db.1.85/hash/extern.h

   1 /*-
   2  * Copyright (c) 1991, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)extern.h    8.4 (Berkeley) 6/16/94
  34  */
  35
  36 BUFHEAD *__add_ovflpage __P((HTAB *, BUFHEAD *));
  37 int      __addel __P((HTAB *, BUFHEAD *, const DBT *, const DBT *));
  38 int      __big_delete __P((HTAB *, BUFHEAD *));
  39 int      __big_insert __P((HTAB *, BUFHEAD *, const DBT *, const DBT *));
  40 int      __big_keydata __P((HTAB *, BUFHEAD *, DBT *, DBT *, int));
  41 int      __big_return __P((HTAB *, BUFHEAD *, int, DBT *, int));
  42 int      __big_split __P((HTAB *, BUFHEAD *, BUFHEAD *, BUFHEAD *,
  43                 int, u_int32_t, SPLIT_RETURN *));
  44 int      __buf_free __P((HTAB *, int, int));
  45 void     __buf_init __P((HTAB *, int));
  46 u_int32_t        __call_hash __P((HTAB *, char *, int));
  47 int      __delpair __P((HTAB *, BUFHEAD *, int));
  48 int      __expand_table __P((HTAB *));
  49 int      __find_bigpair __P((HTAB *, BUFHEAD *, int, char *, int));
  50 u_int16_t        __find_last_page __P((HTAB *, BUFHEAD **));
  51 void     __free_ovflpage __P((HTAB *, BUFHEAD *));
  52 BUFHEAD *__get_buf __P((HTAB *, u_int32_t, BUFHEAD *, int));
  53 int      __get_page __P((HTAB *, char *, u_int32_t, int, int, int));
  54 int      __ibitmap __P((HTAB *, int, int, int));
  55 u_int32_t        __log2 __P((u_int32_t));
  56 int      __put_page __P((HTAB *, char *, u_int32_t, int, int));
  57 void     __reclaim_buf __P((HTAB *, BUFHEAD *));
  58 int      __split_page __P((HTAB *, u_int32_t, u_int32_t));
  59
  60 /* Default hash routine. */
  61 extern u_int32_t (*__default_hash) __P((const void *, size_t));
  62
  63 #ifdef HASH_STATISTICS
  64 extern int hash_accesses, hash_collisions, hash_expansions, hash_overflows;
  65 #endif