1 | // -*- C++ -*- |
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2 | /*************************************************************************** |
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3 | * blitz/indexexpr.h Declaration of the IndexPlaceholder<N> class |
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4 | * |
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5 | * $Id: indexexpr.h,v 1.7 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 | * p://seurat.uhttwaterloo.ca/blitz/ |
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24 | * |
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25 | ***************************************************************************/ |
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26 | |
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27 | #ifndef BZ_INDEXEXPR_H |
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28 | #define BZ_INDEXEXPR_H |
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29 | |
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30 | #include <blitz/tinyvec.h> |
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31 | #include <blitz/prettyprint.h> |
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32 | #include <blitz/etbase.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<int N> |
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37 | class IndexPlaceholder |
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38 | #ifdef BZ_NEW_EXPRESSION_TEMPLATES |
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39 | : public ETBase<IndexPlaceholder<N> > |
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40 | #endif |
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41 | { |
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42 | public: |
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43 | IndexPlaceholder() |
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44 | { } |
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45 | |
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46 | #ifdef BZ_NEW_EXPRESSION_TEMPLATES |
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47 | IndexPlaceholder(const IndexPlaceholder<N>& x) |
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48 | : ETBase< IndexPlaceholder<N> >(x) |
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49 | { } |
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50 | #else |
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51 | IndexPlaceholder(const IndexPlaceholder<N>&) |
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52 | { } |
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53 | #endif |
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54 | |
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55 | ~IndexPlaceholder() |
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56 | { } |
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57 | |
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58 | void operator=(const IndexPlaceholder<N>&) |
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59 | { } |
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60 | |
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61 | typedef int T_numtype; |
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62 | typedef int T_ctorArg1; // Dummy; not used |
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63 | typedef int T_ctorArg2; // Ditto |
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64 | |
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65 | static const int |
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66 | numArrayOperands = 0, |
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67 | numIndexPlaceholders = 1, |
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68 | rank = N+1; |
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69 | |
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70 | // If you have a precondition failure on this routine, it means |
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71 | // you are trying to use stack iteration mode on an expression |
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72 | // which contains an index placeholder. You must use index |
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73 | // iteration mode instead. |
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74 | int operator*() { |
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75 | BZPRECONDITION(0); |
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76 | return 0; |
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77 | } |
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78 | |
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79 | #ifdef BZ_ARRAY_EXPR_PASS_INDEX_BY_VALUE |
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80 | template<int N_rank> |
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81 | T_numtype operator()(TinyVector<int, N_rank> i) { return i[N]; } |
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82 | #else |
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83 | template<int N_rank> |
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84 | T_numtype operator()(const TinyVector<int, N_rank>& i) { return i[N]; } |
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85 | #endif |
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86 | |
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87 | int ascending(int) const { return INT_MIN; } |
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88 | int ordering(int) const { return INT_MIN; } |
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89 | int lbound(int) const { return INT_MIN; } // tiny(int()); |
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90 | int ubound(int) const { return INT_MAX; } // huge(int()); |
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91 | |
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92 | // See operator*() note |
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93 | |
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94 | void push(int) { BZPRECONDITION(0); } |
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95 | void pop(int) { BZPRECONDITION(0); } |
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96 | void advance() { BZPRECONDITION(0); } |
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97 | void advance(int) { BZPRECONDITION(0); } |
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98 | void loadStride(int) { BZPRECONDITION(0); } |
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99 | |
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100 | bool isUnitStride(int) const { |
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101 | BZPRECONDITION(0); |
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102 | return false; |
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103 | } |
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104 | |
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105 | void advanceUnitStride() { BZPRECONDITION(0); } |
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106 | |
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107 | bool canCollapse(int,int) const { |
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108 | BZPRECONDITION(0); |
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109 | return false; |
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110 | } |
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111 | |
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112 | T_numtype operator[](int) { |
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113 | BZPRECONDITION(0); |
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114 | return T_numtype(); |
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115 | } |
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116 | |
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117 | T_numtype fastRead(int) { |
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118 | BZPRECONDITION(0); |
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119 | return T_numtype(); |
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120 | } |
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121 | |
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122 | int suggestStride(int) const { |
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123 | BZPRECONDITION(0); |
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124 | return 0; |
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125 | } |
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126 | |
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127 | bool isStride(int,int) const { |
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128 | BZPRECONDITION(0); |
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129 | return true; |
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130 | } |
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131 | |
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132 | void prettyPrint(BZ_STD_SCOPE(string) &str, prettyPrintFormat&) const { |
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133 | // NEEDS_WORK-- do real formatting for reductions |
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134 | str += "index-expr[NEEDS_WORK]"; |
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135 | } |
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136 | |
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137 | template<typename T_shape> |
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138 | bool shapeCheck(const T_shape&) const { return true; } |
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139 | }; |
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140 | |
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141 | typedef IndexPlaceholder<0> firstIndex; |
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142 | typedef IndexPlaceholder<1> secondIndex; |
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143 | typedef IndexPlaceholder<2> thirdIndex; |
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144 | typedef IndexPlaceholder<3> fourthIndex; |
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145 | typedef IndexPlaceholder<4> fifthIndex; |
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146 | typedef IndexPlaceholder<5> sixthIndex; |
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147 | typedef IndexPlaceholder<6> seventhIndex; |
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148 | typedef IndexPlaceholder<7> eighthIndex; |
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149 | typedef IndexPlaceholder<8> ninthIndex; |
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150 | typedef IndexPlaceholder<9> tenthIndex; |
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151 | typedef IndexPlaceholder<10> eleventhIndex; |
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152 | |
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153 | #ifndef BZ_NO_TENSOR_INDEX_OBJECTS |
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154 | |
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155 | BZ_NAMESPACE(tensor) |
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156 | _bz_global blitz::IndexPlaceholder<0> i; |
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157 | _bz_global blitz::IndexPlaceholder<1> j; |
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158 | _bz_global blitz::IndexPlaceholder<2> k; |
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159 | _bz_global blitz::IndexPlaceholder<3> l; |
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160 | _bz_global blitz::IndexPlaceholder<4> m; |
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161 | _bz_global blitz::IndexPlaceholder<5> n; |
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162 | _bz_global blitz::IndexPlaceholder<6> o; |
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163 | _bz_global blitz::IndexPlaceholder<7> p; |
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164 | _bz_global blitz::IndexPlaceholder<8> q; |
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165 | _bz_global blitz::IndexPlaceholder<9> r; |
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166 | _bz_global blitz::IndexPlaceholder<10> s; |
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167 | _bz_global blitz::IndexPlaceholder<11> t; |
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168 | BZ_NAMESPACE_END // tensor |
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169 | |
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170 | #endif |
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171 | |
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172 | BZ_NAMESPACE_END |
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173 | |
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174 | #endif // BZ_INDEXEXPR_H |
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175 | |
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