/*- * See the file LICENSE for redistribution information. * * Copyright (c) 1996, 2010 Oracle and/or its affiliates. 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. * * $Id$ */ #include "db_config.h" #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_MODE_600)) != 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); } DB_INIT_DBT(key, item.key, strlen(item.key) + 1); memset(&val, 0, sizeof(val)); switch (action) { case ENTER: DB_SET_DBT(val, item.data, 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; } }