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private char readNextChar() throws IOException {
        synchronized (in) {
            if (plain) {
                if (BANDWIDTH_DEBUG) {
                    CasinoServer.bandwidthChecker.addClientMessageReceived(1);
                }
                int c = in.read();
                if (c == -1) {
                    throw new IOException("Client disconnected");
                }
                return (char) c;
            }
            if (num_bytes_read % 5 == 0) {
                if (!isNgClient()) {
                    last_byte_read = readURLEncodedChar();
                } else {
                    if (BANDWIDTH_DEBUG) {
                        CasinoServer.bandwidthChecker.addClientMessageReceived(1);
                    }
                    int c = in.read();
                    if (c == -1) {
                        throw new IOException("Client disconnected");
                    }
                    last_byte_read = c & 0xff;
                }
                ++num_bytes_read;
            }
            int x;
            if (!isNgClient()) {
                x = readURLEncodedChar();
            } else {
                if (BANDWIDTH_DEBUG) {
                    CasinoServer.bandwidthChecker.addClientMessageReceived(1);
                }
                int c = in.read();
                if (c == -1) {
                    throw new IOException("Client disconnected");
                }
                x = c & 0xff;
            }
            last_byte_read ^= x;
            int y = last_byte_read;
            last_byte_read = (x & 0xff);
            ++num_bytes_read;
            return (char) (y & 0xff);
        }
    }