1 | /* |
2 | * Copyright (C) 2008, 2009 Apple Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
14 | * its contributors may be used to endorse or promote products derived |
15 | * from this software without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #ifndef JSPropertyNameIterator_h |
30 | #define JSPropertyNameIterator_h |
31 | |
32 | #include "JSObject.h" |
33 | #include "JSString.h" |
34 | #include "Operations.h" |
35 | #include "PropertyNameArray.h" |
36 | #include "StructureChain.h" |
37 | |
38 | namespace JSC { |
39 | |
40 | class Identifier; |
41 | class JSObject; |
42 | |
43 | class JSPropertyNameIterator : public JSCell { |
44 | friend class JIT; |
45 | |
46 | public: |
47 | static JSPropertyNameIterator* create(ExecState*, JSObject*); |
48 | |
49 | static PassRefPtr<Structure> createStructure(JSValue prototype) |
50 | { |
51 | return Structure::create(prototype, typeInfo: TypeInfo(CompoundType, OverridesMarkChildren)); |
52 | } |
53 | |
54 | virtual bool isPropertyNameIterator() const { return true; } |
55 | |
56 | virtual void markChildren(MarkStack&); |
57 | |
58 | bool getOffset(size_t i, int& offset) |
59 | { |
60 | if (i >= m_numCacheableSlots) |
61 | return false; |
62 | offset = i; |
63 | return true; |
64 | } |
65 | |
66 | JSValue get(ExecState*, JSObject*, size_t i); |
67 | size_t size() { return m_jsStringsSize; } |
68 | |
69 | void setCachedStructure(Structure* structure) { m_cachedStructure = structure; } |
70 | Structure* cachedStructure() { return m_cachedStructure; } |
71 | |
72 | void setCachedPrototypeChain(NonNullPassRefPtr<StructureChain> cachedPrototypeChain) { m_cachedPrototypeChain = cachedPrototypeChain; } |
73 | StructureChain* cachedPrototypeChain() { return m_cachedPrototypeChain.get(); } |
74 | |
75 | private: |
76 | JSPropertyNameIterator(ExecState*, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlot); |
77 | |
78 | Structure* m_cachedStructure; |
79 | RefPtr<StructureChain> m_cachedPrototypeChain; |
80 | uint32_t m_numCacheableSlots; |
81 | uint32_t m_jsStringsSize; |
82 | OwnArrayPtr<JSValue> m_jsStrings; |
83 | }; |
84 | |
85 | inline JSPropertyNameIterator::JSPropertyNameIterator(ExecState* exec, PropertyNameArrayData* propertyNameArrayData, size_t numCacheableSlots) |
86 | : JSCell(exec->globalData().propertyNameIteratorStructure.get()) |
87 | , m_cachedStructure(0) |
88 | , m_numCacheableSlots(numCacheableSlots) |
89 | , m_jsStringsSize(propertyNameArrayData->propertyNameVector().size()) |
90 | , m_jsStrings(new JSValue[m_jsStringsSize]) |
91 | { |
92 | PropertyNameArrayData::PropertyNameVector& propertyNameVector = propertyNameArrayData->propertyNameVector(); |
93 | for (size_t i = 0; i < m_jsStringsSize; ++i) |
94 | m_jsStrings[i] = jsOwnedString(exec, s: propertyNameVector[i].ustring()); |
95 | } |
96 | |
97 | inline void Structure::setEnumerationCache(JSPropertyNameIterator* enumerationCache) |
98 | { |
99 | ASSERT(!isDictionary()); |
100 | m_enumerationCache = enumerationCache; |
101 | } |
102 | |
103 | } // namespace JSC |
104 | |
105 | #endif // JSPropertyNameIterator_h |
106 | |