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4588
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1 /* |
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2 |
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3 Copyright (C) 2003 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include "Array-util.h" |
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28 |
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29 bool |
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30 index_in_bounds (const Array<int>& ra_idx, const dim_vector& dimensions) |
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31 { |
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32 bool retval = true; |
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33 |
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34 int n = ra_idx.length (); |
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35 |
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36 if (n == dimensions.length ()) |
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37 { |
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38 for (int i = 0; i < n; i++) |
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39 { |
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40 if (ra_idx(i) < 0 || ra_idx(i) > dimensions (i)) |
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41 { |
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42 retval = false; |
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43 break; |
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44 } |
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45 } |
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46 } |
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47 else |
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48 retval = false; |
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49 |
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50 return retval; |
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51 } |
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52 |
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53 void |
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54 increment_index (Array<int>& ra_idx, const dim_vector& dimensions, |
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55 int start_dimension) |
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56 { |
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57 ra_idx(start_dimension)++; |
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58 |
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59 int n = ra_idx.length () - 1; |
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60 |
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61 for (int i = start_dimension; i < n; i++) |
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62 { |
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63 if (ra_idx(i) < dimensions(i)) |
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64 break; |
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65 else |
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66 { |
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67 ra_idx(i) = 0; |
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68 ra_idx(i+1)++; |
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69 } |
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70 } |
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71 } |
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72 |
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73 int |
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74 get_scalar_idx (Array<int>& idx, dim_vector& dims) |
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75 { |
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76 int retval (-1); |
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77 |
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78 int n = idx.length (); |
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79 |
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80 if (n > 0) |
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81 { |
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82 retval = idx(--n); |
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83 |
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84 while (--n >= 0) |
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85 { |
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86 retval *= dims (n); |
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87 |
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88 retval += idx(n); |
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89 } |
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90 } |
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91 return retval; |
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92 } |
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93 |
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94 int |
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95 num_ones (const Array<int>& ra_idx) |
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96 { |
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97 int retval (0); |
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98 for (int i = 0; i < ra_idx.length (); i++) |
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99 { |
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100 if (ra_idx (i) == 1) |
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101 retval++; |
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102 } |
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103 return retval; |
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104 } |
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105 |
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106 bool |
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107 is_scalar (const dim_vector& dim) |
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108 { |
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109 bool retval = true; |
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110 |
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111 int n = dim.length (); |
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112 |
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113 if (n == 0) |
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114 { |
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115 retval = false; |
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116 } |
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117 else |
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118 { |
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119 for (int i = 0; i < n; i ++) |
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120 { |
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121 if (dim (i) != 1) |
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122 { |
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123 retval = false; |
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124 |
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125 break; |
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126 } |
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127 } |
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128 } |
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129 return retval; |
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130 } |
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131 |
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132 bool |
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133 any_ones (const Array<int>& arr) |
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134 { |
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135 bool retval = false; |
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136 |
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137 for (int i = 0; i < arr.length (); i++) |
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138 { |
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139 if (arr (i) == 1) |
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140 { |
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141 retval = true; |
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142 |
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143 break; |
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144 } |
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145 } |
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146 return retval; |
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147 } |
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148 |
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149 int |
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150 compute_index (const Array<int>& ra_idx, const dim_vector& dims) |
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151 { |
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152 int retval = -1; |
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153 |
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154 int n = dims.length (); |
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155 |
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156 if (n > 0 && n == ra_idx.length ()) |
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157 { |
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158 retval = ra_idx(--n); |
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159 |
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160 while (--n >= 0) |
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161 { |
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162 retval *= dims(n); |
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163 |
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164 retval += ra_idx(n); |
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165 } |
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166 } |
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167 else |
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168 (*current_liboctave_error_handler) |
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169 ("ArrayN<T>::compute_index: invalid ra_idxing operation"); |
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170 |
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171 return retval; |
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172 } |
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173 |
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174 Array<int> |
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175 conv_to_int_array (const Array<idx_vector>& a) |
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176 { |
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177 Array<int> retval (a.length ()); |
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178 |
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179 for (int i = 0; i < a.length (); i++) |
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180 retval (i) = a(i).elem (0); |
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181 |
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182 return retval; |
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183 } |
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184 |
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185 Array<idx_vector> |
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186 conv_to_array (const idx_vector *tmp, const int len) |
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187 { |
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188 Array<idx_vector> retval (len); |
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189 |
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190 for (int i = 0; i < len; i++) |
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191 retval (i) = tmp[i]; |
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192 |
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193 return retval; |
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194 } |
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195 |
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196 dim_vector |
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197 freeze (Array<idx_vector>& ra_idx, const dim_vector& dimensions, int resize_ok) |
