1 | /* |
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2 | * BasicVector_IntBuffer.java |
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3 | * |
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4 | * Copyright (C) 2020 @easye |
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5 | * |
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6 | * This program is free software; you can redistribute it and/or |
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7 | * modify it under the terms of the GNU General Public License |
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8 | * as published by the Free Software Foundation; either version 2 |
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9 | * of the License, or (at your option) any later version. |
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10 | * |
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11 | * This program is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | * GNU General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU General Public License |
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17 | * along with this program; if not, write to the Free Software |
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18 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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19 | * |
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20 | * As a special exception, the copyright holders of this library give you |
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21 | * permission to link this library with independent modules to produce an |
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22 | * executable, regardless of the license terms of these independent |
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23 | * modules, and to copy and distribute the resulting executable under |
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24 | * terms of your choice, provided that you also meet, for each linked |
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25 | * independent module, the terms and conditions of the license of that |
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26 | * module. An independent module is a module which is not derived from |
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27 | * or based on this library. If you modify this library, you may extend |
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28 | * this exception to your version of the library, but you are not |
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29 | * obligated to do so. If you do not wish to do so, delete this |
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30 | * exception statement from your version. |
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31 | */ |
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32 | |
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33 | package org.armedbear.lisp; |
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34 | |
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35 | import static org.armedbear.lisp.Lisp.*; |
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36 | |
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37 | import java.nio.IntBuffer; |
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38 | import java.nio.ByteBuffer; |
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39 | |
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40 | // A basic vector is a specialized vector that is not displaced to another |
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41 | // array, has no fill pointer, and is not expressly adjustable. |
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42 | public final class BasicVector_IntBuffer |
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43 | extends AbstractVector |
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44 | { |
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45 | private int capacity; |
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46 | private IntBuffer elements; |
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47 | private boolean directAllocation; |
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48 | |
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49 | public BasicVector_IntBuffer(int capacity) { |
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50 | this(capacity, false); |
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51 | } |
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52 | |
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53 | public BasicVector_IntBuffer(int capacity, boolean directAllocation) { |
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54 | this.directAllocation = directAllocation; |
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55 | if (directAllocation) { |
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56 | ByteBuffer b = ByteBuffer.allocateDirect(capacity * 4); |
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57 | elements = b.asIntBuffer(); |
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58 | } else { |
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59 | elements = IntBuffer.allocate(capacity); |
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60 | } |
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61 | this.capacity = capacity; |
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62 | } |
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63 | |
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64 | public BasicVector_IntBuffer(LispObject[] array, boolean directAllocation) { |
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65 | capacity = array.length; |
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66 | this.directAllocation = directAllocation; |
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67 | if (directAllocation) { |
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68 | ByteBuffer b = ByteBuffer.allocateDirect(capacity * 4); |
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69 | elements = b.asIntBuffer(); |
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70 | } else { |
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71 | elements = IntBuffer.allocate(capacity); |
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72 | } |
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73 | for (int i = array.length; i-- > 0;) { |
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74 | // FIXME: if LispObeject is a number that can't fit into an int |
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75 | elements.put(i, (int)(array[i].longValue() & 0xffffffffL)); |
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76 | } |
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77 | } |
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78 | |
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79 | public BasicVector_IntBuffer(ByteBuffer buffer, boolean directAllocation) { |
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80 | this.directAllocation = directAllocation; |
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81 | elements = buffer.asIntBuffer(); |
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82 | capacity = ((java.nio.Buffer)buffer).limit() / 4; |
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83 | } |
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84 | |
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85 | public BasicVector_IntBuffer(IntBuffer buffer) { |
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86 | this(buffer, false); |
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87 | } |
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88 | |
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89 | public BasicVector_IntBuffer(IntBuffer buffer, boolean directAllocation) { |
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90 | this.directAllocation = directAllocation; |
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91 | elements = buffer; |
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92 | capacity = ((java.nio.Buffer)buffer).limit(); |
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93 | } |
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94 | |
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95 | @Override |
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96 | public LispObject typeOf() { |
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97 | return list(Symbol.SIMPLE_ARRAY, UNSIGNED_BYTE_32, |
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98 | new Cons(Fixnum.getInstance(capacity))); |
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99 | } |
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100 | |
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101 | @Override |
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102 | public LispObject classOf() { |
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103 | return BuiltInClass.VECTOR; |
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104 | } |
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105 | |
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106 | @Override |
