203 lines
4.2 KiB
C
203 lines
4.2 KiB
C
/*-
|
|
* 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. 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[] = "@(#)ndbm.c 8.4 (Berkeley) 7/21/94";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
/*
|
|
* This package provides a dbm compatible interface to the new hashing
|
|
* package described in db(3).
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <ndbm.h>
|
|
#include "hash.h"
|
|
|
|
/*
|
|
* Returns:
|
|
* *DBM on success
|
|
* NULL on failure
|
|
*/
|
|
extern DBM *
|
|
dbm_open(file, flags, mode)
|
|
const char *file;
|
|
int flags, mode;
|
|
{
|
|
HASHINFO info;
|
|
char path[MAXPATHLEN];
|
|
|
|
info.bsize = 4096;
|
|
info.ffactor = 40;
|
|
info.nelem = 1;
|
|
info.cachesize = 0;
|
|
info.hash = NULL;
|
|
info.lorder = 0;
|
|
(void)strcpy(path, file);
|
|
(void)strcat(path, DBM_SUFFIX);
|
|
return ((DBM *)__hash_open(path, flags, mode, &info, 0));
|
|
}
|
|
|
|
extern void
|
|
dbm_close(db)
|
|
DBM *db;
|
|
{
|
|
(void)(db->close)(db);
|
|
}
|
|
|
|
/*
|
|
* Returns:
|
|
* DATUM on success
|
|
* NULL on failure
|
|
*/
|
|
extern datum
|
|
dbm_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
|
|
dbm_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
|
|
dbm_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:
|
|
* 0 on success
|
|
* <0 failure
|
|
*/
|
|
extern int
|
|
dbm_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 DBM_INSERT and entry exists
|
|
*/
|
|
extern int
|
|
dbm_store(db, key, content, flags)
|
|
DBM *db;
|
|
datum key, content;
|
|
int flags;
|
|
{
|
|
return ((db->put)(db, (DBT *)&key, (DBT *)&content,
|
|
(flags == DBM_INSERT) ? R_NOOVERWRITE : 0));
|
|
}
|
|
|
|
extern int
|
|
dbm_error(db)
|
|
DBM *db;
|
|
{
|
|
HTAB *hp;
|
|
|
|
hp = (HTAB *)db->internal;
|
|
return (hp->error);
|
|
}
|
|
|
|
extern int
|
|
dbm_clearerr(db)
|
|
DBM *db;
|
|
{
|
|
HTAB *hp;
|
|
|
|
hp = (HTAB *)db->internal;
|
|
hp->error = 0;
|
|
return (0);
|
|
}
|
|
|
|
extern int
|
|
dbm_dirfno(db)
|
|
DBM *db;
|
|
{
|
|
return(((HTAB *)db->internal)->fp);
|
|
}
|