/* -*- 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 <stdlib.h>

#include "mpitest.h"

#include "mpicolltest.h"

/*

static char MTEST_Descrip[] = "Simple intercomm allgatherv test";

*/

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

{

    int errs = 0, err;

    int *rbuf = 0, *sbuf = 0;

    int *recvcounts, *recvdispls;

    int leftGroup, i, count, rank, rsize;

    MPI_Comm comm;

    MPI_Datatype datatype;

    MTest_Init(&argc, &argv);

    datatype = MPI_INT;

    /* Get an intercommunicator */

    while (MTestGetIntercomm(&comm, &leftGroup, 4)) {

        if (comm == MPI_COMM_NULL)

            continue;

        MPI_Comm_rank(comm, &rank;;

        MPI_Comm_remote_size(comm, &rsize);

        /* To improve reporting of problems about operations, we

         * change the error handler to errors return */

        MPI_Errhandler_set(comm, MPI_ERRORS_RETURN);

        for (count = 1; count < 65000; count = 2 * count) {

            /* The left group will send rank to the right group;

             * The right group will send -rank to the left group */

            rbuf = (int *) malloc(count * rsize * sizeof(int));

            sbuf = (int *) malloc(count * sizeof(int));

            recvcounts = (int *) malloc(rsize * sizeof(int));

            recvdispls = (int *) malloc(rsize * sizeof(int));

            for (i = 0; i < count * rsize; i++)

                rbuf[i] = -1;

            for (i = 0; i < rsize; i++) {

                recvcounts[i] = count;

                recvdispls[i] = i * count;

            }

            if (leftGroup) {

                for (i = 0; i < count; i++)

                    sbuf[i] = i + rank * count;

            } else {

                for (i = 0; i < count; i++)

                    sbuf[i] = -(i + rank * count);

            }

            err = MTest_Allgatherv(sbuf, count, datatype,

                                   rbuf, recvcounts, recvdispls, datatype, comm);

            if (err) {

                errs++;

                MTestPrintError(err);

            }

            if (leftGroup) {

                for (i = 0; i < count * rsize; i++) {

                    if (rbuf[i] != -i) {

                        errs++;

                    }

                }

            } else {

                for (i = 0; i < count * rsize; i++) {

                    if (rbuf[i] != i) {

                        errs++;

                    }

                }

            }

            /* Use Allgather in a unidirectional way */

            for (i = 0; i < count * rsize; i++)

                rbuf[i] = -1;

            if (leftGroup) {

                err = MTest_Allgatherv(sbuf, 0, datatype,

                                       rbuf, recvcounts, recvdispls, datatype, comm);

                if (err) {

                    errs++;

                    MTestPrintError(err);

                }

                for (i = 0; i < count * rsize; i++) {

                    if (rbuf[i] != -i) {

                        errs++;

                    }

                }

            } else {

                for (i = 0; i < rsize; i++) {

                    recvcounts[i] = 0;

                    recvdispls[i] = 0;

                }

                err = MTest_Allgatherv(sbuf, count, datatype,

                                       rbuf, recvcounts, recvdispls, datatype, comm);

                if (err) {

                    errs++;

                    MTestPrintError(err);

                }

                for (i = 0; i < count * rsize; i++) {

                    if (rbuf[i] != -1) {

                        errs++;

                    }

                }

            }

            free(rbuf);

            free(sbuf);

            free(recvcounts);

            free(recvdispls);

        }

        MTestFreeComm(&comm);

    }

    MTest_Finalize(errs);

    return MTestReturnValue(errs);

}