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/*
* Copyright (C) 2009 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(3D_CANVAS)
#include "ArrayBufferView.h"
#include "ArrayBuffer.h"
namespace WebCore {
ArrayBufferView::ArrayBufferView(PassRefPtr<ArrayBuffer> buffer,
unsigned byteOffset)
: m_byteOffset(byteOffset)
, m_buffer(buffer)
{
m_baseAddress = m_buffer ? (static_cast<char*>(m_buffer->data()) + m_byteOffset) : 0;
}
ArrayBufferView::~ArrayBufferView()
{
}
void ArrayBufferView::setImpl(ArrayBufferView* array, unsigned byteOffset, ExceptionCode& ec)
{
if (byteOffset > byteLength()
|| byteOffset + array->byteLength() > byteLength()
|| byteOffset + array->byteLength() < byteOffset) {
// Out of range offset or overflow
ec = INDEX_SIZE_ERR;
return;
}
char* base = static_cast<char*>(baseAddress());
memmove(base + byteOffset, array->baseAddress(), array->byteLength());
}
void ArrayBufferView::setRangeImpl(const char* data, size_t dataByteLength, unsigned byteOffset, ExceptionCode& ec)
{
if (byteOffset > byteLength()
|| byteOffset + dataByteLength > byteLength()
|| byteOffset + dataByteLength < byteOffset) {
// Out of range offset or overflow
ec = INDEX_SIZE_ERR;
return;
}
char* base = static_cast<char*>(baseAddress());
memmove(base + byteOffset, data, dataByteLength);
}
void ArrayBufferView::zeroRangeImpl(unsigned byteOffset, size_t rangeByteLength, ExceptionCode& ec)
{
if (byteOffset > byteLength()
|| byteOffset + rangeByteLength > byteLength()
|| byteOffset + rangeByteLength < byteOffset) {
// Out of range offset or overflow
ec = INDEX_SIZE_ERR;
return;
}
char* base = static_cast<char*>(baseAddress());
memset(base + byteOffset, 0, rangeByteLength);
}
void ArrayBufferView::calculateOffsetAndLength(int start, int end, unsigned arraySize,
unsigned* offset, unsigned* length)
{
if (start < 0)
start += arraySize;
if (start < 0)
start = 0;
if (end < 0)
end += arraySize;
if (end < 0)
end = 0;
if (end < start)
end = start;
*offset = static_cast<unsigned>(start);
*length = static_cast<unsigned>(end - start);
}
}
#endif // ENABLE(3D_CANVAS)
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