/*
 * Copyright (c) 1994 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.
 * 
 */
/*****************************************************************************
*
* exgssn - ex_get_side_set_node_list
*
* author - Sandia National Laboratories
*          Vic Yarberry    - Original
*
*
* environment - UNIX
*
* entry conditions - 
*   input parameters:
*       int     exoid                   exodus file id
*       int     side_set_id             side set id
*
* exit conditions - 
*       int     *side_set_node_cnt_list returned array of number of nodes for
*                                       side or face
*       int     *side_set_node_list     array of nodes
*
* revision history - 
*
*  $Id: exgssn.c,v 1.3 2005/07/19 23:40:10 andy Exp $
*
*****************************************************************************/

#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include "exodusII.h"
#include "exodusII_int.h"
/*
 * This routine is designed to read the Exodus II V 2.0 side set side 
 * definition  and return a ExodusI style side set node definition.



 */

int ex_get_side_set_node_list(int exoid,
                          int side_set_id,
                          int *side_set_node_cnt_list,
                          int *side_set_node_list)
{
  int i, j, m; 
  int  num_side_sets, num_elem_blks, num_df, ndim;
  int tot_num_elem = 0, tot_num_ss_elem = 0, elem_num = 0;
  int connect_offset, side_num, node_pos;
  int *elem_blk_ids, *connect; 
  int *ss_elem_ndx, *ss_elem_node_ndx, *ss_parm_ndx;
  int *side_set_elem_list, *side_set_side_list;
  int elem_ctr, node_ctr, elem_num_pos;
  int num_elem_in_blk, num_nodes_per_elem, num_attr;
  float fdum;
  char *cdum, elem_type[MAX_STR_LENGTH+1];

  struct elem_blk_parm
  {
    char elem_type[MAX_STR_LENGTH+1];
    int elem_blk_id;
    int num_elem_in_blk;
    int num_nodes_per_elem;
    int num_nodes_per_side;
    int num_attr;
    int elem_ctr;
    int elem_type_val;
  } *elem_blk_parms;

/* side to node translation tables - 
     These tables are used to look up the side number based on the
     first and second node in the side/face list. The side node order
     is found in the original Exodus document, SAND87-2997. The element
     node order is found in the ExodusII document, SAND92-2137. These
     tables were generated by following the right-hand rule for determining
     the outward normal.
*/
  /* triangle */
  static int tri_table[3][3] = {
  /*   1        2        3                                             side   */
    {1,2,4}, {2,3,5}, {3,1,6}                                       /* nodes  */
  };

  /* triangle 3d */
  static int tri3_table[5][7] = {
  /*       1                2                                          side   */
    {1,2,3,4,5,6,7}, {3,2,1,6,5,4,7},                               /* nodes  */
  /*       3              4              5                             side   */
    {1,2,4,0,0,0,0}, {2,3,5,0,0,0,0}, {3,1,6,0,0,0,0}               /* nodes  */
  };

  /* quad */
  static int quad_table[4][3] = {
  /*   1        2        3        4                                    side   */
    {1,2,5}, {2,3,6}, {3,4,7}, {4,1,8}                              /* nodes  */
  };

  /* shell */
  static int shell_table[6][8] = {
  /*        1                  2                                       side   */
    {1,2,3,4,5,6,7,8}, {1,4,3,2,8,7,6,5} ,                          /* nodes  */
  /*        3                  4                                       side   */
    {1,2,5,0,0,0,0,0}, {2,3,6,0,0,0,0,0} ,                          /* nodes  */
  /*        5                  6                                       side   */
    {3,4,7,0,0,0,0,0}, {4,1,8,0,0,0,0,0}                            /* nodes  */
  };

  /* tetra */
  static int tetra_table[4][6] = {
  /*      1              2               3               4            side   */
    {1,2,4,5,9,8}, {2,3,4,6,10,9}, {1,4,3,8,10,7}, {1,3,2,7,6,5}   /* nodes  */
  };

  /* wedge */
  static int wedge_table[5][8] = {
  /*        1                     2                     3              side   */
    {1,2,5,4,7,11,13,10}, {2,3,6,5,8,12,14,11}, {1,4,6,3,10,15,12,9},
  /*        4                  5                                       side   */
    {1,3,2,0,9,8,7,0}, {4,5,6,0,13,14,15,0}                         /* nodes  */
  };

  /* hex */
  static int hex_table[6][9] = {
  /*         1                        2                                side   */
    {1,2,6,5,9,14,17,13,26}, {2,3,7,6,10,15,18,14,25},              /* nodes  */
  /*         3                        4                                side   */
    {3,4,8,7,11,16,19,15,27}, {1,5,8,4,13,20,16,12,24},             /* nodes  */
  /*         5                        6                                side   */
    {1,4,3,2,12,11,10,9,22},  {5,6,7,8,17,18,19,20,23}              /* nodes  */
  };

