protected CustomErasureMethod(SerializationInfo info, StreamingContext context)
{
Name = info.GetString("Name");
Guid = (Guid)info.GetValue("GUID", Guid.GetType());
RandomizePasses = info.GetBoolean("RandomizePasses");
List<PassData> passes = (List<PassData>)
info.GetValue("Passes", typeof(List<PassData>));
Passes = new ErasureMethodPass[passes.Count];
for (int i = 0; i != passes.Count; ++i)
Passes[i] = passes[i];
}
private ListViewItem AddPass(ErasureMethodPass pass)
{
ListViewItem item = new ListViewItem((passesLv.Items.Count + 1).ToString(
CultureInfo.CurrentCulture));
item.Tag = pass;
if (pass.Function == ErasureMethod.WriteRandom)
item.SubItems.Add(S._("Random Data"));
else
item.SubItems.Add(S._("Constant ({0} bytes)", ((byte[])pass.OpaqueValue).Length));
passesLv.Items.Add(item);
return item;
}
protected static ErasureMethodPass[] ShufflePasses(ErasureMethodPass[] passes)
{
ErasureMethodPass[] result = new ErasureMethodPass[passes.Length];
passes.CopyTo(result, 0);
Prng rand = PrngManager.GetInstance(ManagerLibrary.Settings.ActivePrng);
for (int i = 0; i < result.Length; ++i)
{
int val = rand.Next(result.Length - 1);
ErasureMethodPass tmpPass = result[val];
result[val] = result[i];
result[i] = tmpPass;
}
return result;
}
private void passesDuplicateBtn_Click(object sender, EventArgs e)
{
SavePass(currentPass);
foreach (ListViewItem item in passesLv.SelectedItems)
{
ErasureMethodPass oldPass = (ErasureMethodPass)item.Tag;
ErasureMethodPass pass = new ErasureMethodPass(
oldPass.Function, oldPass.OpaqueValue);
AddPass(pass);
}
}
private void passesAddBtn_Click(object sender, EventArgs e)
{
if (currentPass != null)
SavePass(currentPass);
ErasureMethodPass pass = new ErasureMethodPass(ErasureMethod.WriteRandom, null);
ListViewItem item = AddPass(pass);
if (passesLv.SelectedIndices.Count > 0)
{
item.Remove();
passesLv.Items.Insert(passesLv.SelectedIndices[passesLv.SelectedIndices.Count - 1] + 1,
item);
RenumberPasses();
}
}
public PassData(ErasureMethodPass pass)
{
if (pass.Function == ErasureMethod.WriteConstant)
{
Random = false;
OpaqueValue = pass.OpaqueValue;
}
else if (pass.Function == ErasureMethod.WriteRandom)
{
Random = true;
}
else
throw new ArgumentException(S._("The custom erasure method can only comprise " +
"passes containing constant or random passes"));
}