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1 // Template array classes -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1993, 1994, 1995 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_Array_h) |
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25 #define octave_Array_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 #define HEAVYWEIGHT_INDEXING 1 |
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32 |
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33 #include <cassert> |
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34 #include <cstdlib> |
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35 |
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36 #include "lo-error.h" |
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37 |
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38 class idx_vector; |
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39 |
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238
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40 // Classes we declare. |
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41 |
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238
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42 template <class T> class Array; |
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43 template <class T> class Array2; |
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44 template <class T> class Array3; |
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45 |
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46 #ifndef NO_DIAG_ARRAY |
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47 template <class T> class DiagArray; |
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48 #endif |
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49 |
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50 // One dimensional array class. Handles the reference counting for |
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51 // all the derived classes. |
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52 |
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53 template <class T> |
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54 class Array |
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55 { |
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56 private: |
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57 |
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58 // The real representation of all arrays. |
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59 |
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60 class ArrayRep |
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61 { |
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62 public: |
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63 |
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64 T *data; |
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65 int len; |
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66 int count; |
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67 |
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68 ArrayRep& operator = (const ArrayRep& a); |
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69 |
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70 ArrayRep (T *d, int l) : data (d), len (l), count (1) { } |
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71 |
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72 ArrayRep (void) : data (0), len (0), count (1) { } |
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73 |
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74 ArrayRep (int n) : data (new T [n]), len (n), count (1) { } |
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75 |
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76 ArrayRep (const ArrayRep& a) |
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77 : data (new T [a.len]), len (a.len), count (1) |
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78 { |
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79 for (int i = 0; i < len; i++) |
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80 data[i] = a.data[i]; |
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81 } |
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82 |
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83 ~ArrayRep (void) { delete [] data; } |
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84 |
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85 int length (void) const { return len; } |
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86 |
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87 T& elem (int n) { return data[n]; } |
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88 |
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89 T elem (int n) const { return data[n]; } |
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90 |
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91 void qsort (int (*compare) (const void *, const void *)) |
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92 { |
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93 ::qsort (data, len, sizeof (T), compare); |
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94 } |
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95 }; |
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96 |
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97 #ifdef HEAVYWEIGHT_INDEXING |
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98 idx_vector *idx; |
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99 int max_indices; |
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100 int idx_count; |
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101 #endif |
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102 |
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103 protected: |
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104 |
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105 ArrayRep *rep; |
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106 |
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107 Array (T *d, int l) |
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108 { |
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109 rep = new ArrayRep (d, l); |
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110 |
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111 #ifdef HEAVYWEIGHT_INDEXING |
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112 idx = 0; |
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113 max_indices = 1; |
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114 idx_count = 0; |
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115 #endif |
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116 } |
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117 |
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118 public: |
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119 |
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120 Array (void) |
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121 { |
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122 rep = new ArrayRep (); |
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123 |
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124 #ifdef HEAVYWEIGHT_INDEXING |
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125 idx = 0; |
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126 max_indices = 1; |
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127 idx_count = 0; |
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128 #endif |
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129 } |
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130 |
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131 Array (int n) |
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132 { |
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133 rep = new ArrayRep (n); |
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134 |
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135 #ifdef HEAVYWEIGHT_INDEXING |
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136 idx = 0; |
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137 max_indices = 1; |
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138 idx_count = 0; |
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139 #endif |
