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Diffstat (limited to 'third_party/abseil_cpp/absl/time/time.cc')
| -rw-r--r-- | third_party/abseil_cpp/absl/time/time.cc | 499 |
1 files changed, 0 insertions, 499 deletions
diff --git a/third_party/abseil_cpp/absl/time/time.cc b/third_party/abseil_cpp/absl/time/time.cc deleted file mode 100644 index 6bb36cb3e7..0000000000 --- a/third_party/abseil_cpp/absl/time/time.cc +++ /dev/null @@ -1,499 +0,0 @@ -// Copyright 2017 The Abseil Authors. -// -// 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. - -// The implementation of the absl::Time class, which is declared in -// //absl/time.h. -// -// The representation for an absl::Time is an absl::Duration offset from the -// epoch. We use the traditional Unix epoch (1970-01-01 00:00:00 +0000) -// for convenience, but this is not exposed in the API and could be changed. -// -// NOTE: To keep type verbosity to a minimum, the following variable naming -// conventions are used throughout this file. -// -// tz: An absl::TimeZone -// ci: An absl::TimeZone::CivilInfo -// ti: An absl::TimeZone::TimeInfo -// cd: An absl::CivilDay or a cctz::civil_day -// cs: An absl::CivilSecond or a cctz::civil_second -// bd: An absl::Time::Breakdown -// cl: A cctz::time_zone::civil_lookup -// al: A cctz::time_zone::absolute_lookup - -#include "absl/time/time.h" - -#if defined(_MSC_VER) -#include <winsock2.h> // for timeval -#endif - -#include <cstring> -#include <ctime> -#include <limits> - -#include "absl/time/internal/cctz/include/cctz/civil_time.h" -#include "absl/time/internal/cctz/include/cctz/time_zone.h" - -namespace cctz = absl::time_internal::cctz; - -namespace absl { -ABSL_NAMESPACE_BEGIN - -namespace { - -inline cctz::time_point<cctz::seconds> unix_epoch() { - return std::chrono::time_point_cast<cctz::seconds>( - std::chrono::system_clock::from_time_t(0)); -} - -// Floors d to the next unit boundary closer to negative infinity. -inline int64_t FloorToUnit(absl::Duration d, absl::Duration unit) { - absl::Duration rem; - int64_t q = absl::IDivDuration(d, unit, &rem); - return (q > 0 || - rem >= ZeroDuration() || - q == std::numeric_limits<int64_t>::min()) ? q : q - 1; -} - -inline absl::Time::Breakdown InfiniteFutureBreakdown() { - absl::Time::Breakdown bd; - bd.year = std::numeric_limits<int64_t>::max(); - bd.month = 12; - bd.day = 31; - bd.hour = 23; - bd.minute = 59; - bd.second = 59; - bd.subsecond = absl::InfiniteDuration(); - bd.weekday = 4; - bd.yearday = 365; - bd.offset = 0; - bd.is_dst = false; - bd.zone_abbr = "-00"; - return bd; -} - -inline absl::Time::Breakdown InfinitePastBreakdown() { - Time::Breakdown bd; - bd.year = std::numeric_limits<int64_t>::min(); - bd.month = 1; - bd.day = 1; - bd.hour = 0; - bd.minute = 0; - bd.second = 0; - bd.subsecond = -absl::InfiniteDuration(); - bd.weekday = 7; - bd.yearday = 1; - bd.offset = 0; - bd.is_dst = false; - bd.zone_abbr = "-00"; - return bd; -} - -inline absl::TimeZone::CivilInfo InfiniteFutureCivilInfo() { - TimeZone::CivilInfo ci; - ci.cs = CivilSecond::max(); - ci.subsecond = InfiniteDuration(); - ci.offset = 0; - ci.is_dst = false; - ci.zone_abbr = "-00"; - return ci; -} - -inline absl::TimeZone::CivilInfo InfinitePastCivilInfo() { - TimeZone::CivilInfo ci; - ci.cs = CivilSecond::min(); - ci.subsecond = -InfiniteDuration(); - ci.offset = 0; - ci.is_dst = false; - ci.zone_abbr = "-00"; - return ci; -} - -inline absl::TimeConversion InfiniteFutureTimeConversion() { - absl::TimeConversion tc; - tc.pre = tc.trans = tc.post = absl::InfiniteFuture(); - tc.kind = absl::TimeConversion::UNIQUE; - tc.normalized = true; - return tc; -} - -inline TimeConversion InfinitePastTimeConversion() { - absl::TimeConversion tc; - tc.pre = tc.trans = tc.post = absl::InfinitePast(); - tc.kind = absl::TimeConversion::UNIQUE; - tc.normalized = true; - return tc; -} - -// Makes a Time from sec, overflowing to InfiniteFuture/InfinitePast as -// necessary. If sec is min/max, then consult cs+tz to check for overlow. -Time MakeTimeWithOverflow(const cctz::time_point<cctz::seconds>& sec, - const cctz::civil_second& cs, - const cctz::time_zone& tz, - bool* normalized = nullptr) { - const auto max = cctz::time_point<cctz::seconds>::max(); - const auto min = cctz::time_point<cctz::seconds>::min(); - if (sec == max) { - const auto al = tz.lookup(max); - if (cs > al.cs) { - if (normalized) *normalized = true; - return absl::InfiniteFuture(); - } - } - if (sec == min) { - const auto al = tz.lookup(min); - if (cs < al.cs) { - if (normalized) *normalized = true; - return absl::InfinitePast(); - } - } - const auto hi = (sec - unix_epoch()).count(); - return time_internal::FromUnixDuration(time_internal::MakeDuration(hi)); -} - -// Returns Mon=1..Sun=7. -inline int MapWeekday(const cctz::weekday& wd) { - switch (wd) { - case cctz::weekday::monday: - return 1; - case cctz::weekday::tuesday: - return 2; - case cctz::weekday::wednesday: - return 3; - case cctz::weekday::thursday: - return 4; - case cctz::weekday::friday: - return 5; - case cctz::weekday::saturday: - return 6; - case cctz::weekday::sunday: - return 7; - } - return 1; -} - -bool FindTransition(const cctz::time_zone& tz, - bool (cctz::time_zone::*find_transition)( - const cctz::time_point<cctz::seconds>& tp, - cctz::time_zone::civil_transition* trans) const, - Time t, TimeZone::CivilTransition* trans) { - // Transitions are second-aligned, so we can discard any fractional part. - const auto tp = unix_epoch() + cctz::seconds(ToUnixSeconds(t)); - cctz::time_zone::civil_transition tr; - if (!(tz.*find_transition)(tp, &tr)) return false; - trans->from = CivilSecond(tr.from); - trans->to = CivilSecond(tr.to); - return true; -} - -} // namespace - -// -// Time -// - -absl::Time::Breakdown Time::In(absl::TimeZone tz) const { - if (*this == absl::InfiniteFuture()) return InfiniteFutureBreakdown(); - if (*this == absl::InfinitePast()) return InfinitePastBreakdown(); - - const auto tp = unix_epoch() + cctz::seconds(time_internal::GetRepHi(rep_)); - const auto al = cctz::time_zone(tz).lookup(tp); - const auto cs = al.cs; - const auto cd = cctz::civil_day(cs); - - absl::Time::Breakdown bd; - bd.year = cs.year(); - bd.month = cs.month(); - bd.day = cs.day(); - bd.hour = cs.hour(); - bd.minute = cs.minute(); - bd.second = cs.second(); - bd.subsecond = time_internal::MakeDuration(0, time_internal::GetRepLo(rep_)); - bd.weekday = MapWeekday(cctz::get_weekday(cd)); - bd.yearday = cctz::get_yearday(cd); - bd.offset = al.offset; - bd.is_dst = al.is_dst; - bd.zone_abbr = al.abbr; - return bd; -} - -// -// Conversions from/to other time types. -// - -absl::Time FromUDate(double udate) { - return time_internal::FromUnixDuration(absl::Milliseconds(udate)); -} - -absl::Time FromUniversal(int64_t universal) { - return absl::UniversalEpoch() + 100 * absl::Nanoseconds(universal); -} - -int64_t ToUnixNanos(Time t) { - if (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >= 0 && - time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >> 33 == 0) { - return (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) * - 1000 * 1000 * 1000) + - (time_internal::GetRepLo(time_internal::ToUnixDuration(t)) / 