--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/security/krb5/internal/util/KrbDataInputStream.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,84 @@
+/*
+ * Portions Copyright 2000-2005 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ *
+ *  (C) Copyright IBM Corp. 1999 All Rights Reserved.
+ *  Copyright 1997 The Open Group Research Institute.  All rights reserved.
+ */
+
+package sun.security.krb5.internal.util;
+
+import java.io.BufferedInputStream;
+import java.io.InputStream;
+import java.io.IOException;
+
+/**
+ * This class implements a buffered input stream. It provides methods to read a chunck
+ * of data from underlying data stream.
+ *
+ * @author Yanni Zhang
+ *
+ */
+public class KrbDataInputStream extends BufferedInputStream{
+    private boolean bigEndian = true;
+
+    public void setNativeByteOrder() {
+        if (java.nio.ByteOrder.nativeOrder().
+                equals(java.nio.ByteOrder.BIG_ENDIAN)) {
+            bigEndian = true;
+        } else {
+            bigEndian = false;
+        }
+    }
+    public KrbDataInputStream(InputStream is){
+        super(is);
+    }
+    /**
+     * Reads up to the specific number of bytes from this input stream.
+     * @param num the number of bytes to be read.
+     * @return the int value of this byte array.
+     * @exception IOException.
+     */
+    public int read(int num) throws IOException{
+        byte[] bytes = new byte[num];
+        read(bytes, 0, num);
+        int result = 0;
+        for (int i = 0; i < num; i++) {
+            if (bigEndian) {
+                result |= (bytes[i] & 0xff) << (num - i - 1) * 8;
+            } else {
+                result |= (bytes[i] & 0xff) << i * 8;
+            }
+        }
+        return result;
+    }
+
+    public int readVersion() throws IOException {
+        // always read in big-endian mode
+        int result = (read() & 0xff) << 8;
+        return result | (read() & 0xff);
+    }
+}