ArrayView.h - mozsearch

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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef MOZILLA_GFX_ARRAY_VIEW_H_

#define MOZILLA_GFX_ARRAY_VIEW_H_

#include "nsTArray.h"

/* This is similar to mfbt/Range.h but has implicit conversion

 * from nsTArray and less bounds checking.

 * For now, prefer Range over ArrayView */

namespace mozilla {

namespace gfx {

template <typename T>

class ArrayView {

 public:

  MOZ_IMPLICIT ArrayView(const nsTArray<T>& aData)

      : mData(aData.Elements()), mLength(aData.Length()) {}

  ArrayView(const T* aData, const size_t aLength)

      : mData(aData), mLength(aLength) {}

  const T& operator[](const size_t aIdx) const { return mData[aIdx]; }

  size_t Length() const { return mLength; }

  const T* Data() const { return mData; }

 private:

  const T* mData;

  const size_t mLength;

};

}  // namespace gfx

}  // namespace mozilla

#endif /* MOZILLA_GFX_ARRAY_VIEW_H_ */