2 * Copyright (C) 2009 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, 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 COMPUTER, 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
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23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "ArrayBuffer.h"
29 #include <wtf/RefPtr.h>
33 PassRefPtr<ArrayBuffer> ArrayBuffer::create(unsigned numElements, unsigned elementByteSize)
35 void* data = tryAllocate(numElements, elementByteSize);
38 return adoptRef(new ArrayBuffer(data, numElements * elementByteSize));
41 PassRefPtr<ArrayBuffer> ArrayBuffer::create(ArrayBuffer* other)
43 return ArrayBuffer::create(other->data(), other->byteLength());
46 PassRefPtr<ArrayBuffer> ArrayBuffer::create(const void* source, unsigned byteLength)
48 void* data = tryAllocate(byteLength, 1);
51 RefPtr<ArrayBuffer> buffer = adoptRef(new ArrayBuffer(data, byteLength));
52 memcpy(buffer->data(), source, byteLength);
53 return buffer.release();
56 ArrayBuffer::ArrayBuffer(void* data, unsigned sizeInBytes)
57 : m_sizeInBytes(sizeInBytes)
62 void* ArrayBuffer::data()
67 const void* ArrayBuffer::data() const
72 unsigned ArrayBuffer::byteLength() const
77 ArrayBuffer::~ArrayBuffer()
79 WTF::fastFree(m_data);
82 void* ArrayBuffer::tryAllocate(unsigned numElements, unsigned elementByteSize)
85 // Do not allow 32-bit overflow of the total size.
86 // FIXME: Why not? The tryFastCalloc function already checks its arguments,
87 // and will fail if there is any overflow, so why should we include a
88 // redudant unnecessarily restrictive check here?
90 unsigned totalSize = numElements * elementByteSize;
91 if (totalSize / numElements != elementByteSize)
94 if (WTF::tryFastCalloc(numElements, elementByteSize).getValue(result))