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