/*
  Function: symbolFaxDgraph
  
  Unused

+*/
int symbolFaxDgraph(SCOTCH_Dgraph * dgraph, 
		    MPI_Comm pastix_comm)
{

  PASTIX_INT            baseval;
  PASTIX_INT            vertglobalnbr;
  PASTIX_INT            vertlocalnbr;
  PASTIX_INT            vertmaxnbr;
  PASTIX_INT            vertgstnbr;
  PASTIX_INT           *vertlocaltab;
  PASTIX_INT            edgelocalnbr;
  PASTIX_INT            edgeglobalnbr;
  PASTIX_INT            edgemaxnbr;
  PASTIX_INT           *edgelocaltab;
  PASTIX_INT           *edgeghosttab;
  

  SCOTCH_dgraphData   (dgraph,
		       (SCOTCH_Num *)&baseval,
		       (SCOTCH_Num *)&vertglobalnbr,
		       (SCOTCH_Num *)&vertlocalnbr,
		       (SCOTCH_Num *)&vertmaxnbr,
		       (SCOTCH_Num *)&vertgstnbr,
		       (SCOTCH_Num **)&vertlocaltab,
		       NULL,
		       NULL,
		       NULL,
		       (SCOTCH_Num *)&edgelocalnbr,
		       (SCOTCH_Num *)&edgeglobalnbr,
		       (SCOTCH_Num *)&edgemaxnbr,
		       (SCOTCH_Num **)&edgelocaltab,
		       (SCOTCH_Num **)&edgeghosttab,
		       NULL,
		       &pastix_comm);


  return EXIT_SUCCESS;
}
int
main (

int                 argc,
char *              argv[])
{
  MPI_Comm            proccomm;
  int                 procglbnbr;                 /* Number of processes sharing graph data */
  int                 proclocnum;                 /* Number of this process                 */
  SCOTCH_Num          vertglbnbr;
  SCOTCH_Num          vertlocnbr;
  SCOTCH_Num          baseval;
  SCOTCH_Dgraph       grafdat;
  SCOTCH_Dgraph       coargrafdat;
  SCOTCH_Num          coarvertglbnbr;
  SCOTCH_Num          coarvertlocnbr;
  double              coarrat;
  FILE *              file;
#ifdef SCOTCH_PTHREAD
  int                 thrdlvlreqval;
  int                 thrdlvlproval;
#endif /* SCOTCH_PTHREAD */
  int                 i;

  errorProg (argv[0]);

#ifdef SCOTCH_PTHREAD
  thrdlvlreqval = MPI_THREAD_MULTIPLE;
  if (MPI_Init_thread (&argc, &argv, thrdlvlreqval, &thrdlvlproval) != MPI_SUCCESS)
    errorPrint ("main: Cannot initialize (1)");
  if (thrdlvlreqval > thrdlvlproval)
    errorPrint ("main: MPI implementation is not thread-safe: recompile without SCOTCH_PTHREAD");
#else /* SCOTCH_PTHREAD */
  if (MPI_Init (&argc, &argv) != MPI_SUCCESS)
    errorPrint ("main: Cannot initialize (2)");
#endif /* SCOTCH_PTHREAD */

  if (argc != 2) {
    errorPrint ("main: invalid number of parameters");
    exit       (1);
  }

  proccomm = MPI_COMM_WORLD;
  MPI_Comm_size (proccomm, &procglbnbr);          /* Get communicator data */
  MPI_Comm_rank (proccomm, &proclocnum);

  fprintf (stderr, "Proc %2d of %2d, pid %d\n", proclocnum, procglbnbr, getpid ());

#ifndef SCOTCH_CHECK_AUTO
  if (proclocnum == 0) {                          /* Synchronize on keybord input */
    char           c;

    printf ("Waiting for key press...\n");
    scanf ("%c", &c);
  }
#endif /* SCOTCH_CHECK_AUTO */

  if (MPI_Barrier (proccomm) != MPI_SUCCESS) {    /* Synchronize for debug */
    errorPrint ("main: cannot communicate");
    return     (1);
  }

  if (SCOTCH_dgraphInit (&grafdat, proccomm) != 0) { /* Initialize source graph */
    errorPrint ("main: cannot initialize graph (1)");
    return     (1);
  }

  file = NULL;
  if ((proclocnum == 0) &&
      ((file = fopen (argv[1], "r")) == NULL)) {
    errorPrint ("main: cannot open graph file");
    return     (1);
  }

  if (SCOTCH_dgraphLoad (&grafdat, file, 0, 0) != 0) {
    errorPrint ("main: cannot load graph");
    return     (1);
  }

  if (file != NULL)
    fclose (file);

  if (MPI_Barrier (proccomm) != MPI_SUCCESS) {    /* Synchronize for debug */
    errorPrint ("main: cannot communicate");
    return     (1);
  }

