/*
 * Copyright (c) 2005-2017 National Technology & Engineering Solutions
 * of Sandia, LLC (NTESS).  Under the terms of Contract DE-NA0003525 with
 * NTESS, the U.S. Government retains certain rights in this software.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 *
 *     * Neither the name of NTESS nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
/*****************************************************************************/
/*****************************************************************************/
/* Function(s) contained in this file:
 * 	ex_get_init_info()
 *****************************************************************************
 * This function reads information about the processors for which the
 * decomposition was performed.
 *****************************************************************************
 * Variable Index:
 *	exoid		  - The NetCDF ID of an already open NemesisI file.
 *	num_proc	  - The number of processors in the decomposition.
 *	num_proc_in_f	  - The number of processors the file contains
 *			    information for.
 */
/*****************************************************************************/
/*****************************************************************************/
/*****************************************************************************/

#include <exodusII.h>     // for ex_err, EX_MSG, etc
#include <exodusII_int.h> // for EX_FATAL, DIM_NUM_PROCS, etc

int ex_get_init_info(int exoid, int *num_proc, int *num_proc_in_f, char *ftype)
{
  int    dimid, status;
  size_t ltempsv;

  char errmsg[MAX_ERR_LENGTH];
  /*-----------------------------Execution begins-----------------------------*/

  EX_FUNC_ENTER();
  ex_check_valid_file_id(exoid, __func__);

  /* In case file isn't parallel, set the values here... */
  *num_proc      = 1;
  *num_proc_in_f = 1;

  /* Get the file type */
  if (ex_get_file_type(exoid, ftype) != EX_NOERR) {
    snprintf(errmsg, MAX_ERR_LENGTH, "ERROR: failed to get file type for file ID %d", exoid);
    ex_err_fn(exoid, __func__, errmsg, EX_LASTERR);

    EX_FUNC_LEAVE(EX_FATAL);
  }

  if ((status = nc_inq_dimid(exoid, DIM_NUM_PROCS, &dimid)) != NC_NOERR) {
    /* This isn't a parallel file.  Just return now with no error, but with num_proc and
     * num_proc_in_f set to 1 */
    EX_FUNC_LEAVE(EX_NOERR);
  }

  /* Get the value of the number of processors */
  if ((status = nc_inq_dimlen(exoid, dimid, &ltempsv)) != NC_NOERR) {
    snprintf(errmsg, MAX_ERR_LENGTH,
             "ERROR: failed to find length of dimension \"%s\" in file ID %d", DIM_NUM_PROCS,
             exoid);
    ex_err_fn(exoid, __func__, errmsg, status);

    EX_FUNC_LEAVE(EX_FATAL);
  }
  *num_proc = ltempsv;

  /* Get the dimension ID of processors that have info in this file */
  if ((status = nc_inq_dimid(exoid, DIM_NUM_PROCS_F, &dimid)) != NC_NOERR) {
    snprintf(errmsg, MAX_ERR_LENGTH, "ERROR: failed to find dimension ID for \"%s\" in file ID %d",
             DIM_NUM_PROCS_F, exoid);
    ex_err_fn(exoid, __func__, errmsg, status);

    EX_FUNC_LEAVE(EX_FATAL);
  }

  /* Get the value of the number of processors that have info in this file */
  if ((status = nc_inq_dimlen(exoid, dimid, &ltempsv)) != NC_NOERR) {
    snprintf(errmsg, MAX_ERR_LENGTH,
             "ERROR: failed to find length of dimension \"%s\" in file ID %d", DIM_NUM_PROCS_F,
             exoid);
    ex_err_fn(exoid, __func__, errmsg, status);

    EX_FUNC_LEAVE(EX_FATAL);
  }
  *num_proc_in_f = ltempsv;

  EX_FUNC_LEAVE(EX_NOERR);
}
