/* -*- 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);
    MPI_Finalize();
    return 0;

}