  /* pyramid */
  static int pyramid_table[5][8] = {
  /*          1                   2                    3              side   */
    {1,2,5,0,6,11,10,0}, {2,3,5,0,7,12,11,0}, {3,4,5,0,8,13,12,0}, /* nodes  */
  /*          4                  5                                    side   */
    {1,5,4,0,10,13,9,0}, {1,4,3,2,9,8,7,6}                         /* nodes  */
  };


  char errmsg[MAX_ERR_LENGTH];

  exerrval = 0; /* clear error code */

  cdum = 0; /* initialize even though it is not used */

/* first check if any side sets are specified */
/* inquire how many side sets have been stored */

  if ((ex_inquire(exoid, EX_INQ_SIDE_SETS, &num_side_sets, &fdum, cdum)) == -1)
  {
    sprintf(errmsg,
           "Error: failed to get number of side sets in file id %d",exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return(EX_FATAL);
  }

  if (num_side_sets == 0)
  {
    sprintf(errmsg,
           "Warning: no side sets defined in file id %d",exoid);
    ex_err("ex_get_side_set_node_list",errmsg,EX_WARN);
    return(EX_WARN);
  }

/* Lookup index of side set id in VAR_SS_IDS array */

  ex_id_lkup(exoid,VAR_SS_IDS,side_set_id);
  if (exerrval != 0) 
  {
     if (exerrval == EX_NULLENTITY)
     {
       sprintf(errmsg,
              "Warning: side set %d is NULL in file id %d",
               side_set_id,exoid);
       ex_err("ex_get_side_set_node_list",errmsg,EX_MSG);
       return (EX_WARN);
     }
     else
     {

     sprintf(errmsg,
     "Error: failed to locate side set id %d in VAR_SS_IDS array in file id %d",
             side_set_id,exoid);
     ex_err("ex_get_side_set_node_list",errmsg,exerrval);
     return (EX_FATAL);
     }
  }

  if ((ex_inquire(exoid, EX_INQ_ELEM_BLK, &num_elem_blks, &fdum, cdum)) == -1)
  {
    sprintf(errmsg,
           "Error: failed to get number of element blocks in file id %d",exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return(EX_FATAL);
  }

  if ((ex_inquire(exoid, EX_INQ_ELEM, &tot_num_elem, &fdum, cdum)) == -1)
  {
    sprintf(errmsg,
           "Error: failed to get total number of elements in file id %d",exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return(EX_FATAL);
  }

/* get the dimensionality of the coordinates;  this is necessary to
   distinguish between 2d TRIs and 3d TRIs */

  if ((ex_inquire(exoid, EX_INQ_DIM, &ndim, &fdum, cdum)) == -1)
  {
    sprintf(errmsg,
           "Error: failed to get dimensionality in file id %d",exoid);
    ex_err("ex_cvt_nodes_to_sides",errmsg,exerrval);
    return(EX_FATAL);
  }

  /* First determine the  # of elements in the side set*/
  if ((ex_get_side_set_param(exoid,side_set_id,&tot_num_ss_elem,&num_df)) == -1)
  {
    sprintf(errmsg,
         "Error: failed to get number of elements in side set %d in file id %d",
            side_set_id, exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return(EX_FATAL);
  }

  /* Allocate space for the side set element list */
  if (!(side_set_elem_list=malloc(tot_num_ss_elem*sizeof(int))))
  {
    exerrval = EX_MEMFAIL;
    sprintf(errmsg,
    "Error: failed to allocate space for side set element list for file id %d",
            exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return (EX_FATAL);
  }

  /* Allocate space for the side set side list */
  if (!(side_set_side_list=malloc(tot_num_ss_elem*sizeof(int))))
  {
    free(side_set_elem_list);
    exerrval = EX_MEMFAIL;
    sprintf(errmsg,
    "Error: failed to allocate space for side set side list for file id %d",
            exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return (EX_FATAL);
  }

  if (ex_get_side_set(exoid, side_set_id, 
                      side_set_elem_list, side_set_side_list) == -1)
  {
    free(side_set_elem_list);
    free(side_set_side_list);
    sprintf(errmsg,
    "Error: failed to get side set %d in file id %d",
            side_set_id, exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return (EX_FATAL);
  }

  /* Allocate space for the ss element index array */
  if (!(ss_elem_ndx= malloc(tot_num_ss_elem*sizeof(int))))
  {
    free(side_set_elem_list);
    free(side_set_side_list);
    exerrval = EX_MEMFAIL;
    sprintf(errmsg,
 "Error: failed to allocate space for side set elem sort array for file id %d",
            exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return (EX_FATAL);
  }

  /* Sort side set element list into index array  - non-destructive */
  for (i=0;i<tot_num_ss_elem;i++)
    ss_elem_ndx[i] = i; /* init index array to current position */

  ex_iqsort(side_set_elem_list, ss_elem_ndx,tot_num_ss_elem);


