[PATCH v4] Port ndbm
Vaibhav Gupta
vaibhavgupta40 at gmail.com
Wed Jul 10 04:49:23 UTC 2019
On Wed, Jul 10, 2019, 8:54 AM Aditya Upadhyay <aadit0402 at gmail.com> wrote:
>
>
> On Tue, Jul 9, 2019, 11:49 PM Vaibhav Gupta <vaibhavgupta40 at gmail.com>
> wrote:
>
>> ---
>> newlib/libc/include/ndbm.h | 91 ++++++++++++++
>> newlib/libc/search/Makefile.am | 1 +
>> newlib/libc/search/ndbm.c | 220 +++++++++++++++++++++++++++++++++
>> 3 files changed, 312 insertions(+)
>> create mode 100644 newlib/libc/include/ndbm.h
>> create mode 100644 newlib/libc/search/ndbm.c
>>
>> diff --git a/newlib/libc/include/ndbm.h b/newlib/libc/include/ndbm.h
>> new file mode 100644
>> index 000000000..6761d4897
>> --- /dev/null
>> +++ b/newlib/libc/include/ndbm.h
>> @@ -0,0 +1,91 @@
>> +/*-
>> + * 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
>> + * $FreeBSD$
>> + */
>> +
>> +#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`, that too 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_ */
>> diff --git a/newlib/libc/search/Makefile.am
>> b/newlib/libc/search/Makefile.am
>> index 98920c3f4..a61107fb9 100644
>> --- a/newlib/libc/search/Makefile.am
>> +++ b/newlib/libc/search/Makefile.am
>> @@ -9,6 +9,7 @@ GENERAL_SOURCES = \
>> db_local.h \
>> extern.h \
>> hash.h \
>> + ndbm.c \
>> page.h \
>> qsort.c
>>
>> diff --git a/newlib/libc/search/ndbm.c b/newlib/libc/search/ndbm.c
>> new file mode 100644
>> index 000000000..7226be1d1
>> --- /dev/null
>> +++ b/newlib/libc/search/ndbm.c
>> @@ -0,0 +1,220 @@
>> +/*-
>> + * 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");
>> +
>> +/*
>> + * 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"
>> +
>> +#ifndef __DBINTERFACE_PRIVATE
>> +#define __DBINTERFACE_PRIVATE
>> +#endif
>> +
>
> Here you do not have dbinterface_private.h.
> You are accessing db_local private prototypes. So for this guard #define
> __DBINTERFACE_PRIVATE, You will have to specify db_local.h.
>
> See this example:
> https://github.com/mirror/newlib-cygwin/blob/bd993df0e6aee5080a791b54cb0074ad76bab681/newlib/libc/search/hash.c
>
> +#include "db_local.h"
>>
> You mean I just need to add this comment "/* activate db_local.h
prototypes */"? If that is it, i will do it amd semd a new patch for
verification.
> +
>> +/*
>> + * 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);
>> +}
>> --
>>
> Just make this change and send a fresh patch to newlib mailing list and
> also specify the freebsd source of ndbm.h and ndbm.c in a patch format
> separately from the your ndbm patch.
>
Sources of ndbm.h and ndbm.c in a patch format? Can you guide a bit?
>
> 2.21.0
>>
>
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