163 lines
3.9 KiB
C
163 lines
3.9 KiB
C
/* $NetBSD: ndbmdatum.c,v 1.4 2008/09/11 12:58:00 joerg Exp $ */
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/* from: NetBSD: ndbm.c,v 1.18 2004/04/27 20:03:45 kleink Exp */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Margo Seltzer.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if HAVE_NBTOOL_CONFIG_H
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#include "nbtool_config.h"
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#endif
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#include <sys/cdefs.h>
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#ifndef __minix
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__RCSID("$NetBSD: ndbmdatum.c,v 1.4 2008/09/11 12:58:00 joerg Exp $");
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#endif
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/*
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* This package provides a dbm compatible interface to the new hashing
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* package described in db(3).
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*/
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#ifndef __minix
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#include "namespace.h"
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#endif
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#include <sys/param.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <ndbm.h>
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#include "hash.h"
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/*
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* Returns:
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* DATUM on success
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* NULL on failure
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*/
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datum
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dbm_fetch(DBM *db, datum key)
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{
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datum retdata;
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int status;
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DBT dbtkey, dbtretdata;
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dbtkey.data = key.dptr;
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dbtkey.size = key.dsize;
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status = (db->get)(db, &dbtkey, &dbtretdata, 0);
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if (status) {
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dbtretdata.data = NULL;
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dbtretdata.size = 0;
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}
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retdata.dptr = dbtretdata.data;
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retdata.dsize = dbtretdata.size;
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return (retdata);
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}
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/*
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* Returns:
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* DATUM on success
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* NULL on failure
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*/
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datum
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dbm_firstkey(DBM *db)
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{
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int status;
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datum retkey;
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DBT dbtretkey, dbtretdata;
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status = (db->seq)(db, &dbtretkey, &dbtretdata, R_FIRST);
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if (status)
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dbtretkey.data = NULL;
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retkey.dptr = dbtretkey.data;
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retkey.dsize = dbtretkey.size;
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return (retkey);
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}
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/*
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* Returns:
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* DATUM on success
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* NULL on failure
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*/
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datum
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dbm_nextkey(DBM *db)
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{
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int status;
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datum retkey;
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DBT dbtretkey, dbtretdata;
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status = (db->seq)(db, &dbtretkey, &dbtretdata, R_NEXT);
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if (status)
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dbtretkey.data = NULL;
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retkey.dptr = dbtretkey.data;
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retkey.dsize = dbtretkey.size;
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return (retkey);
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}
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/*
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* Returns:
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* 0 on success
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* <0 failure
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*/
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int
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dbm_delete(DBM *db, datum key)
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{
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int status;
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DBT dbtkey;
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dbtkey.data = key.dptr;
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dbtkey.size = key.dsize;
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status = (db->del)(db, &dbtkey, 0);
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if (status)
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return (-1);
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else
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return (0);
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}
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/*
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* Returns:
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* 0 on success
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* <0 failure
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* 1 if DBM_INSERT and entry exists
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*/
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int
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dbm_store(DBM *db, datum key, datum data, int flags)
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{
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DBT dbtkey, dbtdata;
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dbtkey.data = key.dptr;
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dbtkey.size = key.dsize;
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dbtdata.data = data.dptr;
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dbtdata.size = data.dsize;
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return ((db->put)(db, &dbtkey, &dbtdata,
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(u_int)((flags == DBM_INSERT) ? R_NOOVERWRITE : 0)));
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}
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