Move Windows libs to libs/windows

libs/win/jaraco/windows/error.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python
+
+import sys
+
+import ctypes
+import ctypes.wintypes
+
+import six
+builtins = six.moves.builtins
+
+
+__import__('jaraco.windows.api.memory')
+
+
+def format_system_message(errno):
+	"""
+	Call FormatMessage with a system error number to retrieve
+	the descriptive error message.
+	"""
+	# first some flags used by FormatMessageW
+	ALLOCATE_BUFFER = 0x100
+	FROM_SYSTEM = 0x1000
+
+	# Let FormatMessageW allocate the buffer (we'll free it below)
+	# Also, let it know we want a system error message.
+	flags = ALLOCATE_BUFFER | FROM_SYSTEM
+	source = None
+	message_id = errno
+	language_id = 0
+	result_buffer = ctypes.wintypes.LPWSTR()
+	buffer_size = 0
+	arguments = None
+	bytes = ctypes.windll.kernel32.FormatMessageW(
+		flags,
+		source,
+		message_id,
+		language_id,
+		ctypes.byref(result_buffer),
+		buffer_size,
+		arguments,
+	)
+	# note the following will cause an infinite loop if GetLastError
+	#  repeatedly returns an error that cannot be formatted, although
+	#  this should not happen.
+	handle_nonzero_success(bytes)
+	message = result_buffer.value
+	ctypes.windll.kernel32.LocalFree(result_buffer)
+	return message
+
+
+class WindowsError(builtins.WindowsError):
+	"""
+	More info about errors at
+	http://msdn.microsoft.com/en-us/library/ms681381(VS.85).aspx
+	"""
+
+	def __init__(self, value=None):
+		if value is None:
+			value = ctypes.windll.kernel32.GetLastError()
+		strerror = format_system_message(value)
+		if sys.version_info > (3, 3):
+			args = 0, strerror, None, value
+		else:
+			args = value, strerror
+		super(WindowsError, self).__init__(*args)
+
+	@property
+	def message(self):
+		return self.strerror
+
+	@property
+	def code(self):
+		return self.winerror
+
+	def __str__(self):
+		return self.message
+
+	def __repr__(self):
+		return '{self.__class__.__name__}({self.winerror})'.format(**vars())
+
+
+def handle_nonzero_success(result):
+	if result == 0:
+		raise WindowsError()