Mercurial > hg4j

annotate src/org/tmatesoft/hg/internal/Patch.java @ 606:5daa42067e7c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Avoid mmap files when only few bytes are to be read
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Tue, 07 May 2013 14:16:35 +0200
parents a52f4cc56f9c
children 7c0d2ce340b8
rev   line source
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
1 /*
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 532
diff changeset
2 * Copyright (c) 2011-2013 TMate Software Ltd
329
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 /**
419
7f136a3fa671 Clean javadoc to fix obvious warnings
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 330
diff changeset
24 * @see http://mercurial.selenic.com/wiki/BundleFormat
7f136a3fa671 Clean javadoc to fix obvious warnings
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 330
diff changeset
25 * in Changelog group description
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
26 *
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 532
diff changeset
27 * range [start..end) in original source gets replaced with data of length (do not keep, use data.length instead)
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 532
diff changeset
28 * range [end(i)..start(i+1)) is copied from the source
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
29 *
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
30 * @author Artem Tikhomirov
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
31 * @author TMate Software Ltd.
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
32 */
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
33 public final class Patch {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
34 private final IntVector starts, ends;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
35 private final ArrayList<byte[]> data;
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
36 private final boolean shallNormalize;
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
37
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
38 private static byte[] generate(int c) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
39 byte[] rv = new byte[c];
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
40 for (int i = 0; i < c; i++) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
41 byte x = (byte) ('a' + i);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
42 rv[i] = x;
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 return rv;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
45 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
46
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
47 public static void main(String[] args) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
48 Patch p1 = new Patch(), p2 = new Patch();
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
49 // simple cases (one element in either patch)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
50 // 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
51 // 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
52 // II: (1,1,10) & (3,11,15)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
53 // 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
54 // 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
55 // IV: (15, 25, 10) & (10, 30, 20)
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 insideP2
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 // cycle with insideP1
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
60 //
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
61 // multiple elements in patches (offsets)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
62 p1.add(15, 25, generate(10));
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
63 p2.add(10, 30, generate(20));
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
64 System.out.println("p1: " + p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
65 System.out.println("p2: " + p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
66 Patch r = p1.apply(p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
67 System.out.println("r: " + r);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
68 }
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
69
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
70 public Patch() {
587
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
71 this(16, false);
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
72 }
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
73
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
74 public Patch(boolean normalizeOnChange) {
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
75 this(16, normalizeOnChange);
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
76 }
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
77
587
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
78 public Patch(int sizeHint, boolean normalizeOnChange) {
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
79 shallNormalize = normalizeOnChange;
587
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
80 starts = new IntVector(sizeHint, -1);
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
81 ends = new IntVector(sizeHint, -1);
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
82 data = new ArrayList<byte[]>(sizeHint);
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
83 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
84
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
85 public String toString() {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
86 StringBuilder sb = new StringBuilder();
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
87 Formatter f = new Formatter(sb);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
88 for (int i = 0; i < count(); i++) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
89 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
90 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
91 return sb.toString();
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
92 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
93
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
94 public int count() {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
95 return data.size();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
96 }
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 // number of bytes this patch will add (or remove, if negative) from the base revision
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
99 public int patchSizeDelta() {
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
100 int rv = 0;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
101 int prevEnd = 0;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
102 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
103 final int start = starts.get(i);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
104 final int len = data.get(i).length;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
105 rv += start - prevEnd; // would copy from original
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
106 rv += len; // and add new
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
107 prevEnd = ends.get(i);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
108 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
109 rv -= prevEnd;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
110 return rv;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
111 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
112
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
113 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
114 if (outcomeLen == -1) {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
115 outcomeLen = baseRevisionContent.length() + patchSizeDelta();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
