1  /*
 2   * Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>.
 3   * Copyright (C) 2016-2019 Apple Inc. All Rights Reserved.
 4   *
 5   * Redistribution and use in source and binary forms, with or without
 6   * modification, are permitted provided that the following conditions
 7   * are met:
 8   * 1. Redistributions of source code must retain the above copyright
 9   *    notice, this list of conditions and the following disclaimer.
10   * 2. Redistributions in binary form must reproduce the above copyright
11   *    notice, this list of conditions and the following disclaimer in the
12   *    documentation and/or other materials provided with the distribution.
13   *
14   * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
15   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
16   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
18   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
20   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
22   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
23   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
24   * THE POSSIBILITY OF SUCH DAMAGE.
25   */
26  
27  #include "config.h"
28  #include "JSTemplateObjectDescriptor.h"
29  
30  #include "JSCInlines.h"
31  #include "ObjectConstructor.h"
32  #include "VM.h"
33  
34  namespace JSC {
35  
36  const ClassInfo JSTemplateObjectDescriptor::s_info = { "TemplateObjectDescriptor", nullptr, nullptr, nullptr, CREATE_METHOD_TABLE(JSTemplateObjectDescriptor) };
37  
38  
39  JSTemplateObjectDescriptor::JSTemplateObjectDescriptor(VM& vm, Ref<TemplateObjectDescriptor>&& descriptor, int endOffset)
40      : Base(vm, vm.templateObjectDescriptorStructure.get())
41      , m_descriptor(WTFMove(descriptor))
42      , m_endOffset(endOffset)
43  {
44  }
45  
46  JSTemplateObjectDescriptor* JSTemplateObjectDescriptor::create(VM& vm, Ref<TemplateObjectDescriptor>&& descriptor, int endOffset)
47  {
48      JSTemplateObjectDescriptor* result = new (NotNull, allocateCell<JSTemplateObjectDescriptor>(vm.heap)) JSTemplateObjectDescriptor(vm, WTFMove(descriptor), endOffset);
49      result->finishCreation(vm);
50      return result;
51  }
52  
53  void JSTemplateObjectDescriptor::destroy(JSCell* cell)
54  {
55      static_cast<JSTemplateObjectDescriptor*>(cell)->JSTemplateObjectDescriptor::~JSTemplateObjectDescriptor();
56  }
57  
58  JSArray* JSTemplateObjectDescriptor::createTemplateObject(JSGlobalObject* globalObject)
59  {
60      VM& vm = globalObject->vm();
61      auto scope = DECLARE_THROW_SCOPE(vm);
62      unsigned count = descriptor().cookedStrings().size();
63      JSArray* templateObject = constructEmptyArray(globalObject, nullptr, count);
64      RETURN_IF_EXCEPTION(scope, nullptr);
65      JSArray* rawObject = constructEmptyArray(globalObject, nullptr, count);
66      RETURN_IF_EXCEPTION(scope, nullptr);
67  
68      for (unsigned index = 0; index < count; ++index) {
69          auto cooked = descriptor().cookedStrings()[index];
70          if (cooked)
71              templateObject->putDirectIndex(globalObject, index, jsString(vm, cooked.value()), PropertyAttribute::ReadOnly | PropertyAttribute::DontDelete, PutDirectIndexLikePutDirect);
72          else
73              templateObject->putDirectIndex(globalObject, index, jsUndefined(), PropertyAttribute::ReadOnly | PropertyAttribute::DontDelete, PutDirectIndexLikePutDirect);
74          RETURN_IF_EXCEPTION(scope, nullptr);
75  
76          rawObject->putDirectIndex(globalObject, index, jsString(vm, descriptor().rawStrings()[index]), PropertyAttribute::ReadOnly | PropertyAttribute::DontDelete, PutDirectIndexLikePutDirect);
77          RETURN_IF_EXCEPTION(scope, nullptr);
78      }
79  
80      objectConstructorFreeze(globalObject, rawObject);
81      scope.assertNoException();
82  
83      templateObject->putDirect(vm, vm.propertyNames->raw, rawObject, PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum | PropertyAttribute::DontDelete);
84  
85      objectConstructorFreeze(globalObject, templateObject);
86      scope.assertNoException();
87  
88      return templateObject;
89  }
90  
91  } // namespace JSC