  /* Allocate space for the element block ids */
  if (!(elem_blk_ids= malloc(num_elem_blks*sizeof(int))))
  {
    exerrval = EX_MEMFAIL;
    free(ss_elem_ndx);
    free(side_set_side_list);
    free(side_set_elem_list);
    sprintf(errmsg,
        "Error: failed to allocate space for element block ids for file id %d",
            exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return (EX_FATAL);
  }

  if (ex_get_elem_blk_ids(exoid, elem_blk_ids) == -1)
  {
    free(elem_blk_ids);
    free(ss_elem_ndx);
    free(side_set_side_list);
    free(side_set_elem_list);
    sprintf(errmsg,
           "Error: failed to get element block ids in file id %d",
            exoid);
    ex_err("ex_get_side_set_node_list",errmsg,EX_MSG);
    return(EX_FATAL);
  } 

  /* Allocate space for the element block params */
  if (!(elem_blk_parms= malloc(num_elem_blks*sizeof(struct elem_blk_parm))))
  {
    free(elem_blk_ids);
    free(ss_elem_ndx);
    free(side_set_side_list);
    free(side_set_elem_list);
    exerrval = EX_MEMFAIL;
    sprintf(errmsg,
      "Error: failed to allocate space for element block params for file id %d",
            exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return (EX_FATAL);
  }

  elem_ctr = 0;
  for (i=0; i<num_elem_blks; i++)
  {
    /* read in an element block parameter */
    if ((ex_get_elem_block (exoid,
                            elem_blk_ids[i],
                            elem_type,
                            &num_elem_in_blk,
                            &num_nodes_per_elem,
                            &num_attr)) == -1)
    {
      free(elem_blk_parms);
      free(elem_blk_ids);
      free(ss_elem_ndx);
      free(side_set_side_list);
      free(side_set_elem_list);
      sprintf(errmsg,
             "Error: failed to get element block %d parameters in file id %d",
              elem_blk_ids[i], exoid);
      ex_err("ex_get_side_set_node_list",errmsg,EX_MSG);
      return(EX_FATAL);
    }

    elem_blk_parms[i].num_elem_in_blk = num_elem_in_blk;
    elem_blk_parms[i].num_nodes_per_elem = num_nodes_per_elem;
    elem_blk_parms[i].num_attr = num_attr;

    for (m=0; (size_t)m < strlen(elem_type); m++)
      elem_blk_parms[i].elem_type[m] = 
              (char)toupper((int)elem_type[m]);
    elem_blk_parms[i].elem_type[m] = '\0';

    if (strncmp(elem_blk_parms[i].elem_type,"CIRCLE",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = CIRCLE;
      /* set side set node stride */
        elem_blk_parms[i].num_nodes_per_side = 1;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"SPHERE",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = SPHERE;
      /* set side set node stride */
        elem_blk_parms[i].num_nodes_per_side = 1;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"QUAD",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = QUAD;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 4)
        elem_blk_parms[i].num_nodes_per_side = 2;
      else if (elem_blk_parms[i].num_nodes_per_elem == 5)
        elem_blk_parms[i].num_nodes_per_side = 2;
      else
        elem_blk_parms[i].num_nodes_per_side = 3;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"TRIANGLE",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = TRIANGLE;
      /* set default side set node stride */
      if (ndim == 2)  /* 2d TRIs */
      {
        if (elem_blk_parms[i].num_nodes_per_elem == 3)
          elem_blk_parms[i].num_nodes_per_side = 2;
        else 
          elem_blk_parms[i].num_nodes_per_side = 3;
      }
      else if (ndim == 3)  /* 3d TRIs */
      {
        if (elem_blk_parms[i].num_nodes_per_elem == 3)
          elem_blk_parms[i].num_nodes_per_side = 3;
        else 
          elem_blk_parms[i].num_nodes_per_side = 6;
      }
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"SHELL",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = SHELL;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 2) /* KLUDGE for 2D Shells*/
        elem_blk_parms[i].num_nodes_per_side = 2;
      else if (elem_blk_parms[i].num_nodes_per_elem == 4)
        elem_blk_parms[i].num_nodes_per_side = 4;
      else
        elem_blk_parms[i].num_nodes_per_side = 8;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"HEX",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = HEX;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 8)  /* 8-node bricks */
        elem_blk_parms[i].num_nodes_per_side = 4;
      else if (elem_blk_parms[i].num_nodes_per_elem == 9)  /* 9-node bricks */
        elem_blk_parms[i].num_nodes_per_side = 4;
      else if (elem_blk_parms[i].num_nodes_per_elem == 12)  /* HEXSHELLS */
        elem_blk_parms[i].num_nodes_per_side = 4;
      else if (elem_blk_parms[i].num_nodes_per_elem == 27)  /* 27-node bricks */
        elem_blk_parms[i].num_nodes_per_side = 9;
      else 
        elem_blk_parms[i].num_nodes_per_side = 8;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"TETRA",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = TETRA;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 4)
        elem_blk_parms[i].num_nodes_per_side = 3;
      else if (elem_blk_parms[i].num_nodes_per_elem == 8)
        elem_blk_parms[i].num_nodes_per_side = 4;
      else
        elem_blk_parms[i].num_nodes_per_side = 6;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"WEDGE",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = WEDGE;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 6)
        elem_blk_parms[i].num_nodes_per_side = 4;
      else
        elem_blk_parms[i].num_nodes_per_side = 8;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"PYRAMID",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = PYRAMID;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 5)
        elem_blk_parms[i].num_nodes_per_side = 4;
      else
        elem_blk_parms[i].num_nodes_per_side = 8;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"BEAM",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = BEAM;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 2)
        elem_blk_parms[i].num_nodes_per_side = 2;
      else 
        elem_blk_parms[i].num_nodes_per_side = 3;
    }
    else if ( (strncmp(elem_blk_parms[i].elem_type,"TRUSS",3) == 0) ||
              (strncmp(elem_blk_parms[i].elem_type,"BAR",3) == 0) ||
              (strncmp(elem_blk_parms[i].elem_type,"EDGE",3) == 0) )
    {
      elem_blk_parms[i].elem_type_val = TRUSS;
      /* determine side set node stride */
      if (elem_blk_parms[i].num_nodes_per_elem == 2)
        elem_blk_parms[i].num_nodes_per_side = 2;
      else 
        elem_blk_parms[i].num_nodes_per_side = 3;
    }
    else if (strncmp(elem_blk_parms[i].elem_type,"NULL",3) == 0)
    {
      elem_blk_parms[i].elem_type_val = '\0';
      elem_blk_parms[i].num_nodes_per_side = 0;
      elem_blk_parms[i].num_elem_in_blk = 0;
    }
    else
    { /* unsupported element type; no problem if no sides specified for
         this element block */
      elem_blk_parms[i].elem_type_val = UNK;
      elem_blk_parms[i].num_nodes_per_side = 0;
    }
    elem_blk_parms[i].elem_blk_id = elem_blk_ids[i];    /* save id */
    elem_ctr += elem_blk_parms[i].num_elem_in_blk;
    elem_blk_parms[i].elem_ctr = elem_ctr;      /* save elem number max */
  }