116 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
117 int prevEnd = 0, destIndex = 0;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
118 byte[] rv = new byte[outcomeLen];
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
119 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
120 final int start = starts.get(i);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
121 baseRevisionContent.seek(prevEnd);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
122 // 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
123 baseRevisionContent.readBytes(rv, destIndex, start - prevEnd);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
124 destIndex += start - prevEnd;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
125 // 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
126 byte[] d = data.get(i);
532
688c1ab113bb Introduce explicit reference to base patch in bundle's group element, use it when cloning to fix defect when few revisions list null,null parents
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 530
diff changeset
127 System.arraycopy(d, 0, rv, destIndex, d.length);
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
128 destIndex += d.length;
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
129 prevEnd = ends.get(i);
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 baseRevisionContent.seek(prevEnd);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
132 // copy everything in the source past last record's end
420
6c22bdc0bdfd Respect long offsets in revlogs
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 419
diff changeset
133 baseRevisionContent.readBytes(rv, destIndex, (baseRevisionContent.length() - prevEnd));
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
134 return rv;
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
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
137 public void clear() {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
138 starts.clear();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
139 ends.clear();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
140 data.clear();
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 * 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
145 * 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
146 */
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
147 public void read(DataAccess da) throws IOException {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
148 clear();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
149 while (!da.isEmpty()) {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
150 readOne(da);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
151 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
152 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
153
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
154 /**
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
155 * 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
156 */
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
157 public void readOne(DataAccess da) throws IOException {
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
158 int s = da.readInt();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
159 int e = da.readInt();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
160 int len = da.readInt();
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
161 byte[] src = new byte[len];
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
162 da.readBytes(src, 0, len);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
163 starts.add(s);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
164 ends.add(e);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
165 data.add(src);
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
166 }
534
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
167
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
168 /**
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
169 * @return how many bytes the patch would take if written down using BundleFormat structure (start, end, length, data)
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
170 */
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
171 public int serializedLength() {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
172 int totalDataLen = 0;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
173 for (byte[] d : data) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
174 totalDataLen += d.length;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
175 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
176 int prefix = 3 * 4 * count(); // 3 integer fields per entry * sizeof(int) * number of entries
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
177 return prefix + totalDataLen;
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
178 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
179
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
180 /*package-local*/ void serialize(DataSerializer out) throws IOException {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
181 for (int i = 0, x = data.size(); i < x; i++) {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
182 final int start = starts.get(i);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
183 final int end = ends.get(i);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
184 byte[] d = data.get(i);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
185 out.writeInt(start, end, d.length);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
186 out.write(d, 0, d.length);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
187 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
188 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
189
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
190 private void add(Patch p, int i) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
191 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
192 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
193
533
e6f72c9829a6 Generate patches using diff algorithm
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 532
diff changeset
194 /*package-local*/ void add(int start, int end, byte[] d) {
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
195 if (start == end && d.length == 0) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
196 System.currentTimeMillis();
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
197 return;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
198 }
584
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
199 int last;
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
200 if (shallNormalize && (last = starts.size()) > 0) {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
201 last--;
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
202 if (ends.get(last) == start) {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
203 byte[] d1 = data.get(last);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
204 byte[] nd;
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
205 if (d1.length > 0 && d.length > 0) {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
206 nd = new byte[d1.length + d.length];
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
207 System.arraycopy(d1, 0, nd, 0, d1.length);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
208 System.arraycopy(d, 0, nd, d1.length, d.length);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
209 } else {
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
210 nd = d1.length == 0 ? d : d1 ;
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
211 }
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
212 ends.set(last, end);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
213 data.set(last, nd);
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
214 return;
