1/*
2 *  Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 *  Copyright (C) 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  USA
18 *
19 */
20
21#ifndef DateInstance_h
22#define DateInstance_h
23
24#include "JSWrapperObject.h"
25
26namespace WTF {
27    struct GregorianDateTime;
28}
29
30namespace JSC {
31
32    class DateInstance : public JSWrapperObject {
33    public:
34        DateInstance(ExecState*, Structure*, double);
35        explicit DateInstance(ExecState*, Structure*);
36
37        double internalNumber() const { return internalValue().uncheckedGetNumber(); }
38
39        static JS_EXPORTDATA const ClassInfo s_info;
40
41        const GregorianDateTime* gregorianDateTime(ExecState* exec) const
42        {
43            if (m_data && m_data->m_gregorianDateTimeCachedForMS == internalNumber())
44                return &m_data->m_cachedGregorianDateTime;
45            return calculateGregorianDateTime(exec);
46        }
47
48        const GregorianDateTime* gregorianDateTimeUTC(ExecState* exec) const
49        {
50            if (m_data && m_data->m_gregorianDateTimeUTCCachedForMS == internalNumber())
51                return &m_data->m_cachedGregorianDateTimeUTC;
52            return calculateGregorianDateTimeUTC(exec);
53        }
54
55        static Structure* createStructure(JSGlobalData& globalData, JSValue prototype)
56        {
57            return Structure::create(globalData, prototype, TypeInfo(ObjectType, StructureFlags), AnonymousSlotCount, &s_info);
58        }
59
60    private:
61        const GregorianDateTime* calculateGregorianDateTime(ExecState*) const;
62        const GregorianDateTime* calculateGregorianDateTimeUTC(ExecState*) const;
63
64        mutable RefPtr<DateInstanceData> m_data;
65    };
66
67    DateInstance* asDateInstance(JSValue);
68
69    inline DateInstance* asDateInstance(JSValue value)
70    {
71        ASSERT(asObject(value)->inherits(&DateInstance::s_info));
72        return static_cast<DateInstance*>(asObject(value));
73    }
74
75} // namespace JSC
76
77#endif // DateInstance_h
78