  /* Allocate space for the ss element to element block parameter index array */
  if (!(ss_parm_ndx=malloc(tot_num_ss_elem*sizeof(int))))
  {
    free(elem_blk_parms);
    free(elem_blk_ids);
    free(ss_elem_ndx);
    free(side_set_side_list);
    free(side_set_elem_list);
    exerrval = EX_MEMFAIL;
    sprintf(errmsg,
"Error: failed to allocate space for side set elem parms index for file id %d"
,
            exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
    return (EX_FATAL);
  }


  /* Allocate space for the ss element to node list index array */
  if (!(ss_elem_node_ndx=malloc(tot_num_ss_elem*sizeof(int))))
  {
    free(ss_parm_ndx);
    free(elem_blk_parms);
    free(elem_blk_ids);
    free(ss_elem_ndx);
    free(side_set_side_list);
    free(side_set_elem_list);
    exerrval = EX_MEMFAIL;
    sprintf(errmsg,
"Error: failed to allocate space for side set elem to node index for file id %d",
            exoid);
    ex_err("ex_get_side_set_node_list",errmsg,exerrval);
           
    return (EX_FATAL);
  }

/* Build side set element to node list index and side set element 
   parameter index.
*/
  node_ctr = 0;
  for (i=0;i<tot_num_ss_elem;i++)
  {
    for (j=0; j<num_elem_blks; j++)
    {
      if (elem_blk_parms[j].elem_type_val != '\0')
      if (side_set_elem_list[i] <= elem_blk_parms[j].elem_ctr)
        break;
    }

    if (j >= num_elem_blks)
    {
      exerrval = EX_BADPARAM;
      sprintf(errmsg,
             "Error: Invalid element number %d found in side set %d in file %d",
              side_set_elem_list[i], side_set_id, exoid);
      free(ss_parm_ndx);
      free(ss_elem_node_ndx);
      free(elem_blk_parms);
      free(elem_blk_ids);
      free(ss_elem_ndx);
      free(side_set_side_list);
      free(side_set_elem_list);
      ex_err("ex_get_side_set_node_list",errmsg,EX_MSG);
      return (EX_FATAL);
    }

    ss_parm_ndx[i] = j; /* assign parameter block index */
    ss_elem_node_ndx[i] = node_ctr;     /* assign node list index */

    /* Update node_ctr (which points to next node in chain */

    /* WEDGEs with 3 node sides (side 4 or 5) are special cases */
    if (elem_blk_parms[j].elem_type_val == WEDGE &&
        (side_set_side_list[i] == 4 || side_set_side_list[i] == 5))
    {
      if (elem_blk_parms[j].num_nodes_per_elem == 6)
        node_ctr += 3;  /* 3 node side */
      else
        node_ctr += 6;  /* 6 node side */
    }
    /* PYRAMIDSs with 3 node sides (sides 1,2,3,4) are also special */
    else if (elem_blk_parms[j].elem_type_val == PYRAMID &&
             (side_set_side_list[i] < 5))
    {
      if (elem_blk_parms[j].num_nodes_per_elem == 5)
        node_ctr += 3;  /* 3 node side */
      else
        node_ctr += 6;  /* 6 node side */
    }
    /* side numbers 3,4,5,6 for SHELLs are also special */
    else if (elem_blk_parms[j].elem_type_val == SHELL &&
        (side_set_side_list[i] > 2 ))
    {
      if (elem_blk_parms[j].num_nodes_per_elem == 4)
        node_ctr += 2;  /* 2 node side */
      else
        node_ctr += 3;  /* 3 node side */
    }
    /* side numbers 3,4,5 for 3d TRIs are also special */
    else if (elem_blk_parms[j].elem_type_val == TRIANGLE &&
             ndim == 3 &&
             side_set_side_list[i] > 2 )
    {
      if (elem_blk_parms[j].num_nodes_per_elem == 3)  /* 3-node TRI */
        node_ctr += 2;  /* 2 node side */
      else   /* 6-node TRI */
        node_ctr += 3;  /* 3 node side */
    }
    else /* all other element types */
      node_ctr += elem_blk_parms[j].num_nodes_per_side;
  }

