| 1 | // -*- C++ -*- |
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| 2 | /*************************************************************************** |
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| 3 | * blitz/meta/matassign.h TinyMatrix assignment metaprogram |
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| 4 | * |
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| 5 | * $Id: matassign.h,v 1.6 2005/05/07 04:17:57 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 | |
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| 28 | #ifndef BZ_META_MATASSIGN_H |
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| 29 | #define BZ_META_MATASSIGN_H |
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| 30 | |
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| 31 | BZ_NAMESPACE(blitz) |
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| 32 | |
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| 33 | template<int N_rows, int N_columns, int I, int J> |
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| 34 | class _bz_meta_matAssign2 { |
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| 35 | public: |
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| 36 | static const int go = (J < N_columns - 1) ? 1 : 0; |
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| 37 | |
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| 38 | template<typename T_matrix, typename T_expr, typename T_updater> |
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| 39 | static inline void f(T_matrix& mat, T_expr expr, T_updater u) |
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| 40 | { |
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| 41 | u.update(mat(I,J), expr(I,J)); |
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| 42 | _bz_meta_matAssign2<N_rows * go, N_columns * go, I * go, (J+1) * go> |
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| 43 | ::f(mat, expr, u); |
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| 44 | } |
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| 45 | }; |
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| 46 | |
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| 47 | template<> |
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| 48 | class _bz_meta_matAssign2<0,0,0,0> { |
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| 49 | public: |
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| 50 | template<typename T_matrix, typename T_expr, typename T_updater> |
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| 51 | static inline void f(T_matrix&, T_expr, T_updater) |
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| 52 | { } |
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| 53 | }; |
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| 54 | |
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| 55 | template<int N_rows, int N_columns, int I> |
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| 56 | class _bz_meta_matAssign { |
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| 57 | public: |
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| 58 | static const int go = (I < N_rows-1) ? 1 : 0; |
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| 59 | |
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| 60 | template<typename T_matrix, typename T_expr, typename T_updater> |
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| 61 | static inline void f(T_matrix& mat, T_expr expr, T_updater u) |
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| 62 | { |
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| 63 | _bz_meta_matAssign2<N_rows, N_columns, I, 0>::f(mat, expr, u); |
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| 64 | _bz_meta_matAssign<N_rows * go, N_columns * go, (I+1) * go> |
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| 65 | ::f(mat, expr, u); |
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| 66 | } |
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| 67 | }; |
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| 68 | |
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| 69 | template<> |
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| 70 | class _bz_meta_matAssign<0,0,0> { |
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| 71 | public: |
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| 72 | template<typename T_matrix, typename T_expr, typename T_updater> |
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| 73 | static inline void f(T_matrix&, T_expr, T_updater) |
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| 74 | { } |
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| 75 | }; |
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| 76 | |
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| 77 | |
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| 78 | BZ_NAMESPACE_END |
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| 79 | |
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| 80 | #endif // BZ_META_ASSIGN_H |
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