/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *

 *  (C) 2003 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpi.h"

#include <stdio.h>

#include "mpitest.h"

/*

static char MTEST_Descrip[] = "Get the group of an intercommunicator";

*/

int main(int argc, char *argv[])

{

    int errs = 0;

    int rank, size, grank, gsize;

    int minsize = 2, isleft;

    MPI_Comm comm;

    MPI_Group group;

    MTest_Init(&argc, &argv);

    /* The following illustrates the use of the routines to

     * run through a selection of communicators and datatypes.

     * Use subsets of these for tests that do not involve combinations

     * of communicators, datatypes, and counts of datatypes */

    while (MTestGetIntercomm(&comm, &isleft, minsize)) {

        if (comm == MPI_COMM_NULL)

            continue;

        /* Determine the sender and receiver */

        MPI_Comm_rank(comm, &rank;;

        MPI_Comm_size(comm, &size);

        MPI_Comm_group(comm, &group);

        MPI_Group_rank(group, &grank);

        MPI_Group_size(group, &gsize);

        if (rank != grank) {

            errs++;

            fprintf(stderr, "Ranks of groups do not match %d != %d\n", rank, grank);

        }

        if (size != gsize) {

            errs++;

            fprintf(stderr, "Sizes of groups do not match %d != %d\n", size, gsize);

        }

        MPI_Group_free(&group);

        MTestFreeComm(&comm);

    }

    MTest_Finalize(errs);

    MPI_Finalize();

    return 0;

}