Moving to root below branch label

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2005 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/filesys/smb/dcerpc/DCEDataPacker.java

@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * 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 org.alfresco.filesys.smb.dcerpc;
+
+import org.alfresco.filesys.util.DataPacker;
+
+/**
+ * DCE Data Packer Class
+ */
+public class DCEDataPacker
+{
+
+    /**
+     * Unpack a DCE string from the buffer
+     * 
+     * @param buf byte[]
+     * @param off int
+     * @return String
+     * @exception java.lang.IndexOutOfBoundsException If there is not enough data in the buffer.
+     */
+    public final static String getDCEString(byte[] buf, int off) throws IndexOutOfBoundsException
+    {
+
+        // Check if the buffer is big enough to hold the String header
+
+        if (buf.length < off + 12)
+            throw new IndexOutOfBoundsException();
+
+        // Get the maximum and actual string length
+
+        int maxLen = DataPacker.getIntelInt(buf, off);
+        int strLen = DataPacker.getIntelInt(buf, off + 8);
+
+        // Read the Unicode string
+
+        return DataPacker.getUnicodeString(buf, off + 12, strLen);
+    }
+
+    /**
+     * Pack a DCE string into the buffer
+     * 
+     * @param buf byte[]
+     * @param off int
+     * @param str String
+     * @param incNul boolean
+     * @return int
+     */
+    public final static int putDCEString(byte[] buf, int off, String str, boolean incNul)
+    {
+
+        // Pack the string header
+
+        DataPacker.putIntelInt(str.length() + 1, buf, off);
+        DataPacker.putZeros(buf, off + 4, 4);
+
+        if (incNul == false)
+            DataPacker.putIntelInt(str.length(), buf, off + 8);
+        else
+            DataPacker.putIntelInt(str.length() + 1, buf, off + 8);
+
+        // Pack the string
+
+        return DataPacker.putUnicodeString(str, buf, off + 12, incNul);
+    }
+
+    /**
+     * Align a buffer offset on a longword boundary
+     * 
+     * @param pos int
+     * @return int
+     */
+    public final static int wordAlign(int pos)
+    {
+        return (pos + 1) & 0xFFFFFFFE;
+    }
+
+    /**
+     * Align a buffer offset on a longword boundary
+     * 
+     * @param pos int
+     * @return int
+     */
+    public final static int longwordAlign(int pos)
+    {
+        return (pos + 3) & 0xFFFFFFFC;
+    }
+}