tikhomirov@0: /** tikhomirov@0: * Copyright (c) 2010 Artem Tikhomirov tikhomirov@0: */ tikhomirov@0: package com.tmate.hgkit.ll; tikhomirov@0: tikhomirov@0: import java.io.UnsupportedEncodingException; tikhomirov@0: import java.util.ArrayList; tikhomirov@0: tikhomirov@0: /** tikhomirov@0: * @see mercurial/changelog.py:read() tikhomirov@0: *
tikhomirov@0:         format used:
tikhomirov@0:         nodeid\n        : manifest node in ascii
tikhomirov@0:         user\n          : user, no \n or \r allowed
tikhomirov@0:         time tz extra\n : date (time is int or float, timezone is int)
tikhomirov@0:                         : extra is metadatas, encoded and separated by '\0'
tikhomirov@0:                         : older versions ignore it
tikhomirov@0:         files\n\n       : files modified by the cset, no \n or \r allowed
tikhomirov@0:         (.*)            : comment (free text, ideally utf-8)
tikhomirov@0: 
tikhomirov@0:         changelog v0 doesn't use extra
tikhomirov@0:  * 
tikhomirov@0: * @author artem tikhomirov@0: */ tikhomirov@0: public class Changeset { tikhomirov@3: // TODO immutable tikhomirov@0: private /*final*/ Nodeid nodeid; tikhomirov@0: private String user; tikhomirov@0: private String comment; tikhomirov@0: private ArrayList files; tikhomirov@0: private String timezone; // FIXME tikhomirov@0: tikhomirov@0: public void dump() { tikhomirov@0: System.out.println("User:" + user); tikhomirov@0: System.out.println("Comment:" + comment); tikhomirov@0: System.out.println("Nodeid:" + nodeid); tikhomirov@0: System.out.println("Date:" + timezone); tikhomirov@0: System.out.println("Files: " + files.size()); tikhomirov@0: for (String s : files) { tikhomirov@0: System.out.print('\t'); tikhomirov@0: System.out.println(s); tikhomirov@0: } tikhomirov@0: } tikhomirov@0: tikhomirov@3: public static Changeset parse(byte[] data, int offset, int length) { tikhomirov@3: Changeset rv = new Changeset(); tikhomirov@5: rv.init(data, offset, length); tikhomirov@5: return rv; tikhomirov@5: } tikhomirov@5: tikhomirov@5: /*package-local*/ void init(byte[] data, int offset, int length) { tikhomirov@0: final int bufferEndIndex = offset + length; tikhomirov@0: final byte lineBreak = (byte) '\n'; tikhomirov@3: int breakIndex1 = indexOf(data, lineBreak, offset, bufferEndIndex); tikhomirov@0: if (breakIndex1 == -1) { tikhomirov@0: throw new IllegalArgumentException("Bad Changeset data"); tikhomirov@0: } tikhomirov@5: Nodeid _nodeid = Nodeid.fromAscii(data, 0, breakIndex1); tikhomirov@3: int breakIndex2 = indexOf(data, lineBreak, breakIndex1+1, bufferEndIndex); tikhomirov@0: if (breakIndex2 == -1) { tikhomirov@0: throw new IllegalArgumentException("Bad Changeset data"); tikhomirov@0: } tikhomirov@5: String _user = new String(data, breakIndex1+1, breakIndex2 - breakIndex1 - 1); tikhomirov@3: int breakIndex3 = indexOf(data, lineBreak, breakIndex2+1, bufferEndIndex); tikhomirov@0: if (breakIndex3 == -1) { tikhomirov@0: throw new IllegalArgumentException("Bad Changeset data"); tikhomirov@0: } tikhomirov@5: String _timezone = new String(data, breakIndex2+1, breakIndex3 - breakIndex2 - 1); tikhomirov@0: tikhomirov@0: // tikhomirov@0: int lastStart = breakIndex3 + 1; tikhomirov@3: int breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); tikhomirov@5: ArrayList _files = new ArrayList(5); tikhomirov@0: while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) { tikhomirov@5: _files.add(new String(data, lastStart, breakIndex4 - lastStart)); tikhomirov@0: lastStart = breakIndex4 + 1; tikhomirov@3: if (data[breakIndex4 + 1] == lineBreak) { tikhomirov@0: // found \n\n tikhomirov@0: break; tikhomirov@0: } else { tikhomirov@3: breakIndex4 = indexOf(data, lineBreak, lastStart, bufferEndIndex); tikhomirov@0: } tikhomirov@0: } tikhomirov@0: if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) { tikhomirov@0: throw new IllegalArgumentException("Bad Changeset data"); tikhomirov@0: } tikhomirov@5: String _comment; tikhomirov@0: try { tikhomirov@5: _comment = new String(data, breakIndex4+2, bufferEndIndex - breakIndex4 - 2, "UTF-8"); tikhomirov@0: } catch (UnsupportedEncodingException ex) { tikhomirov@5: _comment = ""; tikhomirov@0: throw new IllegalStateException("Could hardly happen"); tikhomirov@0: } tikhomirov@5: // change this instance at once, don't leave it partially changes in case of error tikhomirov@5: this.nodeid = _nodeid; tikhomirov@5: this.user = _user; tikhomirov@5: this.timezone = _timezone; tikhomirov@5: this.files = _files; tikhomirov@5: this.comment = _comment; tikhomirov@0: } tikhomirov@0: tikhomirov@0: private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) { tikhomirov@0: for (int i = startOffset; i < endIndex; i++) { tikhomirov@0: if (src[i] == what) { tikhomirov@0: return i; tikhomirov@0: } tikhomirov@0: } tikhomirov@0: return -1; tikhomirov@0: } tikhomirov@2: tikhomirov@3: public interface Inspector { tikhomirov@2: // first(), last(), single(). tikhomirov@2: // tikhomirov@2: void next(Changeset cset); tikhomirov@2: } tikhomirov@0: }