/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
 *  (C) 2006 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include <stdio.h>
#include "mpi.h"
#include "mpitest.h"
#include "mpicolltest.h"

/* Very simple test that Bcast handled mismatched lengths (while not a
   common user error, we've seen it several times, so good handling of
   this helps to reduce bug reports)
*/

int verbose = 0;

int main(int argc, char *argv[])
{
    int buf[10], ierr, errs = 0;
    int rank;
    char str[MPI_MAX_ERROR_STRING + 1];
    int slen;

    MTEST_VG_MEM_INIT(buf, 10 * sizeof(int));

    MTest_Init(&argc, &argv);

    MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);

    if (rank == 0) {
        ierr = MTest_Bcast(buf, 1, MPI_INT, 0, MPI_COMM_WORLD);
    }
    else {
        ierr = MTest_Bcast(buf, 10, MPI_INT, 0, MPI_COMM_WORLD);
    }
    if (ierr == MPI_SUCCESS) {
        if (rank != 0) {
            /* The root process may not detect that a too-long buffer
             * was provided by the non-root processes, but those processes
             * should detect this. */
            errs++;
            printf("Did not detect mismatched length (long) on process %d\n", rank);
        }
    }
    else {
        if (verbose) {
            MPI_Error_string(ierr, str, &slen);
            printf("Found expected error; message is: %s\n", str);
        }
    }

    if (rank == 0) {
        ierr = MTest_Bcast(buf, 10, MPI_INT, 0, MPI_COMM_WORLD);
    }
    else {
        ierr = MTest_Bcast(buf, 1, MPI_INT, 0, MPI_COMM_WORLD);
    }
    if (ierr == MPI_SUCCESS) {
        if (rank != 0) {
            /* The root process may not detect that a too-short buffer
             * was provided by the non-root processes, but those processes
             * should detect this. */
            errs++;
            printf("Did not detect mismatched length (short) on process %d\n", rank);
        }
    }
    else {
        if (verbose) {
            MPI_Error_string(ierr, str, &slen);
            printf("Found expected error; message is: %s\n", str);
        }
    }

    MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_ARE_FATAL);

    MTest_Finalize(errs);
    MPI_Finalize();
    return 0;
}
