From a502d96a860456ec5e8c96761db70f7cabb74751 Mon Sep 17 00:00:00 2001
From: Paul Martin <paul@paulsputer.com>
Date: Sat, 30 Apr 2016 04:19:14 -0400
Subject: [PATCH] Merge pull request #1073 from gitblit/1062-DocEditorUpdates

---
 src/main/java/com/gitblit/utils/ResettableByteArrayOutputStream.java |   42 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 42 insertions(+), 0 deletions(-)

diff --git a/src/main/java/com/gitblit/utils/ResettableByteArrayOutputStream.java b/src/main/java/com/gitblit/utils/ResettableByteArrayOutputStream.java
new file mode 100644
index 0000000..7df0693
--- /dev/null
+++ b/src/main/java/com/gitblit/utils/ResettableByteArrayOutputStream.java
@@ -0,0 +1,42 @@
+// Copyright (C) 2014 Tom <tw201207@gmail.com>
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package com.gitblit.utils;
+
+import java.io.ByteArrayOutputStream;
+
+/**
+ * A {@link ByteArrayOutputStream} that can be reset to a specified position.
+ *
+ * @author Tom <tw201207@gmail.com>
+ */
+public class ResettableByteArrayOutputStream extends ByteArrayOutputStream {
+
+	/**
+	 * Reset the stream to the given position. If {@code mark} is <= 0, see {@link #reset()}.
+	 * A no-op if the stream contains less than {@code mark} bytes. Otherwise, resets the
+	 * current writing position to {@code mark}. Previously allocated buffer space will be
+	 * reused in subsequent writes.
+	 *
+	 * @param mark
+	 *            to set the current writing position to.
+	 */
+	public synchronized void resetTo(int mark) {
+		if (mark <= 0) {
+			reset();
+		} else if (mark < count) {
+			count = mark;
+		}
+	}
+
+}

--
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