Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/DiffHelper.java @ 683:98ff1fb49abe

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Update commands to use changeset Nodeid and int in uniform way, clients of core.* classes shall not go back and forth from int to Nodeid
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 24 Jul 2013 16:40:15 +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 }