// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_BASE_TIMEZONE_CACHE_H_
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#define V8_BASE_TIMEZONE_CACHE_H_
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namespace v8 {
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namespace base {
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class TimezoneCache {
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public:
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// Short name of the local timezone (e.g., EST)
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virtual const char* LocalTimezone(double time_ms) = 0;
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// ES #sec-daylight-saving-time-adjustment
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// Daylight Saving Time Adjustment
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virtual double DaylightSavingsOffset(double time_ms) = 0;
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// ES #sec-local-time-zone-adjustment
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// Local Time Zone Adjustment
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//
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// https://github.com/tc39/ecma262/pull/778
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virtual double LocalTimeOffset(double time_ms, bool is_utc) = 0;
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// Called when the local timezone changes
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virtual void Clear() = 0;
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// Called when tearing down the isolate
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virtual ~TimezoneCache() {}
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};
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} // namespace base
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} // namespace v8
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#endif // V8_BASE_TIMEZONE_CACHE_H_
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