Mercurial > jhg

annotate src/org/tmatesoft/hg/internal/DiffHelper.java @ 694:7efabe0cddcf

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Speed up (a) file rename history to minimize file reads; (b) file.isCopy(int) to read metadata for few revisions at once (use pattern assumes earlier revisions are likely to be queried, too); (c) HgIgnore.isIgnored by caching matched initial fragments (to substitute more expensive Matcher.matches with cheaper HashMap.contains)
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 05 Aug 2013 17:42:10 +0200
parents 58a6900f845d
children
rev   line source
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
2 * Copyright (c) 2013 TMate Software Ltd
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 *
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 *
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
12 *
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
17 package org.tmatesoft.hg.internal;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import java.util.ArrayList;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20 import java.util.HashMap;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
21 import java.util.Map;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
22
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
23 /**
538
dd4f6311af52 Commit: first working version
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
24 * Mercurial cares about changes only up to the line level, e.g. a simple file version dump in manifest looks like (RevlogDump output):
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25 *
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 * 522: 233748 0 103 17438 433 522 521 -1 756073cf2321df44d3ed0585f2a5754bc8a1b2f6
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
27 * <PATCH>:
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
28 * 3487..3578, 91:src/org/tmatesoft/hg/core/HgIterateDirection.java\00add61a8a665c5d8f092210767f812fe0d335ac8
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
29 *
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30 * I.e. for the {fname}{revision} entry format of manifest, not only {revision} is changed, but the whole line, with unchanged {fname} is recorded
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 * in the patch.
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
32 *
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
33 * Mercurial paper describes reasons for choosing this approach to delta generation, too.
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34 *
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
35 *
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
36 * @author Artem Tikhomirov
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
37 * @author TMate Software Ltd.
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
38 */
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
39 public class DiffHelper<T extends DiffHelper.ChunkSequence<?>> {
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
40
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
41 private Map<Object, IntVector> chunk2UseIndex;
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
42 private T seq1, seq2;
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
43
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
44 // get filled by #longestMatch, track start of common sequence in seq1 and seq2, respectively
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
45 private int matchStartS1, matchStartS2;
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
46
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
47 private MatchInspector<T> matchInspector;
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
48
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
49 public void init(T s1, T s2) {
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
50 seq1 = s1;
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
51 seq2 = s2;
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
52 prepare(s2);
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
53 }
549
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
54
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
55 public void init(T s1) {
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
56 if (seq2 == null) {
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
57 throw new IllegalStateException("Use this #init() only when target sequence shall be matched against different origin");
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
58 }
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
59 seq1 = s1;
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
60 }
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
61
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
62
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
63 private void prepare(T s2) {
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
64 chunk2UseIndex = new HashMap<Object, IntVector>();
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
65 for (int i = 0, len = s2.chunkCount(); i < len; i++) {
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
66 Object bc = s2.chunk(i);
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
67 IntVector loc = chunk2UseIndex.get(bc);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
68 if (loc == null) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
69 chunk2UseIndex.put(bc, loc = new IntVector());
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
70 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
71 loc.add(i);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
72 // bc.registerUseIn(i) - BEWARE, use of bc here is incorrect
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
73 // in this case need to find the only ByteChain to keep indexes
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
74 // i.e. when there are few equal ByteChain instances, notion of "usedIn" shall be either shared (reference same vector)
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
75 // or kept within only one of them
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
76 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
77 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
78
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
79 public void findMatchingBlocks(MatchInspector<T> insp) {
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
80 insp.begin(seq1, seq2);
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
81 matchInspector = insp;
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
82 findMatchingBlocks(0, seq1.chunkCount(), 0, seq2.chunkCount());
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
83 insp.end();
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
84 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
85
680
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
86 /**
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
87 * look up every line in s2 that match lines in s1
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
88 * idea: pure additions in s2 are diff-ed against s1 again and again, to see if there are any matches
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
89 */
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
90 void findAllMatchAlternatives(final MatchInspector<T> insp) {
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
91 assert seq1.chunkCount() > 0;
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
92 final IntSliceSeq insertions = new IntSliceSeq(2);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
93 final boolean matchedAny[] = new boolean[] {false};
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
94 DeltaInspector<T> myInsp = new DeltaInspector<T>() {
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
95 @Override
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
96 protected void unchanged(int s1From, int s2From, int length) {
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
97 matchedAny[0] = true;
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
98 insp.match(s1From, s2From, length);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
99 }
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
100 @Override
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
101 protected void added(int s1InsertPoint, int s2From, int s2To) {
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
102 insertions.add(s2From, s2To);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
103 }
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
104 };
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
105 matchInspector = myInsp;
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
106 myInsp.begin(seq1, seq2);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
