mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
125 lines
3.9 KiB
C
125 lines
3.9 KiB
C
/*-
|
|
* Copyright (c) 1990, 1993, 1994
|
|
* 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. 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 sccsid[] = "@(#)rec_utils.c 8.6 (Berkeley) 7/16/94";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <db.h>
|
|
#include "recno.h"
|
|
|
|
/*
|
|
* __rec_ret --
|
|
* Build return data.
|
|
*
|
|
* Parameters:
|
|
* t: tree
|
|
* e: key/data pair to be returned
|
|
* nrec: record number
|
|
* key: user's key structure
|
|
* data: user's data structure
|
|
*
|
|
* Returns:
|
|
* RET_SUCCESS, RET_ERROR.
|
|
*/
|
|
int
|
|
__rec_ret(t, e, nrec, key, data)
|
|
BTREE *t;
|
|
EPG *e;
|
|
recno_t nrec;
|
|
DBT *key, *data;
|
|
{
|
|
RLEAF *rl;
|
|
void *p;
|
|
|
|
if (key == NULL)
|
|
goto dataonly;
|
|
|
|
/* We have to copy the key, it's not on the page. */
|
|
if (sizeof(recno_t) > t->bt_rkey.size) {
|
|
p = (void *)(t->bt_rkey.data == NULL ?
|
|
malloc(sizeof(recno_t)) :
|
|
realloc(t->bt_rkey.data, sizeof(recno_t)));
|
|
if (p == NULL)
|
|
return (RET_ERROR);
|
|
t->bt_rkey.data = p;
|
|
t->bt_rkey.size = sizeof(recno_t);
|
|
}
|
|
memmove(t->bt_rkey.data, &nrec, sizeof(recno_t));
|
|
key->size = sizeof(recno_t);
|
|
key->data = t->bt_rkey.data;
|
|
|
|
dataonly:
|
|
if (data == NULL)
|
|
return (RET_SUCCESS);
|
|
|
|
/*
|
|
* We must copy big keys/data to make them contigous. Otherwise,
|
|
* leave the page pinned and don't copy unless the user specified
|
|
* concurrent access.
|
|
*/
|
|
rl = GETRLEAF(e->page, e->index);
|
|
if (rl->flags & P_BIGDATA) {
|
|
if (__ovfl_get(t, rl->bytes,
|
|
&data->size, &t->bt_rdata.data, &t->bt_rdata.size))
|
|
return (RET_ERROR);
|
|
data->data = t->bt_rdata.data;
|
|
} else if (F_ISSET(t, B_DB_LOCK)) {
|
|
/* Use +1 in case the first record retrieved is 0 length. */
|
|
if (rl->dsize + 1 > t->bt_rdata.size) {
|
|
p = (void *)(t->bt_rdata.data == NULL ?
|
|
malloc(rl->dsize + 1) :
|
|
realloc(t->bt_rdata.data, rl->dsize + 1));
|
|
if (p == NULL)
|
|
return (RET_ERROR);
|
|
t->bt_rdata.data = p;
|
|
t->bt_rdata.size = rl->dsize + 1;
|
|
}
|
|
memmove(t->bt_rdata.data, rl->bytes, rl->dsize);
|
|
data->size = rl->dsize;
|
|
data->data = t->bt_rdata.data;
|
|
} else {
|
|
data->size = rl->dsize;
|
|
data->data = rl->bytes;
|
|
}
|
|
return (RET_SUCCESS);
|
|
}
|