Mercurial > hg4j

annotate cmdline/org/tmatesoft/hg/console/Incoming.java @ 183:9807bf8f3a9c

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Do not assume second parent can be set only when first one is set
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 13 Apr 2011 14:15:13 +0200
parents f26ffe04ced0
children ec1820f64d2b
rev   line source
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1 /*
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2 * Copyright (c) 2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.console;
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18
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19 import java.util.ArrayList;
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20 import java.util.Arrays;
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21 import java.util.Collections;
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22 import java.util.Comparator;
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23 import java.util.HashSet;
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24 import java.util.Iterator;
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25 import java.util.LinkedHashMap;
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26 import java.util.LinkedList;
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27 import java.util.List;
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28 import java.util.ListIterator;
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29 import java.util.Map.Entry;
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31 import org.tmatesoft.hg.core.HgException;
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32 import org.tmatesoft.hg.core.Nodeid;
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33 import org.tmatesoft.hg.internal.RepositoryComparator;
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34 import org.tmatesoft.hg.internal.RepositoryComparator.BranchChain;
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35 import org.tmatesoft.hg.repo.HgChangelog;
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36 import org.tmatesoft.hg.repo.HgLookup;
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37 import org.tmatesoft.hg.repo.HgRemoteRepository;
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38 import org.tmatesoft.hg.repo.HgRepository;
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39
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41 /**
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42 * WORK IN PROGRESS, DO NOT USE
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43 * hg incoming counterpart
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44 *
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45 * @author Artem Tikhomirov
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46 * @author TMate Software Ltd.
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47 */
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48 public class Incoming {
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49
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50 public static void main(String[] args) throws Exception {
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51 if (Boolean.FALSE.booleanValue()) {
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52 new SequenceConstructor().test();
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53 return;
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54 }
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55 Options cmdLineOpts = Options.parse(args);
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56 HgRepository hgRepo = cmdLineOpts.findRepository();
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57 if (hgRepo.isInvalid()) {
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58 System.err.printf("Can't find repository in: %s\n", hgRepo.getLocation());
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59 return;
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60 }
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61 HgRemoteRepository hgRemote = new HgLookup().detectRemote("svnkit", hgRepo);
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62 if (hgRemote.isInvalid()) {
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63 System.err.printf("Remote repository %s is not valid", hgRemote.getLocation());
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64 return;
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65 }
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66 //
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67 // in fact, all we need from changelog is set of all nodeids. However, since ParentWalker reuses same Nodeids, it's not too expensive
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68 // to reuse it here, XXX although later this may need to be refactored
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69 final HgChangelog.ParentWalker pw = hgRepo.getChangelog().new ParentWalker();
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70 pw.init();
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71 //
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72 RepositoryComparator repoCompare = new RepositoryComparator(pw, hgRemote);
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73 repoCompare.compare(null);
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74 List<BranchChain> missingBranches0 = repoCompare.calculateMissingBranches();
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75 for (BranchChain bc : missingBranches0) {
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76 bc.dump();
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78 List<Nodeid> missing = visitBranches(repoCompare, bc);
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79 // Collections.reverse(missing); // useful to test output, from newer to older
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80 for (Nodeid n : missing) {
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81 if (pw.knownNode(n)) {
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82 System.out.println("Erroneous to fetch:" + n);
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83 } else {
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84 System.out.println(n);
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85 }
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86 }
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87 System.out.println("Branch done");
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88 }
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90 }
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91
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93 private static List<Nodeid> visitBranches(RepositoryComparator repoCompare, BranchChain bc) throws HgException {
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94 if (bc == null) {
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95 return Collections.emptyList();
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96 }
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97 List<Nodeid> mine = repoCompare.completeBranch(bc.branchRoot, bc.branchHead);
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98 if (bc.isTerminal()) {
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99 return mine;
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100 }
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101 List<Nodeid> parentBranch1 = visitBranches(repoCompare, bc.p1);
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102 List<Nodeid> parentBranch2 = visitBranches(repoCompare, bc.p2);
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103 // merge
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104 LinkedList<Nodeid> merged = new LinkedList<Nodeid>();
