#ifndef __SHELL_H__
#define __SHELL_H__

#include "util/minimal_io.h"

class Shell : public MinimalIO {
  protected:
    Shell();
    Shell(const Shell &orig);
  public:
    virtual ~Shell();
    virtual void initialize() = 0;
    virtual unsigned int receive(char *buf, const unsigned int &buf_size) = 0;
    virtual unsigned int transmit(const char *buf, const unsigned int &buf_size) = 0;
};

extern Shell &shell;

#endif /* __SHELL_H__ */