third_party/WebKit/Source/core/dom/TypedFlexibleArrayBufferView.h

// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef TypedFlexibleArrayBufferView_h
#define TypedFlexibleArrayBufferView_h

#include "core/CoreExport.h"
#include "core/dom/FlexibleArrayBufferView.h"
#include "wtf/Noncopyable.h"

namespace blink {

template<typename WTFTypedArray>
class CORE_TEMPLATE_CLASS_EXPORT TypedFlexibleArrayBufferView final : public FlexibleArrayBufferView {
    STACK_ALLOCATED();
    WTF_MAKE_NONCOPYABLE(TypedFlexibleArrayBufferView);
public:
    using ValueType = typename WTFTypedArray::ValueType;

    TypedFlexibleArrayBufferView() : FlexibleArrayBufferView() {}

    ValueType* dataMaybeOnStack() const { return static_cast<ValueType*>(baseAddressMaybeOnStack()); }

    unsigned length() const
    {
        DCHECK_EQ(byteLength() % sizeof(ValueType), 0u);
        return byteLength() / sizeof(ValueType);
    }
};

using FlexibleFloat32ArrayView = TypedFlexibleArrayBufferView<WTF::Float32Array>;
using FlexibleInt32ArrayView = TypedFlexibleArrayBufferView<WTF::Int32Array>;
using FlexibleUint32ArrayView = TypedFlexibleArrayBufferView<WTF::Uint32Array>;

} // namespace blink

#endif // TypedFlexibleArrayBufferView_h