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
ArrayConstructor(ExecState * exec,NonNullPassRefPtr<Structure> structure,ArrayPrototype * arrayPrototype,Structure * prototypeFunctionStructure)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
constructArrayWithSizeQuirk(ExecState * exec,const ArgList & args)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
constructWithArrayConstructor(ExecState * exec,JSObject *,const ArgList & args)67 static JSObject* constructWithArrayConstructor(ExecState* exec, JSObject*, const ArgList& args)
68 {
69 return constructArrayWithSizeQuirk(exec, args);
70 }
71
72 // ECMA 15.4.2
getConstructData(ConstructData & constructData)73 ConstructType ArrayConstructor::getConstructData(ConstructData& constructData)
74 {
75 constructData.native.function = constructWithArrayConstructor;
76 return ConstructTypeHost;
77 }
78
callArrayConstructor(ExecState * exec,JSObject *,JSValue,const ArgList & args)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
getCallData(CallData & callData)85 CallType ArrayConstructor::getCallData(CallData& callData)
86 {
87 // equivalent to 'new Array(....)'
88 callData.native.function = callArrayConstructor;
89 return CallTypeHost;
90 }
91
arrayConstructorIsArray(ExecState *,JSObject *,JSValue,const ArgList & args)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