Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/Patch.java @ 463:a0507a9f3da0 smartgit3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Initial support for MqExtension
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 20 Jun 2012 21:16:21 +0200
parents 9747a786a34d
children 7f136a3fa671
rev   line source
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
2 * Copyright (c) 2011 TMate Software Ltd
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
3 *
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
4 * This program is free software; you can redistribute it and/or modify
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
5 * it under the terms of the GNU General Public License as published by
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
6 * the Free Software Foundation; version 2 of the License.
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
7 *
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
8 * This program is distributed in the hope that it will be useful,
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
11 * GNU General Public License for more details.
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
12 *
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
13 * For information on how to redistribute this software under
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
14 * the terms of a license other than GNU General Public License
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
15 * contact TMate Software at support@hg4j.com
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
16 */
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
17 package org.tmatesoft.hg.internal;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
18
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
19 import java.io.IOException;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
20 import java.util.ArrayList;
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
21 import java.util.Formatter;
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
22
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
23 /**
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
24 * @see http://mercurial.selenic.com/wiki/BundleFormat, in Changelog group description
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
25 *
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 * range [start..end] in original source gets replaced with data of length (do not keep, use data.length instead)
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
27 * range [end(i)..start(i+1)] is copied from the source
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
28 *
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
29 * @author Artem Tikhomirov
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30 * @author TMate Software Ltd.
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 */
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
32 public final class Patch {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
33 private final IntVector starts, ends;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34 private final ArrayList<byte[]> data;
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
35
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
36 private static byte[] generate(int c) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
37 byte[] rv = new byte[c];
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
38 for (int i = 0; i < c; i++) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
39 byte x = (byte) ('a' + i);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
40 rv[i] = x;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
41 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
42 return rv;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
43 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
44
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
45 public static void main(String[] args) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
46 Patch p1 = new Patch(), p2 = new Patch();
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
47 // simple cases (one element in either patch)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
48 // III: (1,10 20) & (5,15,15) p2End from [p1End..p1AppliedEnd] (i.e. within p1 range but index is past p2 end index)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
49 // II: (1,10,7) & (3,15,15) insideP2 = true and no more p1 entries
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
50 // II: (1,1,10) & (3,11,15)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
51 // independent: (1,10,10) & (15,25,10); (15, 25, 10) & (1, 10, 10)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
52 // I: (15, 25, 10) & (10, 20, 10). result: [10, 20, 10] [20, 25, 5]
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
53 // IV: (15, 25, 10) & (10, 30, 20)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
54 //
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
55 // cycle with insideP2
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
56 //
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
57 // cycle with insideP1
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
58 //
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
59 // multiple elements in patches (offsets)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
60 p1.add(15, 25, generate(10));
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
61 p2.add(10, 30, generate(20));
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
62 System.out.println("p1: " + p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
63 System.out.println("p2: " + p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
64 Patch r = p1.apply(p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
65 System.out.println("r: " + r);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
66 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
67
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
68 public Patch() {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
69 starts = new IntVector();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
70 ends = new IntVector();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
71 data = new ArrayList<byte[]>();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
72 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
73
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
74 public String toString() {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
75 StringBuilder sb = new StringBuilder();
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
76 Formatter f = new Formatter(sb);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
77 for (int i = 0; i < count(); i++) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
78 f.format("[%d, %d, %d] ", starts.get(i), ends.get(i), data.get(i).length);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
79 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
80 return sb.toString();
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
81 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
82
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
83 public int count() {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
84 return data.size();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
85 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
86
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
87 // number of bytes this patch will add (or remove, if negative) from the base revision
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
88 private int patchSizeDelta() {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
89 int rv = 0;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
90 int prevEnd = 0;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
91 for (int i = 0, x = data.size(); i < x; i++) {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
92 final int start = starts.get(i);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
93 final int len = data.get(i).length;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
94 rv += start - prevEnd; // would copy from original
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
95 rv += len; // and add new
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
96 prevEnd = ends.get(i);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
97 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
98 rv -= prevEnd;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
99 return rv;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
100 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
101
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
102 public byte[] apply(DataAccess baseRevisionContent, int outcomeLen) throws IOException {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
103 if (outcomeLen == -1) {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
104 outcomeLen = baseRevisionContent.length() + patchSizeDelta();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
105 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
106 int prevEnd = 0, destIndex = 0;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
107 byte[] rv = new byte[outcomeLen];
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
108 for (int i = 0, x = data.size(); i < x; i++) {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
109 final int start = starts.get(i);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
110 baseRevisionContent.seek(prevEnd);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
111 // copy source bytes that were not modified (up to start of the record)
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
112 baseRevisionContent.readBytes(rv, destIndex, start - prevEnd);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
113 destIndex += start - prevEnd;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
114 // insert new data from the patch, if any
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
115 byte[] d = data.get(i);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
116 System.arraycopy(d, 0, rv, destIndex, d.length);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
117 destIndex += d.length;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
118 prevEnd = ends.get(i);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
119 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
120 baseRevisionContent.seek(prevEnd);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
121 // copy everything in the source past last record's end
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
122 baseRevisionContent.readBytes(rv, destIndex, (int) (baseRevisionContent.length() - prevEnd));
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
123 return rv;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
124 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
125
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
126 public void clear() {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
127 starts.clear();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
128 ends.clear();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
129 data.clear();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
130 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
131
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
132 /**
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
133 * Initialize instance from stream. Any previous patch information (i.e. if instance if reused) is cleared first.
