1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/*
* Copyright (C) 1999-2000,2003 Harri Porten (porten@kde.org)
* Copyright (C) 2007, 2008, 2011, 2015-2016 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
* USA
*
*/
#include "config.h"
#include "NumberConstructor.h"
#include "Lookup.h"
#include "NumberObject.h"
#include "NumberPrototype.h"
#include "JSCInlines.h"
#include "JSGlobalObjectFunctions.h"
#include "StructureInlines.h"
namespace JSC {
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsFinite(ExecState*);
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsInteger(ExecState*);
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsNaN(ExecState*);
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsSafeInteger(ExecState*);
} // namespace JSC
namespace JSC {
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(NumberConstructor);
const ClassInfo NumberConstructor::s_info = { "Function", &InternalFunction::s_info, 0, CREATE_METHOD_TABLE(NumberConstructor) };
NumberConstructor::NumberConstructor(VM& vm, Structure* structure)
: InternalFunction(vm, structure)
{
}
void NumberConstructor::finishCreation(VM& vm, NumberPrototype* numberPrototype)
{
Base::finishCreation(vm, NumberPrototype::info()->className);
ASSERT(inherits(info()));
// Number.Prototype
putDirectWithoutTransition(vm, vm.propertyNames->prototype, numberPrototype, DontEnum | DontDelete | ReadOnly);
// no. of arguments for constructor
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(1), ReadOnly | DontEnum | DontDelete);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "EPSILON"), jsDoubleNumber(std::numeric_limits<double>::epsilon()), DontDelete | DontEnum | ReadOnly);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "MAX_VALUE"), jsDoubleNumber(1.7976931348623157E+308), DontDelete | DontEnum | ReadOnly);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "MIN_VALUE"), jsDoubleNumber(5E-324), DontDelete | DontEnum | ReadOnly);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "MAX_SAFE_INTEGER"), jsDoubleNumber(9007199254740991.0), DontDelete | DontEnum | ReadOnly);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "MIN_SAFE_INTEGER"), jsDoubleNumber(-9007199254740991.0), DontDelete | DontEnum | ReadOnly);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "NEGATIVE_INFINITY"), jsDoubleNumber(-std::numeric_limits<double>::infinity()), DontDelete | DontEnum | ReadOnly);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "POSITIVE_INFINITY"), jsDoubleNumber(std::numeric_limits<double>::infinity()), DontDelete | DontEnum | ReadOnly);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "NaN"), jsNaN(), DontDelete | DontEnum | ReadOnly);
putDirectNativeFunctionWithoutTransition(vm, numberPrototype->globalObject(), Identifier::fromString(&vm, "isFinite"), 1, numberConstructorFuncIsFinite, NoIntrinsic, DontEnum);
putDirectNativeFunctionWithoutTransition(vm, numberPrototype->globalObject(), Identifier::fromString(&vm, "isInteger"), 1, numberConstructorFuncIsInteger, NoIntrinsic, DontEnum);
putDirectNativeFunctionWithoutTransition(vm, numberPrototype->globalObject(), Identifier::fromString(&vm, "isNaN"), 1, numberConstructorFuncIsNaN, NoIntrinsic, DontEnum);
putDirectNativeFunctionWithoutTransition(vm, numberPrototype->globalObject(), Identifier::fromString(&vm, "isSafeInteger"), 1, numberConstructorFuncIsSafeInteger, NoIntrinsic, DontEnum);
putDirectNativeFunctionWithoutTransition(vm, numberPrototype->globalObject(), Identifier::fromString(&vm, "parseFloat"), 1, globalFuncParseFloat, NoIntrinsic, DontEnum);
putDirectWithoutTransition(vm, Identifier::fromString(&vm, "parseInt"), numberPrototype->globalObject()->parseIntFunction(), DontEnum);
}
// ECMA 15.7.1
static EncodedJSValue JSC_HOST_CALL constructWithNumberConstructor(ExecState* exec)
{
double n = exec->argumentCount() ? exec->uncheckedArgument(0).toNumber(exec) : 0;
NumberObject* object = NumberObject::create(exec->vm(), InternalFunction::createSubclassStructure(exec, exec->newTarget(), asInternalFunction(exec->callee())->globalObject()->numberObjectStructure()));
object->setInternalValue(exec->vm(), jsNumber(n));
return JSValue::encode(object);
}
ConstructType NumberConstructor::getConstructData(JSCell*, ConstructData& constructData)
{
constructData.native.function = constructWithNumberConstructor;
return ConstructTypeHost;
}
// ECMA 15.7.2
static EncodedJSValue JSC_HOST_CALL callNumberConstructor(ExecState* exec)
{
return JSValue::encode(jsNumber(!exec->argumentCount() ? 0 : exec->uncheckedArgument(0).toNumber(exec)));
}
CallType NumberConstructor::getCallData(JSCell*, CallData& callData)
{
callData.native.function = callNumberConstructor;
return CallTypeHost;
}
// ECMA-262 20.1.2.2
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsFinite(ExecState* exec)
{
JSValue argument = exec->argument(0);
return JSValue::encode(jsBoolean(argument.isNumber() && (argument.isInt32() || std::isfinite(argument.asDouble()))));
}
// ECMA-262 20.1.2.3
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsInteger(ExecState* exec)
{
JSValue argument = exec->argument(0);
bool isInteger;
if (argument.isInt32())
isInteger = true;
else if (!argument.isDouble())
isInteger = false;
else {
double number = argument.asDouble();
isInteger = std::isfinite(number) && trunc(number) == number;
}
return JSValue::encode(jsBoolean(isInteger));
}
// ECMA-262 20.1.2.4
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsNaN(ExecState* exec)
{
JSValue argument = exec->argument(0);
return JSValue::encode(jsBoolean(argument.isDouble() && std::isnan(argument.asDouble())));
}
// ECMA-262 20.1.2.5
static EncodedJSValue JSC_HOST_CALL numberConstructorFuncIsSafeInteger(ExecState* exec)
{
JSValue argument = exec->argument(0);
bool isInteger;
if (argument.isInt32())
isInteger = true;
else if (!argument.isDouble())
isInteger = false;
else {
double number = argument.asDouble();
isInteger = trunc(number) == number && std::abs(number) <= 9007199254740991.0;
}
return JSValue::encode(jsBoolean(isInteger));
}
} // namespace JSC
|
