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

/*

 *

 *   Copyright (C) 1997 University of Chicago.

 *   See COPYRIGHT notice in top-level directory.

 */

#include "mpioimpl.h"

#ifdef HAVE_WEAK_SYMBOLS

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPI_File_get_view = PMPI_File_get_view

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPI_File_get_view MPI_File_get_view

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPI_File_get_view as PMPI_File_get_view

/* end of weak pragmas */

#elif defined(HAVE_WEAK_ATTRIBUTE)

int MPI_File_get_view(MPI_File fh, MPI_Offset * disp, MPI_Datatype * etype, MPI_Datatype * filetype,

                      char *datarep) __attribute__ ((weak, alias("PMPI_File_get_view")));

#endif

/* Include mapping from MPI->PMPI */

#define MPIO_BUILD_PROFILING

#include "mpioprof.h"

#endif

/*@

    MPI_File_get_view - Returns the file view

Input Parameters:

. fh - file handle (handle)

Output Parameters:

. disp - displacement (nonnegative integer)

. etype - elementary datatype (handle)

. filetype - filetype (handle)

. datarep - data representation (string)

.N fortran

@*/

int MPI_File_get_view(MPI_File fh, MPI_Offset * disp, MPI_Datatype * etype,

                      MPI_Datatype * filetype, char *datarep)

{

    int error_code;

    ADIO_File adio_fh;

    static char myname[] = "MPI_FILE_GET_VIEW";

    int i, j, k, combiner;

    MPI_Datatype copy_etype, copy_filetype;

    ROMIO_THREAD_CS_ENTER();

    adio_fh = MPIO_File_resolve(fh);

    /* --BEGIN ERROR HANDLING-- */

    MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);

    if (datarep == NULL) {

        error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,

                                          myname, __LINE__, MPI_ERR_ARG, "**iodatarepnomem", 0);

        error_code = MPIO_Err_return_file(adio_fh, error_code);

        goto fn_exit;

    }

    /* --END ERROR HANDLING-- */

    *disp = adio_fh->disp;

    ADIOI_Strncpy(datarep,

                  (adio_fh->is_external32 ? "external32" : "native"), MPI_MAX_DATAREP_STRING);

    MPI_Type_get_envelope(adio_fh->etype, &i, &j, &k, &combiner);

    if (combiner == MPI_COMBINER_NAMED)

        *etype = adio_fh->etype;

    else {

        /* FIXME: It is wrong to use MPI_Type_contiguous; the user could choose to

         * re-implement MPI_Type_contiguous in an unexpected way.  Either use

         * MPID_Barrier as in MPICH or PMPI_Type_contiguous */

        MPI_Type_contiguous(1, adio_fh->etype, &copy_etype);

        /* FIXME: Ditto for MPI_Type_commit - use NMPI or PMPI */

        MPI_Type_commit(&copy_etype);

        *etype = copy_etype;

    }

    /* FIXME: Ditto for MPI_Type_xxx - use NMPI or PMPI */

    MPI_Type_get_envelope(adio_fh->filetype, &i, &j, &k, &combiner);

    if (combiner == MPI_COMBINER_NAMED)

        *filetype = adio_fh->filetype;

    else {

        MPI_Type_contiguous(1, adio_fh->filetype, &copy_filetype);

        MPI_Type_commit(&copy_filetype);

        *filetype = copy_filetype;

    }

  fn_exit:

    ROMIO_THREAD_CS_EXIT();

    return MPI_SUCCESS;

}