connectionDevice.h

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#ifndef CONNECTION_DEVICE_H
#define CONNECTION_DEVICE_H

#include "ringBufferTemplate.h"
#include <exception>
#include <string>


class ConnectionDevice {
  std::string device_name;
  long baudrate_value;

  virtual int raw_connect(const char* device, long baudrate) = 0;

  virtual void raw_disconnect(void) = 0;
  virtual int raw_setBaudrate(long baudrate) = 0;

  virtual int raw_send(const char* data, int len) = 0;
  virtual void raw_flush(void) = 0;
  virtual void raw_check(int size, long timeout = 0) = 0;
  void check(int size, long timeout = 0);
  ConnectionDevice(const ConnectionDevice& rhs);

protected:
  enum { BufferSize = 4096 };
  RingBuffer<char> *recv_buffer; 
public:
  enum {
    NotConnected = -2,
    DeviceOpenFail = -3,
    InvalidBaudrate = -4,
    BaudrateAdjustFail = -5,
    RecvTimeout = -6,
    LibraryInitFail = -7,
    RetryFail = -8,
    FailCheckVersion = -9,
  };

  ConnectionDevice(int buffer_size = BufferSize-1);
  virtual ~ConnectionDevice(void);

  virtual const char* what(void) = 0;

  int connect(const char* device, long baudrate);

  void disconnect(void);

  int setBaudrate(long baudrate);

  virtual bool isConnected(void) = 0;

  void flush(void);

  int send(const char* data, int len);

  virtual int recv(char* data, int maxlen, long timeout = 0);

  int copy(char *data, int maxlen);

  int size(void);

  int capacity(void);

  const char* getDevice(void);

  long getBaudrate(void);
};


class ConnectionDevice_Exception : public std::exception {
  std::string error_message;

public:
  ConnectionDevice_Exception(const char* message) : error_message(message) {}
  virtual ~ConnectionDevice_Exception(void) throw () {}

  virtual const char* what(void) const throw() {
    return error_message.c_str();
  }
};

#endif /* !CONNECTION_DEVICE_H */