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/* $OpenBSD: ypdb.c,v 1.5 1997/02/09 09:49:36 maja Exp $ */
/*
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Margo Seltzer.
*
* This code is derived from ndbm module of BSD4.4 db (hash) by
* Mats O Jansson
*
* 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 AUTHOR ``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 AUTHOR 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/param.h>
#include <sys/types.h>
#include <stdio.h>
#include <string.h>
#include "ypdb.h"
#ifdef YPDB_PATCH
extern DBM *__hash_open();
#else
extern DBM *__bt_open();
#endif
/*
* Returns:
* *DBM on success
* NULL on failure
*/
extern DBM *
ypdb_open(file, flags, mode)
const char *file;
int flags, mode;
{
#ifdef YPDB_PATCH
HASHINFO info;
char path[MAXPATHLEN];
info.bsize = 4096;
info.ffactor = 40;
info.nelem = 1;
info.cachesize = NULL;
info.hash = NULL;
info.lorder = 0;
snprintf(path, sizeof(path), "%s%s", file, YPDB_SUFFIX);
return ((DBM *)__hash_open(path, flags, mode, &info, 0));
#else
BTREEINFO info;
char path[MAXPATHLEN];
DBM *db;
info.flags = 0;
info.cachesize = 0;
info.maxkeypage = 0;
info.minkeypage = 0;
info.psize = 0;
info.compare = NULL;
info.prefix = NULL;
info.lorder = 0;
snprintf(path, sizeof(path), "%s%s", file, YPDB_SUFFIX);
db = (DBM *)__bt_open(path, flags, mode, &info, 0);
return (db);
#endif
}
/*
* Returns:
* *DBM on success
* NULL on failure
*/
extern DBM *
ypdb_open_suf(file, flags, mode)
const char *file;
int flags, mode;
{
#ifdef YPDB_PATCH
HASHINFO info;
info.bsize = 4096;
info.ffactor = 40;
info.nelem = 1;
info.cachesize = NULL;
info.hash = NULL;
info.lorder = 0;
return ((DBM *)__hash_open(file, flags, mode, &info, 0));
#else
BTREEINFO info;
DBM *db;
info.flags = 0;
info.cachesize = 0;
info.maxkeypage = 0;
info.minkeypage = 0;
info.psize = 0;
info.compare = NULL;
info.prefix = NULL;
info.lorder = 0;
db = (DBM *)__bt_open(file, flags, mode, &info, 0);
return (db);
#endif
}
extern void
ypdb_close(db)
DBM *db;
{
(void)(db->close)(db);
}
/*
* Returns:
* DATUM on success
* NULL on failure
*/
extern datum
ypdb_fetch(db, key)
DBM *db;
datum key;
{
datum retval;
int status;
status = (db->get)(db, (DBT *)&key, (DBT *)&retval, 0);
if (status) {
retval.dptr = NULL;
retval.dsize = 0;
}
return (retval);
}
/*
* Returns:
* DATUM on success
* NULL on failure
*/
extern datum
ypdb_firstkey(db)
DBM *db;
{
int status;
datum retdata, retkey;
status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_FIRST);
if (status)
retkey.dptr = NULL;
return (retkey);
}
/*
* Returns:
* DATUM on success
* NULL on failure
*/
extern datum
ypdb_nextkey(db)
DBM *db;
{
int status;
datum retdata, retkey;
status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_NEXT);
if (status)
retkey.dptr = NULL;
return (retkey);
}
/*
* Returns:
* DATUM on success
* NULL on failure
*/
extern datum
ypdb_setkey(db, key)
DBM *db;
datum key;
{
int status;
datum retdata;
#ifdef YPDB_PATCH
datum retkey;
status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_FIRST);
if (status)
retkey.dptr = NULL;
while ((retkey.dptr != NULL) &&
((retkey.dsize != key.dsize) ||
(strncmp(key.dptr,retkey.dptr,retkey.dsize) != 0))) {
status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_NEXT);
if (status)
retkey.dptr = NULL;
};
return (retkey);
#else
status = (db->seq)(db, (DBT *)&key, (DBT *)&retdata, R_CURSOR);
if (status)
key.dptr = NULL;
return (key);
#endif
}
/*
* Returns:
* 0 on success
* <0 failure
*/
int
ypdb_delete(db, key)
DBM *db;
datum key;
{
int status;
status = (db->del)(db, (DBT *)&key, 0);
if (status)
return (-1);
else
return (0);
}
/*
* Returns:
* 0 on success
* <0 failure
* 1 if YPDB_INSERT and entry exists
*/
int
ypdb_store(db, key, content, flags)
DBM *db;
datum key, content;
int flags;
{
return ((db->put)(db, (DBT *)&key, (DBT *)&content,
(flags == YPDB_INSERT) ? R_NOOVERWRITE : 0));
}
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