/* * Copyright (C) 1999-2000 Harri Porten (porten@kde.org) * Copyright (C) 2006-2020 Apple Inc. All rights reserved. * Copyright (C) 2009 Google Inc. All rights reserved. * Copyright (C) 2010 Research In Motion Limited. All rights reserved. * * Version: MPL 1.1/GPL 2.0/LGPL 2.1 * * The contents of this file are subject to the Mozilla Public License Version * 1.1 (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.mozilla.org/MPL/ * * Software distributed under the License is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License * for the specific language governing rights and limitations under the * License. * * The Original Code is Mozilla Communicator client code, released * March 31, 1998. * * The Initial Developer of the Original Code is * Netscape Communications Corporation. * Portions created by the Initial Developer are Copyright (C) 1998 * the Initial Developer. All Rights Reserved. * * Contributor(s): * * Alternatively, the contents of this file may be used under the terms of * either of the GNU General Public License Version 2 or later (the "GPL"), * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), * in which case the provisions of the GPL or the LGPL are applicable instead * of those above. If you wish to allow use of your version of this file only * under the terms of either the GPL or the LGPL, and not to allow others to * use your version of this file under the terms of the MPL, indicate your * decision by deleting the provisions above and replace them with the notice * and other provisions required by the GPL or the LGPL. If you do not delete * the provisions above, a recipient may use your version of this file under * the terms of any one of the MPL, the GPL or the LGPL. * */ #pragma once #include "DateInstanceCache.h" #include <wtf/DateMath.h> #include <wtf/GregorianDateTime.h> namespace JSC { class JSGlobalObject; class OpaqueICUTimeZone; class VM; // We do not expose icu::TimeZone in this header file. And we cannot use icu::TimeZone forward declaration // because icu namespace can be an alias to icu$verNum namespace. struct OpaqueICUTimeZoneDeleter { JS_EXPORT_PRIVATE void operator()(OpaqueICUTimeZone*); }; struct LocalTimeOffsetCache { LocalTimeOffsetCache() = default; LocalTimeOffset offset; double start { 0.0 }; double end { -1.0 }; double incrementStart { 0.0 }; double incrementEnd { 0.0 }; }; class DateCache { WTF_MAKE_FAST_ALLOCATED; WTF_MAKE_NONCOPYABLE(DateCache); public: DateCache(); ~DateCache(); JS_EXPORT_PRIVATE void reset(); String defaultTimeZone(); Ref<DateInstanceData> cachedDateInstanceData(double millisecondsFromEpoch); void msToGregorianDateTime(double millisecondsFromEpoch, WTF::TimeType outputTimeType, GregorianDateTime&); double gregorianDateTimeToMS(const GregorianDateTime&, double milliseconds, WTF::TimeType inputTimeType); double parseDate(JSGlobalObject*, VM&, const WTF::String&); private: void timeZoneCacheSlow(); LocalTimeOffset localTimeOffset(double millisecondsFromEpoch, WTF::TimeType inputTimeType = WTF::UTCTime); LocalTimeOffset calculateLocalTimeOffset(double millisecondsFromEpoch, WTF::TimeType inputTimeType); OpaqueICUTimeZone* timeZoneCache() { if (!m_timeZoneCache) timeZoneCacheSlow(); return m_timeZoneCache.get(); } std::unique_ptr<OpaqueICUTimeZone, OpaqueICUTimeZoneDeleter> m_timeZoneCache; LocalTimeOffsetCache m_utcTimeOffsetCache; LocalTimeOffsetCache m_localTimeOffsetCache; String m_cachedDateString; double m_cachedDateStringValue; DateInstanceCache m_dateInstanceCache; }; ALWAYS_INLINE bool isUTCEquivalent(StringView timeZone) { return timeZone == "Etc/UTC"_s || timeZone == "Etc/GMT"_s; } } // namespace JSC