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
|
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "builtin/WeakSetObject.h"
#include "jsapi.h"
#include "jscntxt.h"
#include "jsiter.h"
#include "builtin/MapObject.h"
#include "builtin/SelfHostingDefines.h"
#include "builtin/WeakMapObject.h"
#include "vm/GlobalObject.h"
#include "vm/SelfHosting.h"
#include "jsobjinlines.h"
#include "vm/Interpreter-inl.h"
#include "vm/NativeObject-inl.h"
using namespace js;
const Class WeakSetObject::class_ = {
"WeakSet",
JSCLASS_HAS_CACHED_PROTO(JSProto_WeakSet) |
JSCLASS_HAS_RESERVED_SLOTS(WeakSetObject::RESERVED_SLOTS)
};
const JSPropertySpec WeakSetObject::properties[] = {
JS_PS_END
};
const JSFunctionSpec WeakSetObject::methods[] = {
JS_SELF_HOSTED_FN("add", "WeakSet_add", 1, 0),
JS_SELF_HOSTED_FN("delete", "WeakSet_delete", 1, 0),
JS_SELF_HOSTED_FN("has", "WeakSet_has", 1, 0),
JS_FS_END
};
JSObject*
WeakSetObject::initClass(JSContext* cx, HandleObject obj)
{
Handle<GlobalObject*> global = obj.as<GlobalObject>();
RootedPlainObject proto(cx, NewBuiltinClassInstance<PlainObject>(cx));
if (!proto)
return nullptr;
Rooted<JSFunction*> ctor(cx, GlobalObject::createConstructor(cx, construct,
ClassName(JSProto_WeakSet, cx), 0));
if (!ctor ||
!LinkConstructorAndPrototype(cx, ctor, proto) ||
!DefinePropertiesAndFunctions(cx, proto, properties, methods) ||
!DefineToStringTag(cx, proto, cx->names().WeakSet) ||
!GlobalObject::initBuiltinConstructor(cx, global, JSProto_WeakSet, ctor, proto))
{
return nullptr;
}
return proto;
}
WeakSetObject*
WeakSetObject::create(JSContext* cx, HandleObject proto /* = nullptr */)
{
RootedObject map(cx, NewBuiltinClassInstance<WeakMapObject>(cx));
if (!map)
return nullptr;
WeakSetObject* obj = NewObjectWithClassProto<WeakSetObject>(cx, proto);
if (!obj)
return nullptr;
obj->setReservedSlot(WEAKSET_MAP_SLOT, ObjectValue(*map));
return obj;
}
bool
WeakSetObject::isBuiltinAdd(HandleValue add, JSContext* cx)
{
JSFunction* addFn;
return IsFunctionObject(add, &addFn) && IsSelfHostedFunctionWithName(addFn, cx->names().WeakSet_add);
}
bool
WeakSetObject::construct(JSContext* cx, unsigned argc, Value* vp)
{
// Based on our "Set" implementation instead of the more general ES6 steps.
CallArgs args = CallArgsFromVp(argc, vp);
if (!ThrowIfNotConstructing(cx, args, "WeakSet"))
return false;
RootedObject proto(cx);
RootedObject newTarget(cx, &args.newTarget().toObject());
if (!GetPrototypeFromConstructor(cx, newTarget, &proto))
return false;
Rooted<WeakSetObject*> obj(cx, WeakSetObject::create(cx, proto));
if (!obj)
return false;
if (!args.get(0).isNullOrUndefined()) {
RootedValue iterable(cx, args[0]);
bool optimized = false;
if (!IsOptimizableInitForSet<GlobalObject::getOrCreateWeakSetPrototype, isBuiltinAdd>(cx, obj, iterable, &optimized))
return false;
if (optimized) {
RootedValue keyVal(cx);
RootedObject keyObject(cx);
RootedValue placeholder(cx, BooleanValue(true));
RootedObject map(cx, &obj->getReservedSlot(WEAKSET_MAP_SLOT).toObject());
RootedArrayObject array(cx, &iterable.toObject().as<ArrayObject>());
for (uint32_t index = 0; index < array->getDenseInitializedLength(); ++index) {
keyVal.set(array->getDenseElement(index));
MOZ_ASSERT(!keyVal.isMagic(JS_ELEMENTS_HOLE));
if (keyVal.isPrimitive()) {
UniqueChars bytes =
DecompileValueGenerator(cx, JSDVG_SEARCH_STACK, keyVal, nullptr);
if (!bytes)
return false;
JS_ReportErrorNumberLatin1(cx, GetErrorMessage, nullptr,
JSMSG_NOT_NONNULL_OBJECT, bytes.get());
return false;
}
keyObject = &keyVal.toObject();
if (!SetWeakMapEntry(cx, map, keyObject, placeholder))
return false;
}
} else {
FixedInvokeArgs<1> args2(cx);
args2[0].set(args[0]);
RootedValue thisv(cx, ObjectValue(*obj));
if (!CallSelfHostedFunction(cx, cx->names().WeakSetConstructorInit, thisv, args2, args2.rval()))
return false;
}
}
args.rval().setObject(*obj);
return true;
}
JSObject*
js::InitWeakSetClass(JSContext* cx, HandleObject obj)
{
return WeakSetObject::initClass(cx, obj);
}
JS_FRIEND_API(bool)
JS_NondeterministicGetWeakSetKeys(JSContext* cx, HandleObject objArg, MutableHandleObject ret)
{
RootedObject obj(cx, objArg);
obj = UncheckedUnwrap(obj);
if (!obj || !obj->is<WeakSetObject>()) {
ret.set(nullptr);
return true;
}
Rooted<WeakSetObject*> weakset(cx, &obj->as<WeakSetObject>());
if (!weakset)
return false;
RootedObject map(cx, &weakset->getReservedSlot(WEAKSET_MAP_SLOT).toObject());
return JS_NondeterministicGetWeakMapKeys(cx, map, ret);
}
|
