2 * Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
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.
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.
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
22 #include "FunctionConstructor.h"
25 #include "ExceptionHelpers.h"
26 #include "FunctionPrototype.h"
27 #include "JSFunction.h"
28 #include "JSGlobalObject.h"
33 #include "UStringBuilder.h"
34 #include "UStringConcatenate.h"
38 ASSERT_CLASS_FITS_IN_CELL(FunctionConstructor);
40 FunctionConstructor::FunctionConstructor(JSGlobalObject* globalObject, Structure* structure)
41 : InternalFunction(globalObject, structure)
45 void FunctionConstructor::finishCreation(ExecState* exec, FunctionPrototype* functionPrototype)
47 Base::finishCreation(exec->globalData(), Identifier(exec, functionPrototype->classInfo()->className));
48 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().prototype, functionPrototype, DontEnum | DontDelete | ReadOnly);
50 // Number of arguments for constructor
51 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().length, jsNumber(1), ReadOnly | DontDelete | DontEnum);
54 static EncodedJSValue JSC_HOST_CALL constructWithFunctionConstructor(ExecState* exec)
57 return JSValue::encode(constructFunction(exec, asInternalFunction(exec->callee())->globalObject(), args));
60 ConstructType FunctionConstructor::getConstructData(ConstructData& constructData)
62 constructData.native.function = constructWithFunctionConstructor;
63 return ConstructTypeHost;
66 static EncodedJSValue JSC_HOST_CALL callFunctionConstructor(ExecState* exec)
69 return JSValue::encode(constructFunction(exec, asInternalFunction(exec->callee())->globalObject(), args));
72 // ECMA 15.3.1 The Function Constructor Called as a Function
73 CallType FunctionConstructor::getCallData(CallData& callData)
75 callData.native.function = callFunctionConstructor;
79 // ECMA 15.3.2 The Function Constructor
80 JSObject* constructFunction(ExecState* exec, JSGlobalObject* globalObject, const ArgList& args, const Identifier& functionName, const UString& sourceURL, int lineNumber)
82 if (!globalObject->evalEnabled())
83 return throwError(exec, createEvalError(exec, "Function constructor is disabled"));
84 return constructFunctionSkippingEvalEnabledCheck(exec, globalObject, args, functionName, sourceURL, lineNumber);
87 JSObject* constructFunctionSkippingEvalEnabledCheck(ExecState* exec, JSGlobalObject* globalObject, const ArgList& args, const Identifier& functionName, const UString& sourceURL, int lineNumber)
89 // Functions need to have a space following the opening { due to for web compatibility
90 // see https://bugs.webkit.org/show_bug.cgi?id=24350
91 // We also need \n before the closing } to handle // comments at the end of the last line
94 program = "(function() { \n})";
95 else if (args.size() == 1)
96 program = makeUString("(function() { ", args.at(0).toString(exec), "\n})");
98 UStringBuilder builder;
99 builder.append("(function(");
100 builder.append(args.at(0).toString(exec));
101 for (size_t i = 1; i < args.size() - 1; i++) {
103 builder.append(args.at(i).toString(exec));
105 builder.append(") { ");
106 builder.append(args.at(args.size() - 1).toString(exec));
107 builder.append("\n})");
108 program = builder.toUString();
111 JSGlobalData& globalData = globalObject->globalData();
112 SourceCode source = makeSource(program, sourceURL, lineNumber);
113 JSObject* exception = 0;
114 FunctionExecutable* function = FunctionExecutable::fromGlobalCode(functionName, exec, exec->dynamicGlobalObject()->debugger(), source, &exception);
117 return throwError(exec, exception);
120 ScopeChainNode* scopeChain = ScopeChainNode::create(exec, 0, globalObject, &globalData, globalObject, exec->globalThisValue());
121 return JSFunction::create(exec, function, scopeChain);
124 // ECMA 15.3.2 The Function Constructor
125 JSObject* constructFunction(ExecState* exec, JSGlobalObject* globalObject, const ArgList& args)
127 return constructFunction(exec, globalObject, args, Identifier(exec, "anonymous"), UString(), 1);