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diff --git a/third_party/abseil_cpp/absl/time/time.cc b/third_party/abseil_cpp/absl/time/time.cc
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--- a/third_party/abseil_cpp/absl/time/time.cc
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@@ -1,500 +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