170 lines
4.2 KiB
C
170 lines
4.2 KiB
C
/* $NetBSD: ndbmdatum.c,v 1.5 2012/03/13 21:13:33 christos Exp $ */
|
|
/* from: NetBSD: ndbm.c,v 1.18 2004/04/27 20:03:45 kleink Exp */
|
|
|
|
/*-
|
|
* Copyright (c) 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Margo Seltzer.
|
|
*
|
|
* 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: ndbmdatum.c,v 1.5 2012/03/13 21:13:33 christos Exp $");
|
|
|
|
/*
|
|
* This package provides a dbm compatible interface to the new hashing
|
|
* package described in db(3).
|
|
*/
|
|
#include "namespace.h"
|
|
#include <sys/param.h>
|
|
|
|
#include <fcntl.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <ndbm.h>
|
|
#include "hash.h"
|
|
|
|
#ifndef datum_truncate
|
|
#define datum_truncate(a) (a)
|
|
#endif
|
|
/*
|
|
* Returns:
|
|
* DATUM on success
|
|
* NULL on failure
|
|
*/
|
|
datum
|
|
dbm_fetch(DBM *db, datum key)
|
|
{
|
|
datum retdata;
|
|
int status;
|
|
DBT dbtkey, dbtretdata;
|
|
|
|
dbtkey.data = key.dptr;
|
|
dbtkey.size = key.dsize;
|
|
status = (db->get)(db, &dbtkey, &dbtretdata, 0);
|
|
if (status) {
|
|
dbtretdata.data = NULL;
|
|
dbtretdata.size = 0;
|
|
}
|
|
retdata.dptr = dbtretdata.data;
|
|
retdata.dsize = datum_truncate(dbtretdata.size);
|
|
return (retdata);
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* DATUM on success
|
|
* NULL on failure
|
|
*/
|
|
datum
|
|
dbm_firstkey(DBM *db)
|
|
{
|
|
int status;
|
|
datum retkey;
|
|
DBT dbtretkey, dbtretdata;
|
|
|
|
status = (db->seq)(db, &dbtretkey, &dbtretdata, R_FIRST);
|
|
if (status)
|
|
dbtretkey.data = NULL;
|
|
retkey.dptr = dbtretkey.data;
|
|
retkey.dsize = datum_truncate(dbtretkey.size);
|
|
return (retkey);
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* DATUM on success
|
|
* NULL on failure
|
|
*/
|
|
datum
|
|
dbm_nextkey(DBM *db)
|
|
{
|
|
int status;
|
|
datum retkey;
|
|
DBT dbtretkey, dbtretdata;
|
|
|
|
status = (db->seq)(db, &dbtretkey, &dbtretdata, R_NEXT);
|
|
if (status)
|
|
dbtretkey.data = NULL;
|
|
retkey.dptr = dbtretkey.data;
|
|
retkey.dsize = datum_truncate(dbtretkey.size);
|
|
return (retkey);
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* 0 on success
|
|
* <0 failure
|
|
*/
|
|
int
|
|
dbm_delete(DBM *db, datum key)
|
|
{
|
|
int status;
|
|
DBT dbtkey;
|
|
|
|
dbtkey.data = key.dptr;
|
|
dbtkey.size = key.dsize;
|
|
status = (db->del)(db, &dbtkey, 0);
|
|
if (status)
|
|
return (-1);
|
|
else
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* 0 on success
|
|
* <0 failure
|
|
* 1 if DBM_INSERT and entry exists
|
|
*/
|
|
int
|
|
dbm_store(DBM *db, datum key, datum data, int flags)
|
|
{
|
|
DBT dbtkey, dbtdata;
|
|
|
|
dbtkey.data = key.dptr;
|
|
dbtkey.size = key.dsize;
|
|
dbtdata.data = data.dptr;
|
|
dbtdata.size = data.dsize;
|
|
return ((db->put)(db, &dbtkey, &dbtdata,
|
|
(u_int)((flags == DBM_INSERT) ? R_NOOVERWRITE : 0)));
|
|
}
|
|
|
|
#if defined(__minix) && defined(__weak_alias)
|
|
__weak_alias(dbm_delete, __dbm_delete13)
|
|
__weak_alias(dbm_fetch, __dbm_fetch13)
|
|
__weak_alias(dbm_firstkey, __dbm_firstkey13)
|
|
__weak_alias(dbm_nextkey, __dbm_nextkey13)
|
|
__weak_alias(dbm_store, __dbm_store13)
|
|
#endif
|