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  */
  25
  26 #ifndef INCLUDED_hash_h
  27 #define INCLUDED_hash_h
  28
  29 struct Dictionary;
  30
  31 extern rb_dlink_list *clientTable;
  32 extern rb_dlink_list *channelTable;
  33 extern rb_dlink_list *idTable;
  34 extern rb_dlink_list *resvTable;
  35 extern rb_dlink_list *hostTable;
  36 extern rb_dlink_list *helpTable;
  37
  38 extern struct Dictionary *nd_dict;
  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 17
  45 #define U_MAX 131072 /* 2^17 */
  46
  47 /* Client fd hash table size, used in hash.c */
  48 #define CLI_FD_MAX 4096
  49
  50 /* Channel hash table size, hash.c/s_debug.c */
  51 #define CH_MAX_BITS 16
  52 #define CH_MAX 65536 /* 2^16 */
  53
  54 /* hostname hash table size */
  55 #define HOST_MAX_BITS 17
  56 #define HOST_MAX 131072 /* 2^17 */
  57
  58 /* RESV/XLINE hash table size, used in hash.c */
  59 #define R_MAX_BITS 10
  60 #define R_MAX 1024 /* 2^10 */
  61
  62
  63 #define HASH_WALK(i, max, ptr, table) for (i = 0; i < max; i++) { RB_DLINK_FOREACH(ptr, table[i].head)
  64 #define HASH_WALK_SAFE(i, max, ptr, nptr, table) for (i = 0; i < max; i++) { RB_DLINK_FOREACH_SAFE(ptr, nptr, table[i].head)
  65 #define HASH_WALK_END }
  66
  67 struct Client;
  68 struct Channel;
  69 struct ConfItem;
  70 struct cachefile;
  71 struct nd_entry;
  72
  73 extern u_int32_t fnv_hash_upper(const unsigned char *s, int bits);
  74 extern u_int32_t fnv_hash(const unsigned char *s, int bits);
  75 extern u_int32_t fnv_hash_len(const unsigned char *s, int bits, int len);
  76 extern u_int32_t fnv_hash_upper_len(const unsigned char *s, int bits, int len);
  77
  78 extern void init_hash(void);
  79
  80 extern void add_to_client_hash(const char *name, struct Client *client);
  81 extern void del_from_client_hash(const char *name, struct Client *client);
  82 extern struct Client *find_client(const char *name);
  83 extern struct Client *find_named_client(const char *name);
  84 extern struct Client *find_server(struct Client *source_p, const char *name);
  85
  86 extern void add_to_id_hash(const char *, struct Client *);
  87 extern void del_from_id_hash(const char *name, struct Client *client);
  88 extern struct Client *find_id(const char *name);
  89
  90 extern struct Channel *get_or_create_channel(struct Client *client_p, const char *chname, int *isnew);
  91 extern void del_from_channel_hash(const char *name, struct Channel *chan);
  92 extern struct Channel *find_channel(const char *name);
  93
  94 extern void add_to_hostname_hash(const char *, struct Client *);
  95 extern void del_from_hostname_hash(const char *, struct Client *);
  96 extern rb_dlink_node *find_hostname(const char *);
  97
  98 extern void add_to_resv_hash(const char *name, struct ConfItem *aconf);
  99 extern void del_from_resv_hash(const char *name, struct ConfItem *aconf);
 100 extern struct ConfItem *hash_find_resv(const char *name);
 101 extern void clear_resv_hash(void);
 102
 103 void add_to_cli_fd_hash(struct Client *client_p);
 104 void del_from_cli_fd_hash(struct Client *client_p);
 105 struct Client *find_cli_fd_hash(int fd);
 106
 107 extern void hash_stats(struct Client *);
 108
 109 #endif /* INCLUDED_hash_h */