1/*
2 * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
4 * Copyright (C) 2009 Google Inc. All rights reserved.
5 * Copyright (C) 2010 Research In Motion Limited. All rights reserved.
6 *
7 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
8 *
9 * The contents of this file are subject to the Mozilla Public License Version
10 * 1.1 (the "License"); you may not use this file except in compliance with
11 * the License. You may obtain a copy of the License at
12 * http://www.mozilla.org/MPL/
13 *
14 * Software distributed under the License is distributed on an "AS IS" basis,
15 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
16 * for the specific language governing rights and limitations under the
17 * License.
18 *
19 * The Original Code is Mozilla Communicator client code, released
20 * March 31, 1998.
21 *
22 * The Initial Developer of the Original Code is
23 * Netscape Communications Corporation.
24 * Portions created by the Initial Developer are Copyright (C) 1998
25 * the Initial Developer. All Rights Reserved.
26 *
27 * Contributor(s):
28 *
29 * Alternatively, the contents of this file may be used under the terms of
30 * either of the GNU General Public License Version 2 or later (the "GPL"),
31 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
32 * in which case the provisions of the GPL or the LGPL are applicable instead
33 * of those above. If you wish to allow use of your version of this file only
34 * under the terms of either the GPL or the LGPL, and not to allow others to
35 * use your version of this file under the terms of the MPL, indicate your
36 * decision by deleting the provisions above and replace them with the notice
37 * and other provisions required by the GPL or the LGPL. If you do not delete
38 * the provisions above, a recipient may use your version of this file under
39 * the terms of any one of the MPL, the GPL or the LGPL.
40 *
41 */
42
43#pragma once
44
45#include <math.h>
46#include <stdint.h>
47#include <string.h>
48#include <time.h>
49#include <wtf/WallTime.h>
50#include <wtf/text/WTFString.h>
51
52namespace WTF {
53
54enum TimeType {
55 UTCTime = 0,
56 LocalTime
57};
58
59struct LocalTimeOffset {
60 LocalTimeOffset()
61 : isDST(false)
62 , offset(0)
63 {
64 }
65
66 LocalTimeOffset(bool isDST, int offset)
67 : isDST(isDST)
68 , offset(offset)
69 {
70 }
71
72 bool operator==(const LocalTimeOffset& other)
73 {
74 return isDST == other.isDST && offset == other.offset;
75 }
76
77 bool operator!=(const LocalTimeOffset& other)
78 {
79 return isDST != other.isDST || offset != other.offset;
80 }
81
82 bool isDST;
83 int offset;
84};
85
86void initializeDates();
87int equivalentYearForDST(int year);
88
89// Not really math related, but this is currently the only shared place to put these.
90WTF_EXPORT_PRIVATE double parseES5DateFromNullTerminatedCharacters(const char* dateString);
91WTF_EXPORT_PRIVATE double parseDateFromNullTerminatedCharacters(const char* dateString);
92WTF_EXPORT_PRIVATE double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveTZ, int& offset);
93WTF_EXPORT_PRIVATE double timeClip(double);
94// 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].
95String makeRFC2822DateString(unsigned dayOfWeek, unsigned day, unsigned month, unsigned year, unsigned hours, unsigned minutes, unsigned seconds, int utcOffset);
96
97inline double jsCurrentTime()
98{
99 // JavaScript doesn't recognize fractions of a millisecond.
100 return floor(WallTime::now().secondsSinceEpoch().milliseconds());
101}
102
103const char* const weekdayName[7] = { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" };
104const char* const monthName[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
105const char* const monthFullName[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
106
107const double hoursPerDay = 24.0;
108const double minutesPerHour = 60.0;
109const double secondsPerMinute = 60.0;
110const double msPerSecond = 1000.0;
111const double msPerMonth = 2592000000.0;
112const double secondsPerHour = secondsPerMinute * minutesPerHour;
113const double secondsPerDay = secondsPerHour * hoursPerDay;
114const double msPerMinute = msPerSecond * secondsPerMinute;
115const double msPerHour = msPerSecond * secondsPerHour;
116const double msPerDay = msPerSecond * secondsPerDay;
117
118WTF_EXPORT_PRIVATE bool isLeapYear(int year);
119
120// Returns the number of days from 1970-01-01 to the specified date.
121WTF_EXPORT_PRIVATE double dateToDaysFrom1970(int year, int month, int day);
122WTF_EXPORT_PRIVATE int msToYear(double ms);
123WTF_EXPORT_PRIVATE double msToDays(double ms);
124WTF_EXPORT_PRIVATE int msToMinutes(double ms);
125WTF_EXPORT_PRIVATE int msToHours(double ms);
126WTF_EXPORT_PRIVATE int dayInYear(int year, int month, int day);
127WTF_EXPORT_PRIVATE int dayInYear(double ms, int year);
128WTF_EXPORT_PRIVATE int monthFromDayInYear(int dayInYear, bool leapYear);
129WTF_EXPORT_PRIVATE int dayInMonthFromDayInYear(int dayInYear, bool leapYear);
130
131// Returns combined offset in millisecond (UTC + DST).
132WTF_EXPORT_PRIVATE LocalTimeOffset calculateLocalTimeOffset(double utcInMilliseconds, TimeType = UTCTime);
133
134} // namespace WTF
135
136using WTF::isLeapYear;
137using WTF::dateToDaysFrom1970;
138using WTF::dayInMonthFromDayInYear;
139using WTF::dayInYear;
140using WTF::minutesPerHour;
141using WTF::monthFromDayInYear;
142using WTF::msPerDay;
143using WTF::msPerHour;
144using WTF::msPerMinute;
145using WTF::msPerSecond;
146using WTF::msToYear;
147using WTF::msToDays;
148using WTF::msToMinutes;
149using WTF::msToHours;
150using WTF::secondsPerDay;
151using WTF::secondsPerMinute;
152using WTF::parseDateFromNullTerminatedCharacters;
153using WTF::makeRFC2822DateString;
154using WTF::LocalTimeOffset;
155using WTF::calculateLocalTimeOffset;
156