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105 ListIterator<Nodeid> i1 = parentBranch1.listIterator(), i2 = parentBranch2.listIterator();
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106 while (i1.hasNext() && i2.hasNext()) {
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107 Nodeid n1 = i1.next();
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108 Nodeid n2 = i2.next();
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109 if (n1.equals(n2)) {
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110 merged.addLast(n1);
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111 } else {
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112 // first different => add both, and continue adding both tails sequentially
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113 merged.add(n2);
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114 merged.add(n1);
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115 break;
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116 }
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117 }
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118 // copy rest of second parent branch
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119 while (i2.hasNext()) {
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120 merged.add(i2.next());
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121 }
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122 // copy rest of first parent branch
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123 while (i1.hasNext()) {
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124 merged.add(i1.next());
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125 }
31
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126 //
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127 ArrayList<Nodeid> rv = new ArrayList<Nodeid>(mine.size() + merged.size());
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128 rv.addAll(merged);
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129 rv.addAll(mine);
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130 return rv;
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131 }
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132
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133
173
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134 private static class SequenceConstructor {
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135
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136 private int[] between(int root, int head) {
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137 if (head <= (root+1)) {
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138 return new int[0];
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139 }
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140 System.out.printf("[%d, %d]\t\t", root, head);
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141 int size = 1 + (int) Math.floor(Math.log(head-root - 1) / Math.log(2));
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142 int[] rv = new int[size];
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143 for (int v = 1, i = 0; i < rv.length; i++) {
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144 rv[i] = root + v;
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145 v = v << 1;
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146 }
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147 System.out.println(Arrays.toString(rv));
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148 return rv;
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149 }
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150
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151 public void test() {
176
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152 int root = 0, head = 126;
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153 int[] data = between(root, head); // max number of elements to recover is 2**data.length-1, when head is exactly
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154 // 2**data.length element of the branch.
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155 // In such case, total number of elements in the branch (including head and root, would be 2**data.length+1
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156 int[] finalSequence = new int[1 + (1 << data.length >>> 5)]; // div 32 - total bits to integers, +1 for possible modulus
173
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157 int exactNumberOfElements = -1; // exact number of meaningful bits in finalSequence
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158 LinkedHashMap<Integer, int[]> datas = new LinkedHashMap<Integer, int[]>();
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159 datas.put(root, data);
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160 int totalQueries = 1;
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161 HashSet<Integer> queried = new HashSet<Integer>();
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162 int[] checkSequence = null;
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163 while(!datas.isEmpty()) {
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164 LinkedList<int[]> toQuery = new LinkedList<int[]>();
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165 do {
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166 Iterator<Entry<Integer, int[]>> it = datas.entrySet().iterator();
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167 Entry<Integer, int[]> next = it.next();
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168 int r = next.getKey();
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169 data = next.getValue();
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170 it.remove();
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171 populate(r, head, data, finalSequence);
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172 if (checkSequence != null) {
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173 boolean match = true;
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174 // System.out.println("Try to match:");
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175 for (int i = 0; i < checkSequence.length; i++) {
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176 // System.out.println(i);
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177 // System.out.println("control:" + toBinaryString(checkSequence[i], ' '));
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178 // System.out.println("present:" + toBinaryString(finalSequence[i], ' '));
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179 if (checkSequence[i] != finalSequence[i]) {
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180 match = false;
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181 } else {
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182 match &= true;
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183 }
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184 }
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185 System.out.println(match ? "Match, on query:" + totalQueries : "Didn't match");
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186 }
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187 if (data.length > 1) {
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188 /*queries for elements next to head is senseless, hence data.length check above and head-x below*/
173
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189 for (int x : data) {
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190 if (!queried.contains(x) && head - x > 1) {
173
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191 toQuery.add(new int[] {x, head});
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192 }
