Transpose.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 Rep> class ConstTransView;

template<class Rep>
class TransView : public TransposeViewTag
{
public:
    typedef TransView<Rep>      self_type;
    typedef TransposeViewTag    exp_tag;
    typedef NullTag             extra_param_type;
    typedef ConstTransView<Rep> const_view_type;
    COMMON_VIEW_TYPEDEFS();

    enum {
        ROWS = super_type::COLS,
        COLS = super_type::ROWS,
        IsLinear = false,
        IsLinearRecursive = IsLinear && super_type::IsLinearRecursive,
        TNOP = Rep::TNOP,
        ENOP = Rep::ENOP,
        EXPLevel = Rep::EXPLevel + 1
    };

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

    /************************************************/
    // Constructors
    EXMAT_INLINE2 TransView(const self_type& self)
        : rep(self.rep) {}
    EXMAT_INLINE2 TransView(super_type& mat)
        : rep(mat) {}
    template<class Rep2> EXMAT_INLINE2
    TransView(const Rep2& self, super_type& mat)
        : rep(mat) {}

    EXMAT_INLINE2 self_type operator=(const_param_type s) {
        rep = s;
        return *this;
    }
    /************************************************/
    // Dimension information
    EXMAT_INLINE2 size_t size() const { return rep.size(); }
    EXMAT_INLINE2 size_t rows() const { return rep.cols(); }
    EXMAT_INLINE2 size_t cols() const { return rep.rows(); }
    /************************************************/
    // Index function (for internal use, no error checking applied)
    EXMAT_INLINE2 reference setAt(index_type i) {
        if(ROWS == 1 || COLS == 1)
            return rep.setAt(i);
        else
            return rep.setAt(i%rep.cols(), i/rep.cols());
    }
    EXMAT_INLINE2 const_reference getAt(index_type i) const {
        if(ROWS == 1 || COLS == 1)
            return rep.getAt(i);
        else
            return rep.getAt(i%rep.cols(), i/rep.cols());
    }
    EXMAT_INLINE2 reference setAt(index_type i, index_type j)
    {   return rep.setAt(j, i); }
    EXMAT_INLINE2 const_reference getAt(index_type i, index_type j) const
    {   return rep.getAt(j, i); }
};
template<class Rep, class ErrChk> EXMAT_INLINE2 static
Mat<ExpMat<TransView<typename Rep::rep_type> >, ErrChk>
trans(Mat<Rep, ErrChk>& mat) {
    return ExpMat<TransView<TTYPENAME Rep::rep_type> >(mat);
}
template<class Rep, class ErrChk> EXMAT_INLINE2 static
Vec<ExpMat<TransView<typename Rep::rep_type> >, ErrChk>
trans(Vec<Rep, ErrChk>& vec) {
    return ExpMat<TransView<TTYPENAME Rep::rep_type> >(vec);
}
#if HAVE_TT_PARAMETER

template<class Rep, class ErrChk, template<class Rep, class ErrChk> class RepT, template<class RepT> class MathClass > EXMAT_INLINE2
static MathClass<RepT<ExpMat<ConstTransView<Rep> >, ErrChk> >
trans(MathClass<RepT<Rep, ErrChk> >& vec) {
    return MathClass<RepT<ExpMat<ConstTransView<Rep> >, ErrChk> >(ExpMat<ConstTransView<Rep> >(vec));
}
#endif  // HAVE_TT_PARAMETER


template<class Rep>
class ConstTransView : public TransposeViewTag
{
public:
    typedef ConstTransView<Rep> self_type;
    typedef TransposeViewTag        exp_tag;
    typedef NullTag             extra_param_type;
    COMMON_CONST_VIEW_TYPEDEFS();

    enum {
        ROWS = super_type::COLS,
        COLS = super_type::ROWS,
        IsLinear = false,
        IsLinearRecursive = IsLinear && super_type::IsLinearRecursive,
        TNOP = Rep::TNOP,
        ENOP = Rep::ENOP,
        EXPLevel = Rep::EXPLevel +1
    };

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

    /************************************************/
    // Constructors
    EXMAT_INLINE2 ConstTransView(const self_type& self)
        : rep(self.rep) {}
    EXMAT_INLINE2 ConstTransView(const super_type& mat)
        : rep(mat) {}
    template<class Rep2> EXMAT_INLINE2
    ConstTransView(const Rep2& self, const super_type& mat)
        : rep(mat) {}

    /************************************************/
    // Dimension information
    EXMAT_INLINE2 size_t size() const { return rep.size(); }
    EXMAT_INLINE2 size_t rows() const { return rep.cols(); }
    EXMAT_INLINE2 size_t cols() const { return rep.rows(); }
    /************************************************/
    // Index function (for internal use, no error checking applied)
    EXMAT_INLINE2 const_reference getAt(index_type i) const {
        if(ROWS == 1 || COLS == 1)
            return rep.getAt(i);
        else
            return rep.getAt(i%rep.cols(), i/rep.cols());
    }
    EXMAT_INLINE2 const_reference getAt(index_type i, index_type j) const
    {   return rep.getAt(j, i); }
};
template<class Rep, class ErrChk> EXMAT_INLINE2 static
const Mat<ExpMat<ConstTransView<typename Rep::rep_type> >, ErrChk>
trans(const Mat<Rep, ErrChk>& mat) {
    return ExpMat<ConstTransView<TTYPENAME Rep::rep_type> >(mat);
}
template<class Rep, class ErrChk> EXMAT_INLINE2 static
const Vec<ExpMat<ConstTransView<typename Rep::rep_type> >, ErrChk>
trans(const Vec<Rep, ErrChk>& vec) {
    return ExpMat<ConstTransView<TTYPENAME Rep::rep_type> >(vec);
}
#if HAVE_TT_PARAMETER

template<class Rep, class ErrChk, template<class Rep, class ErrChk> class RepT, template<class RepT> class MathClass > EXMAT_INLINE2
static const MathClass<RepT<ExpMat<ConstTransView<Rep> >, ErrChk> >
trans(const MathClass<RepT<Rep, ErrChk> >& vec) {
    return ExpMat<ConstTransView<Rep> >(vec);
}
#endif  // HAVE_TT_PARAMETER

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