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