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https://github.com/matrix-construct/construct
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136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/* ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
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* operhash.c - Hashes nick!user@host{oper}
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*
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* Copyright (C) 2005 Lee Hardy <lee -at- leeh.co.uk>
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* Copyright (C) 2005 ircd-ratbox development team
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1.Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2.Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3.The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* $Id: operhash.c 26094 2008-09-19 15:33:46Z androsyn $
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*/
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#include <ratbox_lib.h>
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#include "stdinc.h"
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#include "match.h"
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#include "hash.h"
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#include "operhash.h"
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#define OPERHASH_MAX_BITS 7
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#define OPERHASH_MAX (1<<OPERHASH_MAX_BITS)
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#define hash_opername(x) fnv_hash_upper((const unsigned char *)(x), OPERHASH_MAX_BITS)
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struct operhash_entry
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{
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char *name;
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int refcount;
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};
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static rb_dlink_list operhash_table[OPERHASH_MAX];
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const char *
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operhash_add(const char *name)
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{
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struct operhash_entry *ohash;
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unsigned int hashv;
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rb_dlink_node *ptr;
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if(EmptyString(name))
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return NULL;
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hashv = hash_opername(name);
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RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
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{
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ohash = ptr->data;
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if(!irccmp(ohash->name, name))
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{
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ohash->refcount++;
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return ohash->name;
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}
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}
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ohash = rb_malloc(sizeof(struct operhash_entry));
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ohash->refcount = 1;
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ohash->name = rb_strdup(name);
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rb_dlinkAddAlloc(ohash, &operhash_table[hashv]);
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return ohash->name;
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}
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const char *
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operhash_find(const char *name)
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{
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struct operhash_entry *ohash;
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unsigned int hashv;
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rb_dlink_node *ptr;
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if(EmptyString(name))
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return NULL;
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hashv = hash_opername(name);
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RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
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{
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ohash = ptr->data;
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if(!irccmp(ohash->name, name))
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return ohash->name;
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}
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return NULL;
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}
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void
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operhash_delete(const char *name)
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{
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struct operhash_entry *ohash;
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unsigned int hashv;
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rb_dlink_node *ptr;
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if(EmptyString(name))
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return;
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hashv = hash_opername(name);
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RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
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{
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ohash = ptr->data;
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if(irccmp(ohash->name, name))
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continue;
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ohash->refcount--;
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if(ohash->refcount == 0)
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{
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rb_free(ohash->name);
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rb_free(ohash);
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rb_dlinkDestroy(ptr, &operhash_table[hashv]);
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return;
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}
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}
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}
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