1 /*
2 * Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
3 * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
4 *
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.
9 *
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.
14 *
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
18 *
19 */
20
21 #include "config.h"
22 #include "FunctionConstructor.h"
23
24 #include "Debugger.h"
25 #include "FunctionPrototype.h"
26 #include "JSFunction.h"
27 #include "JSGlobalObject.h"
28 #include "JSString.h"
29 #include "Lexer.h"
30 #include "Nodes.h"
31 #include "Parser.h"
32 #include "StringBuilder.h"
33
34 namespace JSC {
35
36 ASSERT_CLASS_FITS_IN_CELL(FunctionConstructor);
37
FunctionConstructor(ExecState * exec,NonNullPassRefPtr<Structure> structure,FunctionPrototype * functionPrototype)38 FunctionConstructor::FunctionConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, FunctionPrototype* functionPrototype)
39 : InternalFunction(&exec->globalData(), structure, Identifier(exec, functionPrototype->classInfo()->className))
40 {
41 putDirectWithoutTransition(exec->propertyNames().prototype, functionPrototype, DontEnum | DontDelete | ReadOnly);
42
43 // Number of arguments for constructor
44 putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontDelete | DontEnum);
45 }
46
constructWithFunctionConstructor(ExecState * exec,JSObject *,const ArgList & args)47 static JSObject* constructWithFunctionConstructor(ExecState* exec, JSObject*, const ArgList& args)
48 {
49 return constructFunction(exec, args);
50 }
51
getConstructData(ConstructData & constructData)52 ConstructType FunctionConstructor::getConstructData(ConstructData& constructData)
53 {
54 constructData.native.function = constructWithFunctionConstructor;
55 return ConstructTypeHost;
56 }
57
callFunctionConstructor(ExecState * exec,JSObject *,JSValue,const ArgList & args)58 static JSValue JSC_HOST_CALL callFunctionConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args)
59 {
60 return constructFunction(exec, args);
61 }
62
63 // ECMA 15.3.1 The Function Constructor Called as a Function
getCallData(CallData & callData)64 CallType FunctionConstructor::getCallData(CallData& callData)
65 {
66 callData.native.function = callFunctionConstructor;
67 return CallTypeHost;
68 }
69
70 // ECMA 15.3.2 The Function Constructor
constructFunction(ExecState * exec,const ArgList & args,const Identifier & functionName,const UString & sourceURL,int lineNumber)71 JSObject* constructFunction(ExecState* exec, const ArgList& args, const Identifier& functionName, const UString& sourceURL, int lineNumber)
72 {
73 // Functions need to have a space following the opening { due to for web compatibility
74 // see https://bugs.webkit.org/show_bug.cgi?id=24350
75 // We also need \n before the closing } to handle // comments at the end of the last line
76 UString program;
77 if (args.isEmpty())
78 program = "(function() { \n})";
79 else if (args.size() == 1)
80 program = makeString("(function() { ", args.at(0).toString(exec), "\n})");
81 else {
82 StringBuilder builder;
83 builder.append("(function(");
84 builder.append(args.at(0).toString(exec));
85 for (size_t i = 1; i < args.size() - 1; i++) {
86 builder.append(",");
87 builder.append(args.at(i).toString(exec));
88 }
89 builder.append(") { ");
90 builder.append(args.at(args.size() - 1).toString(exec));
91 builder.append("\n})");
92 program = builder.build();
93 }
94
95 int errLine;
96 UString errMsg;
97 SourceCode source = makeSource(program, sourceURL, lineNumber);
98 RefPtr<FunctionExecutable> function = FunctionExecutable::fromGlobalCode(functionName, exec, exec->dynamicGlobalObject()->debugger(), source, &errLine, &errMsg);
99 if (!function)
100 return throwError(exec, SyntaxError, errMsg, errLine, source.provider()->asID(), source.provider()->url());
101
102 JSGlobalObject* globalObject = exec->lexicalGlobalObject();
103 ScopeChain scopeChain(globalObject, globalObject->globalData(), globalObject, exec->globalThisValue());
104 return new (exec) JSFunction(exec, function, scopeChain.node());
105 }
106
107 // ECMA 15.3.2 The Function Constructor
constructFunction(ExecState * exec,const ArgList & args)108 JSObject* constructFunction(ExecState* exec, const ArgList& args)
109 {
110 return constructFunction(exec, args, Identifier(exec, "anonymous"), UString(), 1);
111 }
112
113 } // namespace JSC
114