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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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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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21 02110-1301, USA. |
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22 |
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23 */ |
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24 |
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25 #ifdef HAVE_CONFIG_H |
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26 #include <config.h> |
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27 #endif |
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28 |
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29 #include <cassert> |
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30 |
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31 #include <iostream> |
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32 |
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33 #include "DiagArray2.h" |
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34 |
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35 #include "lo-error.h" |
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36 |
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37 // A two-dimensional array with diagonal elements only. |
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38 |
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39 template <class T> |
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40 T |
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41 DiagArray2<T>::elem (octave_idx_type r, octave_idx_type c) const |
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42 { |
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43 return (r == c) ? Array<T>::xelem (r) : T (0); |
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44 } |
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45 |
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46 template <class T> |
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47 T |
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48 DiagArray2<T>::checkelem (octave_idx_type r, octave_idx_type c) const |
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49 { |
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50 if (r < 0 || c < 0 || r >= this->dim1 () || c >= this->dim2 ()) |
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51 { |
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52 (*current_liboctave_error_handler) ("range error in DiagArray2"); |
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53 return T (); |
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54 } |
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55 return (r == c) ? Array<T>::xelem (r) : T (0); |
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56 } |
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57 |
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58 template <class T> |
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59 T |
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60 DiagArray2<T>::operator () (octave_idx_type r, octave_idx_type c) const |
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61 { |
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62 if (r < 0 || c < 0 || r >= this->dim1 () || c >= this->dim2 ()) |
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63 { |
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64 (*current_liboctave_error_handler) ("range error in DiagArray2"); |
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65 return T (); |
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66 } |
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67 return (r == c) ? Array<T>::xelem (r) : T (0); |
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68 } |
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69 |
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70 template <class T> |
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71 T& |
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72 DiagArray2<T>::xelem (octave_idx_type r, octave_idx_type c) |
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73 { |
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74 static T foo (0); |
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75 return (r == c) ? Array<T>::xelem (r) : foo; |
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76 } |
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77 |
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78 template <class T> |
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79 T |
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80 DiagArray2<T>::xelem (octave_idx_type r, octave_idx_type c) const |
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81 { |
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82 return (r == c) ? Array<T>::xelem (r) : T (0); |
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83 } |
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84 |
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85 template <class T> |
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86 void |
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87 DiagArray2<T>::resize (octave_idx_type r, octave_idx_type c) |
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88 { |
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89 if (r < 0 || c < 0) |
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90 { |
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91 (*current_liboctave_error_handler) ("can't resize to negative dimensions"); |
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92 return; |
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93 } |
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94 |
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95 if (r == this->dim1 () && c == this->dim2 ()) |
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96 return; |
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97 |
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98 typename Array<T>::ArrayRep *old_rep = Array<T>::rep; |
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99 const T *old_data = this->data (); |
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100 octave_idx_type old_len = this->length (); |
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101 |
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102 octave_idx_type new_len = r < c ? r : c; |
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103 |
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104 Array<T>::rep = new typename Array<T>::ArrayRep (new_len); |
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105 |
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106 this->dimensions = dim_vector (r, c); |
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107 |
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108 if (old_data && old_len > 0) |
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109 { |
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110 octave_idx_type min_len = old_len < new_len ? old_len : new_len; |
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111 |
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112 for (octave_idx_type i = 0; i < min_len; i++) |
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113 xelem (i, i) = old_data[i]; |
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114 } |
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115 |
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116 if (--old_rep->count <= 0) |
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117 delete old_rep; |
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118 } |
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119 |
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120 template <class T> |
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121 void |
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122 DiagArray2<T>::resize (octave_idx_type r, octave_idx_type c, const T& val) |
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123 { |
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124 if (r < 0 || c < 0) |
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125 { |
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126 (*current_liboctave_error_handler) ("can't resize to negative dimensions"); |
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127 return; |
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128 } |
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129 |
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130 if (r == this->dim1 () && c == this->dim2 ()) |
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131 return; |
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132 |
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133 typename Array<T>::ArrayRep *old_rep = Array<T>::rep; |
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134 const T *old_data = this->data (); |
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135 octave_idx_type old_len = this->length (); |
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136 |
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137 octave_idx_type new_len = r < c ? r : c; |
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138 |
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139 Array<T>::rep = new typename Array<T>::ArrayRep (new_len); |
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140 |
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141 this->dimensions = dim_vector (r, c); |
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142 |
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143 octave_idx_type min_len = old_len < new_len ? old_len : new_len; |
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144 |
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145 if (old_data && old_len > 0) |
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146 { |
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147 for (octave_idx_type i = 0; i < min_len; i++) |
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148 xelem (i, i) = old_data[i]; |
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149 } |
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150 |
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151 for (octave_idx_type i = min_len; i < new_len; i++) |
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152 xelem (i, i) = val; |
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153 |
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154 if (--old_rep->count <= 0) |
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155 delete old_rep; |
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156 } |
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157 |
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158 /* |
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159 ;;; Local Variables: *** |
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160 ;;; mode: C++ *** |
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161 ;;; End: *** |
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162 */ |
