// Make subset list from the R1pn.
// for example, (11,25, 39, 20) => {(11,25,39,20), (25,39,20), (39,20), (20)}
private void MakeSubsetofR1pn(ref R1pnList rsubset, int indexofbaseR1pn, R1pn r1)
{
int count = r1.cp;
R1pn r2 = new R1pn(r1.r1pn.Length);
r2.CopyFrom(r1);
for (int i = 0; i < count; i++)
{
if (!rsubset.IsExist(ref r2)) //check if rsubset already has the r2.
{
R1pn new1 = new R1pn(r1.r1pn.Length);
new1.CopyFrom(r2);
new1.indexofbaseR1pn = indexofbaseR1pn;
rsubset.Add(new1);
}
r2.ShiftLeft_1();
if (r2.cp <= 0)
{
break;
}
}
}
