fix_encoding.py 文件源码

def win_handle_is_a_console(handle):
  """Returns True if a Windows file handle is a handle to a console."""
  # These types are available on linux but not Mac.
  # pylint: disable=no-name-in-module,F0401
  from ctypes import byref, POINTER, windll, WINFUNCTYPE
  from ctypes.wintypes import BOOL, DWORD, HANDLE

  FILE_TYPE_CHAR   = 0x0002
  FILE_TYPE_REMOTE = 0x8000
  INVALID_HANDLE_VALUE = DWORD(-1).value

  # <http://msdn.microsoft.com/en-us/library/ms683167.aspx>
  GetConsoleMode = WINFUNCTYPE(BOOL, HANDLE, POINTER(DWORD))(
      ('GetConsoleMode', windll.kernel32))
  # <http://msdn.microsoft.com/en-us/library/aa364960.aspx>
  GetFileType = WINFUNCTYPE(DWORD, DWORD)(('GetFileType', windll.kernel32))

  # GetStdHandle returns INVALID_HANDLE_VALUE, NULL, or a valid handle.
  if handle == INVALID_HANDLE_VALUE or handle is None:
    return False
  return (
      (GetFileType(handle) & ~FILE_TYPE_REMOTE) == FILE_TYPE_CHAR and
       GetConsoleMode(handle, byref(DWORD())))