public override MessageBundle PickPiece(PeerId id, BitField peerBitfield, List <PeerId> otherPeers, int count, int startIndex, int endIndex)
{
// Fast Path - the peer has nothing to offer
if (peerBitfield.AllFalse)
{
return(null);
}
if (files.Count == 1)
{
if (files[0].File.Priority == Priority.DoNotDownload)
{
return(null);
}
else
{
return(base.PickPiece(id, peerBitfield, otherPeers, count, startIndex, endIndex));
}
}
files.Sort();
// Fast Path - all the files have been set to DoNotDownload
if (files[0].File.Priority == Priority.DoNotDownload)
{
return(null);
}
// Fast Path - If all the files are the same priority, call straight into the base picker
if (files.TrueForAll(AllSamePriority))
{
return(base.PickPiece(id, peerBitfield, otherPeers, count, startIndex, endIndex));
}
temp.From(files[0].Selector);
for (int i = 1; i < files.Count && files[i].File.Priority != Priority.DoNotDownload; i++)
{
if (files[i].File.Priority != files[i - 1].File.Priority)
{
temp.And(peerBitfield);
if (!temp.AllFalse)
{
MessageBundle message = base.PickPiece(id, temp, otherPeers, count, startIndex, endIndex);
if (message != null)
{
return(message);
}
temp.SetAll(false);
}
}
temp.Or(files[i].Selector);
}
if (temp.AllFalse || temp.And(peerBitfield).AllFalse)
{
return(null);
}
return(base.PickPiece(id, temp, otherPeers, count, startIndex, endIndex));
}
/// <summary>
/// Performs a bitwise not operation on the (partially) known integer value.
/// </summary>
public virtual void Not()
{
Span <byte> bitsBuffer = stackalloc byte[Size];
Span <byte> maskBuffer = stackalloc byte[Size];
GetBits(bitsBuffer);
GetMask(maskBuffer);
var bits = new BitField(bitsBuffer);
var mask = new BitField(maskBuffer);
bits.Not();
bits.And(mask);
SetBits(bitsBuffer, maskBuffer);
}
public void And2()
{
var random = new Random();
var a = new byte [100];
var b = new byte [100];
random.NextBytes(a);
random.NextBytes(b);
for (var i = 0; i < a.Length * 8; i++)
{
var first = new BitField(a, i);
var second = new BitField(b, i);
first.And(second);
}
}
public void And2()
{
var r = new Random();
var a = new byte[100];
var b = new byte[100];
r.NextBytes(a);
r.NextBytes(b);
for (var i = 0; i < a.Length*8; i++)
{
var first = new BitField(a, i);
var second = new BitField(b, i);
first.And(second);
}
}
public void And()
{
var bf2 = new BitField(_secondValues);
_bf.And(bf2);
Assert.AreEqual(new BitField(_secondValues), bf2, "#1: bf2 should be unmodified");
for (var i = 0; i < _bf.Length; i++)
{
Assert.AreEqual(_initalValues[i] && _secondValues[i], _bf[i], "#2");
}
var count = _initalValues
.Where((x, i) => x && _secondValues[i])
.Count();
Assert.AreEqual(count, _bf.TrueCount, "#3");
}
public void And2()
{
Random r = new Random();
byte [] a = new byte [100];
byte [] b = new byte [100];
r.NextBytes(a);
r.NextBytes(b);
for (int i = 0; i < a.Length * 8; i++)
{
BitField first = new BitField(a, i);
BitField second = new BitField(b, i);
first.And(second);
}
}
public void And()
{
BitField bf2 = new BitField(secondValues);
bf.And(bf2);
Assert.AreEqual(new BitField(secondValues), bf2, "#1: bf2 should be unmodified");
for (int i = 0; i < bf.Length; i++)
{
Assert.AreEqual(initalValues[i] && secondValues[i], bf[i], "#2");
}
int count = 0;
for (int i = 0; i < initalValues.Length; i++)
{
if (initalValues[i] && secondValues[i])
{
count++;
}
}
Assert.AreEqual(count, bf.TrueCount, "#3");
}
public void And()
{
BitField bf2 = new BitField(secondValues);
bf.And(bf2);
Assert.Equal(new BitField(secondValues), bf2);
for (int i = 0; i < bf.Length; i++)
{
Assert.Equal(initalValues[i] && secondValues[i], bf[i]);
}
int count = 0;
for (int i = 0; i < initalValues.Length; i++)
{
if (initalValues[i] && secondValues[i])
{
count++;
}
}
Assert.Equal(count, bf.TrueCount);
}
public void And2 ()
{
Random r = new Random ();
byte [] a = new byte [100];
byte [] b = new byte [100];
r.NextBytes (a);
r.NextBytes (b);
for (int i = 0; i < a.Length * 8; i++) {
BitField first = new BitField (a, i);
BitField second = new BitField (b, i);
first.And (second);
}
}
public void Test()
{
