include/hash.h

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  hash.h: A header for the ircd hashtable code.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2004 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
  22  *  USA
  23  *
  24  *  $Id: hash.h 722 2006-02-08 21:51:28Z nenolod $
  25  */
  26
  27 #ifndef INCLUDED_hash_h
  28 #define INCLUDED_hash_h
  29
  30 #include "tools.h"
  31
  32 extern dlink_list *clientTable;
  33 extern dlink_list *channelTable;
  34 extern dlink_list *idTable;
  35 extern dlink_list *resvTable;
  36 extern dlink_list *hostTable;
  37 extern dlink_list *helpTable;
  38 extern dlink_list *ndTable;
  39
  40 /* Magic value for FNV hash functions */
  41 #define FNV1_32_INIT 0x811c9dc5UL
  42
  43 /* Client hash table size, used in hash.c/s_debug.c */
  44 #define U_MAX_BITS (32-17)
  45 #define U_MAX 131072 /* 2^17 */
  46
  47 /* Channel hash table size, hash.c/s_debug.c */
  48 #define CH_MAX_BITS (32-16)
  49 #define CH_MAX 65536 /* 2^16 */
  50
  51 /* hostname hash table size */
  52 #define HOST_MAX_BITS (32-17)
  53 #define HOST_MAX 131072 /* 2^17 */
  54
  55 /* RESV/XLINE hash table size, used in hash.c */
  56 #define R_MAX_BITS (32-10)
  57 #define R_MAX 1024 /* 2^10 */
  58
  59
  60 #define HASH_WALK(i, max, ptr, table) for (i = 0; i < max; i++) { DLINK_FOREACH(ptr, table[i].head)
  61 #define HASH_WALK_SAFE(i, max, ptr, nptr, table) for (i = 0; i < max; i++) { DLINK_FOREACH_SAFE(ptr, nptr, table[i].head)
  62 #define HASH_WALK_END }
  63
  64 struct Client;
  65 struct Channel;
  66 struct ConfItem;
  67 struct cachefile;
  68 struct nd_entry;
  69
  70 extern u_int32_t fnv_hash_upper(const unsigned char *s, int bits);
  71 extern u_int32_t fnv_hash(const unsigned char *s, int bits);
  72 extern u_int32_t fnv_hash_len(const unsigned char *s, int bits, int len);
  73 extern u_int32_t fnv_hash_upper_len(const unsigned char *s, int bits, int len);
  74
  75 extern void init_hash(void);
  76
  77 extern void add_to_client_hash(const char *name, struct Client *client);
  78 extern void del_from_client_hash(const char *name, struct Client *client);
  79 extern struct Client *find_any_client(const char *name);
  80 extern struct Client *find_client(const char *name);
  81 extern struct Client *find_named_client(const char *name);
  82 extern struct Client *find_server(struct Client *source_p, const char *name);
  83
  84 extern void add_to_id_hash(const char *, struct Client *);
  85 extern void del_from_id_hash(const char *name, struct Client *client);
  86 extern struct Client *find_id(const char *name);
  87
  88 extern struct Channel *get_or_create_channel(struct Client *client_p, const char *chname, int *isnew);
  89 extern void del_from_channel_hash(const char *name, struct Channel *chan);
  90 extern struct Channel *find_channel(const char *name);
  91
  92 extern void add_to_hostname_hash(const char *, struct Client *);
  93 extern void del_from_hostname_hash(const char *, struct Client *);
  94 extern dlink_node *find_hostname(const char *);
  95
  96 extern void add_to_resv_hash(const char *name, struct ConfItem *aconf);
  97 extern void del_from_resv_hash(const char *name, struct ConfItem *aconf);
  98 extern struct ConfItem *hash_find_resv(const char *name);
  99 extern void clear_resv_hash(void);
 100
 101 extern void add_to_help_hash(const char *name, struct cachefile *hptr);
 102 extern void clear_help_hash(void);
 103 extern struct cachefile *hash_find_help(const char *name, int flags);
 104
 105 extern void add_to_nd_hash(const char *name, struct nd_entry *nd);
 106 extern struct nd_entry *hash_find_nd(const char *name);
 107
 108 extern void hash_stats(struct Client *);
 109
 110 #endif /* INCLUDED_hash_h */