| 1 | /*************************************************************************** |
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| 2 | * blitz/matref.h Declaration of the _bz_MatrixRef<P_numtype, P_structure> |
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| 3 | * class. |
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| 4 | * |
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| 5 | * $Id: matref.h,v 1.4 2003/12/11 03:44:22 julianc Exp $ |
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| 6 | * |
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| 7 | * Copyright (C) 1997-2001 Todd Veldhuizen <tveldhui@oonumerics.org> |
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| 8 | * |
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| 9 | * This program is free software; you can redistribute it and/or |
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| 10 | * modify it under the terms of the GNU General Public License |
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| 11 | * as published by the Free Software Foundation; either version 2 |
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| 12 | * of the License, or (at your option) any later version. |
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| 13 | * |
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| 14 | * This program is distributed in the hope that it will be useful, |
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| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 17 | * GNU General Public License for more details. |
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| 18 | * |
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| 19 | * Suggestions: blitz-dev@oonumerics.org |
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| 20 | * Bugs: blitz-bugs@oonumerics.org |
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| 21 | * |
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| 22 | * For more information, please see the Blitz++ Home Page: |
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| 23 | * http://oonumerics.org/blitz/ |
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| 24 | * |
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| 25 | ***************************************************************************/ |
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| 26 | |
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| 27 | #ifndef BZ_MATREF_H |
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| 28 | #define BZ_MATREF_H |
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| 29 | |
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| 30 | #ifndef BZ_MATEXPR_H |
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| 31 | #error <blitz/matref.h> must be included via <blitz/matexpr.h> |
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| 32 | #endif // BZ_MATEXPR_H |
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| 33 | |
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| 34 | BZ_NAMESPACE(blitz) |
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| 35 | |
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| 36 | template<typename P_numtype, typename P_structure> |
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| 37 | class _bz_MatrixRef { |
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| 38 | |
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| 39 | public: |
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| 40 | typedef P_numtype T_numtype; |
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| 41 | |
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| 42 | _bz_MatrixRef(const Matrix<P_numtype, P_structure>& m) |
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| 43 | : matrix_(&m) |
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| 44 | { } |
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| 45 | |
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| 46 | T_numtype operator()(unsigned i, unsigned j) const |
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| 47 | { return (*matrix_)(i,j); } |
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| 48 | |
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| 49 | unsigned rows(unsigned) const |
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| 50 | { return matrix_->rows(); } |
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| 51 | |
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| 52 | unsigned cols(unsigned) const |
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| 53 | { return matrix_->cols(); } |
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| 54 | |
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| 55 | private: |
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| 56 | _bz_MatrixRef() { } |
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| 57 | |
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| 58 | const Matrix<P_numtype, P_structure>* matrix_; |
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| 59 | }; |
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| 60 | |
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| 61 | BZ_NAMESPACE_END |
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| 62 | |
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| 63 | #endif // BZ_MATREF_H |
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