Function rewriteSetObject

app/redis-6.2.6/src/aof.c:1037–1090

Emit the commands needed to rebuild a set object. * The function returns 0 on error, 1 on success. */

/* Emit the commands needed to rebuild a set object.
 * The function returns 0 on error, 1 on success. */
int rewriteSetObject(rio *r, robj *key, robj *o) {
    long long count = 0, items = setTypeSize(o);

    if (o->encoding == OBJ_ENCODING_INTSET) {
        int ii = 0;
        int64_t llval;

        while(intsetGet(o->ptr,ii++,&llval)) {
            if (count == 0) {
                int cmd_items = (items > AOF_REWRITE_ITEMS_PER_CMD) ?
                    AOF_REWRITE_ITEMS_PER_CMD : items;

                if (!rioWriteBulkCount(r,'*',2+cmd_items) ||
                    !rioWriteBulkString(r,"SADD",4) ||
                    !rioWriteBulkObject(r,key)) 
                {
                    return 0;
                }
            }
            if (!rioWriteBulkLongLong(r,llval)) return 0;
            if (++count == AOF_REWRITE_ITEMS_PER_CMD) count = 0;
            items--;
        }
    } else if (o->encoding == OBJ_ENCODING_HT) {
        dictIterator *di = dictGetIterator(o->ptr);
        dictEntry *de;

        while((de = dictNext(di)) != NULL) {
            sds ele = dictGetKey(de);
            if (count == 0) {
                int cmd_items = (items > AOF_REWRITE_ITEMS_PER_CMD) ?
                    AOF_REWRITE_ITEMS_PER_CMD : items;

                if (!rioWriteBulkCount(r,'*',2+cmd_items) ||
                    !rioWriteBulkString(r,"SADD",4) ||
                    !rioWriteBulkObject(r,key)) 
                {
                    dictReleaseIterator(di);
                    return 0;
                }
            }
            if (!rioWriteBulkString(r,ele,sdslen(ele))) {
                dictReleaseIterator(di);
                return 0;          
            }
            if (++count == AOF_REWRITE_ITEMS_PER_CMD) count = 0;
            items--;
        }
        dictReleaseIterator(di);
    } else {
        serverPanic("Unknown set encoding");
    }
    return 1;
}

/* Emit the commands needed to rebuild a sorted set object.
 * The function returns 0 on error, 1 on success. */