations_.append(1, '\0'); // add NUL + future_spec_.clear(); // never needed for a fixed-offset zone + extended_ = false; + + tt.civil_max = LocalTime(seconds::max().count(), tt).cs; + tt.civil_min = LocalTime(seconds::min().count(), tt).cs; + + transitions_.shrink_to_fit(); + return true; +} + +// Builds the in-memory header using the raw bytes from the file. +bool TimeZoneInfo::Header::Build(const tzhead& tzh) { + std::int_fast32_t v; + if ((v = Decode32(tzh.tzh_timecnt)) < 0) return false; + timecnt = static_cast<std::size_t>(v); + if ((v = Decode32(tzh.tzh_typecnt)) < 0) return false; + typecnt = static_cast<std::size_t>(v); + if ((v = Decode32(tzh.tzh_charcnt)) < 0) return false; + charcnt = static_cast<std::size_t>(v); + if ((v = Decode32(tzh.tzh_leapcnt)) < 0) return false; + leapcnt = static_cast<std::size_t>(v); + if ((v = Decode32(tzh.tzh_ttisstdcnt)) < 0) return false; + ttisstdcnt = static_cast<std::size_t>(v); + if ((v = Decode32(tzh.tzh_ttisutcnt)) < 0) return false; + ttisutcnt = static_cast<std::size_t>(v); + return true; +} + +// How many bytes of data are associated with this header. The result +// depends upon whether this is a section with 4-byte or 8-byte times. +std::size_t TimeZoneInfo::Header::DataLength(std::size_t time_len) const { + std::size_t len = 0; + len += (time_len + 1) * timecnt; // unix_time + type_index + len += (4 + 1 + 1) * typecnt; // utc_offset + is_dst + abbr_index + len += 1 * charcnt; // abbreviations + len += (time_len + 4) * leapcnt; // leap-time + TAI-UTC + len += 1 * ttisstdcnt; // UTC/local indicators + len += 1 * ttisutcnt; // standard/wall indicators + return len; +} + +// Check that the TransitionType has the expected offset/is_dst/abbreviation. +void TimeZoneInfo::CheckTransition(const std::string& name, + const TransitionType& tt, + std::int_fast32_t offset, bool is_dst, + const std::string& abbr) const { + if (tt.utc_offset != offset || tt.is_dst != is_dst || + &abbreviations_[tt.abbr_index] != abbr) { + std::clog << name << ": Transition" + << " offset=" << tt.utc_offset << "/" + << (tt.is_dst ? "DST" : "STD") + << "/abbr=" << &abbreviations_[tt.abbr_index] + << " does not match POSIX spec '" << future_spec_ << "'\n"; + } +} + +// zic(8) can generate no-op transitions when a zone changes rules at an +// instant when there is actually no discontinuity. So we check whether +// two transitions have equivalent types (same offset/is_dst/abbr). +bool TimeZoneInfo::EquivTransitions(std::uint_fast8_t tt1_index, + std::uint_fast8_t tt2_index) const { + if (tt1_index == tt2_index) return true; + const TransitionType& tt1(transition_types_[tt1_index]); + const TransitionType& tt2(transition_types_[tt2_index]); + if (tt1.is_dst != tt2.is_dst) return false; + if (tt1.utc_offset != tt2.utc_offset) return false; + if (tt1.abbr_index != tt2.abbr_index) return false; + return true; +} + +// Use the POSIX-TZ-environment-variable-style string to handle times +// in years after the last transition stored in the zoneinfo data. +void TimeZoneInfo::ExtendTransitions(const std::string& name, + const Header& hdr) { + extended_ = false; + bool extending = !future_spec_.empty(); + + PosixTimeZone posix; + if (extending && !ParsePosixSpec(future_spec_, &posix)) { + std::clog << name << ": Failed to parse '" << future_spec_ << "'\n"; + extending = false; + } + + if (extending && posix.dst_abbr.empty()) { // std only + // The future specification should match the last/default transition, + // and that means that handling the future will fall out naturally. + std::uint_fast8_t index = default_transition_type_; + if (hdr.timecnt != 0) index = transitions_[hdr.timecnt - 1].type_index; + const TransitionType& tt(transition_types_[index]); + CheckTransition(name, tt, posix.std_offset, false, posix.std_abbr); + extending = false; + } + + if (extending && hdr.timecnt < 2) { + std::clog << name << ": Too few transitions for POSIX spec\n"; + extending = false; + } + + if (!extending) { + // Ensure that there is always a transition in the second half of the + // time line (the BIG_BANG transition is in the first half) so that the + // signed difference between a civil_second and the civil_second of its + // previous transition is always representable, without overflow. + const Transition& last(transitions_.back()); + if (last.unix_time < 0) { + const std::uint_fast8_t type_index = last.type_index; + Transition& tr(*transitions_.emplace(transitions_.end())); + tr.unix_time = 2147483647; // 2038-01-19T03:14:07+00:00 + tr.type_index = type_index; + } + return; // last transition wins + } + + // Extend the transitions for an additional 400 years using the + // future specification. Years beyond those can be handled by + // mapping back to a cycle-equivalent year within that range. + // zic(8) should probably do this so that we don't have to. + // TODO: Reduce the extension by the number of compatible + // transitions already in place. + transitions_.reserve(hdr.timecnt + 400 * 2 + 1); + transitions_.resize(hdr.timecnt + 400 * 2); + extended_ = true; + + // The future specification should match the last two transitions, + // and those transitions should have different is_dst flags. Note + // that nothing says the UTC offset used by the is_dst transition + // must be greater than that used by the !is_dst transition. (See + // Europe/Dublin, for example.) + const Transition* tr0 = &transitions_[hdr.timecnt - 1]; + const Transition* tr1 = &transitions_[hdr.timecnt - 2]; + const TransitionType* tt0 = &transition_types_[tr0->type_index]; + const TransitionType* tt1 = &transition_types_[tr1->type_index]; + const TransitionType& dst(tt0->is_dst ? *tt0 : *tt1); + const TransitionType& std(tt0->is_dst ? *tt1 : *tt0); + CheckTransition(name, dst, posix.dst_offset, true, posix.dst_abbr); + CheckTransition(name, std, posix.std_offset, false, posix.std_abbr); + + // Add the transitions to tr1 and back to tr0 for each extra year. + last_year_ = LocalTime(tr0->unix_time, *tt0).cs.year(); + bool leap_year = IsLeap(last_year_); + const civil_day jan1(last_year_, 1, 1); + std::int_fast64_t jan1_time = civil_second(jan1) - civil_second(); + int jan1_weekday = (static_cast<int>(get_weekday(jan1)) + 1) % 7; + Transition* tr = &transitions_[hdr.timecnt]; // next trans to fill + if (LocalTime(tr1->unix_time, *tt1).cs.year() != last_year_) { + // Add a single extra transition to align to a calendar year. + transitions_.resize(transitions_.size() + 1); + assert(tr == &transitions_[hdr.timecnt]); // no reallocation + const PosixTransition& pt1(tt0->is_dst ? posix.dst_end : posix.dst_start); + std::int_fast64_t tr1_offset = TransOffset(leap_year, jan1_weekday, pt1); + tr->unix_time = jan1_time + tr1_offset - tt0->utc_offset; + tr++->type_index = tr1->type_index; + tr0 = &transitions_[hdr.timecnt]; + tr1 = &transitions_[hdr.timecnt - 1]; + tt0 = &transition_types_[tr0->type_index]; + tt1 = &transition_types_[tr1->type_index]; + } + const PosixTransition& pt1(tt0->is_dst ? posix.dst_end : posix.dst_start); + const PosixTransition& pt0(tt0->is_dst ? posix.dst_start : posix.dst_end); + for (const year_t limit = last_year_ + 400; last_year_ < limit;) { + last_year_ += 1; // an additional year of generated transitions + jan1_time += kSecsPerYear[leap_year]; + jan1_weekday = (jan1_weekday + kDaysPerYear[leap_year]) % 7; + leap_year = !leap_year && IsLeap(last_year_); + std::int_fast64_t tr1_offset = TransOffset(leap_year, jan1_weekday, pt1); + tr->unix_time = jan1_time + tr1_offset - tt0->utc_offset; + tr++->type_index = tr1->type_index; + std::int_fast64_t tr0_offset = TransOffset(leap_year, jan1_weekday, pt0); + tr->unix_time = jan1_time + tr0_offset - tt1->utc_offset; + tr++->type_index = tr0->type_index; + } + assert(tr == &transitions_[0] + transitions_.size()); +} + +bool TimeZoneInfo::Load(const std::string& name, ZoneInfoSource* zip) { + // Read and validate the header. + tzhead tzh; + if (zip->Read(&tzh, sizeof(tzh)) != sizeof(tzh)) return false; + if (strncmp(tzh.tzh_magic, TZ_MAGIC, sizeof(tzh.tzh_magic)) != 0) + return false; + Header hdr; + if (!hdr.Build(tzh)) return false; + std::size_t time_len = 4; + if (tzh.tzh_version[0] != '\0') { + // Skip the 4-byte data. + if (zip->Skip(hdr.DataLength(time_len)) != 0) return false; + // Read and validate the header for the 8-byte data. + if (zip->Read(&tzh, sizeof(tzh)) != sizeof(tzh)) return false; + if (strncmp(tzh.tzh_magic, TZ_MAGIC, sizeof(tzh.tzh_magic)) != 0) + return false; + if (tzh.tzh_version[0] == '\0') return false; + if (!hdr.Build(tzh)) return false; + time_len = 8; + } + if (hdr.typecnt == 0) return false; + if (hdr.leapcnt != 0) { + // This code assumes 60-second minutes so we do not want + // the leap-second encoded zoneinfo. We could reverse the + // compensation, but the "right" encoding is rarely used + // so currently we simply reject such data. + return false; + } + if (hdr.ttisstdcnt != 0 && hdr.ttisstdcnt != hdr.typecnt) return false; + if (hdr.ttisutcnt != 0 && hdr.ttisutcnt != hdr.typecnt) return false; + + // Read the data into a local buffer. + std::size_t len = hdr.DataLength(time_len); + std::vector<char> tbuf(len); + if (zip->Read(tbuf.data(), len) != len) return false; + const char* bp = tbuf.data(); + + // Decode and validate the transitions. + transitions_.reserve(hdr.timecnt + 2); // We might add a couple. + transitions_.resize(hdr.timecnt); + for (std::size_t i = 0; i != hdr.timecnt; ++i) { + transitions_[i].unix_time = (time_len == 4) ? Decode32(bp) : Decode64(bp); + bp += time_len; + if (i != 0) { + // Check that the transitions are ordered by time (as zic guarantees). + if (!Transition::ByUnixTime()(transitions_[i - 1], transitions_[i])) + return false; // out of order + } + } + bool seen_type_0 = false; + for (std::size_t i = 0; i != hdr.timecnt; ++i) { + transitions_[i].type_index = Decode8(bp++); + if (transitions_[i].type_index >= hdr.typecnt) return false; + if (transitions_[i].type_index == 0) seen_type_0 = true; + } + + // Decode and validate the transition types. + transition_types_.resize(hdr.typecnt); + for (std::size_t i = 0; i != hdr.typecnt; ++i) { + transition_types_[i].utc_offset = + static_cast<std::int_least32_t>(Decode32(bp)); + if (transition_types_[i].utc_offset >= kSecsPerDay || + transition_types_[i].utc_offset <= -kSecsPerDay) + return false; + bp += 4; + transition_types_[i].is_dst = (Decode8(bp++) != 0); + transition_types_[i].abbr_index = Decode8(bp++); + if (transition_types_[i].abbr_index >= hdr.charcnt) return false; + } + + // Determine the before-first-transition type. + default_transition_type_ = 0; + if (seen_type_0 && hdr.timecnt != 0) { + std::uint_fast8_t index = 0; + if (transition_types_[0].is_dst) { + index = transitions_[0].type_index; + while (index != 0 && transition_types_[index].is_dst) --index; + } + while (index != hdr.typecnt && transition_types_[index].is_dst) ++index; + if (index != hdr.typecnt) default_transition_type_ = index; + } + + // Copy all the abbreviations. + abbreviations_.assign(bp, hdr.charcnt); + bp += hdr.charcnt; + + // Skip the unused portions. We've already dispensed with leap-second + // encoded zoneinfo. The ttisstd/ttisgmt indicators only apply when + // interpreting a POSIX spec that does not include start/end rules, and + // that isn't the case here (see "zic -p"). + bp += (8 + 4) * hdr.leapcnt; // leap-time + TAI-UTC + bp += 1 * hdr.ttisstdcnt; // UTC/local indicators + bp += 1 * hdr.ttisutcnt; // standard/wall indicators + assert(bp == tbuf.data() + tbuf.size()); + + future_spec_.clear(); + if (tzh.tzh_version[0] != '\0') { + // Snarf up the NL-enclosed future POSIX spec. Note + // that version '3' files utilize an extended format. + auto get_char = [](ZoneInfoSource* azip) -> int { + unsigned char ch; // all non-EOF results are positive + return (azip->Read(&ch, 1) == 1) ? ch : EOF; + }; + if (get_char(zip) != '\n') return false; + for (int c = get_char(zip); c != '\n'; c = get_char(zip)) { + if (c == EOF) return false; + future_spec_.push_back(static_cast<char>(c)); + } + } + + // We don't check for EOF so that we're forwards compatible. + + // If we did not find version information during the standard loading + // process (as of tzh_version '3' that is unsupported), then ask the + // ZoneInfoSource for any out-of-bound version std::string it may be privy to. + if (version_.empty()) { + version_ = zip->Version(); + } + + // Trim redundant transitions. zic may have added these to work around + // differences between the glibc and reference implementations (see + // zic.c:dontmerge) and the Qt library (see zic.c:WORK_AROUND_QTBUG_53071). + // For us, they just get in the way when we do future_spec_ extension. + while (hdr.timecnt > 1) { + if (!EquivTransitions(transitions_[hdr.timecnt - 1].type_index, + transitions_[hdr.timecnt - 2].type_index)) { + break; + } + hdr.timecnt -= 1; + } + transitions_.resize(hdr.timecnt); + + // Ensure that there is always a transition in the first half of the + // time line (the second half is handled in ExtendTransitions()) so that + // the signed difference between a civil_second and the civil_second of + // its previous transition is always representable, without overflow. + // A contemporary zic will usually have already done this for us. + if (transitions_.empty() || transitions_.front().unix_time >= 0) { + Transition& tr(*transitions_.emplace(transitions_.begin())); + tr.unix_time = -(1LL << 59); // see tz/zic.c "BIG_BANG" + tr.type_index = default_transition_type_; + hdr.timecnt += 1; + } + + // Extend the transitions using the future specification. + ExtendTransitions(name, hdr); + + // Compute the local civil time for each transition and the preceding + // second. These will be used for reverse conversions in MakeTime(). + const TransitionType* ttp = &transition_types_[default_transition_type_]; + for (std::size_t i = 0; i != transitions_.size(); ++i) { + Transition& tr(transitions_[i]); + tr.prev_civil_sec = LocalTime(tr.unix_time, *ttp).cs - 1; + ttp = &transition_types_[tr.type_index]; + tr.civil_sec = LocalTime(tr.unix_time, *ttp).cs; + if (i != 0) { + // Check that the transitions are ordered by civil time. Essentially + // this means that an offset change cannot cross another such change. + // No one does this in practice, and we depend on it in MakeTime(). + if (!Transition::ByCivilTime()(transitions_[i - 1], tr)) + return false; // out of order + } + } + + // Compute the maximum/minimum civil times that can be converted to a + // time_point<seconds> for each of the zone's transition types. + for (auto& tt : transition_types_) { + tt.civil_max = LocalTime(seconds::max().count(), tt).cs; + tt.civil_min = LocalTime(seconds::min().count(), tt).cs; + } + + transitions_.shrink_to_fit(); + return true; +} + +namespace { + +// fopen(3) adaptor. +inline FILE* FOpen(const char* path, const char* mode) { +#if defined(_MSC_VER) + FILE* fp; + if (fopen_s(&fp, path, mode) != 0) fp = nullptr; + return fp; +#else + return fopen(path, mode); // TODO: Enable the close-on-exec flag. +#endif +} + +// A stdio(3)-backed implementation of ZoneInfoSource. +class FileZoneInfoSource : public ZoneInfoSource { + public: + static std::unique_ptr<ZoneInfoSource> Open(const std::string& name); + + std::size_t Read(void* ptr, std::size_t size) override { + size = std::min(size, len_); + std::size_t nread = fread(ptr, 1, size, fp_.get()); + len_ -= nread; + return nread; + } + int Skip(std::size_t offset) override { + offset = std::min(offset, len_); + int rc = fseek(fp_.get(), static_cast<long>(offset), SEEK_CUR); + if (rc == 0) len_ -= offset; + return rc; + } + std::string Version() const override { + // TODO: It would nice if the zoneinfo data included the tzdb version. + return std::string(); + } + + protected: + explicit FileZoneInfoSource( + FILE* fp, std::size_t len = std::numeric_limits<std::size_t>::max()) + : fp_(fp, fclose), len_(len) {} + + private: + std::unique_ptr<FILE, int (*)(FILE*)> fp_; + std::size_t len_; +}; + +std::unique_ptr<ZoneInfoSource> FileZoneInfoSource::Open( + const std::string& name) { + // Use of the "file:" prefix is intended for testing purposes only. + const std::size_t pos = (name.compare(0, 5, "file:") == 0) ? 5 : 0; + + // Map the time-zone name to a path name. + std::string path; + if (pos == name.size() || name[pos] != '/') { + const char* tzdir = "/usr/share/zoneinfo"; + char* tzdir_env = nullptr; +#if defined(_MSC_VER) + _dupenv_s(&tzdir_env, nullptr, "TZDIR"); +#else + tzdir_env = std::getenv("TZDIR"); +#endif + if (tzdir_env && *tzdir_env) tzdir = tzdir_env; + path += tzdir; + path += '/'; +#if defined(_MSC_VER) + free(tzdir_env); +#endif + } + path.append(name, pos, std::string::npos); + + // Open the zoneinfo file. + FILE* fp = FOpen(path.c_str(), "rb"); + if (fp == nullptr) return nullptr; + std::size_t length = 0; + if (fseek(fp, 0, SEEK_END) == 0) { + long offset = ftell(fp); + if (offset >= 0) { + length = static_cast<std::size_t>(offset); + } + rewind(fp); + } + return std::unique_ptr<ZoneInfoSource>(new FileZoneInfoSource(fp, length)); +} + +class AndroidZoneInfoSource : public FileZoneInfoSource { + public: + static std::unique_ptr<ZoneInfoSource> Open(const std::string& name); + std::string Version() const override { return version_; } + + private: + explicit AndroidZoneInfoSource(FILE* fp, std::size_t len, const char* vers) + : FileZoneInfoSource(fp, len), version_(vers) {} + std::string version_; +}; + +std::unique_ptr<ZoneInfoSource> AndroidZoneInfoSource::Open( + const std::string& name) { + // Use of the "file:" prefix is intended for testing purposes only. + const std::size_t pos = (name.compare(0, 5, "file:") == 0) ? 5 : 0; + + // See Android's libc/tzcode/bionic.cpp for additional information. + for (const char* tzdata : {"/data/misc/zoneinfo/current/tzdata", + "/system/usr/share/zoneinfo/tzdata"}) { + std::unique_ptr<FILE, int (*)(FILE*)> fp(FOpen(tzdata, "rb"), fclose); + if (fp.get() == nullptr) continue; + + char hbuf[24]; // covers header.zonetab_offset too + if (fread(hbuf, 1, sizeof(hbuf), fp.get()) != sizeof(hbuf)) continue; + if (strncmp(hbuf, "tzdata", 6) != 0) continue; + const char* vers = (hbuf[11] == '\0') ? hbuf + 6 : ""; + const std::int_fast32_t index_offset = Decode32(hbuf + 12); + const std::int_fast32_t data_offset = Decode32(hbuf + 16); + if (index_offset < 0 || data_offset < index_offset) continue; + if (fseek(fp.get(), static_cast<long>(index_offset), SEEK_SET) != 0) + continue; + + char ebuf[52]; // covers entry.unused too + const std::size_t index_size = + static_cast<std::size_t>(data_offset - index_offset); + const std::size_t zonecnt = index_size / sizeof(ebuf); + if (zonecnt * sizeof(ebuf) != index_size) continue; + for (std::size_t i = 0; i != zonecnt; ++i) { + if (fread(ebuf, 1, sizeof(ebuf), fp.get()) != sizeof(ebuf)) break; + const std::int_fast32_t start = data_offset + Decode32(ebuf + 40); + const std::int_fast32_t length = Decode32(ebuf + 44); + if (start < 0 || length < 0) break; + ebuf[40] = '\0'; // ensure zone name is NUL terminated + if (strcmp(name.c_str() + pos, ebuf) == 0) { + if (fseek(fp.get(), static_cast<long>(start), SEEK_SET) != 0) break; + return std::unique_ptr<ZoneInfoSource>(new AndroidZoneInfoSource( + fp.release(), static_cast<std::size_t>(length), vers)); + } + } + } + + return nullptr; +} + +} // namespace + +bool TimeZoneInfo::Load(const std::string& name) { + // We can ensure that the loading of UTC or any other fixed-offset + // zone never fails because the simple, fixed-offset state can be + // internally generated. Note that this depends on our choice to not + // accept leap-second encoded ("right") zoneinfo. + auto offset = seconds::zero(); + if (FixedOffsetFromName(name, &offset)) { + return ResetToBuiltinUTC(offset); + } + + // Find and use a ZoneInfoSource to load the named zone. + auto zip = cctz_extension::zone_info_source_factory( + name, [](const std::string& name) -> std::unique_ptr<ZoneInfoSource> { + if (auto zip = FileZoneInfoSource::Open(name)) return zip; + if (auto zip = AndroidZoneInfoSource::Open(name)) return zip; + return nullptr; + }); + return zip != nullptr && Load(name, zip.get()); +} + +// BreakTime() translation for a particular transition type. +time_zone::absolute_lookup TimeZoneInfo::LocalTime( + std::int_fast64_t unix_time, const TransitionType& tt) const { + // A civil time in "+offset" looks like (time+offset) in UTC. + // Note: We perform two additions in the civil_second domain to + // sidestep the chance of overflow in (unix_time + tt.utc_offset). + return {(civil_second() + unix_time) + tt.utc_offset, tt.utc_offset, + tt.is_dst, &abbreviations_[tt.abbr_index]}; +} + +// BreakTime() translation for a particular transition. +time_zone::absolute_lookup TimeZoneInfo::LocalTime(std::int_fast64_t unix_time, + const Transition& tr) const { + const TransitionType& tt = transition_types_[tr.type_index]; + // Note: (unix_time - tr.unix_time) will never overflow as we + // have ensured that there is always a "nearby" transition. + return {tr.civil_sec + (unix_time - tr.unix_time), // TODO: Optimize. + tt.utc_offset, tt.is_dst, &abbreviations_[tt.abbr_index]}; +} + +// MakeTime() translation with a conversion-preserving +N * 400-year shift. +time_zone::civil_lookup TimeZoneInfo::TimeLocal(const civil_second& cs, + year_t c4_shift) const { + assert(last_year_ - 400 < cs.year() && cs.year() <= last_year_); + time_zone::civil_lookup cl = MakeTime(cs); + if (c4_shift > seconds::max().count() / kSecsPer400Years) { + cl.pre = cl.trans = cl.post = time_point<seconds>::max(); + } else { + const auto offset = seconds(c4_shift * kSecsPer400Years); + const auto limit = time_point<seconds>::max() - offset; + for (auto* tp : {&cl.pre, &cl.trans, &cl.post}) { + if (*tp > limit) { + *tp = time_point<seconds>::max(); + } else { + *tp += offset; + } + } + } + return cl; +} + +time_zone::absolute_lookup TimeZoneInfo::BreakTime( + const time_point<seconds>& tp) const { + std::int_fast64_t unix_time = ToUnixSeconds(tp); + const std::size_t timecnt = transitions_.size(); + assert(timecnt != 0); // We always add a transition. + + if (unix_time < transitions_[0].unix_time) { + return LocalTime(unix_time, transition_types_[default_transition_type_]); + } + if (unix_time >= transitions_[timecnt - 1].unix_time) { + // After the last transition. If we extended the transitions using + // future_spec_, shift back to a supported year using the 400-year + // cycle of calendaric equivalence and then compensate accordingly. + if (extended_) { + const std::int_fast64_t diff = + unix_time - transitions_[timecnt - 1].unix_time; + const year_t shift = diff / kSecsPer400Years + 1; + const auto d = seconds(shift * kSecsPer400Years); + time_zone::absolute_lookup al = BreakTime(tp - d); + al.cs = YearShift(al.cs, shift * 400); + return al; + } + return LocalTime(unix_time, transitions_[timecnt - 1]); + } + + const std::size_t hint = local_time_hint_.load(std::memory_order_relaxed); + if (0 < hint && hint < timecnt) { + if (transitions_[hint - 1].unix_time <= unix_time) { + if (unix_time < transitions_[hint].unix_time) { + return LocalTime(unix_time, transitions_[hint - 1]); + } + } + } + + const Transition target = {unix_time, 0, civil_second(), civil_second()}; + const Transition* begin = &transitions_[0]; + const Transition* tr = std::upper_bound(begin, begin + timecnt, target, + Transition::ByUnixTime()); + local_time_hint_.store(static_cast<std::size_t>(tr - begin), + std::memory_order_relaxed); + return LocalTime(unix_time, *--tr); +} + +time_zone::civil_lookup TimeZoneInfo::MakeTime(const civil_second& cs) const { + const std::size_t timecnt = transitions_.size(); + assert(timecnt != 0); // We always add a transition. + + // Find the first transition after our target civil time. + const Transition* tr = nullptr; + const Transition* begin = &transitions_[0]; + const Transition* end = begin + timecnt; + if (cs < begin->civil_sec) { + tr = begin; + } else if (cs >= transitions_[timecnt - 1].civil_sec) { + tr = end; + } else { + const std::size_t hint = time_local_hint_.load(std::memory_order_relaxed); + if (0 < hint && hint < timecnt) { + if (transitions_[hint - 1].civil_sec <= cs) { + if (cs < transitions_[hint].civil_sec) { + tr = begin + hint; + } + } + } + if (tr == nullptr) { + const Transition target = {0, 0, cs, civil_second()}; + tr = std::upper_bound(begin, end, target, Transition::ByCivilTime()); + time_local_hint_.store(static_cast<std::size_t>(tr - begin), + std::memory_order_relaxed); + } + } + + if (tr == begin) { + if (tr->prev_civil_sec >= cs) { + // Before first transition, so use the default offset. + const TransitionType& tt(transition_types_[default_transition_type_]); + if (cs < tt.civil_min) return MakeUnique(time_point<seconds>::min()); + return MakeUnique(cs - (civil_second() + tt.utc_offset)); + } + // tr->prev_civil_sec < cs < tr->civil_sec + return MakeSkipped(*tr, cs); + } + + if (tr == end) { + if (cs > (--tr)->prev_civil_sec) { + // After the last transition. If we extended the transitions using + // future_spec_, shift back to a supported year using the 400-year + // cycle of calendaric equivalence and then compensate accordingly. + if (extended_ && cs.year() > last_year_) { + const year_t shift = (cs.year() - last_year_ - 1) / 400 + 1; + return TimeLocal(YearShift(cs, shift * -400), shift); + } + const TransitionType& tt(transition_types_[tr->type_index]); + if (cs > tt.civil_max) return MakeUnique(time_point<seconds>::max()); + return MakeUnique(tr->unix_time + (cs - tr->civil_sec)); + } + // tr->civil_sec <= cs <= tr->prev_civil_sec + return MakeRepeated(*tr, cs); + } + + if (tr->prev_civil_sec < cs) { + // tr->prev_civil_sec < cs < tr->civil_sec + return MakeSkipped(*tr, cs); + } + + if (cs <= (--tr)->prev_civil_sec) { + // tr->civil_sec <= cs <= tr->prev_civil_sec + return MakeRepeated(*tr, cs); + } + + // In between transitions. + return MakeUnique(tr->unix_time + (cs - tr->civil_sec)); +} + +std::string TimeZoneInfo::Version() const { return version_; } + +std::string TimeZoneInfo::Description() const { + std::ostringstream oss; + oss << "#trans=" << transitions_.size(); + oss << " #types=" << transition_types_.size(); + oss << " spec='" << future_spec_ << "'"; + return oss.str(); +} + +bool TimeZoneInfo::NextTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const { + if (transitions_.empty()) return false; + const Transition* begin = &transitions_[0]; + const Transition* end = begin + transitions_.size(); + if (begin->unix_time <= -(1LL << 59)) { + // Do not report the BIG_BANG found in recent zoneinfo data as it is + // really a sentinel, not a transition. See tz/zic.c. + ++begin; + } + std::int_fast64_t unix_time = ToUnixSeconds(tp); + const Transition target = {unix_time, 0, civil_second(), civil_second()}; + const Transition* tr = + std::upper_bound(begin, end, target, Transition::ByUnixTime()); + for (; tr != end; ++tr) { // skip no-op transitions + std::uint_fast8_t prev_type_index = + (tr == begin) ? default_transition_type_ : tr[-1].type_index; + if (!EquivTransitions(prev_type_index, tr[0].type_index)) break; + } + // When tr == end we return false, ignoring future_spec_. + if (tr == end) return false; + trans->from = tr->prev_civil_sec + 1; + trans->to = tr->civil_sec; + return true; +} + +bool TimeZoneInfo::PrevTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const { + if (transitions_.empty()) return false; + const Transition* begin = &transitions_[0]; + const Transition* end = begin + transitions_.size(); + if (begin->unix_time <= -(1LL << 59)) { + // Do not report the BIG_BANG found in recent zoneinfo data as it is + // really a sentinel, not a transition. See tz/zic.c. + ++begin; + } + std::int_fast64_t unix_time = ToUnixSeconds(tp); + if (FromUnixSeconds(unix_time) != tp) { + if (unix_time == std::numeric_limits<std::int_fast64_t>::max()) { + if (end == begin) return false; // Ignore future_spec_. + trans->from = (--end)->prev_civil_sec + 1; + trans->to = end->civil_sec; + return true; + } + unix_time += 1; // ceils + } + const Transition target = {unix_time, 0, civil_second(), civil_second()}; + const Transition* tr = + std::lower_bound(begin, end, target, Transition::ByUnixTime()); + for (; tr != begin; --tr) { // skip no-op transitions + std::uint_fast8_t prev_type_index = + (tr - 1 == begin) ? default_transition_type_ : tr[-2].type_index; + if (!EquivTransitions(prev_type_index, tr[-1].type_index)) break; + } + // When tr == end we return the "last" transition, ignoring future_spec_. + if (tr == begin) return false; + trans->from = (--tr)->prev_civil_sec + 1; + trans->to = tr->civil_sec; + return true; +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.h b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.h new file mode 100644 index 0000000000..2a10c06c77 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_info.h @@ -0,0 +1,138 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_INFO_H_ +#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_INFO_H_ + +#include <atomic> +#include <cstddef> +#include <cstdint> +#include <string> +#include <vector> + +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" +#include "absl/time/internal/cctz/include/cctz/zone_info_source.h" +#include "time_zone_if.h" +#include "tzfile.