1 /* 2 * Copyright (C) 1999-2000 Harri Porten (porten (at) 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 #ifndef DateMath_h 44 #define DateMath_h 45 46 #include <math.h> 47 #include <stdint.h> 48 #include <string.h> 49 #include <time.h> 50 #include "wtf/CurrentTime.h" 51 #include "wtf/Noncopyable.h" 52 #include "wtf/OwnArrayPtr.h" 53 #include "wtf/PassOwnArrayPtr.h" 54 #include "wtf/text/WTFString.h" 55 #include "wtf/UnusedParam.h" 56 #include "wtf/WTFExport.h" 57 58 namespace WTF { 59 60 WTF_EXPORT void initializeDates(); 61 WTF_EXPORT int equivalentYearForDST(int year); 62 63 // Not really math related, but this is currently the only shared place to put these. 64 WTF_EXPORT double parseES5DateFromNullTerminatedCharacters(const char* dateString); 65 WTF_EXPORT double parseDateFromNullTerminatedCharacters(const char* dateString); 66 WTF_EXPORT double parseDateFromNullTerminatedCharacters(const char* dateString, bool& haveTZ, int& offset); 67 WTF_EXPORT double timeClip(double); 68 // 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]. 69 WTF_EXPORT String makeRFC2822DateString(unsigned dayOfWeek, unsigned day, unsigned month, unsigned year, unsigned hours, unsigned minutes, unsigned seconds, int utcOffset); 70 71 inline double jsCurrentTime() 72 { 73 // JavaScript doesn't recognize fractions of a millisecond. 74 return floor(WTF::currentTimeMS()); 75 } 76 77 const char* const weekdayName[7] = { "Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun" }; 78 const char* const monthName[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; 79 const char* const monthFullName[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; 80 81 const double hoursPerDay = 24.0; 82 const double minutesPerHour = 60.0; 83 const double secondsPerHour = 60.0 * 60.0; 84 const double secondsPerMinute = 60.0; 85 const double msPerSecond = 1000.0; 86 const double msPerMinute = 60.0 * 1000.0; 87 const double msPerHour = 60.0 * 60.0 * 1000.0; 88 const double msPerDay = 24.0 * 60.0 * 60.0 * 1000.0; 89 const double msPerMonth = 2592000000.0; 90 91 bool isLeapYear(int year); 92 93 // Returns the number of days from 1970-01-01 to the specified date. 94 WTF_EXPORT double dateToDaysFrom1970(int year, int month, int day); 95 WTF_EXPORT int msToYear(double ms); 96 WTF_EXPORT double msToDays(double ms); 97 WTF_EXPORT int msToMinutes(double ms); 98 WTF_EXPORT int msToHours(double ms); 99 WTF_EXPORT int dayInYear(int year, int month, int day); 100 WTF_EXPORT int dayInYear(double ms, int year); 101 WTF_EXPORT int monthFromDayInYear(int dayInYear, bool leapYear); 102 WTF_EXPORT int dayInMonthFromDayInYear(int dayInYear, bool leapYear); 103 104 // Returns offset milliseconds for UTC and DST. 105 WTF_EXPORT int32_t calculateUTCOffset(); 106 WTF_EXPORT double calculateDSTOffset(double ms, double utcOffset); 107 108 } // namespace WTF 109 110 using WTF::isLeapYear; 111 using WTF::dateToDaysFrom1970; 112 using WTF::dayInMonthFromDayInYear; 113 using WTF::dayInYear; 114 using WTF::minutesPerHour; 115 using WTF::monthFromDayInYear; 116 using WTF::msPerDay; 117 using WTF::msPerHour; 118 using WTF::msPerMinute; 119 using WTF::msPerSecond; 120 using WTF::msToYear; 121 using WTF::msToDays; 122 using WTF::msToMinutes; 123 using WTF::msToHours; 124 using WTF::secondsPerMinute; 125 using WTF::parseDateFromNullTerminatedCharacters; 126 using WTF::makeRFC2822DateString; 127 using WTF::calculateUTCOffset; 128 using WTF::calculateDSTOffset; 129 130 #endif // DateMath_h 131
