1 #pragma ident	"%Z%%M%	%I%	%E% SMI"
2 
3 /*-
4  * Copyright (c) 1990, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Margo Seltzer.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. All advertising materials mentioning features or use of this software
19  *    must display the following acknowledgement:
20  *	This product includes software developed by the University of
21  *	California, Berkeley and its contributors.
22  * 4. Neither the name of the University nor the names of its contributors
23  *    may be used to endorse or promote products derived from this software
24  *    without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36  * SUCH DAMAGE.
37  */
38 
39 #if defined(LIBC_SCCS) && !defined(lint)
40 static char sccsid[] = "@(#)hsearch.c	8.5 (Berkeley) 9/21/94";
41 #endif /* LIBC_SCCS and not lint */
42 
43 #include <sys/types.h>
44 
45 #include <fcntl.h>
46 #include <string.h>
47 
48 #include "db-int.h"
49 #include "search.h"
50 
51 static DB *dbp = NULL;
52 static ENTRY retval;
53 
54 extern int
55 hcreate(nel)
56 	u_int nel;
57 {
58 	HASHINFO info;
59 
60 	info.nelem = nel;
61 	info.bsize = 256;
62 	info.ffactor = 8;
63 	info.cachesize = 0;
64 	info.hash = NULL;
65 	info.lorder = 0;
66 	dbp = (DB *)__hash_open(NULL, O_CREAT | O_RDWR | O_BINARY, 0600, &info, 0);
67 	return (dbp != NULL);
68 }
69 
70 extern ENTRY *
71 hsearch(item, action)
72 	ENTRY item;
73 	ACTION action;
74 {
75 	DBT key, val;
76 	int status;
77 
78 	if (!dbp)
79 		return (NULL);
80 	key.data = (u_char *)item.key;
81 	key.size = strlen(item.key) + 1;
82 
83 	if (action == ENTER) {
84 		val.data = (u_char *)item.data;
85 		val.size = strlen(item.data) + 1;
86 		status = (dbp->put)(dbp, &key, &val, R_NOOVERWRITE);
87 		if (status)
88 			return (NULL);
89 	} else {
90 		/* FIND */
91 		status = (dbp->get)(dbp, &key, &val, 0);
92 		if (status)
93 			return (NULL);
94 		else
95 			item.data = (char *)val.data;
96 	}
97 	retval.key = item.key;
98 	retval.data = item.data;
99 	return (&retval);
100 }
101 
102 extern void
hdestroy()103 hdestroy()
104 {
105 	if (dbp) {
106 		(void)(dbp->close)(dbp);
107 		dbp = NULL;
108 	}
109 }
110