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comparison src/com/tmate/hgkit/ll/HgDataFile.java @ 17:571e1b2cc3f7

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Query file for its parents. Demo of recently added ignore and digest support from within cat cmd
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Mon, 27 Dec 2010 01:43:08 +0100
parents fc265ddeab26
children e929cecae4e1
comparison
equal deleted inserted replaced
16:254078595653 17:571e1b2cc3f7
1 /** 1 /*
2 * Copyright (c) 2010 Artem Tikhomirov 2 * Copyright (c) 2010 Artem Tikhomirov
3 */ 3 */
4 package com.tmate.hgkit.ll; 4 package com.tmate.hgkit.ll;
5 5
6 import static com.tmate.hgkit.ll.HgRepository.TIP; 6 import static com.tmate.hgkit.ll.HgRepository.TIP;
7
8 import java.util.Arrays;
7 9
8 /** 10 /**
9 * Extends Revlog/uses RevlogStream? 11 * Extends Revlog/uses RevlogStream?
10 * ? name:HgFileNode? 12 * ? name:HgFileNode?
11 * @author artem 13 * @author artem
69 } 71 }
70 72
71 public void history(int start, int end, Changeset.Inspector i) { 73 public void history(int start, int end, Changeset.Inspector i) {
72 throw HgRepository.notImplemented(); 74 throw HgRepository.notImplemented();
73 } 75 }
76
77 /**
78 * XXX perhaps, return value Nodeid[2] and boolean needNodeids is better (and higher level) API for this query?
79 *
80 * @param revision - revision to query parents, or {@link HgRepository#TIP}
81 * @param parentRevisions - int[2] to get local revision numbers of parents (e.g. {6, -1})
82 * @param parent1 - byte[20] or null, if parent's nodeid is not needed
83 * @param parent2 - byte[20] or null, if second parent's nodeid is not needed
84 * @return
85 */
86 public void parents(int revision, int[] parentRevisions, byte[] parent1, byte[] parent2) {
87 if (revision != TIP && !(revision >= 0 && revision < content.revisionCount())) {
88 throw new IllegalArgumentException(String.valueOf(revision));
89 }
90 if (parentRevisions == null || parentRevisions.length < 2) {
91 throw new IllegalArgumentException(String.valueOf(parentRevisions));
92 }
93 if (parent1 != null && parent1.length < 20) {
94 throw new IllegalArgumentException(parent1.toString());
95 }
96 if (parent2 != null && parent2.length < 20) {
97 throw new IllegalArgumentException(parent2.toString());
98 }
99 class ParentCollector implements Revlog.Inspector {
100 public int p1 = -1;
101 public int p2 = -1;
102 public byte[] nodeid;
103
104 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, byte[] data) {
105 p1 = parent1Revision;
106 p2 = parent2Revision;
107 this.nodeid = new byte[20];
108 // nodeid arg now comes in 32 byte from (as in file format description), however upper 12 bytes are zeros.
109 System.arraycopy(nodeid, nodeid.length > 20 ? nodeid.length - 20 : 0, this.nodeid, 0, 20);
110 }
111 };
112 ParentCollector pc = new ParentCollector();
113 content.iterate(revision, revision, false, pc);
114 parentRevisions[0] = pc.p1;
115 parentRevisions[1] = pc.p2;
116 if (parent1 != null) {
117 if (parentRevisions[0] == -1) {
118 Arrays.fill(parent1, 0, 20, (byte) 0);
119 } else {
120 content.iterate(parentRevisions[0], parentRevisions[0], false, pc);
121 System.arraycopy(pc.nodeid, 0, parent1, 0, 20);
122 }
123 }
124 if (parent2 != null) {
125 if (parentRevisions[1] == -1) {
126 Arrays.fill(parent2, 0, 20, (byte) 0);
127 } else {
128 content.iterate(parentRevisions[1], parentRevisions[1], false, pc);
129 System.arraycopy(pc.nodeid, 0, parent2, 0, 20);
130 }
131 }
132 }
74 } 133 }