GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/db/btree/bt_get.c Lines: 0 18 0.0 %
Date: 2017-11-07 Branches: 0 10 0.0 %

Line Branch Exec Source
1
/*	$OpenBSD: bt_get.c,v 1.8 2005/08/05 13:02:59 espie Exp $	*/
2
3
/*-
4
 * Copyright (c) 1990, 1993, 1994
5
 *	The Regents of the University of California.  All rights reserved.
6
 *
7
 * This code is derived from software contributed to Berkeley by
8
 * Mike Olson.
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. Neither the name of the University nor the names of its contributors
19
 *    may be used to endorse or promote products derived from this software
20
 *    without specific prior written permission.
21
 *
22
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32
 * SUCH DAMAGE.
33
 */
34
35
#include <sys/types.h>
36
37
#include <errno.h>
38
#include <stddef.h>
39
#include <stdio.h>
40
41
#include <db.h>
42
#include "btree.h"
43
44
/*
45
 * __BT_GET -- Get a record from the btree.
46
 *
47
 * Parameters:
48
 *	dbp:	pointer to access method
49
 *	key:	key to find
50
 *	data:	data to return
51
 *	flag:	currently unused
52
 *
53
 * Returns:
54
 *	RET_ERROR, RET_SUCCESS and RET_SPECIAL if the key not found.
55
 */
56
int
57
__bt_get(const DB *dbp, const DBT *key, DBT *data, u_int flags)
58
{
59
	BTREE *t;
60
	EPG *e;
61
	int exact, status;
62
63
	t = dbp->internal;
64
65
	/* Toss any page pinned across calls. */
66
	if (t->bt_pinned != NULL) {
67
		mpool_put(t->bt_mp, t->bt_pinned, 0);
68
		t->bt_pinned = NULL;
69
	}
70
71
	/* Get currently doesn't take any flags. */
72
	if (flags) {
73
		errno = EINVAL;
74
		return (RET_ERROR);
75
	}
76
77
	if ((e = __bt_search(t, key, &exact)) == NULL)
78
		return (RET_ERROR);
79
	if (!exact) {
80
		mpool_put(t->bt_mp, e->page, 0);
81
		return (RET_SPECIAL);
82
	}
83
84
	status = __bt_ret(t, e, NULL, NULL, data, &t->bt_rdata, 0);
85
86
	/*
87
	 * If the user is doing concurrent access, we copied the
88
	 * key/data, toss the page.
89
	 */
90
	if (F_ISSET(t, B_DB_LOCK))
91
		mpool_put(t->bt_mp, e->page, 0);
92
	else
93
		t->bt_pinned = e->page;
94
	return (status);
95
}