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 "Lookup.h"
26 #include "NumberObject.h"
27 #include "NumberPrototype.h"
28
29 namespace JSC {
30
31 ASSERT_CLASS_FITS_IN_CELL(NumberConstructor);
32
33 static JSValue numberConstructorNaNValue(ExecState*, JSValue, const Identifier&);
34 static JSValue numberConstructorNegInfinity(ExecState*, JSValue, const Identifier&);
35 static JSValue numberConstructorPosInfinity(ExecState*, JSValue, const Identifier&);
36 static JSValue numberConstructorMaxValue(ExecState*, JSValue, const Identifier&);
37 static JSValue numberConstructorMinValue(ExecState*, JSValue, const Identifier&);
38
39 } // namespace JSC
40
41 #include "NumberConstructor.lut.h"
42
43 namespace JSC {
44
45 const ClassInfo NumberConstructor::s_info = { "Function", &InternalFunction::s_info, 0, ExecState::numberTable };
46
47 /* Source for NumberConstructor.lut.h
48 @begin numberTable
49 NaN numberConstructorNaNValue DontEnum|DontDelete|ReadOnly
50 NEGATIVE_INFINITY numberConstructorNegInfinity DontEnum|DontDelete|ReadOnly
51 POSITIVE_INFINITY numberConstructorPosInfinity DontEnum|DontDelete|ReadOnly
52 MAX_VALUE numberConstructorMaxValue DontEnum|DontDelete|ReadOnly
53 MIN_VALUE numberConstructorMinValue DontEnum|DontDelete|ReadOnly
54 @end
55 */
56
NumberConstructor(ExecState * exec,JSGlobalObject * globalObject,Structure * structure,NumberPrototype * numberPrototype)57 NumberConstructor::NumberConstructor(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, NumberPrototype* numberPrototype)
58 : InternalFunction(&exec->globalData(), globalObject, structure, Identifier(exec, numberPrototype->s_info.className))
59 {
60 ASSERT(inherits(&s_info));
61
62 // Number.Prototype
63 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().prototype, numberPrototype, DontEnum | DontDelete | ReadOnly);
64
65 // no. of arguments for constructor
66 putDirectWithoutTransition(exec->globalData(), exec->propertyNames().length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
67 }
68
getOwnPropertySlot(ExecState * exec,const Identifier & propertyName,PropertySlot & slot)69 bool NumberConstructor::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot& slot)
70 {
71 return getStaticValueSlot<NumberConstructor, InternalFunction>(exec, ExecState::numberTable(exec), this, propertyName, slot);
72 }
73
getOwnPropertyDescriptor(ExecState * exec,const Identifier & propertyName,PropertyDescriptor & descriptor)74 bool NumberConstructor::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor& descriptor)
75 {
76 return getStaticValueDescriptor<NumberConstructor, InternalFunction>(exec, ExecState::numberTable(exec), this, propertyName, descriptor);
77 }
78
numberConstructorNaNValue(ExecState *,JSValue,const Identifier &)79 static JSValue numberConstructorNaNValue(ExecState*, JSValue, const Identifier&)
80 {
81 return jsNaN();
82 }
83
numberConstructorNegInfinity(ExecState *,JSValue,const Identifier &)84 static JSValue numberConstructorNegInfinity(ExecState*, JSValue, const Identifier&)
85 {
86 return jsNumber(-Inf);
87 }
88
numberConstructorPosInfinity(ExecState *,JSValue,const Identifier &)89 static JSValue numberConstructorPosInfinity(ExecState*, JSValue, const Identifier&)
90 {
91 return jsNumber(Inf);
92 }
93
numberConstructorMaxValue(ExecState *,JSValue,const Identifier &)94 static JSValue numberConstructorMaxValue(ExecState*, JSValue, const Identifier&)
95 {
96 return jsNumber(1.7976931348623157E+308);
97 }
98
numberConstructorMinValue(ExecState *,JSValue,const Identifier &)99 static JSValue numberConstructorMinValue(ExecState*, JSValue, const Identifier&)
100 {
101 return jsNumber(5E-324);
102 }
103
104 // ECMA 15.7.1
constructWithNumberConstructor(ExecState * exec)105 static EncodedJSValue JSC_HOST_CALL constructWithNumberConstructor(ExecState* exec)
106 {
107 NumberObject* object = new (exec) NumberObject(exec->globalData(), asInternalFunction(exec->callee())->globalObject()->numberObjectStructure());
108 double n = exec->argumentCount() ? exec->argument(0).toNumber(exec) : 0;
109 object->setInternalValue(exec->globalData(), jsNumber(n));
110 return JSValue::encode(object);
111 }
112
getConstructData(ConstructData & constructData)113 ConstructType NumberConstructor::getConstructData(ConstructData& constructData)
114 {
115 constructData.native.function = constructWithNumberConstructor;
116 return ConstructTypeHost;
117 }
118
119 // ECMA 15.7.2
callNumberConstructor(ExecState * exec)120 static EncodedJSValue JSC_HOST_CALL callNumberConstructor(ExecState* exec)
121 {
122 return JSValue::encode(jsNumber(!exec->argumentCount() ? 0 : exec->argument(0).toNumber(exec)));
123 }
124
getCallData(CallData & callData)125 CallType NumberConstructor::getCallData(CallData& callData)
126 {
127 callData.native.function = callNumberConstructor;
128 return CallTypeHost;
129 }
130
131 } // namespace JSC
132