/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
/*
 * Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2005 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2008 High Performance Computing Center Stuttgart,
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * Copyright (c) 2008      Sun Microsystems, Inc.  All rights reserved.
 * Copyright (c) 2013      Los Alamos National Security, LLC.  All rights
 *                         reserved.
 * Copyright (c) 2015-2018 Research Organization for Information Science
 *                         and Technology (RIST). All rights reserved.
 * Copyright (c) 2017      IBM Corporation. All rights reserved.
 * $COPYRIGHT$
 *
 * Additional copyrights may follow
 *
 * $HEADER$
 */

#include "ompi_config.h"

#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/params.h"
#include "ompi/errhandler/errhandler.h"
#include "ompi/datatype/ompi_datatype.h"
#include "ompi/info/info.h"
#include "ompi/file/file.h"
#include "ompi/memchecker.h"

#if OMPI_BUILD_MPI_PROFILING
#if OPAL_HAVE_WEAK_SYMBOLS
#pragma weak MPI_File_set_view = PMPI_File_set_view
#endif
#define MPI_File_set_view PMPI_File_set_view
#endif

static const char FUNC_NAME[] = "MPI_File_set_view";


int MPI_File_set_view(MPI_File fh, MPI_Offset disp, MPI_Datatype etype,
                      MPI_Datatype filetype, const char *datarep, MPI_Info info)
{
    int rc;

    MEMCHECKER(
        memchecker_datatype(etype);
    );

    if (MPI_PARAM_CHECK) {
        rc = MPI_SUCCESS;
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
        if (ompi_file_invalid(fh)) {
            rc = MPI_ERR_FILE;
            fh = MPI_FILE_NULL;
        } else {
           OMPI_CHECK_DATATYPE_FOR_VIEW(rc, etype, 0);
           if (MPI_SUCCESS == rc) {
               OMPI_CHECK_DATATYPE_FOR_VIEW(rc, filetype, 0);
           }
        }
        if ( NULL == datarep) {
            rc = MPI_ERR_UNSUPPORTED_DATAREP;
            fh = MPI_FILE_NULL;            
        }
        OMPI_ERRHANDLER_CHECK(rc, fh, rc, FUNC_NAME);
    }

    /* Call the back-end io component function */

    switch (fh->f_io_version) {
    case MCA_IO_BASE_V_2_0_0:
        rc = fh->f_io_selected_module.v2_0_0.
          io_module_file_set_view(fh, disp, etype, filetype, datarep, &(info->super));
        break;

    default:
        rc = MPI_ERR_INTERN;
        break;
    }

    /* All done */

    OMPI_ERRHANDLER_RETURN(rc, fh, rc, FUNC_NAME);
}