Function checkType

src/object.cpp:440–447

}

int checkType(client *c, robj_roptr o, int type) {
    /* A NULL is considered an empty key */
    if (o && o->type != type) {
        addReplyErrorObject(c,shared.wrongtypeerr);
        return 1;
    }
    return 0;
}

int isSdsRepresentableAsLongLong(const char *s, long long *llval) {
    return string2ll(s,sdslen(s),llval) ? C_OK : C_ERR;