1 /* 2 * Copyright (C) 1999-2000 Harri Porten (porten (at) kde.org) 3 * Copyright (C) 2003, 2007, 2008 Apple Inc. All rights reserved. 4 * Copyright (C) 2003 Peter Kelly (pmk (at) post.com) 5 * Copyright (C) 2006 Alexey Proskuryakov (ap (at) nypop.com) 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser 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 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 20 * USA 21 * 22 */ 23 24 #include "config.h" 25 #include "ArrayConstructor.h" 26 27 #include "ArrayPrototype.h" 28 #include "Error.h" 29 #include "JSArray.h" 30 #include "JSFunction.h" 31 #include "Lookup.h" 32 #include "PrototypeFunction.h" 33 34 namespace JSC { 35 36 ASSERT_CLASS_FITS_IN_CELL(ArrayConstructor); 37 38 static JSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState*, JSObject*, JSValue, const ArgList&); 39 40 ArrayConstructor::ArrayConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, ArrayPrototype* arrayPrototype, Structure* prototypeFunctionStructure) 41 : InternalFunction(&exec->globalData(), structure, Identifier(exec, arrayPrototype->classInfo()->className)) 42 { 43 // ECMA 15.4.3.1 Array.prototype 44 putDirectWithoutTransition(exec->propertyNames().prototype, arrayPrototype, DontEnum | DontDelete | ReadOnly); 45 46 // no. of arguments for constructor 47 putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete); 48 49 // ES5 50 putDirectFunctionWithoutTransition(exec, new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().isArray, arrayConstructorIsArray), DontEnum); 51 } 52 53 static inline JSObject* constructArrayWithSizeQuirk(ExecState* exec, const ArgList& args) 54 { 55 // a single numeric argument denotes the array size (!) 56 if (args.size() == 1 && args.at(0).isNumber()) { 57 uint32_t n = args.at(0).toUInt32(exec); 58 if (n != args.at(0).toNumber(exec)) 59 return throwError(exec, RangeError, "Array size is not a small enough positive integer."); 60 return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), n); 61 } 62 63 // otherwise the array is constructed with the arguments in it 64 return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), args); 65 } 66 67 static JSObject* constructWithArrayConstructor(ExecState* exec, JSObject*, const ArgList& args) 68 { 69 return constructArrayWithSizeQuirk(exec, args); 70 } 71 72 // ECMA 15.4.2 73 ConstructType ArrayConstructor::getConstructData(ConstructData& constructData) 74 { 75 constructData.native.function = constructWithArrayConstructor; 76 return ConstructTypeHost; 77 } 78 79 static JSValue JSC_HOST_CALL callArrayConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args) 80 { 81 return constructArrayWithSizeQuirk(exec, args); 82 } 83 84 // ECMA 15.6.1 85 CallType ArrayConstructor::getCallData(CallData& callData) 86 { 87 // equivalent to 'new Array(....)' 88 callData.native.function = callArrayConstructor; 89 return CallTypeHost; 90 } 91 92 JSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState*, JSObject*, JSValue, const ArgList& args) 93 { 94 return jsBoolean(args.at(0).inherits(&JSArray::info)); 95 } 96 97 } // namespace JSC 98
