public void Revert(RevertPoint revertPoint)
{
CodeContract.Requires(m_revertPoints.Contains(revertPoint.Key), "revertPoint",
"The revert point is invalid");
Debug.Assert(revertPoint.Offset >= 0 && revertPoint.Offset < m_backupStreamBuilder.Length);
//seek backup stream reader
m_backupReader.Position = revertPoint.Offset;
//restore location state
m_lastLocation = revertPoint.LastLocation;
m_location = revertPoint.Location;
}
public RevertPoint CreateRevertPoint()
{
if (m_backupStreamBuilder == null)
{
CreateBackupStream();
}
int revertPointKey = GetRevertPointKey();
RevertPoint revertPoint = new RevertPoint(revertPointKey, m_backupReader.Position, m_lastLocation, m_location);
m_revertPoints.Add(revertPoint);
return(revertPoint);
}
public void RemoveRevertPoint(RevertPoint revertPoint)
{
m_revertPoints.Remove(revertPoint.Key);
}