107 IntSliceSeq s2RangesToCheck = new IntSliceSeq(2, 1, 0);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
108 s2RangesToCheck.add(0, seq2.chunkCount());
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
109 do {
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
110 IntSliceSeq nextCheck = new IntSliceSeq(2);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
111 for (IntTuple t : s2RangesToCheck) {
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
112 int s2Start = t.at(0);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
113 int s2End = t.at(1);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
114 myInsp.changeStartS1 = 0;
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
115 myInsp.changeStartS2 = s2Start;
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
116 insp.begin(seq1, seq2);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
117 matchedAny[0] = false;
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
118 findMatchingBlocks(0, seq1.chunkCount(), s2Start, s2End);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
119 insp.end();
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
120 myInsp.end();
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
121 if (matchedAny[0]) {
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
122 nextCheck.addAll(insertions);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
123 }
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
124 insertions.clear();
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
125 }
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
126 s2RangesToCheck = nextCheck;
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
127 } while (s2RangesToCheck.size() > 0);
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
128 }
58a6900f845d Blame: alternative strategy to handle merge revisions: map(diff(p1->base->p2)) to understand merge intentions better
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 624
diff changeset
129
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
130 /**
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
131 * implementation based on Python's difflib.py and SequenceMatcher
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
132 */
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
133 public int longestMatch(int startS1, int endS1, int startS2, int endS2) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
134 matchStartS1 = matchStartS2 = 0;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
135 int maxLength = 0;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
136 IntMap<Integer> chunkIndex2MatchCount = new IntMap<Integer>(8);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
137 for (int i = startS1; i < endS1; i++) {
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
138 Object bc = seq1.chunk(i);
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
139 IntVector occurencesInS2 = chunk2UseIndex.get(bc);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
140 if (occurencesInS2 == null) {
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
141 chunkIndex2MatchCount.clear();
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
142 continue;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
143 }
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
144 IntMap<Integer> newChunkIndex2MatchCount = new IntMap<Integer>(8);
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
145 for (int j : occurencesInS2.toArray()) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
146 // s1[i] == s2[j]
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
147 if (j < startS2) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
148 continue;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
149 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
150 if (j >= endS2) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
151 break;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
152 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
153 int prevChunkMatches = chunkIndex2MatchCount.containsKey(j-1) ? chunkIndex2MatchCount.get(j-1) : 0;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
154 int k = prevChunkMatches + 1;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
155 newChunkIndex2MatchCount.put(j, k);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
156 if (k > maxLength) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
157 matchStartS1 = i-k+1;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
158 matchStartS2 = j-k+1;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
159 maxLength = k;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
160 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
161 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
162 chunkIndex2MatchCount = newChunkIndex2MatchCount;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
163 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
164 return maxLength;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
165 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
166
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
167 private void findMatchingBlocks(int startS1, int endS1, int startS2, int endS2) {
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
168 int matchLength = longestMatch(startS1, endS1, startS2, endS2);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
169 if (matchLength > 0) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
170 final int saveStartS1 = matchStartS1, saveStartS2 = matchStartS2;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
171 if (startS1 < matchStartS1 && startS2 < matchStartS2) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
172 findMatchingBlocks(startS1, matchStartS1, startS2, matchStartS2);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
173 }
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
174 matchInspector.match(saveStartS1, saveStartS2, matchLength);
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
175 if (saveStartS1+matchLength < endS1 && saveStartS2+matchLength < endS2) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
176 findMatchingBlocks(saveStartS1 + matchLength, endS1, saveStartS2 + matchLength, endS2);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
177 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
178 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
179 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
180
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
181 public interface MatchInspector<T extends ChunkSequence<?>> {
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
182 void begin(T s1, T s2);
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
183 void match(int startSeq1, int startSeq2, int matchLength);
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
184 void end();
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
185 }
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
186
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
187 static class MatchDumpInspector<T extends ChunkSequence<?>> implements MatchInspector<T> {
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
188 private int matchCount;
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
189
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
190 public void begin(T s1, T s2) {
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
191 matchCount = 0;
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
192 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
193
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
194 public void match(int startSeq1, int startSeq2, int matchLength) {
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
195 matchCount++;
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
196 System.out.printf("match #%d: from line #%d and line #%d of length %d\n", matchCount, startSeq1, startSeq2, matchLength);
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
197 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
198
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
199 public void end() {
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
200 if (matchCount == 0) {
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
201 System.out.println("NO MATCHES FOUND!");
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
202 }
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
203 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
204 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
205
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
206 /**
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
207 * Matcher implementation that translates "match/equal" notification to a delta-style "added/removed/changed".
