Function setTypeConvert

src/t_set.cpp:243–270

Convert the set to specified encoding. The resulting dict (when converting * to a hash table) is presized to hold the number of elements in the original * set. */

 * to a hash table) is presized to hold the number of elements in the original
 * set. */
void setTypeConvert(robj *setobj, int enc) {
    setTypeIterator *si;
    serverAssertWithInfo(NULL,setobj,setobj->type == OBJ_SET &&
                             setobj->encoding == OBJ_ENCODING_INTSET);

    if (enc == OBJ_ENCODING_HT) {
        int64_t intele;
        dict *d = dictCreate(&setDictType,NULL);
        const char *element;

        /* Presize the dict to avoid rehashing */
        dictExpand(d,intsetLen((intset*)setobj->m_ptr));

        /* To add the elements we extract integers and create redis objects */
        si = setTypeInitIterator(setobj);
        while (setTypeNext(si,&element,&intele) != -1) {
            sds elementNew = sdsfromlonglong(intele);
            serverAssert(dictAdd(d,elementNew,NULL) == DICT_OK);
        }
        setTypeReleaseIterator(si);

        setobj->encoding = OBJ_ENCODING_HT;
        zfree(setobj->m_ptr);
        setobj->m_ptr = d;
    } else {
        serverPanic("Unsupported set conversion");
    }
}

/* This is a helper function for the COPY command.
 * Duplicate a set object, with the guarantee that the returned object