diff options
| author | Jesse Morgan <jesse@jesterpm.net> | 2016-12-17 21:28:53 -0800 | 
|---|---|---|
| committer | Jesse Morgan <jesse@jesterpm.net> | 2016-12-17 21:28:53 -0800 | 
| commit | 54df2afaa61c6a03cbb4a33c9b90fa572b6d07b8 (patch) | |
| tree | 18147b92b969d25ffbe61935fb63035cac820dd0 /db-4.8.30/dbm/dbm.c | |
Berkeley DB 4.8 with rust build script for linux.
Diffstat (limited to 'db-4.8.30/dbm/dbm.c')
| -rw-r--r-- | db-4.8.30/dbm/dbm.c | 499 | 
1 files changed, 499 insertions, 0 deletions
| diff --git a/db-4.8.30/dbm/dbm.c b/db-4.8.30/dbm/dbm.c new file mode 100644 index 0000000..76a90e0 --- /dev/null +++ b/db-4.8.30/dbm/dbm.c @@ -0,0 +1,499 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1996-2009 Oracle.  All rights reserved. + */ +/* + * Copyright (c) 1990, 1993 + *	Margo Seltzer.  All rights reserved. + */ +/* + * 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. + * + * $Id$ + */ + +#define	DB_DBM_HSEARCH	1 +#include "db_config.h" + +#include "db_int.h" + +/* + * + * This package provides dbm and ndbm compatible interfaces to DB. + * + * EXTERN: #if DB_DBM_HSEARCH != 0 + * + * EXTERN: int	 __db_ndbm_clearerr __P((DBM *)); + * EXTERN: void	 __db_ndbm_close __P((DBM *)); + * EXTERN: int	 __db_ndbm_delete __P((DBM *, datum)); + * EXTERN: int	 __db_ndbm_dirfno __P((DBM *)); + * EXTERN: int	 __db_ndbm_error __P((DBM *)); + * EXTERN: datum __db_ndbm_fetch __P((DBM *, datum)); + * EXTERN: datum __db_ndbm_firstkey __P((DBM *)); + * EXTERN: datum __db_ndbm_nextkey __P((DBM *)); + * EXTERN: DBM	*__db_ndbm_open __P((const char *, int, int)); + * EXTERN: int	 __db_ndbm_pagfno __P((DBM *)); + * EXTERN: int	 __db_ndbm_rdonly __P((DBM *)); + * EXTERN: int	 __db_ndbm_store __P((DBM *, datum, datum, int)); + * + * EXTERN: int	 __db_dbm_close __P((void)); + * EXTERN: int	 __db_dbm_delete __P((datum)); + * EXTERN: datum __db_dbm_fetch __P((datum)); + * EXTERN: datum __db_dbm_firstkey __P((void)); + * EXTERN: int	 __db_dbm_init __P((char *)); + * EXTERN: datum __db_dbm_nextkey __P((datum)); + * EXTERN: int	 __db_dbm_store __P((datum, datum)); + * + * EXTERN: #endif + */ + +/* + * The DBM routines, which call the NDBM routines. + */ +static DBM *__cur_db; + +static void __db_no_open __P((void)); + +int +__db_dbm_init(file) +	char *file; +{ +	if (__cur_db != NULL) +		dbm_close(__cur_db); +	if ((__cur_db = dbm_open(file, O_CREAT | O_RDWR, DB_MODE_600)) != NULL) +		return (0); +	if ((__cur_db = dbm_open(file, O_RDONLY, 0)) != NULL) +		return (0); +	return (-1); +} + +int +__db_dbm_close() +{ +	if (__cur_db != NULL) { +		dbm_close(__cur_db); +		__cur_db = NULL; +	} +	return (0); +} + +datum +__db_dbm_fetch(key) +	datum key; +{ +	datum item; + +	if (__cur_db == NULL) { +		__db_no_open(); +		item.dptr = NULL; +		item.dsize = 0; +		return (item); +	} +	return (dbm_fetch(__cur_db, key)); +} + +datum +__db_dbm_firstkey() +{ +	datum item; + +	if (__cur_db == NULL) { +		__db_no_open(); +		item.dptr = NULL; +		item.dsize = 0; +		return (item); +	} +	return (dbm_firstkey(__cur_db)); +} + +datum +__db_dbm_nextkey(key) +	datum key; +{ +	datum item; + +	COMPQUIET(key.dsize, 0); + +	if (__cur_db == NULL) { +		__db_no_open(); +		item.dptr = NULL; +		item.dsize = 0; +		return (item); +	} +	return (dbm_nextkey(__cur_db)); +} + +int +__db_dbm_delete(key) +	datum key; +{ +	if (__cur_db == NULL) { +		__db_no_open(); +		return (-1); +	} +	return (dbm_delete(__cur_db, key)); +} + +int +__db_dbm_store(key, dat) +	datum key, dat; +{ +	if (__cur_db == NULL) { +		__db_no_open(); +		return (-1); +	} +	return (dbm_store(__cur_db, key, dat, DBM_REPLACE)); +} + +static void +__db_no_open() +{ +	(void)fprintf(stderr, "dbm: no open database.\n"); +} + +/* + * This package provides dbm and ndbm compatible interfaces to DB. + * + * The NDBM routines, which call the DB routines. + */ +/* + * Returns: + *	*DBM on success + *	 NULL on failure + */ +DBM * +__db_ndbm_open(file, oflags, mode) +	const char *file; +	int oflags, mode; +{ +	DB *dbp; +	DBC *dbc; +	int ret; +	char path[DB_MAXPATHLEN]; + +	/* +	 * !!! +	 * Don't use sprintf(3)/snprintf(3) -- the former is dangerous, and +	 * the latter isn't standard, and we're manipulating strings handed +	 * us by the application. +	 */ +	if (strlen(file) + strlen(DBM_SUFFIX) + 1 > sizeof(path)) { +		__os_set_errno(ENAMETOOLONG); +		return (NULL); +	} +	(void)strcpy(path, file); +	(void)strcat(path, DBM_SUFFIX); +	if ((ret = db_create(&dbp, NULL, 0)) != 0) { +		__os_set_errno(ret); +		return (NULL); +	} + +	/* +	 * !!! +	 * The historic ndbm library corrected for opening O_WRONLY. +	 */ +	if (oflags & O_WRONLY) { +		oflags &= ~O_WRONLY; +		oflags |= O_RDWR; +	} + +	if ((ret = dbp->set_pagesize(dbp, 4096)) != 0 || +	    (ret = dbp->set_h_ffactor(dbp, 40)) != 0 || +	    (ret = dbp->set_h_nelem(dbp, 1)) != 0 || +	    (ret = dbp->open(dbp, NULL, +	    path, NULL, DB_HASH, __db_openflags(oflags), mode)) != 0) { +		__os_set_errno(ret); +		return (NULL); +	} + +	if ((ret = dbp->cursor(dbp, NULL, &dbc, 0)) != 0) { +		(void)dbp->close(dbp, 0); +		__os_set_errno(ret); +		return (NULL); +	} + +	return ((DBM *)dbc); +} + +/* + * Returns: + *	Nothing. + */ +void +__db_ndbm_close(dbm) +	DBM *dbm; +{ +	DBC *dbc; + +	dbc = (DBC *)dbm; + +	(void)dbc->dbp->close(dbc->dbp, 0); +} + +/* + * Returns: + *	DATUM on success + *	NULL on failure + */ +datum +__db_ndbm_fetch(dbm, key) +	DBM *dbm; +	datum key; +{ +	DBC *dbc; +	DBT _key, _data; +	datum data; +	int ret; + +	dbc = (DBC *)dbm; + +	DB_INIT_DBT(_key, key.dptr, key.dsize); +	memset(&_data, 0, sizeof(DBT)); + +	/* +	 * Note that