- return None
-
-
-def _windows_write_string(s, out):
- """ Returns True if the string was written using special methods,
- False if it has yet to be written out."""
- # Adapted from http://stackoverflow.com/a/3259271/35070
-
- import ctypes.wintypes
-
- WIN_OUTPUT_IDS = {
- 1: -11,
- 2: -12,
- }
-
- try:
- fileno = out.fileno()
- except AttributeError:
- # If the output stream doesn't have a fileno, it's virtual
- return False
- except io.UnsupportedOperation:
- # Some strange Windows pseudo files?
- return False
- if fileno not in WIN_OUTPUT_IDS:
- return False
-
- GetStdHandle = compat_ctypes_WINFUNCTYPE(
- ctypes.wintypes.HANDLE, ctypes.wintypes.DWORD)(
- ('GetStdHandle', ctypes.windll.kernel32))
- h = GetStdHandle(WIN_OUTPUT_IDS[fileno])
-
- WriteConsoleW = compat_ctypes_WINFUNCTYPE(
- ctypes.wintypes.BOOL, ctypes.wintypes.HANDLE, ctypes.wintypes.LPWSTR,
- ctypes.wintypes.DWORD, ctypes.POINTER(ctypes.wintypes.DWORD),
- ctypes.wintypes.LPVOID)(('WriteConsoleW', ctypes.windll.kernel32))
- written = ctypes.wintypes.DWORD(0)
-
- GetFileType = compat_ctypes_WINFUNCTYPE(ctypes.wintypes.DWORD, ctypes.wintypes.DWORD)(('GetFileType', ctypes.windll.kernel32))
- FILE_TYPE_CHAR = 0x0002
- FILE_TYPE_REMOTE = 0x8000
- GetConsoleMode = compat_ctypes_WINFUNCTYPE(
- ctypes.wintypes.BOOL, ctypes.wintypes.HANDLE,
- ctypes.POINTER(ctypes.wintypes.DWORD))(
- ('GetConsoleMode', ctypes.windll.kernel32))
- INVALID_HANDLE_VALUE = ctypes.wintypes.DWORD(-1).value
-
- def not_a_console(handle):
- if handle == INVALID_HANDLE_VALUE or handle is None:
- return True
- return ((GetFileType(handle) & ~FILE_TYPE_REMOTE) != FILE_TYPE_CHAR
- or GetConsoleMode(handle, ctypes.byref(ctypes.wintypes.DWORD())) == 0)
-
- if not_a_console(h):
- return False
-
- def next_nonbmp_pos(s):
- try:
- return next(i for i, c in enumerate(s) if ord(c) > 0xffff)
- except StopIteration:
- return len(s)
-
- while s:
- count = min(next_nonbmp_pos(s), 1024)
-
- ret = WriteConsoleW(
- h, s, count if count else 2, ctypes.byref(written), None)
- if ret == 0:
- raise OSError('Failed to write string')
- if not count: # We just wrote a non-BMP character
- assert written.value == 2
- s = s[1:]
- else:
- assert written.value > 0
- s = s[written.value:]
- return True