public void ViewIO()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
// Check positions are independant
tss.Position = 100;
Assert.AreEqual(0, altView.Position);
Assert.AreEqual(100, tss.Position);
// Check I/O is synchronous
byte[] buffer = new byte[200];
tss.WriteByte(99);
altView.Read(buffer, 0, 200);
Assert.AreEqual(99, buffer[100]);
// Check positions are updated correctly
Assert.AreEqual(200, altView.Position);
Assert.AreEqual(101, tss.Position);
}
/// <summary>
/// Discards the snapshot any changes made after the snapshot was taken are kept.
/// </summary>
public void ForgetSnapshot()
{
if (_diffStream == null)
{
throw new InvalidOperationException("No snapshot");
}
byte[] buffer = new byte[8192];
foreach (StreamExtent extent in _diffExtents)
{
_diffStream.Position = extent.Start;
_baseStream.Position = extent.Start;
int totalRead = 0;
while (totalRead < extent.Length)
{
int toRead = (int)Math.Min(extent.Length - totalRead, buffer.Length);
int read = _diffStream.Read(buffer, 0, toRead);
_baseStream.Write(buffer, 0, read);
totalRead += read;
}
}
_diffStream = null;
_diffExtents = null;
}
public Ntfs.NtfsFileSystem NtfsFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
return(Ntfs.NtfsFileSystem.Format(ms, "", diskGeometry, 0, diskGeometry.TotalSectorsLong));
}
private static DiscFileSystem FatFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
return(Fat.FatFileSystem.FormatFloppy(ms, FloppyDiskType.Extended, null));
}
public void CanWrite()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
Assert.AreEqual(true, tss.CanWrite);
memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.Read);
tss = new ThreadSafeStream(memStream);
Assert.AreEqual(false, tss.CanWrite);
}
public static DiscFileSystem DiagnosticNtfsFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
Ntfs.NtfsFileSystem.Format(ms, "", diskGeometry, 0, diskGeometry.TotalSectors);
var discFs = new DiscUtils.Diagnostics.ValidatingFileSystem<Ntfs.NtfsFileSystem, Ntfs.NtfsFileSystemChecker>(ms);
discFs.CheckpointInterval = 1;
discFs.GlobalIOTraceCapturesStackTraces = false;
return discFs;
}
public void CanRead()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
Assert.AreEqual(true, tss.CanRead);
memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.Write);
tss = new ThreadSafeStream(memStream);
Assert.AreEqual(false, tss.CanRead);
}
/// <summary>
/// Reverts to a previous snapshot, discarding any changes made to the stream.
/// </summary>
public void RevertToSnapshot()
{
if (_diffStream == null)
{
throw new InvalidOperationException("No snapshot");
}
_diffStream = null;
_diffExtents = null;
_position = _savedPosition;
}
/// <summary>
/// Takes a snapshot of the current stream contents.
/// </summary>
public void Snapshot()
{
if (_diffStream != null)
{
throw new InvalidOperationException("Already have a snapshot");
}
_savedPosition = _position;
_diffExtents = new List <StreamExtent>();
_diffStream = new SparseMemoryStream();
_diffStream.SetLength(_baseStream.Length);
}
public static DiscFileSystem DiagnosticNtfsFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
Ntfs.NtfsFileSystem.Format(ms, "", diskGeometry, 0, diskGeometry.TotalSectorsLong);
var discFs = new DiscUtils.Diagnostics.ValidatingFileSystem <Ntfs.NtfsFileSystem, Ntfs.NtfsFileSystemChecker>(ms);
discFs.CheckpointInterval = 1;
discFs.GlobalIOTraceCapturesStackTraces = false;
return(discFs);
}
public void Seek()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
tss.Seek(10, SeekOrigin.Begin);
Assert.AreEqual(10, tss.Position);
tss.Seek(10, SeekOrigin.Current);
Assert.AreEqual(20, tss.Position);
tss.Seek(-10, SeekOrigin.End);
Assert.AreEqual(1014, tss.Position);
}
public void ChangeLengthFails()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(2);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
Assert.AreEqual(2, tss.Length);
try
{
tss.SetLength(10);
Assert.Fail("SetLength should fail");
}
catch (NotSupportedException)
{
}
}
/// <summary>
/// Disposes of this instance.
