/***************************************************************
          Function: pset
          **************************************************************/
        private void pset(
            Vector dtrans_group
            )
        {
            int i;
            int size;
            CDTrans dtrans;

            size = dtrans_group.size();
            for (i = 0; i < size; ++i)
            {
                dtrans = (CDTrans) dtrans_group.elementAt(i);
                System.Console.Write(dtrans.m_label + " ");
            }
        }
        /***************************************************************
          function: print_set
          **************************************************************/
        public void print_set(
            Vector nfa_set
            )
        {
            int size;
            int elem;
            CNfa nfa;

            size = nfa_set.size();

            if (0 == size)
            {
                System.Console.Write("empty ");
            }

            for (elem = 0; elem < size; ++elem)
            {
                nfa = (CNfa) nfa_set.elementAt(elem);
                /*System.Console.Write(m_spec.m_nfa_states.indexOf(nfa) + " ");*/
                System.Console.Write(nfa.m_label + " ");
            }
        }
        /***************************************************************
          Function: init_groups
          Description:
          **************************************************************/
        private void init_groups(
            )
        {
            int i;
            int j;
            int group_count;
            int size;
              //  CAccept accept;
            CDTrans dtrans;
            Vector dtrans_group;
            CDTrans first;
            bool group_found;

            m_group = new Vector();
            group_count = 0;

            size = m_spec.m_dtrans_vector.size();
            m_ingroup = new int[size];

            for (i = 0; i < size; ++i)
            {
                group_found = false;
                dtrans = (CDTrans) m_spec.m_dtrans_vector.elementAt(i);

                if (CUtility.DEBUG)
                {
                    CUtility.ASSERT(i == dtrans.m_label);
                    CUtility.ASSERT(false == group_found);
                    CUtility.ASSERT(group_count == m_group.size());
                }

                for (j = 0; j < group_count; ++j)
                {
                    dtrans_group = (Vector) m_group.elementAt(j);

                    if (CUtility.DEBUG)
                    {
                        CUtility.ASSERT(false == group_found);
                        CUtility.ASSERT(0 < dtrans_group.size());
                    }

                    first = (CDTrans) dtrans_group.elementAt(0);

                    if (CUtility.SLOW_DEBUG)
                    {
                        CDTrans check;
                        int k;
                        int s;

                        s = dtrans_group.size();
                        CUtility.ASSERT(0 < s);

                        for (k = 1; k < s; ++k)
                        {
                            check = (CDTrans) dtrans_group.elementAt(k);
                            CUtility.ASSERT(check.m_accept == first.m_accept);
                        }
                    }

                    if (first.m_accept == dtrans.m_accept)
                    {
                        dtrans_group.addElement(dtrans);
                        m_ingroup[i] = j;
                        group_found = true;

                        if (CUtility.DEBUG)
                        {
                            CUtility.ASSERT(j == m_ingroup[dtrans.m_label]);
                        }

                        break;
                    }
                }

                if (false == group_found)
                {
                    dtrans_group = new Vector();
                    dtrans_group.addElement(dtrans);
                    m_ingroup[i] = m_group.size();
                    m_group.addElement(dtrans_group);
                    ++group_count;
                }
            }

            if (m_spec.m_verbose
                && true == CUtility.OLD_DUMP_DEBUG)
            {
                System.Console.WriteLine("Initial grouping:");
                pgroups();
                System.Console.WriteLine();
            }
        }
 /** Self-test. */
 public static void _Main(string[] args)
 {
     const int ITER = 500;
     const int RANGE= 65536;
     SparseBitSet a = new SparseBitSet();
     CUtility.ASSERT(!a.Get(0) && !a.Get(1));
     CUtility.ASSERT(!a.Get(123329));
     a.Set(0); CUtility.ASSERT(a.Get(0) && !a.Get(1));
     a.Set(1); CUtility.ASSERT(a.Get(0) && a.Get(1));
     a.clearAll();
     CUtility.ASSERT(!a.Get(0) && !a.Get(1));
     Random r = new Random();
     Vector v = new Vector();
     for (int n=0; n<ITER; n++)
     {
         int rr = ((r.Next()>>1) % RANGE) << 1;
         a.Set(rr); v.addElement(rr);
         // check that all the numbers are there.
         CUtility.ASSERT(a.Get(rr) && !a.Get(rr+1) && !a.Get(rr-1));
         for (int i=0; i<v.size(); i++)
             CUtility.ASSERT(a.Get((int)v.elementAt(i)));
     }
     SparseBitSet b = (SparseBitSet) a.Clone();
     CUtility.ASSERT(a.Equals(b) && b.Equals(a));
     for (int n=0; n<ITER/2; n++)
     {
         int rr = (r.Next()>>1) % v.size();
         int m = (int)v.elementAt(rr);
         b.clear(m); v.removeElementAt(rr);
         // check that numbers are removed properly.
         CUtility.ASSERT(!b.Get(m));
     }
     CUtility.ASSERT(!a.Equals(b));
     SparseBitSet c = (SparseBitSet) a.Clone();
     SparseBitSet d = (SparseBitSet) a.Clone();
     c.and(a);
     CUtility.ASSERT(c.Equals(a) && a.Equals(c));
     c.xor(a);
     CUtility.ASSERT(!c.Equals(a) && c.size()==0);
     d.or(b);
     CUtility.ASSERT(d.Equals(a) && !b.Equals(d));
     d.and(b);
     CUtility.ASSERT(!d.Equals(a) && b.Equals(d));
     d.xor(a);
     CUtility.ASSERT(!d.Equals(a) && !b.Equals(d));
     c.or(d); c.or(b);
     CUtility.ASSERT(c.Equals(a) && a.Equals(c));
     c = (SparseBitSet) d.Clone();
     c.and(b);
     CUtility.ASSERT(c.size()==0);
     System.Console.WriteLine("Success.");
 }