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140 } |
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141 |
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142 Array (int n, const T& val); |
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143 |
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144 Array (const Array<T>& a) |
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145 { |
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146 rep = a.rep; |
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147 rep->count++; |
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148 |
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149 #ifdef HEAVYWEIGHT_INDEXING |
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150 max_indices = a.max_indices; |
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151 idx_count = 0; |
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152 idx = 0; |
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153 #endif |
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154 } |
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155 |
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156 ~Array (void); |
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157 |
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158 Array<T>& operator = (const Array<T>& a); |
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159 |
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160 int capacity (void) const { return rep->length (); } |
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161 int length (void) const { return rep->length (); } |
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162 |
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163 T& elem (int n) |
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164 { |
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165 if (rep->count > 1) |
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166 { |
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167 --rep->count; |
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168 rep = new ArrayRep (*rep); |
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169 } |
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170 return rep->elem (n); |
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171 } |
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172 |
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173 T& checkelem (int n); |
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174 T& operator () (int n) { return checkelem (n); } |
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175 |
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176 // No checking. |
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177 |
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178 T& xelem (int n) { return rep->elem (n); } |
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179 |
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180 T elem (int n) const; |
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181 T checkelem (int n) const; |
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182 T operator () (int n) const; |
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183 |
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184 void resize (int n); |
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185 void resize (int n, const T& val); |
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186 |
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187 const T *data (void) const { return rep->data; } |
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188 |
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189 T *fortran_vec (void); |
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190 |
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191 Array<T>& qsort (int (*compare) (const void *, const void *)) |
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192 { |
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193 if (rep->count > 1) |
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194 { |
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195 --rep->count; |
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196 rep = new ArrayRep (*rep); |
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197 } |
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198 |
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199 rep->qsort (compare); |
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200 |
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201 return *this; |
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202 } |
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203 |
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204 #ifdef HEAVYWEIGHT_INDEXING |
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205 void set_max_indices (int mi) { max_indices = mi; } |
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206 |
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207 void clear_index (void); |
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208 |
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209 void set_index (const idx_vector& i); |
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210 |
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211 int index_count (void) const { return idx_count; } |
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212 |
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213 idx_vector *get_idx (void) const { return idx; } |
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214 |
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215 void maybe_delete_elements (idx_vector& i); |
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216 |
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217 Array<T> value (void); |
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218 #endif |
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228
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219 }; |
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220 |
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221 template <class LT, class RT> |
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222 int assign (Array<LT>& lhs, const Array<RT>& rhs); |
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223 |
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224 // Two dimensional array class. |
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225 |
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226 template <class T> |
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227 class Array2 : public Array<T> |
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228 { |
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229 protected: |
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230 |
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231 Array2 (T *d, int n, int m) : Array<T> (d, n*m) |
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232 { |
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233 d1 = n; |
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234 d2 = m; |
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235 set_max_indices (2); |
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236 } |
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237 |
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238 public: |
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239 |
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240 // These really need to be protected (and they will be in the |
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241 // future, so don't depend on them being here!), but they can't be |
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242 // until template friends work correctly in g++. |
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243 |
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244 int d1; |
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245 int d2; |
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246 |
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247 Array2 (void) : Array<T> () |
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248 { |
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249 d1 = 0; |
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250 d2 = 0; |
