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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, 1997 John W. Eaton |
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1988
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 */ |
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23 |
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24 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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25 #pragma implementation |
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26 #endif |
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27 |
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28 #ifdef HAVE_CONFIG_H |
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29 #include <config.h> |
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30 #endif |
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31 |
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32 #include <cassert> |
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33 |
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34 #include <iostream> |
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35 |
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36 #include "DiagArray2.h" |
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37 |
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38 #include "lo-error.h" |
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39 |
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40 // A two-dimensional array with diagonal elements only. |
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41 |
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42 template <class T> |
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43 T |
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44 DiagArray2<T>::elem (int r, int c) const |
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45 { |
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46 return (r == c) ? Array<T>::xelem (r) : T (0); |
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47 } |
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48 |
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49 template <class T> |
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50 T |
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51 DiagArray2<T>::checkelem (int r, int c) const |
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52 { |
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53 if (r < 0 || c < 0 || r >= this->dim1 () || c >= this->dim2 ()) |
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54 { |
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55 (*current_liboctave_error_handler) ("range error in DiagArray2"); |
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56 return T (); |
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57 } |
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58 return (r == c) ? Array<T>::xelem (r) : T (0); |
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59 } |
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60 |
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61 template <class T> |
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62 T |
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63 DiagArray2<T>::operator () (int r, int c) const |
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64 { |
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65 if (r < 0 || c < 0 || r >= this->dim1 () || c >= this->dim2 ()) |
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66 { |
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67 (*current_liboctave_error_handler) ("range error in DiagArray2"); |
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68 return T (); |
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69 } |
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70 return (r == c) ? Array<T>::xelem (r) : T (0); |
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71 } |
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72 |
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73 template <class T> |
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74 T& |
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75 DiagArray2<T>::xelem (int r, int c) |
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76 { |
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77 static T foo (0); |
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78 return (r == c) ? Array<T>::xelem (r) : foo; |
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79 } |
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80 |
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81 template <class T> |
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82 T |
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83 DiagArray2<T>::xelem (int r, int c) const |
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84 { |
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85 return (r == c) ? Array<T>::xelem (r) : T (0); |
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86 } |
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87 |
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88 template <class T> |
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89 void |
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90 DiagArray2<T>::resize (int r, int c) |
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91 { |
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92 if (r < 0 || c < 0) |
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93 { |
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94 (*current_liboctave_error_handler) ("can't resize to negative dimensions"); |
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95 return; |
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96 } |
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97 |
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98 if (r == this->dim1 () && c == this->dim2 ()) |
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99 return; |
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100 |
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101 typename Array<T>::ArrayRep *old_rep = Array<T>::rep; |
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102 const T *old_data = this->data (); |
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103 int old_len = this->length (); |
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104 |
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105 int new_len = r < c ? r : c; |
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106 |
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107 Array<T>::rep = new typename Array<T>::ArrayRep (new_len); |
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108 |
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109 this->dimensions = dim_vector (r, c); |
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110 |
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111 if (old_data && old_len > 0) |
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112 { |
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113 int min_len = old_len < new_len ? old_len : new_len; |
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114 |
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115 for (int i = 0; i < min_len; i++) |
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116 xelem (i, i) = old_data[i]; |
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117 } |
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118 |
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119 if (--old_rep->count <= 0) |
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120 delete old_rep; |
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121 } |
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122 |
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123 template <class T> |
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124 void |
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125 DiagArray2<T>::resize (int r, int c, const T& val) |
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126 { |
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127 if (r < 0 || c < 0) |
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128 { |
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129 (*current_liboctave_error_handler) ("can't resize to negative dimensions"); |
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130 return; |
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131 } |
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132 |
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133 if (r == this->dim1 () && c == this->dim2 ()) |
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134 return; |
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135 |
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136 typename Array<T>::ArrayRep *old_rep = Array<T>::rep; |
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137 const T *old_data = this->data (); |
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138 int old_len = this->length (); |
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139 |
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140 int new_len = r < c ? r : c; |
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141 |
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142 Array<T>::rep = new typename Array<T>::ArrayRep (new_len); |
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143 |
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144 this->dimensions = dim_vector (r, c); |
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145 |
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146 int min_len = old_len < new_len ? old_len : new_len; |
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147 |
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148 if (old_data && old_len > 0) |
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149 { |
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150 for (int i = 0; i < min_len; i++) |
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151 xelem (i, i) = old_data[i]; |
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152 } |
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153 |
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154 for (int i = min_len; i < new_len; i++) |
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155 xelem (i, i) = val; |
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156 |
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157 if (--old_rep->count <= 0) |
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158 delete old_rep; |
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159 } |
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160 |
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161 /* |
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162 ;;; Local Variables: *** |
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163 ;;; mode: C++ *** |
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164 ;;; End: *** |
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165 */ |
