1 files changed, 27 insertions, 0 deletions
diff --git a/vespajlib/src/main/java/com/yahoo/io/HexDump.java b/vespajlib/src/main/java/com/yahoo/io/HexDump.java
new file mode 100644
index 00000000000..65a6f8d2b5a
--- /dev/null
+++ b/vespajlib/src/main/java/com/yahoo/io/HexDump.java
@@ -0,0 +1,27 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.io;
+
+/**
+ * @author bratseth
+ */
+public class HexDump {
+
+    private static final String HEX_CHARS = "0123456789ABCDEF";
+
+    public static String toHexString(byte[] buf) {
+        if (buf == null) {
+            return null;
+        }
+        StringBuilder sb = new StringBuilder();
+        for (byte b : buf) {
+            int x = b;
+            if (x < 0) {
+                x += 256;
+            }
+            sb.append(HEX_CHARS.charAt(x / 16));
+            sb.append(HEX_CHARS.charAt(x % 16));
+        }
+        return sb.toString();
+    }
+
+}