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193 }
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194 }
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195 } while (!datas.isEmpty()) ;
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196 if (!toQuery.isEmpty()) {
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197 System.out.println();
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198 totalQueries++;
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199 }
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200 Collections.sort(toQuery, new Comparator<int[]>() {
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201
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202 public int compare(int[] o1, int[] o2) {
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203 return o1[0] < o2[0] ? -1 : (o1[0] == o2[0] ? 0 : 1);
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204 }
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205 });
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206 for (int[] x : toQuery) {
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207 if (!queried.contains(x[0])) {
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208 queried.add(x[0]);
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209 data = between(x[0], x[1]);
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210 if (exactNumberOfElements == -1 && data.length == 1) {
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211 exactNumberOfElements = x[0] + 1;
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212 System.out.printf("On query %d found out exact number of missing elements: %d\n", totalQueries, exactNumberOfElements);
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213 // get a bit sequence of exactNumberOfElements, 0111..110
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214 // to 'and' it with finalSequence later
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215 int totalInts = (exactNumberOfElements + 2 /*heading and tailing zero bits*/) >>> 5;
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216 int trailingBits = (exactNumberOfElements + 2) & 0x1f;
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217 if (trailingBits != 0) {
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218 totalInts++;
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219 }
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220 checkSequence = new int[totalInts];
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221 Arrays.fill(checkSequence, 0xffffffff);
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222 checkSequence[0] &= 0x7FFFFFFF;
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223 if (trailingBits == 0) {
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224 checkSequence[totalInts-1] &= 0xFFFFFFFE;
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225 } else if (trailingBits == 1) {
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226 checkSequence[totalInts-1] = 0;
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227 } else {
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228 // trailingBits include heading and trailing zero bits
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229 int mask = 0x80000000 >> trailingBits-2; // with sign!
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230 checkSequence[totalInts - 1] &= mask;
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231 }
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232 for (int e : checkSequence) {
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233 System.out.print(toBinaryString(e, ' '));
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234 }
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235 System.out.println();
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236 }
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237 datas.put(x[0], data);
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238 }
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239 }
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240 }
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241
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242 System.out.println("Total queries:" + totalQueries);
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243 for (int x : finalSequence) {
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244 System.out.print(toBinaryString(x, ' '));
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245 }
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246 }
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247
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248 private void populate(int root, int head, int[] data, int[] finalSequence) {
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249 for (int i = 1, x = 0; root+i < head; i = i << 1, x++) {
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250 int value = data[x];
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251 int value_check = root+i;
174
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252 if (value != value_check) {
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253 throw new IllegalStateException();
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254 }
173
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255 int wordIx = (root + i) >>> 5;
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256 int bitIx = (root + i) & 0x1f;
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257 finalSequence[wordIx] |= 1 << (31-bitIx);
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258 }
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259 }
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260
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261 private static String toBinaryString(int x, char byteSeparator) {
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262 StringBuilder sb = new StringBuilder(4*8+4);
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263 sb.append(toBinaryString((byte) (x >>> 24)));
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264 sb.append(byteSeparator);
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265 sb.append(toBinaryString((byte) ((x & 0x00ff0000) >>> 16)));
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266 sb.append(byteSeparator);
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267 sb.append(toBinaryString((byte) ((x & 0x00ff00) >>> 8)));
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268 sb.append(byteSeparator);
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269 sb.append(toBinaryString((byte) (x & 0x00ff)));
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270 sb.append(byteSeparator);
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271 return sb.toString();
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272 }
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273
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274 private static String toBinaryString(byte b) {
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275 final String nibbles = "0000000100100011010001010110011110001001101010111100110111101111";
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276 assert nibbles.length() == 16*4;
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277 int x1 = (b >>> 4) & 0x0f, x2 = b & 0x0f;
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278 x1 *= 4; x2 *= 4; // 4 characters per nibble
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279 return nibbles.substring(x1, x1+4).concat(nibbles.substring(x2, x2+4));
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280 }
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281 }
31
346b66add79d Basic lookup for incoming changes
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282 }