1/*
2 * Copyright (C) 1999-2000 Harri Porten ([email protected])
3 * Copyright (C) 2008-2019 Apple Inc. All rights reserved.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 */
20
21#pragma once
22
23#include "InternalFunction.h"
24
25namespace JSC {
26
27class NumberPrototype;
28class GetterSetter;
29
30class NumberConstructor final : public InternalFunction {
31public:
32 typedef InternalFunction Base;
33 static constexpr unsigned StructureFlags = Base::StructureFlags | ImplementsHasInstance | HasStaticPropertyTable;
34
35 static NumberConstructor* create(VM& vm, Structure* structure, NumberPrototype* numberPrototype, GetterSetter*)
36 {
37 NumberConstructor* constructor = new (NotNull, allocateCell<NumberConstructor>(vm.heap)) NumberConstructor(vm, structure);
38 constructor->finishCreation(vm, numberPrototype);
39 return constructor;
40 }
41
42 DECLARE_INFO;
43
44 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
45 {
46 return Structure::create(vm, globalObject, proto, TypeInfo(InternalFunctionType, StructureFlags), info());
47 }
48
49 static bool isIntegerImpl(JSValue value)
50 {
51 if (value.isInt32())
52 return true;
53 if (!value.isDouble())
54 return false;
55
56 double number = value.asDouble();
57 return std::isfinite(number) && trunc(number) == number;
58 }
59
60protected:
61 void finishCreation(VM&, NumberPrototype*);
62
63private:
64 NumberConstructor(VM&, Structure*);
65};
66
67} // namespace JSC
68