arrayview.h (flens/storage/array/arrayview.h)

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/*

 *   Copyright (c) 2007, Michael Lehn

 *

 *   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.

 *   3) Neither the name of the FLENS development group nor the names of

 *      its contributors may be used to endorse or promote products derived

 *      from this software without specific prior written permission.

 *

 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT

 *   OWNER 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.

 */

#ifndef FLENS_STORAGE_ARRAY_ARRAYVIEW_H

#define FLENS_STORAGE_ARRAY_ARRAYVIEW_H 1

#include <cxxstd/memory.h>

#include <flens/storage/indexoptions.h>

namespace flens {

template <typename T, typename I, typename A>

    class ConstArrayView;

template <typename T, typename I, typename A>

    class Array;

template <typename T,

          typename I = IndexOptions<>,

          typename A = std::allocator<T> >

class ArrayView

{

    public:

        typedef T                       ElementType;

        typedef typename I::IndexType   IndexType;

        typedef A                       Allocator;

        typedef ConstArrayView<T, I, A> ConstView;

        typedef ArrayView               View;

        typedef Array<T, I, A>          NoView;

        static const IndexType          defaultIndexBase = I::defaultIndexBase;

        ArrayView(IndexType length,

                  ElementType *data,

                  IndexType stride = IndexType(1),

                  IndexType firstIndex = defaultIndexBase,

                  const Allocator &allocator = Allocator());

        ArrayView(const ArrayView &rhs);

        template <typename RHS>

            ArrayView(RHS &rhs);

        ~ArrayView();

        //-- operators ---------------------------------------------------------

        const ElementType &

        operator()(IndexType index) const;

        ElementType &

        operator()(IndexType index);

        //-- methods -----------------------------------------------------------

        IndexType

        firstIndex() const;

        IndexType

        lastIndex() const;

        IndexType

        length() const;

        IndexType

        stride() const;

        const ElementType *

        data() const;

        ElementType *

        data();

        const Allocator &

        allocator() const;

        bool

        resize(IndexType length,

               IndexType firstIndex = defaultIndexBase,

               const ElementType &value = ElementType());

        template <typename ARRAY>

            bool

            resize(const ARRAY &rhs, const ElementType &value = ElementType());

        bool

        fill(const ElementType &value = ElementType(0));

        void

        changeIndexBase(IndexType firstIndex);

        const ConstView

        view(IndexType from, IndexType to,

             IndexType stride = IndexType(1),

             IndexType firstViewIndex =  defaultIndexBase) const;

        ArrayView

        view(IndexType from, IndexType to,

             IndexType stride = IndexType(1),

             IndexType firstViewIndex = defaultIndexBase);

    private:

        ElementType  *data_;

        Allocator    allocator_;

        IndexType    length_, stride_, firstIndex_;

};

//-- ArrayView specific functions ----------------------------------------------

//

//  fillRandom

//

template <typename T, typename I, typename A>

    bool

    fillRandom(ArrayView<T, I, A> &x);

} // namespace flens

#endif // FLENS_STORAGE_ARRAY_ARRAYVIEW_H