| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 DateMath_h |
| #define DateMath_h |
| |
| #include <math.h> |
| #include <stdint.h> |
| #include <string.h> |
| #include <time.h> |
| #include <wtf/CurrentTime.h> |
| #include <wtf/Noncopyable.h> |
| #include <wtf/text/WTFString.h> |
| |
| namespace WTF { |
| |
| enum TimeType { |
| UTCTime = 0, |
| LocalTime |
| }; |
| |
| struct LocalTimeOffset { |
| LocalTimeOffset() |
| : isDST(false) |
| , offset(0) |
| { |
| } |
| |
| LocalTimeOffset(bool isDST, int offset) |
| : isDST(isDST) |
| , offset(offset) |
| { |
| } |
| |
| bool operator==(const LocalTimeOffset& other) |
| { |
| return isDST == other.isDST && offset == other.offset; |
| } |
| |
| bool operator!=(const LocalTimeOffset& other) |
| { |
| return isDST != other.isDST || offset != other.offset; |
| } |
| |
| bool isDST; |
| int offset; |
| }; |
| |
| void initializeDates(); |
| int equivalentYearForDST(int year); |
| |
| // Not really math related, but this is currently the only shared place to put these. |
| WTF_EXPORT_PRIVATE double parseES5DateFromNullTerminatedCharacters(const char* dateString); |
| WTF_EXPORT_PRIVATE double parseDateFromNullTerminatedCharacters(const char* dateString); |
| WTF_EXPORT_PRIVATE double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveTZ, int& offset); |
| WTF_EXPORT_PRIVATE double timeClip(double); |
| // dayOfWeek: [0, 6] 0 being Monday, day: [1, 31], month: [0, 11], year: ex: 2011, hours: [0, 23], minutes: [0, 59], seconds: [0, 59], utcOffset: [-720,720]. |
| String makeRFC2822DateString(unsigned dayOfWeek, unsigned day, unsigned month, unsigned year, unsigned hours, unsigned minutes, unsigned seconds, int utcOffset); |
| |
| inline double jsCurrentTime() |
| { |
| // JavaScript doesn't recognize fractions of a millisecond. |
| return floor(WTF::currentTimeMS()); |
| } |
| |
| const char* const weekdayName[7] = { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" }; |
| const char* const monthName[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; |
| const char* const monthFullName[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; |
| |
| const double hoursPerDay = 24.0; |
| const double minutesPerHour = 60.0; |
| const double secondsPerMinute = 60.0; |
| const double msPerSecond = 1000.0; |
| const double msPerMonth = 2592000000.0; |
| const double secondsPerHour = secondsPerMinute * minutesPerHour; |
| const double secondsPerDay = secondsPerHour * hoursPerDay; |
| const double msPerMinute = msPerSecond * secondsPerMinute; |
| const double msPerHour = msPerSecond * secondsPerHour; |
| const double msPerDay = msPerSecond * secondsPerDay; |
| |
| WTF_EXPORT_PRIVATE bool isLeapYear(int year); |
| |
| // Returns the number of days from 1970-01-01 to the specified date. |
| WTF_EXPORT_PRIVATE double dateToDaysFrom1970(int year, int month, int day); |
| WTF_EXPORT_PRIVATE int msToYear(double ms); |
| WTF_EXPORT_PRIVATE double msToDays(double ms); |
| WTF_EXPORT_PRIVATE int msToMinutes(double ms); |
| WTF_EXPORT_PRIVATE int msToHours(double ms); |
| WTF_EXPORT_PRIVATE int dayInYear(int year, int month, int day); |
| WTF_EXPORT_PRIVATE int dayInYear(double ms, int year); |
| WTF_EXPORT_PRIVATE int monthFromDayInYear(int dayInYear, bool leapYear); |
| WTF_EXPORT_PRIVATE int dayInMonthFromDayInYear(int dayInYear, bool leapYear); |
| |
| // Returns combined offset in millisecond (UTC + DST). |
| WTF_EXPORT_PRIVATE LocalTimeOffset calculateLocalTimeOffset(double utcInMilliseconds, TimeType = UTCTime); |
| |
| } // namespace WTF |
| |
| using WTF::isLeapYear; |
| using WTF::dateToDaysFrom1970; |
| using WTF::dayInMonthFromDayInYear; |
| using WTF::dayInYear; |
| using WTF::minutesPerHour; |
| using WTF::monthFromDayInYear; |
| using WTF::msPerDay; |
| using WTF::msPerHour; |
| using WTF::msPerMinute; |
| using WTF::msPerSecond; |
| using WTF::msToYear; |
| using WTF::msToDays; |
| using WTF::msToMinutes; |
| using WTF::msToHours; |
| using WTF::secondsPerDay; |
| using WTF::secondsPerMinute; |
| using WTF::parseDateFromNullTerminatedCharacters; |
| using WTF::makeRFC2822DateString; |
| using WTF::LocalTimeOffset; |
| using WTF::calculateLocalTimeOffset; |
| |
| #endif // DateMath_h |