Method FinetuneGroups

library/src/system/scheduler.cpp:283–433

void Scheduler::FinetuneGroups()
{
  listType * lp;
  int strain, key, b1, b2;
  int numGroupsOrig = numGroups;

  for (int g = 0; g < numGroupsOrig; g++)
  {
    strain = group[g].strain;
    key = group[g].hash;

    lp = &list[strain][key];

    if (lp->length == 1)
      continue;

    else if (lp->length == 2)
    {
      // This happens quite often, so worth optimizing.

      b1 = lp->first;
      b2 = hands[lp->first].next;

      bool match = false;
      if (hands[b1].spareKey == hands[b2].spareKey)
      {
        // It is now extremely likely that it is a repeat hand,
        // but we have to be sure.
        match = true;
        for (int h = 0; h < DDS_HANDS && match; h++)
          for (int s = 0; s < DDS_SUITS && match; s++)
            if (hands[b1].remainCards[h][s] != hands[b2].remainCards[h][s])
              match = false;
      }

      if (match)
        continue;

      // Leave the first hand in place.
      hands[lp->first].next = -1;
      lp->last = lp->first;
      lp->length = 1;

      // Move the second hand to the special list.
      lp = &list[5][extraGroups];

      lp->first = b2;
      lp->last = b2;
      lp->length = 1;

      group[numGroups].strain = 5;
      group[numGroups].hash = extraGroups;

      numGroups++;
      extraGroups++;
    }

    else