1 files changed, 12 insertions, 1 deletions
diff --git a/java/common/src/main/java/org/apache/qpid/transport/util/Functions.java b/java/common/src/main/java/org/apache/qpid/transport/util/Functions.java
index 2c6984e302..9f1c0ca9eb 100644
--- a/java/common/src/main/java/org/apache/qpid/transport/util/Functions.java
+++ b/java/common/src/main/java/org/apache/qpid/transport/util/Functions.java
@@ -34,6 +34,12 @@ import static java.lang.Math.*;
 public class Functions
 {
 
+    public static final int mod(int n, int m)
+    {
+        int r = n % m;
+        return r < 0 ? m + r : r;
+    }
+
     public static final byte lsb(int i)
     {
         return (byte) (0xFF & i);
@@ -51,12 +57,17 @@ public class Functions
 
     public static final String str(ByteBuffer buf, int limit)
     {
+    	return str(buf, limit,buf.position());
+    }
+    
+    public static final String str(ByteBuffer buf, int limit,int start)
+    {
         StringBuilder str = new StringBuilder();
         str.append('"');
 
         for (int i = 0; i < min(buf.remaining(), limit); i++)
         {
-            byte c = buf.get(buf.position() + i);
+            byte c = buf.get(start + i);
 
             if (c > 31 && c < 127 && c != '\\')
             {