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
208 */
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
209 public static class DeltaInspector<T extends ChunkSequence<?>> implements MatchInspector<T> {
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
210 protected int changeStartS1, changeStartS2;
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
211 protected T seq1, seq2;
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
212
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
213 public void begin(T s1, T s2) {
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
214 seq1 = s1;
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
215 seq2 = s2;
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
216 changeStartS1 = changeStartS2 = 0;
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
217 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
218
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
219 public void match(int startSeq1, int startSeq2, int matchLength) {
542
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
220 reportDeltaElement(startSeq1, startSeq2, matchLength);
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
221 changeStartS1 = startSeq1 + matchLength;
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
222 changeStartS2 = startSeq2 + matchLength;
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
223 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
224
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
225 public void end() {
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
226 if (changeStartS1 < seq1.chunkCount()-1 || changeStartS2 < seq2.chunkCount()-1) {
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
227 reportDeltaElement(seq1.chunkCount()-1, seq2.chunkCount()-1, 0);
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
228 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
229 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
230
542
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
231 protected void reportDeltaElement(int matchStartSeq1, int matchStartSeq2, int matchLength) {
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
232 if (changeStartS1 < matchStartSeq1) {
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
233 if (changeStartS2 < matchStartSeq2) {
542
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
234 changed(changeStartS1, matchStartSeq1, changeStartS2, matchStartSeq2);
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
235 } else {
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
236 assert changeStartS2 == matchStartSeq2;
543
1e95f48d9886 Report line index for insertion and deletion, test against 'hg diff' output
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 542
diff changeset
237 deleted(matchStartSeq2, changeStartS1, matchStartSeq1);
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
238 }
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
239 } else {
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
240 assert changeStartS1 == matchStartSeq1;
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
241 if(changeStartS2 < matchStartSeq2) {
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
242 added(changeStartS1, changeStartS2, matchStartSeq2);
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
243 } else {
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
244 assert changeStartS2 == matchStartSeq2;
549
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
245 if (matchStartSeq1 > 0 || matchStartSeq2 > 0) {
624
507602cb4fb3 FIXMEs and TODOs: pay some technical debt
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
246 assert false : String.format("adjustent equal blocks %d, %d and %d,%d", changeStartS1, matchStartSeq1, changeStartS2, matchStartSeq2);
549
83afa680555d Annotate merge revision (combined diff against two parents without looking further)
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 545
diff changeset
247 }
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
248 }
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
249 }
542
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
250 if (matchLength > 0) {
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
251 unchanged(matchStartSeq1, matchStartSeq2, matchLength);
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
252 }
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
253 }
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
254
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
255 /**
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
256 * [s1From..s1To) replaced with [s2From..s2To)
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
257 */
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
258 protected void changed(int s1From, int s1To, int s2From, int s2To) {
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
259 // NO-OP
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
260 }
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
261
543
1e95f48d9886 Report line index for insertion and deletion, test against 'hg diff' output
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 542
diff changeset
262 protected void deleted(int s2DeletePoint, int s1From, int s1To) {
542
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
263 // NO-OP
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
264 }
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
265
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
266 protected void added(int s1InsertPoint, int s2From, int s2To) {
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
267 // NO-OP
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
268 }
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
269
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
270 protected void unchanged(int s1From, int s2From, int length) {
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
271 // NO-OP
541
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
272 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
273 }
946b13196252 PatchGenerator: refactoring to facilitate use in annotate/blame
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 538
diff changeset
274
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 556
diff changeset
275 public static class DeltaDumpInspector<T extends ChunkSequence<?>> extends DeltaInspector<T> {
542
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
276
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
277 @Override
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
278 protected void changed(int s1From, int s1To, int s2From, int s2To) {
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
279 System.out.printf("changed [%d..%d) with [%d..%d)\n", s1From, s1To, s2From, s2To);
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
280 }
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
281
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
282 @Override
543
1e95f48d9886 Report line index for insertion and deletion, test against 'hg diff' output
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 542
diff changeset
283 protected void deleted(int s2DeletionPoint, int s1From, int s1To) {
542
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
284 System.out.printf("deleted [%d..%d)\n", s1From, s1To);
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
285 }
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
286
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
287 @Override
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
288 protected void added(int s1InsertPoint, int s2From, int s2To) {
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
289 System.out.printf("added [%d..%d) at %d\n", s2From, s2To, s1InsertPoint);
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
290 }
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
291
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
292 @Override
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
293 protected void unchanged(int s1From, int s2From, int length) {
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
294 System.out.printf("same [%d..%d) and [%d..%d)\n", s1From, s1From + length, s2From, s2From + length);
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
295 }
542
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
296 }
a71a05ec11bc Towards annotate/blame support: general outline of the functionality
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 541
diff changeset
297
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
298 /**
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
299 * Generic sequence of chunk, where chunk is anything comparable to another chunk, e.g. a string or a single char
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
300 * Sequence diff algorithm above doesn't care about sequence nature.