  /* All setup, ready to go ... */

  elem_ctr=0;

  for (j=0; j < tot_num_ss_elem; j++)
  {

    if (side_set_elem_list[ss_elem_ndx[j]] > elem_ctr)
    {
      /* release connectivity array space and get next one */
      if (elem_ctr > 0)
      {
        free(connect);
      }

      /* Allocate space for the connectivity array for new element block */
      if (!(connect=malloc(elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].num_elem_in_blk*
                           elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].num_nodes_per_elem*
                           (int)sizeof(int))))
      {
        free(elem_blk_parms);
        free(elem_blk_ids);
        free(ss_elem_ndx);
        free(ss_elem_node_ndx);
        free(ss_parm_ndx);
        free(side_set_side_list);
        free(side_set_elem_list);
        exerrval = EX_MEMFAIL;
        sprintf(errmsg,
        "Error: failed to allocate space for connectivity array for file id %d",
                exoid);
        ex_err("ex_get_side_set_node_list",errmsg,exerrval);
        return (EX_FATAL);
      }

      /* get connectivity array */
      if (ex_get_elem_conn(
                        exoid,
                        elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].elem_blk_id,
                        connect) == -1)
      {
        free(connect);
        free(elem_blk_parms);
        free(elem_blk_ids);
        free(ss_elem_ndx);
        free(ss_elem_node_ndx);
        free(ss_parm_ndx);
        free(side_set_side_list);
        free(side_set_elem_list);
        sprintf(errmsg,
        "Error: failed to allocate space for connectivity array for file id %d",
                exoid);
        ex_err("ex_get_side_set_node_list",errmsg,exerrval);
        return (EX_FATAL);
      }
      elem_ctr = elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].elem_ctr;
    }
/*  For each side in side set, use the appropriate lookup table to  
      determine the nodes from the connect array. */

    elem_num = side_set_elem_list[ss_elem_ndx[j]]-1;/* element number 0-based*/
    /* calculate the relative element number position in it's block*/

    elem_num_pos = elem_num - 
                  (elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].elem_ctr -
                   elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].num_elem_in_blk);

    /* calculate the beginning of the node list for this element by
         using the ss_elem_node_ndx index into the side_sets_node_index
         and adding the element number position * number of nodes per elem */

    num_nodes_per_elem = 
               elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].num_nodes_per_elem;
    node_pos = ss_elem_node_ndx[ss_elem_ndx[j]];
    connect_offset = num_nodes_per_elem*elem_num_pos;
    side_num = side_set_side_list[ss_elem_ndx[j]]-1;

    switch (elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].elem_type_val)
    {
      case CIRCLE:
      case SPHERE:
      { /* Note: no side-node lookup table is used for this simple case */
        side_set_node_list[node_pos] = connect[connect_offset];
        side_set_node_cnt_list[ss_elem_ndx[j]] = 1;   /* 1 node object */
        break;
      }
      case TRUSS:
      case BEAM:
      { /* Note: no side-node lookup table is used for this simple case */
        side_set_node_list[node_pos] = connect[connect_offset];
        side_set_node_list[node_pos+1] = connect[connect_offset+1];
        side_set_node_cnt_list[ss_elem_ndx[j]] = 2;   /* 2 node object */
        if (num_nodes_per_elem > 2)
        {
          side_set_node_cnt_list[ss_elem_ndx[j]] = 3; /* 3 node object */
          side_set_node_list[node_pos+2] = connect[connect_offset+2];
        }
        break;
      }
      case TRIANGLE:
      {
        if (side_num+1 < 1 || side_num+1 > 5) /* side number range check */
        {
          exerrval = EX_BADPARAM;
          sprintf(errmsg,
                 "Error: Invalid triangle edge number %d in file id %d",
                  side_num+1, exoid);
          ex_err("ex_get_side_set_node_list",errmsg,exerrval);
          free(connect);
          free(elem_blk_parms);
          free(elem_blk_ids);
          free(ss_elem_ndx);
          free(ss_elem_node_ndx);
          free(ss_parm_ndx);
          free(side_set_side_list);
          free(side_set_elem_list);
          return(EX_FATAL);
        }

