Source/JavaScriptCore/runtime/DataView.cpp

/*
 * Copyright (C) 2013, 2016 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 AND ITS CONTRIBUTORS "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 OR ITS 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"
#include "DataView.h"

#include "JSCInlines.h"
#include "JSDataView.h"
#include "JSGlobalObject.h"

namespace JSC {

DataView::DataView(RefPtr<ArrayBuffer>&& buffer, unsigned byteOffset, unsigned byteLength)
    : ArrayBufferView(WTFMove(buffer), byteOffset)
    , m_byteLength(byteLength)
{
}

Ref<DataView> DataView::create(
    RefPtr<ArrayBuffer>&& buffer, unsigned byteOffset, unsigned byteLength)
{
    return adoptRef(*new DataView(WTFMove(buffer), byteOffset, byteLength));
}

Ref<DataView> DataView::create(RefPtr<ArrayBuffer>&& buffer)
{
    unsigned byteLength = buffer->byteLength();
    return create(WTFMove(buffer), 0, byteLength);
}

JSArrayBufferView* DataView::wrap(ExecState* exec, JSGlobalObject* globalObject)
{
    return JSDataView::create(
        exec, globalObject->typedArrayStructure(TypeDataView), possiblySharedBuffer(), byteOffset(),
        byteLength());
}

} // namespace JSC