/* -*- 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 "mpitestconf.h"

#include <stdio.h>

#include "mpitest.h"

/*

static char MTEST_Descrip[] = "Test MPI_MAX operations on optional datatypes dupported by MPICH";

*/

/*

 * This test looks at the handling of char and types that  are not required

 * integers (e.g., long long).  MPICH allows

 * these as well.  A strict MPI test should not include this test.

 */

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

{

    int errs = 0;

    int rank, size;

    MPI_Comm comm;

    char cinbuf[3], coutbuf[3];

    signed char scinbuf[3], scoutbuf[3];

    unsigned char ucinbuf[3], ucoutbuf[3];

    MTest_Init(&argc, &argv);

    comm = MPI_COMM_WORLD;

    MPI_Comm_rank(comm, &rank;;

    MPI_Comm_size(comm, &size);

#ifndef USE_STRICT_MPI

    /* char */

    MTestPrintfMsg(10, "Reduce of MPI_CHAR\n");

    cinbuf[0] = 1;

    cinbuf[1] = 0;

    cinbuf[2] = rank;

    coutbuf[0] = 0;

    coutbuf[1] = 1;

    coutbuf[2] = 1;

    MPI_Reduce(cinbuf, coutbuf, 3, MPI_CHAR, MPI_MAX, 0, comm);

    if (rank == 0) {

        if (coutbuf[0] != 1) {

            errs++;

            fprintf(stderr, "char MAX(1) test failed\n");

        }

        if (coutbuf[1] != 0) {

            errs++;

            fprintf(stderr, "char MAX(0) test failed\n");

        }

        if (size < 128 && coutbuf[2] != size - 1) {

            errs++;

            fprintf(stderr, "char MAX(>) test failed\n");

        }

    }

#endif /* USE_STRICT_MPI */

    /* signed char */

    MTestPrintfMsg(10, "Reduce of MPI_SIGNED_CHAR\n");

    scinbuf[0] = 1;

    scinbuf[1] = 0;

    scinbuf[2] = rank;

    scoutbuf[0] = 0;

    scoutbuf[1] = 1;

    scoutbuf[2] = 1;

    MPI_Reduce(scinbuf, scoutbuf, 3, MPI_SIGNED_CHAR, MPI_MAX, 0, comm);

    if (rank == 0) {

        if (scoutbuf[0] != 1) {

            errs++;

            fprintf(stderr, "signed char MAX(1) test failed\n");

        }

        if (scoutbuf[1] != 0) {

            errs++;

            fprintf(stderr, "signed char MAX(0) test failed\n");

        }

        if (size < 128 && scoutbuf[2] != size - 1) {

            errs++;

            fprintf(stderr, "signed char MAX(>) test failed\n");

        }

    }

    /* unsigned char */

    MTestPrintfMsg(10, "Reduce of MPI_UNSIGNED_CHAR\n");

    ucinbuf[0] = 1;

    ucinbuf[1] = 0;

    ucinbuf[2] = rank;

    ucoutbuf[0] = 0;

    ucoutbuf[1] = 1;

    ucoutbuf[2] = 1;

    MPI_Reduce(ucinbuf, ucoutbuf, 3, MPI_UNSIGNED_CHAR, MPI_MAX, 0, comm);

    if (rank == 0) {

        if (ucoutbuf[0] != 1) {

            errs++;

            fprintf(stderr, "unsigned char MAX(1) test failed\n");

        }

        if (ucoutbuf[1]) {

            errs++;

            fprintf(stderr, "unsigned char MAX(0) test failed\n");

        }

        if (size < 256 && ucoutbuf[2] != size - 1) {

            errs++;

            fprintf(stderr, "unsigned char MAX(>) test failed\n");

        }

    }

#ifdef HAVE_LONG_DOUBLE

    {

        long double ldinbuf[3], ldoutbuf[3];

        /* long double */

        MTEST_VG_MEM_INIT(ldinbuf, 3* sizeof(ldinbuf[0]));

        ldinbuf[0] = 1;

        ldinbuf[1] = 0;

        ldinbuf[2] = rank;

        ldoutbuf[0] = 0;

        ldoutbuf[1] = 1;

        ldoutbuf[2] = 1;

        if (MPI_LONG_DOUBLE != MPI_DATATYPE_NULL) {

            MTestPrintfMsg(10, "Reduce of MPI_LONG_DOUBLE\n");

            MPI_Reduce(ldinbuf, ldoutbuf, 3, MPI_LONG_DOUBLE, MPI_MAX, 0, comm);

            if (rank == 0) {

                if (ldoutbuf[0] != 1) {

                    errs++;

                    fprintf(stderr, "long double MAX(1) test failed\n");

                }

                if (ldoutbuf[1] != 0.0) {

                    errs++;

                    fprintf(stderr, "long double MAX(0) test failed\n");

                }

                if (ldoutbuf[2] != size - 1) {

                    errs++;

                    fprintf(stderr, "long double MAX(>) test failed\n");

                }

            }

        }

    }

#endif /* HAVE_LONG_DOUBLE */

#ifdef HAVE_LONG_LONG

    {

        long long llinbuf[3], lloutbuf[3];

        /* long long */

        llinbuf[0] = 1;

        llinbuf[1] = 0;

        llinbuf[2] = rank;

        lloutbuf[0] = 0;

        lloutbuf[1] = 1;

        lloutbuf[2] = 1;

        if (MPI_LONG_LONG != MPI_DATATYPE_NULL) {

            MTestPrintfMsg(10, "Reduce of MPI_LONG_LONG\n");

            MPI_Reduce(llinbuf, lloutbuf, 3, MPI_LONG_LONG, MPI_MAX, 0, comm);

            if (rank == 0) {

                if (lloutbuf[0] != 1) {

                    errs++;

                    fprintf(stderr, "long long MAX(1) test failed\n");

                }

                if (lloutbuf[1] != 0) {

                    errs++;

                    fprintf(stderr, "long long MAX(0) test failed\n");

                }

                if (lloutbuf[2] != size - 1) {

                    errs++;

                    fprintf(stderr, "long long MAX(>) test failed\n");

                }

            }

        }

    }

#endif /* HAVE_LONG_LONG */

    MTest_Finalize(errs);

    MPI_Finalize();

    return 0;

}