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +// A transition to a new UTC offset. +struct Transition { + std::int_least64_t unix_time; // the instant of this transition + std::uint_least8_t type_index; // index of the transition type + civil_second civil_sec; // local civil time of transition + civil_second prev_civil_sec; // local civil time one second earlier + + struct ByUnixTime { + inline bool operator()(const Transition& lhs, const Transition& rhs) const { + return lhs.unix_time < rhs.unix_time; + } + }; + struct ByCivilTime { + inline bool operator()(const Transition& lhs, const Transition& rhs) const { + return lhs.civil_sec < rhs.civil_sec; + } + }; +}; + +// The characteristics of a particular transition. +struct TransitionType { + std::int_least32_t utc_offset; // the new prevailing UTC offset + civil_second civil_max; // max convertible civil time for offset + civil_second civil_min; // min convertible civil time for offset + bool is_dst; // did we move into daylight-saving time + std::uint_least8_t abbr_index; // index of the new abbreviation +}; + +// A time zone backed by the IANA Time Zone Database (zoneinfo). +class TimeZoneInfo : public TimeZoneIf { + public: + TimeZoneInfo() = default; + TimeZoneInfo(const TimeZoneInfo&) = delete; + TimeZoneInfo& operator=(const TimeZoneInfo&) = delete; + + // Loads the zoneinfo for the given name, returning true if successful. + bool Load(const std::string& name); + + // TimeZoneIf implementations. + time_zone::absolute_lookup BreakTime( + const time_point<seconds>& tp) const override; + time_zone::civil_lookup MakeTime(const civil_second& cs) const override; + bool NextTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const override; + bool PrevTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const override; + std::string Version() const override; + std::string Description() const override; + + private: + struct Header { // counts of: + std::size_t timecnt; // transition times + std::size_t typecnt; // transition types + std::size_t charcnt; // zone abbreviation characters + std::size_t leapcnt; // leap seconds (we expect none) + std::size_t ttisstdcnt; // UTC/local indicators (unused) + std::size_t ttisutcnt; // standard/wall indicators (unused) + + bool Build(const tzhead& tzh); + std::size_t DataLength(std::size_t time_len) const; + }; + + void CheckTransition(const std::string& name, const TransitionType& tt, + std::int_fast32_t offset, bool is_dst, + const std::string& abbr) const; + bool EquivTransitions(std::uint_fast8_t tt1_index, + std::uint_fast8_t tt2_index) const; + void ExtendTransitions(const std::string& name, const Header& hdr); + + bool ResetToBuiltinUTC(const seconds& offset); + bool Load(const std::string& name, ZoneInfoSource* zip); + + // Helpers for BreakTime() and MakeTime(). + time_zone::absolute_lookup LocalTime(std::int_fast64_t unix_time, + const TransitionType& tt) const; + time_zone::absolute_lookup LocalTime(std::int_fast64_t unix_time, + const Transition& tr) const; + time_zone::civil_lookup TimeLocal(const civil_second& cs, + year_t c4_shift) const; + + std::vector<Transition> transitions_; // ordered by unix_time and civil_sec + std::vector<TransitionType> transition_types_; // distinct transition types + std::uint_fast8_t default_transition_type_; // for before first transition + std::string abbreviations_; // all the NUL-terminated abbreviations + + std::string version_; // the tzdata version if available + std::string future_spec_; // for after the last zic transition + bool extended_; // future_spec_ was used to generate transitions + year_t last_year_; // the final year of the generated transitions + + // We remember the transitions found during the last BreakTime() and + // MakeTime() calls. If the next request is for the same transition we + // will avoid re-searching. + mutable std::atomic<std::size_t> local_time_hint_ = {}; // BreakTime() hint + mutable std::atomic<std::size_t> time_local_hint_ = {}; // MakeTime() hint +}; + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_INFO_H_ diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_libc.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_libc.cc new file mode 100644 index 0000000000..47cf84c663 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_libc.cc @@ -0,0 +1,308 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#if defined(_WIN32) || defined(_WIN64) +#define _CRT_SECURE_NO_WARNINGS 1 +#endif + +#include "time_zone_libc.h" + +#include <chrono> +#include <ctime> +#include <limits> +#include <utility> + +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +namespace { + +#if defined(_WIN32) || defined(_WIN64) +// Uses the globals: '_timezone', '_dstbias' and '_tzname'. +auto tm_gmtoff(const std::tm& tm) -> decltype(_timezone + _dstbias) { + const bool is_dst = tm.tm_isdst > 0; + return _timezone + (is_dst ? _dstbias : 0); +} +auto tm_zone(const std::tm& tm) -> decltype(_tzname[0]) { + const bool is_dst = tm.tm_isdst > 0; + return _tzname[is_dst]; +} +#elif defined(__sun) +// Uses the globals: 'timezone', 'altzone' and 'tzname'. +auto tm_gmtoff(const std::tm& tm) -> decltype(timezone) { + const bool is_dst = tm.tm_isdst > 0; + return is_dst ? altzone : timezone; +} +auto tm_zone(const std::tm& tm) -> decltype(tzname[0]) { + const bool is_dst = tm.tm_isdst > 0; + return tzname[is_dst]; +} +#elif defined(__native_client__) || defined(__myriad2__) || \ + defined(__EMSCRIPTEN__) +// Uses the globals: 'timezone' and 'tzname'. +auto tm_gmtoff(const std::tm& tm) -> decltype(_timezone + 0) { + const bool is_dst = tm.tm_isdst > 0; + return _timezone + (is_dst ? 60 * 60 : 0); +} +auto tm_zone(const std::tm& tm) -> decltype(tzname[0]) { + const bool is_dst = tm.tm_isdst > 0; + return tzname[is_dst]; +} +#else +// Adapt to different spellings of the struct std::tm extension fields. +#if defined(tm_gmtoff) +auto tm_gmtoff(const std::tm& tm) -> decltype(tm.tm_gmtoff) { + return tm.tm_gmtoff; +} +#elif defined(__tm_gmtoff) +auto tm_gmtoff(const std::tm& tm) -> decltype(tm.__tm_gmtoff) { + return tm.__tm_gmtoff; +} +#else +template <typename T> +auto tm_gmtoff(const T& tm) -> decltype(tm.tm_gmtoff) { + return tm.tm_gmtoff; +} +template <typename T> +auto tm_gmtoff(const T& tm) -> decltype(tm.__tm_gmtoff) { + return tm.__tm_gmtoff; +} +#endif // tm_gmtoff +#if defined(tm_zone) +auto tm_zone(const std::tm& tm) -> decltype(tm.tm_zone) { return tm.tm_zone; } +#elif defined(__tm_zone) +auto tm_zone(const std::tm& tm) -> decltype(tm.__tm_zone) { + return tm.__tm_zone; +} +#else +template <typename T> +auto tm_zone(const T& tm) -> decltype(tm.tm_zone) { + return tm.tm_zone; +} +template <typename T> +auto tm_zone(const T& tm) -> decltype(tm.__tm_zone) { + return tm.__tm_zone; +} +#endif // tm_zone +#endif + +inline std::tm* gm_time(const std::time_t* timep, std::tm* result) { +#if defined(_WIN32) || defined(_WIN64) + return gmtime_s(result, timep) ? nullptr : result; +#else + return gmtime_r(timep, result); +#endif +} + +inline std::tm* local_time(const std::time_t* timep, std::tm* result) { +#if defined(_WIN32) || defined(_WIN64) + return localtime_s(result, timep) ? nullptr : result; +#else + return localtime_r(timep, result); +#endif +} + +// Converts a civil second and "dst" flag into a time_t and UTC offset. +// Returns false if time_t cannot represent the requested civil second. +// Caller must have already checked that cs.year() will fit into a tm_year. +bool make_time(const civil_second& cs, int is_dst, std::time_t* t, int* off) { + std::tm tm; + tm.tm_year = static_cast<int>(cs.year() - year_t{1900}); + tm.tm_mon = cs.month() - 1; + tm.tm_mday = cs.day(); + tm.tm_hour = cs.hour(); + tm.tm_min = cs.minute(); + tm.tm_sec = cs.second(); + tm.tm_isdst = is_dst; + *t = std::mktime(&tm); + if (*t == std::time_t{-1}) { + std::tm tm2; + const std::tm* tmp = local_time(t, &tm2); + if (tmp == nullptr || tmp->tm_year != tm.tm_year || + tmp->tm_mon != tm.tm_mon || tmp->tm_mday != tm.tm_mday || + tmp->tm_hour != tm.tm_hour || tmp->tm_min != tm.tm_min || + tmp->tm_sec != tm.tm_sec) { + // A true error (not just one second before the epoch). + return false; + } + } + *off = static_cast<int>(tm_gmtoff(tm)); + return true; +} + +// Find the least time_t in [lo:hi] where local time matches offset, given: +// (1) lo doesn't match, (2) hi does, and (3) there is only one transition. +std::time_t find_trans(std::time_t lo, std::time_t hi, int offset) { + std::tm tm; + while (lo + 1 != hi) { + const std::time_t mid = lo + (hi - lo) / 2; + if (std::tm* tmp = local_time(&mid, &tm)) { + if (tm_gmtoff(*tmp) == offset) { + hi = mid; + } else { + lo = mid; + } + } else { + // If std::tm cannot hold some result we resort to a linear search, + // ignoring all failed conversions. Slow, but never really happens. + while (++lo != hi) { + if (std::tm* tmp = local_time(&lo, &tm)) { + if (tm_gmtoff(*tmp) == offset) break; + } + } + return lo; + } + } + return hi; +} + +} // namespace + +TimeZoneLibC::TimeZoneLibC(const std::string& name) + : local_(name == "localtime") {} + +time_zone::absolute_lookup TimeZoneLibC::BreakTime( + const time_point<seconds>& tp) const { + time_zone::absolute_lookup al; + al.offset = 0; + al.is_dst = false; + al.abbr = "-00"; + + const std::int_fast64_t s = ToUnixSeconds(tp); + + // If std::time_t cannot hold the input we saturate the output. + if (s < std::numeric_limits<std::time_t>::min()) { + al.cs = civil_second::min(); + return al; + } + if (s > std::numeric_limits<std::time_t>::max()) { + al.cs = civil_second::max(); + return al; + } + + const std::time_t t = static_cast<std::time_t>(s); + std::tm tm; + std::tm* tmp = local_ ? local_time(&t, &tm) : gm_time(&t, &tm); + + // If std::tm cannot hold the result we saturate the output. + if (tmp == nullptr) { + al.cs = (s < 0) ? civil_second::min() : civil_second::max(); + return al; + } + + const year_t year = tmp->tm_year + year_t{1900}; + al.cs = civil_second(year, tmp->tm_mon + 1, tmp->tm_mday, tmp->tm_hour, + tmp->tm_min, tmp->tm_sec); + al.offset = static_cast<int>(tm_gmtoff(*tmp)); + al.abbr = local_ ? tm_zone(*tmp) : "UTC"; // as expected by cctz + al.is_dst = tmp->tm_isdst > 0; + return al; +} + +time_zone::civil_lookup TimeZoneLibC::MakeTime(const civil_second& cs) const { + if (!local_) { + // If time_point<seconds> cannot hold the result we saturate. + static const civil_second min_tp_cs = + civil_second() + ToUnixSeconds(time_point<seconds>::min()); + static const civil_second max_tp_cs = + civil_second() + ToUnixSeconds(time_point<seconds>::max()); + const time_point<seconds> tp = + (cs < min_tp_cs) + ? time_point<seconds>::min() + : (cs > max_tp_cs) ? time_point<seconds>::max() + : FromUnixSeconds(cs - civil_second()); + return {time_zone::civil_lookup::UNIQUE, tp, tp, tp}; + } + + // If tm_year cannot hold the requested year we saturate the result. + if (cs.year() < 0) { + if (cs.year() < std::numeric_limits<int>::min() + year_t{1900}) { + const time_point<seconds> tp = time_point<seconds>::min(); + return {time_zone::civil_lookup::UNIQUE, tp, tp, tp}; + } + } else { + if (cs.year() - year_t{1900} > std::numeric_limits<int>::max()) { + const time_point<seconds> tp = time_point<seconds>::max(); + return {time_zone::civil_lookup::UNIQUE, tp, tp, tp}; + } + } + + // We probe with "is_dst" values of 0 and 1 to try to distinguish unique + // civil seconds from skipped or repeated ones. This is not always possible + // however, as the "dst" flag does not change over some offset transitions. + // We are also subject to the vagaries of mktime() implementations. + std::time_t t0, t1; + int offset0, offset1; + if (make_time(cs, 0, &t0, &offset0) && make_time(cs, 1, &t1, &offset1)) { + if (t0 == t1) { + // The civil time was singular (pre == trans == post). + const time_point<seconds> tp = FromUnixSeconds(t0); + return {time_zone::civil_lookup::UNIQUE, tp, tp, tp}; + } + + if (t0 > t1) { + std::swap(t0, t1); + std::swap(offset0, offset1); + } + const std::time_t tt = find_trans(t0, t1, offset1); + const time_point<seconds> trans = FromUnixSeconds(tt); + + if (offset0 < offset1) { + // The civil time did not exist (pre >= trans > post). + const time_point<seconds> pre = FromUnixSeconds(t1); + const time_point<seconds> post = FromUnixSeconds(t0); + return {time_zone::civil_lookup::SKIPPED, pre, trans, post}; + } + + // The civil time was ambiguous (pre < trans <= post). + const time_point<seconds> pre = FromUnixSeconds(t0); + const time_point<seconds> post = FromUnixSeconds(t1); + return {time_zone::civil_lookup::REPEATED, pre, trans, post}; + } + + // make_time() failed somehow so we saturate the result. + const time_point<seconds> tp = (cs < civil_second()) + ? time_point<seconds>::min() + : time_point<seconds>::max(); + return {time_zone::civil_lookup::UNIQUE, tp, tp, tp}; +} + +bool TimeZoneLibC::NextTransition(const time_point<seconds>&, + time_zone::civil_transition*) const { + return false; +} + +bool TimeZoneLibC::PrevTransition(const time_point<seconds>&, + time_zone::civil_transition*) const { + return false; +} + +std::string TimeZoneLibC::Version() const { + return std::string(); // unknown +} + +std::string TimeZoneLibC::Description() const { + return local_ ? "localtime" : "UTC"; +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_libc.h b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_libc.h new file mode 100644 index 0000000000..1da9039a15 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_libc.h @@ -0,0 +1,55 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_ +#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_ + +#include <string> + +#include "absl/base/config.h" +#include "time_zone_if.