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/* Handling various types in a uniform manner.
* Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
*
* Author: Albin L. Jones <Albin.L.Jones@Dartmouth.EDU>
* Created: Sun Oct 9 13:14:41 EDT 1994
* Updated: Mon Mar 11 02:17:32 EST 1996
* Serial: 96.03.11.08
*
* This file is part of the GNUstep Base 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 <Foundation/NSString.h>
#include <gnustep/base/o_cbs.h>
/**** Type, Constant, and Macro Definitions **********************************/
/* WARNING: Don't change this unless you know what you're getting into! */
static o_callbacks_t ___o_callbacks_standard =
{
(o_hash_func_t) o_non_owned_void_p_hash,
(o_compare_func_t) o_non_owned_void_p_compare,
(o_is_equal_func_t) o_non_owned_void_p_is_equal,
(o_retain_func_t) o_non_owned_void_p_retain,
(o_release_func_t) o_non_owned_void_p_release,
(o_describe_func_t) o_non_owned_void_p_describe,
0
};
/**** Function Implementations ***********************************************/
/** Getting the standard callbacks... **/
o_callbacks_t
o_callbacks_standard(void)
{
return ___o_callbacks_standard;
}
/** Standardizing callbacks... **/
o_callbacks_t
o_callbacks_standardize(o_callbacks_t callbacks)
{
if (callbacks.hash == 0)
callbacks.hash = o_callbacks_standard().hash;
if (callbacks.compare == 0 && callbacks.is_equal == 0)
{
callbacks.compare = o_callbacks_standard().compare;
callbacks.is_equal = o_callbacks_standard().is_equal;
}
if (callbacks.retain == 0)
callbacks.retain = o_callbacks_standard().retain;
if (callbacks.release == 0)
callbacks.release = o_callbacks_standard().release;
return callbacks;
}
/** Using callbacks... **/
size_t
o_hash(o_callbacks_t callbacks,
const void *thing,
void *user_data)
{
if (callbacks.hash != 0)
return callbacks.hash(thing, user_data);
else
return o_callbacks_standard().hash(thing, user_data);
}
int
o_compare(o_callbacks_t callbacks,
const void *thing1,
const void *thing2,
void *user_data)
{
if (callbacks.compare != 0)
return callbacks.compare(thing1, thing2, user_data);
else if (callbacks.is_equal != 0)
return !(callbacks.is_equal(thing1, thing2, user_data));
else
return o_callbacks_standard().compare(thing1, thing2, user_data);
}
int
o_is_equal(o_callbacks_t callbacks,
const void *thing1,
const void *thing2,
void *user_data)
{
if (callbacks.is_equal != 0)
return callbacks.is_equal(thing1, thing2, user_data);
else if (callbacks.compare != 0)
return !(callbacks.compare(thing1, thing2, user_data));
else
return o_callbacks_standard().is_equal(thing1, thing2, user_data);
}
const void *
o_retain(o_callbacks_t callbacks,
const void *thing,
void *user_data)
{
if (callbacks.retain != 0)
return callbacks.retain(thing, user_data);
else
return o_callbacks_standard().retain(thing, user_data);
}
void
o_release(o_callbacks_t callbacks,
void *thing,
void *user_data)
{
if (callbacks.release != 0)
callbacks.release (thing, user_data);
else
o_callbacks_standard().release(thing, user_data);
return;
}
NSString *
o_describe(o_callbacks_t callbacks,
const void *thing,
void *user_data)
{
if (callbacks.release != 0)
return callbacks.describe(thing, user_data);
else
return o_callbacks_standard().describe(thing, user_data);
}
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