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1993
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1 // Template array classes |
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1988
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2 /* |
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3 |
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4 Copyright (C) 1996 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, 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 (octave_Array2_h) |
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25 #define octave_Array2_h 1 |
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26 |
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27 #if defined (__GNUG__) |
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28 #pragma interface |
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29 #endif |
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30 |
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31 #include <cassert> |
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32 #include <cstdlib> |
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33 |
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34 #include "Array.h" |
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35 #include "lo-error.h" |
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36 |
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37 class idx_vector; |
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38 |
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39 // Two dimensional array class. |
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40 |
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41 template <class T> |
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42 class Array2 : public Array<T> |
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43 { |
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44 protected: |
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45 |
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46 Array2 (T *d, int n, int m) : Array<T> (d, n*m) |
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47 { |
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48 d1 = n; |
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49 d2 = m; |
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50 set_max_indices (2); |
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51 } |
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52 |
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53 public: |
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54 |
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55 // These really need to be protected (and they will be in the |
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56 // future, so don't depend on them being here!), but they can't be |
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57 // until template friends work correctly in g++. |
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58 |
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59 int d1; |
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60 int d2; |
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61 |
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62 Array2 (void) : Array<T> () |
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63 { |
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64 d1 = 0; |
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65 d2 = 0; |
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66 set_max_indices (2); |
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67 } |
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68 |
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69 Array2 (int n, int m) : Array<T> (n*m) |
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70 { |
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71 d1 = n; |
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72 d2 = m; |
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73 set_max_indices (2); |
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74 } |
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75 |
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76 Array2 (int n, int m, const T& val) : Array<T> (n*m, val) |
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77 { |
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78 d1 = n; |
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79 d2 = m; |
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80 set_max_indices (2); |
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81 } |
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82 |
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83 Array2 (const Array2<T>& a) : Array<T> (a) |
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84 { |
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85 d1 = a.d1; |
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86 d2 = a.d2; |
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87 set_max_indices (2); |
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88 } |
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89 |
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90 Array2 (const Array<T>& a, int n, int m) : Array<T> (a) |
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91 { |
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92 d1 = n; |
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93 d2 = m; |
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94 set_max_indices (2); |
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95 } |
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96 |
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97 ~Array2 (void) { } |
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98 |
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99 Array2<T>& operator = (const Array2<T>& a) |
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100 { |
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101 if (this != &a && rep != a.rep) |
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102 { |
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103 Array<T>::operator = (a); |
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104 d1 = a.d1; |
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105 d2 = a.d2; |
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106 } |
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107 |
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108 return *this; |
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109 } |
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110 |
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111 int dim1 (void) const { return d1; } |
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112 int dim2 (void) const { return d2; } |
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113 |
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114 int rows (void) const { return d1; } |
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115 int cols (void) const { return d2; } |
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116 int columns (void) const { return d2; } |
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117 |
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2109
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118 // No checking of any kind, ever. |
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119 |
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120 T& xelem (int i, int j) { return Array<T>::xelem (d1*j+i); } |
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121 T xelem (int i, int j) const { return Array<T>::xelem (d1*j+i); } |
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122 |
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123 // Note that the following element selection methods don't use |
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124 // xelem() because they need to make use of the code in |
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125 // Array<T>::elem() that checks the reference count. |
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126 |
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127 T& checkelem (int i, int j) |
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128 { |
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129 if (i < 0 || j < 0 || i >= d1 || j >= d2) |
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130 { |
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2109
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131 (*current_liboctave_error_handler) |
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132 ("T& Array2<T>::checkelem (%d, %d): range error", i, j); |
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133 static T foo; |
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134 return foo; |
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135 } |
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136 else |
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137 return Array<T>::elem (d1*j+i); |
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138 } |
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139 |
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140 T& elem (int i, int j) { return Array<T>::elem (d1*j+i); } |
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141 |
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2109
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142 #if defined (BOUNDS_CHECKING) |
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143 T& operator () (int i, int j) { return checkelem (i, j); } |
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144 #else |
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145 T& operator () (int i, int j) { return elem (i, j); } |
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146 #endif |
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147 |
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148 T checkelem (int i, int j) const |
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149 { |
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150 if (i < 0 || j < 0 || i >= d1 || j >= d2) |
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151 { |
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2109
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152 (*current_liboctave_error_handler) |
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153 ("T Array2<T>::checkelem (%d, %d): range error", i, j); |
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2006
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154 T foo; |
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155 static T *bar = &foo; |
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156 return foo; |
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157 } |
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158 else |
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2109
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159 return Array<T>::elem (d1*j+i); |
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2006
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160 } |
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1988
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161 |
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2306
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162 T elem (int i, int j) const { return Array<T>::elem (d1*j+i); } |
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163 |
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164 #if defined (BOUNDS_CHECKING) |
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165 T operator () (int i, int j) const { return checkelem (i, j); } |
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166 #else |
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167 T operator () (int i, int j) const { return elem (i, j); } |
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168 #endif |
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169 |
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2109
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170 T range_error (const char *fcn, int i, int j) const; |
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171 T& range_error (const char *fcn, int i, int j); |
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1988
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172 |
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173 void resize (int n, int m); |
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174 void resize (int n, int m, const T& val); |
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175 |
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176 Array2<T>& insert (const Array2<T>& a, int r, int c); |
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177 |
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178 #ifdef HEAVYWEIGHT_INDEXING |
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179 void maybe_delete_elements (idx_vector& i, idx_vector& j); |
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180 |
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181 Array2<T> value (void); |
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182 #endif |
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183 }; |
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184 |
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185 template <class LT, class RT> |
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186 int assign (Array2<LT>& lhs, const Array2<RT>& rhs); |
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187 |
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188 #endif |
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189 |
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190 /* |
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191 ;;; Local Variables: *** |
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192 ;;; mode: C++ *** |
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193 ;;; End: *** |
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194 */ |
