include/whowas.h

   1 /*
   2  * IRC - Internet Relay Chat, include/whowas.h
   3  * Copyright (C) 1990 Markku Savela
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 1, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19 /** @file
  20  * @brief Globally visible declarations to manipulate whowas information.
  21  * @version $Id: whowas.h,v 1.6 2004/10/05 04:14:44 entrope Exp $
  22  */
  23 #ifndef INCLUDED_whowas_h
  24 #define INCLUDED_whowas_h
  25 #ifndef INCLUDED_sys_types_h
  26 #include <sys/types.h>        /* size_t */
  27 #define INCLUDED_sys_types_h
  28 #endif
  29
  30 struct Client;
  31
  32 /*
  33  * General defines
  34  */
  35
  36 #define BITS_PER_COL            3   /**< Magic number used by whowas hash function. */
  37 #define BITS_PER_COL_MASK       0x7 /**< Mask with #BITS_PER_COL least significant bits set. */
  38 #define WW_MAX_INITIAL          16  /**< Magic number used by whowas hash function. */
  39
  40 #define MAX_SUB (1 << BITS_PER_COL) /**< Magic number used by whowas hash function. */
  41 #define WW_MAX_INITIAL_MASK (WW_MAX_INITIAL - 1) /**< Magic number used by whowas hash function. */
  42 #define WW_MAX (WW_MAX_INITIAL * MAX_SUB) /**< Size of whowas hash table. */
  43
  44 /*
  45  * Structures
  46  */
  47
  48 /** Tracks previously used nicknames. */
  49 struct Whowas {
  50   unsigned int hashv;           /**< Hash value for nickname. */
  51   char *name;                   /**< Client's old nickname. */
  52   char *username;               /**< Client's username. */
  53   char *hostname;               /**< Client's hostname. */
  54   char *realhost;               /**< Client's real hostname. */
  55   char *servername;             /**< Name of client's server. */
  56   char *realname;               /**< Client's realname (user info). */
  57   char *away;                   /**< Client's away message. */
  58   time_t logoff;                /**< When the client logged off. */
  59   struct Client *online;        /**< Needed for get_history() (nick chasing). */
  60   struct Whowas *hnext;         /**< Next entry with the same hash value. */
  61   struct Whowas **hprevnextp;   /**< Pointer to previous next pointer. */
  62   struct Whowas *cnext;         /**< Next entry with the same 'online' pointer. */
  63   struct Whowas **cprevnextp;   /**< Pointer to previous next pointer. */
  64   struct Whowas *wnext;         /**< Next entry in whowas linked list. */
  65   struct Whowas *wprev;         /**< Pointer to previous next pointer. */
  66 };
  67
  68 /*
  69  * Proto types
  70  */
  71 extern struct Whowas* whowashash[];
  72
  73 extern unsigned int hash_whowas_name(const char *name);
  74
  75 extern struct Client *get_history(const char *nick, time_t timelimit);
  76 extern void add_history(struct Client *cptr, int still_on);
  77 extern void off_history(const struct Client *cptr);
  78 extern void initwhowas(void);
  79 extern void count_whowas_memory(int *wwu, size_t *wwm, int *wwa, size_t *wwam);
  80
  81 extern void whowas_realloc(void);
  82
  83 #endif /* INCLUDED_whowas_h */