/* Callbacks for pointers to `void'.
 * Copyright (C) 1996  Free Software Foundation, Inc.
 * 
 * Author: Albin L. Jones <Albin.L.Jones@Dartmouth.EDU>
 * Created: Sat Feb 10 22:04:38 EST 1996
 * Updated: Sun Feb 11 01:09:34 EST 1996
 * Serial: 96.02.11.03
 * 
 * This file is part of the GNU Objective C Class Library.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 * 
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 * 
 */ 

/**** Included Headers *******************************************************/

#include <stdlib.h>
#include <objects/callbacks.h>

/**** Type, Constant, and Macro Definitions **********************************/

objects_callbacks_t objects_callbacks_for_void_p = 
{
  (objects_hash_func_t) objects_void_p_hash,
  (objects_compare_func_t) objects_void_p_compare,
  (objects_is_equal_func_t) objects_void_p_is_equal,
  (objects_retain_func_t) objects_void_p_retain,
  (objects_release_func_t) objects_void_p_release,
  0
};

objects_callbacks_t objects_callbacks_for_owned_void_p = 
{
  (objects_hash_func_t) objects_owned_void_p_hash,
  (objects_compare_func_t) objects_owned_void_p_compare,
  (objects_is_equal_func_t) objects_owned_void_p_is_equal,
  (objects_retain_func_t) objects_owned_void_p_retain,
  (objects_release_func_t) objects_owned_void_p_release,
  0
};

/**** Function Implementations ***********************************************/

size_t
objects_void_p_hash(void *cptr)
{
  return ((size_t) cptr)/4;
}

int
objects_void_p_compare(void *cptr, void *dptr)
{
  if (cptr == dptr)
    return 0;
  else if (cptr < dptr)
    return -1;
  else /* if (cptr > dptr) */
    return 1;
}

int
objects_void_p_is_equal(register void *cptr, register void *dptr)
{
  return (cptr == dptr);
}

void *
objects_void_p_retain(void *cptr)
{
  return cptr;
}

void
objects_void_p_release(void *cptr)
{
  return;
}

size_t
objects_owned_void_p_hash(void *cptr)
{
  /* We divide by 4 because many machines align
   * memory on word boundaries. */
  return ((size_t) cptr)/4;
}

int
objects_owned_void_p_compare(void *cptr, void *dptr)
{
  if (cptr == dptr)
    return 0;
  else if (cptr < dptr)
    return -1;
  else /* if (cptr > dptr) */
    return 1;
}

int
objects_owned_void_p_is_equal(register void *cptr, register void *dptr)
{
  return (cptr == dptr);
}

void *
objects_owned_void_p_retain(void *cptr)
{
  return cptr;
}

void
objects_owned_void_p_release(void *cptr)
{
  free(cptr);
  return;
}