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
134 * Read up to the end of DataAccess and interpret data as patch records.
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
135 */
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
136 public void read(DataAccess da) throws IOException {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
137 clear();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
138 while (!da.isEmpty()) {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
139 readOne(da);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
140 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
141 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
142
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
143 /**
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
144 * Caller is responsible to ensure stream got some data to read
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
145 */
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
146 public void readOne(DataAccess da) throws IOException {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
147 int s = da.readInt();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
148 int e = da.readInt();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
149 int len = da.readInt();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
150 byte[] src = new byte[len];
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
151 da.readBytes(src, 0, len);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
152 starts.add(s);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
153 ends.add(e);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
154 data.add(src);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
155 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
156
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
157 private void add(Patch p, int i) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
158 add(p.starts.get(i), p.ends.get(i), p.data.get(i));
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
159 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
160
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
161 private void add(int start, int end, byte[] d) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
162 starts.add(start);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
163 ends.add(end);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
164 data.add(d);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
165 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
166
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
167 private static byte[] subarray(byte[] d, int start, int end) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
168 byte[] r = new byte[end-start+1];
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
169 System.arraycopy(d, start, r, 0, r.length);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
170 return r;
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
171 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
172
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
173 /**
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
174 * Modify this patch with subsequent patch
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
175 */
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
176 private /*SHALL BE PUBLIC ONCE TESTING ENDS*/ Patch apply(Patch another) {
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
177 Patch r = new Patch();
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
178 int p1TotalAppliedDelta = 0; // value to add to start and end indexes of the older patch to get their values as if
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
179 // in the patched text, iow, directly comparable with respective indexes from the newer patch.
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
180 int p1EntryStart = 0, p1EntryEnd = 0, p1EntryLen = 0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
181 byte[] p1Data = null;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
182 boolean insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
183 int p2 = 0, p1 = 0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
184 final int p2Max = another.count(), p1Max = this.count();
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
185 L0: for (; p2 < p2Max; p2++) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
186 int p2EntryStart = another.starts.get(p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
187 int p2EntryEnd = another.ends.get(p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
188 final int p2EntryRange = p2EntryEnd - p2EntryStart;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
189 final byte[] p2Data = another.data.get(p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
190 boolean insideP2entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
191 int p2EntryStartOffset = -1;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
192 ///
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
193 p1EntryStart = p1EntryEnd = p1EntryLen = 0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
194 p1Data = null;
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
195
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
196 L1: while (p1 < p1Max) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
197 if (!insideP1entry) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
198 p1EntryStart = starts.get(p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
199 p1EntryEnd = ends.get(p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
200 p1Data = data.get(p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
