/// <summary>
/// Initializes the source in order to obtain a random sequence.
/// </summary>
public void InitializeNonRepeatable()
{
// Get a random sequence Id (capped to the maximum number it can reach)
Random r = new Random();
int rndId = r.Next(maximumSequenceId + 1);
// Find out the effective numbers of values in the file
string filePath = Path.Combine(this.defaultPath, "RngSequence" + rndId.ToString());
long numbersCount = 0;
if (File.Exists(filePath))
{
using (FileStream stream = new FileStream(filePath, FileMode.Open))
{
numbersCount = stream.Length;
}
}
numbersCount /= sizeof(double);
if (numbersCount == 0)
{
// If there are no numbers in the file initialize the sequence from the start
InitializeRepeatable(rndId);
}
else
{
// Otherwise initialize it from a random position (valid for the given file)
double d = r.NextDouble();
long rndPosition = (long)(d * numbersCount);
QrngWebserviceRestorePoint rp = new QrngWebserviceRestorePoint(rndId, rndPosition);
Connect();
LoadState(rp);
}
}
/// <summary>
/// Restore the state of the source based on the given object.
/// </summary>
/// <param name="restorePoint">The restore point.</param>
public void LoadState(IRandomGeneratorRestorePoint restorePoint)
{
QrngWebserviceRestorePoint rp = restorePoint as QrngWebserviceRestorePoint;
if (rp == null)
{
return;
}
// If the data is still being loaded on the background thread wait for it to end
// and set it to null
if (this.loadingThread != null)
{
this.loadingThread.Join();
this.loadingThread = null;
}
// Set the starting Id and position
this.startingSequenceId = rp.SequenceId;
this.position = rp.Position;
// Calculate the state parameters
int unadjustedBlockNo = (int)(rp.Position / numbersPerBlock);
int sequenceOffset = this.currentBlock / (maximumNumbersPerFile / numbersPerBlock);
this.sequenceId = this.startingSequenceId + sequenceOffset;
this.currentBlock = unadjustedBlockNo % (maximumNumbersPerFile / numbersPerBlock);
this.currentIndex = (int)(this.position - (unadjustedBlockNo * numbersPerBlock));
// Load the buffers (the first synchronously, the second asynchronously)
LoadRngNumbers(this.currentBlock, 0);
this.currentBufferIndex = 0;
if (!double.IsNaN(this.buffers[0][0]))
{
DownloadBlockAsynchronous(1);
}
}
/// <summary>
/// Initializes the source in order to obtain a random sequence.
/// </summary>
public void InitializeNonRepeatable()
{
// Get a random sequence Id (capped to the maximum number it can reach)
Random r = new Random();
int rndId = r.Next(maximumSequenceId + 1);
// Find out the effective numbers of values in the file
string filePath = Path.Combine(this.defaultPath, "RngSequence" + rndId.ToString());
long numbersCount = 0;
if (File.Exists(filePath))
{
using (FileStream stream = new FileStream(filePath, FileMode.Open))
{
numbersCount = stream.Length;
}
}
numbersCount /= sizeof(double);
if (numbersCount == 0)
{
// If there are no numbers in the file initialize the sequence from the start
InitializeRepeatable(rndId);
}
else
{
// Otherwise initialize it from a random position (valid for the given file)
double d = r.NextDouble();
long rndPosition = (long)(d * numbersCount);
QrngWebserviceRestorePoint rp = new QrngWebserviceRestorePoint(rndId, rndPosition);
Connect();
LoadState(rp);
}
}