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107 | public LispObject typep(LispObject type) { |
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108 | if (type == Symbol.SIMPLE_ARRAY) |
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109 | return T; |
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110 | if (type == BuiltInClass.SIMPLE_ARRAY) |
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111 | return T; |
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112 | return super.typep(type); |
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113 | } |
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114 | |
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115 | @Override |
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116 | public LispObject getElementType() { |
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117 | return UNSIGNED_BYTE_32; |
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118 | } |
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119 | |
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120 | @Override |
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121 | public boolean isSimpleVector() { |
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122 | return false; |
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123 | } |
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124 | |
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125 | @Override |
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126 | public boolean hasFillPointer() { |
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127 | return false; |
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128 | } |
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129 | |
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130 | @Override |
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131 | public boolean isAdjustable() { |
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132 | return false; |
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133 | } |
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134 | |
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135 | @Override |
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136 | public int capacity() { |
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137 | return capacity; |
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138 | } |
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139 | |
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140 | @Override |
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141 | public int length() { |
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142 | return capacity; |
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143 | } |
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144 | |
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145 | @Override |
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146 | public LispObject elt(int index) { |
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147 | try { |
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148 | return number(((long)elements.get(index)) & 0xffffffffL); |
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149 | } catch (IndexOutOfBoundsException e) { |
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150 | badIndex(index, capacity); |
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151 | return NIL; // Not reached. |
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152 | } |
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153 | } |
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154 | |
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155 | @Override |
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156 | public int aref(int index) { |
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157 | try { |
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158 | // FIXME: this shouldn't be used? |
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159 | return number(((long)elements.get(index)) & 0xffffffffL).intValue(); |
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160 | } catch (IndexOutOfBoundsException e) { |
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161 | badIndex(index, ((java.nio.Buffer)elements).limit()); |
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162 | return -1; // Not reached. |
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163 | } |
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164 | } |
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165 | |
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166 | @Override |
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167 | public long aref_long(int index) { |
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168 | try { |
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169 | return ((long)elements.get(index)) & 0xffffffffL; |
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170 | } catch (IndexOutOfBoundsException e) { |
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171 | badIndex(index, ((java.nio.Buffer)elements).limit()); |
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172 | return -1; // Not reached. |
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173 | } |
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174 | } |
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175 | |
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176 | @Override |
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177 | public LispObject AREF(int index) { |
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178 | try { |
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179 | return number(((long)elements.get(index)) & 0xffffffffL); |
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180 | } catch (IndexOutOfBoundsException e) { |
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181 | badIndex(index, ((java.nio.Buffer)elements).limit()); |
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182 | return NIL; // Not reached. |
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183 | } |
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184 | } |
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185 | |
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186 | @Override |
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187 | public void aset(int index, LispObject newValue) { |
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188 | try { |
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189 | if (newValue.isLessThan(Fixnum.ZERO) || newValue.isGreaterThan(UNSIGNED_BYTE_32_MAX_VALUE)) { |
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190 | type_error(newValue, UNSIGNED_BYTE_32); |
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191 | } |
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192 | elements.put(index, (int)(newValue.longValue() & 0xffffffffL)); |
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193 | } catch (IndexOutOfBoundsException e) { |
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194 | badIndex(index, capacity); |
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195 | } |
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196 | } |
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197 | |
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198 | @Override |
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199 | public LispObject subseq(int start, int end) { |
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200 | BasicVector_IntBuffer v = new BasicVector_IntBuffer(end - start); |
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201 | int i = start, j = 0; |
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202 | try { |
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203 | while (i < end) { |
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204 | v.elements.put(j++, elements.get(i++)); |
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205 | } |
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206 | return v; |
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207 | } catch (IndexOutOfBoundsException e) { |
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208 | // FIXME |
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209 | return error(new TypeError("Array index out of bounds: " + i + ".")); |
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210 | } |
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211 | } |
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212 | |
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213 | @Override |
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214 | public void fill(LispObject obj) { |
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215 | if (!(obj instanceof LispInteger)) { |
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216 | type_error(obj, Symbol.INTEGER); |
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217 | // Not reached. |
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218 | return; |
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219 | } |
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220 | if (obj.isLessThan(Fixnum.ZERO) || obj.isGreaterThan(UNSIGNED_BYTE_32_MAX_VALUE)) { |
