1  /*
 2   * Copyright (C) 2013-2017 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 "JSMapIterator.h"
28  
29  #include "JSCInlines.h"
30  #include "JSInternalFieldObjectImplInlines.h"
31  #include "JSMap.h"
32  
33  namespace JSC {
34  
35  const ClassInfo JSMapIterator::s_info = { "Map Iterator", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSMapIterator) };
36  
37  JSMapIterator* JSMapIterator::createWithInitialValues(VM& vm, Structure* structure)
38  {
39      JSMapIterator* iterator = new (NotNull, allocateCell<JSMapIterator>(vm.heap)) JSMapIterator(vm, structure);
40      iterator->finishCreation(vm);
41      return iterator;
42  }
43  
44  void JSMapIterator::finishCreation(VM& vm, JSMap* iteratedObject, IterationKind kind)
45  {
46      Base::finishCreation(vm);
47      internalField(Field::MapBucket).set(vm, this, iteratedObject->head());
48      internalField(Field::IteratedObject).set(vm, this, iteratedObject);
49      internalField(Field::Kind).set(vm, this, jsNumber(static_cast<int32_t>(kind)));
50  }
51  
52  void JSMapIterator::finishCreation(VM& vm)
53  {
54      Base::finishCreation(vm);
55      auto values = initialValues();
56      for (unsigned index = 0; index < values.size(); ++index)
57          Base::internalField(index).set(vm, this, values[index]);
58  }
59  
60  void JSMapIterator::visitChildren(JSCell* cell, SlotVisitor& visitor)
61  {
62      auto* thisObject = jsCast<JSMapIterator*>(cell);
63      ASSERT_GC_OBJECT_INHERITS(thisObject, info());
64      Base::visitChildren(thisObject, visitor);
65  }
66  
67  JSValue JSMapIterator::createPair(JSGlobalObject* globalObject, JSValue key, JSValue value)
68  {
69      MarkedArgumentBuffer args;
70      args.append(key);
71      args.append(value);
72      ASSERT(!args.hasOverflowed());
73      return constructArray(globalObject, static_cast<ArrayAllocationProfile*>(nullptr), args);
74  }
75  
76  }