Commit e50ad9fb authored by Vaibhav Gupta's avatar Vaibhav Gupta Committed by Corinna Vinschen

Port ndbm

parent 942f60d7
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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.
*
* @(#)ndbm.h 8.1 (Berkeley) 6/2/93
* $FreeBSD$ : src/include/ndbm.h
* Nov 20 19:45:28 2017 UTC by pfg
* SVN Revision 326024
*/
#ifndef _NDBM_H_
#define _NDBM_H_
/* #include <db.h> */
/*
* The above header-file is directly included in `newlib/libc/search/ndbm.c`
* as `db.h` is present in form of `db_local.h`, inside `newlib/libc/search`
* directory and not in `newlib/libc/include`.
* Necessary data-types are mentioned in form of forward-declarations
*/
/* Map dbm interface onto db(3). */
#define DBM_RDONLY O_RDONLY
/* Flags to dbm_store(). */
#define DBM_INSERT 0
#define DBM_REPLACE 1
/*
* The db(3) support for ndbm always appends this suffix to the
* file name to avoid overwriting the user's original database.
*/
#define DBM_SUFFIX ".db"
typedef struct {
void *dptr;
int dsize; /* XXX Should be size_t according to 1003.1-2008. */
} datum;
struct __db; /* Forward-declaration */
typedef struct __db DB; /* Forward-declaration */
typedef DB DBM;
#define dbm_pagfno(a) DBM_PAGFNO_NOT_AVAILABLE
__BEGIN_DECLS
int dbm_clearerr(DBM *);
void dbm_close(DBM *);
int dbm_delete(DBM *, datum);
int dbm_error(DBM *);
datum dbm_fetch(DBM *, datum);
datum dbm_firstkey(DBM *);
#if __BSD_VISIBLE
long dbm_forder(DBM *, datum);
#endif
datum dbm_nextkey(DBM *);
DBM *dbm_open(const char *, int, mode_t);
int dbm_store(DBM *, datum, datum, int);
#if __BSD_VISIBLE
int dbm_dirfno(DBM *);
#endif
__END_DECLS
#endif /* !_NDBM_H_ */
......@@ -9,6 +9,7 @@ GENERAL_SOURCES = \
db_local.h \
extern.h \
hash.h \
ndbm.c \
page.h \
qsort.c
......
/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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 defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)ndbm.c 8.4 (Berkeley) 7/21/94";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$ : src/lib/libc/db/hash/ndbm.c Nov 20 19:49:47 2017 UTC by pfg - SVN Revision 326025");
/*
* 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 <errno.h>
#include <ndbm.h>
#include "hash.h"
#define __DBINTERFACE_PRIVATE /* activate prototypes from db_local.h */
#include "db_local.h"
/*
* Returns:
* *DBM on success
* NULL on failure
*/
extern DBM *
dbm_open(const char *file, int flags, mode_t mode)
{
HASHINFO info;
char path[MAXPATHLEN];
info.bsize = 4096;
info.ffactor = 40;
info.nelem = 1;
info.cachesize = 0;
info.hash = NULL;
info.lorder = 0;
if( strlen(file) >= sizeof(path) - strlen(DBM_SUFFIX)) {
errno = ENAMETOOLONG;
return(NULL);
}
(void)strcpy(path, file);
(void)strcat(path, DBM_SUFFIX);
return ((DBM *)__hash_open(path, flags, mode, 0, &info));
}
extern void
dbm_close(DBM *db)
{
(void)(db->close)(db);
}
/*
* Returns:
* DATUM on success
* NULL on failure
*/
extern 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 = dbtretdata.size;
return (retdata);
}
/*
* Returns:
* DATUM on success
* NULL on failure
*/
extern 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 = dbtretkey.size;
return (retkey);
}
/*
* Returns:
* DATUM on success
* NULL on failure
*/
extern 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 = dbtretkey.size;
return (retkey);
}
/*
* Returns:
* 0 on success
* <0 failure
*/
extern 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
*/
extern 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,
(flags == DBM_INSERT) ? R_NOOVERWRITE : 0));
}
extern int
dbm_error(DBM *db)
{
HTAB *hp;
hp = (HTAB *)db->internal;
return (hp->error);
}
extern int
dbm_clearerr(DBM *db)
{
HTAB *hp;
hp = (HTAB *)db->internal;
hp->error = 0;
return (0);
}
extern int
dbm_dirfno(DBM *db)
{
return(((HTAB *)db->internal)->fp);
}
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