108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Margo Seltzer.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)hsearch.c 8.4 (Berkeley) 7/21/94";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <fcntl.h>
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#include <string.h>
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#include <db.h>
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#include "search.h"
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static DB *dbp = NULL;
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static ENTRY retval;
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extern int
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hcreate(nel)
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u_int nel;
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{
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HASHINFO info;
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info.nelem = nel;
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info.bsize = 256;
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info.ffactor = 8;
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info.cachesize = 0;
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info.hash = NULL;
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info.lorder = 0;
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dbp = (DB *)__hash_open(NULL, O_CREAT | O_RDWR, 0600, &info, 0);
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return (dbp != NULL);
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}
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extern ENTRY *
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hsearch(item, action)
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ENTRY item;
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ACTION action;
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{
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DBT key, val;
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int status;
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if (!dbp)
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return (NULL);
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key.data = (u_char *)item.key;
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key.size = strlen(item.key) + 1;
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if (action == ENTER) {
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val.data = (u_char *)item.data;
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val.size = strlen(item.data) + 1;
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status = (dbp->put)(dbp, &key, &val, R_NOOVERWRITE);
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if (status)
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return (NULL);
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} else {
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/* FIND */
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status = (dbp->get)(dbp, &key, &val, 0);
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if (status)
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return (NULL);
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else
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item.data = (char *)val.data;
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}
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retval.key = item.key;
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retval.data = item.data;
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return (&retval);
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}
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extern void
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hdestroy()
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{
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if (dbp) {
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(void)(dbp->close)(dbp);
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dbp = NULL;
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}
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}
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