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https://github.com/ClickHouse/ClickHouse.git
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66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef CCTZ_TIME_ZONE_IMPL_H_
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#define CCTZ_TIME_ZONE_IMPL_H_
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#include <memory>
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#include <string>
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#include "time_zone.h"
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#include "time_zone_info.h"
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namespace cctz {
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// time_zone::Impl is the internal object referenced by a cctz::time_zone.
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class time_zone::Impl {
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public:
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// The UTC time zone. Also used for other time zones that fail to load.
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static time_zone UTC();
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// Load a named time zone. Returns false if the name is invalid, or if
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// some other kind of error occurs. Note that loading "UTC" never fails.
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static bool LoadTimeZone(const std::string& name, time_zone* tz);
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// Dereferences the time_zone to obtain its Impl.
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static const time_zone::Impl& get(const time_zone& tz);
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// The primary key is the time-zone ID (e.g., "America/New_York").
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const std::string& name() const { return name_; }
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// Breaks a time_point down to civil-time components in this time zone.
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time_zone::absolute_lookup BreakTime(
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const time_point<sys_seconds>& tp) const {
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return zone_->BreakTime(tp);
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}
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// Converts the civil-time components in this time zone into a time_point.
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// That is, the opposite of BreakTime(). The requested civil time may be
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// ambiguous or illegal due to a change of UTC offset.
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time_zone::civil_lookup MakeTime(const civil_second& cs) const {
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return zone_->MakeTime(cs);
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}
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private:
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explicit Impl(const std::string& name);
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static const Impl* UTCImpl();
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const std::string name_;
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std::unique_ptr<TimeZoneIf> zone_;
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};
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} // namespace cctz
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#endif // CCTZ_TIME_ZONE_IMPL_H_
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