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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/db/recno/rec_search.c	Lines:	0	29	0.0 %
Date:	2017-11-07	Branches:	0	20	0.0 %


/*	$OpenBSD: rec_search.c,v 1.11 2005/08/05 13:03:00 espie Exp $	*/

/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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. 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.
 */

#include <sys/types.h>

#include <errno.h>
#include <stdio.h>

#include <db.h>
#include "recno.h"

/*
 * __REC_SEARCH -- Search a btree for a key.
 *
 * Parameters:
 *	t:	tree to search
 *	recno:	key to find
 *	op: 	search operation
 *
 * Returns:
 *	EPG for matching record, if any, or the EPG for the location of the
 *	key, if it were inserted into the tree.
 *
 * Returns:
 *	The EPG for matching record, if any, or the EPG for the location
 *	of the key, if it were inserted into the tree, is entered into
 *	the bt_cur field of the tree.  A pointer to the field is returned.
 */
EPG *
__rec_search(BTREE *t, recno_t recno, enum SRCHOP op)
{
	indx_t idx;
	PAGE *h;
	EPGNO *parent;
	RINTERNAL *r;
	pgno_t pg;
	indx_t top;
	recno_t total;
	int sverrno;

	BT_CLR(t);
	for (pg = P_ROOT, total = 0;;) {
		if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
			goto err;
		if (h->flags & P_RLEAF) {
			t->bt_cur.page = h;
			t->bt_cur.index = recno - total;
			return (&t->bt_cur);
		}
		for (idx = 0, top = NEXTINDEX(h);;) {
			r = GETRINTERNAL(h, idx);
			if (++idx == top || total + r->nrecs > recno)
				break;
			total += r->nrecs;
		}

		BT_PUSH(t, pg, idx - 1);

		pg = r->pgno;
		switch (op) {
		case SDELETE:
			--GETRINTERNAL(h, (idx - 1))->nrecs;
			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
			break;
		case SINSERT:
			++GETRINTERNAL(h, (idx - 1))->nrecs;
			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
			break;
		case SEARCH:
			mpool_put(t->bt_mp, h, 0);
			break;
		}

	}
	/* Try and recover the tree. */
err:	sverrno = errno;
	if (op != SEARCH)
		while  ((parent = BT_POP(t)) != NULL) {
			if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
				break;
			if (op == SINSERT)
				--GETRINTERNAL(h, parent->index)->nrecs;
			else
				++GETRINTERNAL(h, parent->index)->nrecs;
			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
		}
	errno = sverrno;
	return (NULL);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: rec_search.c,v 1.11 2005/08/05 13:03:00 espie Exp $ */
2
3			/*-
4			* Copyright (c) 1990, 1993
5			* The Regents of the University of California. All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			* 3. Neither the name of the University nor the names of its contributors
16			* may be used to endorse or promote products derived from this software
17			* without specific prior written permission.
18			*
19			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29			* SUCH DAMAGE.
30			*/
31
32			#include <sys/types.h>
33
34			#include <errno.h>
35			#include <stdio.h>
36
37			#include <db.h>
38			#include "recno.h"
39
40			/*
41			* __REC_SEARCH -- Search a btree for a key.
42			*
43			* Parameters:
44			* t: tree to search
45			* recno: key to find
46			* op: search operation
47			*
48			* Returns:
49			* EPG for matching record, if any, or the EPG for the location of the
50			* key, if it were inserted into the tree.
51			*
52			* Returns:
53			* The EPG for matching record, if any, or the EPG for the location
54			* of the key, if it were inserted into the tree, is entered into
55			* the bt_cur field of the tree. A pointer to the field is returned.
56			*/
57			EPG *
58			__rec_search(BTREE *t, recno_t recno, enum SRCHOP op)
59			{
60			indx_t idx;
61			PAGE *h;
62			EPGNO *parent;
63			RINTERNAL *r;
64			pgno_t pg;
65			indx_t top;
66			recno_t total;
67			int sverrno;
68
69			BT_CLR(t);
70			for (pg = P_ROOT, total = 0;;) {
71			if ((h = mpool_get(t->bt_mp, pg, 0)) == NULL)
72			goto err;
73			if (h->flags & P_RLEAF) {
74			t->bt_cur.page = h;
75			t->bt_cur.index = recno - total;
76			return (&t->bt_cur);
77			}
78			for (idx = 0, top = NEXTINDEX(h);;) {
79			r = GETRINTERNAL(h, idx);
80			if (++idx == top \|\| total + r->nrecs > recno)
81			break;
82			total += r->nrecs;
83			}
84
85			BT_PUSH(t, pg, idx - 1);
86
87			pg = r->pgno;
88			switch (op) {
89			case SDELETE:
90			--GETRINTERNAL(h, (idx - 1))->nrecs;
91			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
92			break;
93			case SINSERT:
94			++GETRINTERNAL(h, (idx - 1))->nrecs;
95			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
96			break;
97			case SEARCH:
98			mpool_put(t->bt_mp, h, 0);
99			break;
100			}
101
102			}
103			/* Try and recover the tree. */
104			err: sverrno = errno;
105			if (op != SEARCH)
106			while ((parent = BT_POP(t)) != NULL) {
107			if ((h = mpool_get(t->bt_mp, parent->pgno, 0)) == NULL)
108			break;
109			if (op == SINSERT)
110			--GETRINTERNAL(h, parent->index)->nrecs;
111			else
112			++GETRINTERNAL(h, parent->index)->nrecs;
113			mpool_put(t->bt_mp, h, MPOOL_DIRTY);
114			}
115			errno = sverrno;
116			return (NULL);
117			}