var bitField = new BitField(0, false);
Assert.AreEqual(bitField.Length, 0);
Assert.AreEqual(bitField[1], false);
int size = Rand.Default.Range(1, 256);
bitField = new BitField(size, false);
BitArray bitArray = new BitArray(size, false);
check(bitField, bitArray);
size = Rand.Default.Range(1, 256);
bool[] boolData = new bool[size];
for (int i = 0; i < boolData.Length; i++)
{
boolData[i] = Rand.Default.Range(0, 2) > 0;
}
bitField = new BitField(boolData);
bitArray = new BitArray(boolData);
check(bitField, bitArray);
size = Rand.Default.Range(1, 64);
byte[] byteData = new byte[size];
for (int i = 0; i < byteData.Length; i++)
{
byteData[i] = Rand.Default.RandByte();
}
bitField = new BitField(byteData);
bitArray = new BitArray(byteData);
check(bitField, bitArray);
size = Rand.Default.Range(1, 32);
int[] intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
bitField = new BitField(intData);
bitArray = new BitArray(intData);
check(bitField, bitArray);
size = Rand.Default.Range(1, 32);
intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
bitArray = new BitArray(intData);
bitField = new BitField(bitArray);
check(bitField, bitArray);
size = Rand.Default.Range(1, 32);
intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
bitField = new BitField(intData);
bitField = new BitField(bitField);
bitArray = new BitArray(intData);
check(bitField, bitArray);
for (int i = 0; i < bitField.Length; i++)
{
bool value = Rand.Default.Range(0, 2) > 0;
bitField.Set(i, value);
bitArray.Set(i, value);
}
check(bitField, bitArray);
Assert.IsTrue(bitField.Any());
bitField.SetAll(false);
Assert.IsFalse(bitField.Any());
bitField.SetAll(true);
bitArray.SetAll(true);
check(bitField, bitArray);
size = Rand.Default.Range(1, 32);
intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
bitField = new BitField(intData);
bitArray = new BitArray(intData);
check(bitField, bitArray);
bitField = bitField.Not();
bitArray = bitArray.Not();
check(bitField, bitArray);
size = Rand.Default.Range(1, 32);
intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
bitField = new BitField(intData);
bitArray = new BitArray(intData);
check(bitField, bitArray);
intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
var bitFieldTwo = new BitField(intData);
var bitArrayTwo = new BitArray(intData);
check(bitFieldTwo, bitArrayTwo);
bitField = bitField.Or(bitFieldTwo);
bitArray = bitArray.Or(bitArrayTwo);
check(bitField, bitArray);
intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
bitFieldTwo = new BitField(intData);
bitArrayTwo = new BitArray(intData);
check(bitFieldTwo, bitArrayTwo);
bitField = bitField.Xor(bitFieldTwo);
bitArray = bitArray.Xor(bitArrayTwo);
check(bitField, bitArray);
intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
bitFieldTwo = new BitField(intData);
bitArrayTwo = new BitArray(intData);
check(bitFieldTwo, bitArrayTwo);
bitField = bitField.And(bitFieldTwo);
bitArray = bitArray.And(bitArrayTwo);
check(bitField, bitArray);
bitFieldTwo = bitField.Clone() as BitField;
Assert.IsNotNull(bitFieldTwo);
check(bitFieldTwo, bitArray);
size = Rand.Default.Range(1, 256);
boolData = new bool[size];
for (int i = 0; i < boolData.Length; i++)
{
boolData[i] = Rand.Default.Range(0, 2) > 0;
}
bitField = new BitField(boolData);
var boolDataTwo = new bool[size];
bitField.CopyTo(boolDataTwo, 0);
for (int i = 0; i < boolData.Length; i++)
{
Assert.AreEqual(boolData[i], boolDataTwo[i]);
}
size = Rand.Default.Range(1, 64);
byteData = new byte[size];
for (int i = 0; i < byteData.Length; i++)
{
byteData[i] = Rand.Default.RandByte();
}
bitField = new BitField(byteData);
var byteDataTwo = new byte[size];
bitField.CopyTo(byteDataTwo, 0);
for (int i = 0; i < byteData.Length; i++)
{
Assert.AreEqual(byteData[i], byteDataTwo[i]);
}
size = Rand.Default.Range(1, 32);
intData = new int[size];
for (int i = 0; i < intData.Length; i++)
{
intData[i] = Rand.Default.RandInt();
}
bitField = new BitField(intData);
var intDataTwo = new int[size];
bitField.CopyTo(intDataTwo, 0);
for (int i = 0; i < intData.Length; i++)
{
Assert.AreEqual(intData[i], intDataTwo[i]);
}
}
