/*
 * Copyright (c) 2005 Sandia Corporation. Under the terms of Contract
 * DE-AC04-94AL85000 with Sandia Corporation, the U.S. Governement
 * 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 Sandia Corporation 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.
 * 
 */
/*****************************************************************************
*
* exppem - ex_put_partial_elem_map
*
* entry conditions - 
*   input parameters:
*       int     exoid                   exodus file id
*       int     map_id                  element map id
*       int     ent_start               first entry in map
*       int     ent_count               number of entries in map
*       int     *elem_map               element map
*
* exit conditions - 
*
* revision history - 
*
*
*****************************************************************************/

#include "exodusII.h"
#include "exodusII_int.h"
#include <stdlib.h> /* for free() */

/*!
 * writes an element map; this is a vector of integers of length number
 * of elements
 */
int ex_put_partial_elem_map (int exoid,
           int map_id,
           int ent_start,
           int ent_count, 
           const int *elem_map)
{
  int status;
  int dimid, varid, map_ndx, map_exists;
  size_t start[1]; 
  size_t num_elem_maps, num_elem, count[1];
  int cur_num_elem_maps;
  char errmsg[MAX_ERR_LENGTH];

  exerrval = 0; /* clear error code */
  map_exists = 0;

  /* Make sure the file contains elements */
  if (nc_inq_dimid (exoid, DIM_NUM_ELEM, &dimid) != NC_NOERR ) {
    return (EX_NOERR);
  }

  /* first check if any element maps are specified */
  if ((status = nc_inq_dimid(exoid, DIM_NUM_EM, &dimid)) != NC_NOERR) {
    exerrval = status;
    sprintf(errmsg,
      "Error: no element maps specified in file id %d",
      exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }
  
  /* Check for duplicate element map id entry */
  map_ndx = ex_id_lkup(exoid,EX_ELEM_MAP,map_id); 
  if (exerrval == EX_LOOKUPFAIL) {   /* did not find the element map id */
    map_exists = 0; /* Map is being defined */
    map_ndx    = -1;
  } else {
    map_exists = 1; /* A portion of this map has already been written */
  }

  if (!map_exists) {
    /* Get number of element maps initialized for this file */
    if ((status = nc_inq_dimlen(exoid,dimid,&num_elem_maps)) != NC_NOERR) {
      exerrval = status;
      sprintf(errmsg,
        "Error: failed to get number of element maps in file id %d",
        exoid);
      ex_err("ex_put_partial_elem_map",errmsg,exerrval);
      return (EX_FATAL);
    }

    /* Keep track of the total number of element maps defined using a
       counter stored in a linked list keyed by exoid.  NOTE:
       ex_get_file_item is used to find the number of element maps for a
       specific file and returns that value.
    */
    cur_num_elem_maps = ex_get_file_item(exoid, ex_get_counter_list(EX_ELEM_MAP));
    if (cur_num_elem_maps >= (int)num_elem_maps) {
      exerrval = EX_FATAL;
      sprintf(errmsg,
        "Error: exceeded number of element maps (%ld) specified in file id %d",
        (long)num_elem_maps,exoid);
      ex_err("ex_put_partial_elem_map",errmsg,exerrval);
      return (EX_FATAL);
    }
    
    /*   NOTE: ex_inc_file_item  is used to find the number of element maps
   for a specific file and returns that value incremented. */
    cur_num_elem_maps = ex_inc_file_item(exoid, ex_get_counter_list(EX_ELEM_MAP));
  } else {
    cur_num_elem_maps = map_ndx-1;
  }

  /* determine number of elements */
  if ((status = nc_inq_dimid(exoid, DIM_NUM_ELEM, &dimid)) != NC_NOERR) {
    exerrval = status;
    sprintf(errmsg,
      "Error: couldn't determine number of elements in file id %d",
      exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }

  if ((status = nc_inq_dimlen(exoid, dimid, &num_elem)) != NC_NOERR) {
    exerrval = status;
    sprintf(errmsg,
      "Error: failed to get number of elements in file id %d",
      exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }

  /* Check input parameters for a valid range of numbers */
  if (ent_start <= 0 || ent_start > (int)num_elem) {
    exerrval = EX_FATAL;
    sprintf(errmsg,
      "Error: start count is invalid in file id %d",
      exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }
  if (ent_count < 0) {
    exerrval = EX_FATAL;
    sprintf(errmsg,
      "Error: Invalid count value in file id %d",
      exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }
  if (ent_start+ent_count-1 > (int)num_elem) {
    exerrval = EX_FATAL;
    sprintf(errmsg,
      "Error: start+count-1 is larger than element count in file id %d",
      exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }
  

  /* write out information to previously defined variable */

  /* first get id of variable */
  if ((status = nc_inq_varid(exoid, VAR_EM_PROP(1), &varid)) != NC_NOERR) {
    exerrval = status;
    sprintf(errmsg,
      "Error: failed to locate element map ids in file id %d",
      exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }

  /* then, write out element map id */
  if (!map_exists) {
    start[0] = cur_num_elem_maps;

    if ((status = nc_put_var1_int(exoid, varid, start, &map_id)) != NC_NOERR) {
      exerrval = status;
      sprintf(errmsg,
        "Error: failed to store element map id %d in file id %d",
        map_id,exoid);
      ex_err("ex_put_partial_elem_map",errmsg,exerrval);
      return (EX_FATAL);
    }
  }
  
  /* locate variable array in which to store the element map */
  if ((status = nc_inq_varid(exoid,VAR_ELEM_MAP(cur_num_elem_maps+1),
           &varid)) != NC_NOERR) {
    exerrval = status;
    sprintf(errmsg,
      "Error: failed to locate element map %d in file id %d",
      map_id,exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }

  /* write out the element map  */
  start[0] = ent_start-1;
  count[0] = ent_count;

  status = nc_put_vara_int(exoid, varid, start, count, elem_map);

  if (status != NC_NOERR) {
    exerrval = status;
    sprintf(errmsg,
      "Error: failed to store element map in file id %d",
      exoid);
    ex_err("ex_put_partial_elem_map",errmsg,exerrval);
    return (EX_FATAL);
  }

  return (EX_NOERR);
}