1 /* 2 * Copyright (C) 1999-2001 Harri Porten (porten (at) 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 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 47 static JSObject* constructWithFunctionConstructor(ExecState* exec, JSObject*, const ArgList& args) 48 { 49 return constructFunction(exec, args); 50 } 51 52 ConstructType FunctionConstructor::getConstructData(ConstructData& constructData) 53 { 54 constructData.native.function = constructWithFunctionConstructor; 55 return ConstructTypeHost; 56 } 57 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 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 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 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