public void Collections_BitSetOperationsWithEmptyInputTest()
{
var bs_empty = new BitSet();
var bits = new bool[] { false, false, true, };
var bs = new BitSet(bits);
void bs_verify_unchanged_func()
{
Assert.AreEqual(1, bs.Cardinality);
Assert.AreEqual(2, bs.CardinalityZeros);
Assert.AreEqual(bs[0], false);
Assert.AreEqual(bs[1], false);
Assert.AreEqual(bs[2], true);
}
bs.Or(bs_empty);
bs_verify_unchanged_func();
bs.AndNot(bs_empty);
bs_verify_unchanged_func();
bs.And(bs_empty);
bs_verify_unchanged_func();
bs.Xor(bs_empty);
bs_verify_unchanged_func();
}
public void Collections_BitSetOperationsTest()
{
var lhs_bits = new bool[] { false, false, true, };
var lhs_bs = new BitSet(lhs_bits);
// rhs is our operation input, and it needs to be longer than lhs to also validate
// ClearAlignmentOnlyBitsForBitOperation's logic is working as intended
var rhs_bits = new bool[] { false, true, false, true, };
var rhs_bs = new BitSet(rhs_bits);
lhs_bs.Or(rhs_bs);
Assert.AreEqual(2, lhs_bs.Cardinality);
Assert.AreEqual(1, lhs_bs.CardinalityZeros);
Assert.AreEqual(lhs_bs[0], false);
Assert.AreEqual(lhs_bs[1], true);
Assert.AreEqual(lhs_bs[2], true);
// also undoes the OR operation
lhs_bs.AndNot(rhs_bs);
Assert.AreEqual(1, lhs_bs.Cardinality);
Assert.AreEqual(2, lhs_bs.CardinalityZeros);
Assert.AreEqual(lhs_bs[0], false);
Assert.AreEqual(lhs_bs[1], false);
Assert.AreEqual(lhs_bs[2], true);
lhs_bs.And(rhs_bs);
Assert.AreEqual(0, lhs_bs.Cardinality);
Assert.AreEqual(3, lhs_bs.CardinalityZeros);
Assert.AreEqual(lhs_bs[0], false);
Assert.AreEqual(lhs_bs[1], false);
Assert.AreEqual(lhs_bs[2], false);
// at this point lhs is zero, and the only bit in rhs which is on (relative to lhs's bit-space) is the 2nd
lhs_bs.Xor(rhs_bs);
Assert.AreEqual(1, lhs_bs.Cardinality);
Assert.AreEqual(2, lhs_bs.CardinalityZeros);
Assert.AreEqual(lhs_bs[0], false);
Assert.AreEqual(lhs_bs[1], true);
Assert.AreEqual(lhs_bs[2], false);
lhs_bs.Not();
Assert.AreEqual(2, lhs_bs.Cardinality);
Assert.AreEqual(1, lhs_bs.CardinalityZeros);
Assert.AreEqual(lhs_bs[0], true);
Assert.AreEqual(lhs_bs[1], false);
Assert.AreEqual(lhs_bs[2], true);
}
internal virtual void DoRandomSets(int maxSize, int iter, int mode)
{
BitSet a0 = null;
OpenBitSet b0 = null;
for (int i = 0; i < iter; i++)
{
int sz = Random.Next(maxSize);
BitSet a = new BitSet(sz);
OpenBitSet b = new OpenBitSet(sz);
// test the various ways of setting bits
if (sz > 0)
{
int nOper = Random.Next(sz);
for (int j = 0; j < nOper; j++)
{
int idx;
idx = Random.Next(sz);
a.Set(idx, true);
b.FastSet(idx);
idx = Random.Next(sz);
a.Set(idx, true);
b.FastSet((long)idx);
idx = Random.Next(sz);
a.Set(idx, false);
b.FastClear(idx);
idx = Random.Next(sz);
a.Set(idx, false);
b.FastClear((long)idx);
idx = Random.Next(sz);
a.Set(idx, !a.Get(idx));
b.FastFlip(idx);
bool val = b.FlipAndGet(idx);
bool val2 = b.FlipAndGet(idx);
Assert.IsTrue(val != val2);
idx = Random.Next(sz);
a.Set(idx, !a.Get(idx));
b.FastFlip((long)idx);
val = b.FlipAndGet((long)idx);
val2 = b.FlipAndGet((long)idx);
Assert.IsTrue(val != val2);
val = b.GetAndSet(idx);
Assert.IsTrue(val2 == val);
Assert.IsTrue(b.Get(idx));
if (!val)
{
b.FastClear(idx);
}
Assert.IsTrue(b.Get(idx) == val);
}
}
// test that the various ways of accessing the bits are equivalent
DoGet(a, b);
DoGetFast(a, b, sz);
// test ranges, including possible extension
int fromIndex, toIndex;
fromIndex = Random.Next(sz + 80);
toIndex = fromIndex + Random.Next((sz >> 1) + 1);
BitSet aa = (BitSet)a.Clone();
aa.Flip(fromIndex, toIndex);
OpenBitSet bb = (OpenBitSet)b.Clone();
bb.Flip(fromIndex, toIndex);
DoIterate(aa, bb, mode); // a problem here is from flip or doIterate
fromIndex = Random.Next(sz + 80);
toIndex = fromIndex + Random.Next((sz >> 1) + 1);
aa = (BitSet)a.Clone();
aa.Clear(fromIndex, toIndex);