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
215 }
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
216 // fall-through
ed243b668502 Conditionally enable effective patch merge alternative for revlog reading
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 583
diff changeset
217 }
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
218 starts.add(start);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
219 ends.add(end);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
220 data.add(d);
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
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
223 // copies [start..end) bytes from the d
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
224 private static byte[] subarray(byte[] d, int start, int end) {
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
225 byte[] r = new byte[end-start];
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
226 System.arraycopy(d, start, r, 0, r.length);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
227 return r;
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
228 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
229
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
230 /**
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
231 * Modify this patch with subsequent patch
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
232 */
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
233 public /*SHALL BE PUBLIC ONCE TESTING ENDS*/ Patch apply(Patch another) {
587
a52f4cc56f9c Minimize vectors re-allocating when merging patches
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 584
diff changeset
234 Patch r = new Patch(count() + another.count() * 2, shallNormalize);
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
235 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
236 // 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
237 int p1EntryStart = 0, p1EntryEnd = 0, p1EntryLen = 0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
238 byte[] p1Data = null;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
239 boolean insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
240 int p2 = 0, p1 = 0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
241 final int p2Max = another.count(), p1Max = this.count();
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
242 L0: for (; p2 < p2Max; p2++) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
243 int p2EntryStart = another.starts.get(p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
244 int p2EntryEnd = another.ends.get(p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
245 final int p2EntryRange = p2EntryEnd - p2EntryStart;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
246 final byte[] p2Data = another.data.get(p2);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
247 boolean insideP2entry = false;
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
248 // when we iterate p1 elements within single p2, we need to remember where p2
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
249 // shall ultimately start in terms of p1
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
250 int p2EntrySavedStart = -1;
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
251 ///
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
252
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
253 L1: while (p1 < p1Max) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
254 if (!insideP1entry) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
255 p1EntryStart = starts.get(p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
256 p1EntryEnd = ends.get(p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
257 p1Data = data.get(p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
258 p1EntryLen = p1Data.length;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
259 }// else keep values
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
260
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
261 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
262 final int p1EntryAppliedStart = p1TotalAppliedDelta + p1EntryStart;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
263 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
264
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
265 if (insideP2entry) {
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
266 if (p2EntryEnd <= p1EntryAppliedStart) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
267 r.add(p2EntrySavedStart, p2EntryEnd - p1TotalAppliedDelta, p2Data);
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
268 insideP2entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
269 continue L0;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
270 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
271 if (p2EntryEnd >= p1EntryAppliedEnd) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
272 // 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
273 // 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
274 insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
275 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
276 p1TotalAppliedDelta += p1EntryDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
277 continue L1;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
278 }
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
279 // p1EntryAppliedStart < p2EntryEnd < p1EntryAppliedEnd
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
280 // can add up to p1EntryEnd here (not only to p1EntryStart), but decided
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
281 // to leave p1 intact here, to avoid delta/range recalculation
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
282 r.add(p2EntrySavedStart, p1EntryStart, p2Data);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
283 // consume part of p1 overlapped by current p2
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
284 final int p1DataPartShift = p2EntryEnd - p1EntryAppliedStart;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
285 // p2EntryEnd < p1EntryAppliedEnd ==> p2EntryEnd < p1EntryAppliedStart + p1EntryLen
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
286 // ==> p2EntryEnd - p1EntryAppliedStart < p1EntryLen
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
287 assert p1DataPartShift < p1EntryLen;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
288 p1EntryLen -= p1DataPartShift;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
289 p1Data = subarray(p1Data, p1DataPartShift, p1Data.length);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
290 p1TotalAppliedDelta += p1DataPartShift;
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
291 insideP1entry = true;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
292 insideP2entry = false;
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 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
295
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
296 if (p1EntryAppliedStart < p2EntryStart) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
297 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
298 // completely independent, copy and continue
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
299 r.add(p1EntryStart, p1EntryEnd, p1Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
300 insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
301 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
302 // fall-through to get p1TotalAppliedDelta incremented
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
303 } else { // SKETCH: II or III - p2 start inside p1 range
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
304 // remember, p1EntryDelta may be negative
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
305 // shall break j'th entry into few
