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annotate src/org/tmatesoft/hg/repo/RevlogStream.java @ 74:6f1b88693d48

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Complete refactoring to org.tmatesoft
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 24 Jan 2011 03:14:45 +0100
parents src/com/tmate/hgkit/ll/RevlogStream.java@30bd38978846
children
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@svnkit.com
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16 */
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17 package org.tmatesoft.hg.repo;
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19 import static org.tmatesoft.hg.repo.HgRepository.TIP;
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21 import java.io.File;
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22 import java.io.IOException;
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23 import java.util.ArrayList;
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24 import java.util.Collections;
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25 import java.util.LinkedList;
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26 import java.util.List;
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27 import java.util.zip.DataFormatException;
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28 import java.util.zip.Inflater;
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30 import org.tmatesoft.hg.core.Nodeid;
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31 import org.tmatesoft.hg.internal.DataAccess;
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32 import org.tmatesoft.hg.internal.DataAccessProvider;
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35 /**
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36 * XXX move to .internal?
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37 * ? Single RevlogStream per file per repository with accessor to record access session (e.g. with back/forward operations),
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38 * or numerous RevlogStream with separate representation of the underlaying data (cached, lazy ChunkStream)?
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39 *
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40 * @see http://mercurial.selenic.com/wiki/Revlog
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41 * @see http://mercurial.selenic.com/wiki/RevlogNG
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42 *
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43 * @author Artem Tikhomirov
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44 * @author TMate Software Ltd.
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45 */
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46 public class RevlogStream {
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47
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48 private List<IndexEntry> index; // indexed access highly needed
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49 private boolean inline = false;
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50 private final File indexFile;
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51 private final DataAccessProvider dataAccess;
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53 // if we need anything else from HgRepo, might replace DAP parameter with HgRepo and query it for DAP.
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54 RevlogStream(DataAccessProvider dap, File indexFile) {
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55 this.dataAccess = dap;
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56 this.indexFile = indexFile;
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57 }
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59 /*package*/ DataAccess getIndexStream() {
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60 return dataAccess.create(indexFile);
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61 }
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63 /*package*/ DataAccess getDataStream() {
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64 final String indexName = indexFile.getName();
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65 File dataFile = new File(indexFile.getParentFile(), indexName.substring(0, indexName.length() - 1) + "d");
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66 return dataAccess.create(dataFile);
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67 }
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68
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69 public int revisionCount() {
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70 initOutline();
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71 return index.size();
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72 }
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73
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74 public int dataLength(int revision) {
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75 // XXX in fact, use of iterate() instead of this implementation may be quite reasonable.
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76 //
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77 final int indexSize = revisionCount();
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78 DataAccess daIndex = getIndexStream(); // XXX may supply a hint that I'll need really few bytes of data (although at some offset)
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79 if (revision == TIP) {
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80 revision = indexSize - 1;
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81 }
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82 try {
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83 int recordOffset = inline ? (int) index.get(revision).offset : revision * REVLOGV1_RECORD_SIZE;
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84 daIndex.seek(recordOffset + 12); // 6+2+4
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85 int actualLen = daIndex.readInt();
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86 return actualLen;
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87 } catch (IOException ex) {
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88 ex.printStackTrace(); // log error. FIXME better handling
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89 throw new IllegalStateException(ex);
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90 } finally {
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91 daIndex.done();
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92 }
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93 }
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95 // Perhaps, RevlogStream should be limited to use of plain int revisions for access,
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96 // while Nodeids should be kept on the level up, in Revlog. Guess, Revlog better keep
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97 // map of nodeids, and once this comes true, we may get rid of this method.
