inline static function readTagList():Array<SWFTag>
    {
        var tags:Array<SWFTag>=new Array();
        while(true)
        {
            var t = readTag();
            if( t == null )
                break;
            tags.push(t);
        }
        return tags;
    }

    inline static function readTag():SWFTag
    {
        var h = i.readUInt16();
        var id = h >> 6;
        var len = h & 63;
        if( len == 63 )
            len = i.readUInt30();
        return id==0?null:TUnknown(id,i.read(len));
    }