  SCOTCH_dgraphData (&grafdat, NULL, &vertglbnbr, &vertlocnbr, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);

  coarrat = 0.8;                                  /* Lazy coarsening ratio */

  for (i = 0; i < 3; i ++) {                      /* For all test cases */
    SCOTCH_Num *        multloctab;
    SCOTCH_Num          multlocsiz;
    SCOTCH_Num          foldval;
    char *              foldstr;
    char *              coarstr;
    int                 procnum;
    int                 o;

    switch (i) {
      case 0 :
        multlocsiz = vertlocnbr;
        foldval    = SCOTCH_COARSENNONE;
        foldstr    = "Plain coarsening";
        break;
      case 1 :
        multlocsiz = (SCOTCH_Num) (((double) vertglbnbr * coarrat) / (double) (procglbnbr / 2)) + 1;
        foldval    = SCOTCH_COARSENFOLD;
        foldstr    = "Folding";
        break;
      case 2 :
        multlocsiz = (SCOTCH_Num) (((double) vertglbnbr * coarrat) / (double) (procglbnbr / 2)) + 1;
        foldval    = SCOTCH_COARSENFOLDDUP;
        foldstr    = "Folding with duplication";
        break;
    }

    if (proclocnum == 0)
      printf ("%s\n", foldstr);

    if ((multloctab = malloc (multlocsiz * 2 * sizeof (SCOTCH_Num))) == NULL) {
      errorPrint ("main: cannot allocate multinode array");
      return     (1);
    }

    if (SCOTCH_dgraphInit (&coargrafdat, proccomm) != 0) { /* Initialize band graph */
      errorPrint ("main: cannot initialize graph (2)");
      return     (1);
    }

    o = SCOTCH_dgraphCoarsen (&grafdat, 0, coarrat, foldval, &coargrafdat, multloctab);

    SCOTCH_dgraphData (&coargrafdat, NULL, &coarvertglbnbr, &coarvertlocnbr, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);

    for (procnum = 0; procnum < procglbnbr; procnum ++) {
      switch (o) {
        case 0 :
          coarstr = "coarse graph created";
          break;
        case 1 :
          coarstr = "graph could not be coarsened";
          break;
        case 2 :
          coarstr = "folded graph not created here";
          break;
        case 3 :
          coarstr = "cannot create coarse graph";
          break;
      }

      if (procnum == proclocnum)
        printf ("%d: %s (%ld / %ld / %ld)\n", procnum, coarstr, (long) multlocsiz, (long) coarvertlocnbr, (long) vertlocnbr);

      MPI_Barrier (proccomm);
    }

    if (coarvertlocnbr > multlocsiz) {
      errorPrint ("main: invalid local multinode array size");
      return     (1);
    }

    SCOTCH_dgraphExit (&coargrafdat);
    free (multloctab);
  }

  SCOTCH_dgraphExit (&grafdat);

  MPI_Finalize ();
  exit         (0);
}
int
main (

int                 argc,
char *              argv[])
{
  MPI_Comm            proccomm;
  int                 procglbnbr;                 /* Number of processes sharing graph data */
  int                 proclocnum;                 /* Number of this process                 */
  SCOTCH_Num          vertglbnbr;
  SCOTCH_Num          vertlocnbr;
  SCOTCH_Num *        fronloctab;
  SCOTCH_Num          baseval;
  SCOTCH_Dgraph       grafdat;
  SCOTCH_Dgraph       bandgrafdat;
  SCOTCH_Num          bandvertglbnbr;
  SCOTCH_Num          bandvertlocnbr;
  SCOTCH_Num *        bandvlblloctab;
  FILE *              file;
  int                 procnum;
#ifdef SCOTCH_PTHREAD
  int                 thrdlvlreqval;
  int                 thrdlvlproval;
#endif /* SCOTCH_PTHREAD */

  SCOTCH_errorProg (argv[0]);

