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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 #if 0 |
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43 template <class T> |
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44 T& |
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45 DiagArray2<T>::elem (int r, int c) |
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46 { |
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47 static T foo (0); |
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48 return (r == c) ? Array<T>::xelem (r) : foo; |
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49 } |
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50 |
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51 template <class T> |
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52 T& |
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53 DiagArray2<T>::checkelem (int r, int c) |
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54 { |
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55 static T foo (0); |
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56 if (r < 0 || c < 0 || r >= dim1 () || c >= dim2 ()) |
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57 { |
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58 (*current_liboctave_error_handler) ("range error in DiagArray2"); |
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59 return foo; |
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60 } |
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61 return (r == c) ? Array<T>::xelem (r) : foo; |
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62 } |
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63 |
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64 template <class T> |
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65 T& |
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66 DiagArray2<T>::operator () (int r, int c) |
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67 { |
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68 static T foo (0); |
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69 if (r < 0 || c < 0 || r >= dim1 () || c >= dim2 ()) |
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70 { |
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71 (*current_liboctave_error_handler) ("range error in DiagArray2"); |
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72 return foo; |
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73 } |
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74 return (r == c) ? Array<T>::xelem (r) : foo; |
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75 } |
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76 #endif |
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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>::elem (int r, int 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 T |
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87 DiagArray2<T>::checkelem (int r, int c) const |
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88 { |
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89 if (r < 0 || c < 0 || r >= dim1 () || c >= dim2 ()) |
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90 { |
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91 (*current_liboctave_error_handler) ("range error in DiagArray2"); |
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92 return T (); |
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93 } |
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94 return (r == c) ? Array<T>::xelem (r) : T (0); |
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95 } |
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96 |
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97 template <class T> |
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98 T |
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99 DiagArray2<T>::operator () (int r, int c) const |
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100 { |
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101 if (r < 0 || c < 0 || r >= dim1 () || c >= dim2 ()) |
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102 { |
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103 (*current_liboctave_error_handler) ("range error in DiagArray2"); |
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104 return T (); |
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105 } |
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106 return (r == c) ? Array<T>::xelem (r) : T (0); |
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107 } |
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108 |
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109 template <class T> |
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110 T& |
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111 DiagArray2<T>::xelem (int r, int c) |
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112 { |
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113 static T foo (0); |
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114 return (r == c) ? Array<T>::xelem (r) : foo; |
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115 } |
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116 |
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117 template <class T> |
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118 T |
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119 DiagArray2<T>::xelem (int r, int c) const |
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120 { |
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121 return (r == c) ? Array<T>::xelem (r) : T (0); |
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122 } |
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123 |
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124 template <class T> |
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125 void |
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126 DiagArray2<T>::resize (int r, int c) |
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127 { |
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128 if (r < 0 || c < 0) |
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129 { |
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130 (*current_liboctave_error_handler) ("can't resize to negative dimensions"); |
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131 return; |
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132 } |
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133 |
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134 if (r == dim1 () && c == dim2 ()) |
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135 return; |
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136 |
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137 typename Array<T>::ArrayRep *old_rep = Array<T>::rep; |
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138 const T *old_data = data (); |
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139 int old_len = length (); |
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140 |
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141 int new_len = r < c ? r : c; |
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142 |
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143 Array<T>::rep = new typename Array<T>::ArrayRep (new_len); |
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144 |
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145 dimensions = dim_vector (r, c); |
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146 |
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147 if (old_data && old_len > 0) |
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148 { |
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149 int min_len = old_len < new_len ? old_len : new_len; |
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150 |
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151 for (int i = 0; i < min_len; i++) |
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152 xelem (i, i) = old_data[i]; |
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153 } |
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154 |
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155 if (--old_rep->count <= 0) |
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156 delete old_rep; |
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157 } |
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158 |
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159 template <class T> |
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160 void |
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161 DiagArray2<T>::resize (int r, int c, const T& val) |
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162 { |
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163 if (r < 0 || c < 0) |
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164 { |
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165 (*current_liboctave_error_handler) ("can't resize to negative dimensions"); |
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166 return; |
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167 } |
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168 |
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169 if (r == dim1 () && c == dim2 ()) |
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170 return; |
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171 |
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172 typename Array<T>::ArrayRep *old_rep = Array<T>::rep; |
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173 const T *old_data = data (); |
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174 int old_len = length (); |
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175 |
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176 int new_len = r < c ? r : c; |
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177 |
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178 Array<T>::rep = new typename Array<T>::ArrayRep (new_len); |
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179 |
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180 dimensions = dim_vector (r, c); |
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181 |
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182 int min_len = old_len < new_len ? old_len : new_len; |
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183 |
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184 if (old_data && old_len > 0) |
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185 { |
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186 for (int i = 0; i < min_len; i++) |
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187 xelem (i, i) = old_data[i]; |
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188 } |
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189 |
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190 for (int i = min_len; i < new_len; i++) |
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191 xelem (i, i) = val; |
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192 |
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193 if (--old_rep->count <= 0) |
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194 delete old_rep; |
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195 } |
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196 |
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197 /* |
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198 ;;; Local Variables: *** |
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199 ;;; mode: C++ *** |
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200 ;;; End: *** |
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201 */ |