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +// A time zone backed by gmtime_r(3), localtime_r(3), and mktime(3), +// and which therefore only supports UTC and the local time zone. +// TODO: Add support for fixed offsets from UTC. +class TimeZoneLibC : public TimeZoneIf { + public: + explicit TimeZoneLibC(const std::string& name); + + // TimeZoneIf implementations. + time_zone::absolute_lookup BreakTime( + const time_point<seconds>& tp) const override; + time_zone::civil_lookup MakeTime(const civil_second& cs) const override; + bool NextTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const override; + bool PrevTransition(const time_point<seconds>& tp, + time_zone::civil_transition* trans) const override; + std::string Version() const override; + std::string Description() const override; + + private: + const bool local_; // localtime or UTC +}; + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_ diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc new file mode 100644 index 0000000000..efdea64b4e --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup.cc @@ -0,0 +1,187 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" + +#if defined(__ANDROID__) +#include <sys/system_properties.h> +#if defined(__ANDROID_API__) && __ANDROID_API__ >= 21 +#include <dlfcn.h> +#endif +#endif + +#if defined(__APPLE__) +#include <CoreFoundation/CFTimeZone.h> + +#include <vector> +#endif + +#include <cstdlib> +#include <cstring> +#include <string> + +#include "time_zone_fixed.h" +#include "time_zone_impl.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +#if defined(__ANDROID__) && defined(__ANDROID_API__) && __ANDROID_API__ >= 21 +namespace { +// Android 'L' removes __system_property_get() from the NDK, however +// it is still a hidden symbol in libc so we use dlsym() to access it. +// See Chromium's base/sys_info_android.cc for a similar example. + +using property_get_func = int (*)(const char*, char*); + +property_get_func LoadSystemPropertyGet() { + int flag = RTLD_LAZY | RTLD_GLOBAL; +#if defined(RTLD_NOLOAD) + flag |= RTLD_NOLOAD; // libc.so should already be resident +#endif + if (void* handle = dlopen("libc.so", flag)) { + void* sym = dlsym(handle, "__system_property_get"); + dlclose(handle); + return reinterpret_cast<property_get_func>(sym); + } + return nullptr; +} + +int __system_property_get(const char* name, char* value) { + static property_get_func system_property_get = LoadSystemPropertyGet(); + return system_property_get ? system_property_get(name, value) : -1; +} + +} // namespace +#endif + +std::string time_zone::name() const { return effective_impl().Name(); } + +time_zone::absolute_lookup time_zone::lookup( + const time_point<seconds>& tp) const { + return effective_impl().BreakTime(tp); +} + +time_zone::civil_lookup time_zone::lookup(const civil_second& cs) const { + return effective_impl().MakeTime(cs); +} + +bool time_zone::next_transition(const time_point<seconds>& tp, + civil_transition* trans) const { + return effective_impl().NextTransition(tp, trans); +} + +bool time_zone::prev_transition(const time_point<seconds>& tp, + civil_transition* trans) const { + return effective_impl().PrevTransition(tp, trans); +} + +std::string time_zone::version() const { return effective_impl().Version(); } + +std::string time_zone::description() const { + return effective_impl().Description(); +} + +const time_zone::Impl& time_zone::effective_impl() const { + if (impl_ == nullptr) { + // Dereferencing an implicit-UTC time_zone is expected to be + // rare, so we don't mind paying a small synchronization cost. + return *time_zone::Impl::UTC().impl_; + } + return *impl_; +} + +bool load_time_zone(const std::string& name, time_zone* tz) { + return time_zone::Impl::LoadTimeZone(name, tz); +} + +time_zone utc_time_zone() { + return time_zone::Impl::UTC(); // avoid name lookup +} + +time_zone fixed_time_zone(const seconds& offset) { + time_zone tz; + load_time_zone(FixedOffsetToName(offset), &tz); + return tz; +} + +time_zone local_time_zone() { + const char* zone = ":localtime"; +#if defined(__ANDROID__) + char sysprop[PROP_VALUE_MAX]; + if (__system_property_get("persist.sys.timezone", sysprop) > 0) { + zone = sysprop; + } +#endif +#if defined(__APPLE__) + std::vector<char> buffer; + CFTimeZoneRef tz_default = CFTimeZoneCopyDefault(); + if (CFStringRef tz_name = CFTimeZoneGetName(tz_default)) { + CFStringEncoding encoding = kCFStringEncodingUTF8; + CFIndex length = CFStringGetLength(tz_name); + buffer.resize(CFStringGetMaximumSizeForEncoding(length, encoding) + 1); + if (CFStringGetCString(tz_name, &buffer[0], buffer.size(), encoding)) { + zone = &buffer[0]; + } + } + CFRelease(tz_default); +#endif + + // Allow ${TZ} to override to default zone. + char* tz_env = nullptr; +#if defined(_MSC_VER) + _dupenv_s(&tz_env, nullptr, "TZ"); +#else + tz_env = std::getenv("TZ"); +#endif + if (tz_env) zone = tz_env; + + // We only support the "[:]<zone-name>" form. + if (*zone == ':') ++zone; + + // Map "localtime" to a system-specific name, but + // allow ${LOCALTIME} to override the default name. + char* localtime_env = nullptr; + if (strcmp(zone, "localtime") == 0) { +#if defined(_MSC_VER) + // System-specific default is just "localtime". + _dupenv_s(&localtime_env, nullptr, "LOCALTIME"); +#else + zone = "/etc/localtime"; // System-specific default. + localtime_env = std::getenv("LOCALTIME"); +#endif + if (localtime_env) zone = localtime_env; + } + + const std::string name = zone; +#if defined(_MSC_VER) + free(localtime_env); + free(tz_env); +#endif + + time_zone tz; + load_time_zone(name, &tz); // Falls back to UTC. + // TODO: Follow the RFC3339 "Unknown Local Offset Convention" and + // arrange for %z to generate "-0000" when we don't know the local + // offset because the load_time_zone() failed and we're using UTC. + return tz; +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup_test.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup_test.cc new file mode 100644 index 0000000000..99137a082a --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_lookup_test.cc @@ -0,0 +1,1437 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include <chrono> +#include <cstddef> +#include <cstdlib> +#include <future> +#include <limits> +#include <string> +#include <thread> +#include <vector> + +#include "gtest/gtest.h" +#include "absl/base/config.h" +#include "absl/time/internal/cctz/include/cctz/civil_time.h" +#include "absl/time/internal/cctz/include/cctz/time_zone.h" + +namespace chrono = std::chrono; + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +namespace { + +// A list of known time-zone names. +const char* const kTimeZoneNames[] = {"Africa/Abidjan", + "Africa/Accra", + "Africa/Addis_Ababa", + "Africa/Algiers", + "Africa/Asmara", + "Africa/Asmera", + "Africa/Bamako", + "Africa/Bangui", + "Africa/Banjul", + "Africa/Bissau", + "Africa/Blantyre", + "Africa/Brazzaville", + "Africa/Bujumbura", + "Africa/Cairo", + "Africa/Casablanca", + "Africa/Ceuta", + "Africa/Conakry", + "Africa/Dakar", + "Africa/Dar_es_Salaam", + "Africa/Djibouti", + "Africa/Douala", + "Africa/El_Aaiun", + "Africa/Freetown", + "Africa/Gaborone", + "Africa/Harare", + "Africa/Johannesburg", + "Africa/Juba", + "Africa/Kampala", + "Africa/Khartoum", + "Africa/Kigali", + "Africa/Kinshasa", + "Africa/Lagos", + "Africa/Libreville", + "Africa/Lome", + "Africa/Luanda", + "Africa/Lubumbashi", + "Africa/Lusaka", + "Africa/Malabo", + "Africa/Maputo", + "Africa/Maseru", + "Africa/Mbabane", + "Africa/Mogadishu", + "Africa/Monrovia", + "Africa/Nairobi", + "Africa/Ndjamena", + "Africa/Niamey", + "Africa/Nouakchott", + "Africa/Ouagadougou", + "Africa/Porto-Novo", + "Africa/Sao_Tome", + "Africa/Timbuktu", + "Africa/Tripoli", + "Africa/Tunis", + "Africa/Windhoek", + "America/Adak", + "America/Anchorage", + "America/Anguilla", + "America/Antigua", + "America/Araguaina", + "America/Argentina/Buenos_Aires", + "America/Argentina/Catamarca", + "America/Argentina/ComodRivadavia", + "America/Argentina/Cordoba", + "America/Argentina/Jujuy", + "America/Argentina/La_Rioja", + "America/Argentina/Mendoza", + "America/Argentina/Rio_Gallegos", + "America/Argentina/Salta", + "America/Argentina/San_Juan", + "America/Argentina/San_Luis", + "America/Argentina/Tucuman", + "America/Argentina/Ushuaia", + "America/Aruba", + "America/Asuncion", + "America/Atikokan", + "America/Atka", + "America/Bahia", + "America/Bahia_Banderas", + "America/Barbados", + "America/Belem", + "America/Belize", + "America/Blanc-Sablon", + "America/Boa_Vista", + "America/Bogota", + "America/Boise", + "America/Buenos_Aires", + "America/Cambridge_Bay", + "America/Campo_Grande", + "America/Cancun", + "America/Caracas", + "America/Catamarca", + "America/Cayenne", + "America/Cayman", + "America/Chicago", + "America/Chihuahua", + "America/Coral_Harbour", + "America/Cordoba", + "America/Costa_Rica", + "America/Creston", + "America/Cuiaba", + "America/Curacao", + "America/Danmarkshavn", + "America/Dawson", + "America/Dawson_Creek", + "America/Denver", + "America/Detroit", + "America/Dominica", + "America/Edmonton", + "America/Eirunepe", + "America/El_Salvador", + "America/Ensenada", + "America/Fort_Nelson", + "America/Fort_Wayne", + "America/Fortaleza", + "America/Glace_Bay", + "America/Godthab", + "America/Goose_Bay", + "America/Grand_Turk", + "America/Grenada", + "America/Guadeloupe", + "America/Guatemala", + "America/Guayaquil", + "America/Guyana", + "America/Halifax", + "America/Havana", + "America/Hermosillo", + "America/Indiana/Indianapolis", + "America/Indiana/Knox", + "America/Indiana/Marengo", + "America/Indiana/Petersburg", + "America/Indiana/Tell_City", + "America/Indiana/Vevay", + "America/Indiana/Vincennes", + "America/Indiana/Winamac", + "America/Indianapolis", + "America/Inuvik", + "America/Iqaluit", + "America/Jamaica", + "America/Jujuy", + "America/Juneau", + "America/Kentucky/Louisville", + "America/Kentucky/Monticello", + "America/Knox_IN", + "America/Kralendijk", + "America/La_Paz", + "America/Lima", + "America/Los_Angeles", + "America/Louisville", + "America/Lower_Princes", + "America/Maceio", + "America/Managua", + "America/Manaus", + "America/Marigot", + "America/Martinique", + "America/Matamoros", + "America/Mazatlan", + "America/Mendoza", + "America/Menominee", + "America/Merida", + "America/Metlakatla", + "America/Mexico_City", + "America/Miquelon", + "America/Moncton", + "America/Monterrey", + "America/Montevideo", + "America/Montreal", + "America/Montserrat", + "America/Nassau", + "America/New_York", + "America/Nipigon", + "America/Nome", + "America/Noronha", + "America/North_Dakota/Beulah", + "America/North_Dakota/Center", + "America/North_Dakota/New_Salem", + "America/Ojinaga", + "America/Panama", + "America/Pangnirtung", + "America/Paramaribo", + "America/Phoenix", + "America/Port-au-Prince", + "America/Port_of_Spain", + "America/Porto_Acre", + "America/Porto_Velho", + "America/Puerto_Rico", + "America/Punta_Arenas", + "America/Rainy_River", + "America/Rankin_Inlet", + "America/Recife", + "America/Regina", + "America/Resolute", + "America/Rio_Branco", + "America/Rosario", + "America/Santa_Isabel", + "America/Santarem", + "America/Santiago", + "America/Santo_Domingo", + "America/Sao_Paulo", + "America/Scoresbysund", + "America/Shiprock", + "America/Sitka", + "America/St_Barthelemy", + "America/St_Johns", + "America/St_Kitts", + "America/St_Lucia", + "America/St_Thomas", + "America/St_Vincent", + "America/Swift_Current", + "America/Tegucigalpa", + "America/Thule", + "America/Thunder_Bay", + "America/Tijuana", + "America/Toronto", + "America/Tortola", + "America/Vancouver", + "America/Virgin", + "America/Whitehorse", + "America/Winnipeg", + "America/Yakutat", + "America/Yellowknife", + "Antarctica/Casey", + "Antarctica/Davis", + "Antarctica/DumontDUrville", + "Antarctica/Macquarie", + "Antarctica/Mawson", + "Antarctica/McMurdo", + "Antarctica/Palmer", + "Antarctica/Rothera", + "Antarctica/South_Pole", + "Antarctica/Syowa", + "Antarctica/Troll", + "Antarctica/Vostok", + "Arctic/Longyearbyen", + "Asia/Aden", + "Asia/Almaty", + "Asia/Amman", + "Asia/Anadyr", + "Asia/Aqtau", + "Asia/Aqtobe", + "Asia/Ashgabat", + "Asia/Ashkhabad", + "Asia/Atyrau", + "Asia/Baghdad", + "Asia/Bahrain