/* 
 * @HEADER
 *
 * ***********************************************************************
 *
 *  Zoltan Toolkit for Load-balancing, Partitioning, Ordering and Coloring
 *                  Copyright 2012 Sandia Corporation
 *
 * Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
 * 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:
 *
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. Neither the name of the Corporation nor the names of the
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "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 SANDIA CORPORATION OR THE
 * 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.
 *
 * Questions? Contact Karen Devine	kddevin@sandia.gov
 *                    Erik Boman	egboman@sandia.gov
 *
 * ***********************************************************************
 *
 * @HEADER
 */


#include <stdio.h>
#include <stdlib.h>

#include "zoltan_dd_const.h"


#ifdef __cplusplus
/* if C++, define the rest of this header file as extern C */
extern "C" {
#endif


/*  NOTE: See file, README, for associated documentation. (RTH) */


static unsigned int dd_hash_user (
  ZOLTAN_ID_PTR gid, int gid_length, 
  unsigned int nproc,
  void *data,
  ZOLTAN_HASH_FN *fn)
{
  return (*fn)(gid, gid_length, nproc);
}

/*************  Zoltan_DD_Set_Hash_Fn()  ***********************/


int Zoltan_DD_Set_Hash_Fn (
 Zoltan_DD_Directory *dd,              /* directory state information */
 ZOLTAN_HASH_FN *hash)
{
   char *yo = "Zoltan_DD_Set_Hash_Fn";

   /* input sanity checking */
   if (dd == NULL || hash == NULL)  {
      ZOLTAN_PRINT_ERROR (0, yo, "Invalid input argument");
      return ZOLTAN_FATAL ;
   }

   dd->hash = (DD_Hash_fn*)dd_hash_user;
   dd->hashdata = NULL;
   dd->hashfn = hash;
   dd->cleanup = (DD_Cleanup_fn*) NULL; 

   if (dd->debug_level > 0)
      ZOLTAN_PRINT_INFO (dd->my_proc, yo, "Successful");

   return ZOLTAN_OK;
}


#ifdef __cplusplus
} /* closing bracket for extern "C" */
#endif
