1 | /* |
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2 | * SimpleArray_T.java |
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3 | * |
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4 | * Copyright (C) 2003-2007 Peter Graves |
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5 | * $Id: SimpleArray_T.java 12431 2010-02-08 08:05:15Z mevenson $ |
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6 | * |
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7 | * This program is free software; you can redistribute it and/or |
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8 | * modify it under the terms of the GNU General Public License |
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9 | * as published by the Free Software Foundation; either version 2 |
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10 | * of the License, or (at your option) any later version. |
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11 | * |
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12 | * This program is distributed in the hope that it will be useful, |
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 | * GNU General Public License 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 this program; if not, write to the Free Software |
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19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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20 | * |
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21 | * As a special exception, the copyright holders of this library give you |
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22 | * permission to link this library with independent modules to produce an |
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23 | * executable, regardless of the license terms of these independent |
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24 | * modules, and to copy and distribute the resulting executable under |
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25 | * terms of your choice, provided that you also meet, for each linked |
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26 | * independent module, the terms and conditions of the license of that |
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27 | * module. An independent module is a module which is not derived from |
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28 | * or based on this library. If you modify this library, you may extend |
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29 | * this exception to your version of the library, but you are not |
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30 | * obligated to do so. If you do not wish to do so, delete this |
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31 | * exception statement from your version. |
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32 | */ |
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33 | |
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34 | package org.armedbear.lisp; |
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35 | |
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36 | import static org.armedbear.lisp.Lisp.*; |
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37 | |
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38 | public final class SimpleArray_T extends AbstractArray |
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39 | { |
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40 | private final int[] dimv; |
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41 | private final LispObject elementType; |
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42 | private final int totalSize; |
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43 | final LispObject[] data; |
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44 | |
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45 | public SimpleArray_T(int[] dimv, LispObject elementType) |
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46 | { |
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47 | this.dimv = dimv; |
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48 | this.elementType = elementType; |
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49 | totalSize = computeTotalSize(dimv); |
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50 | data = new LispObject[totalSize]; |
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51 | for (int i = totalSize; i-- > 0;) |
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52 | data[i] = Fixnum.ZERO; |
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53 | } |
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54 | |
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55 | public SimpleArray_T(int[] dimv, |
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56 | LispObject elementType, |
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57 | LispObject initialContents) |
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58 | |
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59 | { |
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60 | this.dimv = dimv; |
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61 | this.elementType = elementType; |
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62 | final int rank = dimv.length; |
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63 | LispObject rest = initialContents; |
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64 | for (int i = 0; i < rank; i++) |
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65 | { |
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66 | dimv[i] = rest.length(); |
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67 | rest = rest.elt(0); |
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68 | } |
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69 | totalSize = computeTotalSize(dimv); |
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70 | data = new LispObject[totalSize]; |
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71 | setInitialContents(0, dimv, initialContents, 0); |
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72 | } |
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73 | |
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74 | public SimpleArray_T(int rank, LispObject initialContents) |
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75 | |
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76 | { |
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77 | if (rank < 2) |
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78 | Debug.assertTrue(false); |
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79 | dimv = new int[rank]; |
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80 | this.elementType = T; |
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81 | LispObject rest = initialContents; |
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82 | for (int i = 0; i < rank; i++) |
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83 | { |
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84 | dimv[i] = rest.length(); |
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85 | if (rest == NIL || rest.length() == 0) |
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86 | break; |
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87 | rest = rest.elt(0); |
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88 | } |
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89 | totalSize = computeTotalSize(dimv); |
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90 | data = new LispObject[totalSize]; |
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91 | setInitialContents(0, dimv, initialContents, 0); |
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92 | } |
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93 | |
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94 | public SimpleArray_T(final int[] dimv, final LispObject[] initialData, |
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95 | final LispObject elementType) { |
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96 | this.dimv = dimv; |
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97 | this.elementType = elementType; |
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98 | this.data = initialData; |
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99 | this.totalSize = computeTotalSize(dimv); |
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100 | } |
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101 | |
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102 | private int setInitialContents(int axis, int[] dims, LispObject contents, |
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103 | int index) |
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104 | |
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105 | { |
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106 | if (dims.length == 0) |
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107 | { |
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108 | try |
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109 | { |
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110 | data[index] = contents; |
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111 | } |
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112 | catch (ArrayIndexOutOfBoundsException e) |
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113 | { |
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114 | error(new LispError("Bad initial contents for array.")); |
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115 | return -1; |
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116 | } |
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117 | ++index; |
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118 | } |
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119 | else |
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120 | { |
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121 | int dim = dims[0]; |
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122 | if (dim != contents.length()) |
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123 | { |
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124 | error(new LispError("Bad initial contents for array.")); |
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125 | return -1; |
