Asterisk - The Open Source Telephony Project  GIT-master-4a4f1a5
hsearch.c
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1 /*-
2  * Copyright (c) 1990, 1993
3  * The Regents of the University of California. All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * Margo Seltzer.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  * must display the following acknowledgement:
18  * This product includes software developed by the University of
19  * California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  * may be used to endorse or promote products derived from this software
22  * without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  */
36 
37 #if defined(LIBC_SCCS) && !defined(lint)
38 static char sccsid[] = "@(#)hsearch.c 8.4 (Berkeley) 7/21/94";
39 #endif /* LIBC_SCCS and not lint */
40 
41 #include <sys/types.h>
42 
43 #include <fcntl.h>
44 #include <string.h>
45 
46 #include "../include/db.h"
47 #include "search.h"
48 
49 static DB *dbp = NULL;
50 static ENTRY retval;
51 
52 extern int
53 hcreate(nel)
54  u_int nel;
55 {
56  HASHINFO info;
57 
58  info.nelem = nel;
59  info.bsize = 256;
60  info.ffactor = 8;
61  info.cachesize = 0;
62  info.hash = NULL;
63  info.lorder = 0;
64  dbp = (DB *)__hash_open(NULL, O_CREAT | O_RDWR, 0600, &info, 0);
65  return ((int)dbp);
66 }
67 
68 extern ENTRY *
69 hsearch(item, action)
70  ENTRY item;
71  ACTION action;
72 {
73  DBT key, val;
74  int status;
75 
76  if (!dbp)
77  return (NULL);
78  key.data = (u_char *)item.key;
79  key.size = strlen(item.key) + 1;
80 
81  if (action == ENTER) {
82  val.data = (u_char *)item.data;
83  val.size = strlen(item.data) + 1;
84  status = (dbp->put)(dbp, &key, &val, R_NOOVERWRITE);
85  if (status)
86  return (NULL);
87  } else {
88  /* FIND */
89  status = (dbp->get)(dbp, &key, &val, 0);
90  if (status)
91  return (NULL);
92  else
93  item.data = (char *)val.data;
94  }
95  retval.key = item.key;
96  retval.data = item.data;
97  return (&retval);
98 }
99 
100 extern void
102 {
103  if (dbp) {
104  (void)(dbp->close)(dbp);
105  dbp = NULL;
106  }
107 }
jack_status_t status
Definition: app_jack.c:146
@ ENTER
Definition: app_meetme.c:674
#define R_NOOVERWRITE
Definition: db.h:98
DB * __hash_open(char *file, int flags, int mode, const HASHINFO *info, int dflags) const
Definition: hash.c:96
ACTION
Definition: hash.h:40
static DB * dbp
Definition: hsearch.c:49
int hcreate(u_int nel)
Definition: hsearch.c:53
ENTRY * hsearch(ENTRY item, ACTION action)
Definition: hsearch.c:69
void hdestroy()
Definition: hsearch.c:101
static ENTRY retval
Definition: hsearch.c:50
def info(msg)
#define NULL
Definition: resample.c:96
Definition: db.h:85
void * data
Definition: db.h:86
size_t size
Definition: db.h:87
Definition: db.h:163
Definition: db.h:129
Definition: search.h:40
char * key
Definition: search.h:41
char * data
Definition: search.h:42
Definition: ast_expr2.c:325
static struct aco_type item
Definition: test_config.c:1463