", + "Asia/Baku", + "Asia/Bangkok", + "Asia/Barnaul", + "Asia/Beirut", + "Asia/Bishkek", + "Asia/Brunei", + "Asia/Calcutta", + "Asia/Chita", + "Asia/Choibalsan", + "Asia/Chongqing", + "Asia/Chungking", + "Asia/Colombo", + "Asia/Dacca", + "Asia/Damascus", + "Asia/Dhaka", + "Asia/Dili", + "Asia/Dubai", + "Asia/Dushanbe", + "Asia/Famagusta", + "Asia/Gaza", + "Asia/Harbin", + "Asia/Hebron", + "Asia/Ho_Chi_Minh", + "Asia/Hong_Kong", + "Asia/Hovd", + "Asia/Irkutsk", + "Asia/Istanbul", + "Asia/Jakarta", + "Asia/Jayapura", + "Asia/Jerusalem", + "Asia/Kabul", + "Asia/Kamchatka", + "Asia/Karachi", + "Asia/Kashgar", + "Asia/Kathmandu", + "Asia/Katmandu", + "Asia/Khandyga", + "Asia/Kolkata", + "Asia/Krasnoyarsk", + "Asia/Kuala_Lumpur", + "Asia/Kuching", + "Asia/Kuwait", + "Asia/Macao", + "Asia/Macau", + "Asia/Magadan", + "Asia/Makassar", + "Asia/Manila", + "Asia/Muscat", + "Asia/Nicosia", + "Asia/Novokuznetsk", + "Asia/Novosibirsk", + "Asia/Omsk", + "Asia/Oral", + "Asia/Phnom_Penh", + "Asia/Pontianak", + "Asia/Pyongyang", + "Asia/Qatar", + "Asia/Qostanay", + "Asia/Qyzylorda", + "Asia/Rangoon", + "Asia/Riyadh", + "Asia/Saigon", + "Asia/Sakhalin", + "Asia/Samarkand", + "Asia/Seoul", + "Asia/Shanghai", + "Asia/Singapore", + "Asia/Srednekolymsk", + "Asia/Taipei", + "Asia/Tashkent", + "Asia/Tbilisi", + "Asia/Tehran", + "Asia/Tel_Aviv", + "Asia/Thimbu", + "Asia/Thimphu", + "Asia/Tokyo", + "Asia/Tomsk", + "Asia/Ujung_Pandang", + "Asia/Ulaanbaatar", + "Asia/Ulan_Bator", + "Asia/Urumqi", + "Asia/Ust-Nera", + "Asia/Vientiane", + "Asia/Vladivostok", + "Asia/Yakutsk", + "Asia/Yangon", + "Asia/Yekaterinburg", + "Asia/Yerevan", + "Atlantic/Azores", + "Atlantic/Bermuda", + "Atlantic/Canary", + "Atlantic/Cape_Verde", + "Atlantic/Faeroe", + "Atlantic/Faroe", + "Atlantic/Jan_Mayen", + "Atlantic/Madeira", + "Atlantic/Reykjavik", + "Atlantic/South_Georgia", + "Atlantic/St_Helena", + "Atlantic/Stanley", + "Australia/ACT", + "Australia/Adelaide", + "Australia/Brisbane", + "Australia/Broken_Hill", + "Australia/Canberra", + "Australia/Currie", + "Australia/Darwin", + "Australia/Eucla", + "Australia/Hobart", + "Australia/LHI", + "Australia/Lindeman", + "Australia/Lord_Howe", + "Australia/Melbourne", + "Australia/NSW", + "Australia/North", + "Australia/Perth", + "Australia/Queensland", + "Australia/South", + "Australia/Sydney", + "Australia/Tasmania", + "Australia/Victoria", + "Australia/West", + "Australia/Yancowinna", + "Brazil/Acre", + "Brazil/DeNoronha", + "Brazil/East", + "Brazil/West", + "CET", + "CST6CDT", + "Canada/Atlantic", + "Canada/Central", + "Canada/Eastern", + "Canada/Mountain", + "Canada/Newfoundland", + "Canada/Pacific", + "Canada/Saskatchewan", + "Canada/Yukon", + "Chile/Continental", + "Chile/EasterIsland", + "Cuba", + "EET", + "EST", + "EST5EDT", + "Egypt", + "Eire", + "Etc/GMT", + "Etc/GMT+0", + "Etc/GMT+1", + "Etc/GMT+10", + "Etc/GMT+11", + "Etc/GMT+12", + "Etc/GMT+2", + "Etc/GMT+3", + "Etc/GMT+4", + "Etc/GMT+5", + "Etc/GMT+6", + "Etc/GMT+7", + "Etc/GMT+8", + "Etc/GMT+9", + "Etc/GMT-0", + "Etc/GMT-1", + "Etc/GMT-10", + "Etc/GMT-11", + "Etc/GMT-12", + "Etc/GMT-13", + "Etc/GMT-14", + "Etc/GMT-2", + "Etc/GMT-3", + "Etc/GMT-4", + "Etc/GMT-5", + "Etc/GMT-6", + "Etc/GMT-7", + "Etc/GMT-8", + "Etc/GMT-9", + "Etc/GMT0", + "Etc/Greenwich", + "Etc/UCT", + "Etc/UTC", + "Etc/Universal", + "Etc/Zulu", + "Europe/Amsterdam", + "Europe/Andorra", + "Europe/Astrakhan", + "Europe/Athens", + "Europe/Belfast", + "Europe/Belgrade", + "Europe/Berlin", + "Europe/Bratislava", + "Europe/Brussels", + "Europe/Bucharest", + "Europe/Budapest", + "Europe/Busingen", + "Europe/Chisinau", + "Europe/Copenhagen", + "Europe/Dublin", + "Europe/Gibraltar", + "Europe/Guernsey", + "Europe/Helsinki", + "Europe/Isle_of_Man", + "Europe/Istanbul", + "Europe/Jersey", + "Europe/Kaliningrad", + "Europe/Kiev", + "Europe/Kirov", + "Europe/Lisbon", + "Europe/Ljubljana", + "Europe/London", + "Europe/Luxembourg", + "Europe/Madrid", + "Europe/Malta", + "Europe/Mariehamn", + "Europe/Minsk", + "Europe/Monaco", + "Europe/Moscow", + "Europe/Nicosia", + "Europe/Oslo", + "Europe/Paris", + "Europe/Podgorica", + "Europe/Prague", + "Europe/Riga", + "Europe/Rome", + "Europe/Samara", + "Europe/San_Marino", + "Europe/Sarajevo", + "Europe/Saratov", + "Europe/Simferopol", + "Europe/Skopje", + "Europe/Sofia", + "Europe/Stockholm", + "Europe/Tallinn", + "Europe/Tirane", + "Europe/Tiraspol", + "Europe/Ulyanovsk", + "Europe/Uzhgorod", + "Europe/Vaduz", + "Europe/Vatican", + "Europe/Vienna", + "Europe/Vilnius", + "Europe/Volgograd", + "Europe/Warsaw", + "Europe/Zagreb", + "Europe/Zaporozhye", + "Europe/Zurich", + "GB", + "GB-Eire", + "GMT", + "GMT+0", + "GMT-0", + "GMT0", + "Greenwich", + "HST", + "Hongkong", + "Iceland", + "Indian/Antananarivo", + "Indian/Chagos", + "Indian/Christmas", + "Indian/Cocos", + "Indian/Comoro", + "Indian/Kerguelen", + "Indian/Mahe", + "Indian/Maldives", + "Indian/Mauritius", + "Indian/Mayotte", + "Indian/Reunion", + "Iran", + "Israel", + "Jamaica", + "Japan", + "Kwajalein", + "Libya", + "MET", + "MST", + "MST7MDT", + "Mexico/BajaNorte", + "Mexico/BajaSur", + "Mexico/General", + "NZ", + "NZ-CHAT", + "Navajo", + "PRC", + "PST8PDT", + "Pacific/Apia", + "Pacific/Auckland", + "Pacific/Bougainville", + "Pacific/Chatham", + "Pacific/Chuuk", + "Pacific/Easter", + "Pacific/Efate", + "Pacific/Enderbury", + "Pacific/Fakaofo", + "Pacific/Fiji", + "Pacific/Funafuti", + "Pacific/Galapagos", + "Pacific/Gambier", + "Pacific/Guadalcanal", + "Pacific/Guam", + "Pacific/Honolulu", + "Pacific/Johnston", + "Pacific/Kiritimati", + "Pacific/Kosrae", + "Pacific/Kwajalein", + "Pacific/Majuro", + "Pacific/Marquesas", + "Pacific/Midway", + "Pacific/Nauru", + "Pacific/Niue", + "Pacific/Norfolk", + "Pacific/Noumea", + "Pacific/Pago_Pago", + "Pacific/Palau", + "Pacific/Pitcairn", + "Pacific/Pohnpei", + "Pacific/Ponape", + "Pacific/Port_Moresby", + "Pacific/Rarotonga", + "Pacific/Saipan", + "Pacific/Samoa", + "Pacific/Tahiti", + "Pacific/Tarawa", + "Pacific/Tongatapu", + "Pacific/Truk", + "Pacific/Wake", + "Pacific/Wallis", + "Pacific/Yap", + "Poland", + "Portugal", + "ROC", + "ROK", + "Singapore", + "Turkey", + "UCT", + "US/Alaska", + "US/Aleutian", + "US/Arizona", + "US/Central", + "US/East-Indiana", + "US/Eastern", + "US/Hawaii", + "US/Indiana-Starke", + "US/Michigan", + "US/Mountain", + "US/Pacific", + "US/Samoa", + "UTC", + "Universal", + "W-SU", + "WET", + "Zulu", + nullptr}; + +// Helper to return a loaded time zone by value (UTC on error). +time_zone LoadZone(const std::string& name) { + time_zone tz; + load_time_zone(name, &tz); + return tz; +} + +// This helper is a macro so that failed expectations show up with the +// correct line numbers. +#define ExpectTime(tp, tz, y, m, d, hh, mm, ss, off, isdst, zone) \ + do { \ + time_zone::absolute_lookup al = tz.lookup(tp); \ + EXPECT_EQ(y, al.cs.year()); \ + EXPECT_EQ(m, al.cs.month()); \ + EXPECT_EQ(d, al.cs.day()); \ + EXPECT_EQ(hh, al.cs.hour()); \ + EXPECT_EQ(mm, al.cs.minute()); \ + EXPECT_EQ(ss, al.cs.second()); \ + EXPECT_EQ(off, al.offset); \ + EXPECT_TRUE(isdst == al.is_dst); \ + /* EXPECT_STREQ(zone, al.abbr); */ \ + } while (0) + +// These tests sometimes run on platforms that have zoneinfo data so old +// that the transition we are attempting to check does not exist, most +// notably Android emulators. Fortunately, AndroidZoneInfoSource supports +// time_zone::version() so, in cases where we've learned that it matters, +// we can make the check conditionally. +int VersionCmp(time_zone tz, const std::string& target) { + std::string version = tz.version(); + if (version.empty() && !target.empty()) return 1; // unknown > known + return version.compare(target); +} + +} // namespace + +#if !defined(__EMSCRIPTEN__) +TEST(TimeZones, LoadZonesConcurrently) { + std::promise<void> ready_promise; + std::shared_future<void> ready_future(ready_promise.get_future()); + auto load_zones = [ready_future](std::promise<void>* started, + std::set<std::string>* failures) { + started->set_value(); + ready_future.wait(); + for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) { + std::string zone = *np; + time_zone tz; + if (load_time_zone(zone, &tz)) { + EXPECT_EQ(zone, tz.name()); + } else { + failures->insert(zone); + } + } + }; + + const std::size_t n_threads = 128; + std::vector<std::thread> threads; + std::vector<std::set<std::string>> thread_failures(n_threads); + for (std::size_t i = 0; i != n_threads; ++i) { + std::promise<void> started; + threads.emplace_back(load_zones, &started, &thread_failures[i]); + started.get_future().wait(); + } + ready_promise.set_value(); + for (auto& thread : threads) { + thread.join(); + } + + // Allow a small number of failures to account for skew between + // the contents of kTimeZoneNames and the zoneinfo data source. +#if defined(__ANDROID__) + // Cater to the possibility of using an even older zoneinfo data + // source when running on Android, where it is difficult to override + // the bionic tzdata provided by the test environment. + const std::size_t max_failures = 20; +#else + const std::size_t max_failures = 3; +#endif + std::set<std::string> failures; + for (const auto& thread_failure : thread_failures) { + failures.insert(thread_failure.begin(), thread_failure.end()); + } + EXPECT_LE(failures.size(), max_failures) << testing::PrintToString(failures); +} +#endif + +TEST(TimeZone, NamedTimeZones) { + const time_zone utc = utc_time_zone(); + EXPECT_EQ("UTC", utc.name()); + const time_zone nyc = LoadZone("America/New_York"); + EXPECT_EQ("America/New_York", nyc.name()); + const time_zone syd = LoadZone("Australia/Sydney"); + EXPECT_EQ("Australia/Sydney", syd.name()); + const time_zone fixed0 = + fixed_time_zone(absl::time_internal::cctz::seconds::zero()); + EXPECT_EQ("UTC", fixed0.name()); + const time_zone fixed_pos = fixed_time_zone( + chrono::hours(3) + chrono::minutes(25) + chrono::seconds(45)); + EXPECT_EQ("Fixed/UTC+03:25:45", fixed_pos.name()); + const time_zone fixed_neg = fixed_time_zone( + -(chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56))); + EXPECT_EQ("Fixed/UTC-12:34:56", fixed_neg.name()); +} + +TEST(TimeZone, Failures) { + time_zone tz; + EXPECT_FALSE(load_time_zone(":America/Los_Angeles", &tz)); + + tz = LoadZone("America/Los_Angeles"); + EXPECT_FALSE(load_time_zone("Invalid/TimeZone", &tz)); + EXPECT_EQ(chrono::system_clock::from_time_t(0), + convert(civil_second(1970, 1, 1, 0, 0, 0), tz)); // UTC + + // Ensures that the load still fails on a subsequent attempt. + tz = LoadZone("America/Los_Angeles"); + EXPECT_FALSE(load_time_zone("Invalid/TimeZone", &tz)); + EXPECT_EQ(chrono::system_clock::from_time_t(0), + convert(civil_second(1970, 1, 1, 0, 0, 0), tz)); // UTC + + // Loading an empty std::string timezone should fail. + tz = LoadZone("America/Los_Angeles"); + EXPECT_FALSE(load_time_zone("", &tz)); + EXPECT_EQ(chrono::system_clock::from_time_t(0), + convert(civil_second(1970, 1, 1, 0, 0, 0), tz)); // UTC +} + +TEST(TimeZone, Equality) { + const time_zone a; + const time_zone b; + EXPECT_EQ(a, b); + EXPECT_EQ(a.name(), b.name()); + + const time_zone implicit_utc; + const time_zone explicit_utc = utc_time_zone(); + EXPECT_EQ(implicit_utc, explicit_utc); + EXPECT_EQ(implicit_utc.name(), explicit_utc.name()); + + const time_zone fixed_zero = + fixed_time_zone(absl::time_internal::cctz::seconds::zero()); + EXPECT_EQ(fixed_zero, LoadZone(fixed_zero.name())); + EXPECT_EQ(fixed_zero, explicit_utc); + + const time_zone fixed_utc = LoadZone("Fixed/UTC+00:00:00"); + EXPECT_EQ(fixed_utc, LoadZone(fixed_utc.name())); + EXPECT_EQ(fixed_utc, explicit_utc); + + const time_zone fixed_pos = fixed_time_zone( + chrono::hours(3) + chrono::minutes(25) + chrono::seconds(45)); + EXPECT_EQ(fixed_pos, LoadZone(fixed_pos.name())); + EXPECT_NE(fixed_pos, explicit_utc); + const time_zone fixed_neg = fixed_time_zone( + -(chrono::hours(12) + chrono::minutes(34) + chrono::seconds(56))); + EXPECT_EQ(fixed_neg, LoadZone(fixed_neg.name())); + EXPECT_NE(fixed_neg, explicit_utc); + + const time_zone fixed_lim = fixed_time_zone(chrono::hours(24)); + EXPECT_EQ(fixed_lim, LoadZone(fixed_lim.name())); + EXPECT_NE(fixed_lim, explicit_utc); + const time_zone fixed_ovfl = + fixed_time_zone(chrono::hours(24) + chrono::seconds(1)); + EXPECT_EQ(fixed_ovfl, LoadZone(fixed_ovfl.name())); + EXPECT_EQ(fixed_ovfl, explicit_utc); + + EXPECT_EQ(fixed_time_zone(chrono::seconds(1)), + fixed_time_zone(chrono::seconds(1))); + + const time_zone local = local_time_zone(); + EXPECT_EQ(local, LoadZone(local.name())); + + time_zone la = LoadZone("America/Los_Angeles"); + time_zone nyc = LoadZone("America/New_York"); + EXPECT_NE(la, nyc); +} + +TEST(StdChronoTimePoint, TimeTAlignment) { + // Ensures that the Unix epoch and the system clock epoch are an integral + // number of seconds apart. This simplifies conversions to/from time_t. + auto diff = + chrono::system_clock::time_point() - chrono::system_clock::from_time_t(0); + EXPECT_EQ(chrono::system_clock::time_point::duration::zero(), + diff % chrono::seconds(1)); +} + +TEST(BreakTime, TimePointResolution) { + const time_zone utc = utc_time_zone(); + const auto t0 = chrono::system_clock::from_time_t(0); + + ExpectTime(chrono::time_point_cast<chrono::nanoseconds>(t0), utc, 1970, 1, 1, + 0, 0, 0, 0, false, "UTC"); + ExpectTime(chrono::time_point_cast<chrono::microseconds>(t0), utc, 1970, 1, 1, + 0, 0, 0, 0, false, "UTC"); + ExpectTime(chrono::time_point_cast<chrono::milliseconds>(t0), utc, 1970, 1, 1, + 0, 0, 0, 0, false, "UTC"); + ExpectTime(chrono::time_point_cast<chrono::seconds>(t0), utc, 1970, 1, 1, 0, + 0, 0, 0, false, "UTC"); + ExpectTime(chrono::time_point_cast<absl::time_internal::cctz::seconds>(t0), + utc, 1970, 1, 1, 0, 0, 0, 0, false, "UTC"); + ExpectTime(chrono::time_point_cast<chrono::minutes>(t0), utc, 1970, 1, 1, 0, + 0, 