From: Mark Wooding <mdw@distorted.org.uk>
Date: Tue, 22 Apr 2014 13:14:24 +0000 (+0100)
Subject: addr-family-ipv6.lisp (ipaddr-string): Ignore trivial runs of zeros.
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/zone/commitdiff_plain/78c686d3a9b0c6f0abed0e78b3879756edfac3ea

addr-family-ipv6.lisp (ipaddr-string): Ignore trivial runs of zeros.

It seems that the convention is to write addresses out longhand if they
have only isolated zero components.  So do that here too.
---

diff --git a/addr-family-ipv6.lisp b/addr-family-ipv6.lisp
index e9dd1aa..5ed014e 100644
--- a/addr-family-ipv6.lisp
+++ b/addr-family-ipv6.lisp
@@ -168,7 +168,7 @@ (defmethod ipaddr-string ((ip ip6addr))
 		     (incf i)
 		     (when (>= i end) (return))
 		     (write-char #\: out))))))
-	(cond ((null best-start)
+	(cond ((< best-length 2)
 	       (chunk 0 8))
 	      ((and (= best-start 0)
 		    (or (and (= best-length 5)