public BitString(BitString bits)
{
if (bits == null)
{
throw new ArgumentNullException(nameof(bits));
}
_length = bits._length;
_array = new long[(_length + 63) / 64];
_minPositiveWord = bits._minPositiveWord;
_maxPositiveWord = bits._maxPositiveWord;
if (_array.Length == 1)
{
_array[0] = bits._array[0];
}
else
{
Array.Copy(bits._array, _array, _array.Length);
}
}
public int GetLastCommonBitIndex(BitString other)
{
if (Length != other.Length)
{
throw new ArgumentException("Bit strings must have same size", nameof(other));
}
var from = Math.Max(_minPositiveWord, other._minPositiveWord);
var to = Math.Min(_maxPositiveWord, other._maxPositiveWord);
var otherArray = other._array;
for (var i = from; i <= to; i++)
{
var v1 = _array[i];
var v2 = otherArray[i];
var n = v1 & v2;
if (n != 0)
{
var bits1 = BitSetsIn16Bits[(int)(n & 0xffffu)];
var bits2 = BitSetsIn16Bits[(int)((n >> 16) & 0xffffu)];
var bits3 = BitSetsIn16Bits[(int)((n >> 32) & 0xffffu)];
var bits4 = BitSetsIn16Bits[(int)((n >> 48) & 0xffffu)];
if (bits4.Length > 0)
return bits4[bits4.Length - 1] + 48 + (int)i * 64;
if (bits3.Length > 0)
return bits3[bits3.Length - 1] + 32 + (int)i * 64;
if (bits2.Length > 0)
return bits2[bits2.Length - 1] + 16 + (int)i * 64;
return bits1[bits1.Length - 1] + (int)i * 64;
}
}
return -1;
}
public List<int> GetCommonIndices(BitString other)
{
if (Length != other.Length)
{
throw new ArgumentException("Bit strings must have same size", nameof(other));
}
var from = Math.Max(_minPositiveWord, other._minPositiveWord);
var to = Math.Min(_maxPositiveWord, other._maxPositiveWord);
var result = new List<int>();
var otherArray = other._array;
for (var i = from; i <= to; i++)
{
var v1 = _array[i];
var v2 = otherArray[i];
var n = v1 & v2;
if (n != 0)
{
var bits1 = BitSetsIn16Bits[(int)(n & 0xffffu)];
var bits2 = BitSetsIn16Bits[(int)((n >> 16) & 0xffffu)];
var bits3 = BitSetsIn16Bits[(int)((n >> 32) & 0xffffu)];
var bits4 = BitSetsIn16Bits[(int)((n >> 48) & 0xffffu)];
if (bits1.Length > 0)
result.Add(bits1[0] + (int)i * 64);
else if (bits2.Length > 0)
result.Add(bits2[0] + 16 + (int)i * 64);
else if (bits3.Length > 0)
result.Add(bits3[0] + 32 + (int)i * 64);
else
result.Add(bits4[0] + 48 + (int)i * 64);
}
}
return result;
}
public int CountCommonBits(BitString other)
{
if (Length != other.Length)
{
throw new ArgumentException("Bit strings must have same size", nameof(other));
}
var from = Math.Max(_minPositiveWord, other._minPositiveWord);
var to = Math.Min(_maxPositiveWord, other._maxPositiveWord);
var result = 0;
var otherArray = other._array;
for (var i = from; i <= to; i++)
{
var v1 = _array[i];
var v2 = otherArray[i];
var n = v1 & v2;
if (n != 0)
{
var bits1 = BitSetsIn16Bits[(int)(n & 0xffffu)];
var bits2 = BitSetsIn16Bits[(int)((n >> 16) & 0xffffu)];
var bits3 = BitSetsIn16Bits[(int)((n >> 32) & 0xffffu)];
var bits4 = BitSetsIn16Bits[(int)((n >> 48) & 0xffffu)];
result += bits1.Length + bits2.Length + bits3.Length + bits4.Length;
}
}
return result;
}
public bool HaveCommonBits(BitString other)
{
if (Length != other.Length)
{
throw new ArgumentException("Bit strings must have same size", nameof(other));
}
#if DEBUG
var sw = Stopwatch.StartNew();
#endif
var from = Math.Max(_minPositiveWord, other._minPositiveWord);
var to = Math.Min(_maxPositiveWord, other._maxPositiveWord);
var result = false;
#if DEBUG
var steps = 0;
#endif
var otherArray = other._array;
for (var i = from; i <= to; i++)
{
#if DEBUG
steps++;
#endif
var v1 = _array[i];
var v2 = otherArray[i];
if (v1 != 0 && v2 != 0 && ((v1 & v2) != 0))
{
result = true;
break;
}
}
#if DEBUG
if (sw.Elapsed.TotalMilliseconds > 0.1)
{
ConsoleHelpers.Debug("HCB -> Min: {0}, Max: {1}, Delta: {2}, Steps: {3}, Time: {4}", from, to, to - from, steps, sw.Elapsed.TotalMilliseconds);
}
#endif
return result;
}
public BitString Xor(BitString value)
{
EnsureArgumentIsValid(value);
var ints = (_length + 63) / 64;
for (long i = 0; i < ints; i++)
{
_array[i] ^= value._array[i];
RefreshBordersByWord(i);
}
//_version++;
return this;
}
public BitString Or(BitString value)
{
#if DEBUG
var sw = Stopwatch.StartNew();
#endif
EnsureArgumentIsValid(value);
var ints = (_length + 63) / 64;
for (long i = 0; i < ints; i++)
{
_array[i] |= value._array[i];
RefreshBordersByWord(i);
}
//_version++;
#if DEBUG
ConsoleHelpers.Debug("OR -> Len: {0}, Time: {1}", _array.Length, sw.Elapsed.TotalMilliseconds);
#endif
return this;
}
private void EnsureArgumentIsValid(BitString other)
{
if (other == null)
throw new ArgumentNullException();
if (other._length != _length)
throw new ArgumentException();
}