0, 0, false, "UTC"); + ExpectTime(chrono::time_point_cast<chrono::hours>(t0), utc, 1970, 1, 1, 0, 0, + 0, 0, false, "UTC"); +} + +TEST(BreakTime, LocalTimeInUTC) { + const time_zone tz = utc_time_zone(); + const auto tp = chrono::system_clock::from_time_t(0); + ExpectTime(tp, tz, 1970, 1, 1, 0, 0, 0, 0, false, "UTC"); + EXPECT_EQ(weekday::thursday, get_weekday(convert(tp, tz))); +} + +TEST(BreakTime, LocalTimeInUTCUnaligned) { + const time_zone tz = utc_time_zone(); + const auto tp = + chrono::system_clock::from_time_t(0) - chrono::milliseconds(500); + ExpectTime(tp, tz, 1969, 12, 31, 23, 59, 59, 0, false, "UTC"); + EXPECT_EQ(weekday::wednesday, get_weekday(convert(tp, tz))); +} + +TEST(BreakTime, LocalTimePosix) { + // See IEEE Std 1003.1-1988 B.2.3 General Terms, Epoch. + const time_zone tz = utc_time_zone(); + const auto tp = chrono::system_clock::from_time_t(536457599); + ExpectTime(tp, tz, 1986, 12, 31, 23, 59, 59, 0, false, "UTC"); + EXPECT_EQ(weekday::wednesday, get_weekday(convert(tp, tz))); +} + +TEST(TimeZoneImpl, LocalTimeInFixed) { + const absl::time_internal::cctz::seconds offset = + -(chrono::hours(8) + chrono::minutes(33) + chrono::seconds(47)); + const time_zone tz = fixed_time_zone(offset); + const auto tp = chrono::system_clock::from_time_t(0); + ExpectTime(tp, tz, 1969, 12, 31, 15, 26, 13, offset.count(), false, + "-083347"); + EXPECT_EQ(weekday::wednesday, get_weekday(convert(tp, tz))); +} + +TEST(BreakTime, LocalTimeInNewYork) { + const time_zone tz = LoadZone("America/New_York"); + const auto tp = chrono::system_clock::from_time_t(45); + ExpectTime(tp, tz, 1969, 12, 31, 19, 0, 45, -5 * 60 * 60, false, "EST"); + EXPECT_EQ(weekday::wednesday, get_weekday(convert(tp, tz))); +} + +TEST(BreakTime, LocalTimeInMTV) { + const time_zone tz = LoadZone("America/Los_Angeles"); + const auto tp = chrono::system_clock::from_time_t(1380855729); + ExpectTime(tp, tz, 2013, 10, 3, 20, 2, 9, -7 * 60 * 60, true, "PDT"); + EXPECT_EQ(weekday::thursday, get_weekday(convert(tp, tz))); +} + +TEST(BreakTime, LocalTimeInSydney) { + const time_zone tz = LoadZone("Australia/Sydney"); + const auto tp = chrono::system_clock::from_time_t(90); + ExpectTime(tp, tz, 1970, 1, 1, 10, 1, 30, 10 * 60 * 60, false, "AEST"); + EXPECT_EQ(weekday::thursday, get_weekday(convert(tp, tz))); +} + +TEST(MakeTime, TimePointResolution) { + const time_zone utc = utc_time_zone(); + const time_point<chrono::nanoseconds> tp_ns = + convert(civil_second(2015, 1, 2, 3, 4, 5), utc); + EXPECT_EQ("04:05", format("%M:%E*S", tp_ns, utc)); + const time_point<chrono::microseconds> tp_us = + convert(civil_second(2015, 1, 2, 3, 4, 5), utc); + EXPECT_EQ("04:05", format("%M:%E*S", tp_us, utc)); + const time_point<chrono::milliseconds> tp_ms = + convert(civil_second(2015, 1, 2, 3, 4, 5), utc); + EXPECT_EQ("04:05", format("%M:%E*S", tp_ms, utc)); + const time_point<chrono::seconds> tp_s = + convert(civil_second(2015, 1, 2, 3, 4, 5), utc); + EXPECT_EQ("04:05", format("%M:%E*S", tp_s, utc)); + const time_point<absl::time_internal::cctz::seconds> tp_s64 = + convert(civil_second(2015, 1, 2, 3, 4, 5), utc); + EXPECT_EQ("04:05", format("%M:%E*S", tp_s64, utc)); + + // These next two require chrono::time_point_cast because the conversion + // from a resolution of seconds (the return value of convert()) to a + // coarser resolution requires an explicit cast. + const time_point<chrono::minutes> tp_m = + chrono::time_point_cast<chrono::minutes>( + convert(civil_second(2015, 1, 2, 3, 4, 5), utc)); + EXPECT_EQ("04:00", format("%M:%E*S", tp_m, utc)); + const time_point<chrono::hours> tp_h = chrono::time_point_cast<chrono::hours>( + convert(civil_second(2015, 1, 2, 3, 4, 5), utc)); + EXPECT_EQ("00:00", format("%M:%E*S", tp_h, utc)); +} + +TEST(MakeTime, Normalization) { + const time_zone tz = LoadZone("America/New_York"); + const auto tp = convert(civil_second(2009, 2, 13, 18, 31, 30), tz); + EXPECT_EQ(chrono::system_clock::from_time_t(1234567890), tp); + + // Now requests for the same time_point but with out-of-range fields. + EXPECT_EQ(tp, convert(civil_second(2008, 14, 13, 18, 31, 30), tz)); // month + EXPECT_EQ(tp, convert(civil_second(2009, 1, 44, 18, 31, 30), tz)); // day + EXPECT_EQ(tp, convert(civil_second(2009, 2, 12, 42, 31, 30), tz)); // hour + EXPECT_EQ(tp, convert(civil_second(2009, 2, 13, 17, 91, 30), tz)); // minute + EXPECT_EQ(tp, convert(civil_second(2009, 2, 13, 18, 30, 90), tz)); // second +} + +// NOTE: Run this with -ftrapv to detect overflow problems. +TEST(MakeTime, SysSecondsLimits) { + const char RFC3339[] = "%Y-%m-%dT%H:%M:%S%Ez"; + const time_zone utc = utc_time_zone(); + const time_zone east = fixed_time_zone(chrono::hours(14)); + const time_zone west = fixed_time_zone(-chrono::hours(14)); + time_point<absl::time_internal::cctz::seconds> tp; + + // Approach the maximal time_point<cctz::seconds> value from below. + tp = convert(civil_second(292277026596, 12, 4, 15, 30, 6), utc); + EXPECT_EQ("292277026596-12-04T15:30:06+00:00", format(RFC3339, tp, utc)); + tp = convert(civil_second(292277026596, 12, 4, 15, 30, 7), utc); + EXPECT_EQ("292277026596-12-04T15:30:07+00:00", format(RFC3339, tp, utc)); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + tp = convert(civil_second(292277026596, 12, 4, 15, 30, 8), utc); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + tp = convert(civil_second::max(), utc); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + + // Checks that we can also get the maximal value for a far-east zone. + tp = convert(civil_second(292277026596, 12, 5, 5, 30, 7), east); + EXPECT_EQ("292277026596-12-05T05:30:07+14:00", format(RFC3339, tp, east)); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + tp = convert(civil_second(292277026596, 12, 5, 5, 30, 8), east); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + tp = convert(civil_second::max(), east); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + + // Checks that we can also get the maximal value for a far-west zone. + tp = convert(civil_second(292277026596, 12, 4, 1, 30, 7), west); + EXPECT_EQ("292277026596-12-04T01:30:07-14:00", format(RFC3339, tp, west)); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + tp = convert(civil_second(292277026596, 12, 4, 7, 30, 8), west); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + tp = convert(civil_second::max(), west); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::max(), tp); + + // Approach the minimal time_point<cctz::seconds> value from above. + tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 53), utc); + EXPECT_EQ("-292277022657-01-27T08:29:53+00:00", format(RFC3339, tp, utc)); + tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 52), utc); + EXPECT_EQ("-292277022657-01-27T08:29:52+00:00", format(RFC3339, tp, utc)); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + tp = convert(civil_second(-292277022657, 1, 27, 8, 29, 51), utc); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + tp = convert(civil_second::min(), utc); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + + // Checks that we can also get the minimal value for a far-east zone. + tp = convert(civil_second(-292277022657, 1, 27, 22, 29, 52), east); + EXPECT_EQ("-292277022657-01-27T22:29:52+14:00", format(RFC3339, tp, east)); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + tp = convert(civil_second(-292277022657, 1, 27, 22, 29, 51), east); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + tp = convert(civil_second::min(), east); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + + // Checks that we can also get the minimal value for a far-west zone. + tp = convert(civil_second(-292277022657, 1, 26, 18, 29, 52), west); + EXPECT_EQ("-292277022657-01-26T18:29:52-14:00", format(RFC3339, tp, west)); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + tp = convert(civil_second(-292277022657, 1, 26, 18, 29, 51), west); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + tp = convert(civil_second::min(), west); + EXPECT_EQ(time_point<absl::time_internal::cctz::seconds>::min(), tp); + + // Some similar checks for the "libc" time-zone implementation. + if (sizeof(std::time_t) >= 8) { + // Checks that "tm_year + 1900", as used by the "libc" implementation, + // can produce year values beyond the range on an int without overflow. +#if defined(_WIN32) || defined(_WIN64) + // localtime_s() and gmtime_s() don't believe in years outside [1970:3000]. +#else + const time_zone utc = LoadZone("libc:UTC"); + const year_t max_tm_year = year_t{std::numeric_limits<int>::max()} + 1900; + tp = convert(civil_second(max_tm_year, 12, 31, 23, 59, 59), utc); + EXPECT_EQ("2147485547-12-31T23:59:59+00:00", format(RFC3339, tp, utc)); + const year_t min_tm_year = year_t{std::numeric_limits<int>::min()} + 1900; + tp = convert(civil_second(min_tm_year, 1, 1, 0, 0, 0), utc); + EXPECT_EQ("-2147481748-01-01T00:00:00+00:00", format(RFC3339, tp, utc)); +#endif + } +} + +TEST(MakeTime, LocalTimeLibC) { + // Checks that cctz and libc agree on transition points in [1970:2037]. + // + // We limit this test case to environments where: + // 1) we know how to change the time zone used by localtime()/mktime(), + // 2) cctz and localtime()/mktime() will use similar-enough tzdata, and + // 3) we have some idea about how mktime() behaves during transitions. +#if defined(__linux__) && !defined(__ANDROID__) + const char* const ep = getenv("TZ"); + std::string tz_name = (ep != nullptr) ? ep : ""; + for (const char* const* np = kTimeZoneNames; *np != nullptr; ++np) { + ASSERT_EQ(0, setenv("TZ", *np, 1)); // change what "localtime" means + const auto zi = local_time_zone(); + const auto lc = LoadZone("libc:localtime"); + time_zone::civil_transition transition; + for (auto tp = zi.lookup(civil_second()).trans; + zi.next_transition(tp, &transition); + tp = zi.lookup(transition.to).trans) { + const auto fcl = zi.lookup(transition.from); + const auto tcl = zi.lookup(transition.to); + civil_second cs; // compare cs in zi and lc + if (fcl.kind == time_zone::civil_lookup::UNIQUE) { + if (tcl.kind == time_zone::civil_lookup::UNIQUE) { + // Both unique; must be an is_dst or abbr change. + ASSERT_EQ(transition.from, transition.to); + const auto trans = fcl.trans; + const auto tal = zi.lookup(trans); + const auto tprev = trans - absl::time_internal::cctz::seconds(1); + const auto pal = zi.lookup(tprev); + if (pal.is_dst == tal.is_dst) { + ASSERT_STRNE(pal.abbr, tal.abbr); + } + continue; + } + ASSERT_EQ(time_zone::civil_lookup::REPEATED, tcl.kind); + cs = transition.to; + } else { + ASSERT_EQ(time_zone::civil_lookup::UNIQUE, tcl.kind); + ASSERT_EQ(time_zone::civil_lookup::SKIPPED, fcl.kind); + cs = transition.from; + } + if (cs.year() > 2037) break; // limit test time (and to 32-bit time_t) + const auto cl_zi = zi.lookup(cs); + if (zi.lookup(cl_zi.pre).is_dst == zi.lookup(cl_zi.post).is_dst) { + // The "libc" implementation cannot correctly classify transitions + // that don't change the "tm_isdst" flag. In Europe/Volgograd, for + // example, there is a SKIPPED transition from +03 to +04 with dst=F + // on both sides ... + // 1540681199 = 2018-10-28 01:59:59 +03:00:00 [dst=F off=10800] + // 1540681200 = 2018-10-28 03:00:00 +04:00:00 [dst=F off=14400] + // but std::mktime(2018-10-28 02:00:00, tm_isdst=0) fails, unlike, + // say, the similar Europe/Chisinau transition from +02 to +03 ... + // 1521935999 = 2018-03-25 01:59:59 +02:00:00 [dst=F off=7200] + // 1521936000 = 2018-03-25 03:00:00 +03:00:00 [dst=T off=10800] + // where std::mktime(2018-03-25 02:00:00, tm_isdst=0) succeeds and + // returns 1521936000. + continue; + } + if (cs == civil_second(2037, 10, 4, 2, 0, 0)) { + const std::string tzname = *np; + if (tzname == "Africa/Casablanca" || tzname == "Africa/El_Aaiun") { + // The "libc" implementation gets this transition wrong (at least + // until 2018g when it was removed), returning an offset of 3600 + // instead of 0. TODO: Revert this when 2018g is ubiquitous. + continue; + } + } + const auto cl_lc = lc.lookup(cs); + SCOPED_TRACE(testing::Message() << "For " << cs << " in " << *np); + EXPECT_EQ(cl_zi.kind, cl_lc.kind); + EXPECT_EQ(cl_zi.pre, cl_lc.pre); + EXPECT_EQ(cl_zi.trans, cl_lc.trans); + EXPECT_EQ(cl_zi.post, cl_lc.post); + } + } + if (ep == nullptr) { + ASSERT_EQ(0, unsetenv("TZ")); + } else { + ASSERT_EQ(0, setenv("TZ", tz_name.c_str(), 1)); + } +#endif +} + +TEST(NextTransition, UTC) { + const auto tz = utc_time_zone(); + time_zone::civil_transition trans; + + auto tp = time_point<absl::time_internal::cctz::seconds>::min(); + EXPECT_FALSE(tz.next_transition(tp, &trans)); + + tp = time_point<absl::time_internal::cctz::seconds>::max(); + EXPECT_FALSE(tz.next_transition(tp, &trans)); +} + +TEST(PrevTransition, UTC) { + const auto tz = utc_time_zone(); + time_zone::civil_transition trans; + + auto tp = time_point<absl::time_internal::cctz::seconds>::max(); + EXPECT_FALSE(tz.prev_transition(tp, &trans)); + + tp = time_point<absl::time_internal::cctz::seconds>::min(); + EXPECT_FALSE(tz.prev_transition(tp, &trans)); +} + +TEST(NextTransition, AmericaNewYork) { + const auto tz = LoadZone("America/New_York"); + time_zone::civil_transition trans; + + auto tp = convert(civil_second(2018, 6, 30, 0, 0, 0), tz); + EXPECT_TRUE(tz.next_transition(tp, &trans)); + EXPECT_EQ(civil_second(2018, 11, 4, 2, 0, 0), trans.from); + EXPECT_EQ(civil_second(2018, 11, 4, 1, 0, 0), trans.to); + + tp = time_point<absl::time_internal::cctz::seconds>::max(); + EXPECT_FALSE(tz.next_transition(tp, &trans)); + + tp = time_point<absl::time_internal::cctz::seconds>::min(); + EXPECT_TRUE(tz.next_transition(tp, &trans)); + if (trans.from == civil_second(1918, 3, 31, 2, 0, 0)) { + // It looks like the tzdata is only 32 bit (probably macOS), + // which bottoms out at 1901-12-13T20:45:52+00:00. + EXPECT_EQ(civil_second(1918, 3, 31, 3, 0, 