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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/*
* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
* Copyright (C) 2004, 2005, 2006, 2007, 2008 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 "StringObject.h"
#include "Error.h"
#include "JSGlobalObject.h"
#include "Operations.h"
#include "PropertyNameArray.h"
namespace JSC {
ASSERT_HAS_TRIVIAL_DESTRUCTOR(StringObject);
const ClassInfo StringObject::s_info = { "String", &JSWrapperObject::s_info, 0, 0, CREATE_METHOD_TABLE(StringObject) };
StringObject::StringObject(VM& vm, Structure* structure)
: JSWrapperObject(vm, structure)
{
}
void StringObject::finishCreation(VM& vm, JSString* string)
{
Base::finishCreation(vm);
ASSERT(inherits(&s_info));
setInternalValue(vm, string);
}
bool StringObject::getOwnPropertySlot(JSCell* cell, ExecState* exec, PropertyName propertyName, PropertySlot& slot)
{
StringObject* thisObject = jsCast<StringObject*>(cell);
if (thisObject->internalValue()->getStringPropertySlot(exec, propertyName, slot))
return true;
return JSObject::getOwnPropertySlot(thisObject, exec, propertyName, slot);
}
bool StringObject::getOwnPropertySlotByIndex(JSCell* cell, ExecState* exec, unsigned propertyName, PropertySlot& slot)
{
StringObject* thisObject = jsCast<StringObject*>(cell);
if (thisObject->internalValue()->getStringPropertySlot(exec, propertyName, slot))
return true;
return JSObject::getOwnPropertySlot(thisObject, exec, Identifier::from(exec, propertyName), slot);
}
bool StringObject::getOwnPropertyDescriptor(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor)
{
StringObject* thisObject = jsCast<StringObject*>(object);
if (thisObject->internalValue()->getStringPropertyDescriptor(exec, propertyName, descriptor))
return true;
return JSObject::getOwnPropertyDescriptor(thisObject, exec, propertyName, descriptor);
}
void StringObject::put(JSCell* cell, ExecState* exec, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
{
if (propertyName == exec->propertyNames().length) {
if (slot.isStrictMode())
throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
return;
}
JSObject::put(cell, exec, propertyName, value, slot);
}
void StringObject::putByIndex(JSCell* cell, ExecState* exec, unsigned propertyName, JSValue value, bool shouldThrow)
{
StringObject* thisObject = jsCast<StringObject*>(cell);
if (thisObject->internalValue()->canGetIndex(propertyName)) {
if (shouldThrow)
throwTypeError(exec, StrictModeReadonlyPropertyWriteError);
return;
}
JSObject::putByIndex(cell, exec, propertyName, value, shouldThrow);
}
bool StringObject::defineOwnProperty(JSObject* object, ExecState* exec, PropertyName propertyName, PropertyDescriptor& descriptor, bool throwException)
{
StringObject* thisObject = jsCast<StringObject*>(object);
if (propertyName == exec->propertyNames().length) {
if (!object->isExtensible()) {
if (throwException)
throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to define property on object that is not extensible.")));
return false;
}
if (descriptor.configurablePresent() && descriptor.configurable()) {
if (throwException)
throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to configurable attribute of unconfigurable property.")));
return false;
}
if (descriptor.enumerablePresent() && descriptor.enumerable()) {
if (throwException)
throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change enumerable attribute of unconfigurable property.")));
return false;
}
if (descriptor.isAccessorDescriptor()) {
if (throwException)
throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change access mechanism for an unconfigurable property.")));
return false;
}
if (descriptor.writablePresent() && descriptor.writable()) {
if (throwException)
throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change writable attribute of unconfigurable property.")));
return false;
}
if (!descriptor.value())
return true;
if (propertyName == exec->propertyNames().length && sameValue(exec, descriptor.value(), jsNumber(thisObject->internalValue()->length())))
return true;
if (throwException)
throwError(exec, createTypeError(exec, ASCIILiteral("Attempting to change value of a readonly property.")));
return false;
}
return Base::defineOwnProperty(object, exec, propertyName, descriptor, throwException);
}
bool StringObject::deleteProperty(JSCell* cell, ExecState* exec, PropertyName propertyName)
{
StringObject* thisObject = jsCast<StringObject*>(cell);
if (propertyName == exec->propertyNames().length)
return false;
unsigned i = propertyName.asIndex();
if (thisObject->internalValue()->canGetIndex(i)) {
ASSERT(i != PropertyName::NotAnIndex); // No need for an explicit check, the above test would always fail!
return false;
}
return JSObject::deleteProperty(thisObject, exec, propertyName);
}
bool StringObject::deletePropertyByIndex(JSCell* cell, ExecState* exec, unsigned i)
{
StringObject* thisObject = jsCast<StringObject*>(cell);
if (thisObject->internalValue()->canGetIndex(i))
return false;
return JSObject::deletePropertyByIndex(thisObject, exec, i);
}
void StringObject::getOwnPropertyNames(JSObject* object, ExecState* exec, PropertyNameArray& propertyNames, EnumerationMode mode)
{
StringObject* thisObject = jsCast<StringObject*>(object);
int size = thisObject->internalValue()->length();
for (int i = 0; i < size; ++i)
propertyNames.add(Identifier(exec, String::number(i)));
if (mode == IncludeDontEnumProperties)
propertyNames.add(exec->propertyNames().length);
return JSObject::getOwnPropertyNames(thisObject, exec, propertyNames, mode);
}
StringObject* constructString(ExecState* exec, JSGlobalObject* globalObject, JSValue string)
{
StringObject* object = StringObject::create(exec, globalObject->stringObjectStructure());
object->setInternalValue(exec->vm(), string);
return object;
}
} // namespace JSC
|
