/* -*- 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"

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

{

    int errs = 0;

    int dims[2];

    int periods[2];

    int size, rank, newrank;

    MTest_Init(&argc, &argv);

    MPI_Comm_size(MPI_COMM_WORLD, &size);

    MPI_Comm_rank(MPI_COMM_WORLD, &rank;;

    /* This defines a one dimensional cartision grid with a single point */

    periods[0] = 1;

    dims[0] = 1;

    MPI_Cart_map(MPI_COMM_WORLD, 1, dims, periods, &newrank);

    if (rank > 0) {

        if (newrank != MPI_UNDEFINED) {

            errs++;

            printf("rank outside of input communicator not UNDEFINED\n");

        }

    } else {

        if (rank != newrank) {

            errs++;

            printf("Newrank not defined and should be 0\n");

        }

    }

    /* As of MPI 2.1, a 0-dimensional topology is valid (its also a

     * point) */

    MPI_Cart_map(MPI_COMM_WORLD, 0, dims, periods, &newrank);

    if (rank > 0) {

        if (newrank != MPI_UNDEFINED) {

            errs++;

            printf("rank outside of input communicator not UNDEFINED\n");

        }

    } else {

        /* rank == 0 */

        if (rank != newrank) {

            errs++;

            printf("Newrank not defined and should be 0\n");

        }

    }

    MTest_Finalize(errs);

    return MTestReturnValue(errs);

}