/*
 * Copyright 2017, Adrien Destugues, pulkomandy@pulkomandy.tk
 * Distributed under terms of the MIT license.
 */


#ifndef XMODEM_H
#define XMODEM_H

#include "FileSender.h"

#include <Messenger.h>
#include <String.h>


class BDataIO;
class BHandler;
class BSerialPort;


class XModemSender: public FileSender {
        public:
                                                                XModemSender(BDataIO* source, BSerialPort* sink,
                                                                        BHandler* listener);
                virtual                                 ~XModemSender();

                virtual bool                    BytesReceived(const uint8_t* data,
                                                                        size_t length);
        private:

                                void                    SendBlock();
                                status_t                NextBlock();

                                uint16_t                CRC(const uint8_t* buffer, size_t size);

        private:
                                BDataIO*                fSource;
                                BSerialPort*    fSink;
                                BMessenger              fListener;
                                off_t                   fBlockNumber;
                                off_t                   fSourceSize;
                                uint8_t                 fBuffer[128];
                                bool                    fEotSent;
                                bool                    fUseCRC;
                                BString                 fStatus;
};


#endif /* !XMODEM_H */