1 /*
2 * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
3 * Copyright (C) 2003, 2007, 2008 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 "Error.h"
29 #include "ExceptionHelpers.h"
30 #include "JSArray.h"
31 #include "JSFunction.h"
32 #include "Lookup.h"
33
34 namespace JSC {
35
36 ASSERT_CLASS_FITS_IN_CELL(ArrayConstructor);
37
38 static EncodedJSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState*);
39
ArrayConstructor(ExecState * exec,JSGlobalObject * globalObject,Structure * structure,ArrayPrototype * arrayPrototype,Structure * functionStructure)40 ArrayConstructor::ArrayConstructor(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, ArrayPrototype* arrayPrototype, Structure* functionStructure)
41 : InternalFunction(&exec->globalData(), globalObject, structure, Identifier(exec, arrayPrototype->classInfo()->className))
42 {
43 // ECMA 15.4.3.1 Array.prototype
44 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().prototype, arrayPrototype, DontEnum | DontDelete | ReadOnly);
45
46 // no. of arguments for constructor
47 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
48
49 // ES5
50 putDirectFunctionWithoutTransition(exec, new (exec) JSFunction(exec, globalObject, functionStructure, 1, exec->propertyNames().isArray, arrayConstructorIsArray), DontEnum);
51 }
52
constructArrayWithSizeQuirk(ExecState * exec,const ArgList & args)53 static inline JSObject* constructArrayWithSizeQuirk(ExecState* exec, const ArgList& args)
54 {
55 JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject();
56
57 // a single numeric argument denotes the array size (!)
58 if (args.size() == 1 && args.at(0).isNumber()) {
59 uint32_t n = args.at(0).toUInt32(exec);
60 if (n != args.at(0).toNumber(exec))
61 return throwError(exec, createRangeError(exec, "Array size is not a small enough positive integer."));
62 return new (exec) JSArray(exec->globalData(), globalObject->arrayStructure(), n, CreateInitialized);
63 }
64
65 // otherwise the array is constructed with the arguments in it
66 return new (exec) JSArray(exec->globalData(), globalObject->arrayStructure(), args);
67 }
68
constructWithArrayConstructor(ExecState * exec)69 static EncodedJSValue JSC_HOST_CALL constructWithArrayConstructor(ExecState* exec)
70 {
71 ArgList args(exec);
72 return JSValue::encode(constructArrayWithSizeQuirk(exec, args));
73 }
74
75 // ECMA 15.4.2
getConstructData(ConstructData & constructData)76 ConstructType ArrayConstructor::getConstructData(ConstructData& constructData)
77 {
78 constructData.native.function = constructWithArrayConstructor;
79 return ConstructTypeHost;
80 }
81
callArrayConstructor(ExecState * exec)82 static EncodedJSValue JSC_HOST_CALL callArrayConstructor(ExecState* exec)
83 {
84 ArgList args(exec);
85 return JSValue::encode(constructArrayWithSizeQuirk(exec, args));
86 }
87
88 // ECMA 15.6.1
getCallData(CallData & callData)89 CallType ArrayConstructor::getCallData(CallData& callData)
90 {
91 // equivalent to 'new Array(....)'
92 callData.native.function = callArrayConstructor;
93 return CallTypeHost;
94 }
95
arrayConstructorIsArray(ExecState * exec)96 EncodedJSValue JSC_HOST_CALL arrayConstructorIsArray(ExecState* exec)
97 {
98 return JSValue::encode(jsBoolean(exec->argument(0).inherits(&JSArray::s_info)));
99 }
100
101 } // namespace JSC
102