dst[dstIndex++] = (byte)(( val >> 8 ) & 0xFF );
        dst[dstIndex] = (byte)( val & 0xFF );
    }
    static void writeInt4( int val, byte[] dst, int dstIndex ) {
        dst[dstIndex++] = (byte)(( val >> 24 ) & 0xFF );
        dst[dstIndex++] = (byte)(( val >> 16 ) & 0xFF );
        dst[dstIndex++] = (byte)(( val >> 8 ) & 0xFF );
        dst[dstIndex] = (byte)( val & 0xFF );
    }

    /**
     * 
     */
    public static final byte[] UNSPECIFIED_FILEID = new byte[] {
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF,
        (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF, (byte) 0xFF
    };

    /**
     * 
     */
    public static final int UNSPECIFIED_TREEID = 0xFFFFFFFF;

    /**

    }

    static int readULong(byte[] src, int index) {
        return (src[index] & 0xff) |
                ((src[index + 1] & 0xff) << 8) |
                ((src[index + 2] & 0xff) << 16) |
                ((src[index + 3] & 0xff) << 24);
    }

    static int readUShort(byte[] src, int index) {
        return (src[index] & 0xff) | ((src[index + 1] & 0xff) << 8);
    }

    static byte[] readSecurityBuffer(byte[] src, int index) {

        dst[ dstIndex++ ] = (byte) ( ( val >> 8 ) & 0xFF );
        dst[ dstIndex ] = (byte) ( val & 0xFF );
    }


    static void writeInt4 ( int val, byte[] dst, int dstIndex ) {
        dst[ dstIndex++ ] = (byte) ( ( val >> 24 ) & 0xFF );
        dst[ dstIndex++ ] = (byte) ( ( val >> 16 ) & 0xFF );
        dst[ dstIndex++ ] = (byte) ( ( val >> 8 ) & 0xFF );
        dst[ dstIndex ] = (byte) ( val & 0xFF );
    }

        int mshigh = msbit >>> 3, mslow = msbit & 7;
        int b = c + ( out[ i % olen ] & 0xff ) + ( ( ( ( ( data[ ( ( ilen - 1 ) - mshigh ) % ilen ] & 0xff ) << 8 )
                | ( data[ ( ilen - mshigh ) % ilen ] & 0xff ) ) >>> ( mslow + 1 ) ) & 0xff );
        out[ i % olen ] = (byte) ( b & 0xff );
        return b >>>= 8;
    }


    private static int lcm ( int u, int v ) {

    val version = fromSource.readByte() and 0xff
    if (version != VERSION_5) throw ProtocolException("unexpected version: $version")

    val command = fromSource.readByte() and 0xff

    val reserved = fromSource.readByte() and 0xff
    if (reserved != 0) throw ProtocolException("unexpected reserved: $reserved")

    val addressType = fromSource.readByte() and 0xff
    val toAddress =
      when (addressType) {

        return ( src[ srcIndex ] & 0xFF ) + ( ( src[ srcIndex + 1 ] & 0xFF ) << 8 );
    }


    public static int readInt4 ( byte[] src, int srcIndex ) {
        return ( src[ srcIndex ] & 0xFF ) + ( ( src[ srcIndex + 1 ] & 0xFF ) << 8 ) + ( ( src[ srcIndex + 2 ] & 0xFF ) << 16 )
                + ( ( src[ srcIndex + 3 ] & 0xFF ) << 24 );
    }

        key8[ 1 ] = (byte) ( ( key[ 0 ] << 7 ) | ( ( key[ 1 ] & 0xFF ) >>> 1 ) );
        key8[ 2 ] = (byte) ( ( key[ 1 ] << 6 ) | ( ( key[ 2 ] & 0xFF ) >>> 2 ) );
        key8[ 3 ] = (byte) ( ( key[ 2 ] << 5 ) | ( ( key[ 3 ] & 0xFF ) >>> 3 ) );
        key8[ 4 ] = (byte) ( ( key[ 3 ] << 4 ) | ( ( key[ 4 ] & 0xFF ) >>> 4 ) );
        key8[ 5 ] = (byte) ( ( key[ 4 ] << 3 ) | ( ( key[ 5 ] & 0xFF ) >>> 5 ) );

    var accumulatorBitCount = 0
    for (i in 0 until byteCount) {
      val byteIn = source.readByte() and 0xff
      accumulator = accumulator shl 8 or byteIn
      accumulatorBitCount += 8
      while (accumulatorBitCount >= 8) {
        val childIndex = (accumulator ushr (accumulatorBitCount - 8)) and 0xff
        node = node.children!![childIndex]!!
        if (node.children == null) {
          // Terminal node.

            block = (ALPHABET.indexOf(string.charAt(i++)) & 0xff) << 18 |
                    (ALPHABET.indexOf(string.charAt(i++)) & 0xff) << 12 |
                    (ALPHABET.indexOf(string.charAt(i++)) & 0xff) << 6 |
                    (ALPHABET.indexOf(string.charAt(i++)) & 0xff);
            buffer[index++] = (byte) (block >>> 16);
            if (index < size) buffer[index++] = (byte) ((block >>> 8) & 0xff);