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198 { |
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199 dim_vector retval; |
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200 |
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201 int n = ra_idx.length (); |
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202 |
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203 assert (n == dimensions.length ()); |
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204 |
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205 retval.resize (n); |
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206 |
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207 for (int i = 0; i < n; i++) |
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208 retval(i) = ra_idx(i).freeze (dimensions(i), "XXX FIXME XXX", resize_ok); |
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209 |
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210 return retval; |
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211 } |
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212 |
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213 bool |
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214 vector_equivalent (const Array<int>& ra_idx) |
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215 { |
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216 int n = ra_idx.length (); |
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217 |
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218 bool found_first = false; |
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219 |
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220 for (int i = 0; i < n; i++) |
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221 { |
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222 if (ra_idx(i) != 1) |
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223 { |
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224 if (! found_first) |
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225 found_first = true; |
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226 else |
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227 return false; |
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228 } |
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229 } |
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230 |
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231 return true; |
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232 } |
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233 |
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234 bool |
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235 equal_arrays (const dim_vector& a, const dim_vector& b) |
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236 { |
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237 bool retval = true; |
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238 |
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239 if (a.length () != b.length ()) |
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240 retval = false; |
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241 else |
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242 { |
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243 for (int i = 0; i < a.length (); i++) |
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244 { |
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245 if (a(i) != b(i)) |
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246 retval = false; |
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247 } |
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248 } |
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249 |
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250 return retval; |
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251 } |
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252 |
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253 bool |
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254 all_ok (const Array<idx_vector>& ra_idx) |
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255 { |
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256 bool retval = true; |
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257 |
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258 int n = ra_idx.length (); |
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259 |
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260 for (int i = 0; i < n; i++) |
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261 { |
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262 if (! ra_idx(i)) |
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263 { |
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264 retval = false; |
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265 break; |
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266 } |
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267 } |
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268 |
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269 return retval; |
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270 } |
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271 |
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272 bool |
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273 any_orig_empty (const Array<idx_vector>& ra_idx) |
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274 { |
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275 bool retval = false; |
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276 |
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277 int n = ra_idx.length (); |
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278 |
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279 for (int i = 0; i < n; i++) |
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280 { |
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281 if (ra_idx(i).orig_empty ()) |
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282 { |
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283 retval = true; |
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284 break; |
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285 } |
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286 } |
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287 |
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288 return retval; |
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289 } |
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290 |
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291 bool |
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292 any_zero_len (const dim_vector& frozen_lengths) |
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293 { |
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294 bool retval = false; |
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295 |
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296 int n = frozen_lengths.length (); |
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297 |
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298 for (int i = 0; i < n; i++) |
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299 { |
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300 if (frozen_lengths(i) == 0) |
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301 { |
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302 retval = true; |
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303 break; |
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304 } |
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305 } |
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306 |
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307 return retval; |
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308 } |
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309 |
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310 dim_vector |
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311 get_zero_len_size (const dim_vector& frozen_lengths, |
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312 const dim_vector& dimensions) |
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313 { |
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314 dim_vector retval; |
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315 assert (0); |
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316 return retval; |
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317 } |
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318 |
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319 bool |
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320 all_colon_equiv (const Array<idx_vector>& ra_idx, |
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321 const dim_vector& frozen_lengths) |
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322 { |
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323 bool retval = true; |
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324 |
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325 int idx_n = ra_idx.length (); |
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326 |
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327 int n = frozen_lengths.length (); |
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328 |
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329 assert (idx_n == n); |
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330 |
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331 for (int i = 0; i < n; i++) |
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332 { |
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333 if (! ra_idx(i).is_colon_equiv (frozen_lengths(i))) |
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334 { |
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335 retval = false; |
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336 break; |
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337 } |
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338 } |
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339 |
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340 return retval; |
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341 } |
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342 |
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343 bool |
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344 is_in (int num, const idx_vector& idx) |
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345 { |
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346 int n = idx.capacity (); |
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347 |
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348 for (int i = 0; i < n; i++) |
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349 if (idx.elem (i) == num) |
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350 return true; |
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351 |
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352 return false; |
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353 } |
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354 |
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355 int |
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356 how_many_lgt (const int num, idx_vector& idxv) |
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357 { |
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358 int retval = 0; |
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359 |
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360 int n = idxv.capacity (); |
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361 |
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362 for (int i = 0; i < n; i++) |
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363 { |
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364 if (num > idxv.elem (i)) |
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365 retval++; |
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366 } |
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367 |
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368 return retval; |
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369 } |
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370 |
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371 bool |
