[irc/rqf/shadowircd.git] / src / operhash.c

/* ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
 * operhash.c - Hashes nick!user@host{oper}
 *
 * Copyright (C) 2005 Lee Hardy <lee -at- leeh.co.uk>
 * Copyright (C) 2005 ircd-ratbox development team
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1.Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * 2.Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * 3.The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * $Id: operhash.c 26094 2008-09-19 15:33:46Z androsyn $
 */
#include <ratbox_lib.h>
#include "stdinc.h"
#include "match.h"
#include "hash.h"
#include "operhash.h"

#define OPERHASH_MAX_BITS 7
#define OPERHASH_MAX (1<<OPERHASH_MAX_BITS)

#define hash_opername(x) fnv_hash_upper((const unsigned char *)(x), OPERHASH_MAX_BITS)

static rb_dlink_list operhash_table[OPERHASH_MAX];

const char *
operhash_add(const char *name)
{
	struct operhash_entry *ohash;
	unsigned int hashv;
	rb_dlink_node *ptr;

	if(EmptyString(name))
		return NULL;

	hashv = hash_opername(name);

	RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
	{
		ohash = ptr->data;

		if(!irccmp(ohash->name, name))
		{
			ohash->refcount++;
			return ohash->name;
		}
	}

	ohash = rb_malloc(sizeof(struct operhash_entry));
	ohash->refcount = 1;
	ohash->name = rb_strdup(name);

	rb_dlinkAddAlloc(ohash, &operhash_table[hashv]);

	return ohash->name;
}

const char *
operhash_find(const char *name)
{
	struct operhash_entry *ohash;
	unsigned int hashv;
	rb_dlink_node *ptr;

	if(EmptyString(name))
		return NULL;

	hashv = hash_opername(name);

	RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
	{
		ohash = ptr->data;

		if(!irccmp(ohash->name, name))
			return ohash->name;
	}

	return NULL;
}

void
operhash_delete(const char *name)
{
	struct operhash_entry *ohash;
	unsigned int hashv;
	rb_dlink_node *ptr;

	if(EmptyString(name))
		return;

	hashv = hash_opername(name);

	RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
	{
		ohash = ptr->data;

		if(irccmp(ohash->name, name))
			continue;

		ohash->refcount--;

		if(ohash->refcount == 0)
		{
			rb_free(ohash->name);
			rb_free(ohash);
			rb_dlinkDestroy(ptr, &operhash_table[hashv]);
			return;
		}
	}
}
Commit	Line	Data
a0f4c418 JT	1	/* ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd).
	2	* operhash.c - Hashes nick!user@host{oper}
	3	*
	4	* Copyright (C) 2005 Lee Hardy <lee -at- leeh.co.uk>
	5	* Copyright (C) 2005 ircd-ratbox development team
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions are
	9	* met:
	10	*
	11	* 1.Redistributions of source code must retain the above copyright notice,
	12	* this list of conditions and the following disclaimer.
	13	* 2.Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3.The name of the author may not be used to endorse or promote products
	17	* derived from this software without specific prior written permission.
	18	*
	19	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	20	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	21	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	22	* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
	23	* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	24	* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	25	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	26	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	27	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	28	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	29	* POSSIBILITY OF SUCH DAMAGE.
	30	*
	31	* $Id: operhash.c 26094 2008-09-19 15:33:46Z androsyn $
	32	*/
	33	#include <ratbox_lib.h>
	34	#include "stdinc.h"
	35	#include "match.h"
	36	#include "hash.h"
	37	#include "operhash.h"
	38
	39	#define OPERHASH_MAX_BITS 7
	40	#define OPERHASH_MAX (1<<OPERHASH_MAX_BITS)
	41
	42	#define hash_opername(x) fnv_hash_upper((const unsigned char *)(x), OPERHASH_MAX_BITS)
	43
	44	static rb_dlink_list operhash_table[OPERHASH_MAX];
	45
	46	const char *
	47	operhash_add(const char *name)
	48	{
	49	struct operhash_entry *ohash;
	50	unsigned int hashv;
	51	rb_dlink_node *ptr;
	52
	53	if(EmptyString(name))
	54	return NULL;
	55
	56	hashv = hash_opername(name);
	57
	58	RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
	59	{
	60	ohash = ptr->data;
	61
	62	if(!irccmp(ohash->name, name))
	63	{
	64	ohash->refcount++;
65	return ohash->name;
66	}
67	}
68
69	ohash = rb_malloc(sizeof(struct operhash_entry));
70	ohash->refcount = 1;
71	ohash->name = rb_strdup(name);
72
73	rb_dlinkAddAlloc(ohash, &operhash_table[hashv]);
74
75	return ohash->name;
76	}
77
78	const char *
79	operhash_find(const char *name)
80	{
81	struct operhash_entry *ohash;
82	unsigned int hashv;
83	rb_dlink_node *ptr;
84
85	if(EmptyString(name))
86	return NULL;
87
88	hashv = hash_opername(name);
89
90	RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
91	{
92	ohash = ptr->data;
93
94	if(!irccmp(ohash->name, name))
95	return ohash->name;
96	}
97
98	return NULL;
99	}
100
101	void
102	operhash_delete(const char *name)
103	{
104	struct operhash_entry *ohash;
105	unsigned int hashv;
106	rb_dlink_node *ptr;
107
108	if(EmptyString(name))
109	return;
110
111	hashv = hash_opername(name);
112
113	RB_DLINK_FOREACH(ptr, operhash_table[hashv].head)
114	{
115	ohash = ptr->data;
116
117	if(irccmp(ohash->name, name))
118	continue;
119
120	ohash->refcount--;
121
122	if(ohash->refcount == 0)
123	{
124	rb_free(ohash->name);
125	rb_free(ohash);
126	rb_dlinkDestroy(ptr, &operhash_table[hashv]);
127	return;
128	}
129	}
130	}