Function appendCommand

src/t_string.cpp:676–706

}

void appendCommand(client *c) {
    size_t totlen;
    robj *o, *append;

    o = lookupKeyWrite(c->db,c->argv[1]);
    if (o == NULL) {
        /* Create the key */
        c->argv[2] = tryObjectEncoding(c->argv[2]);
        dbAdd(c->db,c->argv[1],c->argv[2]);
        incrRefCount(c->argv[2]);
        totlen = stringObjectLen(c->argv[2]);
    } else {
        /* Key exists, check type */
        if (checkType(c,o,OBJ_STRING))
            return;

        /* "append" is an argument, so always an sds */
        append = c->argv[2];
        if (checkStringLength(c,stringObjectLen(o),sdslen((sds)ptrFromObj(append))) != C_OK)
            return;

        /* Append the value */
        o = dbUnshareStringValue(c->db,c->argv[1],o);
        o->m_ptr = sdscatlen((sds)ptrFromObj(o),ptrFromObj(append),sdslen((sds)ptrFromObj(append)));
        totlen = sdslen((sds)ptrFromObj(o));
    }
    signalModifiedKey(c,c->db,c->argv[1]);
    notifyKeyspaceEvent(NOTIFY_STRING,"append",c->argv[1],c->db->id);
    g_pserver->dirty++;
    addReplyLongLong(c,totlen);
}

void strlenCommand(client *c) {
    robj_roptr o;