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99 lines
3.6 KiB
Python
99 lines
3.6 KiB
Python
5 years ago
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# Copyright (c) 2001-2007 Twisted Matrix Laboratories.
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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"""Error formatting function for Windows.
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The code is taken from twisted.python.win32 module.
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"""
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from __future__ import absolute_import
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import os
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__all__ = ['formatError']
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class _ErrorFormatter(object):
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"""
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Formatter for Windows error messages.
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@ivar winError: A callable which takes one integer error number argument
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and returns an L{exceptions.WindowsError} instance for that error (like
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L{ctypes.WinError}).
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@ivar formatMessage: A callable which takes one integer error number
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argument and returns a C{str} giving the message for that error (like
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L{win32api.FormatMessage}).
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@ivar errorTab: A mapping from integer error numbers to C{str} messages
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which correspond to those errors (like L{socket.errorTab}).
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"""
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def __init__(self, WinError, FormatMessage, errorTab):
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self.winError = WinError
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self.formatMessage = FormatMessage
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self.errorTab = errorTab
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@classmethod
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def fromEnvironment(cls):
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"""
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Get as many of the platform-specific error translation objects as
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possible and return an instance of C{cls} created with them.
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"""
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try:
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from ctypes import WinError
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except ImportError:
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WinError = None
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try:
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from win32api import FormatMessage
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except ImportError:
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FormatMessage = None
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try:
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from socket import errorTab
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except ImportError:
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errorTab = None
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return cls(WinError, FormatMessage, errorTab)
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def formatError(self, errorcode):
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"""
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Returns the string associated with a Windows error message, such as the
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ones found in socket.error.
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Attempts direct lookup against the win32 API via ctypes and then
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pywin32 if available), then in the error table in the socket module,
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then finally defaulting to C{os.strerror}.
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@param errorcode: the Windows error code
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@type errorcode: C{int}
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@return: The error message string
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@rtype: C{str}
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"""
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if self.winError is not None:
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return str(self.winError(errorcode))
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if self.formatMessage is not None:
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return self.formatMessage(errorcode)
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if self.errorTab is not None:
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result = self.errorTab.get(errorcode)
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if result is not None:
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return result
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return os.strerror(errorcode)
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formatError = _ErrorFormatter.fromEnvironment().formatError
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