| 1 | /***************************************************************************
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| 2 | * blitz/vecexpr.h Vector<P_numtype> expression templates
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| 3 | *
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| 4 | * $Id: vecexpr.h,v 1.1.1.1 1999-04-09 17:59:00 ansari Exp $
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| 5 | *
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| 6 | * Copyright (C) 1997,1998 Todd Veldhuizen <tveldhui@seurat.uwaterloo.ca>
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| 7 | *
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| 8 | * This program is free software; you can redistribute it and/or
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| 9 | * modify it under the terms of the GNU General Public License
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| 10 | * as published by the Free Software Foundation; either version 2
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| 11 | * of the License, or (at your option) any later version.
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| 12 | *
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| 13 | * This program is distributed in the hope that it will be useful,
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| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | * GNU General Public License for more details.
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| 17 | *
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| 18 | * Suggestions: blitz-suggest@cybervision.com
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| 19 | * Bugs: blitz-bugs@cybervision.com
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| 20 | *
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| 21 | * For more information, please see the Blitz++ Home Page:
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| 22 | * http://seurat.uwaterloo.ca/blitz/
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| 23 | *
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| 24 | ***************************************************************************
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| 25 | * $Log: not supported by cvs2svn $
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| 26 | * Revision 1.6 1998/03/14 00:04:47 tveldhui
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| 27 | * 0.2-alpha-05
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| 28 | *
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| 29 | * Revision 1.5 1997/07/16 14:51:20 tveldhui
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| 30 | * Update: Alpha release 0.2 (Arrays)
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| 31 | *
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| 32 | * Revision 1.4 1997/01/24 14:42:00 tveldhui
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| 33 | * Periodic RCS update
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| 34 | *
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| 35 | * Revision 1.3 1997/01/23 03:28:28 tveldhui
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| 36 | * Periodic RCS update
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| 37 | *
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| 38 | * Revision 1.2 1997/01/13 22:19:58 tveldhui
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| 39 | * Periodic RCS update
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| 40 | *
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| 41 | *
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| 42 | */
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| 43 |
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| 44 |
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| 45 | #ifndef BZ_VECEXPR_H
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| 46 | #define BZ_VECEXPR_H
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| 47 |
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| 48 | #ifndef BZ_VECTOR_H
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| 49 | #include <blitz/vector.h>
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| 50 | #endif
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| 51 |
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| 52 | #ifndef BZ_APPLICS_H
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| 53 | #include <blitz/applics.h>
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| 54 | #endif
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| 55 |
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| 56 | #ifndef BZ_META_METAPROG_H
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| 57 | #include <blitz/meta/metaprog.h>
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| 58 | #endif
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| 59 |
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| 60 | #ifndef BZ_VECEXPRWRAP_H
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| 61 | #include <blitz/vecexprwrap.h> // _bz_VecExpr wrapper class
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| 62 | #endif
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| 63 |
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| 64 | BZ_NAMESPACE(blitz)
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| 65 |
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| 66 | template<class P_expr1, class P_expr2, class P_op>
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| 67 | class _bz_VecExprOp {
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| 68 |
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| 69 | public:
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| 70 | typedef P_expr1 T_expr1;
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| 71 | typedef P_expr2 T_expr2;
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| 72 | typedef _bz_typename T_expr1::T_numtype T_numtype1;
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| 73 | typedef _bz_typename T_expr2::T_numtype T_numtype2;
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| 74 | typedef BZ_PROMOTE(T_numtype1, T_numtype2) T_numtype;
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| 75 | typedef P_op T_op;
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| 76 |
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| 77 | #ifdef BZ_PASS_EXPR_BY_VALUE
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| 78 | _bz_VecExprOp(T_expr1 a, T_expr2 b)
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| 79 | : iter1_(a), iter2_(b)
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| 80 | { }
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| 81 | #else
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| 82 | _bz_VecExprOp(const T_expr1& a, const T_expr2& b)
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| 83 | : iter1_(a), iter2_(b)
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| 84 | { }
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| 85 | #endif
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| 86 |
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| 87 | #ifdef BZ_MANUAL_VECEXPR_COPY_CONSTRUCTOR
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| 88 | _bz_VecExprOp(const _bz_VecExprOp<P_expr1, P_expr2, P_op>& x)
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| 89 | : iter1_(x.iter1_), iter2_(x.iter2_)
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| 90 | { }
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| 91 | #endif
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| 92 |
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| 93 | T_numtype operator[](int i) const
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| 94 | { return T_op::apply(iter1_[i], iter2_[i]); }
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| 95 |
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| 96 | T_numtype operator()(int i) const
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| 97 | { return T_op::apply(iter1_(i), iter2_(i)); }
