public BDD buildAdd(BDDDomain that, long value)
{
if (this.varNum() != that.varNum())
{
throw new BDDException();
}
return(buildAdd(that, this.varNum(), value));
}
public BDD buildAdd(BDDDomain that, int bits, long value)
{
if (bits > this.varNum() ||
bits > that.varNum())
{
throw new BDDException("Number of bits requested (" + bits + ") is larger than domain sizes " + this.varNum() + "," + that.varNum());
}
BDDFactory bdd = getFactory();
if (value == 0L)
{
BDD result = bdd.one();
int n;
for (n = 0; n < bits; n++)
{
BDD b = bdd.ithVar(this.ivar[n]);
b.biimpWith(bdd.ithVar(that.ivar[n]));
result.andWith(b);
}
for (; n < Math.Max(this.varNum(), that.varNum()); n++)
{
BDD b = (n < this.varNum()) ? bdd.nithVar(this.ivar[n]) : bdd.one();
b.andWith((n < that.varNum()) ? bdd.nithVar(that.ivar[n]) : bdd.one());
result.andWith(b);
}
return(result);
}
int[] vars = new int[bits];
System.arraycopy(this.ivar, 0, vars, 0, vars.Length);
BDDBitVector y = bdd.buildVector(vars);
BDDBitVector v = bdd.constantVector(bits, value);
BDDBitVector z = y.add(v);
int[] thatvars = new int[bits];
System.arraycopy(that.ivar, 0, thatvars, 0, thatvars.Length);
BDDBitVector x = bdd.buildVector(thatvars);
BDD result = bdd.one();
int n;
for (n = 0; n < x.size(); n++)
{
BDD b = x.bitvec[n].biimp(z.bitvec[n]);
result.andWith(b);
}
for (; n < Math.Max(this.varNum(), that.varNum()); n++)
{
BDD b = (n < this.varNum()) ? bdd.nithVar(this.ivar[n]) : bdd.one();
b.andWith((n < that.varNum()) ? bdd.nithVar(that.ivar[n]) : bdd.one());
result.andWith(b);
}
x.free(); y.free(); z.free(); v.free();
return(result);
}
/**
* Builds a BDD which is true for all the possible assignments to the
* variable blocks that makes the blocks equal.
*
* Compare to fdd_equals/fdd_equ.
*
* @param that
* @return BDD
*/
public BDD buildEquals(BDDDomain that)
{
if (!this.size().equals(that.size()))
{
throw new BDDException("Size of " + this + " != size of that " + that + "( " + this.size() + " vs " + that.size() + ")");
}
BDDFactory factory = getFactory();
BDD e = factory.one();
int[] this_ivar = this.vars();
int[] that_ivar = that.vars();
for (int n = 0; n < this.varNum(); n++)
{
BDD a = factory.ithVar(this_ivar[n]);
BDD b = factory.ithVar(that_ivar[n]);
a.biimpWith(b);
e.andWith(a);
}
return(e);
}
/**
* Defines each variable in the finite domain block p1 to be paired with the
* corresponding variable in p2.
*
* Compare to fdd_setpair.
*/
public void set(BDDDomain p1, BDDDomain p2)
{
int[] ivar1 = p1.vars();
int[] ivar2 = p2.vars();
this.set(ivar1, ivar2);
}