time_zone_libc.h (2089B)
1 // Copyright 2016 Google Inc. All Rights Reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_ 16 #define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_ 17 18 #include <memory> 19 #include <string> 20 21 #include "absl/base/config.h" 22 #include "absl/time/internal/cctz/src/time_zone_if.h" 23 24 namespace absl { 25 ABSL_NAMESPACE_BEGIN 26 namespace time_internal { 27 namespace cctz { 28 29 // A time zone backed by gmtime_r(3), localtime_r(3), and mktime(3), 30 // and which therefore only supports UTC and the local time zone. 31 class TimeZoneLibC : public TimeZoneIf { 32 public: 33 // Factory. 34 static std::unique_ptr<TimeZoneLibC> Make(const std::string& name); 35 36 // TimeZoneIf implementations. 37 time_zone::absolute_lookup BreakTime( 38 const time_point<seconds>& tp) const override; 39 time_zone::civil_lookup MakeTime(const civil_second& cs) const override; 40 bool NextTransition(const time_point<seconds>& tp, 41 time_zone::civil_transition* trans) const override; 42 bool PrevTransition(const time_point<seconds>& tp, 43 time_zone::civil_transition* trans) const override; 44 std::string Version() const override; 45 std::string Description() const override; 46 47 private: 48 explicit TimeZoneLibC(const std::string& name); 49 TimeZoneLibC(const TimeZoneLibC&) = delete; 50 TimeZoneLibC& operator=(const TimeZoneLibC&) = delete; 51 52 const bool local_; // localtime or UTC 53 }; 54 55 } // namespace cctz 56 } // namespace time_internal 57 ABSL_NAMESPACE_END 58 } // namespace absl 59 60 #endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_