/* This file created from test/mpi/f77/io/c2f2cio.c with f77tof90 */

/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

/*

 * This file contains the C routines used in testing the c2f and f2c

 * handle conversion functions for MPI_File

 * The tests follow this pattern:

 *

 *  Fortran main program

 *     calls c routine with each handle type, with a prepared

 *     and valid handle (often requires constructing an object)

 *

 *     C routine uses xxx_f2c routine to get C handle, checks some

 *     properties (i.e., size and rank of communicator, contents of datatype)

 *

 *     Then the Fortran main program calls a C routine that provides

 *     a handle, and the Fortran program performs similar checks.

 *

 * We also assume that a C int is a Fortran integer.  If this is not the

 * case, these tests must be modified.

 */

/* style: allow:fprintf:1 sig:0 */

#include <stdio.h>

#include "mpi.h"

#include "../../include/mpitestconf.h"

#include <string.h>

/*

   Name mapping.  All routines are created with names that are lower case

   with a single trailing underscore.  This matches many compilers.

   We use #define to change the name for Fortran compilers that do

   not use the lowercase/underscore pattern

*/

#ifdef F77_NAME_UPPER

#define c2ffile_ C2FFILE

#define f2cfile_ F2CFILE

#elif defined(F77_NAME_LOWER) || defined(F77_NAME_MIXED)

/* Mixed is ok because we use lowercase in all uses */

#define c2ffile_ c2ffile

#define f2cfile_ f2cfile

#elif defined(F77_NAME_LOWER_2USCORE) || defined(F77_NAME_LOWER_USCORE) || \

      defined(F77_NAME_MIXED_USCORE)

/* Else leave name alone (routines have no underscore, so both

   of these map to a lowercase, single underscore) */

#else

#error 'Unrecognized Fortran name mapping'

#endif

/* Prototypes to keep compilers happy */

int c2ffile_(int *);

void f2cfile_(int *);

int c2ffile_(int *file)

{

    MPI_File cFile = MPI_File_f2c(*file);

    MPI_Group group, wgroup;

    int result;

    MPI_File_get_group(cFile, &group);

    MPI_Comm_group(MPI_COMM_WORLD, &wgroup);

    MPI_Group_compare(group, wgroup, &result);

    if (result != MPI_IDENT) {

        fprintf(stderr, "File: did not get expected group\n");

        return 1;

    }

    MPI_Group_free(&group);

    MPI_Group_free(&wgroup);

    return 0;

}

/*

 * The following routines provide handles to the calling Fortran program

 */

void f2cfile_(int *file)

{

    MPI_File cFile;

    int rc;

    rc = MPI_File_open(MPI_COMM_WORLD, (char *) "temp",

                       MPI_MODE_RDWR | MPI_MODE_DELETE_ON_CLOSE | MPI_MODE_CREATE,

                       MPI_INFO_NULL, &cFile);

    if (rc) {

        *file = 0;

    }

    else {

        *file = MPI_File_c2f(cFile);

    }

}