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221 | type_error(obj, UNSIGNED_BYTE_32); |
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222 | } |
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223 | for (int i = capacity; i-- > 0;) { |
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224 | elements.put(i, (int)(obj.longValue() & 0xffffffffL)); |
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225 | } |
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226 | } |
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227 | |
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228 | @Override |
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229 | public void shrink(int n) { |
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230 | if (n < length()) { |
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231 | // One cannot shrink the underlying ByteBuffer physically, and |
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232 | // the elements field may refer to malloc()d memory that we |
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233 | // shouldn't touch, so use the java.nio.Buffer limit pointer. |
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234 | // Not totally sure that this strategy will work out⊠|
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235 | ((java.nio.Buffer)elements).limit(n); |
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236 | capacity = n; |
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237 | return; |
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238 | } |
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239 | if (n == capacity) { |
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240 | return; |
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241 | } |
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242 | error(new LispError()); |
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243 | } |
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244 | |
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245 | @Override |
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246 | public LispObject reverse() { |
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247 | BasicVector_IntBuffer result = new BasicVector_IntBuffer(capacity); |
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248 | int i, j; |
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249 | for (i = 0, j = capacity - 1; i < capacity; i++, j--) { |
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250 | result.elements.put(i, elements.get(j)); |
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251 | } |
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252 | return result; |
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253 | } |
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254 | |
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255 | @Override |
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256 | public LispObject nreverse() { |
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257 | int i = 0; |
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258 | int j = capacity - 1; |
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259 | while (i < j) { |
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260 | int temp = elements.get(i); |
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261 | elements.put(i, elements.get(j)); |
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262 | elements.put(j, temp); |
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263 | ++i; |
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264 | --j; |
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265 | } |
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266 | return this; |
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267 | } |
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268 | |
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269 | @Override |
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270 | public AbstractVector adjustArray(int newCapacity, |
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271 | LispObject initialElement, |
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272 | LispObject initialContents) { |
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273 | if (initialContents != null) { |
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274 | LispObject[] newElements = new LispObject[newCapacity]; |
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275 | if (initialContents.listp()) { |
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276 | LispObject list = initialContents; |
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277 | for (int i = 0; i < newCapacity; i++) { |
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278 | newElements[i] = list.car(); |
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279 | list = list.cdr(); |
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280 | } |
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281 | } else if (initialContents.vectorp()) { |
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282 | for (int i = 0; i < newCapacity; i++) { |
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283 | newElements[i] = initialContents.elt(i); |
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284 | } |
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285 | } else { |
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286 | type_error(initialContents, Symbol.SEQUENCE); |
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287 | } |
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288 | return new BasicVector_IntBuffer(newElements, directAllocation); |
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289 | } |
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290 | if (capacity != newCapacity) { |
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291 | LispObject[] newElements = new LispObject[newCapacity]; |
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292 | System.arraycopy(elements.array(), 0, newElements, 0, |
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293 | Math.min(capacity, newCapacity)); |
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294 | if (initialElement != null) { |
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295 | for (int i = capacity; i < newCapacity; i++) { |
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296 | newElements[i] = initialElement; |
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297 | } |
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298 | } |
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299 | return new BasicVector_IntBuffer(newElements, directAllocation); |
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300 | } |
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301 | // No change. |
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302 | return this; |
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303 | } |
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304 | |
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305 | @Override |
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306 | public AbstractVector adjustArray(int newCapacity, |
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307 | AbstractArray displacedTo, |
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308 | int displacement) { |
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309 | return new ComplexVector(newCapacity, displacedTo, displacement); |
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310 | } |
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311 | |
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312 | @Override |
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313 | public AbstractVector replace(AbstractVector source, |
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314 | int targetStart, int targetEnd, |
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315 | int sourceStart, int sourceEnd) |
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316 | { |
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317 | if (source instanceof BasicVector_IntBuffer) { |
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318 | IntBuffer view = ((BasicVector_IntBuffer)source).elements.asReadOnlyBuffer(); |
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319 | view.position(sourceStart); |
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320 | view.limit(sourceEnd); |
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321 | elements.position(targetStart); |
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322 | elements.put(view); |
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323 | elements.position(0); |
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324 | return this; |
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325 | } else { |
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326 | return super.replace(source, targetStart, targetEnd, sourceStart, sourceEnd); |
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327 | } |
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328 | } |
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329 | } |
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