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