Mercurial > jhg

annotate src/org/tmatesoft/hg/core/Nodeid.java @ 141:8248aae33f7d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Adopt FileIterator moving towards WCStatusCollector parameterizing. Improved path handling, move 'em around
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 17 Feb 2011 04:08:34 +0100
parents 26ad21b250e4
children 1a7a9a20e1f9
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
102
a3a2e5deb320 Updated contact address to support@hg4j.com
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 78
diff changeset
15 * contact TMate Software at support@hg4j.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) {
125
26ad21b250e4 Explicit op to tell merge revisions
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
65 return this == o || equalsTo(((Nodeid) o).binaryData);
24
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 }