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| 98 |
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| 99 | int length(int recommendedLength) const
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| 100 | {
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| 101 | BZPRECONDITION(iter2_.length(recommendedLength) ==
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| 102 | iter1_.length(recommendedLength));
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| 103 | return iter1_.length(recommendedLength);
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| 104 | }
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| 105 |
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| 106 | enum {
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| 107 | _bz_staticLengthCount =
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| 108 | BZ_ENUM_CAST(P_expr1::_bz_staticLengthCount)
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| 109 | + BZ_ENUM_CAST(P_expr2::_bz_staticLengthCount),
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| 110 |
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| 111 | _bz_dynamicLengthCount =
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| 112 | BZ_ENUM_CAST(P_expr1::_bz_dynamicLengthCount)
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| 113 | + BZ_ENUM_CAST(P_expr2::_bz_dynamicLengthCount),
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| 114 |
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| 115 | _bz_staticLength = (BZ_ENUM_CAST(P_expr1::_bz_staticLength) > BZ_ENUM_CAST(P_expr2::_bz_staticLength)) ? BZ_ENUM_CAST(P_expr1::_bz_staticLength) : BZ_ENUM_CAST(P_expr2::_bz_staticLength)
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| 116 |
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| 117 | // _bz_meta_max<P_expr1::_bz_staticLength, P_expr2::_bz_staticLength>::max
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| 118 | };
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| 119 |
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| 120 | int _bz_suggestLength() const
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| 121 | {
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| 122 | int length1 = iter1_._bz_suggestLength();
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| 123 | if (length1 != 0)
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| 124 | return length1;
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| 125 | return iter2_._bz_suggestLength();
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| 126 | }
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| 127 |
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| 128 | _bz_bool _bz_hasFastAccess() const
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| 129 | { return iter1_._bz_hasFastAccess() && iter2_._bz_hasFastAccess(); }
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| 130 |
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| 131 | T_numtype _bz_fastAccess(int i) const
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| 132 | {
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| 133 | return T_op::apply(iter1_._bz_fastAccess(i),
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| 134 | iter2_._bz_fastAccess(i));
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| 135 | }
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| 136 |
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| 137 | private:
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| 138 | _bz_VecExprOp();
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| 139 |
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| 140 | T_expr1 iter1_;
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| 141 | T_expr2 iter2_;
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| 142 | };
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| 143 |
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| 144 | template<class P_expr, class P_unaryOp>
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| 145 | class _bz_VecExprUnaryOp {
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| 146 |
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| 147 | public:
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| 148 | typedef P_expr T_expr;
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| 149 | typedef P_unaryOp T_unaryOp;
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| 150 | typedef _bz_typename T_unaryOp::T_numtype T_numtype;
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| 151 |
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| 152 | #ifdef BZ_PASS_EXPR_BY_VALUE
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| 153 | _bz_VecExprUnaryOp(T_expr iter)
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| 154 | : iter_(iter)
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| 155 | { }
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| 156 | #else
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| 157 | _bz_VecExprUnaryOp(const T_expr& iter)
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| 158 | : iter_(iter)
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| 159 | { }
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| 160 | #endif
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| 161 |
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| 162 | #ifdef BZ_MANUAL_VECEXPR_COPY_CONSTRUCTOR
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| 163 | _bz_VecExprUnaryOp(const _bz_VecExprUnaryOp<P_expr, P_unaryOp>& x)
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| 164 | : iter_(x.iter_)
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| 165 | { }
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| 166 | #endif
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| 167 |
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| 168 | T_numtype operator[](int i) const
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| 169 | { return T_unaryOp::apply(iter_[i]); }
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| 170 |
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| 171 | T_numtype operator()(int i) const
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| 172 | { return T_unaryOp::apply(iter_(i)); }
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| 173 |
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| 174 | int length(int recommendedLength) const
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| 175 | { return iter_.length(recommendedLength); }
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| 176 |
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| 177 | enum { _bz_staticLengthCount = BZ_ENUM_CAST(P_expr::_bz_staticLengthCount),
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| 178 | _bz_dynamicLengthCount =BZ_ENUM_CAST(P_expr::_bz_dynamicLengthCount),
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| 179 | _bz_staticLength = BZ_ENUM_CAST(P_expr::_bz_staticLength) };
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| 180 |
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| 181 | int _bz_suggestLength() const
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| 182 | { return iter_._bz_suggestLength(); }
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| 183 |
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| 184 | _bz_bool _bz_hasFastAccess() const
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| 185 | { return iter_._bz_hasFastAccess(); }
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| 186 |
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| 187 | T_numtype _bz_fastAccess(int i) const
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| 188 | { return T_unaryOp::apply(iter_._bz_fastAccess(i)); }
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| 189 |
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| 190 | private:
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| 191 | _bz_VecExprUnaryOp() { }
