minix/lib/libc/db/recno/rec_utils.c
Lionel Sambuc 84d9c625bf Synchronize on NetBSD-CVS (2013/12/1 12:00:00 UTC)
- Fix for possible unset uid/gid in toproto
 - Fix for default mtree style
 - Update libelf
 - Importing libexecinfo
 - Resynchronize GCC, mpc, gmp, mpfr
 - build.sh: Replace params with show-params.
     This has been done as the make target has been renamed in the same
     way, while a new target named params has been added. This new
     target generates a file containing all the parameters, instead of
     printing it on the console.
 - Update test48 with new etc/services (Fix by Ben Gras <ben@minix3.org)
     get getservbyport() out of the inner loop

Change-Id: Ie6ad5226fa2621ff9f0dee8782ea48f9443d2091
2014-07-28 17:05:06 +02:00

120 lines
3.7 KiB
C

/* $NetBSD: rec_utils.c,v 1.13 2013/12/01 00:22:48 christos Exp $ */
/*-
* 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. 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 HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
__RCSID("$NetBSD: rec_utils.c,v 1.13 2013/12/01 00:22:48 christos Exp $");
#include <sys/param.h>
#include <assert.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(BTREE *t, EPG *e, recno_t nrec, DBT *key, DBT *data)
{
RLEAF *rl;
void *p;
if (key == NULL)
goto dataonly;
/* We have to copy the key, it's not on the page. */
if (sizeof(nrec) > t->bt_rkey.size) {
p = t->bt_rkey.data == NULL ?
malloc(sizeof(nrec)) :
realloc(t->bt_rkey.data, sizeof(nrec));
if (p == NULL)
return (RET_ERROR);
t->bt_rkey.data = p;
t->bt_rkey.size = sizeof(nrec);
}
memmove(t->bt_rkey.data, &nrec, sizeof(nrec));
key->size = sizeof(nrec);
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 = 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);
}