lib/libc/citrus/citrus_hash.h

   1 /*      $NetBSD: citrus_hash.h,v 1.3 2004/01/02 21:49:35 itojun Exp $   */
   2
   3 /*-
   4  * Copyright (c)2003 Citrus Project,
   5  * 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  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #ifndef _CITRUS_HASH_H_
  30 #define _CITRUS_HASH_H_
  31
  32 #define _CITRUS_HASH_ENTRY(type) LIST_ENTRY(type)
  33 #define _CITRUS_HASH_HEAD(headname, type, hashsize)     \
  34 struct headname {                                       \
  35         LIST_HEAD(, type)       chh_table[hashsize];    \
  36 }
  37 #define _CITRUS_HASH_INIT(head, hashsize)                       \
  38 do {                                                            \
  39         int _ch_loop;                                           \
  40         for (_ch_loop = 0; _ch_loop < hashsize; _ch_loop++)     \
  41                 LIST_INIT(&(head)->chh_table[_ch_loop]);        \
  42 } while (/*CONSTCOND*/0)
  43 #define _CITRUS_HASH_REMOVE(elm, field) LIST_REMOVE(elm, field)
  44 #define _CITRUS_HASH_INSERT(head, elm, field, hashval)          \
  45 LIST_INSERT_HEAD(&(head)->chh_table[hashval], elm, field)
  46 #define _CITRUS_HASH_SEARCH(head, elm, field, matchfunc, key, hashval)  \
  47 do {                                                                    \
  48         LIST_FOREACH((elm), &(head)->chh_table[hashval], field) {       \
  49                 if (matchfunc((elm), key)==0)                           \
  50                         break;                                          \
  51         }                                                               \
  52 } while (/*CONSTCOND*/0)
  53
  54 __BEGIN_DECLS
  55 int     _citrus_string_hash_func(const char *, int);
  56 __END_DECLS
  57
  58 #endif