201 p1EntryLen = p1Data.length;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
202 }// else keep values
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
203
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
204 final int p1EntryDelta = p1EntryLen - (p1EntryEnd - p1EntryStart); // number of actually inserted(+) or deleted(-) chars
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
205 final int p1EntryAppliedStart = p1TotalAppliedDelta + p1EntryStart;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
206 final int p1EntryAppliedEnd = p1EntryAppliedStart + p1EntryLen; // end of j'th patch entry in the text which is source for p2
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
207
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
208 if (insideP2entry) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
209 if (p2EntryEnd < p1EntryAppliedStart) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
210 r.add(p2EntryStart - p2EntryStartOffset, p2EntryEnd - p1TotalAppliedDelta, p2Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
211 insideP2entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
212 continue L0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
213 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
214 if (p2EntryEnd >= p1EntryAppliedEnd) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
215 // when p2EntryEnd == p1EntryAppliedEnd, I assume p1TotalAppliedDelta can't be used for p2EntryEnd to get it to p1 range, but rather shall be
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
216 // augmented with current p1 entry and at the next p1 entry (likely to hit p1EntryAppliedStart > p2EntryEnd above) would do the rest
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
217 insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
218 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
219 p1TotalAppliedDelta += p1EntryDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
220 continue L1;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
221 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
222 // p1EntryAppliedStart <= p2EntryEnd < p1EntryAppliedEnd
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
223 r.add(p2EntryStart - p2EntryStartOffset, p2EntryEnd - p1TotalAppliedDelta, p2Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
224 p1EntryStart = p2EntryEnd - p1TotalAppliedDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
225 final int p1DataPartShift = p2EntryEnd - p1EntryAppliedStart + 1;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
226 if (p1DataPartShift >= p1EntryLen) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
227 p1EntryLen = 0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
228 p1Data = new byte[0];
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
229 } else {
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
230 p1EntryLen -= p1DataPartShift;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
231 p1Data = subarray(p1Data, p1DataPartShift, p1Data.length);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
232 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
233 insideP1entry = true;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
234 insideP2entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
235 continue L0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
236 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
237
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
238 if (p1EntryAppliedStart < p2EntryStart) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
239 if (p1EntryAppliedEnd <= p2EntryStart) { // p1EntryAppliedEnd in fact index of the first char *after* patch
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
240 // completely independent, copy and continue
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
241 r.add(p1EntryStart, p1EntryEnd, p1Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
242 insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
243 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
244 // fall-through to get p1TotalAppliedDelta incremented
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
245 } else { // SKETCH: II or III
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
246 // remember, p1EntryDelta may be negative
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
247 // shall break j'th entry into few
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
248 // fix p1's end/length
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
249 // p1EntryAppliedStart < p2EntryStart < p1EntryAppliedEnd
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
250 int s = p2EntryStart - p1TotalAppliedDelta; // p2EntryStart in p1 scale. Is within p1 range
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
251 if (s > p1EntryEnd) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
252 s = p1EntryEnd;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
253 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
254 int p1DataPartEnd = p2EntryStart - p1EntryAppliedStart; // index, not count. <= (p1EntryEnd-p1EntryStart).
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
255 // add what left from p1
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
256 if (p1DataPartEnd < p1EntryLen) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
257 r.add(p1EntryStart, s, subarray(p1Data, 0, p1DataPartEnd));
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
258 } else {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
259 p1DataPartEnd = p1EntryLen-1; // record factual number of p1 bytes we consumed.