bb = (OpenBitSet)b.Clone();
bb.Clear(fromIndex, toIndex);
DoNextSetBit(aa, bb); // a problem here is from clear() or nextSetBit
DoNextSetBitLong(aa, bb);
DoPrevSetBit(aa, bb);
DoPrevSetBitLong(aa, bb);
fromIndex = Random.Next(sz + 80);
toIndex = fromIndex + Random.Next((sz >> 1) + 1);
aa = (BitSet)a.Clone();
aa.Set(fromIndex, toIndex);
bb = (OpenBitSet)b.Clone();
bb.Set(fromIndex, toIndex);
DoNextSetBit(aa, bb); // a problem here is from set() or nextSetBit
DoNextSetBitLong(aa, bb);
DoPrevSetBit(aa, bb);
DoPrevSetBitLong(aa, bb);
if (a0 != null)
{
Assert.AreEqual(a.Equals(a0), b.Equals(b0));
Assert.AreEqual(a.Cardinality, b.Cardinality);
BitSet a_and = (BitSet)a.Clone();
a_and.And(a0);
BitSet a_or = (BitSet)a.Clone();
a_or.Or(a0);
BitSet a_xor = (BitSet)a.Clone();
a_xor.Xor(a0);
BitSet a_andn = (BitSet)a.Clone();
a_andn.AndNot(a0);
OpenBitSet b_and = (OpenBitSet)b.Clone();
Assert.AreEqual(b, b_and);
b_and.And(b0);
OpenBitSet b_or = (OpenBitSet)b.Clone();
b_or.Or(b0);
OpenBitSet b_xor = (OpenBitSet)b.Clone();
b_xor.Xor(b0);
OpenBitSet b_andn = (OpenBitSet)b.Clone();
b_andn.AndNot(b0);
DoIterate(a_and, b_and, mode);
DoIterate(a_or, b_or, mode);
DoIterate(a_xor, b_xor, mode);
DoIterate(a_andn, b_andn, mode);
Assert.AreEqual(a_and.Cardinality, b_and.Cardinality);
Assert.AreEqual(a_or.Cardinality, b_or.Cardinality);
Assert.AreEqual(a_xor.Cardinality, b_xor.Cardinality);
Assert.AreEqual(a_andn.Cardinality, b_andn.Cardinality);
// test non-mutating popcounts
Assert.AreEqual(b_and.Cardinality, OpenBitSet.IntersectionCount(b, b0));
Assert.AreEqual(b_or.Cardinality, OpenBitSet.UnionCount(b, b0));
Assert.AreEqual(b_xor.Cardinality, OpenBitSet.XorCount(b, b0));
Assert.AreEqual(b_andn.Cardinality, OpenBitSet.AndNotCount(b, b0));
}
a0 = a;
b0 = b;
}
}
/*
* The difference between add(AbstractCharClass) and union(AbstractCharClass)
* is that add() is used for constructions like "[^abc\\d]"
* (this pattern doesn't match "1")
* while union is used for constructions like "[^abc[\\d]]"
* (this pattern matches "1").
*/
public CharClass Add(AbstractCharClass cc_0)
{
if (!mayContainSupplCodepoints && cc_0.mayContainSupplCodepoints)
{
mayContainSupplCodepoints = true;
}
if (!invertedSurrogates)
{
//A | !B = ! ((A ^ B) & B)
if (cc_0.altSurrogates)
{
lowHighSurrogates.Xor(cc_0.GetLowHighSurrogates());
lowHighSurrogates.And(cc_0.GetLowHighSurrogates());
altSurrogates = !altSurrogates;
invertedSurrogates = true;
//A | B
}
else
{
lowHighSurrogates.Or(cc_0.GetLowHighSurrogates());
}
}
else
{
//!A | !B = !(A & B)
if (cc_0.altSurrogates)
{
lowHighSurrogates.And(cc_0.GetLowHighSurrogates());
//!A | B = !(A & !B)
}
else
{
lowHighSurrogates.AndNot(cc_0.GetLowHighSurrogates());
}
}
if (!hideBits && cc_0.GetBits() != null)
{
if (!inverted)
{
//A | !B = ! ((A ^ B) & B)
if (cc_0.IsNegative())
{
bits.Xor(cc_0.GetBits());
bits.And(cc_0.GetBits());
alt = !alt;
inverted = true;
//A | B
}
else
{
bits.Or(cc_0.GetBits());
}
}
else
{
//!A | !B = !(A & B)
if (cc_0.IsNegative())
{
bits.And(cc_0.GetBits());
//!A | B = !(A & !B)
}
else
{
bits.AndNot(cc_0.GetBits());
}
}
}
else
{
bool curAlt_1 = alt;
if (nonBitSet == null)
{
if (curAlt_1 && !inverted && bits.IsEmpty())
{
nonBitSet = new CharClass.Anonymous_C17(cc_0);
//alt = true;
}
else
{
/*
* We keep the value of alt unchanged for
* constructions like [^[abc]fgb] by using
* the formula a ^ b == !a ^ !b.
*/
if (curAlt_1)
{
nonBitSet = new CharClass.Anonymous_C16(this, curAlt_1, cc_0);
//alt = true
}
else
{
nonBitSet = new CharClass.Anonymous_C15(this, curAlt_1, cc_0);
//alt = false
}
}
hideBits = true;
}
else
{
AbstractCharClass nb_2 = nonBitSet;
if (curAlt_1)
{
nonBitSet = new CharClass.Anonymous_C14(curAlt_1, cc_0, nb_2);
//alt = true
}
else
{
nonBitSet = new CharClass.Anonymous_C13(curAlt_1, cc_0, nb_2);
//alt = false
}
}
}
return(this);
}