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
301 */
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
302 public interface ChunkSequence<T> {
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
303 public T chunk(int index);
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
304 public int chunkCount();
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
305 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
306
551
4ea0351ca878 Better (precise) name for diff facility, tests
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 549
diff changeset
307 public static final class LineSequence implements ChunkSequence<LineSequence.ByteChain> {
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
308
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
309 private final byte[] input;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
310 private ArrayList<ByteChain> lines;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
311
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
312 public LineSequence(byte[] data) {
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
313 input = data;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
314 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
315
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
316 public static LineSequence newlines(byte[] array) {
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
317 return new LineSequence(array).splitByNewlines();
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
318 }
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
319
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
320 // sequence ends with fake, empty line chunk
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
321 public LineSequence splitByNewlines() {
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
322 lines = new ArrayList<ByteChain>();
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
323 int lastStart = 0;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
324 for (int i = 0; i < input.length; i++) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
325 if (input[i] == '\n') {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
326 lines.add(new ByteChain(lastStart, i+1));
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
327 lastStart = i+1;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
328 } else if (input[i] == '\r') {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
329 if (i+1 < input.length && input[i+1] == '\n') {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
330 i++;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
331 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
332 lines.add(new ByteChain(lastStart, i+1));
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
333 lastStart = i+1;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
334 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
335 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
336 if (lastStart < input.length) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
337 lines.add(new ByteChain(lastStart, input.length));
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
338 }
538
dd4f6311af52 Commit: first working version
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
339 // empty chunk to keep offset of input end
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
340 lines.add(new ByteChain(input.length));
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
341 return this;
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
342 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
343
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
344 public ByteChain chunk(int index) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
345 return lines.get(index);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
346 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
347
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
348 public int chunkCount() {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
349 return lines.size();
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
350 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
351
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
352 public byte[] data(int chunkFrom, int chunkTo) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
353 if (chunkFrom == chunkTo) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
354 return new byte[0];
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
355 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
356 int from = chunk(chunkFrom).getOffset(), to = chunk(chunkTo).getOffset();
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
357 byte[] rv = new byte[to - from];
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
358 System.arraycopy(input, from, rv, 0, rv.length);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
359 return rv;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
360 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
361
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
362
556
e55f17a7a195 AnnotateFacility renamed to HgBlameFacility and exposed, API shapes out and got some javadoc
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 551
diff changeset
363 public final class ByteChain {
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
364 private final int start, end;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
365 private final int hash;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
366
545
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
367 /**
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
368 * construct a chunk with a sole purpose to keep
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
369 * offset of the data end
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
370 */
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
371 ByteChain(int offset) {
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
372 start = end = offset;
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
373 // ensure this chunk doesn't match trailing chunk of another sequence
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
374 hash = System.identityHashCode(this);
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
375 }
15b406c7cd9d First round of annotate file is functional
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 544
diff changeset
376
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
377 ByteChain(int s, int e) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
378 start = s;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
379 end = e;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
380 hash = calcHash(input, s, e);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
381 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
382
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
383 /**
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
384 * byte offset of the this ByteChain inside ChainSequence
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
385 */
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
386 public int getOffset() {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
387 return start;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
388 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
389
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
390 public byte[] data() {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
391 byte[] rv = new byte[end - start];
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
392 System.arraycopy(input, start, rv, 0, rv.length);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
393 return rv;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
394 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
395
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
396 @Override
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
397 public boolean equals(Object obj) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
398 if (obj == null || obj.getClass() != ByteChain.class) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
399 return false;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
400 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
401 ByteChain other = (ByteChain) obj;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
402 if (other.hash != hash || other.end - other.start != end - start) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
403 return false;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
404 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
405 return other.match(input, start);
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
406 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
407
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
408 private boolean match(byte[] oi, int from) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
409 for (int i = start, j = from; i < end; i++, j++) {
544
7f5998a9619d Refactor PatchGenerator to be generic and welcome sequence of any nature
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 543
diff changeset
410 if (LineSequence.this.input[i] != oi[j]) {
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
411 return false;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
412 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
413 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
414 return true;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
415 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
416
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
417 @Override
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
418 public int hashCode() {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
419 return hash;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
420 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
421
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
422 @Override
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
423 public String toString() {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
424 return String.format("[@%d\"%s\"]", start, new String(data()));
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
425 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
426 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
427
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
428 // same as Arrays.hashCode(byte[]), just for a slice of a bigger array
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
429 static int calcHash(byte[] data, int from, int to) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
430 int result = 1;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
431 for (int i = from; i < to; i++) {
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
432 result = 31 * result + data[i];
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
433 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
434 return result;
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
435 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
436 }
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
437 }