#ifdef SCOTCH_PTHREAD
  thrdlvlreqval = MPI_THREAD_MULTIPLE;
  if (MPI_Init_thread (&argc, &argv, thrdlvlreqval, &thrdlvlproval) != MPI_SUCCESS)
    SCOTCH_errorPrint ("main: Cannot initialize (1)");
  if (thrdlvlreqval > thrdlvlproval)
    SCOTCH_errorPrint ("main: MPI implementation is not thread-safe: recompile without SCOTCH_PTHREAD");
#else /* SCOTCH_PTHREAD */
  if (MPI_Init (&argc, &argv) != MPI_SUCCESS)
    SCOTCH_errorPrint ("main: Cannot initialize (2)");
#endif /* SCOTCH_PTHREAD */

  if (argc != 2) {
    SCOTCH_errorPrint ("usage: %s graph_file", argv[0]);
    exit (EXIT_FAILURE);
  }

  proccomm = MPI_COMM_WORLD;
  MPI_Comm_size (proccomm, &procglbnbr);          /* Get communicator data */
  MPI_Comm_rank (proccomm, &proclocnum);

  fprintf (stderr, "Proc %2d of %2d, pid %d\n", proclocnum, procglbnbr, getpid ());

#ifdef SCOTCH_CHECK_NOAUTO
  if (proclocnum == 0) {                          /* Synchronize on keybord input */
    char           c;

    printf ("Waiting for key press...\n");
    scanf ("%c", &c);
  }
#endif /* SCOTCH_CHECK_NOAUTO */

  if (MPI_Barrier (proccomm) != MPI_SUCCESS) {    /* Synchronize for debug */
    SCOTCH_errorPrint ("main: cannot communicate (1)");
    exit (EXIT_FAILURE);
  }

  if (SCOTCH_dgraphInit (&grafdat, proccomm) != 0) { /* Initialize source graph */
    SCOTCH_errorPrint ("main: cannot initialize graph (1)");
    exit (EXIT_FAILURE);
  }

  file = NULL;
  if ((proclocnum == 0) &&
      ((file = fopen (argv[1], "r")) == NULL)) {
    SCOTCH_errorPrint ("main: cannot open graph file");
    exit (EXIT_FAILURE);
  }

  if (SCOTCH_dgraphLoad (&grafdat, file, 0, 0) != 0) {
    SCOTCH_errorPrint ("main: cannot load graph");
    exit (EXIT_FAILURE);
  }

  if (file != NULL)
    fclose (file);

  if (MPI_Barrier (proccomm) != MPI_SUCCESS) {    /* Synchronize for debug */
    SCOTCH_errorPrint ("main: cannot communicate (2)");
    exit (EXIT_FAILURE);
  }

  SCOTCH_dgraphData (&grafdat, NULL, &vertglbnbr, &vertlocnbr, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);

  if ((fronloctab = malloc (vertlocnbr * sizeof (SCOTCH_Num))) == NULL) {
    SCOTCH_errorPrint ("main: cannot allocate frontier array");
    exit (EXIT_FAILURE);
  }

  if (SCOTCH_dgraphInit (&bandgrafdat, proccomm) != 0) { /* Initialize band graph */
    SCOTCH_errorPrint ("main: cannot initialize graph (2)");
    exit (EXIT_FAILURE);
  }

  fronloctab[0] = 0;

  if (SCOTCH_dgraphBand (&grafdat, (proclocnum == 1) ? 1 : 0, fronloctab, 4, &bandgrafdat) != 0) {
    SCOTCH_errorPrint ("main: cannot compute band graph");
    exit (EXIT_FAILURE);
  }

  free (fronloctab);

  SCOTCH_dgraphData (&bandgrafdat, &baseval, &bandvertglbnbr, &bandvertlocnbr, NULL, NULL, NULL, NULL, NULL, &bandvlblloctab, NULL, NULL, NULL, NULL, NULL, NULL, NULL);

  for (procnum = 0; procnum < procglbnbr; procnum ++) {
    SCOTCH_Num          bandvertlocnum;

    MPI_Barrier (proccomm);

    if (procnum == proclocnum) {
      if ((file = fopen ("/tmp/test_scotch_dgraph_band.map", (procnum == 0) ? "w" : "a+")) == NULL) {
        SCOTCH_errorPrint ("main: cannot open mapping file");
        exit (EXIT_FAILURE);
      }

      if (procnum == 0)
        fprintf (file, "%ld\n", (long) bandvertglbnbr);

      for (bandvertlocnum = 0; bandvertlocnum < bandvertlocnbr; bandvertlocnum ++)
        fprintf (file, "%ld\t1\n", (long) bandvlblloctab[bandvertlocnum]);

      fclose (file);
    }
  }

  SCOTCH_dgraphExit (&bandgrafdat);
  SCOTCH_dgraphExit (&grafdat);

  MPI_Finalize ();
  exit (EXIT_SUCCESS);
}