2 * Copyright (C) 2010 Apple Inc. All rights reserved.
3 * Copyright (c) 2010, Google Inc. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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27 #ifndef TypedArrayBase_h
28 #define TypedArrayBase_h
30 #include "ArrayBuffer.h"
31 #include "ArrayBufferView.h"
36 class TypedArrayBase : public ArrayBufferView {
38 T* data() const { return static_cast<T*>(baseAddress()); }
40 void set(TypedArrayBase<T>* array, unsigned offset, ExceptionCode& ec)
42 setImpl(array, offset * sizeof(T), ec);
45 void setRange(const T* data, size_t dataLength, unsigned offset, ExceptionCode& ec)
47 setRangeImpl(reinterpret_cast<const char*>(data), dataLength * sizeof(T), offset * sizeof(T), ec);
50 void zeroRange(unsigned offset, size_t length, ExceptionCode& ec)
52 zeroRangeImpl(offset * sizeof(T), length * sizeof(T), ec);
55 // Overridden from ArrayBufferView. This must be public because of
56 // rules about inheritance of members in template classes, and
57 // because it is accessed via pointers to subclasses.
58 unsigned length() const
63 virtual unsigned byteLength() const
65 return m_length * sizeof(T);
69 TypedArrayBase(PassRefPtr<ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
70 : ArrayBufferView(buffer, byteOffset)
75 template <class Subclass>
76 static PassRefPtr<Subclass> create(unsigned length)
78 RefPtr<ArrayBuffer> buffer = ArrayBuffer::create(length, sizeof(T));
81 return create<Subclass>(buffer, 0, length);
84 template <class Subclass>
85 static PassRefPtr<Subclass> create(const T* array, unsigned length)
87 RefPtr<Subclass> a = create<Subclass>(length);
89 for (unsigned i = 0; i < length; ++i)
94 template <class Subclass>
95 static PassRefPtr<Subclass> create(PassRefPtr<ArrayBuffer> buffer,
99 RefPtr<ArrayBuffer> buf(buffer);
100 if (!verifySubRange<T>(buf, byteOffset, length))
103 return adoptRef(new Subclass(buf, byteOffset, length));
106 template <class Subclass>
107 PassRefPtr<Subclass> subarrayImpl(int start, int end) const
109 unsigned offset, length;
110 calculateOffsetAndLength(start, end, m_length, &offset, &length);
111 clampOffsetAndNumElements<T>(buffer(), m_byteOffset, &offset, &length);
112 return create<Subclass>(buffer(), offset, length);
115 // We do not want to have to access this via a virtual function in subclasses,
116 // which is why it is protected rather than private.
120 } // namespace WebCore
122 #endif // TypedArrayBase_h