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98 // Unlike its counterpart, Revlog#getLocalRevisionNumber, doesn't fail with exception if node not found,
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99 // returns a predefined constant instead
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100 /*package-local*/ int findLocalRevisionNumber(Nodeid nodeid) {
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101 // XXX this one may be implemented with iterate() once there's mechanism to stop iterations
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102 final int indexSize = revisionCount();
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103 DataAccess daIndex = getIndexStream();
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104 try {
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105 byte[] nodeidBuf = new byte[20];
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106 for (int i = 0; i < indexSize; i++) {
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107 daIndex.skip(8);
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108 int compressedLen = daIndex.readInt();
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109 daIndex.skip(20);
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110 daIndex.readBytes(nodeidBuf, 0, 20);
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111 if (nodeid.equalsTo(nodeidBuf)) {
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112 return i;
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113 }
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114 daIndex.skip(inline ? 12 + compressedLen : 12);
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115 }
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116 } catch (IOException ex) {
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117 ex.printStackTrace(); // log error. FIXME better handling
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118 throw new IllegalStateException(ex);
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119 } finally {
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120 daIndex.done();
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121 }
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122 return Integer.MIN_VALUE;
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123 }
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parents: 6
diff changeset
126 private final int REVLOGV1_RECORD_SIZE = 64;
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diff changeset
127
3
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parents: 2
diff changeset
128 // should be possible to use TIP, ALL, or -1, -2, -n notation of Hg
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diff changeset
129 // ? boolean needsNodeid
2
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parents: 0
diff changeset
130 public void iterate(int start, int end, boolean needData, Revlog.Inspector inspector) {
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parents: 0
diff changeset
131 initOutline();
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parents: 0
diff changeset
132 final int indexSize = index.size();
3
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diff changeset
133 if (indexSize == 0) {
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diff changeset
134 return;
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diff changeset
135 }
5
fc265ddeab26 File content and non-effective, although working, patch application
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
136 if (end == TIP) {
3
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diff changeset
137 end = indexSize - 1;
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diff changeset
138 }
5
fc265ddeab26 File content and non-effective, although working, patch application
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parents: 4
diff changeset
139 if (start == TIP) {
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parents: 4
diff changeset
140 start = indexSize - 1;
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parents: 4
diff changeset
141 }
2
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parents: 0
diff changeset
142 if (start < 0 || start >= indexSize) {
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parents: 0
diff changeset
143 throw new IllegalArgumentException("Bad left range boundary " + start);
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parents: 0
diff changeset
144 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
145 if (end < start || end >= indexSize) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
146 throw new IllegalArgumentException("Bad right range boundary " + end);
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parents: 0
diff changeset
147 }
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diff changeset
148 // XXX may cache [start .. end] from index with a single read (pre-read)
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parents: 0
diff changeset
149
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150 DataAccess daIndex = null, daData = null;
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diff changeset
151 daIndex = getIndexStream();
3
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diff changeset
152 if (needData && !inline) {
9
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153 daData = getDataStream();
2
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154 }
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155 try {
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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156 byte[] nodeidBuf = new byte[20];
3
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diff changeset
157 byte[] lastData = null;
5
fc265ddeab26 File content and non-effective, although working, patch application
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diff changeset
158 int i;
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diff changeset
159 boolean extraReadsToBaseRev = false;
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parents: 4
diff changeset
160 if (needData && index.get(start).baseRevision < start) {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
161 i = index.get(start).baseRevision;
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diff changeset
162 extraReadsToBaseRev = true;
fc265ddeab26 File content and non-effective, although working, patch application
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
163 } else {
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
164 i = start;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
165 }
9
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
166
22
603806cd2dc6 Status of local working dir against non-tip base revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 10
diff changeset
167 daIndex.seek(inline ? (int) index.get(i).offset : i * REVLOGV1_RECORD_SIZE);
5
fc265ddeab26 File content and non-effective, although working, patch application
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