/// </summary>
/// <param name="disposing"><c>true</c> if called from Dispose(), else <c>false</c></param>
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (_baseStreamOwnership == Ownership.Dispose && _baseStream != null)
{
_baseStream.Dispose();
}
_baseStream = null;
if (_diffStream != null)
{
_diffStream.Dispose();
}
_diffStream = null;
}
base.Dispose(disposing);
}
public void DisposeView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
altView.Dispose();
tss.ReadByte();
SparseStream altView2 = tss.OpenView();
altView2.ReadByte();
}
public void ChangeLengthFails()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(2);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
Assert.AreEqual(2, tss.Length);
try
{
tss.SetLength(10);
Assert.Fail("SetLength should fail");
}
catch (NotSupportedException)
{
}
}
public void Dispose_StopsView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
tss.Dispose();
try
{
altView.ReadByte();
Assert.Fail("Disposed stream didn't stop view");
}
catch (ObjectDisposedException)
{
}
}
public void Extents()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
tss.Position = 100;
tss.WriteByte(99);
List <StreamExtent> extents = new List <StreamExtent>(altView.Extents);
Assert.AreEqual(1, extents.Count);
Assert.AreEqual(100, extents[0].Start);
Assert.AreEqual(1, extents[0].Length);
extents = new List <StreamExtent>(altView.GetExtentsInRange(10, 300));
Assert.AreEqual(1, extents.Count);
Assert.AreEqual(100, extents[0].Start);
Assert.AreEqual(1, extents[0].Length);
}
/// <summary>
/// Takes a snapshot of the current stream contents.
/// </summary>
public void Snapshot()
{
if (_diffStream != null)
{
throw new InvalidOperationException("Already have a snapshot");
}
_savedPosition = _position;
_diffExtents = new List<StreamExtent>();
_diffStream = new SparseMemoryStream();
_diffStream.SetLength(_baseStream.Length);
}
public void ViewIO()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
// Check positions are independant
tss.Position = 100;
Assert.AreEqual(0, altView.Position);
Assert.AreEqual(100, tss.Position);
// Check I/O is synchronous
byte[] buffer = new byte[200];
tss.WriteByte(99);
altView.Read(buffer, 0, 200);
Assert.AreEqual(99, buffer[100]);
// Check positions are updated correctly
Assert.AreEqual(200, altView.Position);
Assert.AreEqual(101, tss.Position);
}
public void Seek()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
tss.Seek(10, SeekOrigin.Begin);
Assert.AreEqual(10, tss.Position);
tss.Seek(10, SeekOrigin.Current);
Assert.AreEqual(20, tss.Position);
tss.Seek(-10, SeekOrigin.End);
Assert.AreEqual(1014, tss.Position);
}
public void Extents()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
tss.Position = 100;
tss.WriteByte(99);
List<StreamExtent> extents = new List<StreamExtent>(altView.Extents);
Assert.AreEqual(1, extents.Count);
Assert.AreEqual(100, extents[0].Start);
Assert.AreEqual(1, extents[0].Length);
extents = new List<StreamExtent>(altView.GetExtentsInRange(10, 300));
Assert.AreEqual(1, extents.Count);
Assert.AreEqual(100, extents[0].Start);
Assert.AreEqual(1, extents[0].Length);
}
public void Dispose_StopsView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
tss.Dispose();
try
{
altView.ReadByte();
Assert.Fail("Disposed stream didn't stop view");
}
catch (ObjectDisposedException)
{
}
}
public Ntfs.NtfsFileSystem NtfsFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
return Ntfs.NtfsFileSystem.Format(ms, "", diskGeometry, 0, diskGeometry.TotalSectors);
}
private static DiscFileSystem FatFileSystem()
{
SparseMemoryBuffer buffer = new SparseMemoryBuffer(4096);
SparseMemoryStream ms = new SparseMemoryStream();
Geometry diskGeometry = Geometry.FromCapacity(30 * 1024 * 1024);
return Fat.FatFileSystem.FormatFloppy(ms, FloppyDiskType.Extended, null);
}
/// <summary>
/// Discards the snapshot any changes made after the snapshot was taken are kept.
/// </summary>
public void ForgetSnapshot()
{
if (_diffStream == null)
{
throw new InvalidOperationException("No snapshot");
}
byte[] buffer = new byte[8192];
foreach (var extent in _diffExtents)
{
_diffStream.Position = extent.Start;
_baseStream.Position = extent.Start;
int totalRead = 0;
while (totalRead < extent.Length)
{
int toRead = (int)Math.Min(extent.Length - totalRead, buffer.Length);
int read = _diffStream.Read(buffer, 0, toRead);
_baseStream.Write(buffer, 0, read);
totalRead += read;
}
}
_diffStream = null;
_diffExtents = null;
}
/// <summary>
/// Reverts to a previous snapshot, discarding any changes made to the stream.
/// </summary>
public void RevertToSnapshot()
{
if (_diffStream == null)
{
throw new InvalidOperationException("No snapshot");
}
_diffStream = null;
_diffExtents = null;
_position = _savedPosition;
}
public void DisposeView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
altView.Dispose();
tss.ReadByte();
SparseStream altView2 = tss.OpenView();
altView2.ReadByte();
}
/// <summary>
/// Disposes of this instance.
/// </summary>
/// <param name="disposing"><c>true</c> if called from Dispose(), else <c>false</c></param>
protected override void Dispose(bool disposing)
{
if (disposing)
{
if (_baseStreamOwnership == Ownership.Dispose && _baseStream != null)
{
_baseStream.Dispose();
}
_baseStream = null;
if (_diffStream != null)
{
_diffStream.Dispose();
}
_diffStream = null;
}
base.Dispose(disposing);
}
