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 "JSArray.h"
29 #include "Lookup.h"
30
31 namespace JSC {
32
33 ASSERT_CLASS_FITS_IN_CELL(ArrayConstructor);
34
ArrayConstructor(ExecState * exec,PassRefPtr<Structure> structure,ArrayPrototype * arrayPrototype)35 ArrayConstructor::ArrayConstructor(ExecState* exec, PassRefPtr<Structure> structure, ArrayPrototype* arrayPrototype)
36 : InternalFunction(&exec->globalData(), structure, Identifier(exec, arrayPrototype->classInfo()->className))
37 {
38 // ECMA 15.4.3.1 Array.prototype
39 putDirectWithoutTransition(exec->propertyNames().prototype, arrayPrototype, DontEnum | DontDelete | ReadOnly);
40
41 // no. of arguments for constructor
42 putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
43 }
44
constructArrayWithSizeQuirk(ExecState * exec,const ArgList & args)45 static JSObject* constructArrayWithSizeQuirk(ExecState* exec, const ArgList& args)
46 {
47 // a single numeric argument denotes the array size (!)
48 if (args.size() == 1 && args.at(exec, 0).isNumber()) {
49 uint32_t n = args.at(exec, 0).toUInt32(exec);
50 if (n != args.at(exec, 0).toNumber(exec))
51 return throwError(exec, RangeError, "Array size is not a small enough positive integer.");
52 return new (exec) JSArray(exec->lexicalGlobalObject()->arrayStructure(), n);
53 }
54
55 // otherwise the array is constructed with the arguments in it
56 return new (exec) JSArray(exec, exec->lexicalGlobalObject()->arrayStructure(), args);
57 }
58
constructWithArrayConstructor(ExecState * exec,JSObject *,const ArgList & args)59 static JSObject* constructWithArrayConstructor(ExecState* exec, JSObject*, const ArgList& args)
60 {
61 return constructArrayWithSizeQuirk(exec, args);
62 }
63
64 // ECMA 15.4.2
getConstructData(ConstructData & constructData)65 ConstructType ArrayConstructor::getConstructData(ConstructData& constructData)
66 {
67 constructData.native.function = constructWithArrayConstructor;
68 return ConstructTypeHost;
69 }
70
callArrayConstructor(ExecState * exec,JSObject *,JSValuePtr,const ArgList & args)71 static JSValuePtr callArrayConstructor(ExecState* exec, JSObject*, JSValuePtr, const ArgList& args)
72 {
73 return constructArrayWithSizeQuirk(exec, args);
74 }
75
76 // ECMA 15.6.1
getCallData(CallData & callData)77 CallType ArrayConstructor::getCallData(CallData& callData)
78 {
79 // equivalent to 'new Array(....)'
80 callData.native.function = callArrayConstructor;
81 return CallTypeHost;
82 }
83
84 } // namespace JSC
85