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
29namespace 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

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/runtime/JSFunction.h