#include "project.h"

unsigned block_stdio;

int
_open (const char *name, int flags, int mode)
{
  errno = ENOSYS;
  return -1;                    /* Always fails */

}                               /* _open () */

int
_close (int file)
{
  errno = EBADF;
  return -1;                    /* Always fails */

}                               /* _close () */

int
_write (int file, char *buf, int nbytes)
{

  int ret = nbytes;

  if (!block_stdio)
    ret = usart1_write (buf, nbytes, 1);

  if (ret < 0) {
    errno = -ret;
    return -1;
  }

  return ret;
}                               /* _write () */


int
_read (int file, char *buf, int nbytes)
{

  errno = -EAGAIN;
  return -1;                    /* EOF */

}                               /* _read () */

#if 0
int
_fstat (int file, struct stat *st)
{
  st->st_mode = S_IFCHR;
  return 0;

}                               /* _fstat () */
#endif

int
_lseek (int file, int offset, int whence)
{
  return 0;

}                               /* _lseek () */

int
isatty (int file)
{
  return 1;

}                               /* _isatty () */


void
stdio_drain (void)
{
  usart1_drain();
}