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96 lines
2.6 KiB
C
96 lines
2.6 KiB
C
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/*
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* Tiny Vector Matrix Library
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* Dense Vector Matrix Libary of Tiny size using Expression Templates
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*
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* Copyright (C) 2001 - 2003 Olaf Petzold <opetzold@users.sourceforge.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* lesser General Public License for more details.
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*
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* You should have received a copy of the GNU lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: MatrixRow.h,v 1.14 2004/09/16 09:14:18 opetzold Exp $
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*/
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#ifndef TVMET_XPR_MATRIX_ROW_H
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#define TVMET_XPR_MATRIX_ROW_H
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namespace tvmet {
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/**
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* \class XprMatrixRow MatrixRow.h "tvmet/xpr/MatrixRow.h"
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* \brief Expression on matrix used for access on the row vector.
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*/
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template<class E, std::size_t Rows, std::size_t Cols>
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class XprMatrixRow
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: public TvmetBase< XprMatrixRow<E, Rows, Cols> >
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{
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XprMatrixRow();
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XprMatrixRow& operator=(const XprMatrixRow&);
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public:
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typedef typename E::value_type value_type;
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public:
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/** Complexity counter. */
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enum {
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ops_expr = E::ops,
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ops = ops_expr/Rows // equal Col accesses
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};
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public:
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/** Constructor. */
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explicit XprMatrixRow(const E& e, std::size_t no)
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: m_expr(e), m_row(no)
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{
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TVMET_RT_CONDITION(no < Rows, "XprMatrixRow Bounce Violation")
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}
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/** Copy Constructor. Not explicit! */
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#if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
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XprMatrixRow(const XprMatrixRow& rhs)
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: m_expr(rhs.m_expr), m_row(rhs.m_row)
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{ }
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#endif
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value_type operator()(std::size_t j) const {
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TVMET_RT_CONDITION(j < Cols, "XprMatrixRow Bounce Violation")
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return m_expr(m_row, j);
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}
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public: // debugging Xpr parse tree
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void print_xpr(std::ostream& os, std::size_t l=0) const {
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os << IndentLevel(l++)
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<< "XprMatrixRow[O=" << ops << ", (O=" << ops_expr << ")]<"
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<< std::endl;
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m_expr.print_xpr(os, l);
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os << IndentLevel(l)
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<< "R=" << Rows << ", C=" << Cols << std::endl
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<< IndentLevel(--l) << ">"
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<< ((l != 0) ? "," : "") << std::endl;
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}
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private:
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const E m_expr;
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const std::size_t m_row;
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};
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}
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#endif // TVMET_XPR_MATRIX_ROW_H
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// Local Variables:
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// mode:C++
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// End:
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