bf86cfe165
-- 20b3acaff75d05315f272747956b01405adccafb by Greg Falcon <gfalcon@google.com>: Re-import of CCTZ from GitHub, with new ABSL_NAMESPACE_ transform applied. PiperOrigin-RevId: 285564474 -- 4d9e3fcabcea33c8b0b69f094ad2eddc0fa19557 by Derek Mauro <dmauro@google.com>: Moves the disabling of a warning to before the function begins. MSVC apparently requires this for warnings in the range 4700-4999. https://docs.microsoft.com/en-us/cpp/preprocessor/warning?redirectedfrom=MSDN&view=vs-2019 PiperOrigin-RevId: 285516232 -- 4a060cbeda76e89693c50276ae5b62cbf0fff39a by Derek Mauro <dmauro@google.com>: MSVC: Fixes uniform_real_distribution_test in opt mode Disables a constant arithmetic overflow warning in a test that tests the behavior on overflow. This should be tested because a user might have this warning disabled. PiperOrigin-RevId: 285452242 -- 548ab2f4cbe59bd6f6bf493af4f9ea765c4fa949 by Andy Soffer <asoffer@google.com>: Release absl::bind_front, a C++11-compliant work-alike type for the C++20 std::bind_front. PiperOrigin-RevId: 285247872 GitOrigin-RevId: 20b3acaff75d05315f272747956b01405adccafb Change-Id: I00fe45939246cba9bfc7be375d67787d2eb57cd3
76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
// Copyright 2016 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
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#define ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
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#include <chrono>
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#include <cstdint>
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#include <memory>
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#include <string>
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#include "absl/base/config.h"
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#include "absl/time/internal/cctz/include/cctz/civil_time.h"
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#include "absl/time/internal/cctz/include/cctz/time_zone.h"
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namespace absl {
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ABSL_NAMESPACE_BEGIN
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namespace time_internal {
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namespace cctz {
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// A simple interface used to hide time-zone complexities from time_zone::Impl.
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// Subclasses implement the functions for civil-time conversions in the zone.
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class TimeZoneIf {
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public:
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// A factory function for TimeZoneIf implementations.
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static std::unique_ptr<TimeZoneIf> Load(const std::string& name);
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virtual ~TimeZoneIf();
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virtual time_zone::absolute_lookup BreakTime(
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const time_point<seconds>& tp) const = 0;
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virtual time_zone::civil_lookup MakeTime(const civil_second& cs) const = 0;
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virtual bool NextTransition(const time_point<seconds>& tp,
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time_zone::civil_transition* trans) const = 0;
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virtual bool PrevTransition(const time_point<seconds>& tp,
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time_zone::civil_transition* trans) const = 0;
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virtual std::string Version() const = 0;
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virtual std::string Description() const = 0;
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protected:
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TimeZoneIf() {}
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};
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// Convert between time_point<seconds> and a count of seconds since the
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// Unix epoch. We assume that the std::chrono::system_clock and the
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// Unix clock are second aligned, but not that they share an epoch.
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inline std::int_fast64_t ToUnixSeconds(const time_point<seconds>& tp) {
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return (tp - std::chrono::time_point_cast<seconds>(
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std::chrono::system_clock::from_time_t(0)))
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.count();
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}
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inline time_point<seconds> FromUnixSeconds(std::int_fast64_t t) {
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return std::chrono::time_point_cast<seconds>(
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std::chrono::system_clock::from_time_t(0)) +
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seconds(t);
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}
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} // namespace cctz
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} // namespace time_internal
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ABSL_NAMESPACE_END
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} // namespace absl
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#endif // ABSL_TIME_INTERNAL_CCTZ_TIME_ZONE_IF_H_
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