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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*
*/
#include "config.h"
#include "DateInstance.h"
#include "DateMath.h"
#include <math.h>
#include <wtf/MathExtras.h>
namespace JSC {
struct DateInstance::Cache {
double m_gregorianDateTimeCachedForMS;
GregorianDateTime m_cachedGregorianDateTime;
double m_gregorianDateTimeUTCCachedForMS;
GregorianDateTime m_cachedGregorianDateTimeUTC;
};
const ClassInfo DateInstance::info = {"Date", 0, 0, 0};
DateInstance::DateInstance(PassRefPtr<Structure> structure)
: JSWrapperObject(structure)
, m_cache(0)
{
}
DateInstance::~DateInstance()
{
delete m_cache;
}
void DateInstance::msToGregorianDateTime(double milli, bool outputIsUTC, GregorianDateTime& t) const
{
if (!m_cache) {
m_cache = new Cache;
m_cache->m_gregorianDateTimeCachedForMS = NaN;
m_cache->m_gregorianDateTimeUTCCachedForMS = NaN;
}
if (outputIsUTC) {
if (m_cache->m_gregorianDateTimeUTCCachedForMS != milli) {
JSC::msToGregorianDateTime(milli, true, m_cache->m_cachedGregorianDateTimeUTC);
m_cache->m_gregorianDateTimeUTCCachedForMS = milli;
}
t.copyFrom(m_cache->m_cachedGregorianDateTimeUTC);
} else {
if (m_cache->m_gregorianDateTimeCachedForMS != milli) {
JSC::msToGregorianDateTime(milli, false, m_cache->m_cachedGregorianDateTime);
m_cache->m_gregorianDateTimeCachedForMS = milli;
}
t.copyFrom(m_cache->m_cachedGregorianDateTime);
}
}
bool DateInstance::getTime(GregorianDateTime& t, int& offset) const
{
double milli = internalNumber();
if (isnan(milli))
return false;
msToGregorianDateTime(milli, false, t);
offset = gmtoffset(t);
return true;
}
bool DateInstance::getUTCTime(GregorianDateTime& t) const
{
double milli = internalNumber();
if (isnan(milli))
return false;
msToGregorianDateTime(milli, true, t);
return true;
}
bool DateInstance::getTime(double& milli, int& offset) const
{
milli = internalNumber();
if (isnan(milli))
return false;
GregorianDateTime t;
msToGregorianDateTime(milli, false, t);
offset = gmtoffset(t);
return true;
}
bool DateInstance::getUTCTime(double& milli) const
{
milli = internalNumber();
if (isnan(milli))
return false;
return true;
}
} // namespace JSC
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