/// <summary>
/// Beendet alle Aktivitäten dieses Zugriffsmoduls.
/// </summary>
protected override void OnDispose()
{
// Forward - will stop the feed
base.OnDispose();
// Finished with the file
using (m_Stream)
m_Stream = null;
}
/// <summary>
/// Erzeugt eine neue Zugriffsinstanz.
/// </summary>
/// <param name="stream">Die Verwaltung eines Datenstroms.</param>
/// <exception cref="ArgumentNullException">Es wurde kein Datenstrom angegeben.</exception>
public FileAccessor(IVirtualStream stream)
{
// Validate
if (stream == null)
{
throw new ArgumentNullException("stream");
}
// Remember
m_Stream = stream;
// Must be called periodically
SetExternalFeed(false);
}
/// <summary>
/// Überprüft den Inhalt der zusammengesetzten Datei.
/// </summary>
/// <param name="stream">Die zusammengesetzte Datei.</param>
/// <param name="position">Optional eine neue Position in der Datei.</param>
/// <param name="data">Die erwarteten Daten.</param>
/// <param name="offset">Die erste Position in den erwarteten Daten.</param>
/// <param name="count">Die Anzahl der zu überprüfenden Bytes.</param>
private static void Validate(IVirtualStream stream, long?position, byte[] data, int offset, int count)
{
// Report
Console.WriteLine("Validate({0}, {1}, {2})", position, offset, count);
// Move position
if (position.HasValue)
{
stream.Position = position.Value;
}
// Load position
long initialPosition = stream.Position;
// Validate
if (position.HasValue)
{
Assert.AreEqual(position.Value, initialPosition, "Initital Position");
}
// Random shift
byte[] shift = Enumerable.Range(0, Generator.Next(100)).Select(i => (byte)Generator.Next(256)).ToArray();
// Allocate read buffer
byte[] read = new byte[shift.Length + count];
// Fill
Array.Copy(shift, read, shift.Length);
// Process the read
Assert.AreEqual(count, stream.Read(read, shift.Length, count));
// Validate
Assert.AreEqual(initialPosition + count, stream.Position, "Final Position");
// Validate random pattern
for (int i = shift.Length; i-- > 0;)
{
Assert.AreEqual(shift[i], read[i], "Guard at {0}", i);
}
// Real data
for (int i = count; i-- > 0;)
{
Assert.AreEqual(data[i + offset], read[i + shift.Length], "Data at {0}", i);
}
}
/// <summary>
/// Ändert den abzuspielenden Datenstrom.
/// </summary>
/// <param name="stream">Der gewünschte neue Datenstrom.</param>
/// <exception cref="ArgumentNullException">Es wurde kein Datenstrom angegeben.</exception>
public void ChangeStream(IVirtualStream stream)
{
// Validate
if (stream == null)
{
throw new ArgumentNullException("stream");
}
// Change
var oldStream = Interlocked.Exchange(ref m_Stream, stream);
// Release
if (oldStream != null)
{
lock (oldStream)
oldStream.Dispose();
}
}
/// <summary>
/// Überprüft den Inhalt der zusammengesetzten Datei.
/// </summary>
/// <param name="stream">Die zusammengesetzte Datei.</param>
/// <param name="position">Optional eine neue Position in der Datei.</param>
/// <param name="data">Die erwarteten Daten.</param>
/// <param name="offset">Die erste Position in den erwarteten Daten.</param>
/// <param name="count">Die Anzahl der zu überprüfenden Bytes.</param>
private static void Validate( IVirtualStream stream, long? position, byte[] data, int offset, int count )
{
// Report
Console.WriteLine( "Validate({0}, {1}, {2})", position, offset, count );
// Move position
if (position.HasValue)
stream.Position = position.Value;
// Load position
long initialPosition = stream.Position;
// Validate
if (position.HasValue)
Assert.AreEqual( position.Value, initialPosition, "Initital Position" );
// Random shift
byte[] shift = Enumerable.Range( 0, Generator.Next( 100 ) ).Select( i => (byte) Generator.Next( 256 ) ).ToArray();
// Allocate read buffer
byte[] read = new byte[shift.Length + count];
// Fill
Array.Copy( shift, read, shift.Length );
// Process the read
Assert.AreEqual( count, stream.Read( read, shift.Length, count ) );
// Validate
Assert.AreEqual( initialPosition + count, stream.Position, "Final Position" );
// Validate random pattern
for (int i = shift.Length; i-- > 0; )
Assert.AreEqual( shift[i], read[i], "Guard at {0}", i );
// Real data
for (int i = count; i-- > 0; )
Assert.AreEqual( data[i + offset], read[i + shift.Length], "Data at {0}", i );
}
/// <summary>
/// Beendet alle Aktivitäten dieses Zugriffsmoduls.
/// </summary>
protected override void OnDispose()
{
// Forward - will stop the feed
base.OnDispose();
// Finished with the file
using (m_Stream)
m_Stream = null;
}
/// <summary>
/// Ändert den abzuspielenden Datenstrom.
/// </summary>
/// <param name="stream">Der gewünschte neue Datenstrom.</param>
/// <exception cref="ArgumentNullException">Es wurde kein Datenstrom angegeben.</exception>
public void ChangeStream( IVirtualStream stream )
{
// Validate
if (stream == null)
throw new ArgumentNullException( "stream" );
// Change
var oldStream = Interlocked.Exchange( ref m_Stream, stream );
// Release
if (oldStream != null)
lock (oldStream)
oldStream.Dispose();
}
/// <summary>
/// Erzeugt eine neue Zugriffsinstanz.
/// </summary>
/// <param name="stream">Die Verwaltung eines Datenstroms.</param>
/// <exception cref="ArgumentNullException">Es wurde kein Datenstrom angegeben.</exception>
public FileAccessor( IVirtualStream stream )
{
// Validate
if (stream == null)
throw new ArgumentNullException( "stream" );
// Remember
m_Stream = stream;
// Must be called periodically
SetExternalFeed( false );
}
