/// <summary>
/// Creates a new <c>LazyCopy</c> file.
/// </summary>
/// <param name="path">Path to the reparse point to get data from.</param>
/// <param name="fileData">Reparse file data to be set for the <paramref name="path"/>.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="path"/> is <see langword="null"/> or empty.
/// <para>-or-</para>
/// <paramref name="fileData"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="fileData"/> contains <see langword="null"/> or empty file path.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="fileData"/> contains negative file size.</exception>
/// <exception cref="IOException">File cannot be created.</exception>
/// <exception cref="InvalidOperationException">Reparse point data cannot be set.</exception>
public static void CreateLazyCopyFile(string path, LazyCopyFileData fileData)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(nameof(path));
}
if (fileData == null)
{
throw new ArgumentNullException(nameof(fileData));
}
if (string.IsNullOrEmpty(fileData.RemotePath))
{
throw new ArgumentNullException(nameof(fileData));
}
if (fileData.FileSize < 0)
{
throw new ArgumentOutOfRangeException(nameof(fileData), fileData.FileSize, "File size is negative.");
}
string normalizedPath = LongPathCommon.NormalizePath(path);
LongPathFileInfo fileInfo = new LongPathFileInfo(normalizedPath);
bool shouldCreateFile = false;
if (!fileInfo.Exists || fileInfo.Length > 0)
{
LongPathDirectory.CreateDirectory(fileInfo.DirectoryName);
shouldCreateFile = true;
}
else if (!fileInfo.Attributes.HasFlag(FileAttributes.ReparsePoint))
{
shouldCreateFile = true;
}
else if (fileInfo.Attributes.HasFlag(FileAttributes.ReadOnly))
{
fileInfo.Attributes &= ~FileAttributes.ReadOnly;
}
if (shouldCreateFile)
{
using (fileInfo.Create())
{
// Do nothing.
}
}
// If the original file is empty, we don't need to set a reparse point for it.
if (fileData.FileSize == 0)
{
return;
}
ReparsePointHelper.SetReparsePointData(
path,
new object[] // Custom serialization layout for the LazyCopyFileData object.
{
(long)(fileData.UseCustomHandler ? 1L : 0L),
(long)fileData.FileSize,
// Add the prefix, if the custom handling is needed for the file.
Encoding.Unicode.GetBytes(
(fileData.UseCustomHandler ? fileData.RemotePath : PathHelper.ChangeDriveLetterToDeviceName(fileData.RemotePath))
+ '\0')
},
LazyCopyFileHelper.LazyCopyReparseTag,
LazyCopyFileHelper.LazyCopyReparseGuid);
// Set the proper file attributes.
LongPathCommon.SetAttributes(path, FileAttributes.ReparsePoint | FileAttributes.NotContentIndexed | FileAttributes.Offline);
}
/// <summary>
/// Creates a new <c>LazyCopy</c> file.
/// </summary>
/// <param name="path">Path to the reparse point to get data from.</param>
/// <param name="fileData">Reparse file data to be set for the <paramref name="path"/>.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="path"/> is <see langword="null"/> or empty.
/// <para>-or-</para>
/// <paramref name="fileData"/> is <see langword="null"/>.
/// <para>-or-</para>
/// <paramref name="fileData"/> contains <see langword="null"/> or empty file path.
/// </exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="fileData"/> contains negative file size.</exception>
/// <exception cref="IOException">File cannot be created.</exception>
/// <exception cref="InvalidOperationException">Reparse point data cannot be set.</exception>
public static void CreateLazyCopyFile(string path, LazyCopyFileData fileData)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(nameof(path));
}
if (fileData == null)
{
throw new ArgumentNullException(nameof(fileData));
}
if (string.IsNullOrEmpty(fileData.RemotePath))
{
throw new ArgumentNullException(nameof(fileData));
}
if (fileData.FileSize < 0)
{
throw new ArgumentOutOfRangeException(nameof(fileData), fileData.FileSize, "File size is negative.");
}
string normalizedPath = LongPathCommon.NormalizePath(path);
LongPathFileInfo fileInfo = new LongPathFileInfo(normalizedPath);
bool shouldCreateFile = false;
if (!fileInfo.Exists || fileInfo.Length > 0)
{
LongPathDirectory.CreateDirectory(fileInfo.DirectoryName);
shouldCreateFile = true;
}
else if (!fileInfo.Attributes.HasFlag(FileAttributes.ReparsePoint))
{
shouldCreateFile = true;
}
else if (fileInfo.Attributes.HasFlag(FileAttributes.ReadOnly))
{
fileInfo.Attributes &= ~FileAttributes.ReadOnly;
}
if (shouldCreateFile)
{
using (fileInfo.Create())
{
// Do nothing.
}
}
// If the original file is empty, we don't need to set a reparse point for it.
if (fileData.FileSize == 0)
{
return;
}
ReparsePointHelper.SetReparsePointData(
path,
new object[] // Custom serialization layout for the LazyCopyFileData object.
{
(long)(fileData.UseCustomHandler ? 1L : 0L),
(long)fileData.FileSize,
// Add the prefix, if the custom handling is needed for the file.
Encoding.Unicode.GetBytes(
(fileData.UseCustomHandler ? fileData.RemotePath : PathHelper.ChangeDriveLetterToDeviceName(fileData.RemotePath))
+ '\0')
},
LazyCopyFileHelper.LazyCopyReparseTag,
LazyCopyFileHelper.LazyCopyReparseGuid);
// Set the proper file attributes.
LongPathCommon.SetAttributes(path, FileAttributes.ReparsePoint | FileAttributes.NotContentIndexed | FileAttributes.Offline);
}
