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annotate src/org/tmatesoft/hg/internal/RevlogDump.java @ 463:a0507a9f3da0 smartgit3

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Initial support for MqExtension
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 20 Jun 2012 21:16:21 +0200
parents 656a6c1346ff
children f52ca9530774
rev   line source
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1 /*
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2 * Copyright (c) 2010-2011 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.internal;
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18
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19 import java.io.BufferedInputStream;
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20 import java.io.ByteArrayInputStream;
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21 import java.io.DataInput;
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22 import java.io.DataInputStream;
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23 import java.io.File;
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24 import java.io.FileInputStream;
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25 import java.io.IOException;
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26 import java.io.UnsupportedEncodingException;
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27 import java.math.BigInteger;
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28 import java.nio.ByteBuffer;
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29 import java.nio.channels.FileChannel;
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30 import java.util.zip.Inflater;
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31
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32 /**
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33 * Utility to test/debug/troubleshoot
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34 *
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35 * @author Artem Tikhomirov
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36 * @author TMate Software Ltd.
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37 */
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38 public class RevlogDump {
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39
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40 /**
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41 * Takes 3 command line arguments -
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42 * repository path,
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43 * path to index file (i.e. store/data/hello.c.i) in the repository (relative)
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44 * and "dumpData" whether to print actual content or just revlog headers
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45 */
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46 public static void main(String[] args) throws Exception {
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47 String repo = "/temp/hg/hello/.hg/";
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48 String filename = "store/00changelog.i";
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49 // String filename = "store/data/hello.c.i";
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50 // String filename = "store/data/docs/readme.i";
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51 boolean dumpDataFull = true;
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52 boolean dumpDataStats = false;
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53 if (args.length > 1) {
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54 repo = args[0];
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55 filename = args[1];
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56 dumpDataFull = args.length > 2 ? "dumpData".equals(args[2]) : false;
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57 dumpDataStats = args.length > 2 ? "dumpDataStats".equals(args[2]) : false;
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58 }
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59 final boolean needRevData = dumpDataFull || dumpDataStats;
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60 //
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61 DataInputStream dis = new DataInputStream(new BufferedInputStream(new FileInputStream(new File(repo, filename))));
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62 DataInput di = dis;
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63 dis.mark(10);
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64 int versionField = di.readInt();
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65 dis.reset();
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66 final int INLINEDATA = 1 << 16;
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67
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68 final boolean inlineData = (versionField & INLINEDATA) != 0;
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69 System.out.printf("%#8x, inline: %b\n", versionField, inlineData);
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70 FileChannel dataStream = null;
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71 if (!inlineData && needRevData) {
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72 dataStream = new FileInputStream(new File(repo, filename.substring(0, filename.length()-2) + ".d")).getChannel();
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73 }
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74 System.out.println("Index Offset Flags Packed Actual Base Rev Link Rev Parent1 Parent2 nodeid");
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75 int entryIndex = 0;
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76 while (dis.available() > 0) {
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77 long l = di.readLong();
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78 long offset = entryIndex == 0 ? 0 : (l >>> 16);
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79 int flags = (int) (l & 0X0FFFF);
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80 int compressedLen = di.readInt();
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81 int actualLen = di.readInt();
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82 int baseRevision = di.readInt();
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83 int linkRevision = di.readInt();
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84 int parent1Revision = di.readInt();
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85 int parent2Revision = di.readInt();
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86 byte[] buf = new byte[32];
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87 di.readFully(buf, 12, 20);
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88 dis.skipBytes(12);
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89 // CAN'T USE skip() here without extra precautions. E.g. I ran into situation when
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90 // buffer was 8192 and BufferedInputStream was at position 8182 before attempt to skip(12).
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91 // BIS silently skips available bytes and leaves me two extra bytes that ruin the rest of the code.
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92 System.out.printf("%4d:%14d %6X %10d %10d %10d %10d %8d %8d %040x\n", entryIndex, offset, flags, compressedLen, actualLen, baseRevision, linkRevision, parent1Revision, parent2Revision, new BigInteger(buf));
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93 String resultString;
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94 byte[] data = new byte[compressedLen];
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95 if (inlineData) {
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96 di.readFully(data);
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97 } else if (needRevData) {
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98 dataStream.position(offset);
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99 dataStream.read(ByteBuffer.wrap(data));
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100 }
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101 if (needRevData) {
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102 if (compressedLen == 0) {
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103 resultString = "<NO DATA>";
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104 } else {
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105 if (data[0] == 0x78 /* 'x' */) {
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106 Inflater zlib = new Inflater();
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107 zlib.setInput(data, 0, compressedLen);
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108 byte[] result = new byte[actualLen*2];
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109 int resultLen = zlib.inflate(result);
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110 zlib.end();
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111 resultString = buildString(result, 0, resultLen, baseRevision != entryIndex, dumpDataFull);
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112 } else if (data[0] == 0x75 /* 'u' */) {
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113 resultString = buildString(data, 1, data.length - 1, baseRevision != entryIndex, dumpDataFull);
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114 } else {
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115 resultString = buildString(data, 0, data.length, baseRevision != entryIndex, dumpDataFull);
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116 }
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117 }
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118 System.out.println(resultString);
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119 }
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120 entryIndex++;
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121 }
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122 dis.close();
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123 if (dataStream != null) {
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124 dataStream.close();
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125 }
0
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126 //
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127 }
392
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128
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129 private static String buildString(byte[] data, int offset, int len, boolean isPatch, boolean completeDataDump) throws IOException, UnsupportedEncodingException {
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130 if (isPatch) {
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131 DataInputStream dis = new DataInputStream(new ByteArrayInputStream(data, offset, len));
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132 StringBuilder sb = new StringBuilder();
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133 sb.append("<PATCH>:\n");
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134 while (dis.available() > 0) {
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135 int s = dis.readInt();
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136 int e = dis.readInt();
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137 int l = dis.readInt();
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138 sb.append(String.format("%d..%d, %d", s, e, l));
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139 if (completeDataDump) {
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140 byte[] src = new byte[l];
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141 dis.read(src, 0, l);
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142 sb.append(":");
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143 sb.append(new String(src, 0, l, "UTF-8"));
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144 } else {
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145 dis.skipBytes(l);
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146 }
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147 sb.append('\n');
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148 }
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149 return sb.toString();
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150 } else {
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151 if (completeDataDump) {
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152 return new String(data, offset, len, "UTF-8");
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153 }
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154 return String.format("<DATA>:%d bytes", len-offset);
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155 }
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156 }
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157 }