lib/libc/db/hash/extern.h

   1 /*      $NetBSD: extern.h,v 1.9 2008/08/26 21:18:38 joerg Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)extern.h    8.4 (Berkeley) 6/16/94
  32  */
  33
  34 BUFHEAD *__add_ovflpage(HTAB *, BUFHEAD *);
  35 int      __addel(HTAB *, BUFHEAD *, const DBT *, const DBT *);
  36 int      __big_delete(HTAB *, BUFHEAD *);
  37 int      __big_insert(HTAB *, BUFHEAD *, const DBT *, const DBT *);
  38 int      __big_keydata(HTAB *, BUFHEAD *, DBT *, DBT *, int);
  39 int      __big_return(HTAB *, BUFHEAD *, int, DBT *, int);
  40 int      __big_split(HTAB *, BUFHEAD *, BUFHEAD *, BUFHEAD *,
  41                 int, uint32_t, SPLIT_RETURN *);
  42 int      __buf_free(HTAB *, int, int);
  43 void     __buf_init(HTAB *, u_int);
  44 uint32_t         __call_hash(HTAB *, char *, int);
  45 int      __delpair(HTAB *, BUFHEAD *, int);
  46 int      __expand_table(HTAB *);
  47 int      __find_bigpair(HTAB *, BUFHEAD *, int, char *, int);
  48 uint16_t         __find_last_page(HTAB *, BUFHEAD **);
  49 void     __free_ovflpage(HTAB *, BUFHEAD *);
  50 BUFHEAD *__get_buf(HTAB *, uint32_t, BUFHEAD *, int);
  51 int      __get_page(HTAB *, char *, uint32_t, int, int, int);
  52 int      __ibitmap(HTAB *, int, int, int);
  53 uint32_t         __log2(uint32_t);
  54 int      __put_page(HTAB *, char *, uint32_t, int, int);
  55 void     __reclaim_buf(HTAB *, BUFHEAD *);
  56 int      __split_page(HTAB *, uint32_t, uint32_t);
  57
  58 /* Default hash routine. */
  59 extern uint32_t (*__default_hash)(const void *, size_t);
  60
  61 #ifdef HASH_STATISTICS
  62 extern int hash_accesses, hash_collisions, hash_expansions, hash_overflows;
  63 #endif