public void Locations()
{
uint lfc = 2;
KukuTable ct = new KukuTable(
new KukuTableParameters
{
TableSize = (1 << 10) + 1,
StashSize = 4,
LocFuncCount = lfc,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 100,
EmptyItem = Item.MakeRandomItem()
}
);
for (ulong k = 0; k < 20; k++)
{
Item it = Item.MakeRandomItem();
HashSet <uint> allLocs = ct.AllLocations(it);
bool collisionFound = false;
for (uint i = 0; i < lfc; i++)
{
for (uint j = 0; j < i; j++)
{
collisionFound = collisionFound || (ct.Location(it, i) == ct.Location(it, j));
}
}
Assert.AreEqual(allLocs.Count < lfc, collisionFound);
}
}
public void Fill3()
{
KukuTable ct = new KukuTable(
new KukuTableParameters
{
TableSize = (1 << 10) + 1,
StashSize = 4,
LocFuncCount = 2,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 100,
EmptyItem = Item.MakeRandomItem()
}
);
List <Item> insertedItems = new List <Item>();
for (uint i = 0; i < 950; i++)
{
insertedItems.Add(Item.MakeRandomItem());
if (!ct.Insert(insertedItems[insertedItems.Count - 1]))
{
Item it = insertedItems.Find((Item it) => it.Equals(ct.LeftoverItem));
Assert.IsNotNull(it);
Assert.IsFalse(ct.Query(ct.LeftoverItem).Found);
insertedItems.Remove(it);
}
}
foreach (Item it in insertedItems)
{
Assert.IsTrue(ct.Query(it).Found);
}
Assert.IsFalse(ct.Query(Item.MakeRandomItem()).Found);
}
public void Fill2()
{
KukuTable ct = new KukuTable(
new KukuTableParameters
{
TableSize = (1 << 10) - 1,
StashSize = 0,
LocFuncCount = 4,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 100,
EmptyItem = Item.MakeRandomItem()
}
);
List <Item> insertedItems = new List <Item>();
for (uint i = 0; i < 600; i++)
{
insertedItems.Add(Item.MakeRandomItem());
Assert.IsTrue(ct.Insert(insertedItems[insertedItems.Count - 1]));
}
foreach (Item it in insertedItems)
{
Assert.IsTrue(ct.Query(it).Found);
}
Assert.IsFalse(ct.Query(Item.MakeRandomItem()).Found);
}
static void PrintTable(KukuTable kukuTable)
{
Console.WriteLine($"Table size: { kukuTable.Table.Size }");
Console.WriteLine($"{kukuTable.Table}");
Console.WriteLine($"Stash size: { kukuTable.Stash.Size }");
Console.WriteLine($"{kukuTable.Stash}");
}
public void CreateTest()
{
KukuTable table = null;
Utilities.AssertThrows <ArgumentException>(() => table = new KukuTable(
new KukuTableParameters
{
TableSize = 0,
StashSize = 0,
LocFuncCount = 2,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 1,
EmptyItem = Item.MakeZeroItem()
})
);
Utilities.AssertThrows <ArgumentException>(() => table = new KukuTable(
new KukuTableParameters
{
TableSize = 1,
StashSize = 0,
LocFuncCount = 0,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 1,
EmptyItem = Item.MakeZeroItem()
})
);
Utilities.AssertThrows <ArgumentException>(() => table = new KukuTable(
new KukuTableParameters
{
TableSize = 1,
StashSize = 0,
LocFuncCount = 1,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 1,
EmptyItem = Item.MakeZeroItem()
})
);
table = new KukuTable(
new KukuTableParameters
{
TableSize = Common.MinTableSize,
StashSize = 0,
LocFuncCount = 2,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 1,
EmptyItem = Item.MakeZeroItem()
}
);
}
public void Populate3()
{
KukuTable ct = new KukuTable(
new KukuTableParameters
{
TableSize = 1 << 10,
StashSize = 0,
LocFuncCount = 2,
LocFuncSeed = Item.MakeZeroItem(),
MaxProbe = 10,
EmptyItem = Item.MakeRandomItem()
}
);
for (uint i = 0; i < ct.TableSize; i++)
{
Assert.IsTrue(ct.IsEmpty(i));
}
Assert.IsTrue(ct.Insert(Item.MakeItem(0, 0)));
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));
// Fails
Assert.IsFalse(ct.Insert(Item.MakeItem(2, 2)));
int nonEmpties = 0;
for (uint i = 0; i < ct.TableSize; i++)
{
nonEmpties += ct.IsEmpty(i) ? 0 : 1;
}
Assert.AreEqual(5, nonEmpties);
Assert.IsTrue(ct.Query(Item.MakeItem(0, 0)).Found);
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);
}
public void Populate1()
{
KukuTable 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));
}
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)));
}
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}");
}
}
}
