private bool _ALSXZ_DoublyLinked(UALS UA, UALS UB, int RCC) // *=*=* DoublyLinked subroutine *=*=*
//----- RCC -----
{
Bit81 UEz = new Bit81(); //Covered cells
bool solF = false;
foreach (int no in RCC.IEGet_BtoNo())
{
int noB = 1 << no;
UEz.Clear();
foreach (var P in UA.UCellLst.Where(p => (p.FreeB & noB) > 0))
{
UEz.BPSet(P.rc);
}
foreach (var P in UB.UCellLst.Where(p => (p.FreeB & noB) > 0))
{
UEz.BPSet(P.rc);
}
Bit81 Elm = (new Bit81(pBDL, noB)) - (UA.B81 | UB.B81); //Scan Cells
foreach (var rc in Elm.IEGet_rc())
{
if ((UEz - ConnectedCells[rc]).IsZero())
{
pBDL[rc].CancelB |= noB; solF = true;
}
}
}
//----- ALS element digit other than RCC -----
int nRCC = UA.FreeB.DifSet(RCC);
foreach (int no in nRCC.IEGet_BtoNo())
{
int noB = 1 << no;
UEz.Clear();
foreach (var P in UA.UCellLst.Where(p => (p.FreeB & noB) > 0))
{
UEz.BPSet(P.rc);
}
Bit81 Elm = (new Bit81(pBDL, noB)) - (UA.B81 | UB.B81); //Scan Cells
foreach (var rc in Elm.IEGet_rc())
{
if ((UEz - ConnectedCells[rc]).IsZero())
{
pBDL[rc].CancelB |= noB; solF = true;
}
}
}
nRCC = UB.FreeB.DifSet(RCC);
foreach (int no in nRCC.IEGet_BtoNo())
{
int noB = 1 << no;
UEz.Clear();
foreach (var P in UB.UCellLst.Where(p => (p.FreeB & noB) > 0))
{
UEz.BPSet(P.rc);
}
Bit81 Elm = (new Bit81(pBDL, noB)) - (UA.B81 | UB.B81); //Scan Cells
foreach (var rc in Elm.IEGet_rc())
{
if ((UEz - ConnectedCells[rc]).IsZero())
{
pBDL[rc].CancelB |= noB; solF = true;
}
}
}
return(solF);
}