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251 set_max_indices (2); |
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252 } |
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253 |
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254 Array2 (int n, int m) : Array<T> (n*m) |
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255 { |
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256 d1 = n; |
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257 d2 = m; |
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258 set_max_indices (2); |
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259 } |
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260 |
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261 Array2 (int n, int m, const T& val) : Array<T> (n*m, val) |
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262 { |
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263 d1 = n; |
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264 d2 = m; |
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265 set_max_indices (2); |
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266 } |
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267 |
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268 Array2 (const Array2<T>& a) : Array<T> (a) |
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269 { |
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270 d1 = a.d1; |
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271 d2 = a.d2; |
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272 set_max_indices (2); |
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273 } |
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274 |
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275 Array2 (const Array<T>& a, int n, int m) : Array<T> (a) |
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276 { |
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277 d1 = n; |
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278 d2 = m; |
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279 set_max_indices (2); |
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280 } |
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281 |
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282 #ifndef NO_DIAG_ARRAY |
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283 Array2 (const DiagArray<T>& a) : Array<T> (a.rows () * a.cols (), T (0)) |
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284 { |
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285 for (int i = 0; i < a.length (); i++) |
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286 elem (i, i) = a.elem (i, i); |
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287 |
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288 set_max_indices (2); |
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289 } |
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290 #endif |
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291 |
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292 ~Array2 (void) { } |
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293 |
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294 Array2<T>& operator = (const Array2<T>& a) |
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295 { |
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296 if (this != &a && rep != a.rep) |
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297 { |
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298 Array<T>::operator = (a); |
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299 d1 = a.d1; |
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300 d2 = a.d2; |
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301 } |
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302 |
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303 return *this; |
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304 } |
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305 |
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306 int dim1 (void) const { return d1; } |
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307 int dim2 (void) const { return d2; } |
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308 |
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309 int rows (void) const { return d1; } |
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310 int cols (void) const { return d2; } |
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311 int columns (void) const { return d2; } |
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312 |
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313 T& elem (int i, int j) { return Array<T>::elem (d1*j+i); } |
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238
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314 T& checkelem (int i, int j); |
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315 T& operator () (int i, int j) { return checkelem (i, j); } |
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316 |
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317 // No checking. |
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318 |
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319 T& xelem (int i, int j) { return Array<T>::xelem (d1*j+i); } |
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320 |
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321 T elem (int i, int j) const; |
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322 T checkelem (int i, int j) const; |
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323 T operator () (int i, int j) const; |
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324 |
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325 void resize (int n, int m); |
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326 void resize (int n, int m, const T& val); |
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327 |
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328 Array2<T>& insert (const Array2<T>& a, int r, int c); |
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329 |
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330 #ifdef HEAVYWEIGHT_INDEXING |
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331 void maybe_delete_elements (idx_vector& i, idx_vector& j); |
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332 |
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333 Array2<T> value (void); |
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334 #endif |
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335 }; |
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336 |
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337 template <class LT, class RT> |
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338 int assign (Array2<LT>& lhs, const Array2<RT>& rhs); |
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339 |
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340 // Three dimensional array class. |
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341 |
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342 template <class T> |
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343 class Array3 : public Array2<T> |
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344 { |
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345 protected: |
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346 |
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347 int d3; |
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348 |
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349 Array3 (T *d, int n, int m, int k) : Array2<T> (d, n, m*k) |
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350 { |
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351 d2 = m; |
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352 d3 = k; |
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353 set_max_indices (3); |
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354 } |
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355 |
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356 public: |
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357 |
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358 Array3 (void) : Array2<T> () |
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359 { |
