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authorGravatar Abseil Team <absl-team@google.com>2018-10-15 11:30:24 -0700
committerGravatar Xiaoyi Zhang <zhangxy988@gmail.com>2018-10-15 15:32:46 -0400
commit5b70a8910b2e6fb0ce5193a41873139a126d2f7f (patch)
tree1a4a99b5c877f0b69bd8756ea1518dd16f09dd2b /absl/time/time.cc
parenta00bdd176d66ef0b417d9576052a19091fbdf891 (diff)
Export of internal Abseil changes.
-- f4e870453d02106c2685e0461816469a4704ad25 by Abseil Team <absl-team@google.com>: Expose TimeZone::NextTransition() and PrevTransition() now that we have absl::CivilSecond support in time.h. Note that these are for informational purposes only. General time code should not care when offset changes occur. PiperOrigin-RevId: 217177292 -- cfadd275c7333f7c27c4d682b9d167010d874e69 by Abseil Team <absl-team@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 217153577 -- 6ff5b8c61a1239b9c0478a7c62bcd2844b310307 by Jon Cohen <cohenjon@google.com>: Fix code examples in hash_testing.h. Includes random clang-format changes. PiperOrigin-RevId: 216898995 -- de124129d27f4627dabe193a10bf106a11783fba by Shaindel Schwartz <shaindel@google.com>: Add contribution guidelines describing how we decide whether to include an API in Abseil. PiperOrigin-RevId: 216886943 GitOrigin-RevId: f4e870453d02106c2685e0461816469a4704ad25 Change-Id: Ib9c6706f5bf931b71c0357bf1342053a3bee8ff7
Diffstat (limited to 'absl/time/time.cc')
-rw-r--r--absl/time/time.cc22
1 files changed, 22 insertions, 0 deletions
diff --git a/absl/time/time.cc b/absl/time/time.cc
index 0703856f..ac2c8a83 100644
--- a/absl/time/time.cc
+++ b/absl/time/time.cc
@@ -176,6 +176,20 @@ inline int MapWeekday(const cctz::weekday& wd) {
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
//
@@ -366,6 +380,14 @@ absl::TimeZone::TimeInfo TimeZone::At(CivilSecond ct) const {
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.
//