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
306 // fix p1's end/length
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
307 // p1EntryAppliedStart < p2EntryStart < p1EntryAppliedEnd, or, alternatively
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
308 // p2EntryStart is from (p1EntryAppliedStart .. p1EntryAppliedStart + p1EntryLen)
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
309 int p1DataPartEnd = p2EntryStart - p1EntryAppliedStart;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
310 assert p1DataPartEnd < p1EntryLen;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
311 r.add(p1EntryStart, p1EntryEnd, subarray(p1Data, 0, p1DataPartEnd));
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
312 if (p2EntryEnd <= p1EntryAppliedEnd) { // p2 fits completely into p1
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
313 r.add(p1EntryEnd, p1EntryEnd, p2Data);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
314 // p2 consumed, p1 has p1EntryLen - p1DataPartEnd - p2EntryRange bytes left to *insert*
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
315 insideP1entry = true;
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
316 p1EntryStart = p1EntryEnd;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
317 p1EntryLen -= p1DataPartEnd;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
318 p1EntryLen -= p2EntryRange;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
319 // p2EntryEnd <= p1EntryAppliedEnd ==> p2EntryEnd <= p1EntryAppliedStart + p1EntryLen
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
320 // -p2EntryStart ==> p2EntryRange <= p1EntryAppliedStart-p2EntryStart + p1EntryLen
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
321 // p1EntryAppliedStart-p2EntryStart = -p1DataPartEnd ==> p2EntryRange <= p1EntryLen - p1DataEndPart
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
322 // +p1DataEndPart ==> p2EntryRange + p1DataEndPart <= p1EntryLen
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
323 assert p1EntryLen >= 0;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
324 // p1EntryLen==0 with insideP1entry == true is nor really good here (gives empty patch elements x;x;0),
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
325 // however changing <= to < in p2EntryEnd <= p1EntryAppliedEnd above leads to errors
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
326 p1Data = subarray(p1Data, p1DataPartEnd+p2EntryRange, p1Data.length);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
327 // augment total delta with p1EntryDelta part already consumed (p1EntryLen is pure insertion left for the next step)
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
328 p1TotalAppliedDelta += (p1EntryDelta - p1EntryLen);
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
329 continue L0;
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
330 } else {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
331 // p1 is consumed, take next
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
332 insideP1entry = false;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
333 p1++;
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
334 insideP2entry = true;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
335 p2EntrySavedStart = p1EntryEnd; // this is how far we've progressed in p1
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
336 // fall-through to get p1TotalAppliedDelta updated with consumed p1
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
337 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
338 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
339 } else { // p1EntryAppliedStart >= p2EntryStart
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
340 if (p2EntryEnd < p1EntryAppliedStart) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
341 // newer patch completely fits between two older patches
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
342 r.add(p2EntryStart - p1TotalAppliedDelta, p2EntryEnd - p1TotalAppliedDelta, p2Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
343 // 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
344 continue L0; // next p2
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
345 } else { // p2EntryEnd >= p1EntryAppliedStart
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
346 // SKETCH: I or IV:
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
347 // p2 start is outside of p1 range.
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
348 //
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
349 // p2DataPartEnd: this is how many bytes prior to p1EntryStart is replaced by p2Data
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
350 int p2DataPartEnd = p1EntryAppliedStart - p2EntryStart;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
351 if (p2EntryEnd < p1EntryAppliedEnd) {
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
352 // 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
353 insideP1entry = true;
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
354 // replace whole p1 (extended to the left by (p2 \ p1) front bytes)
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
355 r.add(p1EntryStart - p2DataPartEnd, p1EntryEnd, p2Data);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
356 p1EntryStart = p1EntryEnd;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
357 // see how much of p1 is left for insertion
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
358 int p1DataPartEnd = p2EntryEnd - p1EntryAppliedStart; // #1
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
359 // Similar, although incorrect: p1DataPartEnd == p2Data.length - p2DataPartEnd; // #2
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
360 // #1(p2EntryStart + p2DataLen) - p1EntryAppliedStart
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
361 // #2 p2DataLen - (p1EntryAppliedStart - p2EntryStart)
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
362 // but this works only in assumption that p2EntryEnd-p2EntryStart == p2Data.length
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
363 //
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
364 // p1EntryAppliedStart <= p2EntryEnd < p1EntryAppliedStart + p1EntryLen
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
365 // -p1EntryAppliedStart (to compare against p1DataPartEnd) ==> 0 <= p1DataPartEnd < p1EntryLen
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
366 assert p1DataPartEnd < p1EntryLen;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
367 assert p1DataPartEnd >= 0;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
368 p1EntryLen -= p1DataPartEnd;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
369 p1Data = subarray(p1Data, p1DataPartEnd, p1Data.length);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
370
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
371 // p1TotalAppliedDelta XXX
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
372 p1TotalAppliedDelta += (p1EntryDelta - p1EntryLen);
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
373 continue L0; // next p2;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
374 } else {
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
375 // p2EntryEnd >= p1EntryAppliedEnd
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
376 // 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
377 insideP1entry = false;
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
378 // p1 consumed
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
379 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
380 insideP2entry = true;
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
381 // extend to the left of p1 by p2 \ p1 front bytes
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
382 p2EntrySavedStart = p1EntryStart - p2DataPartEnd;