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
260 r.add(p1EntryStart, s, p1Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
261 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
262 p1TotalAppliedDelta += p1DataPartEnd - (s - p1EntryStart); // (s2 - (s1+delta)) - (s2 - delta - s1) = s2-s1-delta-s2+delta+s1 = 0, unless p1DataPartEnd >= p1Data.length
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
263 p1EntryLen -= (p1DataPartEnd+1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
264 if (p2EntryEnd < p1EntryAppliedEnd) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
265 // SKETCH: III
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
266 insideP1entry = true;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
267 // p2 completely fits into changes of p1
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
268 int e = p2EntryEnd - p1TotalAppliedDelta; // p2EntryEnd in p1 scale
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
269 if (e > p1EntryEnd) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
270 // any index past p1 end shall be calculated with respect to p1 end, thus it's unsafe to go past p1 end (there may be more p1 entries there)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
271 e = p1EntryEnd;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
272 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
273 r.add(s, e, p2Data); // add p2
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
274 // modify p1 leftover
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
275 p1EntryStart = e;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
276 if (p2EntryRange >= p1EntryLen) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
277 p1EntryLen = 0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
278 p1Data = new byte[0];
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
279 } else {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
280 p1Data = subarray(p1Data, p1DataPartEnd + p2EntryRange, p1Data.length-1 /*up to the last one*/);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
281 p1EntryLen -= p2EntryRange;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
282 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
283 // p2 is handled, but there are leftovers of p1
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
284 continue L0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
285 } else { // p2EntryEnd >= p1EntryAppliedEnd
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
286 // SKETCH: II
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
287 insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
288 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
289 if (p1EntryAppliedStart + p1EntryDelta >= p2EntryEnd) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
290 // here we know next p1 entry would be past p2 entry and thus can put p2 right away
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
291 r.add(p2EntryStart - p1TotalAppliedDelta, p1EntryEnd, p2Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
292 p1TotalAppliedDelta += p1EntryDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
293 continue L0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
294 } else {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
295 // there are chances there are more p1 entries till p2 ends
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
296 insideP2entry = true;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
297 p2EntryStartOffset = p1TotalAppliedDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
298 // p2EntryEnd is past delta, no chances for p1Data leftovers to be in use
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
299 // p2 processing is not over, need to fix end, depending on what else fits into p2 range (if nothing, can put p2.end right away)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
300 // fall-through to get p1TotalAppliedDelta incremented;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
301 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
302 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
303 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
304 } else { // p1EntryAppliedStart >= p2EntryStart
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
305 if (p2EntryEnd < p1EntryAppliedStart) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
306 // newer patch completely fits between two older patches
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
307 r.add(p2EntryStart - p1TotalAppliedDelta, p2EntryEnd - p1TotalAppliedDelta, p2Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
308 // SHALL NOT increment p1TotalAppliedDelta as we didn't use any of p1
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
309 continue L0; // next p2
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
310 } else { // p2EntryEnd >= p1EntryAppliedStart
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
311 // SKETCH: I or IV
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
312 // p2EntryEnd is either < p1EntryAppliedEnd or past it
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
313 if (p2EntryEnd <= p1EntryAppliedEnd) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
314 // SKETCH: I: copy p2, strip p1 to start from p2EntryEnd, next i (p2)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
315 insideP1entry = true;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
316 int e = p2EntryEnd - p1TotalAppliedDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
317 if (e > p1EntryEnd) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
318 e = p1EntryEnd; // added by analogy with above. Is needed?
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
319 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
320 r.add(p2EntryStart - p1TotalAppliedDelta, e, p2Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
321 p1EntryStart = e;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
322 int p1DataShift = p2EntryEnd - p1EntryAppliedStart;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
323 if (p1DataShift >= p1EntryLen) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
324 p1EntryLen = 0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
325 p1Data = new byte[0];
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
326 } else {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
327 p1EntryLen -= p1DataShift;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
328 p1Data = subarray(p1Data, p1DataShift, p1Data.length - 1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
329 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
330 // p1TotalAppliedDelta would get incremented once this modified p1 is handled
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
331 continue L0; // next p2;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
332 } else {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
333 // p2EntryEnd > p1EntryAppliedEnd
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
334 // SKETCH IV: skip (rest of) p1 completely, continue the same unless found p1 with start or end past p2EntryEnd.
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
335 insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
336 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
337 insideP2entry = true;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
338 p2EntryStartOffset = p1TotalAppliedDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
339 // fall-through to get p1TotalAppliedDelta incremented
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
340 }
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
341 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
342 }
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
343 p1TotalAppliedDelta += p1EntryDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
344 } // while (p1 < p1Max)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
345 {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
346 // no more p1 entries, shall close p2 (if it's handled, code above jumps directly to L0)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
347 // regardless of whether insideP2 is .t
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
348 int s = p2EntryStart;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
349 // p2EntryStartOffset != -1 when we started p2 entry processing, but not completed
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
350 // if we handled last p1 entry but didn't start with p2 entry processing, it's -1 and regular p1 delta shall be used
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
351 s -= p2EntryStartOffset == -1 ? p1TotalAppliedDelta : p2EntryStartOffset;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
352 r.add(s, p2EntryEnd - p1TotalAppliedDelta, p2Data);
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
353 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
354 }
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
355 if (p1 < p1Max && insideP1entry) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
356 r.add(p1EntryStart, p1EntryEnd, p1Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
357 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
358 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
359 while (p1 < p1Max) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
360 r.add(this, p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
361 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
362 };
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
363 return r;
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
364 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
365 }