Allow writing a NoteMap back to the repository

This is necessary to allow applications to wrap the note tree in
a commit and update the note branch with the new state.

Change-Id: Idbd7ead4a1b16ae2b64a30a4a01a29cfed548cdf
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

1 files changed, 29 insertions, 0 deletions

diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/notes/NonNoteEntry.java b/org.eclipse.jgit/src/org/eclipse/jgit/notes/NonNoteEntry.java
index 20fd3a88ad..6a2d44bca9 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/notes/NonNoteEntry.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/notes/NonNoteEntry.java
@@ -68,4 +68,33 @@ class NonNoteEntry extends ObjectId {
 	void format(TreeFormatter fmt) {
 		fmt.append(name, mode, this);
 	}
+
+	int treeEntrySize() {
+		return TreeFormatter.entrySize(mode, name.length);
+	}
+
+	int pathCompare(byte[] bBuf, int bPos, int bLen, FileMode bMode) {
+		return pathCompare(name, 0, name.length, mode, //
+				bBuf, bPos, bLen, bMode);
+	}
+
+	private static int pathCompare(final byte[] aBuf, int aPos, final int aEnd,
+			final FileMode aMode, final byte[] bBuf, int bPos, final int bEnd,
+			final FileMode bMode) {
+		while (aPos < aEnd && bPos < bEnd) {
+			int cmp = (aBuf[aPos++] & 0xff) - (bBuf[bPos++] & 0xff);
+			if (cmp != 0)
+				return cmp;
+		}
+
+		if (aPos < aEnd)
+			return (aBuf[aPos] & 0xff) - lastPathChar(bMode);
+		if (bPos < bEnd)
+			return lastPathChar(aMode) - (bBuf[bPos] & 0xff);
+		return 0;
+	}
+
+	private static int lastPathChar(final FileMode mode) {
+		return FileMode.TREE.equals(mode.getBits()) ? '/' : '\0';
+	}
 }