        if (ndim == 2)   /* 2d TRIs */
        {
          side_set_node_list[node_pos] = 
            connect[connect_offset+tri_table[side_num][0]-1];
          side_set_node_list[node_pos+1] = 
            connect[connect_offset+tri_table[side_num][1]-1];
          side_set_node_cnt_list[ss_elem_ndx[j]] = 2;   /* 2 node object */
          if (num_nodes_per_elem > 3)   /* 6-node TRI  */
          {
            side_set_node_cnt_list[ss_elem_ndx[j]] = 3; /* 3 node object */
            side_set_node_list[node_pos+2] = 
              connect[connect_offset+tri_table[side_num][2]-1];
          }
        }
        else if (ndim == 3)  /* 3d TRIs */
        {
          side_set_node_list[node_pos] = 
            connect[connect_offset+tri3_table[side_num][0]-1];
          side_set_node_list[node_pos+1] = 
            connect[connect_offset+tri3_table[side_num][1]-1];
          side_set_node_cnt_list[ss_elem_ndx[j]] = 2;   /* 2 node object */
          if (side_num+1 <= 2)  /* 3- or 6-node face */
          {
            if (num_nodes_per_elem == 3)  /* 3-node face */
            {
              side_set_node_cnt_list[ss_elem_ndx[j]] = 3; /* 3 node object */
              side_set_node_list[node_pos+2] = 
                connect[connect_offset+tri3_table[side_num][2]-1];
            }
            else   /* 6-node face */
            {
              side_set_node_cnt_list[ss_elem_ndx[j]] = 6; /* 6 node object */
              side_set_node_list[node_pos+2] = 
                connect[connect_offset+tri3_table[side_num][2]-1];
              side_set_node_list[node_pos+3] = 
                connect[connect_offset+tri3_table[side_num][3]-1];
              side_set_node_list[node_pos+4] = 
                connect[connect_offset+tri3_table[side_num][4]-1];
              side_set_node_list[node_pos+5] = 
                connect[connect_offset+tri3_table[side_num][5]-1];
            }
          }
          else /* 2- or 3-node edge */
          {
            if (num_nodes_per_elem > 3)  /* 3-node edge */
            {
              side_set_node_cnt_list[ss_elem_ndx[j]] = 3; /* 3 node object */
              side_set_node_list[node_pos+2] = 
                connect[connect_offset+tri3_table[side_num][2]-1];
            }
          }
        }
        break;
      }
      case QUAD:
      {
        if (side_num+1 < 1 || side_num+1 > 4) /* side number range check */
        {
          exerrval = EX_BADPARAM;
          sprintf(errmsg,
                 "Error: Invalid quad edge number %d in file id %d",
                  side_num+1, exoid);
          ex_err("ex_get_side_set_node_list",errmsg,exerrval);
          free(connect);
          free(elem_blk_parms);
          free(elem_blk_ids);
          free(ss_elem_ndx);
          free(ss_elem_node_ndx);
          free(ss_parm_ndx);
          free(side_set_side_list);
          free(side_set_elem_list);
          return(EX_FATAL);
        }
        
        side_set_node_list[node_pos] = 
          connect[connect_offset+quad_table[side_num][0]-1];
        side_set_node_list[node_pos+1] = 
          connect[connect_offset+quad_table[side_num][1]-1];
        side_set_node_cnt_list[ss_elem_ndx[j]] = 2;   /* 2 node object */
        if (num_nodes_per_elem > 5)
        {
          side_set_node_cnt_list[ss_elem_ndx[j]] = 3; /* 3 node object */
          side_set_node_list[node_pos+2] = 
            connect[connect_offset+quad_table[side_num][2]-1];
        }
        break;
      }
      case SHELL:
      {
        if (side_num+1 < 1 || side_num+1 > 6) /* side number range check */
        {
          exerrval = EX_BADPARAM;
          sprintf(errmsg,
                 "Error: Invalid shell face number %d in file id %d",
                  side_num+1, exoid);
          ex_err("ex_get_side_set_node_list",errmsg,exerrval);
          free(connect);
          free(elem_blk_parms);
          free(elem_blk_ids);
          free(ss_elem_ndx);
          free(ss_elem_node_ndx);
          free(ss_parm_ndx);
          free(side_set_side_list);
          free(side_set_elem_list);
          return(EX_FATAL);
        }