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372 all_ones (const Array<int>& arr) |
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373 { |
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374 bool retval = true; |
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375 |
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376 for (int i = 0; i < arr.length (); i++) |
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377 { |
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378 if (arr(i) != 1) |
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379 { |
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380 retval = false; |
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381 break; |
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382 } |
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383 } |
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384 |
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385 return retval; |
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386 } |
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387 |
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388 Array<int> |
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389 get_elt_idx (const Array<idx_vector>& ra_idx, const Array<int>& result_idx) |
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390 { |
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391 int n = ra_idx.length (); |
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392 |
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393 Array<int> retval (n); |
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394 |
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395 for (int i = 0; i < n; i++) |
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396 retval(i) = ra_idx(i).elem (result_idx(i)); |
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397 |
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398 return retval; |
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399 } |
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400 |
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401 int |
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402 number_of_elements (const dim_vector ra_idx) |
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403 { |
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404 int retval = 1; |
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405 |
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406 int n = ra_idx.length (); |
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407 |
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408 if (n == 0) |
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409 retval = 0; |
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410 |
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411 for (int i = 0; i < n; i++) |
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412 retval *= ra_idx(i); |
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413 |
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414 return retval; |
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415 } |
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416 |
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417 Array<int> |
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418 get_ra_idx (int idx, const dim_vector& dims) |
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419 { |
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420 Array<int> retval; |
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421 |
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422 int n_dims = dims.length (); |
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423 |
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424 retval.resize (n_dims); |
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425 |
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426 for (int i = 0; i < n_dims; i++) |
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427 retval(i) = 0; |
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428 |
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429 assert (idx > 0 || idx < number_of_elements (dims)); |
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430 |
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431 for (int i = 0; i < idx; i++) |
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432 increment_index (retval, dims); |
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433 |
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434 // XXX FIXME XXX -- the solution using increment_index is not |
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435 // efficient. |
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436 |
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437 #if 0 |
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438 int var = 1; |
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439 for (int i = 0; i < n_dims; i++) |
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440 { |
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441 std::cout << "idx: " << idx << ", var: " << var << ", dims(" << i << "): " << dims(i) <<"\n"; |
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442 retval(i) = ((int)floor(((idx) / (double)var))) % dims(i); |
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443 idx -= var * retval(i); |
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444 var = dims(i); |
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445 } |
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446 #endif |
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447 |
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448 return retval; |
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449 } |
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450 |
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451 dim_vector |
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452 short_freeze (Array<idx_vector>& ra_idx, const dim_vector& dimensions, |
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453 int resize_ok) |
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454 { |
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455 dim_vector retval; |
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456 |
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457 int n = ra_idx.length (); |
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458 |
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459 int n_dims = dimensions.length (); |
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460 |
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461 if (n == n_dims) |
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462 { |
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463 retval = freeze (ra_idx, dimensions, resize_ok); |
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464 } |
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465 else if (n < n_dims) |
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466 { |
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467 retval.resize (n); |
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468 |
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469 for (int i = 0; i < n - 1; i++) |
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470 retval(i) = ra_idx(i).freeze (dimensions(i), "dimension", resize_ok); |
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471 |
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472 int size_left = 1; |
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473 |
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474 for (int i = n - 1; i < n_dims; i++) |
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475 size_left *= dimensions(i); |
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476 |
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477 if (ra_idx(n-1).is_colon()) |
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478 { |
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479 retval(n-1) = size_left; |
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480 } |
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481 else |
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482 { |
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483 int last_ra_idx = ra_idx(n-1)(0); |
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484 |
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485 if (last_ra_idx < dimensions(n - 1)) |
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486 { |
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487 retval(n - 1) = ra_idx(n - 1).freeze (dimensions(n-1), |
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488 "dimension", resize_ok); |
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489 } |
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490 else |
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491 { |
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492 if (size_left <= last_ra_idx) |
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493 { |
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494 // Make it larger than it should be to get an error |
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495 // later. |
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496 |
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497 retval.resize(n_dims + 1); |
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498 |
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499 (*current_liboctave_error_handler) |
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500 ("index exceeds N-d array dimensions"); |
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501 } |
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502 else |
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503 { |
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504 retval(n-1) = 1; |
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505 } |
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506 } |
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507 } |
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508 } |
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509 |
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510 return retval; |
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511 } |
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512 |
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4593
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513 Array<int> |
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514 calc_permutated_idx (const Array<int>& old_idx, |
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515 const Array<int>& perm_vec, bool inv) |
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516 { |
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517 int n_el = old_idx.length (); |
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518 |
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519 Array<int> retval (n_el); |
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520 |
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521 for (int i = 0; i < n_el; i++) |
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522 { |
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523 if (inv) |
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524 retval(perm_vec(i)-1) = old_idx(i); |
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525 else |
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526 retval(i) = old_idx(perm_vec(i)-1); |
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527 } |
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528 |
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529 return retval; |
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530 } |
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531 |
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4588
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532 /* |
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533 ;;; Local Variables: *** |
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534 ;;; mode: C++ *** |
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535 ;;; End: *** |
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536 */ |