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360 d2 = 0; |
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361 d3 = 0; |
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362 set_max_indices (3); |
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363 } |
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364 |
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365 Array3 (int n, int m, int k) : Array2<T> (n, m*k) |
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366 { |
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367 d2 = m; |
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368 d3 = k; |
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369 set_max_indices (3); |
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370 } |
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371 |
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372 Array3 (int n, int m, int k, const T& val) : Array2<T> (n, m*k, val) |
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373 { |
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374 d2 = m; |
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375 d3 = k; |
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376 set_max_indices (3); |
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377 } |
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378 |
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379 Array3 (const Array3<T>& a) : Array2<T> (a) |
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380 { |
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381 d2 = a.d2; |
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382 d3 = a.d3; |
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383 set_max_indices (3); |
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384 } |
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385 |
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386 ~Array3 (void) { } |
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387 |
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388 Array3<T>& operator = (const Array3<T>& a) |
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389 { |
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390 if (this != &a && rep != a.rep) |
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391 { |
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392 Array<T>::operator = (a); |
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393 d1 = a.d1; |
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394 d2 = a.d2; |
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395 d3 = a.d3; |
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396 } |
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397 |
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398 return *this; |
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399 } |
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400 |
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401 int dim3 (void) const { return d3; } |
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402 |
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403 T& elem (int i, int j, int k) { return Array2<T>::elem (i, d2*k+j); } |
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238
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404 T& checkelem (int i, int j, int k); |
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405 T& operator () (int i, int j, int k) { return checkelem (i, j, k); } |
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238
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406 |
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407 // No checking. |
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408 |
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409 T& xelem (int i, int j, int k) { return Array2<T>::xelem (i, d2*k+j); } |
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238
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410 |
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228
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411 T elem (int i, int j, int k) const; |
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238
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412 T checkelem (int i, int j, int k) const; |
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413 T operator () (int i, int j, int k) const; |
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228
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414 |
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238
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415 void resize (int n, int m, int k); |
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416 void resize (int n, int m, int k, const T& val); |
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417 |
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418 #ifdef HEAVYWEIGHT_INDEXING |
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419 void maybe_delete_elements (idx_vector& i, idx_vector& j, idx_vector& k); |
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420 |
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421 Array3<T> value (void); |
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422 #endif |
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228
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423 }; |
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424 |
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425 template <class LT, class RT> |
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426 int assign (Array3<LT>& lhs, const Array3<RT>& rhs); |
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427 |
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428 // A two-dimensional array with diagonal elements only. |
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429 // |
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430 // Idea and example code for Proxy class and functions from: |
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431 // |
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432 // From: kanze@us-es.sel.de (James Kanze) |
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433 // Subject: Re: How to overload [] to do READ/WRITE differently ? |
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434 // Message-ID: <KANZE.93Nov29151407@slsvhdt.us-es.sel.de> |
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435 // Sender: news@us-es.sel.de |
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436 // Date: 29 Nov 1993 14:14:07 GMT |
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437 // -- |
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438 // James Kanze email: kanze@us-es.sel.de |
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439 // GABI Software, Sarl., 8 rue du Faisan, F-67000 Strasbourg, France |
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238
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440 |
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441 #ifndef NO_DIAG_ARRAY |
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228
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442 template <class T> |
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443 class DiagArray : public Array<T> |
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444 { |
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366
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445 private: |
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446 T get (int i) { return Array<T>::elem (i); } |
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447 void set (const T& val, int i) { Array<T>::elem (i) = val; } |
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366
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448 |
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319
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449 class Proxy |
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450 { |
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451 public: |
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452 |
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453 Proxy (DiagArray<T> *ref, int r, int c) |
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645
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454 : i (r), j (c), object (ref) { } |
