Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/DigestHelper.java @ 427:31a89587eb04

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
FIXMEs: consistent names, throws for commands and their handlers. Use of checked exceptions in hi-level api
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Thu, 29 Mar 2012 17:14:35 +0200
parents 9c9c442b5f2e
children
rev   line source
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 17
diff changeset
1 /*
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 295
diff changeset
2 * Copyright (c) 2010-2012 TMate Software Ltd
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
3 *
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
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: 42
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: 42
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: 42
diff changeset
7 *
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
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: 42
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: 42
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: 42
diff changeset
11 * GNU General Public License for more details.
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
12 *
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
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: 42
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: 83
diff changeset
15 * contact TMate Software at support@hg4j.com
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
17 package org.tmatesoft.hg.internal;
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import java.io.IOException;
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20 import java.io.InputStream;
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
21 import java.security.MessageDigest;
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
22 import java.security.NoSuchAlgorithmException;
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
23
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
24 import org.tmatesoft.hg.core.Nodeid;
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 295
diff changeset
25 import org.tmatesoft.hg.repo.HgInvalidStateException;
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
26
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
27
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
28 /**
42
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
29 * <pre>
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
30 * DigestHelper dh;
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
31 * dh.sha1(...).asHexString();
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
32 * or
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
33 * dh = dh.sha1(...);
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
34 * nodeid.equalsTo(dh.asBinary());
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
35 * </pre>
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
36 *
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
37 * @author Artem Tikhomirov
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
38 * @author TMate Software Ltd.
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
39 */
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
40 public class DigestHelper {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
41 private MessageDigest sha1;
42
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
42 private byte[] digest;
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
43
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
44 public DigestHelper() {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
45 }
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
46
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
47 private MessageDigest getSHA1() {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
48 if (sha1 == null) {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
49 try {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
50 sha1 = MessageDigest.getInstance("SHA-1");
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
51 } catch (NoSuchAlgorithmException ex) {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
52 // could hardly happen, JDK from Sun always has sha1.
423
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 295
diff changeset
53 HgInvalidStateException t = new HgInvalidStateException("Need SHA-1 algorithm for nodeid calculation");
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 295
diff changeset
54 t.initCause(ex);
9c9c442b5f2e Major refactoring of exception handling. Low-level API uses RuntimeExceptions, while checked are left for higher level
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 295
diff changeset
55 throw t;
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
56 }
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
57 }
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
58 return sha1;
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
59 }
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
60
41
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
61
42
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
62 public DigestHelper sha1(Nodeid nodeid1, Nodeid nodeid2, byte[] data) {
74
6f1b88693d48 Complete refactoring to org.tmatesoft
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 42
diff changeset
63 return sha1(nodeid1.toByteArray(), nodeid2.toByteArray(), data);
41
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
64 }
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
65
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
66 // sha1_digest(min(p1,p2) ++ max(p1,p2) ++ final_text)
42
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
67 public DigestHelper sha1(byte[] nodeidParent1, byte[] nodeidParent2, byte[] data) {
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
68 MessageDigest alg = getSHA1();
41
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
69 if ((nodeidParent1[0] & 0x00FF) < (nodeidParent2[0] & 0x00FF)) {
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
70 alg.update(nodeidParent1);
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
71 alg.update(nodeidParent2);
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
72 } else {
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
73 alg.update(nodeidParent2);
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
74 alg.update(nodeidParent1);
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
75 }
42
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
76 digest = alg.digest(data);
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
77 assert digest.length == 20;
42
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
78 return this;
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
79 }
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
80
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
81 public String asHexString() {
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
82 if (digest == null) {
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
83 throw new IllegalStateException("Shall init with sha1() call first");
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
84 }
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
85 return toHexString(digest, 0, digest.length);
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
86 }
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
87
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
88 // by reference, be careful not to modify (or #clone() if needed)
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
89 public byte[] asBinary() {
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
90 if (digest == null) {
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
91 throw new IllegalStateException("Shall init with sha1() call first");
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
92 }
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
93 return digest;
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
94 }
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
95
41
858d1b2458cb Check integrity for bundle changelog. Sort nodeids when calculating hash
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 31
diff changeset
96 // XXX perhaps, digest functions should throw an exception, as it's caller responsibility to deal with eof, etc
42
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
97 public DigestHelper sha1(InputStream is /*ByteBuffer*/) throws IOException {
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
98 MessageDigest alg = getSHA1();
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
99 byte[] buf = new byte[1024];
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
100 int c;
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
101 while ((c = is.read(buf)) != -1) {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
102 alg.update(buf, 0, c);
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
103 }
42
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
104 digest = alg.digest();
92c3d0920d58 Real integrity check, with exception. DigestHelper refactored to accomodate new needs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 41
diff changeset
105 return this;
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
106 }
83
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
107
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
108 public DigestHelper sha1(CharSequence... seq) {
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
109 MessageDigest alg = getSHA1();
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
110 for (CharSequence s : seq) {
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
111 byte[] b = s.toString().getBytes();
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
112 alg.update(b);
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
113 }
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
114 digest = alg.digest();
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
115 return this;
a5275143664c Complete path hash calculation of fncache requirement
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 74
diff changeset
116 }
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
117
31
346b66add79d Basic lookup for incoming changes
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 17
diff changeset
118 public static String toHexString(byte[] data, final int offset, final int count) {
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
119 char[] result = new char[count << 1];
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
120 final String hexDigits = "0123456789abcdef";
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
121 final int end = offset+count;
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
122 for (int i = offset, j = 0; i < end; i++) {
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
123 result[j++] = hexDigits.charAt((data[i] >>> 4) & 0x0F);
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
124 result[j++] = hexDigits.charAt(data[i] & 0x0F);
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
125 }
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
126 return new String(result);
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
127 }
266
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
128
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
129 public static boolean ascii2bin(byte[] ascii, int offset, int len, byte[] binary) {
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
130 assert len % 2 == 0;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
131 assert binary.length >= len >>> 1;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
132
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
133 boolean zeroBytes = true;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
134 for (int i = 0, j = offset; i < len >>> 1; i++) {
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
135 int b = ascii[j++] & 0xCF; // -0x30 to get decimal digit out from their char, and to uppercase if a letter
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
136 int hiNibble = b > 64 ? b - 55 : b;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
137 b = ascii[j++] & 0xCF;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
138 int lowNibble = b > 64 ? b - 55 : b;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
139 if (hiNibble >= 16 || lowNibble >= 16) {
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
140 throw new IllegalArgumentException(String.format("Characters '%c%c' (%1$d and %2$d) at index %d are not valid hex digits", ascii[j-2], ascii[j-1], j-2));
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
141 }
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
142 b = (((hiNibble << 4) | lowNibble) & 0xFF);
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
143 binary[i] = (byte) b;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
144 zeroBytes = zeroBytes && b == 0;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
145 }
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
146 return zeroBytes;
0a2f445de774 Improve manifest parsing: reduce number of arrays instantiated for Nodeid
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 102
diff changeset
147 }
9
d6d2a630f4a6 Access to underlaying file data wrapped into own Access object, implemented with FileChannel and ByteBuffer
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
148 }