Esempi in C++ (Cpp) per _IO_old_init

Esempio n. 1

File: genops.c Progetto: eva-oss/glibc-linaro

void
_IO_no_init (_IO_FILE *fp, int flags, int orientation,
	     struct _IO_wide_data *wd, const struct _IO_jump_t *jmp)
{
  _IO_old_init (fp, flags);
  fp->_mode = orientation;
#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
  if (orientation >= 0)
    {
      fp->_wide_data = wd;
      fp->_wide_data->_IO_buf_base = NULL;
      fp->_wide_data->_IO_buf_end = NULL;
      fp->_wide_data->_IO_read_base = NULL;
      fp->_wide_data->_IO_read_ptr = NULL;
      fp->_wide_data->_IO_read_end = NULL;
      fp->_wide_data->_IO_write_base = NULL;
      fp->_wide_data->_IO_write_ptr = NULL;
      fp->_wide_data->_IO_write_end = NULL;
      fp->_wide_data->_IO_save_base = NULL;
      fp->_wide_data->_IO_backup_base = NULL;
      fp->_wide_data->_IO_save_end = NULL;

      fp->_wide_data->_wide_vtable = jmp;
    }
  else
    /* Cause predictable crash when a wide function is called on a byte
       stream.  */
    fp->_wide_data = (struct _IO_wide_data *) -1L;
#endif
  fp->_freeres_list = NULL;
}

Esempio n. 2

File: oldiofdopen.c Progetto: RobbenBasten/glibc

attribute_compat_text_section
_IO_old_fdopen (int fd, const char *mode)
{
  int read_write;
  int posix_mode = 0;
  struct locked_FILE
  {
    struct _IO_FILE_complete_plus fp;
#ifdef _IO_MTSAFE_IO
    _IO_lock_t lock;
#endif
  } *new_f;
  int fd_flags;

  switch (*mode++)
    {
    case 'r':
      read_write = _IO_NO_WRITES;
      break;
    case 'w':
      read_write = _IO_NO_READS;
      break;
    case 'a':
      posix_mode = O_APPEND;
      read_write = _IO_NO_READS|_IO_IS_APPENDING;
      break;
    default:
      MAYBE_SET_EINVAL;
      return NULL;
  }
  if (mode[0] == '+' || (mode[0] == 'b' && mode[1] == '+'))
    read_write &= _IO_IS_APPENDING;
#ifdef F_GETFL
  fd_flags = _IO_fcntl (fd, F_GETFL);
#ifndef O_ACCMODE
#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
#endif
  if (fd_flags == -1
      || ((fd_flags & O_ACCMODE) == O_RDONLY && !(read_write & _IO_NO_WRITES))
      || ((fd_flags & O_ACCMODE) == O_WRONLY && !(read_write & _IO_NO_READS)))
    return NULL;

  /* The May 93 draft of P1003.4/D14.1 (redesignated as 1003.1b)
     [System Application Program Interface (API) Amendment 1:
     Realtime Extensions], Rationale B.8.3.3
     Open a Stream on a File Descriptor says:

         Although not explicitly required by POSIX.1, a good
         implementation of append ("a") mode would cause the
         O_APPEND flag to be set.

     (Historical implementations [such as Solaris2] do a one-time
     seek in fdopen.)

     However, we do not turn O_APPEND off if the mode is "w" (even
     though that would seem consistent) because that would be more
     likely to break historical programs.
     */
  if ((posix_mode & O_APPEND) && !(fd_flags & O_APPEND))
    {
#ifdef F_SETFL
      if (_IO_fcntl (fd, F_SETFL, fd_flags | O_APPEND) == -1)
#endif
	return NULL;
    }
#endif

  new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
  if (new_f == NULL)
    return NULL;
#ifdef _IO_MTSAFE_IO
  new_f->fp.file._file._lock = &new_f->lock;
#endif
  _IO_old_init (&new_f->fp.file._file, 0);
  _IO_JUMPS_FILE_plus (&new_f->fp) = &_IO_old_file_jumps;
  _IO_old_file_init ((struct _IO_FILE_plus *) &new_f->fp);
#if  !_IO_UNIFIED_JUMPTABLES
  new_f->fp.vtable = NULL;
#endif
  if (_IO_old_file_attach (&new_f->fp.file._file, fd) == NULL)
    {
      _IO_un_link ((struct _IO_FILE_plus *) &new_f->fp);
      free (new_f);
      return NULL;
    }
  new_f->fp.file._file._flags &= ~_IO_DELETE_DONT_CLOSE;

  _IO_mask_flags (&new_f->fp.file._file, read_write,
		  _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING);

  return (_IO_FILE *) &new_f->fp;
}