--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/com/tmate/hgkit/ll/Changeset.java	Fri Dec 17 19:05:59 2010 +0100
@@ -0,0 +1,99 @@
+/**
+ * Copyright (c) 2010 Artem Tikhomirov 
+ */
+package com.tmate.hgkit.ll;
+
+import java.io.UnsupportedEncodingException;
+import java.util.ArrayList;
+
+/**
+ * @see mercurial/changelog.py:read()
+ * <pre>
+        format used:
+        nodeid\n        : manifest node in ascii
+        user\n          : user, no \n or \r allowed
+        time tz extra\n : date (time is int or float, timezone is int)
+                        : extra is metadatas, encoded and separated by '\0'
+                        : older versions ignore it
+        files\n\n       : files modified by the cset, no \n or \r allowed
+        (.*)            : comment (free text, ideally utf-8)
+
+        changelog v0 doesn't use extra
+ * </pre>
+ * @author artem
+ */
+public class Changeset {
+	private /*final*/ Nodeid nodeid;
+	private String user;
+	private String comment;
+	private ArrayList<String> files;
+	private String timezone; // FIXME
+	public byte[] rawData; // FIXME
+	
+	public void dump() {
+		System.out.println("User:" + user);
+		System.out.println("Comment:" + comment);
+		System.out.println("Nodeid:" + nodeid);
+		System.out.println("Date:" + timezone);
+		System.out.println("Files: " + files.size());
+		for (String s : files) {
+			System.out.print('\t');
+			System.out.println(s);
+		}
+	}
+
+	public void read(byte[] buf, int offset, int length) {
+		rawData = new byte[length];
+		System.arraycopy(buf, offset, rawData, 0, length);
+		final int bufferEndIndex = offset + length;
+		final byte lineBreak = (byte) '\n';
+		int breakIndex1 = indexOf(buf, lineBreak, offset, bufferEndIndex);
+		if (breakIndex1 == -1) {
+			throw new IllegalArgumentException("Bad Changeset data");
+		}
+		nodeid = Nodeid.fromAscii(buf, 0, breakIndex1);
+		int breakIndex2 = indexOf(buf, lineBreak, breakIndex1+1, bufferEndIndex);
+		if (breakIndex2 == -1) {
+			throw new IllegalArgumentException("Bad Changeset data");
+		}
+		user = new String(buf, breakIndex1+1, breakIndex2 - breakIndex1 - 1);
+		int breakIndex3 = indexOf(buf, lineBreak, breakIndex2+1, bufferEndIndex);
+		if (breakIndex3 == -1) {
+			throw new IllegalArgumentException("Bad Changeset data");
+		}
+		timezone = new String(buf, breakIndex2+1, breakIndex3 - breakIndex2 - 1);
+		
+		//
+		int lastStart = breakIndex3 + 1;
+		int breakIndex4 = indexOf(buf, lineBreak, lastStart, bufferEndIndex);
+		files = new ArrayList<String>(5);
+		while (breakIndex4 != -1 && breakIndex4 + 1 < bufferEndIndex) {
+			files.add(new String(buf, lastStart, breakIndex4 - lastStart));
+			lastStart = breakIndex4 + 1;
+			if (buf[breakIndex4 + 1] == lineBreak) {
+				// found \n\n
+				break;
+			} else {
+				breakIndex4 = indexOf(buf, lineBreak, lastStart, bufferEndIndex);
+			}
+		}
+		if (breakIndex4 == -1 || breakIndex4 >= bufferEndIndex) {
+			throw new IllegalArgumentException("Bad Changeset data");
+		}
+		try {
+			comment = new String(buf, breakIndex4+2, bufferEndIndex - breakIndex4 - 2, "UTF-8");
+		} catch (UnsupportedEncodingException ex) {
+			comment = "";
+			throw new IllegalStateException("Could hardly happen");
+		}
+	}
+
+	private static int indexOf(byte[] src, byte what, int startOffset, int endIndex) {
+		for (int i = startOffset; i < endIndex; i++) {
+			if (src[i] == what) {
+				return i;
+			}
+		}
+		return -1;
+	}
+}