Port ndbm
This commit is contained in:
Vaibhav Gupta
Corinna Vinschen
parent
942f60d714
commit
e50ad9fbdc
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@ -0,0 +1,93 @@
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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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* @(#)ndbm.h 8.1 (Berkeley) 6/2/93
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* $FreeBSD$ : src/include/ndbm.h
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* Nov 20 19:45:28 2017 UTC by pfg
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* SVN Revision 326024
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*/
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#ifndef _NDBM_H_
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#define _NDBM_H_
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/* #include <db.h> */
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/*
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* The above header-file is directly included in `newlib/libc/search/ndbm.c`
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* as `db.h` is present in form of `db_local.h`, inside `newlib/libc/search`
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* directory and not in `newlib/libc/include`.
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* Necessary data-types are mentioned in form of forward-declarations
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*/
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/* Map dbm interface onto db(3). */
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#define DBM_RDONLY O_RDONLY
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/* Flags to dbm_store(). */
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#define DBM_INSERT 0
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#define DBM_REPLACE 1
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/*
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* The db(3) support for ndbm always appends this suffix to the
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* file name to avoid overwriting the user's original database.
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*/
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#define DBM_SUFFIX ".db"
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typedef struct {
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void *dptr;
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int dsize; /* XXX Should be size_t according to 1003.1-2008. */
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} datum;
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struct __db; /* Forward-declaration */
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typedef struct __db DB; /* Forward-declaration */
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typedef DB DBM;
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#define dbm_pagfno(a) DBM_PAGFNO_NOT_AVAILABLE
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__BEGIN_DECLS
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int dbm_clearerr(DBM *);
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void dbm_close(DBM *);
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int dbm_delete(DBM *, datum);
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int dbm_error(DBM *);
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datum dbm_fetch(DBM *, datum);
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datum dbm_firstkey(DBM *);
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#if __BSD_VISIBLE
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long dbm_forder(DBM *, datum);
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#endif
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datum dbm_nextkey(DBM *);
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DBM *dbm_open(const char *, int, mode_t);
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int dbm_store(DBM *, datum, datum, int);
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#if __BSD_VISIBLE
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int dbm_dirfno(DBM *);
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#endif
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__END_DECLS
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#endif /* !_NDBM_H_ */
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@ -9,6 +9,7 @@ GENERAL_SOURCES = \
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db_local.h \
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extern.h \
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hash.h \
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ndbm.c \
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page.h \
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qsort.c
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@ -0,0 +1,217 @@
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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 defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)ndbm.c 8.4 (Berkeley) 7/21/94";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$ : src/lib/libc/db/hash/ndbm.c Nov 20 19:49:47 2017 UTC by pfg - SVN Revision 326025");
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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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#include <sys/param.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <ndbm.h>
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#include "hash.h"
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#define __DBINTERFACE_PRIVATE /* activate prototypes from db_local.h */
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#include "db_local.h"
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/*
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* Returns:
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* *DBM on success
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* NULL on failure
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*/
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extern DBM *
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dbm_open(const char *file, int flags, mode_t mode)
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{
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HASHINFO info;
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char path[MAXPATHLEN];
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info.bsize = 4096;
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info.ffactor = 40;
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info.nelem = 1;
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info.cachesize = 0;
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info.hash = NULL;
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info.lorder = 0;
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if( strlen(file) >= sizeof(path) - strlen(DBM_SUFFIX)) {
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errno = ENAMETOOLONG;
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return(NULL);
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}
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(void)strcpy(path, file);
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(void)strcat(path, DBM_SUFFIX);
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return ((DBM *)__hash_open(path, flags, mode, 0, &info));
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}
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extern void
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dbm_close(DBM *db)
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{
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(void)(db->close)(db);
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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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extern 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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extern 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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extern 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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extern 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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extern 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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(flags == DBM_INSERT) ? R_NOOVERWRITE : 0));
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}
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extern int
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dbm_error(DBM *db)
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{
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HTAB *hp;
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hp = (HTAB *)db->internal;
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return (hp->error);
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}
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extern int
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dbm_clearerr(DBM *db)
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{
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HTAB *hp;
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hp = (HTAB *)db->internal;
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hp->error = 0;
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return (0);
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}
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extern int
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dbm_dirfno(DBM *db)
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{
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return(((HTAB *)db->internal)->fp);
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}
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