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126 | } |
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127 | int[] newDims = new int[dims.length-1]; |
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128 | for (int i = 1; i < dims.length; i++) |
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129 | newDims[i-1] = dims[i]; |
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130 | if (contents.listp()) |
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131 | { |
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132 | for (int i = contents.length();i-- > 0;) |
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133 | { |
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134 | LispObject content = contents.car(); |
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135 | index = |
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136 | setInitialContents(axis + 1, newDims, content, index); |
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137 | contents = contents.cdr(); |
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138 | } |
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139 | } |
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140 | else |
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141 | { |
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142 | AbstractVector v = checkVector(contents); |
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143 | final int length = v.length(); |
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144 | for (int i = 0; i < length; i++) |
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145 | { |
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146 | LispObject content = v.AREF(i); |
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147 | index = |
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148 | setInitialContents(axis + 1, newDims, content, index); |
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149 | } |
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150 | } |
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151 | } |
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152 | return index; |
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153 | } |
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154 | |
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155 | @Override |
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156 | public LispObject typeOf() |
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157 | { |
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158 | return list(Symbol.SIMPLE_ARRAY, elementType, getDimensions()); |
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159 | } |
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160 | |
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161 | @Override |
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162 | public LispObject classOf() |
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163 | { |
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164 | return BuiltInClass.SIMPLE_ARRAY; |
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165 | } |
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166 | |
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167 | @Override |
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168 | public LispObject typep(LispObject typeSpecifier) |
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169 | { |
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170 | if (typeSpecifier == Symbol.SIMPLE_ARRAY) |
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171 | return T; |
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172 | if (typeSpecifier == BuiltInClass.SIMPLE_ARRAY) |
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173 | return T; |
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174 | return super.typep(typeSpecifier); |
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175 | } |
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176 | |
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177 | @Override |
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178 | public int getRank() |
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179 | { |
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180 | return dimv.length; |
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181 | } |
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182 | |
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183 | @Override |
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184 | public LispObject getDimensions() |
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185 | { |
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186 | LispObject result = NIL; |
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187 | for (int i = dimv.length; i-- > 0;) |
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188 | result = new Cons(Fixnum.getInstance(dimv[i]), result); |
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189 | return result; |
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190 | } |
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191 | |
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192 | @Override |
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193 | public int getDimension(int n) |
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194 | { |
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195 | try |
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196 | { |
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197 | return dimv[n]; |
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198 | } |
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199 | catch (ArrayIndexOutOfBoundsException e) |
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200 | { |
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201 | error(new TypeError("Bad array dimension " + n + ".")); |
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202 | return -1; |
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203 | } |
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204 | } |
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205 | |
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206 | @Override |
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207 | public LispObject getElementType() |
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208 | { |
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209 | return elementType; |
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210 | } |
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211 | |
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212 | @Override |
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213 | public int getTotalSize() |
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214 | { |
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215 | return totalSize; |
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216 | } |
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217 | |
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218 | @Override |
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219 | public boolean isAdjustable() |
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220 | { |
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221 | return false; |
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222 | } |
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223 | |
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224 | @Override |
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225 | public LispObject AREF(int index) |
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226 | { |
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227 | try |
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228 | { |
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229 | return data[index]; |
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230 | } |
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231 | catch (ArrayIndexOutOfBoundsException e) |
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232 | { |
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233 | return error(new TypeError("Bad row major index " + index + ".")); |
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234 | } |
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235 | } |
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236 | |
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237 | @Override |
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238 | public void aset(int index, LispObject newValue) |
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239 | { |
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240 | try |
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241 | { |
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242 | data[index] = newValue; |
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243 | } |
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244 | catch (ArrayIndexOutOfBoundsException e) |
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245 | { |
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246 | error(new TypeError("Bad row major index " + index + ".")); |
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247 | } |
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248 | } |
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249 | |
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250 | @Override |
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251 | public int getRowMajorIndex(int[] subscripts) |
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252 | { |
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253 | final int rank = dimv.length; |
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254 | if (rank != subscripts.length) |
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255 | { |
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256 | StringBuilder sb = new StringBuilder("Wrong number of subscripts ("); |
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257 | sb.append(subscripts.length); |
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258 | sb.append(") for array of rank "); |
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259 | sb.append(rank); |
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260 | sb.append('.'); |
