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
28 namespace JSC {
29
30 ASSERT_CLASS_FITS_IN_CELL(NumberConstructor);
31
32 static JSValuePtr numberConstructorNaNValue(ExecState*, const Identifier&, const PropertySlot&);
33 static JSValuePtr numberConstructorNegInfinity(ExecState*, const Identifier&, const PropertySlot&);
34 static JSValuePtr numberConstructorPosInfinity(ExecState*, const Identifier&, const PropertySlot&);
35 static JSValuePtr numberConstructorMaxValue(ExecState*, const Identifier&, const PropertySlot&);
36 static JSValuePtr numberConstructorMinValue(ExecState*, const Identifier&, const PropertySlot&);
37
38 } // namespace JSC
39
40 #include "NumberConstructor.lut.h"
41
42 namespace JSC {
43
44 const ClassInfo NumberConstructor::info = { "Function", &InternalFunction::info, 0, 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
NumberConstructor(ExecState * exec,PassRefPtr<Structure> structure,NumberPrototype * numberPrototype)56 NumberConstructor::NumberConstructor(ExecState* exec, PassRefPtr<Structure> structure, NumberPrototype* numberPrototype)
57 : InternalFunction(&exec->globalData(), structure, Identifier(exec, numberPrototype->info.className))
58 {
59 // Number.Prototype
60 putDirectWithoutTransition(exec->propertyNames().prototype, numberPrototype, DontEnum | DontDelete | ReadOnly);
61
62 // no. of arguments for constructor
63 putDirectWithoutTransition(exec->propertyNames().length, jsNumber(exec, 1), ReadOnly | DontEnum | DontDelete);
64 }
65
getOwnPropertySlot(ExecState * exec,const Identifier & propertyName,PropertySlot & slot)66 bool NumberConstructor::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
67 {
68 return getStaticValueSlot<NumberConstructor, InternalFunction>(exec, ExecState::numberTable(exec), this, propertyName, slot);
69 }
70
numberConstructorNaNValue(ExecState * exec,const Identifier &,const PropertySlot &)71 JSValuePtr numberConstructorNaNValue(ExecState* exec, const Identifier&, const PropertySlot&)
72 {
73 return jsNaN(exec);
74 }
75
numberConstructorNegInfinity(ExecState * exec,const Identifier &,const PropertySlot &)76 JSValuePtr numberConstructorNegInfinity(ExecState* exec, const Identifier&, const PropertySlot&)
77 {
78 return jsNumber(exec, -Inf);
79 }
80
numberConstructorPosInfinity(ExecState * exec,const Identifier &,const PropertySlot &)81 JSValuePtr numberConstructorPosInfinity(ExecState* exec, const Identifier&, const PropertySlot&)
82 {
83 return jsNumber(exec, Inf);
84 }
85
numberConstructorMaxValue(ExecState * exec,const Identifier &,const PropertySlot &)86 JSValuePtr numberConstructorMaxValue(ExecState* exec, const Identifier&, const PropertySlot&)
87 {
88 return jsNumber(exec, 1.7976931348623157E+308);
89 }
90
numberConstructorMinValue(ExecState * exec,const Identifier &,const PropertySlot &)91 JSValuePtr numberConstructorMinValue(ExecState* exec, const Identifier&, const PropertySlot&)
92 {
93 return jsNumber(exec, 5E-324);
94 }
95
96 // ECMA 15.7.1
constructWithNumberConstructor(ExecState * exec,JSObject *,const ArgList & args)97 static JSObject* constructWithNumberConstructor(ExecState* exec, JSObject*, const ArgList& args)
98 {
99 NumberObject* object = new (exec) NumberObject(exec->lexicalGlobalObject()->numberObjectStructure());
100 double n = args.isEmpty() ? 0 : args.at(exec, 0).toNumber(exec);
101 object->setInternalValue(jsNumber(exec, n));
102 return object;
103 }
104
getConstructData(ConstructData & constructData)105 ConstructType NumberConstructor::getConstructData(ConstructData& constructData)
106 {
107 constructData.native.function = constructWithNumberConstructor;
108 return ConstructTypeHost;
109 }
110
111 // ECMA 15.7.2
callNumberConstructor(ExecState * exec,JSObject *,JSValuePtr,const ArgList & args)112 static JSValuePtr callNumberConstructor(ExecState* exec, JSObject*, JSValuePtr, const ArgList& args)
113 {
114 return jsNumber(exec, args.isEmpty() ? 0 : args.at(exec, 0).toNumber(exec));
115 }
116
getCallData(CallData & callData)117 CallType NumberConstructor::getCallData(CallData& callData)
118 {
119 callData.native.function = callNumberConstructor;
120 return CallTypeHost;
121 }
122
123 } // namespace JSC
124