Mercurial > jhg

annotate src/org/tmatesoft/hg/core/Nodeid.java @ 90:a95c700408a9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Correctly report copy/rename events for rev..working copy case
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 26 Jan 2011 06:31:40 +0100
parents c25c5c348d1b
children a3a2e5deb320
rev   line source
20
11cfabe692b3 Status operation for two repository revisions (no local dir involved)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 13
diff changeset
1 /*
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
2 * Copyright (c) 2010-2011 TMate Software Ltd
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
3 *
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
4 * This program is free software; you can redistribute it and/or modify
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
5 * it under the terms of the GNU General Public License as published by
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
6 * the Free Software Foundation; version 2 of the License.
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
7 *
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
8 * This program is distributed in the hope that it will be useful,
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
11 * GNU General Public License for more details.
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
12 *
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
13 * For information on how to redistribute this software under
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
14 * the terms of a license other than GNU General Public License
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
15 * contact TMate Software at support@svnkit.com
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
17 package org.tmatesoft.hg.core;
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
19 import static org.tmatesoft.hg.internal.DigestHelper.toHexString;
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
20
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
21 import java.util.Arrays;
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
22
20
11cfabe692b3 Status operation for two repository revisions (no local dir involved)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 13
diff changeset
23
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
24
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25 /**
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
26 * A 20-bytes (40 characters) long hash value to identify a revision.
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
27 * @see http://mercurial.selenic.com/wiki/Nodeid
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
28 *
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
29 * @author Artem Tikhomirov
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
30 * @author TMate Software Ltd.
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 *
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
32 */
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
33 public final class Nodeid {
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
35 /**
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
36 * <b>nullid</b>, empty root revision.
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
37 */
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
38 public static final Nodeid NULL = new Nodeid(new byte[20], false);
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
39
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
40 private final byte[] binaryData;
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
41
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
42 /**
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
43 * @param binaryRepresentation - array of exactly 20 bytes
28
b2251b7a9823 Explicit cons arg for clone is more error-prone
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
44 * @param shallClone - true if array is subject to future modification and shall be copied, not referenced
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
45 */
28
b2251b7a9823 Explicit cons arg for clone is more error-prone
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
46 public Nodeid(byte[] binaryRepresentation, boolean shallClone) {
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
47 // 5 int fields => 32 bytes
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
48 // byte[20] => 48 bytes
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
49 if (binaryRepresentation == null || binaryRepresentation.length != 20) {
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
50 throw new IllegalArgumentException();
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
51 }
28
b2251b7a9823 Explicit cons arg for clone is more error-prone
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
52 this.binaryData = shallClone ? binaryRepresentation.clone() : binaryRepresentation;
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
53 }
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
54
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
55 @Override
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
56 public int hashCode() {
46
4022c34a4804 Better hashCode impl
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
57 // digest (part thereof) seems to be nice candidate for the hashCode
4022c34a4804 Better hashCode impl
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
58 byte[] b = binaryData;
4022c34a4804 Better hashCode impl
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
59 return b[0] << 24 | (b[1] & 0xFF) << 16 | (b[2] & 0xFF) << 8 | (b[3] & 0xFF);
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
60 }
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
61
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
62 @Override
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
63 public boolean equals(Object o) {
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
64 if (o instanceof Nodeid) {
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
65 return Arrays.equals(this.binaryData, ((Nodeid) o).binaryData);
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
66 }
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
67 return false;
22
603806cd2dc6 Status of local working dir against non-tip base revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
68 }
603806cd2dc6 Status of local working dir against non-tip base revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
69
603806cd2dc6 Status of local working dir against non-tip base revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
70 public boolean equalsTo(byte[] buf) {
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
71 return Arrays.equals(this.binaryData, buf);
22
603806cd2dc6 Status of local working dir against non-tip base revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
72 }
603806cd2dc6 Status of local working dir against non-tip base revision
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 20
diff changeset
73
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
74 @Override
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
75 public String toString() {
34
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
76 // XXX may want to output just single 0 for the NULL id?
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
77 return toHexString(binaryData, 0, binaryData.length);
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
78 }
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
79
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
80 public String shortNotation() {
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
81 return toHexString(binaryData, 0, 6);
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
82 }
34
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
83
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
84 public boolean isNull() {
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
85 if (this == NULL) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
86 return true;
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
87 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
88 for (int i = 0; i < 20; i++) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
89 if (this.binaryData[i] != 0) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
90 return false;
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
91 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
92 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
93 return true;
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
94 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
95
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
96 // copy
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 46
diff changeset
97 public byte[] toByteArray() {
41
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 34
diff changeset
98 return binaryData.clone();
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 34
diff changeset
99 }
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 34
diff changeset
100
34
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
101 // primary difference with cons is handling of NULL id (this method returns constant)
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
102 // always makes a copy of an array passed
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
103 public static Nodeid fromBinary(byte[] binaryRepresentation, int offset) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
104 if (binaryRepresentation == null || binaryRepresentation.length - offset < 20) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
105 throw new IllegalArgumentException();
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
106 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
107 int i = 0;
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
108 while (i < 20 && binaryRepresentation[offset+i] == 0) i++;
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
109 if (i == 20) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
110 return NULL;
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
111 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
112 if (offset == 0 && binaryRepresentation.length == 20) {
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
113 return new Nodeid(binaryRepresentation, true);
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
114 }
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
115 byte[] b = new byte[20]; // create new instance if no other reasonable guesses possible
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
116 System.arraycopy(binaryRepresentation, offset, b, 0, 20);
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
117 return new Nodeid(b, false);
51bc56c0addd Static Nodeid creation methods to reuse NULL id
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
118 }
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
119
78
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
120 public static Nodeid fromAscii(String asciiRepresentation) {
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
121 if (asciiRepresentation.length() != 40) {
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
122 throw new IllegalArgumentException();
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
123 }
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
124 // XXX is better impl for String possible?
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
125 return fromAscii(asciiRepresentation.getBytes(), 0, 40);
c25c5c348d1b Skip metadata in the beginning of a file content. Parse metadata, recognize copies/renames
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
126 }
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
127 public static Nodeid fromAscii(byte[] asciiRepresentation, int offset, int length) {
24
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
128 if (length != 40) {
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
129 throw new IllegalArgumentException();
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
130 }
d4fdd1845b3f Nodeid with array of exactly 20 bytes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 22
diff changeset
131 byte[] data = new byte[20];
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
132 boolean zeroBytes = true;
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
133 for (int i = 0, j = offset; i < data.length; i++) {
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
134 int hiNibble = Character.digit(asciiRepresentation[j++], 16);
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
135 int lowNibble = Character.digit(asciiRepresentation[j++], 16);
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
136 byte b = (byte) (((hiNibble << 4) | lowNibble) & 0xFF);
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
137 data[i] = b;
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
138 zeroBytes = zeroBytes && b == 0;
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
139 }
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
140 if (zeroBytes) {
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 28
diff changeset
141 return NULL;
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
142 }
28
b2251b7a9823 Explicit cons arg for clone is more error-prone
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 24
diff changeset
143 return new Nodeid(data, false);
0
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
144 }
dbd663faec1f Basic changelog parsing
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
145 }