internal static Exception GetIoExceptionForError(int error, string path = null)
{
// http://referencesource.microsoft.com/#mscorlib/system/io/__error.cs,142
string errorText = $"{NativeErrorHelper.LastErrorToString(error)} : '{path ?? XTaskStrings.NoValue}'";
switch (error)
{
case WinError.ERROR_FILE_NOT_FOUND:
return(new FileNotFoundException(errorText, path));
case WinError.ERROR_PATH_NOT_FOUND:
return(new DirectoryNotFoundException(errorText));
case WinError.ERROR_ACCESS_DENIED:
// Network access doesn't throw UnauthorizedAccess in .NET
case WinError.ERROR_NETWORK_ACCESS_DENIED:
return(new UnauthorizedAccessException(errorText));
case WinError.ERROR_FILENAME_EXCED_RANGE:
return(new PathTooLongException(errorText));
case WinError.ERROR_INVALID_DRIVE:
return(new DriveNotFoundException(errorText));
case WinError.ERROR_OPERATION_ABORTED:
return(new OperationCanceledException(errorText));
case WinError.ERROR_ALREADY_EXISTS:
case WinError.ERROR_SHARING_VIOLATION:
case WinError.ERROR_FILE_EXISTS:
default:
return(new IOException(errorText, NativeErrorHelper.GetHResultForWindowsError(error)));
}
}
/// <summary>
/// Try to get the error message for GetLastError result
/// </summary>
public static string LastErrorToString(int error)
{
return(String.Format(
CultureInfo.CurrentUICulture,
"Error {0}: {1}",
error,
NativeErrorHelper.FormatMessage(error)));
}
/// <summary>
/// Try to get the string for an HRESULT
/// </summary>
public static string HResultToString(int result)
{
string message;
if (HRESULT_FACILITY(result) == FACILITY_WIN32)
{
// Win32 Error, extract the code
message = NativeErrorHelper.FormatMessage(HRESULT_CODE(result));
}
else
{
// Hope that we get a rational IErrorInfo
Exception exception = Marshal.GetExceptionForHR(result);
message = exception.Message;
}
return(String.Format(
CultureInfo.CurrentUICulture,
"HRESULT {0:D} [0x{0:X}]: {1}",
result,
message));
}
/// <summary>
/// Set the attributes on the given path if possible.
/// </summary>
/// <remarks>
/// This is far greater perf than System.IO as it can skip all of the validation and normalization.
/// </remarks>
/// <exception cref="System.UnauthorizedAccessException">Thrown if the current user does not have rights to the specified path.</exception>
internal static bool TrySetFileAttributes(string path, FileAttributes attributes)
{
if (!Private.SetFileAttributesW(path, (uint)attributes))
{
int lastError = Marshal.GetLastWin32Error();
switch (lastError)
{
case WinError.ERROR_ACCESS_DENIED:
case WinError.ERROR_NETWORK_ACCESS_DENIED:
throw new UnauthorizedAccessException(String.Format(CultureInfo.InvariantCulture, "{0} : '{1}'", NativeErrorHelper.LastErrorToString(lastError), path));
}
return(false);
}
return(true);
}
private static FileAttributes TryGetFileAttributesPrivate(string path)
{
path = Paths.AddExtendedPrefix(path);
FileAttributes result = Private.GetFileAttributesW(path);
if (result == InvalidFileAttributes)
{
int error = Marshal.GetLastWin32Error();
switch (error)
{
case WinError.ERROR_ACCESS_DENIED:
case WinError.ERROR_NETWORK_ACCESS_DENIED:
throw new UnauthorizedAccessException(String.Format(CultureInfo.InvariantCulture, "{0} : '{1}'", NativeErrorHelper.LastErrorToString(error), path));
}
}
return(result);
}
