Add one helper function for subscribe and ssubscribe command

Signed-off-by: hwware <[email protected]>

Author: hwware

src/pubsub.c

@@ -533,21 +533,8 @@ int pubsubPublishMessage(robj *channel, robj *message, int sharded) {
  * Pubsub commands implementation
  *----------------------------------------------------------------------------*/
 
-/* SUBSCRIBE channel [channel ...] */
-void subscribeCommand(client *c) {
+void addPubSubChannel(client *c, pubsubtype type) {
     int j;
-    if (c->flag.deny_blocking && !c->flag.multi) {
-        /**
-         * A client that has CLIENT_DENY_BLOCKING flag on
-         * expect a reply per command and so can not execute subscribe.
-         *
-         * Notice that we have a special treatment for multi because of
-         * backward compatibility
-         */
-        addReplyError(c, "SUBSCRIBE isn't allowed for a DENY BLOCKING client");
-        return;
-    }
-
     struct ClientFlags old_flags = c->flag;
     c->flag.pushing = 1;
     int number = (c->argc - 1) * 3;
@@ -558,12 +545,29 @@ void subscribeCommand(client *c) {
         addReplyPushLen(c, number);
 
     for (j = 1; j < c->argc; j++) {
-        pubsubSubscribeChannel(c, c->argv[j], pubSubType);
-        addReply(c, *pubSubType.subscribeMsg);
+        pubsubSubscribeChannel(c, c->argv[j], type);
+        addReply(c, *type.subscribeMsg);
         addReplyBulk(c, c->argv[j]);
-        addReplyLongLong(c, pubSubType.subscriptionCount(c));
+        addReplyLongLong(c, type.subscriptionCount(c));
     }
     if (!old_flags.pushing) c->flag.pushing = 0;
+}
+
+
+/* SUBSCRIBE channel [channel ...] */
+void subscribeCommand(client *c) {
+    if (c->flag.deny_blocking && !c->flag.multi) {
+        /**
+         * A client that has CLIENT_DENY_BLOCKING flag on
+         * expect a reply per command and so can not execute subscribe.
+         *
+         * Notice that we have a special treatment for multi because of
+         * backward compatibility
+         */
+        addReplyError(c, "SUBSCRIBE isn't allowed for a DENY BLOCKING client");
+        return;
+    }
+    addPubSubChannel(c, pubSubType);
 
     markClientAsPubSub(c);
 }
@@ -730,24 +734,8 @@ void ssubscribeCommand(client *c) {
         addReplyError(c, "SSUBSCRIBE isn't allowed for a DENY BLOCKING client");
         return;
     }
-    int j;
-
-    struct ClientFlags old_flags = c->flag;
-    c->flag.pushing = 1;
-    int number = (c->argc - 1) * 3;
 
-    if (c->resp == 2)
-        addReply(c, shared.mbulkhdr[number]);
-    else
-        addReplyPushLen(c, number);
-
-    for (j = 1; j < c->argc; j++) {
-        pubsubSubscribeChannel(c, c->argv[j], pubSubShardType);
-        addReply(c, *pubSubShardType.subscribeMsg);
-        addReplyBulk(c, c->argv[j]);
-        addReplyLongLong(c, pubSubShardType.subscriptionCount(c));
-    }
-    if (!old_flags.pushing) c->flag.pushing = 0;
+    addPubSubChannel(c, pubSubShardType);
     markClientAsPubSub(c);
 }