Add addReplyBulkSds() function

Refactor a common pattern into one function so we don't
end up with copy/paste programming.

src/cluster.c

@@ -3886,10 +3886,7 @@ void clusterCommand(redisClient *c) {
             server.cluster->stats_bus_messages_sent,
             server.cluster->stats_bus_messages_received
         );
-        addReplySds(c,sdscatprintf(sdsempty(),"$%lu\r\n",
-            (unsigned long)sdslen(info)));
-        addReplySds(c,info);
-        addReply(c,shared.crlf);
+        addReplyBulkSds(c, info);
     } else if (!strcasecmp(c->argv[1]->ptr,"saveconfig") && c->argc == 2) {
         int retval = clusterSaveConfig(1);
 

src/networking.c

@@ -525,6 +525,14 @@ void addReplyBulkCBuffer(redisClient *c, void *p, size_t len) {
     addReply(c,shared.crlf);
 }
 
+/* Add sds to reply (takes ownership of sds and frees it) */
+void addReplyBulkSds(redisClient *c, sds s)  {
+    addReplySds(c,sdscatfmt(sdsempty(),"$%u\r\n",
+        (unsigned long)sdslen(s)));
+    addReplySds(c,s);
+    addReply(c,shared.crlf);
+}
+
 /* Add a C nul term string as bulk reply */
 void addReplyBulkCString(redisClient *c, char *s) {
     if (s == NULL) {

src/redis.c

@@ -3058,11 +3058,7 @@ void infoCommand(redisClient *c) {
         addReply(c,shared.syntaxerr);
         return;
     }
-    sds info = genRedisInfoString(section);
-    addReplySds(c,sdscatprintf(sdsempty(),"$%lu\r\n",
-        (unsigned long)sdslen(info)));
-    addReplySds(c,info);
-    addReply(c,shared.crlf);
+    addReplyBulkSds(c, genRedisInfoString(section));
 }
 
 void monitorCommand(redisClient *c) {

src/redis.h

@@ -1043,6 +1043,7 @@ void addReplyBulkCBuffer(redisClient *c, void *p, size_t len);
 void addReplyBulkLongLong(redisClient *c, long long ll);
 void addReply(redisClient *c, robj *obj);
 void addReplySds(redisClient *c, sds s);
+void addReplyBulkSds(redisClient *c, sds s);
 void addReplyError(redisClient *c, char *err);
 void addReplyStatus(redisClient *c, char *status);
 void addReplyDouble(redisClient *c, double d);

src/sentinel.c

@@ -2908,10 +2908,7 @@ void sentinelInfoCommand(redisClient *c) {
         dictReleaseIterator(di);
     }
 
-    addReplySds(c,sdscatprintf(sdsempty(),"$%lu\r\n",
-        (unsigned long)sdslen(info)));
-    addReplySds(c,info);
-    addReply(c,shared.crlf);
+    addReplyBulkSds(c, info);
 }
 
 /* Implements Sentinel verison of the ROLE command. The output is