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| 192 |
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| 193 | T_expr iter_;
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| 194 | };
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| 195 |
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| 196 | template<class P_numtype>
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| 197 | class _bz_VecExprConstant {
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| 198 | public:
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| 199 | typedef P_numtype T_numtype;
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| 200 |
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| 201 | _bz_VecExprConstant(P_numtype value)
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| 202 | : value_(BZ_NO_PROPAGATE(value))
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| 203 | {
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| 204 | }
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| 205 |
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| 206 | #ifdef BZ_MANUAL_VECEXPR_COPY_CONSTRUCTOR
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| 207 | _bz_VecExprConstant(const _bz_VecExprConstant<P_numtype>& x)
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| 208 | : value_(x.value_)
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| 209 | { }
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| 210 | #endif
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| 211 |
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| 212 | T_numtype operator[](int) const
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| 213 | { return value_; }
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| 214 |
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| 215 | T_numtype operator()(int) const
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| 216 | { return value_; }
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| 217 |
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| 218 | int length(int recommendedLength) const
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| 219 | { return recommendedLength; }
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| 220 |
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| 221 | enum { _bz_staticLengthCount = 0,
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| 222 | _bz_dynamicLengthCount = 0,
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| 223 | _bz_staticLength = 0
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| 224 | };
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| 225 |
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| 226 | int _bz_suggestLength() const
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| 227 | { return 0; }
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| 228 |
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| 229 | _bz_bool _bz_hasFastAccess() const
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| 230 | { return 1; }
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| 231 |
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| 232 | T_numtype _bz_fastAccess(int) const
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| 233 | { return value_; }
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| 234 |
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| 235 | private:
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| 236 |
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| 237 | _bz_VecExprConstant() { }
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| 238 |
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| 239 | T_numtype value_;
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| 240 | };
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| 241 |
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| 242 | // Some miscellaneous operators that don't seem to belong anywhere else.
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| 243 |
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| 244 | template<class P_expr>
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| 245 | inline
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| 246 | _bz_VecExpr<_bz_VecExprUnaryOp<_bz_VecExpr<P_expr>,
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| 247 | _bz_negate<_bz_typename P_expr::T_numtype> > >
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| 248 | operator-(_bz_VecExpr<P_expr> a)
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| 249 | {
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| 250 | typedef _bz_VecExprUnaryOp<_bz_VecExpr<P_expr>,
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| 251 | _bz_negate<_bz_typename P_expr::T_numtype> > T_expr;
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| 252 | return _bz_VecExpr<T_expr>(T_expr(a));
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| 253 | }
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| 254 |
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| 255 | template<class P_numtype>
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| 256 | inline
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| 257 | _bz_VecExpr<_bz_VecExprUnaryOp<VectorIterConst<P_numtype>,
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| 258 | _bz_negate<P_numtype> > >
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| 259 | operator-(const Vector<P_numtype>& a)
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| 260 | {
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| 261 | typedef _bz_VecExprUnaryOp<VectorIterConst<P_numtype>,
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| 262 | _bz_negate<P_numtype> > T_expr;
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| 263 |
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| 264 | return _bz_VecExpr<T_expr>(T_expr(a.begin()));
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| 265 | }
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| 266 |
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| 267 | inline
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| 268 | _bz_VecExpr<_bz_VecExprUnaryOp<Range, _bz_negate<Range::T_numtype> > >
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| 269 | operator-(Range r)
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| 270 | {
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| 271 | typedef _bz_VecExprUnaryOp<Range, _bz_negate<Range::T_numtype> > T_expr;
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| 272 |
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| 273 | return _bz_VecExpr<T_expr>(T_expr(r));
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| 274 | }
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| 275 |
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| 276 |
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| 277 | // NEEDS_WORK: implement operator- for Range, VectorPick, TinyVector
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| 278 |
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| 279 | BZ_NAMESPACE_END
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| 280 |
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| 281 | #ifndef BZ_TINYVEC_H
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| 282 | #include <blitz/tinyvec.h>
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| 283 | #endif
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| 284 |
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| 285 | #include <blitz/vecbops.cc> // Operators with two operands
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| 286 | #include <blitz/vecuops.cc> // Functions with one argument
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| 287 | #include <blitz/vecbfn.cc> // Functions with two arguments
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| 288 |
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| 289 | #endif // BZ_VECEXPR_H
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