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319
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455 |
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456 const Proxy& operator = (const T& val) const |
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457 { |
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458 if (i == j) |
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459 { |
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460 if (object) |
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461 object->set (val, i); |
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462 } |
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463 else |
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464 (*current_liboctave_error_handler) ("invalid assignment to off-diagonal in diagonal array"); |
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319
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465 |
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1560
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466 return *this; |
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467 } |
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319
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468 |
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1560
|
469 operator T () const |
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470 { |
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471 if (object && i == j) |
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472 return object->get (i); |
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473 else |
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474 { |
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475 static T foo (0); |
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476 return foo; |
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477 } |
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478 } |
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319
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479 |
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480 private: |
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481 |
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1359
|
482 // XXX FIXME XXX -- this is declared private to keep the user from |
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483 // taking the address of a Proxy. Maybe it should be implemented |
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484 // by means of a companion function in the DiagArray class. |
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319
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485 |
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1560
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486 T *operator& () const { assert (0); return (T *) 0; } |
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319
|
487 |
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488 int i; |
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489 int j; |
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490 |
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491 DiagArray<T> *object; |
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492 |
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493 }; |
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494 |
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495 friend class Proxy; |
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496 |
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238
|
497 protected: |
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498 |
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499 int nr; |
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500 int nc; |
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501 |
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1550
|
502 DiagArray (T *d, int r, int c) : Array<T> (d, r < c ? r : c) |
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503 { |
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504 nr = r; |
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|
505 nc = c; |
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1560
|
506 set_max_indices (2); |
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1550
|
507 } |
|
238
|
508 |
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228
|
509 public: |
|
238
|
510 |
|
1550
|
511 DiagArray (void) : Array<T> () |
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|
512 { |
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|
513 nr = 0; |
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|
514 nc = 0; |
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1560
|
515 set_max_indices (2); |
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1550
|
516 } |
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|
517 |
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|
518 DiagArray (int n) : Array<T> (n) |
|
1560
|
519 { |
|
|
520 nr = n; |
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|
521 nc = n; |
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|
522 set_max_indices (2); |
|
|
523 } |
|
1550
|
524 |
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|
525 DiagArray (int n, const T& val) : Array<T> (n, val) |
|
1560
|
526 { |
|
|
527 nr = n; |
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|
528 nc = n; |
|
|
529 set_max_indices (2); |
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|
530 } |
|
1550
|
531 |
|
|
532 DiagArray (int r, int c) : Array<T> (r < c ? r : c) |
|
1560
|
533 { |
|
|
534 nr = r; |
|
|
535 nc = c; |
|
|
536 set_max_indices (2); |
|
|
537 } |
|
1550
|
538 |
|
|
539 DiagArray (int r, int c, const T& val) : Array<T> (r < c ? r : c, val) |
|
1560
|
540 { |
|
|
541 nr = r; |
|
|
542 nc = c; |
|
|
543 set_max_indices (2); |
|
|
544 } |
|
1550
|
545 |
|
|
546 DiagArray (const Array<T>& a) : Array<T> (a) |
|
1560
|
547 { |
|
|
548 nr = nc = a.length (); |
|
|
549 set_max_indices (2); |
|
|
550 } |
|
1550
|
551 |
|
|
552 DiagArray (const DiagArray<T>& a) : Array<T> (a) |
|
1560
|
553 { |
|
|
554 nr = a.nr; |
|
|
555 nc = a.nc; |
|
|
556 set_max_indices (2); |
|
|
557 } |
|
228
|
558 |
|
1230
|
559 ~DiagArray (void) { } |
|
|
560 |
|
1550
|
561 DiagArray<T>& operator = (const DiagArray<T>& a) |
|
|
562 { |
|
1560
|
563 if (this != &a) |
|
|
564 { |
|
|
565 Array<T>::operator = (a); |
|
|
566 nr = a.nr; |
|
|
567 nc = a.nc; |
|
|
568 } |
|
|
569 |
|
|
570 return *this; |
|
1550
|
571 } |
|
228
|
572 |
|
1550
|
573 int dim1 (void) const { return nr; } |
|
|
574 int dim2 (void) const { return nc; } |
|
|
575 |
|
|
576 int rows (void) const { return nr; } |
|
|
577 int cols (void) const { return nc; } |
|
|
578 int columns (void) const { return nc; } |
|
228
|
579 |
|
880
|
580 #if 0 |
|
1560
|
581 Proxy elem (int r, int c) |
|
|
582 { |
|
|
583 return Proxy (this, r, c); |
|
|
584 } |
|
319
|
585 |
|
1560
|
586 Proxy checkelem (int r, int c) |
|
|
587 { |
|
|
588 if (r < 0 || c < 0 || r >= nr || c >= nc) |
|
|
589 { |
|
|
590 (*current_liboctave_error_handler) ("range error"); |
|
|
591 return Proxy (0, r, c); |
|
|
592 } |
|
|
593 else |
|
|
594 return Proxy (this, r, c); |
|
|
595 } |
|
319
|
596 |
|
1560
|
597 Proxy operator () (int r, int c) |
|
|
598 { |
|
|
599 if (r < 0 || c < 0 || r >= nr || c >= nc) |
|
|
600 { |
|
|
601 (*current_liboctave_error_handler) ("range error"); |
|
|
602 return Proxy (0, r, c); |
|
|
603 } |
|
|
604 else |
|
|
605 return Proxy (this, r, c); |
|
319
|
606 } |
|
880
|
607 #else |
|
|
608 T& elem (int r, int c); |
|
|
609 T& checkelem (int r, int c); |
|
|
610 T& operator () (int r, int c); |
|
344
|
611 #endif |
|
228
|
612 |
|
1359
|
613 // No checking. |
|
|
614 |
|
238
|
615 T& xelem (int r, int c); |
|
|
616 |
|
228
|
617 T elem (int r, int c) const; |
|
|
618 T checkelem (int r, int c) const; |
|
|
619 T operator () (int r, int c) const; |
|
|
620 |
|
238
|
621 void resize (int n, int m); |
|
|
622 void resize (int n, int m, const T& val); |
|
1560
|
623 |
|
|
624 void maybe_delete_elements (idx_vector& i, idx_vector& j); |
|
228
|
625 }; |
|
1574
|
626 #endif |
|
228
|
627 |
|
|
628 #endif |
|
|
629 |
|
|
630 /* |
|
|
631 ;;; Local Variables: *** |
|
|
632 ;;; mode: C++ *** |
|
|
633 ;;; page-delimiter: "^/\\*" *** |
|
|
634 ;;; End: *** |
|
|
635 */ |