168 for (; i <= end; i++ ) {
9
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parents: 6
diff changeset
169 long l = daIndex.readLong();
49
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 44
diff changeset
170 @SuppressWarnings("unused")
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
171 long offset = l >>> 16;
49
26e3eeaa3962 branch and user filtering for log operation
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 44
diff changeset
172 @SuppressWarnings("unused")
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
173 int flags = (int) (l & 0X0FFFF);
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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parents: 6
diff changeset
174 int compressedLen = daIndex.readInt();
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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parents: 6
diff changeset
175 int actualLen = daIndex.readInt();
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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parents: 6
diff changeset
176 int baseRevision = daIndex.readInt();
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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parents: 6
diff changeset
177 int linkRevision = daIndex.readInt();
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parents: 6
diff changeset
178 int parent1Revision = daIndex.readInt();
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parents: 6
diff changeset
179 int parent2Revision = daIndex.readInt();
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
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parents: 22
diff changeset
180 // Hg has 32 bytes here, uses 20 for nodeid, and keeps 12 last bytes empty
d4fdd1845b3f Nodeid with array of exactly 20 bytes
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diff changeset
181 daIndex.readBytes(nodeidBuf, 0, 20);
9
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diff changeset
182 daIndex.skip(12);
2
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diff changeset
183 byte[] data = null;
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diff changeset
184 if (needData) {
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parents: 0
diff changeset
185 byte[] dataBuf = new byte[compressedLen];
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parents: 0
diff changeset
186 if (inline) {
9
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diff changeset
187 daIndex.readBytes(dataBuf, 0, compressedLen);
2
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parents: 0
diff changeset
188 } else {
9
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diff changeset
189 daData.seek(index.get(i).offset);
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diff changeset
190 daData.readBytes(dataBuf, 0, compressedLen);
2
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diff changeset
191 }
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parents: 0
diff changeset
192 if (dataBuf[0] == 0x78 /* 'x' */) {
3
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diff changeset
193 try {
33
565ce0835674 TODO added, to try stream for unzip in revlog
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
194 Inflater zlib = new Inflater(); // XXX Consider reuse of Inflater, and/or stream alternative
3
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diff changeset
195 zlib.setInput(dataBuf, 0, compressedLen);
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diff changeset
196 byte[] result = new byte[actualLen*2]; // FIXME need to use zlib.finished() instead
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diff changeset
197 int resultLen = zlib.inflate(result);
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diff changeset
198 zlib.end();
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diff changeset
199 data = new byte[resultLen];
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diff changeset
200 System.arraycopy(result, 0, data, 0, resultLen);
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parents: 2
diff changeset
201 } catch (DataFormatException ex) {
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
202 ex.printStackTrace();
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diff changeset
203 data = new byte[0]; // FIXME need better failure strategy
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diff changeset
204 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
205 } else if (dataBuf[0] == 0x75 /* 'u' */) {
08db726a0fb7 Shaping out low-level Hg structures
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parents: 0
diff changeset
206 data = new byte[dataBuf.length - 1];
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parents: 0
diff changeset
207 System.arraycopy(dataBuf, 1, data, 0, data.length);
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parents: 0
diff changeset
208 } else {
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parents: 0
diff changeset
209 // XXX Python impl in fact throws exception when there's not 'x', 'u' or '0'
3
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diff changeset
210 // but I don't see reason not to return data as is
2
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parents: 0
diff changeset
211 data = dataBuf;
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diff changeset
212 }
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
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diff changeset
213 // XXX
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
214 if (baseRevision != i) { // XXX not sure if this is the right way to detect a patch
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
215 // this is a patch
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
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diff changeset
216 LinkedList<PatchRecord> patches = new LinkedList<PatchRecord>();
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
217 int patchElementIndex = 0;
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
218 do {
36
205f9b59b400 Strip parsing logic out from console frontend
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 35
diff changeset
219 PatchRecord pr = PatchRecord.read(data, patchElementIndex);
205f9b59b400 Strip parsing logic out from console frontend
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 35
diff changeset
220 patches.add(pr);
205f9b59b400 Strip parsing logic out from console frontend
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 35
diff changeset
221 patchElementIndex += 12 + pr.len;
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
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parents: 2
diff changeset
222 } while (patchElementIndex < data.length);
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parents: 2
diff changeset
223 //
5
fc265ddeab26 File content and non-effective, although working, patch application
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
224 byte[] baseRevContent = lastData;
6
