1  /*
 2   * Copyright (C) 2013, 2016 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   *
 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 AND ITS CONTRIBUTORS "AS IS" AND ANY
15   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
16   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
17   * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
18   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
19   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
20   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
21   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24   */
25  
26  #include "config.h"
27  #include "DataView.h"
28  
29  #include "HeapInlines.h"
30  #include "JSDataView.h"
31  #include "JSGlobalObject.h"
32  
33  namespace JSC {
34  
35  DataView::DataView(RefPtr<ArrayBuffer>&& buffer, unsigned byteOffset, unsigned byteLength)
36      : ArrayBufferView(WTFMove(buffer), byteOffset, byteLength)
37  {
38  }
39  
40  Ref<DataView> DataView::create(
41      RefPtr<ArrayBuffer>&& buffer, unsigned byteOffset, unsigned byteLength)
42  {
43      return adoptRef(*new DataView(WTFMove(buffer), byteOffset, byteLength));
44  }
45  
46  Ref<DataView> DataView::create(RefPtr<ArrayBuffer>&& buffer)
47  {
48      unsigned byteLength = buffer->byteLength();
49      return create(WTFMove(buffer), 0, byteLength);
50  }
51  
52  JSArrayBufferView* DataView::wrap(JSGlobalObject* lexicalGlobalObject, JSGlobalObject* globalObject)
53  {
54      return JSDataView::create(
55          lexicalGlobalObject, globalObject->typedArrayStructure(TypeDataView), possiblySharedBuffer(), byteOffset(),
56          byteLength());
57  }
58  
59  } // namespace JSC
60