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 "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(propertyName: exec->propertyNames().prototype, value: arrayPrototype, attributes: DontEnum | DontDelete | ReadOnly); |
45 | |
46 | // no. of arguments for constructor |
47 | putDirectWithoutTransition(propertyName: exec->propertyNames().length, value: jsNumber(exec, i: 1), attributes: ReadOnly | DontEnum | DontDelete); |
48 | |
49 | // ES5 |
50 | putDirectFunctionWithoutTransition(exec, function: new (exec) NativeFunctionWrapper(exec, prototypeFunctionStructure, 1, exec->propertyNames().isArray, arrayConstructorIsArray), attr: 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(idx: 0).isNumber()) { |
57 | uint32_t n = args.at(idx: 0).toUInt32(exec); |
58 | if (n != args.at(idx: 0).toNumber(exec)) |
59 | return throwError(exec, RangeError, message: "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(b: args.at(idx: 0).inherits(classInfo: &JSArray::info)); |
95 | } |
96 | |
97 | } // namespace JSC |
98 | |