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static private GetExceptionFromWin32Error ( int errorCode ) : |
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| errorCode | int | |
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/// <summary>
/// Creates the specified directory.
/// </summary>
/// <param name = "path">
/// A <see cref = "string" /> containing the path of the directory to create.
/// </param>
/// <exception cref = "ArgumentNullException">
/// <paramref name = "path" /> is <see langword = "null" />.
/// </exception>
/// <exception cref = "ArgumentException">
/// <paramref name = "path" /> is an empty string (""), contains only white
/// space, or contains one or more invalid characters as defined in
/// <see cref = "System.IO.Path.GetInvalidPathChars()" />.
/// <para>
/// -or-
/// </para>
/// <paramref name = "path" /> contains one or more components that exceed
/// the drive-defined maximum length. For example, on Windows-based
/// platforms, components must not exceed 255 characters.
/// </exception>
/// <exception cref = "PathTooLongException">
/// <paramref name = "path" /> exceeds the system-defined maximum length.
/// For example, on Windows-based platforms, paths must not exceed
/// 32,000 characters.
/// </exception>
/// <exception cref = "DirectoryNotFoundException">
/// <paramref name = "path" /> contains one or more directories that could not be
/// found.
/// </exception>
/// <exception cref = "UnauthorizedAccessException">
/// The caller does not have the required access permissions.
/// </exception>
/// <exception cref = "IOException">
/// <paramref name = "path" /> is a file.
/// <para>
/// -or-
/// </para>
/// <paramref name = "path" /> specifies a device that is not ready.
/// </exception>
/// <remarks>
/// Note: Unlike <see cref = "System.IO.Directory.CreateDirectory(System.String)" />, this method only creates
/// the last directory in <paramref name = "path" />.
/// </remarks>
public static void Create(Path path)
{
if (!NativeMethods.CreateDirectory(path.LongFullPath, IntPtr.Zero))
{
// To mimic Directory.CreateDirectory, we don't throw if the directory (not a file) already exists
var errorCode = Marshal.GetLastWin32Error();
if (errorCode != NativeMethods.ERROR_ALREADY_EXISTS || !Exists(path))
{
throw LongPathCommon.GetExceptionFromWin32Error(errorCode);
}
}
}
private static SafeFindHandle BeginFind(string normalizedPathWithSearchPattern,
out WIN32_FIND_DATA findData)
{
var handle = NativeMethods.FindFirstFile(normalizedPathWithSearchPattern, out findData);
if (handle.IsInvalid)
{
var errorCode = Marshal.GetLastWin32Error();
if (errorCode != NativeMethods.ERROR_FILE_NOT_FOUND)
{
throw LongPathCommon.GetExceptionFromWin32Error(errorCode);
}
return(null);
}
return(handle);
}
private static IEnumerable <Path> EnumerateFileSystemIterator(string normalizedPath, string normalizedSearchPattern,
bool includeDirectories, bool includeFiles)
{
// NOTE: Any exceptions thrown from this method are thrown on a call to IEnumerator<string>.MoveNext()
var path = LongPathCommon.RemoveLongPathPrefix(normalizedPath);
WIN32_FIND_DATA findData;
using (var handle = BeginFind(System.IO.Path.Combine(normalizedPath, normalizedSearchPattern), out findData))
{
if (handle == null)
{
yield break;
}
do
{
var currentFileName = findData.cFileName;
if (IsDirectory(findData.dwFileAttributes))
{
if (includeDirectories && !IsCurrentOrParentDirectory(currentFileName))
{
yield return(path.ToPath().Combine(currentFileName));
}
}
else
{
if (includeFiles)
{
yield return(path.ToPath().Combine(currentFileName));
}
}
} while (NativeMethods.FindNextFile(handle, out findData));
var errorCode = Marshal.GetLastWin32Error();
if (errorCode != NativeMethods.ERROR_NO_MORE_FILES)
{
throw LongPathCommon.GetExceptionFromWin32Error(errorCode);
}
}
}
private static IEnumerable <Path> EnumerateFileSystemEntries(Path path, string searchPattern,
bool includeDirectories, bool includeFiles)
{
var normalizedSearchPattern = LongPathCommon.NormalizeSearchPattern(searchPattern);
var normalizedPath = LongPathCommon.NormalizeLongPath(path.FullPath);
// First check whether the specified path refers to a directory and exists
FileAttributes attributes;
var errorCode = LongPathCommon.TryGetDirectoryAttributes(normalizedPath, out attributes);
if (errorCode != 0)
{
throw LongPathCommon.GetExceptionFromWin32Error(errorCode);
}
return(EnumerateFileSystemIterator(normalizedPath, normalizedSearchPattern,
includeDirectories,
includeFiles));
}
