Merge.h

/*
 * Expression Template Matrix Library
 *
 * Copyright (C) 2004 - 2006 Ricky Lung <mtlung@users.sourceforge.net>
 *
 * This library 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 2.1 of the License, or (at your option) any later version.
 *
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */


// Forward declaration
template<class Rep1, class Rep2> class ConstHMergeView;

template<class Rep1, class Rep2>
class HMergeView : public HMergeViewTag
{
public:
    typedef HMergeView<Rep1, Rep2>      self_type;
    typedef HMergeViewTag               exp_tag;
    typedef NullTag                     extra_param_type;
    typedef ConstHMergeView<Rep1, Rep2> const_view_type;

    typedef self_type                               rep_type;
    typedef self_type                               super_type;
    typedef ExpRow<self_type>                       row_type;
    typedef const ExpRow<self_type>                 const_row_type;
    typedef typename Rep1::col_type                 col_type;
    typedef HEleType(typename Rep1::value_type, typename Rep2::value_type)  value_type;
    typedef typename Rep1::index_type               index_type;
    typedef typename Loki::TypeTraits<value_type>::ParameterType param_type;
    typedef typename Loki::TypeTraits<const value_type>::ParameterType const_param_type;
    typedef mat_iterator<self_type>                 iterator;
    typedef const_mat_iterator<self_type>           const_iterator;
    typedef typename Rep1::rep_type                 left_type;
    typedef typename Rep2::rep_type                 right_type;
    typedef typename BinViewValueTypeChooser<left_type,
        right_type,value_type>::RET                 reference;
    typedef typename BinViewValueTypeChooser<left_type,
        right_type,const value_type>::RET           const_reference;
    left_type&                                      leftOp;
    right_type&                                     rightOp;


    EXMAT_INLINE2 iterator begin()
    {   return iterator(*this, 0, 0);   }
    EXMAT_INLINE2 const_iterator begin() const
    {   return const_iterator(*this, 0, 0); }
    EXMAT_INLINE2 iterator end()
    {   return iterator(*this, rows(), 0);  }
    EXMAT_INLINE2 const_iterator end() const
    {   return const_iterator(*this, rows(), 0);    }


    enum {
        ROWS = (int(Rep1::ROWS) == 0) ? int(Rep2::ROWS) : int(Rep1::ROWS),
        COLS = (int(Rep1::COLS) == 0 || int(Rep2::COLS) == 0) ? 0 : int(Rep1::COLS+Rep2::COLS),
        IsLinear = true,
        IsLinearRecursive = IsLinear && (bool(Rep1::IsLinearRecursive) && bool(Rep2::IsLinearRecursive)),
        TNOP = 0,
        ENOP = 0,
        EXPLevel = (int(Rep1::EXPLevel) > int(Rep2::EXPLevel)) ? int(Rep1::EXPLevel + 1) : int(Rep2::EXPLevel + 1)
    };

    typedef Mat<DenseMatCon<value_type,ROWS,COLS>, EmptyErrorChecker> temp_type;

    /************************************************/
    // Constructors
    EXMAT_INLINE2 HMergeView(const self_type& self)
        : leftOp(self.leftOp), rightOp(self.rightOp) {}
    EXMAT_INLINE2 HMergeView(left_type& mat1, right_type& mat2)
        : leftOp(mat1), rightOp(mat2) {}
    template<class Rep3> EXMAT_INLINE2
    HMergeView(const Rep3& self, left_type& mat1, right_type& mat2)
        : leftOp(mat1), rightOp(mat2) {}

    EXMAT_INLINE2 self_type operator=(const_param_type s) {
        leftOp = rightOp = s;
        return *this;
    }
    /************************************************/
    // Dimension information
    EXMAT_INLINE2 size_t size() const { return leftOp.size() + rightOp.size(); }
    EXMAT_INLINE2 size_t rows() const {
        return (left_type::ROWS == 0) ? rightOp.rows() : leftOp.rows();
    }
    EXMAT_INLINE2 size_t cols() const { return leftOp.cols() + rightOp.cols(); }
    /************************************************/
    // Index function (for internal use, no error checking applied)
    EXMAT_INLINE2 reference setAt(index_type i) {
        return this->setAt(i/this->cols(), i%this->cols());
    }
    EXMAT_INLINE2 const_reference getAt(index_type i) {
        return this->getAt(i/this->cols(), i%this->cols());
    }
    EXMAT_INLINE2 reference setAt(index_type i, index_type j) {
        if(j < leftOp.cols())
            return leftOp.setAt(i, j);
        else
            return rightOp.setAt(i, j-leftOp.cols());
    }
    EXMAT_INLINE2 const_reference getAt(index_type i, index_type j) const {
        if(j < leftOp.cols())
            return leftOp.getAt(i, j);
        else
            return rightOp.getAt(i, j-leftOp.cols());
    }
};
template<class Rep1, class ErrChk1, class Rep2, class ErrChk2> EXMAT_INLINE2 static
Mat<ExpMat<HMergeView<typename Rep1::rep_type, typename Rep2::rep_type> >, DefaultErrorChecker>
hMerge(Mat<Rep1, ErrChk1>& mat1, Mat<Rep2, ErrChk2>& mat2) {
    return ExpMat<HMergeView<TTYPENAME Rep1::rep_type, TTYPENAME Rep2::rep_type> >(mat1, mat2);
}


