| 1 | // -*- C++ -*- |
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| 2 | /*************************************************************************** |
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| 3 | * blitz/vecexprwrap.h Vector expression templates wrapper class |
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| 4 | * |
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| 5 | * $Id: vecexprwrap.h,v 1.5 2005/05/07 04:17:56 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_VECEXPRWRAP_H |
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| 28 | #define BZ_VECEXPRWRAP_H |
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| 29 | |
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| 30 | #ifndef BZ_BLITZ_H |
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| 31 | #include <blitz/blitz.h> |
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| 32 | #endif |
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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_expr> |
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| 37 | class _bz_VecExpr { |
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| 38 | |
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| 39 | public: |
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| 40 | typedef P_expr T_expr; |
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| 41 | typedef _bz_typename T_expr::T_numtype T_numtype; |
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| 42 | |
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| 43 | #ifdef BZ_PASS_EXPR_BY_VALUE |
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| 44 | _bz_VecExpr(T_expr a) |
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| 45 | : iter_(a) |
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| 46 | { } |
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| 47 | #else |
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| 48 | _bz_VecExpr(const T_expr& a) |
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| 49 | : iter_(a) |
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| 50 | { } |
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| 51 | #endif |
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| 52 | |
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| 53 | #ifdef BZ_MANUAL_VECEXPR_COPY_CONSTRUCTOR |
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| 54 | _bz_VecExpr(const _bz_VecExpr<T_expr>& a) |
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| 55 | : iter_(a.iter_) |
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| 56 | { } |
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| 57 | #endif |
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| 58 | |
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| 59 | T_numtype operator[](int i) const |
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| 60 | { return iter_[i]; } |
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| 61 | |
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| 62 | T_numtype operator()(int i) const |
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| 63 | { return iter_(i); } |
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| 64 | |
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| 65 | int length(int recommendedLength) const |
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| 66 | { return iter_.length(recommendedLength); } |
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| 67 | |
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| 68 | static const int |
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| 69 | _bz_staticLengthCount = P_expr::_bz_staticLengthCount, |
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| 70 | _bz_dynamicLengthCount = P_expr::_bz_dynamicLengthCount, |
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| 71 | _bz_staticLength = P_expr::_bz_staticLength; |
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| 72 | |
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| 73 | int _bz_suggestLength() const |
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| 74 | { return iter_._bz_suggestLength(); } |
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| 75 | |
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| 76 | bool _bz_hasFastAccess() const |
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| 77 | { return iter_._bz_hasFastAccess(); } |
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| 78 | |
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| 79 | T_numtype _bz_fastAccess(int i) const |
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| 80 | { return iter_._bz_fastAccess(i); } |
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| 81 | |
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| 82 | private: |
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| 83 | _bz_VecExpr(); |
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| 84 | |
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| 85 | T_expr iter_; |
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| 86 | }; |
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| 87 | |
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| 88 | BZ_NAMESPACE_END |
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| 89 | |
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| 90 | #endif // BZ_VECEXPRWRAP_H |
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