5abe5af181bd Ant script to build commands and run sample
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 5
diff changeset
225 data = apply(baseRevContent, actualLen, patches);
3
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diff changeset
226 }
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
227 } else {
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
228 if (inline) {
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
229 daIndex.skip(compressedLen);
3
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diff changeset
230 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
231 }
5
fc265ddeab26 File content and non-effective, although working, patch application
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
232 if (!extraReadsToBaseRev || i >= start) {
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
233 inspector.next(i, actualLen, baseRevision, linkRevision, parent1Revision, parent2Revision, nodeidBuf, data);
5
fc265ddeab26 File content and non-effective, although working, patch application
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 4
diff changeset
234 }
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
235 lastData = data;
2
08db726a0fb7 Shaping out low-level Hg structures
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parents: 0
diff changeset
236 }
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
237 } catch (IOException ex) {
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
238 throw new IllegalStateException(ex); // FIXME need better handling
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
239 } finally {
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
240 daIndex.done();
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 6
diff changeset
241 if (daData != null) {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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parents: 6
diff changeset
242 daData.done();
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
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parents: 6
diff changeset
243 }
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
244 }
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
245 }
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
246
2
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
247 private void initOutline() {
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
248 if (index != null && !index.isEmpty()) {
08db726a0fb7 Shaping out low-level Hg structures
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 0
diff changeset
249 return;
08db726a0fb7 Shaping out low-level Hg structures
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250 }
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251 ArrayList<IndexEntry> res = new ArrayList<IndexEntry>();
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252 DataAccess da = getIndexStream();
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253 try {
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254 int versionField = da.readInt();
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255 da.readInt(); // just to skip next 2 bytes of offset + flags
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256 final int INLINEDATA = 1 << 16;
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257 inline = (versionField & INLINEDATA) != 0;
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258 long offset = 0; // first offset is always 0, thus Hg uses it for other purposes
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259 while(true) {
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260 int compressedLen = da.readInt();
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261 // 8+4 = 12 bytes total read here
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262 @SuppressWarnings("unused")
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263 int actualLen = da.readInt();
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264 int baseRevision = da.readInt();
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265 // 12 + 8 = 20 bytes read here
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266 // int linkRevision = di.readInt();
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267 // int parent1Revision = di.readInt();
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268 // int parent2Revision = di.readInt();
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269 // byte[] nodeid = new byte[32];
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270 if (inline) {
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271 res.add(new IndexEntry(offset + REVLOGV1_RECORD_SIZE * res.size(), baseRevision));
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272 da.skip(3*4 + 32 + compressedLen); // Check: 44 (skip) + 20 (read) = 64 (total RevlogNG record size)
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273 } else {
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274 res.add(new IndexEntry(offset, baseRevision));
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275 da.skip(3*4 + 32);
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276 }
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277 if (da.isEmpty()) {
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278 // fine, done then
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279 res.trimToSize();
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280 index = res;
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281 break;
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282 } else {
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283 // start reading next record
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284 long l = da.readLong();
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285 offset = l >>> 16;
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286 }
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287 }
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288 } catch (IOException ex) {
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289 ex.printStackTrace(); // log error
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290 // too bad, no outline then.
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291 index = Collections.emptyList();
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292 } finally {
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293 da.done();
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294 }
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295
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296 }
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297
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298
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299 // perhaps, package-local or protected, if anyone else from low-level needs them
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300 // XXX think over if we should keep offset in case of separate data file - we read the field anyway. Perhaps, distinct entry classes for Inline and non-inline indexes?
