chromium/third_party/abseil-cpp/absl/time/internal/cctz/src/time_zone_if.h

// 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
//
//   https://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/base/config.h"
#include "absl/time/internal/cctz/include/cctz/civil_time.h"
#include "absl/time/internal/cctz/include/cctz/time_zone.h"

namespace absl {
ABSL_NAMESPACE_BEGIN
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 { … };

// Convert between time_point<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, and that the results are representable.
// (That is, that they share an epoch, which is required since C++20.)
inline std::int_fast64_t ToUnixSeconds(const time_point<seconds>& tp) { … }
inline time_point<seconds> FromUnixSeconds(std::int_fast64_t t) { … }

}  // namespace cctz
}  // namespace time_internal
ABSL_NAMESPACE_END
}  // namespace absl

#endif  // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_