4); - } - return FloorToUnit(time_internal::ToUnixDuration(t), absl::Nanoseconds(1)); -} - -int64_t ToUnixMicros(Time t) { - if (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >= 0 && - time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >> 43 == 0) { - return (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) * - 1000 * 1000) + - (time_internal::GetRepLo(time_internal::ToUnixDuration(t)) / 4000); - } - return FloorToUnit(time_internal::ToUnixDuration(t), absl::Microseconds(1)); -} - -int64_t ToUnixMillis(Time t) { - if (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >= 0 && - time_internal::GetRepHi(time_internal::ToUnixDuration(t)) >> 53 == 0) { - return (time_internal::GetRepHi(time_internal::ToUnixDuration(t)) * 1000) + - (time_internal::GetRepLo(time_internal::ToUnixDuration(t)) / - (4000 * 1000)); - } - return FloorToUnit(time_internal::ToUnixDuration(t), absl::Milliseconds(1)); -} - -int64_t ToUnixSeconds(Time t) { - return time_internal::GetRepHi(time_internal::ToUnixDuration(t)); -} - -time_t ToTimeT(Time t) { return absl::ToTimespec(t).tv_sec; } - -double ToUDate(Time t) { - return absl::FDivDuration(time_internal::ToUnixDuration(t), - absl::Milliseconds(1)); -} - -int64_t ToUniversal(absl::Time t) { - return absl::FloorToUnit(t - absl::UniversalEpoch(), absl::Nanoseconds(100)); -} - -absl::Time TimeFromTimespec(timespec ts) { - return time_internal::FromUnixDuration(absl::DurationFromTimespec(ts)); -} - -absl::Time TimeFromTimeval(timeval tv) { - return time_internal::FromUnixDuration(absl::DurationFromTimeval(tv)); -} - -timespec ToTimespec(Time t) { - timespec ts; - absl::Duration d = time_internal::ToUnixDuration(t); - if (!time_internal::IsInfiniteDuration(d)) { - ts.tv_sec = time_internal::GetRepHi(d); - if (ts.tv_sec == time_internal::GetRepHi(d)) { // no time_t narrowing - ts.tv_nsec = time_internal::GetRepLo(d) / 4; // floor - return ts; - } - } - if (d >= absl::ZeroDuration()) { - ts.tv_sec = std::numeric_limits<time_t>::max(); - ts.tv_nsec = 1000 * 1000 * 1000 - 1; - } else { - ts.tv_sec = std::numeric_limits<time_t>::min(); - ts.tv_nsec = 0; - } - return ts; -} - -timeval ToTimeval(Time t) { - timeval tv; - timespec ts = absl::ToTimespec(t); - tv.tv_sec = ts.tv_sec; - if (tv.tv_sec != ts.tv_sec) { // narrowing - if (ts.tv_sec < 0) { - tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::min(); - tv.tv_usec = 0; - } else { - tv.tv_sec = std::numeric_limits<decltype(tv.tv_sec)>::max(); - tv.tv_usec = 1000 * 1000 - 1; - } - return tv; - } - tv.tv_usec = static_cast<int>(ts.tv_nsec / 1000); // suseconds_t - return tv; -} - -Time FromChrono(const std::chrono::system_clock::time_point& tp) { - return time_internal::FromUnixDuration(time_internal::FromChrono( - tp - std::chrono::system_clock::from_time_t(0))); -} - -std::chrono::system_clock::time_point ToChronoTime(absl::Time t) { - using D = std::chrono::system_clock::duration; - auto d = time_internal::ToUnixDuration(t); - if (d < ZeroDuration()) d = Floor(d, FromChrono(D{1})); - return std::chrono::system_clock::from_time_t(0) + - time_internal::ToChronoDuration<D>(d); -} - -// -// TimeZone -// - -absl::TimeZone::CivilInfo TimeZone::At(Time t) const { - if (t == absl::InfiniteFuture()) return InfiniteFutureCivilInfo(); - if (t == absl::InfinitePast()) return InfinitePastCivilInfo(); - - const auto ud = time_internal::ToUnixDuration(t); - const auto tp = unix_epoch() + cctz::seconds(time_internal::GetRepHi(ud)); - const auto al = cz_.lookup(tp); - - TimeZone::CivilInfo ci; - ci.cs = CivilSecond(al.cs); - ci.subsecond = time_internal::MakeDuration(0, time_internal::GetRepLo(ud)); - ci.offset = al.offset; - ci.is_dst = al.is_dst; - ci.zone_abbr = al.abbr; - return ci; -} - -absl::TimeZone::TimeInfo TimeZone::At(CivilSecond ct) const { - const cctz::civil_second cs(ct); - const auto cl = cz_.lookup(cs); - - TimeZone::TimeInfo ti; - switch (cl.kind) { - case cctz::time_zone::civil_lookup::UNIQUE: - ti.kind = TimeZone::TimeInfo::UNIQUE; - break; - case cctz::time_zone::civil_lookup::SKIPPED: - ti.kind = TimeZone::TimeInfo::SKIPPED; - break; - case cctz::time_zone::civil_lookup::REPEATED: - ti.kind = TimeZone::TimeInfo::REPEATED; - break; - } - ti.pre = MakeTimeWithOverflow(cl.pre, cs, cz_); - ti.trans = MakeTimeWithOverflow(cl.trans, cs, cz_); - ti.post = MakeTimeWithOverflow(cl.post, cs, cz_); - return ti; -} - -bool TimeZone::NextTransition(Time t, CivilTransition* trans) const { - return FindTransition(cz_, &cctz::time_zone::next_transition, t, trans); -} - -bool TimeZone::PrevTransition(Time t, CivilTransition* trans) const { - return FindTransition(cz_, &cctz::time_zone::prev_transition, t, trans); -} - -// -// Conversions involving time zones. -// - -absl::TimeConversion ConvertDateTime(int64_t year, int mon, int day, int hour, - int min, int sec, TimeZone tz) { - // Avoids years that are too extreme for CivilSecond to normalize. - if (year > 300000000000) return InfiniteFutureTimeConversion(); - if (year < -300000000000) return InfinitePastTimeConversion(); - - const CivilSecond cs(year, mon, day, hour, min, sec); - const auto ti = tz.At(cs); - - TimeConversion tc; - tc.pre = ti.pre; - tc.trans = ti.trans; - tc.post = ti.post; - switch (ti.kind) { - case TimeZone::TimeInfo::UNIQUE: - tc.kind = TimeConversion::UNIQUE; - break; - case TimeZone::TimeInfo::SKIPPED: - tc.kind = TimeConversion::SKIPPED; - break; - case TimeZone::TimeInfo::REPEATED: - tc.kind = TimeConversion::REPEATED; - break; - } - tc.normalized = false; - if (year != cs.year() || mon != cs.month() || day != cs.day() || - hour != cs.hour() || min != cs.minute() || sec != cs.second()) { - tc.normalized = true; - } - return tc; -} - -absl::Time FromTM(const struct tm& tm, absl::TimeZone tz) { - civil_year_t tm_year = tm.tm_year; - // Avoids years that are too extreme for CivilSecond to normalize. - if (tm_year > 300000000000ll) return InfiniteFuture(); - if (tm_year < -300000000000ll) return InfinitePast(); - int tm_mon = tm.tm_mon; - if (tm_mon == std::numeric_limits<int>::max()) { - tm_mon -= 12; - tm_year += 1; - } - const auto ti = tz.At(CivilSecond(tm_year + 1900, tm_mon + 1, tm.tm_mday, - tm.tm_hour, tm.tm_min, tm.tm_sec)); - return tm.tm_isdst == 0 ? ti.post : ti.pre; -} - -struct tm ToTM(absl::Time t, absl::TimeZone tz) { - struct tm tm = {}; - - const auto ci = tz.At(t); - const auto& cs = ci.cs; - tm.tm_sec = cs.second(); - tm.tm_min = cs.minute(); - tm.tm_hour = cs.hour(); - tm.tm_mday = cs.day(); - tm.tm_mon = cs.month() - 1; - - // Saturates tm.tm_year in cases of over/underflow, accounting for the fact - // that tm.tm_year is years since 1900. - if (cs.year() < std::numeric_limits<int>::min() + 1900) { - tm.tm_year = std::numeric_limits<int>::min(); - } else if (cs.year() > std::numeric_limits<int>::max()) { - tm.tm_year = std::numeric_limits<int>::max() - 1900; - } else { - tm.tm_year = static_cast<int>(cs.year() - 1900); - } - - switch (GetWeekday(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 = GetYearDay(cs) - 1; - tm.tm_isdst = ci.is_dst ? 1 : 0; - - return tm; -} - -ABSL_NAMESPACE_END -} // namespace absl |