0), trans.to); + } else { + EXPECT_EQ(civil_second(1883, 11, 18, 12, 3, 58), trans.from); + EXPECT_EQ(civil_second(1883, 11, 18, 12, 0, 0), trans.to); + } +} + +TEST(PrevTransition, AmericaNewYork) { + const auto tz = LoadZone("America/New_York"); + time_zone::civil_transition trans; + + auto tp = convert(civil_second(2018, 6, 30, 0, 0, 0), tz); + EXPECT_TRUE(tz.prev_transition(tp, &trans)); + EXPECT_EQ(civil_second(2018, 3, 11, 2, 0, 0), trans.from); + EXPECT_EQ(civil_second(2018, 3, 11, 3, 0, 0), trans.to); + + tp = time_point<absl::time_internal::cctz::seconds>::min(); + EXPECT_FALSE(tz.prev_transition(tp, &trans)); + + tp = time_point<absl::time_internal::cctz::seconds>::max(); + EXPECT_TRUE(tz.prev_transition(tp, &trans)); + // We have a transition but we don't know which one. +} + +TEST(TimeZoneEdgeCase, AmericaNewYork) { + const time_zone tz = LoadZone("America/New_York"); + + // Spring 1:59:59 -> 3:00:00 + auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz); + ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -5 * 3600, false, "EST"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 3, 10, 3, 0, 0, -4 * 3600, true, "EDT"); + + // Fall 1:59:59 -> 1:00:00 + tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz); + ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -4 * 3600, true, "EDT"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 11, 3, 1, 0, 0, -5 * 3600, false, "EST"); +} + +TEST(TimeZoneEdgeCase, AmericaLosAngeles) { + const time_zone tz = LoadZone("America/Los_Angeles"); + + // Spring 1:59:59 -> 3:00:00 + auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz); + ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -8 * 3600, false, "PST"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 3, 10, 3, 0, 0, -7 * 3600, true, "PDT"); + + // Fall 1:59:59 -> 1:00:00 + tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz); + ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -7 * 3600, true, "PDT"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 11, 3, 1, 0, 0, -8 * 3600, false, "PST"); +} + +TEST(TimeZoneEdgeCase, ArizonaNoTransition) { + const time_zone tz = LoadZone("America/Phoenix"); + + // No transition in Spring. + auto tp = convert(civil_second(2013, 3, 10, 1, 59, 59), tz); + ExpectTime(tp, tz, 2013, 3, 10, 1, 59, 59, -7 * 3600, false, "MST"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 3, 10, 2, 0, 0, -7 * 3600, false, "MST"); + + // No transition in Fall. + tp = convert(civil_second(2013, 11, 3, 1, 59, 59), tz); + ExpectTime(tp, tz, 2013, 11, 3, 1, 59, 59, -7 * 3600, false, "MST"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 11, 3, 2, 0, 0, -7 * 3600, false, "MST"); +} + +TEST(TimeZoneEdgeCase, AsiaKathmandu) { + const time_zone tz = LoadZone("Asia/Kathmandu"); + + // A non-DST offset change from +0530 to +0545 + // + // 504901799 == Tue, 31 Dec 1985 23:59:59 +0530 (+0530) + // 504901800 == Wed, 1 Jan 1986 00:15:00 +0545 (+0545) + auto tp = convert(civil_second(1985, 12, 31, 23, 59, 59), tz); + ExpectTime(tp, tz, 1985, 12, 31, 23, 59, 59, 5.5 * 3600, false, "+0530"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 1986, 1, 1, 0, 15, 0, 5.75 * 3600, false, "+0545"); +} + +TEST(TimeZoneEdgeCase, PacificChatham) { + const time_zone tz = LoadZone("Pacific/Chatham"); + + // One-hour DST offset changes, but at atypical values + // + // 1365256799 == Sun, 7 Apr 2013 03:44:59 +1345 (+1345) + // 1365256800 == Sun, 7 Apr 2013 02:45:00 +1245 (+1245) + auto tp = convert(civil_second(2013, 4, 7, 3, 44, 59), tz); + ExpectTime(tp, tz, 2013, 4, 7, 3, 44, 59, 13.75 * 3600, true, "+1345"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 4, 7, 2, 45, 0, 12.75 * 3600, false, "+1245"); + + // 1380376799 == Sun, 29 Sep 2013 02:44:59 +1245 (+1245) + // 1380376800 == Sun, 29 Sep 2013 03:45:00 +1345 (+1345) + tp = convert(civil_second(2013, 9, 29, 2, 44, 59), tz); + ExpectTime(tp, tz, 2013, 9, 29, 2, 44, 59, 12.75 * 3600, false, "+1245"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 9, 29, 3, 45, 0, 13.75 * 3600, true, "+1345"); +} + +TEST(TimeZoneEdgeCase, AustraliaLordHowe) { + const time_zone tz = LoadZone("Australia/Lord_Howe"); + + // Half-hour DST offset changes + // + // 1365260399 == Sun, 7 Apr 2013 01:59:59 +1100 (+11) + // 1365260400 == Sun, 7 Apr 2013 01:30:00 +1030 (+1030) + auto tp = convert(civil_second(2013, 4, 7, 1, 59, 59), tz); + ExpectTime(tp, tz, 2013, 4, 7, 1, 59, 59, 11 * 3600, true, "+11"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 4, 7, 1, 30, 0, 10.5 * 3600, false, "+1030"); + + // 1380986999 == Sun, 6 Oct 2013 01:59:59 +1030 (+1030) + // 1380987000 == Sun, 6 Oct 2013 02:30:00 +1100 (+11) + tp = convert(civil_second(2013, 10, 6, 1, 59, 59), tz); + ExpectTime(tp, tz, 2013, 10, 6, 1, 59, 59, 10.5 * 3600, false, "+1030"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2013, 10, 6, 2, 30, 0, 11 * 3600, true, "+11"); +} + +TEST(TimeZoneEdgeCase, PacificApia) { + const time_zone tz = LoadZone("Pacific/Apia"); + + // At the end of December 2011, Samoa jumped forward by one day, + // skipping 30 December from the local calendar, when the nation + // moved to the west of the International Date Line. + // + // A one-day, non-DST offset change + // + // 1325239199 == Thu, 29 Dec 2011 23:59:59 -1000 (-10) + // 1325239200 == Sat, 31 Dec 2011 00:00:00 +1400 (+14) + auto tp = convert(civil_second(2011, 12, 29, 23, 59, 59), tz); + ExpectTime(tp, tz, 2011, 12, 29, 23, 59, 59, -10 * 3600, true, "-10"); + EXPECT_EQ(363, get_yearday(convert(tp, tz))); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2011, 12, 31, 0, 0, 0, 14 * 3600, true, "+14"); + EXPECT_EQ(365, get_yearday(convert(tp, tz))); +} + +TEST(TimeZoneEdgeCase, AfricaCairo) { + const time_zone tz = LoadZone("Africa/Cairo"); + + if (VersionCmp(tz, "2014c") >= 0) { + // An interesting case of midnight not existing. + // + // 1400191199 == Thu, 15 May 2014 23:59:59 +0200 (EET) + // 1400191200 == Fri, 16 May 2014 01:00:00 +0300 (EEST) + auto tp = convert(civil_second(2014, 5, 15, 23, 59, 59), tz); + ExpectTime(tp, tz, 2014, 5, 15, 23, 59, 59, 2 * 3600, false, "EET"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2014, 5, 16, 1, 0, 0, 3 * 3600, true, "EEST"); + } +} + +TEST(TimeZoneEdgeCase, AfricaMonrovia) { + const time_zone tz = LoadZone("Africa/Monrovia"); + + if (VersionCmp(tz, "2017b") >= 0) { + // Strange offset change -00:44:30 -> +00:00:00 (non-DST) + // + // 63593069 == Thu, 6 Jan 1972 23:59:59 -0044 (MMT) + // 63593070 == Fri, 7 Jan 1972 00:44:30 +0000 (GMT) + auto tp = convert(civil_second(1972, 1, 6, 23, 59, 59), tz); + ExpectTime(tp, tz, 1972, 1, 6, 23, 59, 59, -44.5 * 60, false, "MMT"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 1972, 1, 7, 0, 44, 30, 0 * 60, false, "GMT"); + } +} + +TEST(TimeZoneEdgeCase, AmericaJamaica) { + // Jamaica discontinued DST transitions in 1983, and is now at a + // constant -0500. This makes it an interesting edge-case target. + // Note that the 32-bit times used in a (tzh_version == 0) zoneinfo + // file cannot represent the abbreviation-only transition of 1890, + // so we ignore the abbreviation by expecting what we received. + const time_zone tz = LoadZone("America/Jamaica"); + + // Before the first transition. + if (!tz.version().empty() && VersionCmp(tz, "2018d") >= 0) { + // We avoid the expectations on the -18430 offset below unless we are + // certain we have commit 907241e (Fix off-by-1 error for Jamaica and + // T&C before 1913) from 2018d. TODO: Remove the "version() not empty" + // part when 2018d is generally available from /usr/share/zoneinfo. + auto tp = convert(civil_second(1889, 12, 31, 0, 0, 0), tz); + ExpectTime(tp, tz, 1889, 12, 31, 0, 0, 0, -18430, false, + tz.lookup(tp).abbr); + + // Over the first (abbreviation-change only) transition. + // -2524503170 == Tue, 31 Dec 1889 23:59:59 -0507 (LMT) + // -2524503169 == Wed, 1 Jan 1890 00:00:00 -0507 (KMT) + tp = convert(civil_second(1889, 12, 31, 23, 59, 59), tz); + ExpectTime(tp, tz, 1889, 12, 31, 23, 59, 59, -18430, false, + tz.lookup(tp).abbr); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 1890, 1, 1, 0, 0, 0, -18430, false, "KMT"); + } + + // Over the last (DST) transition. + // 436341599 == Sun, 30 Oct 1983 01:59:59 -0400 (EDT) + // 436341600 == Sun, 30 Oct 1983 01:00:00 -0500 (EST) + auto tp = convert(civil_second(1983, 10, 30, 1, 59, 59), tz); + ExpectTime(tp, tz, 1983, 10, 30, 1, 59, 59, -4 * 3600, true, "EDT"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 1983, 10, 30, 1, 0, 0, -5 * 3600, false, "EST"); + + // After the last transition. + tp = convert(civil_second(1983, 12, 31, 23, 59, 59), tz); + ExpectTime(tp, tz, 1983, 12, 31, 23, 59, 59, -5 * 3600, false, "EST"); +} + +TEST(TimeZoneEdgeCase, WET) { + // Cover some non-existent times within forward transitions. + const time_zone tz = LoadZone("WET"); + + // Before the first transition. + auto tp = convert(civil_second(1977, 1, 1, 0, 0, 0), tz); + ExpectTime(tp, tz, 1977, 1, 1, 0, 0, 0, 0, false, "WET"); + + // Over the first transition. + // 228877199 == Sun, 3 Apr 1977 00:59:59 +0000 (WET) + // 228877200 == Sun, 3 Apr 1977 02:00:00 +0100 (WEST) + tp = convert(civil_second(1977, 4, 3, 0, 59, 59), tz); + ExpectTime(tp, tz, 1977, 4, 3, 0, 59, 59, 0, false, "WET"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 1977, 4, 3, 2, 0, 0, 1 * 3600, true, "WEST"); + + // A non-existent time within the first transition. + time_zone::civil_lookup cl1 = tz.lookup(civil_second(1977, 4, 3, 1, 15, 0)); + EXPECT_EQ(time_zone::civil_lookup::SKIPPED, cl1.kind); + ExpectTime(cl1.pre, tz, 1977, 4, 3, 2, 15, 0, 1 * 3600, true, "WEST"); + ExpectTime(cl1.trans, tz, 1977, 4, 3, 2, 0, 0, 1 * 3600, true, "WEST"); + ExpectTime(cl1.post, tz, 1977, 4, 3, 0, 15, 0, 0 * 3600, false, "WET"); + + // A non-existent time within the second forward transition. + time_zone::civil_lookup cl2 = tz.lookup(civil_second(1978, 4, 2, 1, 15, 0)); + EXPECT_EQ(time_zone::civil_lookup::SKIPPED, cl2.kind); + ExpectTime(cl2.pre, tz, 1978, 4, 2, 2, 15, 0, 1 * 3600, true, "WEST"); + ExpectTime(cl2.trans, tz, 1978, 4, 2, 2, 0, 0, 1 * 3600, true, "WEST"); + ExpectTime(cl2.post, tz, 1978, 4, 2, 0, 15, 0, 0 * 3600, false, "WET"); +} + +TEST(TimeZoneEdgeCase, FixedOffsets) { + const time_zone gmtm5 = LoadZone("Etc/GMT+5"); // -0500 + auto tp = convert(civil_second(1970, 1, 1, 0, 0, 0), gmtm5); + ExpectTime(tp, gmtm5, 1970, 1, 1, 0, 0, 0, -5 * 3600, false, "-05"); + EXPECT_EQ(chrono::system_clock::from_time_t(5 * 3600), tp); + + const time_zone gmtp5 = LoadZone("Etc/GMT-5"); // +0500 + tp = convert(civil_second(1970, 1, 1, 0, 0, 0), gmtp5); + ExpectTime(tp, gmtp5, 1970, 1, 1, 0, 0, 0, 5 * 3600, false, "+05"); + EXPECT_EQ(chrono::system_clock::from_time_t(-5 * 3600), tp); +} + +TEST(TimeZoneEdgeCase, NegativeYear) { + // Tests transition from year 0 (aka 1BCE) to year -1. + const time_zone tz = utc_time_zone(); + auto tp = convert(civil_second(0, 1, 1, 0, 0, 0), tz); + ExpectTime(tp, tz, 0, 1, 1, 0, 0, 0, 0 * 3600, false, "UTC"); + EXPECT_EQ(weekday::saturday, get_weekday(convert(tp, tz))); + tp -= absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, -1, 12, 31, 23, 59, 59, 0 * 3600, false, "UTC"); + EXPECT_EQ(weekday::friday, get_weekday(convert(tp, tz))); +} + +TEST(TimeZoneEdgeCase, UTC32bitLimit) { + const time_zone tz = utc_time_zone(); + + // Limits of signed 32-bit time_t + // + // 2147483647 == Tue, 19 Jan 2038 03:14:07 +0000 (UTC) + // 2147483648 == Tue, 19 Jan 2038 03:14:08 +0000 (UTC) + auto tp = convert(civil_second(2038, 1, 19, 3, 14, 7), tz); + ExpectTime(tp, tz, 2038, 1, 19, 3, 14, 7, 0 * 3600, false, "UTC"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 2038, 1, 19, 3, 14, 8, 0 * 3600, false, "UTC"); +} + +TEST(TimeZoneEdgeCase, UTC5DigitYear) { + const time_zone tz = utc_time_zone(); + + // Rollover to 5-digit year + // + // 253402300799 == Fri, 31 Dec 9999 23:59:59 +0000 (UTC) + // 253402300800 == Sat, 1 Jan 1000 00:00:00 +0000 (UTC) + auto tp = convert(civil_second(9999, 12, 31, 23, 59, 59), tz); + ExpectTime(tp, tz, 9999, 12, 31, 23, 59, 59, 0 * 3600, false, "UTC"); + tp += absl::time_internal::cctz::seconds(1); + ExpectTime(tp, tz, 10000, 1, 1, 0, 0, 0, 0 * 3600, false, "UTC"); +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_posix.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_posix.cc new file mode 100644 index 0000000000..5cdd09e89d --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_posix.cc @@ -0,0 +1,159 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "time_zone_posix.h" + +#include <cstddef> +#include <cstring> +#include <limits> +#include <string> + +#include "absl/base/config.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +namespace { + +const char kDigits[] = "0123456789"; + +const char* ParseInt(const char* p, int min, int max, int* vp) { + int value = 0; + const char* op = p; + const int kMaxInt = std::numeric_limits<int>::max(); + for (; const char* dp = strchr(kDigits, *p); ++p) { + int d = static_cast<int>(dp - kDigits); + if (d >= 10) break; // '\0' + if (value > kMaxInt / 10) return nullptr; + value *= 10; + if (value > kMaxInt - d) return nullptr; + value += d; + } + if (p == op || value < min || value > max) return nullptr; + *vp = value; + return p; +} + +// abbr = <.*?> | [^-+,\d]{3,} +const char* ParseAbbr(const char* p, std::string* abbr) { + const char* op = p; + if (*p == '<') { // special zoneinfo <...