commit c5e987095ca1ece8a57a9472b289f370b2ece5d5
author Andreas Wundsam <andreas.wundsam@bigswitch.com> Mon May 05 13:12:19 2014 -0700
committer Andreas Wundsam <andreas.wundsam@bigswitch.com> Mon May 05 13:12:19 2014 -0700
tree 2d37823d0a3041d55d2f5232808bbbe35c7574df
parent 3421f7d2d42244e9f77f86b11c0a450051d2db70

java_gen.HashValueUtils - prefixBit - remove useless hash value, add unit test

Also fix numBits==0 corner case bug discovered by unit test

java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/HashValueUtils.java

diff --git a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/HashValueUtils.java b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/HashValueUtils.java
index 6780035..15f8a9b 100644
--- a/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/HashValueUtils.java
+++ b/java_gen/pre-written/src/main/java/org/projectfloodlight/openflow/types/HashValueUtils.java
@@ -14,4 +14,16 @@
         return key ^ (value & valueMask);
     }
 
+    public static int prefixBits(long raw1, int numBits) {
+        Preconditions.checkArgument(numBits >= 0 && numBits <= 32,
+                "numBits must be in range [0, 32]");
+
+        if(numBits == 0)
+            return 0;
+
+        final int shiftDown = 64 - numBits;
+
+        return (int) (raw1 >>> shiftDown);
+    }
+
 }