1/* 2 * Copyright (C) 1999-2000 Harri Porten (porten@kde.org) 3 * Copyright (C) 2003, 2007, 2008, 2011 Apple Inc. All rights reserved. 4 * Copyright (C) 2003 Peter Kelly (pmk@post.com) 5 * Copyright (C) 2006 Alexey Proskuryakov (ap@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 "ButterflyInlines.h" 29#include "CopiedSpaceInlines.h" 30#include "Error.h" 31#include "ExceptionHelpers.h" 32#include "JSArray.h" 33#include "JSFunction.h" 34#include "Lookup.h" 35#include "JSCInlines.h" 36 37namespace JSC { 38 39static EncodedJSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState*); 40 41} 42 43#include "ArrayConstructor.lut.h" 44 45namespace JSC { 46 47STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(ArrayConstructor); 48 49const ClassInfo ArrayConstructor::s_info = { "Function", &InternalFunction::s_info, 0, ExecState::arrayConstructorTable, CREATE_METHOD_TABLE(ArrayConstructor) }; 50 51/* Source for ArrayConstructor.lut.h 52@begin arrayConstructorTable 53 isArray arrayConstructorIsArray DontEnum|Function 1 54@end 55*/ 56 57ArrayConstructor::ArrayConstructor(VM& vm, Structure* structure) 58 : InternalFunction(vm, structure) 59{ 60} 61 62void ArrayConstructor::finishCreation(VM& vm, ArrayPrototype* arrayPrototype) 63{ 64 Base::finishCreation(vm, arrayPrototype->classInfo()->className); 65 putDirectWithoutTransition(vm, vm.propertyNames->prototype, arrayPrototype, DontEnum | DontDelete | ReadOnly); 66 putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete); 67} 68 69bool ArrayConstructor::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot &slot) 70{ 71 return getStaticFunctionSlot<InternalFunction>(exec, ExecState::arrayConstructorTable(exec->vm()), jsCast<ArrayConstructor*>(object), propertyName, slot); 72} 73 74// ------------------------------ Functions --------------------------- 75 76JSObject* constructArrayWithSizeQuirk(ExecState* exec, ArrayAllocationProfile* profile, JSGlobalObject* globalObject, JSValue length) 77{ 78 if (!length.isNumber()) 79 return constructArrayNegativeIndexed(exec, profile, globalObject, &length, 1); 80 81 uint32_t n = length.toUInt32(exec); 82 if (n != length.toNumber(exec)) 83 return exec->vm().throwException(exec, createRangeError(exec, ASCIILiteral("Array size is not a small enough positive integer."))); 84 return constructEmptyArray(exec, profile, globalObject, n); 85} 86 87static inline JSObject* constructArrayWithSizeQuirk(ExecState* exec, const ArgList& args) 88{ 89 JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject(); 90 91 // a single numeric argument denotes the array size (!) 92 if (args.size() == 1) 93 return constructArrayWithSizeQuirk(exec, 0, globalObject, args.at(0)); 94 95 // otherwise the array is constructed with the arguments in it 96 return constructArray(exec, 0, globalObject, args); 97} 98 99static EncodedJSValue JSC_HOST_CALL constructWithArrayConstructor(ExecState* exec) 100{ 101 ArgList args(exec); 102 return JSValue::encode(constructArrayWithSizeQuirk(exec, args)); 103} 104 105ConstructType ArrayConstructor::getConstructData(JSCell*, ConstructData& constructData) 106{ 107 constructData.native.function = constructWithArrayConstructor; 108 return ConstructTypeHost; 109} 110 111static EncodedJSValue JSC_HOST_CALL callArrayConstructor(ExecState* exec) 112{ 113 ArgList args(exec); 114 return JSValue::encode(constructArrayWithSizeQuirk(exec, args)); 115} 116 117CallType ArrayConstructor::getCallData(JSCell*, CallData& callData) 118{ 119 // equivalent to 'new Array(....)' 120 callData.native.function = callArrayConstructor; 121 return CallTypeHost; 122} 123 124EncodedJSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState* exec) 125{ 126 return JSValue::encode(jsBoolean(exec->argument(0).inherits(JSArray::info()))); 127} 128 129} // namespace JSC 130