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Implement proper op() indexing for diagonal matrices (bug #36368) * DiagArray2.h (DiagArray2<T>::check_idx): New function. (DiagArray2<T>::checkelem): Deleted. (DiagArray2<T>::operator()): New non-const version, returns references. Conditionally call check_idx. * DiagArray2.cc (DiagArray2<T>::check_idx): Contents copied over from checkelem. (DiagArray2<T>::checkelem): Deleted. * ov-base-diag.cc (octave_base_diag<DMT, MT>::do_index_op): Replace call to now-inaccessible checkelem() with elem(). * ov-cx-diag.cc: Add a test for this bug.
author Jordi Gutiérrez Hermoso <jordigh@octave.org>
date Wed, 02 May 2012 17:29:40 -0400
parents 72c96de7a403
children 13cc11418393 63ae976ac2e7
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1 // Template array classes
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2 /*
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3
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4 Copyright (C) 1996-2012 John W. Eaton
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5 Copyright (C) 2008-2009 Jaroslav Hajek
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6 Copyright (C) 2010 VZLU Prague
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7
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8 This file is part of Octave.
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9
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10 Octave is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by the
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12 Free Software Foundation; either version 3 of the License, or (at your
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13 option) any later version.
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14
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15 Octave is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 for more details.
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19
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20 You should have received a copy of the GNU General Public License
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21 along with Octave; see the file COPYING. If not, see
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22 <http://www.gnu.org/licenses/>.
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24 */
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26 #if !defined (octave_DiagArray2_h)
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27 #define octave_DiagArray2_h 1
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29 #include <cassert>
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30 #include <cstdlib>
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32 #include "Array.h"
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34 // Array<T> is inherited privately so that some methods, like index, don't
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35 // produce unexpected results.
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36
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37 template <class T>
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38 class
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39 DiagArray2 : protected Array<T>
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40 {
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41 protected:
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42 octave_idx_type d1, d2;
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46 using typename Array<T>::element_type;
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47
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48 DiagArray2 (void)
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49 : Array<T> (), d1 (0), d2 (0) { }
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51 DiagArray2 (octave_idx_type r, octave_idx_type c)
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52 : Array<T> (dim_vector (std::min (r, c), 1)), d1 (r), d2 (c) { }
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54 DiagArray2 (octave_idx_type r, octave_idx_type c, const T& val)
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55 : Array<T> (dim_vector (std::min (r, c), 1), val), d1 (r), d2 (c) { }
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57 explicit DiagArray2 (const Array<T>& a)
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58 : Array<T> (a.as_column ()), d1 (a.numel ()), d2 (a.numel ()) { }
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60 DiagArray2 (const Array<T>& a, octave_idx_type r, octave_idx_type c);
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62 DiagArray2 (const DiagArray2<T>& a)
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63 : Array<T> (a), d1 (a.d1), d2 (a.d2) { }
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65 template <class U>
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66 DiagArray2 (const DiagArray2<U>& a)
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67 : Array<T> (a.diag ()), d1 (a.dim1 ()), d2 (a.dim2 ()) { }
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69 ~DiagArray2 (void) { }
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71 DiagArray2<T>& operator = (const DiagArray2<T>& a)
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72 {
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73 if (this != &a)
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74 {
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75 Array<T>::operator = (a);
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76 d1 = a.d1;
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77 d2 = a.d2;
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78 }
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80 return *this;
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83 octave_idx_type dim1 (void) const { return d1; }
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84 octave_idx_type dim2 (void) const { return d2; }
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85
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86 octave_idx_type rows (void) const { return dim1 (); }
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87 octave_idx_type cols (void) const { return dim2 (); }
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88 octave_idx_type columns (void) const { return dim2 (); }
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89
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90 octave_idx_type diag_length (void) const { return Array<T>::length (); }
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91 // FIXME: a dangerous ambiguity?
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92 octave_idx_type length (void) const { return Array<T>::length (); }
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93 octave_idx_type nelem (void) const { return dim1 () * dim2 (); }
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94 octave_idx_type numel (void) const { return nelem (); }
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95
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96 size_t byte_size (void) const { return Array<T>::byte_size (); }
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97
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98 dim_vector dims (void) const { return dim_vector (d1, d2); }
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99
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100 Array<T> diag (octave_idx_type k = 0) const;
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101
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102 // Warning: the non-const two-index versions will silently ignore assignments
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103 // to off-diagonal elements.
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105 T elem (octave_idx_type r, octave_idx_type c) const
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106 {
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107 return (r == c) ? Array<T>::elem (r) : T (0);
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108 }
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109
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110 T& elem (octave_idx_type r, octave_idx_type c)
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111 {
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112 static T zero (0);
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113 return (r == c) ? Array<T>::elem (r) : zero;
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114 }
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115
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116 T dgelem (octave_idx_type i) const
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117 { return Array<T>::elem (i); }
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118
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119 T& dgelem (octave_idx_type i)
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120 { return Array<T>::elem (i); }
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121
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122 void check_idx (octave_idx_type r, octave_idx_type c) const;
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123
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124 T operator () (octave_idx_type r, octave_idx_type c) const
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125 {
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126 #if defined (BOUNDS_CHECKING)
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127 check_idx (r, c);
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128 #endif
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129 return elem (r, c);
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130 }
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131
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132 T& operator () (octave_idx_type r, octave_idx_type c)
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133 {
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134 #if defined (BOUNDS_CHECKING)
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135 check_idx (r, c);
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136 #endif
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137 return elem (r, c);
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138 }
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139
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140 // No checking.
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141
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142 T xelem (octave_idx_type r, octave_idx_type c) const
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143 {
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144 return (r == c) ? Array<T>::xelem (r) : T (0);
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145 }
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146
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147 T& dgxelem (octave_idx_type i)
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148 { return Array<T>::xelem (i); }
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149
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150 T dgxelem (octave_idx_type i) const
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151 { return Array<T>::xelem (i); }
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152
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John W. Eaton <jwe@octave.org>
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153 void resize (octave_idx_type n, octave_idx_type m,
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154 const T& rfv = Array<T>::resize_fill_value ());
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155
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156 DiagArray2<T> transpose (void) const;
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157 DiagArray2<T> hermitian (T (*fcn) (const T&) = 0) const;
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158
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159 Array<T> array_value (void) const;
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160
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161 const T *data (void) const { return Array<T>::data (); }
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162
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163 const T *fortran_vec (void) const { return Array<T>::fortran_vec (); }
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164
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165 T *fortran_vec (void) { return Array<T>::fortran_vec (); }
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166
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167 void print_info (std::ostream& os, const std::string& prefix) const
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168 { Array<T>::print_info (os, prefix); }
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169 };
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170
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171 #endif