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
383 // fall-through to get p1TotalAppliedDelta incremented
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
384 }
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
385 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
386 }
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
387 p1TotalAppliedDelta += p1EntryDelta;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
388 } // while (p1 < p1Max)
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
389 {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
390 // 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
391 // regardless of whether insideP2 is .t
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
392 int s = p2EntrySavedStart != -1 ? p2EntrySavedStart : p2EntryStart - p1TotalAppliedDelta;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
393 // p2EntrySavedStart != -1 when we started p2 entry processing, but not completed
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
394 // 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
395 r.add(s, p2EntryEnd - p1TotalAppliedDelta, p2Data);
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
396 }
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
397 }
330
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
398 if (p1 < p1Max && insideP1entry) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
399 r.add(p1EntryStart, p1EntryEnd, p1Data);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
400 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
401 }
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
402 while (p1 < p1Max) {
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
403 r.add(this, p1);
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
404 p1++;
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
405 };
9747a786a34d Patch merging algorithm complete trial
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 329
diff changeset
406 return r;
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
407 }
534
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
408
583
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
409 /**
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
410 * Combine consecutive regions into one.
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
411 * XXX NOW only combines two subsequent regions, seems enough for quick test
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
412 * @return <code>this</code> or new instance of consecutive regions found
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
413 */
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
414 public Patch normalize() {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
415 Patch rv = null;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
416 for (int i = 1, x = data.size(); i < x; i++) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
417 if (starts.get(i) == ends.get(i-1)) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
418 if (rv == null) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
419 rv = new Patch();
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
420 rv.copyOf(this, 0, i-1);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
421 // } else if (ends.get(i-1) == rv.ends.get(rv.ends.size()-1)) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
422 // // "JUST IN CASE" code, i++ below prevents us from getting here
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
423 // // if the last region is the one already merged,
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
424 // // ignore this occurrence (otherwise data(i-1) would get copied again)
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
425 // continue;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
426 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
427 byte[] d1 = data.get(i-1);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
428 byte[] d = data.get(i);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
429 byte[] nd;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
430 if (d1.length > 0 && d.length > 0) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
431 nd = new byte[d1.length + d.length];
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
432 System.arraycopy(d1, 0, nd, 0, d1.length);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
433 System.arraycopy(d, 0, nd, d1.length, d.length);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
434 } else {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
435 nd = d1.length == 0 ? d : d1 ;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
436 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
437 rv.add(starts.get(i-1), ends.get(i), nd);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
438 i++; // skip i-th element (effectively means we detect only pairs)
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
439 // without this ++, element(i-1) is added to rv once "else" below is hit on the next step
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
440 } else {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
441 if (rv != null) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
442 rv.add(this, i-1);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
443 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
444 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
445 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
446 if (rv == null) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
447 return this;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
448 } else {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
449 int last = count() - 1;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
450 if (starts.get(last) != ends.get(last-1)) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
451 rv.add(this, last);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
452 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
453 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
454 return rv;
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
455 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
456
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
457 private void copyOf(Patch another, int fromIndex, int upToIndex) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
458 while(fromIndex < upToIndex) {
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
459 add(another, fromIndex++);
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
460 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
461 }
47dfa0ec7e35 Effective revlog patching
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 534
diff changeset
462
534
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
463 public class PatchDataSource implements DataSerializer.DataSource {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
464
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
465 public void serialize(DataSerializer out) throws IOException {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
466 Patch.this.serialize(out);
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
467 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
468
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
469 public int serializeLength() {
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
470 return Patch.this.serializedLength();
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
471 }
243202f1bda5 Commit: refactor revision creation code from clone command to work separately, fit into existing library structure
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents: 533
diff changeset
472 }
329
694ebabb5cb3 Refactor revlog patch mechanism, towards patch merging
Artem Tikhomirov <tikhomirov.artem@gmail.com>
parents:
diff changeset
473 }