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261 | error(new ProgramError(sb.toString())); |
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262 | } |
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263 | int sum = 0; |
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264 | int size = 1; |
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265 | for (int i = rank; i-- > 0;) |
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266 | { |
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267 | final int dim = dimv[i]; |
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268 | final int lastSize = size; |
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269 | size *= dim; |
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270 | int n = subscripts[i]; |
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271 | if (n < 0 || n >= dim) |
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272 | { |
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273 | StringBuilder sb = new StringBuilder("Invalid index "); |
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274 | sb.append(n); |
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275 | sb.append(" for array "); |
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276 | sb.append(this); |
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277 | sb.append('.'); |
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278 | error(new ProgramError(sb.toString())); |
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279 | } |
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280 | sum += n * lastSize; |
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281 | } |
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282 | return sum; |
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283 | } |
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284 | |
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285 | @Override |
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286 | public LispObject get(int[] subscripts) |
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287 | { |
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288 | try |
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289 | { |
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290 | return data[getRowMajorIndex(subscripts)]; |
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291 | } |
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292 | catch (ArrayIndexOutOfBoundsException e) |
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293 | { |
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294 | return error(new TypeError("Bad row major index " + |
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295 | getRowMajorIndex(subscripts) + ".")); |
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296 | } |
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297 | } |
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298 | |
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299 | @Override |
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300 | public void set(int[] subscripts, LispObject newValue) |
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301 | |
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302 | { |
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303 | try |
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304 | { |
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305 | data[getRowMajorIndex(subscripts)] = newValue; |
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306 | } |
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307 | catch (ArrayIndexOutOfBoundsException e) |
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308 | { |
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309 | error(new TypeError("Bad row major index " + |
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310 | getRowMajorIndex(subscripts) + ".")); |
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311 | } |
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312 | } |
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313 | |
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314 | @Override |
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315 | public void fill(LispObject obj) |
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316 | { |
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317 | for (int i = totalSize; i-- > 0;) |
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318 | data[i] = obj; |
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319 | } |
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320 | |
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321 | @Override |
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322 | public String writeToString() |
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323 | { |
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324 | return writeToString(dimv); |
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325 | } |
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326 | |
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327 | @Override |
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328 | public AbstractArray adjustArray(int[] dimv, LispObject initialElement, |
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329 | LispObject initialContents) |
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330 | |
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331 | { |
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332 | if (initialContents != null) |
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333 | return new SimpleArray_T(dimv, elementType, initialContents); |
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334 | for (int i = 0; i < dimv.length; i++) |
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335 | { |
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336 | if (dimv[i] != this.dimv[i]) |
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337 | { |
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338 | SimpleArray_T newArray = new SimpleArray_T(dimv, elementType); |
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339 | if (initialElement != null) |
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340 | newArray.fill(initialElement); |
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341 | copyArray(this, newArray); |
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342 | return newArray; |
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343 | } |
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344 | } |
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345 | // New dimensions are identical to old dimensions, yet |
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346 | // we're not mutable, so, we need to return a new array |
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347 | return new SimpleArray_T(dimv, data.clone(), elementType); |
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348 | } |
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349 | |
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350 | // Copy a1 to a2 for index tuples that are valid for both arrays. |
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351 | static void copyArray(AbstractArray a1, AbstractArray a2) |
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352 | |
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353 | { |
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354 | Debug.assertTrue(a1.getRank() == a2.getRank()); |
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355 | int[] subscripts = new int[a1.getRank()]; |
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356 | int axis = 0; |
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357 | copySubArray(a1, a2, subscripts, axis); |
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358 | } |
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359 | |
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360 | private static void copySubArray(AbstractArray a1, AbstractArray a2, |
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361 | int[] subscripts, int axis) |
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362 | |
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363 | { |
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364 | if (axis < subscripts.length) |
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365 | { |
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366 | final int limit = |
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367 | Math.min(a1.getDimension(axis), a2.getDimension(axis)); |
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368 | for (int i = 0; i < limit; i++) |
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369 | { |
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370 | subscripts[axis] = i; |
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371 | copySubArray(a1, a2, subscripts, axis + 1); |
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372 | } |
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373 | } |
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374 | else |
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375 | { |
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376 | int i1 = a1.getRowMajorIndex(subscripts); |
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377 | int i2 = a2.getRowMajorIndex(subscripts); |
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378 | a2.aset(i2, a1.AREF(i1)); |
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379 | } |
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380 | } |
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381 | |
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382 | @Override |
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383 | public AbstractArray adjustArray(int[] dimv, AbstractArray displacedTo, |
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384 | int displacement) |
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385 | { |
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386 | return new ComplexArray(dimv, displacedTo, displacement); |
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387 | } |
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388 | } |
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