third_party/WebKit/Source/core/typed_arrays/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 "base/macros.h"
#include "core/CoreExport.h"
#include "core/typed_arrays/FlexibleArrayBufferView.h"

namespace blink {

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

 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);
  }

 private:
  DISALLOW_COPY_AND_ASSIGN(TypedFlexibleArrayBufferView);
};

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

}  // namespace blink

#endif  // TypedFlexibleArrayBufferView_h