1/*
2 *  Copyright (C) 2006, 2008, 2012 Apple Inc. All rights reserved.
3 *
4 *  This library is free software; you can redistribute it and/or
5 *  modify it under the terms of the GNU Library General Public
6 *  License as published by the Free Software Foundation; either
7 *  version 2 of the License, or (at your option) any later version.
8 *
9 *  This library is distributed in the hope that it will be useful,
10 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
11 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 *  Library General Public License for more details.
13 *
14 *  You should have received a copy of the GNU Library General Public License
15 *  along with this library; see the file COPYING.LIB.  If not, write to
16 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 *  Boston, MA 02110-1301, USA.
18 *
19 */
20
21#ifndef PropertyNameArray_h
22#define PropertyNameArray_h
23
24#include "CallFrame.h"
25#include "Identifier.h"
26#include <wtf/HashSet.h>
27#include <wtf/OwnArrayPtr.h>
28#include <wtf/Vector.h>
29
30namespace JSC {
31
32    class Structure;
33    class StructureChain;
34
35    // FIXME: Rename to PropertyNameArray.
36    class PropertyNameArrayData : public RefCounted<PropertyNameArrayData> {
37    public:
38        typedef Vector<Identifier, 20> PropertyNameVector;
39
40        static PassRefPtr<PropertyNameArrayData> create() { return adoptRef(new PropertyNameArrayData); }
41
42        PropertyNameVector& propertyNameVector() { return m_propertyNameVector; }
43
44    private:
45        PropertyNameArrayData()
46        {
47        }
48
49        PropertyNameVector m_propertyNameVector;
50    };
51
52    // FIXME: Rename to PropertyNameArrayBuilder.
53    class PropertyNameArray {
54    public:
55        PropertyNameArray(VM* vm)
56            : m_data(PropertyNameArrayData::create())
57            , m_vm(vm)
58            , m_numCacheableSlots(0)
59            , m_baseObject(0)
60        {
61        }
62
63        PropertyNameArray(ExecState* exec)
64            : m_data(PropertyNameArrayData::create())
65            , m_vm(&exec->vm())
66            , m_numCacheableSlots(0)
67            , m_baseObject(0)
68        {
69        }
70
71        VM* vm() { return m_vm; }
72
73        void add(const Identifier& identifier) { add(identifier.impl()); }
74        JS_EXPORT_PRIVATE void add(StringImpl*);
75        void addKnownUnique(StringImpl* identifier) { m_data->propertyNameVector().append(Identifier(m_vm, identifier)); }
76
77        Identifier& operator[](unsigned i) { return m_data->propertyNameVector()[i]; }
78        const Identifier& operator[](unsigned i) const { return m_data->propertyNameVector()[i]; }
79
80        void setData(PassRefPtr<PropertyNameArrayData> data) { m_data = data; }
81        PropertyNameArrayData* data() { return m_data.get(); }
82        PassRefPtr<PropertyNameArrayData> releaseData() { return m_data.release(); }
83
84        // FIXME: Remove these functions.
85        typedef PropertyNameArrayData::PropertyNameVector::const_iterator const_iterator;
86        size_t size() const { return m_data->propertyNameVector().size(); }
87        const_iterator begin() const { return m_data->propertyNameVector().begin(); }
88        const_iterator end() const { return m_data->propertyNameVector().end(); }
89
90        size_t numCacheableSlots() const { return m_numCacheableSlots; }
91        void setNumCacheableSlotsForObject(JSObject* object, size_t numCacheableSlots)
92        {
93            if (object != m_baseObject)
94                return;
95            m_numCacheableSlots = numCacheableSlots;
96        }
97        void setBaseObject(JSObject* object)
98        {
99            if (m_baseObject)
100                return;
101            m_baseObject = object;
102        }
103
104    private:
105        typedef HashSet<StringImpl*, PtrHash<StringImpl*> > IdentifierSet;
106
107        RefPtr<PropertyNameArrayData> m_data;
108        IdentifierSet m_set;
109        VM* m_vm;
110        size_t m_numCacheableSlots;
111        JSObject* m_baseObject;
112    };
113
114} // namespace JSC
115
116#endif // PropertyNameArray_h
117