1 /* Lisp interface to hash tables -- include file.
2 Copyright (C) 1995, 1996 Ben Wing.
4 This file is part of XEmacs.
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Synched up with: Not in FSF. */
23 #ifndef _XEMACS_ELHASH_H_
24 #define _XEMACS_ELHASH_H_
26 DECLARE_LRECORD (hash_table, struct Lisp_Hash_Table);
28 #define XHASH_TABLE(x) XRECORD (x, hash_table, struct Lisp_Hash_Table)
29 #define XSETHASH_TABLE(x, p) XSETRECORD (x, p, hash_table)
30 #define HASH_TABLEP(x) RECORDP (x, hash_table)
31 #define CHECK_HASH_TABLE(x) CHECK_RECORD (x, hash_table)
32 #define CONCHECK_HASH_TABLE(x) CONCHECK_RECORD (x, hash_table)
34 enum hash_table_weakness
38 HASH_TABLE_VALUE_WEAK,
39 HASH_TABLE_KEY_CAR_WEAK,
40 HASH_TABLE_VALUE_CAR_WEAK,
51 extern const struct lrecord_description hash_table_description[];
53 EXFUN (Fcopy_hash_table, 1);
54 EXFUN (Fhash_table_count, 1);
60 typedef unsigned long hashcode_t;
61 typedef int (*hash_table_test_function_t) (Lisp_Object obj1, Lisp_Object obj2);
62 typedef unsigned long (*hash_table_hash_function_t) (Lisp_Object obj);
63 typedef int (*maphash_function_t) (Lisp_Object key, Lisp_Object value,
66 struct Lisp_Hash_Table;
68 Lisp_Object make_general_lisp_hash_table (enum hash_table_test test,
71 double rehash_threshold,
72 enum hash_table_weakness weakness);
74 Lisp_Object make_lisp_hash_table (size_t size,
75 enum hash_table_weakness weakness,
76 enum hash_table_test test);
78 void elisp_maphash (maphash_function_t function,
79 Lisp_Object hash_table, void *extra_arg);
81 void elisp_map_remhash (maphash_function_t predicate,
82 Lisp_Object hash_table, void *extra_arg);
84 int finish_marking_weak_hash_tables (void);
85 void prune_weak_hash_tables (void);
87 void reorganize_hash_table (struct Lisp_Hash_Table *ht);
89 #endif /* _XEMACS_ELHASH_H_ */