[PATCH v2 2/7] lib-mail: message_address_write: Fix generating group list with empty name

[Pali Rohár]

Empty name for group list must be quoted.

Test case:

  { { name = NULL, mailbox = "", domain = NULL }, { name = NULL, mailbox = NULL, domain = NULL } }

converts to:

  "":;
---
 src/lib-mail/message-address.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/lib-mail/message-address.c b/src/lib-mail/message-address.c
index efa91fd..9ce4a55 100644
--- a/src/lib-mail/message-address.c
+++ b/src/lib-mail/message-address.c
@@ -357,8 +357,12 @@ void message_address_write(string_t *str, const struct message_address *addr)
 			if (!in_group) {
 				/* beginning of group. mailbox is the group
 				   name, others are NULL. */
-				if (addr->mailbox != NULL)
+				if (addr->mailbox != NULL && *addr->mailbox != '\0') {
 					str_append(str, addr->mailbox);
+				} else {
+					/* empty group name needs to be quoted */
+					str_append(str, "\"\"");
+				}
 				str_append(str, ": ");
 				first = TRUE;
 			} else {
-- 
1.7.9.5