Method MakeGroups

library/src/system/scheduler.cpp:224–280

void Scheduler::MakeGroups(const Boards& bds)
{
  Deal const * dl;
  listType * lp;

  for (int b = 0; b < numHands; b++)
  {
    dl = &bds.deals[b];

    int strain = dl->trump;

    unsigned dlXor =
      dl->remainCards[0][0] ^
      dl->remainCards[1][1] ^
      dl->remainCards[2][2] ^
      dl->remainCards[3][3];

    int key = static_cast<int>(((dlXor >> 2) ^ (dlXor >> 6)) & 0x7f);

    hands[b].spareKey = static_cast<int>(
                          (dl->remainCards[1][0] << 17) ^
                          (dl->remainCards[2][1] << 11) ^
                          (dl->remainCards[3][2] << 5) ^
                          (dl->remainCards[0][3] >> 2));

    for (int h = 0; h < DDS_HANDS; h++)
      for (int s = 0; s < DDS_SUITS; s++)
        hands[b].remainCards[h][s] = dl->remainCards[h][s];

    hands[b].NTflag = (strain == 4 ? 1 : 0);
    hands[b].first = dl->first;
    hands[b].strain = strain;
    hands[b].fanout = Scheduler::Fanout(* dl);
    // hands[b].strength = Scheduler::Strength(* dl);

    lp = &list[strain][key];

    if (lp->first == -1)
    {
      lp->first = b;
      lp->last = b;
      lp->length = 1;

      group[numGroups].strain = strain;
      group[numGroups].hash = key;
      numGroups++;
    }
    else
    {
      int l = lp->last;
      hands[l].next = b;

      lp->last = b;
      lp->length++;
    }
  }
}