Add function to create ziplist-backed sorted set

src/object.c

@@ -93,12 +93,18 @@ robj *createHashObject(void) {
 
 robj *createZsetObject(void) {
     zset *zs = zmalloc(sizeof(*zs));
-
     zs->dict = dictCreate(&zsetDictType,NULL);
     zs->zsl = zslCreate();
     return createObject(REDIS_ZSET,zs);
 }
 
+robj *createZsetZiplistObject(void) {
+    unsigned char *zl = ziplistNew();
+    robj *o = createObject(REDIS_ZSET,zl);
+    o->encoding = REDIS_ENCODING_ZIPLIST;
+    return o;
+}
+
 void freeStringObject(robj *o) {
     if (o->encoding == REDIS_ENCODING_RAW) {
         sdsfree(o->ptr);

src/redis.h

@@ -730,6 +730,7 @@ robj *createSetObject(void);
 robj *createIntsetObject(void);
 robj *createHashObject(void);
 robj *createZsetObject(void);
+robj *createZsetZiplistObject(void);
 int getLongFromObjectOrReply(redisClient *c, robj *o, long *target, const char *msg);
 int checkType(redisClient *c, robj *o, int type);
 int getLongLongFromObjectOrReply(redisClient *c, robj *o, long long *target, const char *msg);