/* -*- Mode: C++; c-basic-offset:4 ; -*- */
/*
 *
 *  (C) 2003 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include "mpi.h"
#include "mpitestconf.h"
#ifdef HAVE_IOSTREAM
// Not all C++ compilers have iostream instead of iostream.h
#include <iostream>
#ifdef HAVE_NAMESPACE_STD
// Those that do often need the std namespace; otherwise, a bare "cout"
// is likely to fail to compile
using namespace std;
#endif
#else
#include <iostream.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "mpitestcxx.h"

int main(int argc, char **argv)
{
    int errs = 0;
    MPI::File fh;
    MPI::Info info1, info2;
    bool flag;
    char filename[50];
    char *mykey;
    char *myvalue;

    MTest_Init();

    mykey = new char[MPI::MAX_INFO_KEY];
    myvalue = new char[MPI::MAX_INFO_VAL];

    // Open a simple file
    strcpy(filename, "iotest.txt");
    fh = MPI::File::Open(MPI::COMM_WORLD, filename, MPI::MODE_RDWR |
                         MPI::MODE_CREATE, MPI::INFO_NULL);

    // Try to set one of the available info hints
    info1 = MPI::Info::Create();
    info1.Set("access_style", "read_once,write_once");
    fh.Set_info(info1);
    info1.Free();

    info2 = fh.Get_info();
    flag = info2.Get("filename", MPI::MAX_INFO_VAL, myvalue);

    // An implementation isn't required to provide the filename (though
    // a high-quality implementation should)
    if (flag) {
        // If we find it, we must have the correct name
        if (strcmp(myvalue, filename) != 0 || strlen(myvalue) != 10) {
            errs++;
            cout << " Returned wrong value for the filename\n";
        }
    }
    info2.Free();

    fh.Close();

    MPI::COMM_WORLD.Barrier();
    if (MPI::COMM_WORLD.Get_rank() == 0)
        MPI::File::Delete(filename, MPI::INFO_NULL);

    delete[]mykey;
    delete[]myvalue;

    MTest_Finalize(errs);
    return 0;
}
