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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, 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 <climits> |
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33 #include <cmath> |
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34 #include <cstdlib> |
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35 |
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36 #include "Array.h" |
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37 #include "lo-error.h" |
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38 |
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39 class idx_vector; |
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40 |
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41 // Two dimensional array class. |
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42 |
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43 template <class T> |
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44 class Array2 : public Array<T> |
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45 { |
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46 private: |
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47 |
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48 int get_size (int r, int c) const; |
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49 |
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50 protected: |
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51 |
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52 Array2 (T *d, int n, int m) : Array<T> (d, get_size (n, m)) |
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53 { |
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54 d1 = n; |
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55 d2 = m; |
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56 set_max_indices (2); |
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57 } |
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58 |
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59 public: |
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60 |
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61 // These really need to be protected (and they will be in the |
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62 // future, so don't depend on them being here!), but they can't be |
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63 // until template friends work correctly in g++. |
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64 |
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65 int d1; |
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66 int d2; |
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67 |
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68 Array2 (void) : Array<T> () |
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69 { |
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70 d1 = 0; |
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71 d2 = 0; |
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72 set_max_indices (2); |
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73 } |
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74 |
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75 Array2 (int n, int m) : Array<T> (get_size (n, m)) |
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76 { |
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77 d1 = n; |
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78 d2 = m; |
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79 set_max_indices (2); |
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80 } |
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81 |
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82 Array2 (int n, int m, const T& val) : Array<T> (get_size (n, m), val) |
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83 { |
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84 d1 = n; |
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85 d2 = m; |
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86 set_max_indices (2); |
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87 } |
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88 |
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89 Array2 (const Array2<T>& a) : Array<T> (a) |
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90 { |
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91 d1 = a.d1; |
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92 d2 = a.d2; |
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93 set_max_indices (2); |
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94 } |
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95 |
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96 Array2 (const Array<T>& a, int n, int m) : Array<T> (a) |
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97 { |
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98 d1 = n; |
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99 d2 = m; |
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100 set_max_indices (2); |
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101 } |
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102 |
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103 ~Array2 (void) { } |
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104 |
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105 Array2<T>& operator = (const Array2<T>& a) |
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106 { |
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107 if (this != &a && rep != a.rep) |
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108 { |
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109 Array<T>::operator = (a); |
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110 d1 = a.d1; |
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111 d2 = a.d2; |
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112 } |
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113 |
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114 return *this; |
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115 } |
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116 |
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117 int dim1 (void) const { return d1; } |
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118 int dim2 (void) const { return d2; } |
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119 |
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120 int rows (void) const { return d1; } |
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121 int cols (void) const { return d2; } |
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122 int columns (void) const { return d2; } |
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123 |
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124 // No checking of any kind, ever. |
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125 |
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126 T& xelem (int i, int j) { return Array<T>::xelem (d1*j+i); } |
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127 T xelem (int i, int j) const { return Array<T>::xelem (d1*j+i); } |
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128 |
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129 // Note that the following element selection methods don't use |
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130 // xelem() because they need to make use of the code in |
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131 // Array<T>::elem() that checks the reference count. |
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132 |
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133 T& checkelem (int i, int j) |
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134 { |
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135 if (i < 0 || j < 0 || i >= d1 || j >= d2) |
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136 { |
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137 (*current_liboctave_error_handler) |
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138 ("T& Array2<T>::checkelem (%d, %d): range error", i, j); |
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139 static T foo; |
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140 return foo; |
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141 } |
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142 else |
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143 return Array<T>::elem (d1*j+i); |
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144 } |
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145 |
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146 T& elem (int i, int j) { return Array<T>::elem (d1*j+i); } |
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147 |
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148 #if defined (BOUNDS_CHECKING) |
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149 T& operator () (int i, int j) { return checkelem (i, j); } |
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150 #else |
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151 T& operator () (int i, int j) { return elem (i, j); } |
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152 #endif |
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153 |
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154 T checkelem (int i, int j) const |
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155 { |
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156 if (i < 0 || j < 0 || i >= d1 || j >= d2) |
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157 { |
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158 (*current_liboctave_error_handler) |
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159 ("T Array2<T>::checkelem (%d, %d): range error", i, j); |
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160 return T (); |
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161 } |
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162 else |
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163 return Array<T>::elem (d1*j+i); |
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164 } |
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165 |
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166 T elem (int i, int j) const { return Array<T>::elem (d1*j+i); } |
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167 |
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168 #if defined (BOUNDS_CHECKING) |
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169 T operator () (int i, int j) const { return checkelem (i, j); } |
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170 #else |
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171 T operator () (int i, int j) const { return elem (i, j); } |
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172 #endif |
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173 |
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174 T range_error (const char *fcn, int i, int j) const; |
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175 T& range_error (const char *fcn, int i, int j); |
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176 |
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177 void resize (int n, int m); |
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178 void resize (int n, int m, const T& val); |
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179 |
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180 Array2<T>& insert (const Array2<T>& a, int r, int c); |
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181 |
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182 bool is_square (void) const { return (d1 == d2); } |
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183 |
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184 Array2<T> transpose (void) const; |
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185 |
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186 #ifdef HEAVYWEIGHT_INDEXING |
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187 void maybe_delete_elements (idx_vector& i); |
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188 |
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189 void maybe_delete_elements (idx_vector& i, idx_vector& j); |
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190 |
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191 Array2<T> value (void); |
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192 |
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193 Array2<T> index (idx_vector& i) const; |
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194 |
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195 Array2<T> index (idx_vector& i, idx_vector& j) const; |
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196 #endif |
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197 }; |
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198 |
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199 template <class LT, class RT> |
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200 int assign (Array2<LT>& lhs, const Array2<RT>& rhs); |
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201 |
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202 #endif |
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203 |
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204 /* |
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205 ;;; Local Variables: *** |
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206 ;;; mode: C++ *** |
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207 ;;; End: *** |
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208 */ |