> form + while (*++p != '>') { + if (*p == '\0') return nullptr; + } + abbr->assign(op + 1, static_cast<std::size_t>(p - op) - 1); + return ++p; + } + while (*p != '\0') { + if (strchr("-+,", *p)) break; + if (strchr(kDigits, *p)) break; + ++p; + } + if (p - op < 3) return nullptr; + abbr->assign(op, static_cast<std::size_t>(p - op)); + return p; +} + +// offset = [+|-]hh[:mm[:ss]] (aggregated into single seconds value) +const char* ParseOffset(const char* p, int min_hour, int max_hour, int sign, + std::int_fast32_t* offset) { + if (p == nullptr) return nullptr; + if (*p == '+' || *p == '-') { + if (*p++ == '-') sign = -sign; + } + int hours = 0; + int minutes = 0; + int seconds = 0; + + p = ParseInt(p, min_hour, max_hour, &hours); + if (p == nullptr) return nullptr; + if (*p == ':') { + p = ParseInt(p + 1, 0, 59, &minutes); + if (p == nullptr) return nullptr; + if (*p == ':') { + p = ParseInt(p + 1, 0, 59, &seconds); + if (p == nullptr) return nullptr; + } + } + *offset = sign * ((((hours * 60) + minutes) * 60) + seconds); + return p; +} + +// datetime = ( Jn | n | Mm.w.d ) [ / offset ] +const char* ParseDateTime(const char* p, PosixTransition* res) { + if (p != nullptr && *p == ',') { + if (*++p == 'M') { + int month = 0; + if ((p = ParseInt(p + 1, 1, 12, &month)) != nullptr && *p == '.') { + int week = 0; + if ((p = ParseInt(p + 1, 1, 5, &week)) != nullptr && *p == '.') { + int weekday = 0; + if ((p = ParseInt(p + 1, 0, 6, &weekday)) != nullptr) { + res->date.fmt = PosixTransition::M; + res->date.m.month = static_cast<std::int_fast8_t>(month); + res->date.m.week = static_cast<std::int_fast8_t>(week); + res->date.m.weekday = static_cast<std::int_fast8_t>(weekday); + } + } + } + } else if (*p == 'J') { + int day = 0; + if ((p = ParseInt(p + 1, 1, 365, &day)) != nullptr) { + res->date.fmt = PosixTransition::J; + res->date.j.day = static_cast<std::int_fast16_t>(day); + } + } else { + int day = 0; + if ((p = ParseInt(p, 0, 365, &day)) != nullptr) { + res->date.fmt = PosixTransition::N; + res->date.n.day = static_cast<std::int_fast16_t>(day); + } + } + } + if (p != nullptr) { + res->time.offset = 2 * 60 * 60; // default offset is 02:00:00 + if (*p == '/') p = ParseOffset(p + 1, -167, 167, 1, &res->time.offset); + } + return p; +} + +} // namespace + +// spec = std offset [ dst [ offset ] , datetime , datetime ] +bool ParsePosixSpec(const std::string& spec, PosixTimeZone* res) { + const char* p = spec.c_str(); + if (*p == ':') return false; + + p = ParseAbbr(p, &res->std_abbr); + p = ParseOffset(p, 0, 24, -1, &res->std_offset); + if (p == nullptr) return false; + if (*p == '\0') return true; + + p = ParseAbbr(p, &res->dst_abbr); + if (p == nullptr) return false; + res->dst_offset = res->std_offset + (60 * 60); // default + if (*p != ',') p = ParseOffset(p, 0, 24, -1, &res->dst_offset); + + p = ParseDateTime(p, &res->dst_start); + p = ParseDateTime(p, &res->dst_end); + + return p != nullptr && *p == '\0'; +} + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_posix.h b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_posix.h new file mode 100644 index 0000000000..0cf29055f5 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_posix.h @@ -0,0 +1,132 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Parsing of a POSIX zone spec as described in the TZ part of section 8.3 in +// http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap08.html. +// +// The current POSIX spec for America/Los_Angeles is "PST8PDT,M3.2.0,M11.1.0", +// which would be broken down as ... +// +// PosixTimeZone { +// std_abbr = "PST" +// std_offset = -28800 +// dst_abbr = "PDT" +// dst_offset = -25200 +// dst_start = PosixTransition { +// date { +// m { +// month = 3 +// week = 2 +// weekday = 0 +// } +// } +// time { +// offset = 7200 +// } +// } +// dst_end = PosixTransition { +// date { +// m { +// month = 11 +// week = 1 +// weekday = 0 +// } +// } +// time { +// offset = 7200 +// } +// } +// } + +#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_POSIX_H_ +#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_POSIX_H_ + +#include <cstdint> +#include <string> + +#include "absl/base/config.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +// The date/time of the transition. The date is specified as either: +// (J) the Nth day of the year (1 <= N <= 365), excluding leap days, or +// (N) the Nth day of the year (0 <= N <= 365), including leap days, or +// (M) the Nth weekday of a month (e.g., the 2nd Sunday in March). +// The time, specified as a day offset, identifies the particular moment +// of the transition, and may be negative or >= 24h, and in which case +// it would take us to another day, and perhaps week, or even month. +struct PosixTransition { + enum DateFormat { J, N, M }; + + struct Date { + struct NonLeapDay { + std::int_fast16_t day; // day of non-leap year [1:365] + }; + struct Day { + std::int_fast16_t day; // day of year [0:365] + }; + struct MonthWeekWeekday { + std::int_fast8_t month; // month of year [1:12] + std::int_fast8_t week; // week of month [1:5] (5==last) + std::int_fast8_t weekday; // 0==Sun, ..., 6=Sat + }; + + DateFormat fmt; + + union { + NonLeapDay j; + Day n; + MonthWeekWeekday m; + }; + }; + + struct Time { + std::int_fast32_t offset; // seconds before/after 00:00:00 + }; + + Date date; + Time time; +}; + +// The entirety of a POSIX-string specified time-zone rule. The standard +// abbreviation and offset are always given. If the time zone includes +// daylight saving, then the daylight abbrevation is non-empty and the +// remaining fields are also valid. Note that the start/end transitions +// are not ordered---in the southern hemisphere the transition to end +// daylight time occurs first in any particular year. +struct PosixTimeZone { + std::string std_abbr; + std::int_fast32_t std_offset; + + std::string dst_abbr; + std::int_fast32_t dst_offset; + PosixTransition dst_start; + PosixTransition dst_end; +}; + +// Breaks down a POSIX time-zone specification into its constituent pieces, +// filling in any missing values (DST offset, or start/end transition times) +// with the standard-defined defaults. Returns false if the specification +// could not be parsed (although some fields of *res may have been altered). +bool ParsePosixSpec(const std::string& spec, PosixTimeZone* res); + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_POSIX_H_ diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/tzfile.h b/third_party/abseil-cpp/absl/time/internal/cctz/src/tzfile.h new file mode 100644 index 0000000000..1ed55e0f95 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/tzfile.h @@ -0,0 +1,122 @@ +/* Layout and location of TZif files. */ + +#ifndef TZFILE_H + +#define TZFILE_H + +/* +** This file is in the public domain, so clarified as of +** 1996-06-05 by Arthur David Olson. +*/ + +/* +** This header is for use ONLY with the time conversion code. +** There is no guarantee that it will remain unchanged, +** or that it will remain at all. +** Do NOT copy it to any system include directory. +** Thank you! +*/ + +/* +** Information about time zone files. +*/ + +#ifndef TZDIR +#define TZDIR "/usr/share/zoneinfo" /* Time zone object file directory */ +#endif /* !defined TZDIR */ + +#ifndef TZDEFAULT +#define TZDEFAULT "/etc/localtime" +#endif /* !defined TZDEFAULT */ + +#ifndef TZDEFRULES +#define TZDEFRULES "posixrules" +#endif /* !defined TZDEFRULES */ + +/* See Internet RFC 8536 for more details about the following format. */ + +/* +** Each file begins with. . . +*/ + +#define TZ_MAGIC "TZif" + +struct tzhead { + char tzh_magic[4]; /* TZ_MAGIC */ + char tzh_version[1]; /* '\0' or '2' or '3' as of 2013 */ + char tzh_reserved[15]; /* reserved; must be zero */ + char tzh_ttisutcnt[4]; /* coded number of trans. time flags */ + char tzh_ttisstdcnt[4]; /* coded number of trans. time flags */ + char tzh_leapcnt[4]; /* coded number of leap seconds */ + char tzh_timecnt[4]; /* coded number of transition times */ + char tzh_typecnt[4]; /* coded number of local time types */ + char tzh_charcnt[4]; /* coded number of abbr. chars */ +}; + +/* +** . . .followed by. . . +** +** tzh_timecnt (char [4])s coded transition times a la time(2) +** tzh_timecnt (unsigned char)s types of local time starting at above +** tzh_typecnt repetitions of +** one (char [4]) coded UT offset in seconds +** one (unsigned char) used to set tm_isdst +** one (unsigned char) that's an abbreviation list index +** tzh_charcnt (char)s '\0'-terminated zone abbreviations +** tzh_leapcnt repetitions of +** one (char [4]) coded leap second transition times +** one (char [4]) total correction after above +** tzh_ttisstdcnt (char)s indexed by type; if 1, transition +** time is standard time, if 0, +** transition time is local (wall clock) +** time; if absent, transition times are +** assumed to be local time +** tzh_ttisutcnt (char)s indexed by type; if 1, transition +** time is UT, if 0, transition time is +** local time; if absent, transition +** times are assumed to be local time. +** When this is 1, the corresponding +** std/wall indicator must also be 1. +*/ + +/* +** If tzh_version is '2' or greater, the above is followed by a second instance +** of tzhead and a second instance of the data in which each coded transition +** time uses 8 rather than 4 chars, +** then a POSIX-TZ-environment-variable-style std::string for use in handling +** instants after the last transition time stored in the file +** (with nothing between the newlines if there is no POSIX representation for +** such instants). +** +** If tz_version is '3' or greater, the above is extended as follows. +** First, the POSIX TZ std::string's hour offset may range from -167 +** through 167 as compared to the POSIX-required 0 through 24. +** Second, its DST start time may be January 1 at 00:00 and its stop +** time December 31 at 24:00 plus the difference between DST and +** standard time, indicating DST all year. +*/ + +/* +** In the current implementation, "tzset()" refuses to deal with files that +** exceed any of the limits below. +*/ + +#ifndef TZ_MAX_TIMES +#define TZ_MAX_TIMES 2000 +#endif /* !defined TZ_MAX_TIMES */ + +#ifndef TZ_MAX_TYPES +/* This must be at least 17 for Europe/Samara and Europe/Vilnius. */ +#define TZ_MAX_TYPES 256 /* Limited by what (unsigned char)'s can hold */ +#endif /* !defined TZ_MAX_TYPES */ + +#ifndef TZ_MAX_CHARS +#define TZ_MAX_CHARS 50 /* Maximum number of abbreviation characters */ + /* (limited by what unsigned chars can hold) */ +#endif /* !defined TZ_MAX_CHARS */ + +#ifndef TZ_MAX_LEAPS +#define TZ_MAX_LEAPS 50 /* Maximum number of leap second corrections */ +#endif /* !defined TZ_MAX_LEAPS */ + +#endif /* !defined TZFILE_H */ diff --git a/third_party/abseil-cpp/absl/time/internal/cctz/src/zone_info_source.cc b/third_party/abseil-cpp/absl/time/internal/cctz/src/zone_info_source.cc new file mode 100644 index 0000000000..98ea161267 --- /dev/null +++ b/third_party/abseil-cpp/absl/time/internal/cctz/src/zone_info_source.cc @@ -0,0 +1,115 @@ +// Copyright 2016 Google Inc. All Rights Reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "absl/time/internal/cctz/include/cctz/zone_info_source.h" + +#include "absl/base/config.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz { + +// Defined out-of-line to avoid emitting a weak vtable in all TUs. +ZoneInfoSource::~ZoneInfoSource() {} +std::string ZoneInfoSource::Version() const { return std::string(); } + +} // namespace cctz +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace time_internal { +namespace cctz_extension { + +namespace { + +// A default for cctz_extension::zone_info_source_factory, which simply +// defers to the fallback factory. +std::unique_ptr<absl::time_internal::cctz::ZoneInfoSource> DefaultFactory( + const std::string& name, + const std::function< + std::unique_ptr<absl::time_internal::cctz::ZoneInfoSource>( + const std::string& name)>& fallback_factory) { + return fallback_factory(name); +} + +} // namespace + +// A "weak" definition for cctz_extension::zone_info_source_factory. +// The user may override this with their own "strong" definition (see +// zone_info_source.h). +#if !defined(__has_attribute) +#define __has_attribute(x) 0 +#endif +// MinGW is GCC on Windows, so while it asserts __has_attribute(weak), the +// Windows linker cannot handle that. Nor does the MinGW compiler know how to +// pass "#pragma comment(linker, ...)" to the Windows linker. +#if (__has_attribute(weak) || defined(__GNUC__)) && !defined(__MINGW32__) +ZoneInfoSourceFactory zone_info_source_factory __attribute__((weak)) = + DefaultFactory; +#elif defined(_MSC_VER) && !defined(__MINGW32__) && !defined(_LIBCPP_VERSION) +extern ZoneInfoSourceFactory zone_info_source_factory; +extern ZoneInfoSourceFactory default_factory; +ZoneInfoSourceFactory default_factory = DefaultFactory; +#if defined(_M_IX86) +#pragma comment( \ + linker, \ + "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \ + "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \ + "@@ZA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \ + "@ABV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@@std@@@std@@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \ + "@@ZA") +#elif defined(_M_IA_64) || defined(_M_AMD64) || defined(_M_ARM64) +#pragma comment( \ + linker, \ + "/alternatename:?zone_info_source_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \ + "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \ + "@@ZEA=?default_factory@cctz_extension@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@3P6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \ + "@AEBV?$function@$$A6A?AV?$unique_ptr@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@U?$default_delete@VZoneInfoSource@cctz@time_internal@" ABSL_INTERNAL_MANGLED_NS \ + "@@@std@@@std@@AEBV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@@Z@" ABSL_INTERNAL_MANGLED_BACKREFERENCE \ + "@@ZEA") +#else +#error Unsupported MSVC platform +#endif // _M_<PLATFORM> +#else +// Make it a "strong" definition if we have no other choice. +ZoneInfoSourceFactory zone_info_source_factory = DefaultFactory; +#endif + +} // namespace cctz_extension +} // namespace time_internal +ABSL_NAMESPACE_END +} // namespace absl |