public void RepeatedInsert()
{
KukuTable ct = new KukuTable(
new KukuTableParameters
{
TableSize = 1 << 10,
StashSize = 0,
LocFuncCount = 4,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 10,
EmptyItem = Item.MakeZeroItem()
}
);
Assert.IsTrue(ct.Insert(Item.MakeItem(1, 0)));
Assert.IsTrue(ct.Insert(Item.MakeItem(0, 1)));
Assert.IsTrue(ct.Insert(Item.MakeItem(1, 1)));
Assert.IsTrue(ct.Insert(Item.MakeItem(2, 2)));
Assert.IsFalse(ct.Insert(Item.MakeItem(1, 0)));
Assert.IsFalse(ct.Insert(Item.MakeItem(0, 1)));
Assert.IsFalse(ct.Insert(Item.MakeItem(1, 1)));
Assert.IsFalse(ct.Insert(Item.MakeItem(2, 2)));
}
public void Populate2()
{
KukuTable ct = new KukuTable(
new KukuTableParameters
{
TableSize = 1 << 10,
StashSize = 0,
LocFuncCount = 2,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 10,
EmptyItem = Item.MakeZeroItem()
}
);
for (uint i = 0; i < ct.TableSize; i++)
{
Assert.IsTrue(ct.IsEmpty(i));
}
Assert.IsTrue(ct.Insert(Item.MakeItem(1, 0)));
Assert.IsTrue(ct.Insert(Item.MakeItem(0, 1)));
Assert.IsTrue(ct.Insert(Item.MakeItem(1, 1)));
Assert.IsTrue(ct.Insert(Item.MakeItem(2, 2)));
Utilities.AssertThrows <ArgumentException>(() => ct.Insert(ct.EmptyItem));
Utilities.AssertThrows <ArgumentException>(() => ct.Insert(Item.MakeZeroItem()));
int nonEmpties = 0;
for (uint i = 0; i < ct.TableSize; i++)
{
nonEmpties += ct.IsEmpty(i) ? 0 : 1;
}
Assert.AreEqual(4, nonEmpties);
Assert.IsTrue(ct.Query(Item.MakeItem(1, 0)).Found);
Assert.IsTrue(ct.Query(Item.MakeItem(0, 1)).Found);
Assert.IsTrue(ct.Query(Item.MakeItem(1, 1)).Found);
Assert.IsTrue(ct.Query(Item.MakeItem(2, 2)).Found);
Assert.IsFalse(ct.Query(Item.MakeItem(3, 3)).Found);
}
static void RunExample(KukuTableParameters parameters)
{
var kukuTable = new KukuTable(parameters);
ulong roundCounter = 0;
while (true)
{
Console.WriteLine($"Inserted {roundCounter * 20} items.");
Console.WriteLine($"Fill rate: {kukuTable.FillRate}.");
Console.ReadKey();
for (ulong i = 0; i < 20; i++)
{
var item = Item.MakeItem(i + 1, roundCounter + 1);
if (!kukuTable.Insert(item))
{
Console.WriteLine($"Insertion failed: round_counter = {roundCounter}, i = {i}");
Console.WriteLine($"Inserted successfully {roundCounter * 20 + i} items.");
Console.WriteLine($"Fill rate: {kukuTable.FillRate}.");
var lastItem = kukuTable.LeftoverItem;
Console.WriteLine($"Leftover item: [{string.Join(',', lastItem)}].");
break;
}
}
PrintTable(kukuTable);
if (!kukuTable.IsEmptyItem(kukuTable.LeftoverItem))
{
break;
}
roundCounter++;
}
while (true)
{
Console.WriteLine("Query item: ");
var input = Console.ReadLine();
Item item;
try
{
if (input == null)
{
continue;
}
var data = input.Split(",").Select(ulong.Parse).ToArray();
item = Item.MakeItem(data[0], data[1]);
}
catch
{
Console.WriteLine($"Incorrect format. Expected: <ulong>,<ulong>");
continue;
}
var result = kukuTable.Query(item);
Console.WriteLine($"Found: {result.Found}");
if (result.Found)
{
Console.WriteLine($"Location: {result.Location}");
Console.WriteLine($"In stash: {result.InStash}");
Console.WriteLine($"Hash function index: {result.LocFuncIndex}");
}
}
}
public void Populate1()
{
KukuTable ct = new KukuTable(
new KukuTableParameters
{
TableSize = 1,
StashSize = 0,
LocFuncCount = 1,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 10,
EmptyItem = Item.MakeZeroItem()
}
);
Assert.IsTrue(ct.IsEmptyItem(ct[0]));
Assert.IsTrue(ct.Insert(Item.MakeItem(1, 0)));
Assert.IsFalse(ct.Insert(Item.MakeItem(0, 1)));
Utilities.AssertThrows <ArgumentException>(() => ct.Insert(ct.EmptyItem));
Utilities.AssertThrows <ArgumentException>(() => ct.Insert(Item.MakeZeroItem()));
Assert.IsFalse(ct.IsEmpty(0));
ct = new KukuTable(
new KukuTableParameters
{
TableSize = 1,
StashSize = 0,
LocFuncCount = 2,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 10,
EmptyItem = Item.MakeZeroItem()
}
);
Assert.IsTrue(ct.IsEmptyItem(ct[0]));
Assert.IsTrue(ct.Insert(Item.MakeItem(1, 0)));
Assert.IsFalse(ct.Insert(Item.MakeItem(0, 1)));
Utilities.AssertThrows <ArgumentException>(() => ct.Insert(ct.EmptyItem));
Utilities.AssertThrows <ArgumentException>(() => ct.Insert(Item.MakeZeroItem()));
Assert.IsFalse(ct.IsEmpty(0));
ct = new KukuTable(
new KukuTableParameters
{
TableSize = 2,
StashSize = 0,
LocFuncCount = 1,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 10,
EmptyItem = Item.MakeZeroItem()
}
);
Assert.IsTrue(ct.IsEmptyItem(ct[0]));
Assert.IsTrue(ct.Insert(Item.MakeItem(1, 0)));
// Collision
Assert.IsFalse(ct.Insert(Item.MakeItem(0, 1)));
// No collision
Assert.IsTrue(ct.Insert(Item.MakeItem(0, 2)));
Assert.IsFalse(ct.IsEmpty(0));
Assert.IsFalse(ct.IsEmpty(1));
}