serial_io.h

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/***********************************************************************/
#ifndef SERIAL_IO_H_
#define SERIAL_IO_H_
 
#include "ascii_support.h"
 
class serial_input
{
public:
    int  geti( void);
    virtual bool input_ready(void)
    {
      return false; // ... just a stub
    }
    virtual char get( void)
    {
      return 0;   // another stub, function should have a return value
    }
    virtual char get_blocking( void)
    {
      return get(); // default if blocking not supported
    }
};
 
class serial_output
{
public:
    virtual void put( char) // another stub
    {
    }
    void puti( int value, int base=10);
    void putx( int32_t value, uint8_t digits = 8);
    void putf( float value);
    virtual void puts( const char * data);
    void newline( void);
    void blank( void);
};
 
class serial_io: public serial_output, public serial_input
{
};
 
template <unsigned size> class ascii_string_writer : public serial_output
{
public:
  ascii_string_writer(void)
  : p(buf)
  {
    *p=0;
  }
  void put( char c)
  {
    if(( buf+size-p) < 2)
      return; // buffer full, give up silently
    *p++ = c;
    *p = 0;
  }
  void puts( char *c)
  {
    while( (buf+size-p) >= 2)
      *p++=*c++;
    *p=0;
  }
  void putf( float value)
  {
    if( (buf+size-p) <10)
      return;
    ftoa( p, value);
    while( *p)
      ++p;
  }
    const char *get_content(void)
  {
    return buf;
  }
private:
  char buf[size];
  char *p;
};
 
#endif /* SERIAL_IO_H_ */