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 JSC {
27
28    class DateInstance : public JSWrapperObject {
29    protected:
30        JS_EXPORT_PRIVATE DateInstance(ExecState*, Structure*);
31        void finishCreation(VM&);
32        JS_EXPORT_PRIVATE void finishCreation(VM&, double);
33
34        static void destroy(JSCell*);
35
36    public:
37        typedef JSWrapperObject Base;
38
39        static DateInstance* create(ExecState* exec, Structure* structure, double date)
40        {
41            DateInstance* instance = new (NotNull, allocateCell<DateInstance>(*exec->heap())) DateInstance(exec, structure);
42            instance->finishCreation(exec->vm(), date);
43            return instance;
44        }
45
46        static DateInstance* create(ExecState* exec, Structure* structure)
47        {
48            DateInstance* instance = new (NotNull, allocateCell<DateInstance>(*exec->heap())) DateInstance(exec, structure);
49            instance->finishCreation(exec->vm());
50            return instance;
51        }
52
53        double internalNumber() const { return internalValue().asNumber(); }
54
55        static JS_EXPORTDATA const ClassInfo s_info;
56
57        const GregorianDateTime* gregorianDateTime(ExecState* exec) const
58        {
59            if (m_data && m_data->m_gregorianDateTimeCachedForMS == internalNumber())
60                return &m_data->m_cachedGregorianDateTime;
61            return calculateGregorianDateTime(exec);
62        }
63
64        const GregorianDateTime* gregorianDateTimeUTC(ExecState* exec) const
65        {
66            if (m_data && m_data->m_gregorianDateTimeUTCCachedForMS == internalNumber())
67                return &m_data->m_cachedGregorianDateTimeUTC;
68            return calculateGregorianDateTimeUTC(exec);
69        }
70
71        static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
72        {
73            return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), &s_info);
74        }
75
76    private:
77        const GregorianDateTime* calculateGregorianDateTime(ExecState*) const;
78        const GregorianDateTime* calculateGregorianDateTimeUTC(ExecState*) const;
79
80        mutable RefPtr<DateInstanceData> m_data;
81    };
82
83    DateInstance* asDateInstance(JSValue);
84
85    inline DateInstance* asDateInstance(JSValue value)
86    {
87        ASSERT(asObject(value)->inherits(&DateInstance::s_info));
88        return static_cast<DateInstance*>(asObject(value));
89    }
90
91} // namespace JSC
92
93#endif // DateInstance_h
94