1/*
2 * Copyright (C) 1999-2000,2003 Harri Porten (porten@kde.org)
3 * Copyright (C) 2007, 2008 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
18 * USA
19 *
20 */
21
22#include "config.h"
23#include "NumberConstructor.h"
24
25#include "NumberObject.h"
26#include "NumberPrototype.h"
27
28namespace JSC {
29
30ASSERT_CLASS_FITS_IN_CELL(NumberConstructor);
31
32static JSValue numberConstructorNaNValue(ExecState*, const Identifier&, const PropertySlot&);
33static JSValue numberConstructorNegInfinity(ExecState*, const Identifier&, const PropertySlot&);
34static JSValue numberConstructorPosInfinity(ExecState*, const Identifier&, const PropertySlot&);
35static JSValue numberConstructorMaxValue(ExecState*, const Identifier&, const PropertySlot&);
36static JSValue numberConstructorMinValue(ExecState*, const Identifier&, const PropertySlot&);
37
38} // namespace JSC
39
40#include "NumberConstructor.lut.h"
41
42namespace JSC {
43
44const ClassInfo NumberConstructor::info = { .className: "Function", .parentClass: &InternalFunction::info, .staticPropHashTable: 0, .classPropHashTableGetterFunction: ExecState::numberTable };
45
46/* Source for NumberConstructor.lut.h
47@begin numberTable
48 NaN numberConstructorNaNValue DontEnum|DontDelete|ReadOnly
49 NEGATIVE_INFINITY numberConstructorNegInfinity DontEnum|DontDelete|ReadOnly
50 POSITIVE_INFINITY numberConstructorPosInfinity DontEnum|DontDelete|ReadOnly
51 MAX_VALUE numberConstructorMaxValue DontEnum|DontDelete|ReadOnly
52 MIN_VALUE numberConstructorMinValue DontEnum|DontDelete|ReadOnly
53@end
54*/
55
56NumberConstructor::NumberConstructor(ExecState* exec, NonNullPassRefPtr<Structure> structure, NumberPrototype* numberPrototype)
57 : InternalFunction(&exec->globalData(), structure, Identifier(exec, numberPrototype->info.className))
58{
59 // Number.Prototype
60 putDirectWithoutTransition(propertyName: exec->propertyNames().prototype, value: numberPrototype, attributes: DontEnum | DontDelete | ReadOnly);
61
62 // no. of arguments for constructor
63 putDirectWithoutTransition(propertyName: exec->propertyNames().length, value: jsNumber(exec, i: 1), attributes: ReadOnly | DontEnum | DontDelete);
64}
65
66bool NumberConstructor::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
67{
68 return getStaticValueSlot<NumberConstructor, InternalFunction>(exec, table: ExecState::numberTable(callFrame: exec), thisObj: this, propertyName, slot);
69}
70
71bool NumberConstructor::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
72{
73 return getStaticValueDescriptor<NumberConstructor, InternalFunction>(exec, table: ExecState::numberTable(callFrame: exec), thisObj: this, propertyName, descriptor);
74}
75
76static JSValue numberConstructorNaNValue(ExecState* exec, const Identifier&, const PropertySlot&)
77{
78 return jsNaN(exec);
79}
80
81static JSValue numberConstructorNegInfinity(ExecState* exec, const Identifier&, const PropertySlot&)
82{
83 return jsNumber(exec, d: -Inf);
84}
85
86static JSValue numberConstructorPosInfinity(ExecState* exec, const Identifier&, const PropertySlot&)
87{
88 return jsNumber(exec, d: Inf);
89}
90
91static JSValue numberConstructorMaxValue(ExecState* exec, const Identifier&, const PropertySlot&)
92{
93 return jsNumber(exec, d: 1.7976931348623157E+308);
94}
95
96static JSValue numberConstructorMinValue(ExecState* exec, const Identifier&, const PropertySlot&)
97{
98 return jsNumber(exec, d: 5E-324);
99}
100
101// ECMA 15.7.1
102static JSObject* constructWithNumberConstructor(ExecState* exec, JSObject*, const ArgList& args)
103{
104 NumberObject* object = new (exec) NumberObject(exec->lexicalGlobalObject()->numberObjectStructure());
105 double n = args.isEmpty() ? 0 : args.at(idx: 0).toNumber(exec);
106 object->setInternalValue(jsNumber(exec, d: n));
107 return object;
108}
109
110ConstructType NumberConstructor::getConstructData(ConstructData& constructData)
111{
112 constructData.native.function = constructWithNumberConstructor;
113 return ConstructTypeHost;
114}
115
116// ECMA 15.7.2
117static JSValue JSC_HOST_CALL callNumberConstructor(ExecState* exec, JSObject*, JSValue, const ArgList& args)
118{
119 return jsNumber(exec, d: args.isEmpty() ? 0 : args.at(idx: 0).toNumber(exec));
120}
121
122CallType NumberConstructor::getCallData(CallData& callData)
123{
124 callData.native.function = callNumberConstructor;
125 return CallTypeHost;
126}
127
128} // namespace JSC
129

source code of qtscript/src/3rdparty/javascriptcore/JavaScriptCore/runtime/NumberConstructor.cpp