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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 |
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45 Array2 : public Array<T> |
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46 { |
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47 protected: |
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48 |
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49 int get_size (int r, int c) const; |
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50 |
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51 Array2 (T *d, int n, int m) : Array<T> (d, get_size (n, m)) |
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52 { |
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53 d1 = n; |
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54 d2 = m; |
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55 set_max_indices (2); |
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56 } |
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57 |
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58 public: |
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59 |
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60 // These really need to be protected (and they will be in the |
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61 // future, so don't depend on them being here!), but they can't be |
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62 // until template friends work correctly in g++. |
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63 |
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64 int d1; |
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65 int d2; |
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66 |
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67 Array2 (void) : Array<T> () |
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68 { |
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69 d1 = 0; |
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70 d2 = 0; |
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71 set_max_indices (2); |
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72 } |
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73 |
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74 Array2 (int n, int m) : Array<T> (get_size (n, m)) |
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75 { |
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76 d1 = n; |
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77 d2 = m; |
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78 set_max_indices (2); |
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79 } |
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80 |
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81 Array2 (int n, int m, const T& val) : Array<T> (get_size (n, m), val) |
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82 { |
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83 d1 = n; |
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84 d2 = m; |
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85 set_max_indices (2); |
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86 } |
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87 |
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88 Array2 (const Array2<T>& a) : Array<T> (a) |
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89 { |
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90 d1 = a.d1; |
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91 d2 = a.d2; |
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92 set_max_indices (2); |
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93 } |
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94 |
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95 Array2 (const Array<T>& a, int n, int m) : Array<T> (a) |
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96 { |
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97 d1 = n; |
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98 d2 = m; |
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99 set_max_indices (2); |
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100 } |
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101 |
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102 ~Array2 (void) { } |
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103 |
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104 Array2<T>& operator = (const Array2<T>& a) |
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105 { |
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106 if (this != &a) |
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107 { |
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108 Array<T>::operator = (a); |
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109 d1 = a.d1; |
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110 d2 = a.d2; |
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111 } |
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112 |
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113 return *this; |
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114 } |
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115 |
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116 int dim1 (void) const { return d1; } |
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117 int dim2 (void) const { return d2; } |
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118 |
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119 int rows (void) const { return d1; } |
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120 int cols (void) const { return d2; } |
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121 int columns (void) const { return d2; } |
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122 |
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123 T range_error (const char *fcn, int i, int j) const; |
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124 T& range_error (const char *fcn, int i, int j); |
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125 |
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126 // No checking of any kind, ever. |
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127 |
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128 T& xelem (int i, int j) { return Array<T>::xelem (d1*j+i); } |
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129 T xelem (int i, int j) const { return Array<T>::xelem (d1*j+i); } |
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130 |
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131 // Note that the following element selection methods don't use |
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132 // xelem() because they need to make use of the code in |
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133 // Array<T>::elem() that checks the reference count. |
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134 |
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135 T& checkelem (int i, int j) |
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136 { |
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137 if (i < 0 || j < 0 || i >= d1 || j >= d2) |
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138 return range_error ("T& Array2<T>::checkelem", i, j); |
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139 else |
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140 return Array<T>::elem (d1*j+i); |
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141 } |
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142 |
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143 T& elem (int i, int j) { return Array<T>::elem (d1*j+i); } |
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144 |
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145 #if defined (BOUNDS_CHECKING) |
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146 T& operator () (int i, int j) { return checkelem (i, j); } |
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147 #else |
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148 T& operator () (int i, int j) { return elem (i, j); } |
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149 #endif |
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150 |
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151 T checkelem (int i, int j) const |
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152 { |
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153 if (i < 0 || j < 0 || i >= d1 || j >= d2) |
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154 return range_error ("T Array2<T>::checkelem", i, j); |
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155 else |
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156 return Array<T>::elem (d1*j+i); |
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157 } |
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158 |
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159 T elem (int i, int j) const { return Array<T>::elem (d1*j+i); } |
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160 |
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161 #if defined (BOUNDS_CHECKING) |
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162 T operator () (int i, int j) const { return checkelem (i, j); } |
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163 #else |
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164 T operator () (int i, int j) const { return elem (i, j); } |
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165 #endif |
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166 |
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167 void resize (int n, int m); |
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168 void resize (int n, int m, const T& val); |
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169 |
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170 Array2<T>& insert (const Array2<T>& a, int r, int c); |
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171 |
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172 bool is_square (void) const { return (d1 == d2); } |
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173 |
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174 Array2<T> transpose (void) const; |
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175 |
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176 #ifdef HEAVYWEIGHT_INDEXING |
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177 |
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178 void maybe_delete_elements (idx_vector& i); |
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179 |
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180 void maybe_delete_elements (idx_vector& i, idx_vector& j); |
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181 |
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182 Array2<T> value (void); |
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183 |
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184 Array2<T> index (idx_vector& i, int resize_ok = 0, |
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185 const T& rfv = Array<T>::resize_fill_value ()) const; |
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186 |
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187 Array2<T> index (idx_vector& i, idx_vector& j, int resize_ok = 0, |
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188 const T& rfv = Array<T>::resize_fill_value ()) const; |
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189 |
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190 #endif |
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191 |
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192 void print_info (std::ostream& os, const std::string& prefix) const; |
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193 }; |
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194 |
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195 template <class LT, class RT> |
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196 int |
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197 assign (Array2<LT>& lhs, const Array2<RT>& rhs, const LT& resize_fill_value); |
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198 |
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199 template <class LT, class RT> |
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200 int |
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201 assign (Array2<LT>& lhs, const Array2<RT>& rhs) |
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202 { |
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203 return assign (lhs, rhs, Array<LT>::resize_fill_value ()); |
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204 } |
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205 |
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206 #endif |
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207 |
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208 /* |
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209 ;;; Local Variables: *** |
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210 ;;; mode: C++ *** |
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211 ;;; End: *** |
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212 */ |