        side_set_node_list[node_pos] = 
          connect[connect_offset+shell_table[side_num][0]-1];
        side_set_node_list[node_pos+1] = 
          connect[connect_offset+shell_table[side_num][1]-1];
        side_set_node_cnt_list[ss_elem_ndx[j]] = 2;   /* 2 node object */
        if (num_nodes_per_elem > 2) /*** KLUDGE for 2D shells ***/
        {
          if (side_num+1 <= 2)  /* 4-node face */
          {
            side_set_node_cnt_list[ss_elem_ndx[j]] = 4;   /* 4 node object */
            side_set_node_list[node_pos+2] = 
              connect[connect_offset+shell_table[side_num][2]-1];
            side_set_node_list[node_pos+3] = 
              connect[connect_offset+shell_table[side_num][3]-1];
          }
        }
        if (num_nodes_per_elem == 8)
        {
          if (side_num+1 <= 2)  /* 8-node face */
          {
            side_set_node_cnt_list[ss_elem_ndx[j]] = 8; /* 8 node object */
            side_set_node_list[node_pos+4] = 
              connect[connect_offset+shell_table[side_num][4]-1];
            side_set_node_list[node_pos+5] = 
              connect[connect_offset+shell_table[side_num][5]-1];
            side_set_node_list[node_pos+6] = 
              connect[connect_offset+shell_table[side_num][6]-1];
            side_set_node_list[node_pos+7] = 
              connect[connect_offset+shell_table[side_num][7]-1];
          }
          else 
          {
            side_set_node_cnt_list[ss_elem_ndx[j]] = 3; /* 3 node edge */
            side_set_node_list[node_pos+2] = 
              connect[connect_offset+shell_table[side_num][2]-1];
          }
        }
        break;
      }
      case TETRA:
      {
        if (side_num+1 < 1 || side_num+1 > 4) /* side number range check */
        {
          exerrval = EX_BADPARAM;
          sprintf(errmsg,
                 "Error: Invalid tetra face number %d in file id %d",
                  side_num+1, exoid);
          ex_err("ex_get_side_set_node_list",errmsg,exerrval);
          free(connect);
          free(elem_blk_parms);
          free(elem_blk_ids);
          free(ss_elem_ndx);
          free(ss_elem_node_ndx);
          free(ss_parm_ndx);
          free(side_set_side_list);
          free(side_set_elem_list);
          return(EX_FATAL);
        }

        side_set_node_list[node_pos] = 
          connect[connect_offset+tetra_table[side_num][0]-1];
        side_set_node_list[node_pos+1] = 
          connect[connect_offset+tetra_table[side_num][1]-1];
        side_set_node_list[node_pos+2] = 
          connect[connect_offset+tetra_table[side_num][2]-1];
        side_set_node_cnt_list[ss_elem_ndx[j]] = 3;   /* 3 node object */
        if (num_nodes_per_elem == 8)
        {
          side_set_node_cnt_list[ss_elem_ndx[j]] = 4; /* 4 node object */
          side_set_node_list[node_pos+3] = 
            connect[connect_offset+tetra_table[side_num][3]-1];
        }
        else if (num_nodes_per_elem > 8)
        {
          side_set_node_cnt_list[ss_elem_ndx[j]] = 6; /* 6 node object */
          side_set_node_list[node_pos+3] = 
            connect[connect_offset+tetra_table[side_num][3]-1];
          side_set_node_list[node_pos+4] = 
            connect[connect_offset+tetra_table[side_num][4]-1];
          side_set_node_list[node_pos+5] = 
            connect[connect_offset+tetra_table[side_num][5]-1];
        }
        break;
      }
      case WEDGE:
      {
        if (side_num+1 < 1 || side_num+1 > 5) /* side number range check */
        {
          exerrval = EX_BADPARAM;
          sprintf(errmsg,
                 "Error: Invalid wedge face number %d in file id %d",
                  side_num+1, exoid);
          ex_err("ex_get_side_set_node_list",errmsg,exerrval);
          free(connect);
          free(elem_blk_parms);
          free(elem_blk_ids);
          free(ss_elem_ndx);
          free(ss_elem_node_ndx);
          free(ss_parm_ndx);
          free(side_set_side_list);
          free(side_set_elem_list);
          return(EX_FATAL);
        }

        side_set_node_list[node_pos++] = 
          connect[connect_offset+wedge_table[side_num][0]-1];
        side_set_node_list[node_pos++] = 
          connect[connect_offset+wedge_table[side_num][1]-1];
        side_set_node_list[node_pos++] = 
          connect[connect_offset+wedge_table[side_num][2]-1];

        if (wedge_table[side_num][3] == 0) { /* degenerate side? */
          side_set_node_cnt_list[ss_elem_ndx[j]] = 3;   /* 3 node side */
        }
        else
        {
          side_set_node_list[node_pos++] =
            connect[connect_offset+wedge_table[side_num][3]-1];
          side_set_node_cnt_list[ss_elem_ndx[j]] = 4;   /* 4 node side */
        }


        if (num_nodes_per_elem > 6)
        {
          side_set_node_cnt_list[ss_elem_ndx[j]] = 8; /* 8 node object */
          side_set_node_list[node_pos++] = 
            connect[connect_offset+wedge_table[side_num][4]-1];
          side_set_node_list[node_pos++] = 
            connect[connect_offset+wedge_table[side_num][5]-1];
          side_set_node_list[node_pos++] = 
            connect[connect_offset+wedge_table[side_num][6]-1];

          if (wedge_table[side_num][7] == 0) /* degenerate side? */
            side_set_node_cnt_list[ss_elem_ndx[j]] = 6;   /* 6 node side */
          else
          {
            side_set_node_list[node_pos++] =
              connect[connect_offset+wedge_table[side_num][7]-1];
            side_set_node_cnt_list[ss_elem_ndx[j]] = 8;   /* 8 node side */
          }
        }
        break;
      }
      case PYRAMID:
      {
        if (side_num+1 < 1 || side_num+1 > 5) /* side number range check */
        {
          exerrval = EX_BADPARAM;
          sprintf(errmsg,
                 "Error: Invalid pyramid face number %d in file id %d",
                  side_num+1, exoid);
          ex_err("ex_get_side_set_node_list",errmsg,exerrval);
          free(connect);
          free(elem_blk_parms);
          free(elem_blk_ids);
          free(ss_elem_ndx);
          free(ss_elem_node_ndx);
          free(ss_parm_ndx);
          free(side_set_side_list);
          free(side_set_elem_list);
          return(EX_FATAL);
        }

