8707772407528f8dc193c9388d74ab324a121a1f
[WebKit-https.git] / Source / JavaScriptCore / runtime / DateInstance.h
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
26 namespace 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