STK_TransposeAccessor.h

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/*--------------------------------------------------------------------*/
/*     Copyright (C) 2004-2016  Serge Iovleff, Université Lille 1, Inria
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
    License along with this program; if not, write to the
    Free Software Foundation, Inc.,
    59 Temple Place,
    Suite 330,
    Boston, MA 02111-1307
    USA
 
    Contact : S..._Dot_I..._At_stkpp_Dot_org (see copyright for ...)
*/
 
/*
 * Project:  stkpp::Arrays
 * created on: 17 oct. 2012
 * Author:   iovleff, S..._Dot_I..._At_stkpp_Dot_org (see copyright for ...)
 **/
 
#ifndef STK_TRANSPOSEACCESSOR_H
#define STK_TRANSPOSEACCESSOR_H
 
namespace STK
{
 
// forward declaration
template< typename Array> class TransposeAccessor;
 
namespace hidden
{
template<typename Lhs>
struct Traits< TransposeAccessor<Lhs> >
{
  enum
  {
    structure_ = TransposeTraits<Lhs::structure_>::structure_,
    orient_    = !Lhs::orient_,
    sizeRows_  = Lhs::sizeCols_,
    sizeCols_  = Lhs::sizeRows_,
    storage_   = Lhs::storage_
  };
  typedef RowOperator<TransposeAccessor < Lhs> > Row;
  typedef ColOperator<TransposeAccessor < Lhs> > Col;
  typedef typename Lhs::Type Type;
  typedef typename Lhs::TypeConst TypeConst;
};
 
} // end namespace hidden
 
 
template< typename Lhs>
class TransposeAccessor: public ArrayBase< TransposeAccessor<Lhs> >, public TRef<1>
{
  public:
    typedef ArrayBase< TransposeAccessor<Lhs> > Base;
    typedef typename hidden::Traits< TransposeOperator<Lhs> >::Type Type;
    typedef typename hidden::Traits< TransposeOperator<Lhs> >::TypeConst TypeConst;
 
    enum
    {
        structure_ = hidden::Traits< TransposeOperator<Lhs> >::structure_,
        orient_    = hidden::Traits< TransposeOperator<Lhs> >::orient_,
        sizeRows_  = hidden::Traits< TransposeOperator<Lhs> >::sizeRows_,
        sizeCols_  = hidden::Traits< TransposeOperator<Lhs> >::sizeCols_,
        storage_   = hidden::Traits< TransposeOperator<Lhs> >::storage_
    };
    typedef TRange<sizeRows_> RowRange;
    typedef TRange<sizeCols_> ColRange;
    inline TransposeAccessor( Lhs& lhs): Base(), lhs_(lhs) {}
 
    inline RowRange const& rowsImpl() const { return lhs_.cols();}
    inline ColRange const& colsImpl() const { return lhs_.rows();}
 
    inline Lhs const& lhs() const { return lhs_; }
 
    inline TypeConst elt2Impl(int i, int j) const { return lhs_.elt(j, i);}
    inline TypeConst elt1Impl(int i) const { return lhs_.elt(i);}
    inline TypeConst elt0Impl() const { return lhs_.elt();}
    inline Type& elt2Impl(int i, int j) { return lhs_.elt(j, i);}
    inline Type& elt1Impl(int i) { return lhs_.elt(i);}
    inline Type& elt0Impl() { return lhs_.elt();}
 
  protected:
    Lhs& lhs_;
};
 
} // namespace STK
 
#endif /* STK_TRANSPOSEACCESSOR_H */