]> git.saurik.com Git - apple/libc.git/blob - db/hash/extern.h
3f25acc2796ab3f497816b175fbfc1b34ac60af6
[apple/libc.git] / db / hash / extern.h
1 /*
2 * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_LICENSE_HEADER_START@
5 *
6 * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
7 *
8 * This file contains Original Code and/or Modifications of Original Code
9 * as defined in and that are subject to the Apple Public Source License
10 * Version 2.0 (the 'License'). You may not use this file except in
11 * compliance with the License. Please obtain a copy of the License at
12 * http://www.opensource.apple.com/apsl/ and read it before using this
13 * file.
14 *
15 * The Original Code and all software distributed under the License are
16 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
17 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
18 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
20 * Please see the License for the specific language governing rights and
21 * limitations under the License.
22 *
23 * @APPLE_LICENSE_HEADER_END@
24 */
25 /*-
26 * Copyright (c) 1991, 1993, 1994
27 * The Regents of the University of California. All rights reserved.
28 *
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
31 * are met:
32 * 1. Redistributions of source code must retain the above copyright
33 * notice, this list of conditions and the following disclaimer.
34 * 2. Redistributions in binary form must reproduce the above copyright
35 * notice, this list of conditions and the following disclaimer in the
36 * documentation and/or other materials provided with the distribution.
37 * 3. All advertising materials mentioning features or use of this software
38 * must display the following acknowledgement:
39 * This product includes software developed by the University of
40 * California, Berkeley and its contributors.
41 * 4. Neither the name of the University nor the names of its contributors
42 * may be used to endorse or promote products derived from this software
43 * without specific prior written permission.
44 *
45 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
46 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
47 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
48 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
49 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
50 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
51 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
52 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
53 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
54 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * SUCH DAMAGE.
56 *
57 * @(#)extern.h 8.4 (Berkeley) 6/16/94
58 * $FreeBSD: src/lib/libc/db/hash/extern.h,v 1.3 2002/03/22 09:18:22 obrien Exp $
59 */
60
61 BUFHEAD *__add_ovflpage(HTAB *, BUFHEAD *);
62 int __addel(HTAB *, BUFHEAD *, const DBT *, const DBT *);
63 int __big_delete(HTAB *, BUFHEAD *);
64 int __big_insert(HTAB *, BUFHEAD *, const DBT *, const DBT *);
65 int __big_keydata(HTAB *, BUFHEAD *, DBT *, DBT *, int);
66 int __big_return(HTAB *, BUFHEAD *, int, DBT *, int);
67 int __big_split(HTAB *, BUFHEAD *, BUFHEAD *, BUFHEAD *,
68 int, u_int32_t, SPLIT_RETURN *);
69 int __buf_free(HTAB *, int, int);
70 void __buf_init(HTAB *, int);
71 u_int32_t __call_hash(HTAB *, char *, int);
72 int __delpair(HTAB *, BUFHEAD *, int);
73 int __expand_table(HTAB *);
74 int __find_bigpair(HTAB *, BUFHEAD *, int, char *, int);
75 u_int16_t __find_last_page(HTAB *, BUFHEAD **);
76 void __free_ovflpage(HTAB *, BUFHEAD *);
77 BUFHEAD *__get_buf(HTAB *, u_int32_t, BUFHEAD *, int);
78 int __get_page(HTAB *, char *, u_int32_t, int, int, int);
79 int __ibitmap(HTAB *, int, int, int);
80 u_int32_t __log2(u_int32_t);
81 int __put_page(HTAB *, char *, u_int32_t, int, int);
82 void __reclaim_buf(HTAB *, BUFHEAD *);
83 int __split_page(HTAB *, u_int32_t, u_int32_t);
84
85 /* Default hash routine. */
86 extern u_int32_t (*__default_hash)(const void *, size_t);
87
88 #ifdef HASH_STATISTICS
89 extern int hash_accesses, hash_collisions, hash_expansions, hash_overflows;
90 #endif