--- libaitcrc/src/hash.c	2012/07/04 14:53:43	1.3
+++ libaitcrc/src/hash.c	2012/08/29 09:00:44	1.4
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: hash.c,v 1.3 2012/07/04 14:53:43 misho Exp $
+* $Id: hash.c,v 1.4 2012/08/29 09:00:44 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -181,4 +181,45 @@ hash_reddragon(const char *csStr, int nStrLen)
 	}
 
 	return hash;
+}
+
+/*
+ * hash_jenkins32() - Fast Jenkins hash function
+ *
+ * @buf = Input buffer
+ * @len = Length of buffer
+ * @prevhash = Previous hash, if participate in continuing hash
+ * return: Hash value
+ */
+u_int
+hash_jenkins32(const u_int *buf, int len, u_int prevhash)
+{
+	register u_int a, b, c;
+
+	assert(buf);
+
+	a = b = c = INIT_JENKINS32 + (((u_int) len) << 2) + prevhash;
+
+	while (len > 3) {
+		a += buf[0];
+		b += buf[1];
+		c += buf[2];
+		MIX32(a, b, c);
+		len -= 3;
+		buf += 3;
+	}
+
+	switch (len) {
+		case 3:
+			c += buf[2];
+		case 2:
+			b += buf[1];
+		case 1:
+			a += buf[0];
+			FINAL32(a, b, c);
+		case 0:
+			break;
+	}
+
+	return c;
 }