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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
* Copyright (C) 2009 Google Inc. 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.
*
*/
#ifndef DateMath_h
#define DateMath_h
#include <math.h>
#include <string.h>
#include <time.h>
#include <wtf/CurrentTime.h>
#include <wtf/Noncopyable.h>
#include <wtf/UnusedParam.h>
namespace WTF {
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.
double parseDateFromNullTerminatedCharacters(const char* dateString);
double timeClip(double);
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 double hoursPerDay = 24.0;
const double minutesPerHour = 60.0;
const double secondsPerHour = 60.0 * 60.0;
const double secondsPerMinute = 60.0;
const double msPerSecond = 1000.0;
const double msPerMinute = 60.0 * 1000.0;
const double msPerHour = 60.0 * 60.0 * 1000.0;
const double msPerDay = 24.0 * 60.0 * 60.0 * 1000.0;
const double msPerMonth = 2592000000.0;
// Returns the number of days from 1970-01-01 to the specified date.
double dateToDaysFrom1970(int year, int month, int day);
int msToYear(double ms);
int dayInYear(double ms, int year);
int monthFromDayInYear(int dayInYear, bool leapYear);
int dayInMonthFromDayInYear(int dayInYear, bool leapYear);
// Returns combined offset in millisecond (UTC + DST).
LocalTimeOffset calculateLocalTimeOffset(double utcInMilliseconds);
} // namespace WTF
using WTF::dateToDaysFrom1970;
using WTF::dayInMonthFromDayInYear;
using WTF::dayInYear;
using WTF::minutesPerHour;
using WTF::monthFromDayInYear;
using WTF::msPerDay;
using WTF::msPerSecond;
using WTF::msToYear;
using WTF::secondsPerMinute;
using WTF::LocalTimeOffset;
using WTF::calculateLocalTimeOffset;
#if USE(JSC)
namespace JSC {
class ExecState;
struct GregorianDateTime;
void msToGregorianDateTime(ExecState*, double, bool outputIsUTC, GregorianDateTime&);
double gregorianDateTimeToMS(ExecState*, const GregorianDateTime&, double, bool inputIsUTC);
double getUTCOffset(ExecState*);
double parseDateFromNullTerminatedCharacters(ExecState*, const char* dateString);
// Intentionally overridding the default tm of the system.
// The members of tm differ on various operating systems.
struct GregorianDateTime : Noncopyable {
GregorianDateTime()
: second(0)
, minute(0)
, hour(0)
, weekDay(0)
, monthDay(0)
, yearDay(0)
, month(0)
, year(0)
, isDST(0)
, utcOffset(0)
, timeZone(0)
{
}
~GregorianDateTime()
{
delete [] timeZone;
}
operator tm() const
{
tm ret;
memset(&ret, 0, sizeof(ret));
ret.tm_sec = second;
ret.tm_min = minute;
ret.tm_hour = hour;
ret.tm_wday = weekDay;
ret.tm_mday = monthDay;
ret.tm_yday = yearDay;
ret.tm_mon = month;
ret.tm_year = year;
ret.tm_isdst = isDST;
#if HAVE(TM_GMTOFF)
ret.tm_gmtoff = static_cast<long>(utcOffset);
#endif
#if HAVE(TM_ZONE)
ret.tm_zone = timeZone;
#endif
return ret;
}
void copyFrom(const GregorianDateTime& rhs)
{
second = rhs.second;
minute = rhs.minute;
hour = rhs.hour;
weekDay = rhs.weekDay;
monthDay = rhs.monthDay;
yearDay = rhs.yearDay;
month = rhs.month;
year = rhs.year;
isDST = rhs.isDST;
utcOffset = rhs.utcOffset;
if (rhs.timeZone) {
int inZoneSize = strlen(rhs.timeZone) + 1;
timeZone = new char[inZoneSize];
strncpy(timeZone, rhs.timeZone, inZoneSize);
} else
timeZone = 0;
}
int second;
int minute;
int hour;
int weekDay;
int monthDay;
int yearDay;
int month;
int year;
int isDST;
int utcOffset;
char* timeZone;
};
static inline int gmtoffset(const GregorianDateTime& t)
{
return t.utcOffset;
}
} // namespace JSC
#endif // USE(JSC)
#endif // DateMath_h
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