Updated RTA hashes to 32-bit values.

... and reworked the hashes a bit. Also added mem_hash function
which just computes a hash of given memory block.

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/hash.h b/lib/hash.h
index a73f647a..f4a953a3 100644
--- a/lib/hash.h
+++ b/lib/hash.h
@@ -178,3 +178,15 @@
 
 #define HASH_WALK_FILTER_END } while (0)
 
+static inline uint
+mem_hash(void *p, int s)
+{
+  const char *pp = p;
+  const u64 multiplier = 0xb38bc09a61202731ULL;
+  u64 value = 0x001047d54778bcafULL;
+  for (int i=0;i<s;i++)
+    value = value*multiplier + pp[i];
+
+  return ((value >> 32) ^ (value & 0xffffffff));
+}
+