1/*
2 *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 *  Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
4 *
5 *  This library is free software; you can redistribute it and/or
6 *  modify it under the terms of the GNU Lesser General Public
7 *  License as published by the Free Software Foundation; either
8 *  version 2 of the License, or (at your option) any later version.
9 *
10 *  This library is distributed in the hope that it will be useful,
11 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 *  Lesser General Public License for more details.
14 *
15 *  You should have received a copy of the GNU Lesser General Public
16 *  License along with this library; if not, write to the Free Software
17 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
18 *  USA
19 *
20 */
21
22#include "config.h"
23#include "DateInstance.h"
24
25#include "JSDateMath.h"
26#include "JSGlobalObject.h"
27#include "JSCInlines.h"
28#include <math.h>
29#include <wtf/MathExtras.h>
30
31using namespace WTF;
32
33namespace JSC {
34
35const ClassInfo DateInstance::s_info = {"Date", &JSWrapperObject::s_info, 0, 0, CREATE_METHOD_TABLE(DateInstance)};
36
37DateInstance::DateInstance(VM& vm, Structure* structure)
38    : JSWrapperObject(vm, structure)
39{
40}
41
42void DateInstance::finishCreation(VM& vm)
43{
44    Base::finishCreation(vm);
45    ASSERT(inherits(info()));
46    setInternalValue(vm, jsNaN());
47}
48
49void DateInstance::finishCreation(VM& vm, double time)
50{
51    Base::finishCreation(vm);
52    ASSERT(inherits(info()));
53    setInternalValue(vm, jsNumber(timeClip(time)));
54}
55
56void DateInstance::destroy(JSCell* cell)
57{
58    static_cast<DateInstance*>(cell)->DateInstance::~DateInstance();
59}
60
61const GregorianDateTime* DateInstance::calculateGregorianDateTime(ExecState* exec) const
62{
63    double milli = internalNumber();
64    if (std::isnan(milli))
65        return 0;
66
67    VM& vm = exec->vm();
68    if (!m_data)
69        m_data = vm.dateInstanceCache.add(milli);
70
71    if (m_data->m_gregorianDateTimeCachedForMS != milli) {
72        msToGregorianDateTime(vm, milli, false, m_data->m_cachedGregorianDateTime);
73        m_data->m_gregorianDateTimeCachedForMS = milli;
74    }
75    return &m_data->m_cachedGregorianDateTime;
76}
77
78const GregorianDateTime* DateInstance::calculateGregorianDateTimeUTC(ExecState* exec) const
79{
80    double milli = internalNumber();
81    if (std::isnan(milli))
82        return 0;
83
84    VM& vm = exec->vm();
85    if (!m_data)
86        m_data = vm.dateInstanceCache.add(milli);
87
88    if (m_data->m_gregorianDateTimeUTCCachedForMS != milli) {
89        msToGregorianDateTime(vm, milli, true, m_data->m_cachedGregorianDateTimeUTC);
90        m_data->m_gregorianDateTimeUTCCachedForMS = milli;
91    }
92    return &m_data->m_cachedGregorianDateTimeUTC;
93}
94
95} // namespace JSC
96