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New file from Albin Jones
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Source/objects/hash.h
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Source/objects/hash.h
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/* A hash table for use with Libobjects.
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* Copyright (C) 1993, 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: ??? ??? ?? ??:??:?? ??? 1993
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* Updated: Sat Feb 10 15:35:37 EST 1996
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* Serial: 96.02.10.01
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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 __hash_h_OBJECTS_INCLUDE
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#define __hash_h_OBJECTS_INCLUDE 1
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/**** Included Headers *******************************************************/
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#include <objects/allocs.h>
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#include <objects/callbacks.h>
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/**** Type, Constant, and Macro Definitions **********************************/
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typedef struct _objects_hash objects_hash_t;
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typedef struct _objects_hash_bucket objects_hash_bucket_t;
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typedef struct _objects_hash_node objects_hash_node_t;
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typedef struct _objects_hash_enumerator objects_hash_enumerator_t;
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struct _objects_hash_node
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{
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objects_hash_t *hash;
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objects_hash_bucket_t *bucket;
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objects_hash_node_t *next_in_bucket;
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objects_hash_node_t *prev_in_bucket;
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objects_hash_node_t *next_in_hash;
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objects_hash_node_t *prev_in_hash;
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void *element;
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};
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struct _objects_hash_bucket
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{
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size_t node_count;
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size_t element_count;
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objects_hash_node_t *first_node;
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};
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struct _objects_hash
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{
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int magic;
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size_t number;
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char *name;
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void *extra;
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objects_callbacks_t extra_callbacks;
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objects_allocs_t allocs;
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/* Callbacks for the items in the hash. */
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objects_callbacks_t callbacks;
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/* Internal hash counters. */
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size_t bucket_count; /* How many types of items? */
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size_t node_count; /* How many items? */
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size_t element_count; /* How many elements? */
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/* Places to start looking for elements. */
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objects_hash_bucket_t *buckets;
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objects_hash_node_t *first_node;
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};
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struct _objects_hash_enumerator
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{
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objects_hash_t *hash;
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objects_hash_node_t *node;
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};
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/**** Function Prototypes ****************************************************/
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/** Basics **/
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#include <objects/hash-basics.h>
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#include <objects/hash-callbacks.h>
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/** Hashing **/
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size_t objects_hash_hash (objects_hash_t * hash);
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/** Creating **/
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objects_hash_t * objects_hash_alloc (void);
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objects_hash_t * objects_hash_alloc_with_allocs (objects_allocs_t alloc);
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objects_hash_t * objects_hash_with_callbacks (objects_callbacks_t callbacks);
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objects_hash_t * objects_hash_with_allocs (objects_allocs_t allocs);
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objects_hash_t * objects_hash_with_allocs_with_callbacks (objects_allocs_t allocs, objects_callbacks_t callbacks);
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objects_hash_t * objects_hash_of_char_p (void);
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objects_hash_t * objects_hash_of_void_p (void);
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objects_hash_t * objects_hash_of_owned_void_p (void);
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objects_hash_t * objects_hash_of_int (void);
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objects_hash_t * objects_hash_of_id (void);
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/** Initializing **/
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objects_hash_t * objects_hash_init (objects_hash_t * hash);
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objects_hash_t * objects_hash_init_with_callbacks (objects_hash_t * hash, objects_callbacks_t callbacks);
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objects_hash_t * objects_hash_init_with_hash (objects_hash_t * hash, objects_hash_t * other_hash);
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/** Copying **/
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objects_hash_t * objects_hash_copy (objects_hash_t * old_hash);
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objects_hash_t * objects_hash_copy_with_allocs (objects_hash_t * hash, objects_allocs_t new_allocs);
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/** Mapping **/
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/* WARNING: The mapping function FCN must be one-to-one on elements of
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* HASH. I.e., for reasons of efficiency, `objects_hash_map_elements()'
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* makes no provision for the possibility that FCN maps two unequal
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* elements of HASH to the same (or equal) elements. The better way
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* to handle functions that aren't one-to-one is to create a new hash
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* and transform the elements of the first to create the elements of
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* the second. */
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objects_hash_t * objects_hash_map_elements (objects_hash_t * hash, void *(*fcn) (void *, void *), void *user_data);
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/** Destroying **/
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void objects_hash_dealloc (objects_hash_t * hash);
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/** Comparing **/
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int objects_hash_contains_hash (objects_hash_t * hash, objects_hash_t * other_hash);
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int objects_hash_intersects_hash (objects_hash_t * hash, objects_hash_t * other_hash);
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int objects_hash_is_equal_to_hash (objects_hash_t * hash, objects_hash_t * other_hash);
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/** Adding **/
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void *objects_hash_add_element_known_absent (objects_hash_t * hash, void *element);
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void *objects_hash_add_element (objects_hash_t * hash, void *element);
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void *objects_hash_add_element_if_absent (objects_hash_t * hash, void *element);
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/** Replacing **/
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void objects_hash_replace_element (objects_hash_t * hash, void *element);
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/** Removing **/
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void objects_hash_remove_element (objects_hash_t * hash, void *element);
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/** Emptying **/
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void objects_hash_empty (objects_hash_t * hash);
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/** Searching **/
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void *objects_hash_any_element (objects_hash_t * hash);
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int objects_hash_contains_element (objects_hash_t * hash, void *element);
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void *objects_hash_element (objects_hash_t * hash, void *element);
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void **objects_hash_all_elements (objects_hash_t * hash);
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/** Enumerating **/
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objects_hash_enumerator_t objects_hash_enumerator (objects_hash_t * hash);
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int objects_hash_enumerator_next_element (objects_hash_enumerator_t *enumerator, void **element);
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/** Statistics **/
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int objects_hash_is_empty (objects_hash_t * hash);
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size_t objects_hash_count (objects_hash_t * hash);
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size_t objects_hash_capacity (objects_hash_t * hash);
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int objects_hash_check (objects_hash_t * hash);
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/** Miscellaneous **/
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size_t objects_hash_resize (objects_hash_t * hash, size_t new_capacity);
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size_t objects_hash_rightsize (objects_hash_t * hash);
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objects_hash_t * objects_hash_intersect_hash (objects_hash_t * hash, objects_hash_t * other_hash);
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objects_hash_t * objects_hash_minus_hash (objects_hash_t * hash, objects_hash_t * other_hash);
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objects_hash_t * objects_hash_union_hash (objects_hash_t * hash, objects_hash_t * other_hash);
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#endif /* __hash_h_OBJECTS_INCLUDE */
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