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301 private static class IndexEntry {
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302 public final long offset; // for separate .i and .d - copy of index record entry, for inline index - actual offset of the record in the .i file (record entry + revision * record size))
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303 //public final int length; // data past fixed record (need to decide whether including header size or not), and whether length is of compressed data or not
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304 public final int baseRevision;
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305
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306 public IndexEntry(long o, int baseRev) {
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307 offset = o;
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308 baseRevision = baseRev;
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309 }
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310 }
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311
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312 // mpatch.c : apply()
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313 // FIXME need to implement patch merge (fold, combine, gather and discard from aforementioned mpatch.[c|py]), also see Revlog and Mercurial PDF
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314 /*package-local for HgBundle; until moved to better place*/static byte[] apply(byte[] baseRevisionContent, int outcomeLen, List<PatchRecord> patch) {
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315 int last = 0, destIndex = 0;
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316 if (outcomeLen == -1) {
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317 outcomeLen = baseRevisionContent.length;
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318 for (PatchRecord pr : patch) {
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319 outcomeLen += pr.start - last + pr.len;
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320 last = pr.end;
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321 }
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322 outcomeLen -= last;
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323 last = 0;
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324 }
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325 byte[] rv = new byte[outcomeLen];
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326 for (PatchRecord pr : patch) {
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327 System.arraycopy(baseRevisionContent, last, rv, destIndex, pr.start-last);
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328 destIndex += pr.start - last;
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329 System.arraycopy(pr.data, 0, rv, destIndex, pr.data.length);
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330 destIndex += pr.data.length;
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331 last = pr.end;
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332 }
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333 System.arraycopy(baseRevisionContent, last, rv, destIndex, baseRevisionContent.length - last);
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334 return rv;
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335 }
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336
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337 // @see http://mercurial.selenic.com/wiki/BundleFormat, in Changelog group description
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338 /*package-local*/ static class PatchRecord { // copy of struct frag from mpatch.c
52
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339 /*
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340 Given there are pr1 and pr2:
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341 pr1.start to pr1.end will be replaced with pr's data (of pr1.len)
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342 pr1.end to pr2.start gets copied from base
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343 */
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344 int start, end, len;
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345 byte[] data;
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346
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347 // TODO consider PatchRecord that only records data position (absolute in data source), and acquires data as needed
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348 private PatchRecord(int p1, int p2, int length, byte[] src) {
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349 start = p1;
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350 end = p2;
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351 len = length;
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352 data = src;
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353 }
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354
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355 /*package-local*/ static PatchRecord read(byte[] data, int offset) {
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356 final int x = offset; // shorthand
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357 int p1 = ((data[x] & 0xFF)<< 24) | ((data[x+1] & 0xFF) << 16) | ((data[x+2] & 0xFF) << 8) | (data[x+3] & 0xFF);
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358 int p2 = ((data[x+4] & 0xFF) << 24) | ((data[x+5] & 0xFF) << 16) | ((data[x+6] & 0xFF) << 8) | (data[x+7] & 0xFF);
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359 int len = ((data[x+8] & 0xFF) << 24) | ((data[x+9] & 0xFF) << 16) | ((data[x+10] & 0xFF) << 8) | (data[x+11] & 0xFF);
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360 byte[] dataCopy = new byte[len];
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361 System.arraycopy(data, x+12, dataCopy, 0, len);
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362 return new PatchRecord(p1, p2, len, dataCopy);
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363 }
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364
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365 /*package-local*/ static PatchRecord read(DataAccess da) throws IOException {
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366 int p1 = da.readInt();
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367 int p2 = da.readInt();
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368 int len = da.readInt();
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369 byte[] src = new byte[len];
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370 da.readBytes(src, 0, len);
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Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 35
diff changeset
371 return new PatchRecord(p1, p2, len, src);
205f9b59b400 Strip parsing logic out from console frontend
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 35
diff changeset
372 }
205f9b59b400 Strip parsing logic out from console frontend
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 35
diff changeset
373
205f9b59b400 Strip parsing logic out from console frontend
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 35
diff changeset
374
3
24bb4f365164 Rudimentary log functionality with basic infrastructure is in place
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 2
diff changeset
375 }
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
376 }