Rewrite Function.bind as a builtin
[WebKit.git] / Source / JavaScriptCore / runtime / NumberConstructor.cpp
1 /*
2  *  Copyright (C) 1999-2000,2003 Harri Porten (porten@kde.org)
3  *  Copyright (C) 2007, 2008, 2011 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 #include "JSCInlines.h"
29
30 namespace JSC {
31
32 static EncodedJSValue numberConstructorNaNValue(ExecState*, JSObject*, EncodedJSValue, PropertyName);
33 static EncodedJSValue numberConstructorNegInfinity(ExecState*, JSObject*, EncodedJSValue, PropertyName);
34 static EncodedJSValue numberConstructorPosInfinity(ExecState*, JSObject*, EncodedJSValue, PropertyName);
35 static EncodedJSValue numberConstructorMaxValue(ExecState*, JSObject*, EncodedJSValue, PropertyName);
36 static EncodedJSValue numberConstructorMinValue(ExecState*, JSObject*, EncodedJSValue, PropertyName);
37
38 } // namespace JSC
39
40 #include "NumberConstructor.lut.h"
41
42 namespace JSC {
43
44 STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(NumberConstructor);
45
46 const ClassInfo NumberConstructor::s_info = { "Function", &InternalFunction::s_info, 0, ExecState::numberConstructorTable, CREATE_METHOD_TABLE(NumberConstructor) };
47
48 /* Source for NumberConstructor.lut.h
49 @begin numberConstructorTable
50    NaN                   numberConstructorNaNValue       DontEnum|DontDelete|ReadOnly
51    NEGATIVE_INFINITY     numberConstructorNegInfinity    DontEnum|DontDelete|ReadOnly
52    POSITIVE_INFINITY     numberConstructorPosInfinity    DontEnum|DontDelete|ReadOnly
53    MAX_VALUE             numberConstructorMaxValue       DontEnum|DontDelete|ReadOnly
54    MIN_VALUE             numberConstructorMinValue       DontEnum|DontDelete|ReadOnly
55 @end
56 */
57
58 NumberConstructor::NumberConstructor(VM& vm, Structure* structure)
59     : InternalFunction(vm, structure)
60 {
61 }
62
63 void NumberConstructor::finishCreation(VM& vm, NumberPrototype* numberPrototype)
64 {
65     Base::finishCreation(vm, NumberPrototype::info()->className);
66     ASSERT(inherits(info()));
67
68     // Number.Prototype
69     putDirectPrototypePropertyWithoutTransitions(vm, numberPrototype, DontEnum | DontDelete | ReadOnly);
70
71     // no. of arguments for constructor
72     putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
73 }
74
75 bool NumberConstructor::getOwnPropertySlot(JSObject* object, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
76 {
77     return getStaticValueSlot<NumberConstructor, InternalFunction>(exec, ExecState::numberConstructorTable(exec->vm()), jsCast<NumberConstructor*>(object), propertyName, slot);
78 }
79
80 static EncodedJSValue numberConstructorNaNValue(ExecState*, JSObject*, EncodedJSValue, PropertyName)
81 {
82     return JSValue::encode(jsNaN());
83 }
84
85 static EncodedJSValue numberConstructorNegInfinity(ExecState*, JSObject*, EncodedJSValue, PropertyName)
86 {
87     return JSValue::encode(jsNumber(-std::numeric_limits<double>::infinity()));
88 }
89
90 static EncodedJSValue numberConstructorPosInfinity(ExecState*, JSObject*, EncodedJSValue, PropertyName)
91 {
92     return JSValue::encode(jsNumber(std::numeric_limits<double>::infinity()));
93 }
94
95 static EncodedJSValue numberConstructorMaxValue(ExecState*, JSObject*, EncodedJSValue, PropertyName)
96 {
97     return JSValue::encode(jsNumber(1.7976931348623157E+308));
98 }
99
100 static EncodedJSValue numberConstructorMinValue(ExecState*, JSObject*, EncodedJSValue, PropertyName)
101 {
102     return JSValue::encode(jsNumber(5E-324));
103 }
104
105 // ECMA 15.7.1
106 static EncodedJSValue JSC_HOST_CALL constructWithNumberConstructor(ExecState* exec)
107 {
108     NumberObject* object = NumberObject::create(exec->vm(), asInternalFunction(exec->callee())->globalObject()->numberObjectStructure());
109     double n = exec->argumentCount() ? exec->uncheckedArgument(0).toNumber(exec) : 0;
110     object->setInternalValue(exec->vm(), jsNumber(n));
111     return JSValue::encode(object);
112 }
113
114 ConstructType NumberConstructor::getConstructData(JSCell*, ConstructData& constructData)
115 {
116     constructData.native.function = constructWithNumberConstructor;
117     return ConstructTypeHost;
118 }
119
120 // ECMA 15.7.2
121 static EncodedJSValue JSC_HOST_CALL callNumberConstructor(ExecState* exec)
122 {
123     return JSValue::encode(jsNumber(!exec->argumentCount() ? 0 : exec->uncheckedArgument(0).toNumber(exec)));
124 }
125
126 CallType NumberConstructor::getCallData(JSCell*, CallData& callData)
127 {
128     callData.native.function = callNumberConstructor;
129     return CallTypeHost;
130 }
131
132 } // namespace JSC