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annotate src/org/tmatesoft/hg/repo/HgManifest.java @ 158:b413b16d10a5

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Integer offsets and file length explictly, rather than casts throughout code. Inflater may benefit from total length hint, but shall calculate it by its own if needed
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Wed, 09 Mar 2011 13:16:37 +0100
parents d5268ca7715b
children e2115da4cf6a
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1 /*
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2 * Copyright (c) 2010-2011 TMate Software Ltd
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3 *
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4 * This program is free software; you can redistribute it and/or modify
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5 * it under the terms of the GNU General Public License as published by
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6 * the Free Software Foundation; version 2 of the License.
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7 *
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8 * This program is distributed in the hope that it will be useful,
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9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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11 * GNU General Public License for more details.
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12 *
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13 * For information on how to redistribute this software under
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14 * the terms of a license other than GNU General Public License
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15 * contact TMate Software at support@hg4j.com
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16 */
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17 package org.tmatesoft.hg.repo;
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19 import java.io.IOException;
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21 import org.tmatesoft.hg.core.HgBadStateException;
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22 import org.tmatesoft.hg.core.Nodeid;
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23 import org.tmatesoft.hg.internal.DataAccess;
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24 import org.tmatesoft.hg.internal.RevlogStream;
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27 /**
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28 *
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29 * @author Artem Tikhomirov
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30 * @author TMate Software Ltd.
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31 */
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32 public class HgManifest extends Revlog {
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33
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34 /*package-local*/ HgManifest(HgRepository hgRepo, RevlogStream content) {
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35 super(hgRepo, content);
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36 }
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37
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38 public void walk(int start, int end, final Inspector inspector) {
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39 RevlogStream.Inspector insp = new RevlogStream.Inspector() {
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41 private boolean gtg = true; // good to go
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42
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43 public void next(int revisionNumber, int actualLen, int baseRevision, int linkRevision, int parent1Revision, int parent2Revision, byte[] nodeid, DataAccess da) {
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44 if (!gtg) {
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45 return;
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46 }
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47 try {
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48 gtg = gtg && inspector.begin(revisionNumber, new Nodeid(nodeid, true));
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49 int i;
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50 String fname = null;
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51 String flags = null;
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52 Nodeid nid = null;
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53 byte[] data = da.byteArray();
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54 for (i = 0; gtg && i < actualLen; i++) {
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55 int x = i;
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56 for( ; data[i] != '\n' && i < actualLen; i++) {
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57 if (fname == null && data[i] == 0) {
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58 fname = new String(data, x, i - x);
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59 x = i+1;
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60 }
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61 }
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62 if (i < actualLen) {
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63 assert data[i] == '\n';
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64 int nodeidLen = i - x < 40 ? i-x : 40;
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65 nid = Nodeid.fromAscii(data, x, nodeidLen);
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66 if (nodeidLen + x < i) {
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67 // 'x' and 'l' for executable bits and symlinks?
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68 // hg --debug manifest shows 644 for each regular file in my repo
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69 flags = new String(data, x + nodeidLen, i-x-nodeidLen);
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70 }
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71 gtg = gtg && inspector.next(nid, fname, flags);
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72 }
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73 nid = null;
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74 fname = flags = null;
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75 }
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76 gtg = gtg && inspector.end(revisionNumber);
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77 } catch (IOException ex) {
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78 throw new HgBadStateException(ex);
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79 }
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80 }
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81 };
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82 content.iterate(start, end, true, insp);
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83 }
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84
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85 public interface Inspector {
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86 boolean begin(int revision, Nodeid nid);
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87 boolean next(Nodeid nid, String fname, String flags);
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88 boolean end(int revision);
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89 }
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90 }