        side_set_node_list[node_pos++] = 
          connect[connect_offset+pyramid_table[side_num][0]-1];
        side_set_node_list[node_pos++] = 
          connect[connect_offset+pyramid_table[side_num][1]-1];
        side_set_node_list[node_pos++] = 
          connect[connect_offset+pyramid_table[side_num][2]-1];

        if (pyramid_table[side_num][3] == 0) { /* degenerate side? */
          side_set_node_cnt_list[ss_elem_ndx[j]] = 3;   /* 3 node side */
        }
        else
        {
          side_set_node_list[node_pos++] =
            connect[connect_offset+pyramid_table[side_num][3]-1];
          side_set_node_cnt_list[ss_elem_ndx[j]] = 4;   /* 4 node side */
        }


        if (num_nodes_per_elem > 5)
        {
          side_set_node_cnt_list[ss_elem_ndx[j]] = 8; /* 8 node object */
          side_set_node_list[node_pos++] = 
            connect[connect_offset+pyramid_table[side_num][4]-1];
          side_set_node_list[node_pos++] = 
            connect[connect_offset+pyramid_table[side_num][5]-1];
          side_set_node_list[node_pos++] = 
            connect[connect_offset+pyramid_table[side_num][6]-1];

          if (pyramid_table[side_num][7] == 0) /* degenerate side? */
            side_set_node_cnt_list[ss_elem_ndx[j]] = 6;   /* 6 node side */
          else
          {
            side_set_node_list[node_pos++] =
              connect[connect_offset+pyramid_table[side_num][7]-1];
            side_set_node_cnt_list[ss_elem_ndx[j]] = 8;   /* 8 node side */
          }
        }
        break;
      }
      case HEX:
      {
        if (side_num+1 < 1 || side_num+1 > 6) /* side number range check */
        {
          exerrval = EX_BADPARAM;
          sprintf(errmsg,
                 "Error: Invalid hex face number %d in file id %d",
                  side_num+1, exoid);
          ex_err("ex_get_side_set_node_list",errmsg,exerrval);
          free(connect);
          free(elem_blk_parms);
          free(elem_blk_ids);
          free(ss_elem_ndx);
          free(ss_elem_node_ndx);
          free(ss_parm_ndx);
          free(side_set_side_list);
          free(side_set_elem_list);
          return(EX_FATAL);
        }

        side_set_node_list[node_pos] = 
          connect[connect_offset+hex_table[side_num][0]-1];
        side_set_node_list[node_pos+1] = 
          connect[connect_offset+hex_table[side_num][1]-1];
        side_set_node_list[node_pos+2] = 
          connect[connect_offset+hex_table[side_num][2]-1];
        side_set_node_list[node_pos+3] = 
          connect[connect_offset+hex_table[side_num][3]-1];
        side_set_node_cnt_list[ss_elem_ndx[j]] = 4;   /* 4 node object */
        if (num_nodes_per_elem > 12)   /* more nodes than HEXSHELL */
        {
          side_set_node_cnt_list[ss_elem_ndx[j]] = 8; /* 8 node object */
          side_set_node_list[node_pos+4] = 
            connect[connect_offset+hex_table[side_num][4]-1];
          side_set_node_list[node_pos+5] = 
            connect[connect_offset+hex_table[side_num][5]-1];
          side_set_node_list[node_pos+6] = 
            connect[connect_offset+hex_table[side_num][6]-1];
          side_set_node_list[node_pos+7] = 
            connect[connect_offset+hex_table[side_num][7]-1];
        }
        if (num_nodes_per_elem == 27)                 /* 27-node brick */
        {
          side_set_node_cnt_list[ss_elem_ndx[j]] = 9; /* 9 node object */
          side_set_node_list[node_pos+8] = 
            connect[connect_offset+hex_table[side_num][8]-1];
        }
        break;
      }
      default:
      {
        exerrval = EX_BADPARAM;
        sprintf(errmsg,
               "Error: %s is an unsupported element type",
                elem_blk_parms[ss_parm_ndx[ss_elem_ndx[j]]].elem_type);
        ex_err("ex_get_side_set_node_list",errmsg,exerrval);
        return(EX_FATAL);
      }
    }
  }


  /* All done: release connectivity array space, element block ids array,
     element block parameters array, and side set element index array */
  free(connect);
  free(ss_parm_ndx);
  free(elem_blk_ids);
  free(elem_blk_parms);
  free(ss_elem_ndx);
  free(ss_elem_node_ndx);
  free(side_set_side_list);
  free(side_set_elem_list);

  return(EX_NOERR);
}