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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* 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, JSObject* obj)
{
Rooted<GlobalObject*> global(cx, &obj->as<GlobalObject>());
RootedPlainObject proto(cx, NewBuiltinClassInstance<PlainObject>(cx));
if (!proto)
return nullptr;
Rooted<JSFunction*> ctor(cx, global->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);
}
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