From 2c643ffa8d08daa06dd7abc7a07223851115a58a Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 28 Oct 2013 11:36:42 +0100
Subject: [PATCH] ZSCAN implemented.

---
 src/redis.c  | 1 +
 src/redis.h  | 1 +
 src/t_zset.c | 8 ++++++++
 3 files changed, 10 insertions(+)

diff --git a/src/redis.c b/src/redis.c
index f44c9908d..7932824e7 100644
--- a/src/redis.c
+++ b/src/redis.c
@@ -182,6 +182,7 @@ struct redisCommand redisCommandTable[] = {
     {"zscore",zscoreCommand,3,"r",0,NULL,1,1,1,0,0},
     {"zrank",zrankCommand,3,"r",0,NULL,1,1,1,0,0},
     {"zrevrank",zrevrankCommand,3,"r",0,NULL,1,1,1,0,0},
+    {"zscan",zscanCommand,-3,"rR",0,NULL,1,1,1,0,0},
     {"hset",hsetCommand,4,"wm",0,NULL,1,1,1,0,0},
     {"hsetnx",hsetnxCommand,4,"wm",0,NULL,1,1,1,0,0},
     {"hget",hgetCommand,3,"r",0,NULL,1,1,1,0,0},
diff --git a/src/redis.h b/src/redis.h
index 55c3ea77c..4312b3421 100644
--- a/src/redis.h
+++ b/src/redis.h
@@ -1340,6 +1340,7 @@ void hlenCommand(redisClient *c);
 void zremrangebyrankCommand(redisClient *c);
 void zunionstoreCommand(redisClient *c);
 void zinterstoreCommand(redisClient *c);
+void zscanCommand(redisClient *c);
 void hkeysCommand(redisClient *c);
 void hvalsCommand(redisClient *c);
 void hgetallCommand(redisClient *c);
diff --git a/src/t_zset.c b/src/t_zset.c
index 1fcfd6bb6..9d3a79026 100644
--- a/src/t_zset.c
+++ b/src/t_zset.c
@@ -2207,3 +2207,11 @@ void zrankCommand(redisClient *c) {
 void zrevrankCommand(redisClient *c) {
     zrankGenericCommand(c, 1);
 }
+
+void zscanCommand(redisClient *c) {
+    robj *o;
+
+    if ((o= lookupKeyReadOrReply(c,c->argv[1],shared.emptyscan)) == NULL ||
+        checkType(c,o,REDIS_ZSET)) return;
+    scanGenericCommand(c,o);
+}