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
|
/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2003-2021 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
*
*/
#pragma once
#include "JSObject.h"
#include "RegExp.h"
#include "ThrowScope.h"
#include "TypeError.h"
namespace JSC {
class RegExpObject final : public JSNonFinalObject {
public:
using Base = JSNonFinalObject;
static constexpr unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesGetOwnSpecialPropertyNames | OverridesPut;
template<typename CellType, SubspaceAccess mode>
static IsoSubspace* subspaceFor(VM& vm)
{
static_assert(!CellType::needsDestruction, "");
return &vm.regExpObjectSpace;
}
static constexpr uintptr_t lastIndexIsNotWritableFlag = 1;
static RegExpObject* create(VM& vm, Structure* structure, RegExp* regExp)
{
RegExpObject* object = new (NotNull, allocateCell<RegExpObject>(vm.heap)) RegExpObject(vm, structure, regExp);
object->finishCreation(vm);
return object;
}
static RegExpObject* create(VM& vm, Structure* structure, RegExp* regExp, JSValue lastIndex)
{
auto* object = create(vm, structure, regExp);
object->m_lastIndex.set(vm, object, lastIndex);
return object;
}
void setRegExp(VM& vm, RegExp* regExp)
{
uintptr_t result = (m_regExpAndLastIndexIsNotWritableFlag & lastIndexIsNotWritableFlag) | bitwise_cast<uintptr_t>(regExp);
m_regExpAndLastIndexIsNotWritableFlag = result;
vm.heap.writeBarrier(this, regExp);
}
RegExp* regExp() const
{
return bitwise_cast<RegExp*>(m_regExpAndLastIndexIsNotWritableFlag & (~lastIndexIsNotWritableFlag));
}
bool setLastIndex(JSGlobalObject* globalObject, size_t lastIndex)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
if (LIKELY(lastIndexIsWritable())) {
m_lastIndex.setWithoutWriteBarrier(jsNumber(lastIndex));
return true;
}
throwTypeError(globalObject, scope, ReadonlyPropertyWriteError);
return false;
}
bool setLastIndex(JSGlobalObject* globalObject, JSValue lastIndex, bool shouldThrow)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
if (LIKELY(lastIndexIsWritable())) {
m_lastIndex.set(vm, this, lastIndex);
return true;
}
return typeError(globalObject, scope, shouldThrow, ReadonlyPropertyWriteError);
}
JSValue getLastIndex() const
{
return m_lastIndex.get();
}
bool test(JSGlobalObject* globalObject, JSString* string) { return !!match(globalObject, string); }
bool testInline(JSGlobalObject* globalObject, JSString* string) { return !!matchInline(globalObject, string); }
JSValue exec(JSGlobalObject*, JSString*);
JSValue execInline(JSGlobalObject*, JSString*);
MatchResult match(JSGlobalObject*, JSString*);
JSValue matchGlobal(JSGlobalObject*, JSString*);
static bool getOwnPropertySlot(JSObject*, JSGlobalObject*, PropertyName, PropertySlot&);
static bool put(JSCell*, JSGlobalObject*, PropertyName, JSValue, PutPropertySlot&);
DECLARE_EXPORT_INFO;
static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
{
return Structure::create(vm, globalObject, prototype, TypeInfo(RegExpObjectType, StructureFlags), info());
}
static ptrdiff_t offsetOfRegExpAndLastIndexIsNotWritableFlag()
{
return OBJECT_OFFSETOF(RegExpObject, m_regExpAndLastIndexIsNotWritableFlag);
}
static ptrdiff_t offsetOfLastIndex()
{
return OBJECT_OFFSETOF(RegExpObject, m_lastIndex);
}
static size_t allocationSize(Checked<size_t> inlineCapacity)
{
ASSERT_UNUSED(inlineCapacity, !inlineCapacity);
return sizeof(RegExpObject);
}
private:
JS_EXPORT_PRIVATE RegExpObject(VM&, Structure*, RegExp*);
JS_EXPORT_PRIVATE void finishCreation(VM&);
DECLARE_VISIT_CHILDREN;
bool lastIndexIsWritable() const
{
return !(m_regExpAndLastIndexIsNotWritableFlag & lastIndexIsNotWritableFlag);
}
void setLastIndexIsNotWritable()
{
m_regExpAndLastIndexIsNotWritableFlag = (m_regExpAndLastIndexIsNotWritableFlag | lastIndexIsNotWritableFlag);
}
JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, JSGlobalObject*, PropertyName, DeletePropertySlot&);
JS_EXPORT_PRIVATE static void getOwnSpecialPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArray&, DontEnumPropertiesMode);
JS_EXPORT_PRIVATE static bool defineOwnProperty(JSObject*, JSGlobalObject*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
MatchResult matchInline(JSGlobalObject*, JSString*);
uintptr_t m_regExpAndLastIndexIsNotWritableFlag { 0 };
WriteBarrier<Unknown> m_lastIndex;
};
} // namespace JSC
|
