From 0103f42343be18b697169f73f9f3caa81c19e32f Mon Sep 17 00:00:00 2001
From: Mark Andrews <marka@isc.org>
Date: Mon, 22 May 2000 12:34:16 +0000
Subject: [PATCH] Add comment about requiring pointers to memory block to be
 NULL if the corresponding length is 0, non-NULL otherwise.

---
 lib/dns/include/dns/rdata.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/dns/include/dns/rdata.h b/lib/dns/include/dns/rdata.h
index b01e6a920e..badbd738a6 100644
--- a/lib/dns/include/dns/rdata.h
+++ b/lib/dns/include/dns/rdata.h
@@ -386,6 +386,9 @@ isc_result_t dns_rdata_fromstruct(dns_rdata_t *rdata,
  *
  *	'target' is a valid binary buffer.
  *
+ *	All structure pointers to memory blocks should be NULL if their
+ *	corresponding length values are zero.
+ *
  * Ensures:
  *	If result is success:
  *	 	If 'rdata' is not NULL, it is attached to the target.