1  /*
 2   * Copyright (C) 2015-2017 Apple, Inc. All rights reserved.
 3   *
 4   * Redistribution and use in source and binary forms, with or without
 5   * modification, are permitted provided that the following conditions
 6   * are met:
 7   * 1. Redistributions of source code must retain the above copyright
 8   *    notice, this list of conditions and the following disclaimer.
 9   * 2. Redistributions in binary form must reproduce the above copyright
10   *    notice, this list of conditions and the following disclaimer in the
11   *    documentation and/or other materials provided with the distribution.
12   *
13   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
24   */
25  
26  #include "config.h"
27  #include "WeakSetConstructor.h"
28  
29  #include "IteratorOperations.h"
30  #include "JSCInlines.h"
31  #include "JSWeakSet.h"
32  #include "WeakSetPrototype.h"
33  
34  namespace JSC {
35  
36  const ClassInfo WeakSetConstructor::s_info = { "Function", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(WeakSetConstructor) };
37  
38  void WeakSetConstructor::finishCreation(VM& vm, WeakSetPrototype* prototype)
39  {
40      Base::finishCreation(vm, 0, "WeakSet"_s, PropertyAdditionMode::WithoutStructureTransition);
41      putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
42  }
43  
44  static JSC_DECLARE_HOST_FUNCTION(callWeakSet);
45  static JSC_DECLARE_HOST_FUNCTION(constructWeakSet);
46  
47  WeakSetConstructor::WeakSetConstructor(VM& vm, Structure* structure)
48      : Base(vm, structure, callWeakSet, constructWeakSet)
49  {
50  }
51  
52  JSC_DEFINE_HOST_FUNCTION(callWeakSet, (JSGlobalObject* globalObject, CallFrame*))
53  {
54      VM& vm = globalObject->vm();
55      auto scope = DECLARE_THROW_SCOPE(vm);
56      return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(globalObject, scope, "WeakSet"));
57  }
58  
59  JSC_DEFINE_HOST_FUNCTION(constructWeakSet, (JSGlobalObject* globalObject, CallFrame* callFrame))
60  {
61      VM& vm = globalObject->vm();
62      auto scope = DECLARE_THROW_SCOPE(vm);
63  
64      JSObject* newTarget = asObject(callFrame->newTarget());
65      Structure* weakSetStructure = newTarget == callFrame->jsCallee()
66          ? globalObject->weakSetStructure()
67          : InternalFunction::createSubclassStructure(globalObject, newTarget, getFunctionRealm(vm, newTarget)->weakSetStructure());
68      RETURN_IF_EXCEPTION(scope, { });
69  
70      JSWeakSet* weakSet = JSWeakSet::create(vm, weakSetStructure);
71      JSValue iterable = callFrame->argument(0);
72      if (iterable.isUndefinedOrNull())
73          return JSValue::encode(weakSet);
74  
75      JSValue adderFunction = weakSet->JSObject::get(globalObject, vm.propertyNames->add);
76      RETURN_IF_EXCEPTION(scope, encodedJSValue());
77  
78      auto adderFunctionCallData = getCallData(vm, adderFunction);
79      if (adderFunctionCallData.type == CallData::Type::None)
80          return JSValue::encode(throwTypeError(globalObject, scope));
81  
82      scope.release();
83      forEachInIterable(globalObject, iterable, [&](VM&, JSGlobalObject* globalObject, JSValue nextValue) {
84          MarkedArgumentBuffer arguments;
85          arguments.append(nextValue);
86          ASSERT(!arguments.hasOverflowed());
87          call(globalObject, adderFunction, adderFunctionCallData, weakSet, arguments);
88      });
89  
90      return JSValue::encode(weakSet);
91  }
92  
93  }