template<class Rep1, class Rep2>
class ConstHMergeView : public HMergeViewTag
{
public:
    typedef ConstHMergeView<Rep1, Rep2> self_type;
    typedef HMergeViewTag               exp_tag;
    typedef NullTag                     extra_param_type;
    typedef self_type                   const_view_type;

    typedef self_type                               rep_type;
    typedef self_type                               super_type;
    typedef const ExpRow<self_type>                 row_type;
    typedef const ExpRow<self_type>                 const_row_type;
    typedef typename Rep1::col_type                 col_type;
    typedef HEleType(typename Rep1::value_type, typename Rep2::value_type)  value_type;
    typedef typename Rep1::index_type               index_type;
    typedef typename Loki::TypeTraits<value_type>::ParameterType param_type;
    typedef typename Loki::TypeTraits<const value_type>::ParameterType const_param_type;
    typedef const_mat_iterator<self_type>           iterator;
    typedef const_mat_iterator<self_type>           const_iterator;
    typedef typename Rep1::rep_type                 left_type;
    typedef typename Rep2::rep_type                 right_type;
    typedef typename BinViewValueTypeChooser<left_type,
        right_type,const value_type>::RET           reference;
    typedef reference                               const_reference;
    typename OperandTypeChooser<left_type>::RET     leftOp;
    typename OperandTypeChooser<right_type>::RET    rightOp;


    EXMAT_INLINE2 const_iterator begin() const
    {   return const_iterator(*this, 0, 0); }
    EXMAT_INLINE2 const_iterator end() const
    {   return const_iterator(*this, rows(), 0);    }


    enum {
        ROWS = (int(Rep1::ROWS) == 0) ? int(Rep2::ROWS) : int(Rep1::ROWS),
        COLS = (int(Rep1::COLS) == 0 || int(Rep2::COLS) == 0) ? 0 : int(Rep1::COLS+Rep2::COLS),
        IsLinear = true,
        IsLinearRecursive = IsLinear && (bool(Rep1::IsLinearRecursive) && bool(Rep2::IsLinearRecursive)),
        TNOP = 0,
        ENOP = 0,
        EXPLevel = (int(Rep1::EXPLevel) > int(Rep2::EXPLevel)) ? int(Rep1::EXPLevel + 1) : int(Rep2::EXPLevel + 1)
    };

    typedef Mat<DenseMatCon<value_type,ROWS,COLS>, EmptyErrorChecker> temp_type;

    /************************************************/
    // Constructors
    EXMAT_INLINE2 ConstHMergeView(const self_type& self)
        : leftOp(self.leftOp), rightOp(self.rightOp) {}
    EXMAT_INLINE2 ConstHMergeView(const left_type& mat1, const right_type& mat2)
        : leftOp(mat1), rightOp(mat2) {}
    template<class Rep3> EXMAT_INLINE2
    ConstHMergeView(const Rep3& self, const left_type& mat1, const right_type& mat2)
        : leftOp(mat1), rightOp(mat2) {}

    /************************************************/
    // Dimension information
    EXMAT_INLINE2 size_t size() const { return leftOp.size() + rightOp.size(); }
    EXMAT_INLINE2 size_t rows() const {
        return (left_type::ROWS == 0) ? rightOp.rows() : leftOp.rows();
    }
    EXMAT_INLINE2 size_t cols() const { return leftOp.cols() + rightOp.cols(); }
    /************************************************/
    // Index function (for internal use, no error checking applied)
    EXMAT_INLINE2 const_reference getAt(index_type i) {
        return this->getAt(i/this->cols(), i%this->cols());
    }
    EXMAT_INLINE2 const_reference getAt(index_type i, index_type j) const {
        if(j < leftOp.cols())
            return leftOp.getAt(i, j);
        else
            return rightOp.getAt(i, j-leftOp.cols());
    }
};
template<class Rep1, class ErrChk1, class Rep2, class ErrChk2> EXMAT_INLINE2 static
const Mat<ExpMat<ConstHMergeView<typename Rep1::rep_type, typename Rep2::rep_type> >, DefaultErrorChecker>
hMerge(const Mat<Rep1, ErrChk1>& mat1, const Mat<Rep2, ErrChk2>& mat2) {
    return ExpMat<ConstHMergeView<TTYPENAME Rep1::rep_type, TTYPENAME Rep2::rep_type> >(mat1, mat2);
}

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