lib: prefix.c nano-optimisation
* lib/prefix.c: (prefix_match) nano-optimisation, let it return early
without copying pointers.
diff --git a/lib/prefix.c b/lib/prefix.c
index 7dc866d..61a278c 100644
--- a/lib/prefix.c
+++ b/lib/prefix.c
@@ -70,15 +70,16 @@
{
int offset;
int shift;
-
- /* Set both prefix's head pointer. */
- const u_char *np = (const u_char *)&n->u.prefix;
- const u_char *pp = (const u_char *)&p->u.prefix;
+ const u_char *np, *pp;
/* If n's prefix is longer than p's one return 0. */
if (n->prefixlen > p->prefixlen)
return 0;
+ /* Set both prefix's head pointer. */
+ np = (const u_char *)&n->u.prefix;
+ pp = (const u_char *)&p->u.prefix;
+
offset = n->prefixlen / PNBBY;
shift = n->prefixlen % PNBBY;