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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@948 72102866-910b-0410-8b05-ffd578937521
174 lines
6.4 KiB
C
174 lines
6.4 KiB
C
/* Handling various types in a uniform manner.
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* Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
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*
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* Author: Albin L. Jones <Albin.L.Jones@Dartmouth.EDU>
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* Created: Sun Oct 9 13:18:50 EDT 1994
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* Updated: Sun Feb 11 01:46:03 EST 1996
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* Serial: 96.02.11.01
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*
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* This file is part of the GNU Objective C Class Library.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef __callbacks_h_OBJECTS_INCLUDE
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#define __callbacks_h_OBJECTS_INCLUDE 1
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/**** Included Headers *******************************************************/
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#include <stdlib.h>
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/**** Type, Constant, and Macro Definitions **********************************/
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typedef size_t (*objects_hash_func_t) (const void *, const void *);
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typedef int (*objects_compare_func_t) (const void *, const void *,
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const void *);
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typedef int (*objects_is_equal_func_t) (const void *, const void *,
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const void *);
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typedef void *(*objects_retain_func_t) (const void *, const void *);
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typedef void (*objects_release_func_t) (void *, const void *);
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typedef void *(*objects_describe_func_t) (const void *, const void *);
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typedef struct _objects_callbacks objects_callbacks_t;
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struct _objects_callbacks
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{
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objects_hash_func_t hash;
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objects_compare_func_t compare;
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objects_is_equal_func_t is_equal;
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objects_retain_func_t retain;
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objects_release_func_t release;
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objects_describe_func_t describe;
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const void *not_an_item_marker;
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};
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/** Callbacks for various types **/
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extern const objects_callbacks_t objects_callbacks_for_int;
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extern const objects_callbacks_t objects_callbacks_for_char_p;
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extern const objects_callbacks_t objects_callbacks_for_void_p;
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extern const objects_callbacks_t objects_callbacks_for_owned_void_p;
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extern const objects_callbacks_t objects_callbacks_for_int_p;
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extern const objects_callbacks_t objects_callbacks_for_id;
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/* FIXME: I need to figure out what each of these should be. Hmmm? */
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extern const void *objects_not_an_int_marker;
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extern const void *objects_not_a_char_p_marker;
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extern const void *objects_not_a_void_p_marker;
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extern const void *objects_not_an_int_p_marker;
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extern const void *objects_not_an_id_marker;
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/* Change this if you need different default callbacks. */
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extern objects_callbacks_t __objects_callbacks_standard;
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/**** Function Prototypes ****************************************************/
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/** Generic callbacks **/
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/* Returns `__objects_callbacks_standard', defined above. */
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objects_callbacks_t
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objects_callbacks_standard (void);
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/** Standardizing callbacks **/
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objects_callbacks_t
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objects_callbacks_standardize (objects_callbacks_t callbacks);
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/** Using callbacks **/
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size_t objects_hash (objects_callbacks_t callbacks,
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const void *thing,
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const void *user_data);
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int objects_compare (objects_callbacks_t callbacks,
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const void *thing1,
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const void *thing2,
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const void *user_data);
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int objects_is_equal (objects_callbacks_t callbacks,
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const void *thing1,
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const void *thing2,
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const void *user_data);
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void *objects_retain (objects_callbacks_t callbacks,
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const void *thing,
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const void *user_data);
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void objects_release (objects_callbacks_t callbacks,
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void *thing,
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const void *user_data);
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/* FIXME: Decide what to do with this describe stuff. We'd really like
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* them to return Strings? Or would we rather they be `char *'s?
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* Or something else? */
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void *objects_describe (objects_callbacks_t callbacks,
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const void *thing,
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const void *user_data);
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const void *objects_not_an_item_marker (objects_callbacks_t);
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/** Specific callback functions **/
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/* For `void *' */
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size_t objects_void_p_hash(const void *ptr);
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int objects_void_p_compare(const void *ptr, const void *qtr);
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int objects_void_p_is_equal(const void *ptr, const void *qtr);
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const void *objects_void_p_retain(const void *ptr);
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void objects_void_p_release(const void *ptr);
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const void *objects_void_p_describe(const void *ptr);
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/* For `void *' */
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size_t objects_owned_void_p_hash(const void *ptr);
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int objects_owned_void_p_compare(const void *ptr, const void *qtr);
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int objects_owned_void_p_is_equal(const void *ptr, const void *qtr);
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const void *objects_owned_void_p_retain(const void *ptr);
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void objects_owned_void_p_release(const void *ptr);
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const void *objects_owned_void_p_describe(const void *ptr);
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/* For `int' */
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size_t objects_int_hash(const void *i);
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int objects_int_compare(const void *i, const void *j);
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int objects_int_is_equal(const void *i, const void *j);
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const void *objects_int_retain(const void *i);
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void objects_int_release(const void *i);
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const void *objects_int_describe(const void *i);
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/* For `int *' */
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size_t objects_int_p_hash(const void *iptr);
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int objects_int_p_compare(const void *iptr, const void *jptr);
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int objects_int_p_is_equal(const void *iptr, const void *jptr);
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const void *objects_int_p_retain(const void *iptr);
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void objects_int_p_release(const void *iptr);
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const void *objects_int_p_describe(const void *iptr);
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/* For `char *' */
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size_t objects_char_p_hash(const void *cptr);
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int objects_char_p_compare(const void *cptr, const void *dptr);
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int objects_char_p_is_equal(const void *cptr, const void *dptr);
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const void *objects_char_p_retain(const void *cptr);
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void objects_char_p_release(const void *cptr);
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const void *objects_char_p_describe(const void *cptr);
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/* For `id' */
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size_t objects_id_hash(const void *obj);
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int objects_id_compare(const void *obj, const void *jbo);
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int objects_id_is_equal(const void *obj, const void *jbo);
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const void *objects_id_retain(const void *obj);
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void objects_id_release(const void *obj);
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const void *objects_id_describe(const void *obj);
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#endif /* __callbacks_h_OBJECTS_INCLUDE */
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