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 <string> 19 20 #include "absl/base/config.h" 21 #include "time_zone_if.h" 22 23 namespace absl { 24 ABSL_NAMESPACE_BEGIN 25 namespace time_internal { 26 namespace cctz { 27 28 // A time zone backed by gmtime_r(3), localtime_r(3), and mktime(3), 29 // and which therefore only supports UTC and the local time zone. 30 // TODO: Add support for fixed offsets from UTC. 31 class TimeZoneLibC : public TimeZoneIf { 32 public: 33 explicit TimeZoneLibC(const std::string& name); 34 35 // TimeZoneIf implementations. 36 time_zone::absolute_lookup BreakTime( 37 const time_point<seconds>& tp) const override; 38 time_zone::civil_lookup MakeTime(const civil_second& cs) const override; 39 bool NextTransition(const time_point<seconds>& tp, 40 time_zone::civil_transition* trans) const override; 41 bool PrevTransition(const time_point<seconds>& tp, 42 time_zone::civil_transition* trans) const override; 43 std::string Version() const override; 44 std::string Description() const override; 45 46 private: 47 const bool local_; // localtime or UTC 48 }; 49 50 } // namespace cctz 51 } // namespace time_internal 52 ABSL_NAMESPACE_END 53 } // namespace absl 54 55 #endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_LIBC_H_ 56