Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/vm/NamedFields.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18
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19 package gov.nasa.jpf.vm;
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20
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21 import gov.nasa.jpf.util.HashData;
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22 import gov.nasa.jpf.util.IntVector;
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23
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24 /**
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25 * value container for non-array classes
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26 */
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27 public class NamedFields extends Fields {
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28
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29 /** this is where we store the instance data. Since field types are
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30 * heterogenous, we have to map everything into int
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31 */
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32 protected int[] values;
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33
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34 public NamedFields (int dataSize) {
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35 values = new int[dataSize];
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36 }
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37
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38 @Override
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39 public int[] asFieldSlots() {
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40 return values;
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41 }
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42
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43 /**
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44 * give an approximation of the heap size in bytes - we assume fields are word
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45 * aligned, hence the number of values*4 should be good. Note that this is
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46 * overridden by ArrayFields (arrays would be packed)
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47 */
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48 @Override
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49 public int getHeapSize () {
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50 return values.length*4;
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51 }
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52
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53 // our low level getters and setters
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54 @Override
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55 public int getIntValue (int index) {
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56 return values[index];
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57 }
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58
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59 public boolean isEqual(Fields o, int off, int len, int otherOff) {
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60 if (o instanceof NamedFields) {
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61 NamedFields other = (NamedFields) o;
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62 int iEnd = off + len;
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63 int jEnd = otherOff + len;
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64 int[] v = other.values;
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65
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66 if ((iEnd > values.length) || (jEnd > v.length)) {
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67 return false;
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68 }
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69
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70 for (int i = off, j = otherOff; i < iEnd; i++, j++) {
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71 if (values[i] != v[j]) {
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72 return false;
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73 }
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74 }
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75
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76 return true;
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77 } else {
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78 return false;
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79 }
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80 }
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81
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82 // same as above, just here to make intentions clear
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83 @Override
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84 public int getReferenceValue (int index) {
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85 return values[index];
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86 }
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87
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88 @Override
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89 public long getLongValue (int index) {
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90 return Types.intsToLong(values[index + 1], values[index]);
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91 }
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92
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93 @Override
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94 public boolean getBooleanValue (int index) {
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95 return Types.intToBoolean(values[index]);
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96 }
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97
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98 @Override
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99 public byte getByteValue (int index) {
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100 return (byte) values[index];
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101 }
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102
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103 @Override
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104 public char getCharValue (int index) {
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105 return (char) values[index];
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106 }
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107
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108 @Override
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109 public short getShortValue (int index) {
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110 return (short) values[index];
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111 }
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112
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113 // <2do> get rid of it!! this is only for internal use, to increase efficiency
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114 public int[] getValues() {
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115 return values;
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116 }
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117
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118 //--- the field modifier methods (both instance and static)
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119
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120 @Override
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121 public void setReferenceValue (int index, int newValue) {
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122 values[index] = newValue;
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123 }
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124
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125 @Override
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126 public void setBooleanValue (int index, boolean newValue) {
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127 values[index] = newValue ? 1 : 0;
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128 }
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129
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130 @Override
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131 public void setByteValue (int index, byte newValue) {
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132 values[index] = newValue;
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133 }
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134
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135 @Override
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136 public void setCharValue (int index, char newValue) {
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137 values[index] = newValue;
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138 }
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139
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140 @Override
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141 public void setShortValue (int index, short newValue) {
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142 values[index] = newValue;
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143 }
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144
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145 @Override
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146 public void setFloatValue (int index, float newValue) {
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147 values[index] = Types.floatToInt(newValue);
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148 }
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149
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150 @Override
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151 public void setIntValue (int index, int newValue) {
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152 values[index] = newValue;
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153 }
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154
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155 @Override
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156 public void setLongValue (int index, long newValue) {
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157 values[index++] = Types.hiLong(newValue);
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158 values[index] = Types.loLong(newValue);
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159 }
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160
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161 @Override
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162 public void setDoubleValue (int index, double newValue) {
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163 values[index++] = Types.hiDouble(newValue);
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164 values[index] = Types.loDouble(newValue);
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165 }
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166
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167
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168 @Override
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169 public float getFloatValue (int index) {
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170 return Types.intToFloat(values[index]);
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171 }
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172
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173 @Override
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174 public double getDoubleValue (int index) {
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175 return Types.intsToDouble( values[index+1], values[index]);
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176 }
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177
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178 /**
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179 * Creates a clone.
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180 */
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181 @Override
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182 public NamedFields clone () {
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183 NamedFields f = (NamedFields) cloneFields();
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184 f.values = values.clone();
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185 return f;
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186 }
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187
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188 /**
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189 * Checks for equality.
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190 */
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191 @Override
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192 public boolean equals (Object o) {
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193 if (o instanceof NamedFields) {
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194 NamedFields other = (NamedFields) o;
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195
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196 //--- check values
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197 int[] v1 = values;
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198 int[] v2 = other.values;
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199 int l = v1.length;
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200 if (l != v2.length) {
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201 return false;
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202 }
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203 for (int i = 0; i < l; i++) {
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204 if (v1[i] != v2[i]) {
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205 return false;
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206 }
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207 }
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208
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209 return super.compareAttrs(other);
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210
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211 } else {
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212 return false;
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213 }
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214 }
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215
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216 // serialization interface
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217 @Override
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218 public void appendTo(IntVector v) {
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219 v.append(values);
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220 }
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221
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222
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223 /**
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224 * Adds some data to the computation of an hashcode.
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225 */
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226 @Override
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227 public void hash (HashData hd) {
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228 int[] v = values;
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229 for (int i=0, l=v.length; i < l; i++) {
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230 hd.add(v[i]);
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231 }
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232 }
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233
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234 /**
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
235 * Size of the fields.
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236 */
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237 public int size () {
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238 return values.length;
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239 }
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diff changeset
240
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parents:
diff changeset
241 @Override
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parents:
diff changeset
242 public String toString () {
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diff changeset
243 StringBuilder sb = new StringBuilder("NamedFields[");
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diff changeset
244
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245 sb.append("values=");
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diff changeset
246 sb.append('[');
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diff changeset
247
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diff changeset
248 for (int i = 0; i < values.length; i++) {
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parents:
diff changeset
249 if (i != 0) {
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diff changeset
250 sb.append(',');
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parents:
diff changeset
251 }
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diff changeset
252
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diff changeset
253 sb.append(values[i]);
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parents:
diff changeset
254 }
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parents:
diff changeset
255
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parents:
diff changeset
256 sb.append(']');
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diff changeset
257 sb.append(',');
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diff changeset
258
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diff changeset
259 sb.append(']');
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diff changeset
260
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parents:
diff changeset
261 return sb.toString();
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parents:
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262 }
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parents:
diff changeset
263
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
264 // <2do> replace with copyTo() !!
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parents:
diff changeset
265 public int[] getRawValues() {
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parents:
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266 return values;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
267 }
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parents:
diff changeset
268
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diff changeset
269 public void copyFrom(Fields other) {
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parents:
diff changeset
270 System.arraycopy(((NamedFields)other).values, 0, this.values, 0, values.length);
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parents:
diff changeset
271 super.copyAttrs(other);
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parents:
diff changeset
272 }
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parents:
diff changeset
273
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diff changeset
274 }