1 | /* |
2 | * Copyright (C) 1999-2000 Harri Porten (porten@kde.org) |
3 | * Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. |
4 | * Copyright (C) 2007 Cameron Zwarich (cwzwarich@uwaterloo.ca) |
5 | * Copyright (C) 2007 Maks Orlovich |
6 | * |
7 | * This library is free software; you can redistribute it and/or |
8 | * modify it under the terms of the GNU Library General Public |
9 | * License as published by the Free Software Foundation; either |
10 | * version 2 of the License, or (at your option) any later version. |
11 | * |
12 | * This library is distributed in the hope that it will be useful, |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 | * Library General Public License for more details. |
16 | * |
17 | * You should have received a copy of the GNU Library General Public License |
18 | * along with this library; see the file COPYING.LIB. If not, write to |
19 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | * Boston, MA 02110-1301, USA. |
21 | * |
22 | */ |
23 | |
24 | #ifndef JSFunction_h |
25 | #define JSFunction_h |
26 | |
27 | #include "InternalFunction.h" |
28 | |
29 | namespace JSC { |
30 | |
31 | class ExecutableBase; |
32 | class FunctionExecutable; |
33 | class FunctionPrototype; |
34 | class JSActivation; |
35 | class JSGlobalObject; |
36 | |
37 | class JSFunction : public InternalFunction { |
38 | friend class JIT; |
39 | friend class JSGlobalData; |
40 | |
41 | typedef InternalFunction Base; |
42 | |
43 | public: |
44 | JSFunction(ExecState*, NonNullPassRefPtr<Structure>, int length, const Identifier&, NativeFunction); |
45 | JSFunction(ExecState*, NonNullPassRefPtr<FunctionExecutable>, ScopeChainNode*); |
46 | virtual ~JSFunction(); |
47 | |
48 | JSObject* construct(ExecState*, const ArgList&); |
49 | JSValue call(ExecState*, JSValue thisValue, const ArgList&); |
50 | |
51 | void setScope(const ScopeChain& scopeChain) { setScopeChain(scopeChain); } |
52 | ScopeChain& scope() { return scopeChain(); } |
53 | |
54 | ExecutableBase* executable() const { return m_executable.get(); } |
55 | |
56 | // To call either of these methods include Executable.h |
57 | inline bool isHostFunction() const; |
58 | FunctionExecutable* jsExecutable() const; |
59 | |
60 | static JS_EXPORTDATA const ClassInfo info; |
61 | |
62 | static PassRefPtr<Structure> createStructure(JSValue prototype) |
63 | { |
64 | return Structure::create(prototype, typeInfo: TypeInfo(ObjectType, StructureFlags)); |
65 | } |
66 | |
67 | NativeFunction nativeFunction() |
68 | { |
69 | return *WTF::bitwise_cast<NativeFunction*>(from: m_data); |
70 | } |
71 | |
72 | virtual ConstructType getConstructData(ConstructData&); |
73 | virtual CallType getCallData(CallData&); |
74 | |
75 | protected: |
76 | const static unsigned StructureFlags = OverridesGetOwnPropertySlot | ImplementsHasInstance | OverridesMarkChildren | OverridesGetPropertyNames | InternalFunction::StructureFlags; |
77 | |
78 | private: |
79 | JSFunction(NonNullPassRefPtr<Structure>); |
80 | |
81 | bool isHostFunctionNonInline() const; |
82 | |
83 | virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&); |
84 | virtual bool getOwnPropertyDescriptor(ExecState*, const Identifier&, PropertyDescriptor&); |
85 | virtual void getOwnPropertyNames(ExecState*, PropertyNameArray&, EnumerationMode mode = ExcludeDontEnumProperties); |
86 | virtual void put(ExecState*, const Identifier& propertyName, JSValue, PutPropertySlot&); |
87 | virtual bool deleteProperty(ExecState*, const Identifier& propertyName); |
88 | |
89 | virtual void markChildren(MarkStack&); |
90 | |
91 | virtual const ClassInfo* classInfo() const { return &info; } |
92 | |
93 | static JSValue argumentsGetter(ExecState*, const Identifier&, const PropertySlot&); |
94 | static JSValue callerGetter(ExecState*, const Identifier&, const PropertySlot&); |
95 | static JSValue lengthGetter(ExecState*, const Identifier&, const PropertySlot&); |
96 | |
97 | RefPtr<ExecutableBase> m_executable; |
98 | ScopeChain& scopeChain() |
99 | { |
100 | ASSERT(!isHostFunctionNonInline()); |
101 | return *WTF::bitwise_cast<ScopeChain*>(from: m_data); |
102 | } |
103 | void clearScopeChain() |
104 | { |
105 | ASSERT(!isHostFunctionNonInline()); |
106 | new (m_data) ScopeChain(NoScopeChain()); |
107 | } |
108 | void setScopeChain(ScopeChainNode* sc) |
109 | { |
110 | ASSERT(!isHostFunctionNonInline()); |
111 | new (m_data) ScopeChain(sc); |
112 | } |
113 | void setScopeChain(const ScopeChain& sc) |
114 | { |
115 | ASSERT(!isHostFunctionNonInline()); |
116 | *WTF::bitwise_cast<ScopeChain*>(from: m_data) = sc; |
117 | } |
118 | void setNativeFunction(NativeFunction func) |
119 | { |
120 | *WTF::bitwise_cast<NativeFunction*>(from: m_data) = func; |
121 | } |
122 | unsigned char m_data[sizeof(void*)]; |
123 | }; |
124 | |
125 | JSFunction* asFunction(JSValue); |
126 | |
127 | inline JSFunction* asFunction(JSValue value) |
128 | { |
129 | ASSERT(asObject(value)->inherits(&JSFunction::info)); |
130 | return static_cast<JSFunction*>(asObject(value)); |
131 | } |
132 | |
133 | } // namespace JSC |
134 | |
135 | #endif // JSFunction_h |
136 | |