1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*-
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char rcsid[] = "$OpenBSD: hsearch.c,v 1.3 1996/08/19 08:20:41 tholo Exp $";
#endif /* LIBC_SCCS and not lint */
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include <db.h>
#include "search.h"
static DB *dbp = NULL;
static ENTRY retval;
extern int
hcreate(nel)
u_int nel;
{
HASHINFO info;
info.nelem = nel;
info.bsize = 256;
info.ffactor = 8;
info.cachesize = 0;
info.hash = NULL;
info.lorder = 0;
dbp = (DB *)__hash_open(NULL, O_CREAT | O_RDWR, 0600, &info, 0);
return (dbp != NULL);
}
extern ENTRY *
hsearch(item, action)
ENTRY item;
ACTION action;
{
DBT key, val;
int status;
if (!dbp)
return (NULL);
key.data = (u_char *)item.key;
key.size = strlen(item.key) + 1;
if (action == ENTER) {
val.data = (u_char *)item.data;
val.size = strlen(item.data) + 1;
status = (dbp->put)(dbp, &key, &val, R_NOOVERWRITE);
if (status)
return (NULL);
} else {
/* FIND */
status = (dbp->get)(dbp, &key, &val, 0);
if (status)
return (NULL);
else
item.data = (char *)val.data;
}
retval.key = item.key;
retval.data = item.data;
return (&retval);
}
extern void
hdestroy()
{
if (dbp) {
(void)(dbp->close)(dbp);
dbp = NULL;
}
}
|
