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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1996-2002
* Sleepycat Software. All rights reserved.
*/
/*
* Copyright (c) 1990, 1993
* Margo Seltzer. All rights reserved.
*/
/*
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Margo Seltzer.
*
* 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. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*/
#include "db_config.h"
#ifndef lint
static const char revid[] = "$Id: hsearch.c,v 1.1.1.1 2003/11/20 22:13:32 toshok Exp $";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <string.h>
#endif
#define DB_DBM_HSEARCH 1
#include "db_int.h"
static DB *dbp;
static ENTRY retval;
/*
* Translate HSEARCH calls into DB calls so that DB doesn't step on the
* application's name space.
*
* EXTERN: #if DB_DBM_HSEARCH != 0
*
* EXTERN: int __db_hcreate __P((size_t));
* EXTERN: ENTRY *__db_hsearch __P((ENTRY, ACTION));
* EXTERN: void __db_hdestroy __P((void));
*
* EXTERN: #endif
*/
int
__db_hcreate(nel)
size_t nel;
{
int ret;
if ((ret = db_create(&dbp, NULL, 0)) != 0) {
__os_set_errno(ret);
return (1);
}
if ((ret = dbp->set_pagesize(dbp, 512)) != 0 ||
(ret = dbp->set_h_ffactor(dbp, 16)) != 0 ||
(ret = dbp->set_h_nelem(dbp, (u_int32_t)nel)) != 0 ||
(ret = dbp->open(dbp,
NULL, NULL, NULL, DB_HASH, DB_CREATE, __db_omode("rw----"))) != 0)
__os_set_errno(ret);
/*
* !!!
* Hsearch returns 0 on error, not 1.
*/
return (ret == 0 ? 1 : 0);
}
ENTRY *
__db_hsearch(item, action)
ENTRY item;
ACTION action;
{
DBT key, val;
int ret;
if (dbp == NULL) {
__os_set_errno(EINVAL);
return (NULL);
}
memset(&key, 0, sizeof(key));
memset(&val, 0, sizeof(val));
key.data = item.key;
key.size = (u_int32_t)strlen(item.key) + 1;
switch (action) {
case ENTER:
val.data = item.data;
val.size = (u_int32_t)strlen(item.data) + 1;
/*
* Try and add the key to the database. If we fail because
* the key already exists, return the existing key.
*/
if ((ret =
dbp->put(dbp, NULL, &key, &val, DB_NOOVERWRITE)) == 0)
break;
if (ret == DB_KEYEXIST &&
(ret = dbp->get(dbp, NULL, &key, &val, 0)) == 0)
break;
/*
* The only possible DB error is DB_NOTFOUND, and it can't
* happen. Check for a DB error, and lie if we find one.
*/
__os_set_errno(ret > 0 ? ret : EINVAL);
return (NULL);
case FIND:
if ((ret = dbp->get(dbp, NULL, &key, &val, 0)) != 0) {
if (ret != DB_NOTFOUND)
__os_set_errno(ret);
return (NULL);
}
item.data = (char *)val.data;
break;
default:
__os_set_errno(EINVAL);
return (NULL);
}
retval.key = item.key;
retval.data = item.data;
return (&retval);
}
void
__db_hdestroy()
{
if (dbp != NULL) {
(void)dbp->close(dbp, 0);
dbp = NULL;
}
}
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