af7882601a
- 9136c06dfa8dbfdde0a427ad3509e34763d607a6 Fix string_view_test and str_cat_test build under MSVC de... by Derek Mauro <dmauro@google.com> - a463820f9441888f4368aa87328599e3209f9b07 Removes constexpr optional<T>::operator->(). This was don... by Abseil Team <absl-team@google.com> - 3bf78a7f126daafff329f7815d507422f1ca378d Remove dependencies on external CCTZ project. by Shaindel Schwartz <shaindel@google.com> - a4ae574a11b1ddf6e88459af3d638cf79aea7ecd Internal change by Jon Cohen <cohenjon@google.com> GitOrigin-RevId: fd5f3d7077270ffc5ea74cdb9e18bbae3b9b46aa Change-Id: I6ab8ab99863716fe9b2745a12ef285f7a6da6d1e
70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
// Copyright 2016 Google Inc. All Rights Reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
|
|
#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
|
|
|
|
#include <chrono>
|
|
#include <cstdint>
|
|
#include <memory>
|
|
#include <string>
|
|
|
|
#include "absl/time/internal/cctz/include/cctz/civil_time.h"
|
|
#include "absl/time/internal/cctz/include/cctz/time_zone.h"
|
|
|
|
namespace absl {
|
|
namespace time_internal {
|
|
namespace cctz {
|
|
|
|
// A simple interface used to hide time-zone complexities from time_zone::Impl.
|
|
// Subclasses implement the functions for civil-time conversions in the zone.
|
|
class TimeZoneIf {
|
|
public:
|
|
// A factory function for TimeZoneIf implementations.
|
|
static std::unique_ptr<TimeZoneIf> Load(const std::string& name);
|
|
|
|
virtual ~TimeZoneIf();
|
|
|
|
virtual time_zone::absolute_lookup BreakTime(
|
|
const time_point<sys_seconds>& tp) const = 0;
|
|
virtual time_zone::civil_lookup MakeTime(
|
|
const civil_second& cs) const = 0;
|
|
|
|
virtual std::string Description() const = 0;
|
|
virtual bool NextTransition(time_point<sys_seconds>* tp) const = 0;
|
|
virtual bool PrevTransition(time_point<sys_seconds>* tp) const = 0;
|
|
|
|
protected:
|
|
TimeZoneIf() {}
|
|
};
|
|
|
|
// Convert between time_point<sys_seconds> and a count of seconds since
|
|
// the Unix epoch. We assume that the std::chrono::system_clock and the
|
|
// Unix clock are second aligned, but not that they share an epoch.
|
|
inline std::int_fast64_t ToUnixSeconds(const time_point<sys_seconds>& tp) {
|
|
return (tp - std::chrono::time_point_cast<sys_seconds>(
|
|
std::chrono::system_clock::from_time_t(0)))
|
|
.count();
|
|
}
|
|
inline time_point<sys_seconds> FromUnixSeconds(std::int_fast64_t t) {
|
|
return std::chrono::time_point_cast<sys_seconds>(
|
|
std::chrono::system_clock::from_time_t(0)) +
|
|
sys_seconds(t);
|
|
}
|
|
|
|
} // namespace cctz
|
|
} // namespace time_internal
|
|
} // namespace absl
|
|
|
|
#endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
|