we can't simply use the dbc we have to do a get/SET, +	 * because that cursor is the one used for sequential iteration and +	 * it has to remain stable in the face of intervening gets and puts. +	 */ +	if ((ret = dbc->dbp->get(dbc->dbp, NULL, &_key, &_data, 0)) == 0) { +		data.dptr = _data.data; +		data.dsize = (int)_data.size; +	} else { +		data.dptr = NULL; +		data.dsize = 0; +		if (ret == DB_NOTFOUND) +			__os_set_errno(ENOENT); +		else { +			__os_set_errno(ret); +			F_SET(dbc->dbp, DB_AM_DBM_ERROR); +		} +	} +	return (data); +} + +/* + * Returns: + *	DATUM on success + *	NULL on failure + */ +datum +__db_ndbm_firstkey(dbm) +	DBM *dbm; +{ +	DBC *dbc; +	DBT _key, _data; +	datum key; +	int ret; + +	dbc = (DBC *)dbm; + +	memset(&_key, 0, sizeof(DBT)); +	memset(&_data, 0, sizeof(DBT)); + +	if ((ret = dbc->get(dbc, &_key, &_data, DB_FIRST)) == 0) { +		key.dptr = _key.data; +		key.dsize = (int)_key.size; +	} else { +		key.dptr = NULL; +		key.dsize = 0; +		if (ret == DB_NOTFOUND) +			__os_set_errno(ENOENT); +		else { +			__os_set_errno(ret); +			F_SET(dbc->dbp, DB_AM_DBM_ERROR); +		} +	} +	return (key); +} + +/* + * Returns: + *	DATUM on success + *	NULL on failure + */ +datum +__db_ndbm_nextkey(dbm) +	DBM *dbm; +{ +	DBC *dbc; +	DBT _key, _data; +	datum key; +	int ret; + +	dbc = (DBC *)dbm; + +	memset(&_key, 0, sizeof(DBT)); +	memset(&_data, 0, sizeof(DBT)); + +	if ((ret = dbc->get(dbc, &_key, &_data, DB_NEXT)) == 0) { +		key.dptr = _key.data; +		key.dsize = (int)_key.size; +	} else { +		key.dptr = NULL; +		key.dsize = 0; +		if (ret == DB_NOTFOUND) +			__os_set_errno(ENOENT); +		else { +			__os_set_errno(ret); +			F_SET(dbc->dbp, DB_AM_DBM_ERROR); +		} +	} +	return (key); +} + +/* + * Returns: + *	 0 on success + *	<0 failure + */ +int +__db_ndbm_delete(dbm, key) +	DBM *dbm; +	datum key; +{ +	DBC *dbc; +	DBT _key; +	int ret; + +	dbc = (DBC *)dbm; + +	DB_INIT_DBT(_key, key.dptr, key.dsize); + +	if ((ret = dbc->dbp->del(dbc->dbp, NULL, &_key, 0)) == 0) +		return (0); + +	if (ret == DB_NOTFOUND) +		__os_set_errno(ENOENT); +	else { +		__os_set_errno(ret); +		F_SET(dbc->dbp, DB_AM_DBM_ERROR); +	} +	return (-1); +} + +/* + * Returns: + *	 0 on success + *	<0 failure + *	 1 if DBM_INSERT and entry exists + */ +int +__db_ndbm_store(dbm, key, data, flags) +	DBM *dbm; +	datum key, data; +	int flags; +{ +	DBC *dbc; +	DBT _key, _data; +	int ret; + +	dbc = (DBC *)dbm; + +	DB_INIT_DBT(_key, key.dptr, key.dsize); +	DB_INIT_DBT(_data, data.dptr, data.dsize); + +	if ((ret = dbc->dbp->put(dbc->dbp, NULL, +	    &_key, &_data, flags == DBM_INSERT ? DB_NOOVERWRITE : 0)) == 0) +		return (0); + +	if (ret == DB_KEYEXIST) +		return (1); + +	__os_set_errno(ret); +	F_SET(dbc->dbp, DB_AM_DBM_ERROR); +	return (-1); +} + +int +__db_ndbm_error(dbm) +	DBM *dbm; +{ +	DBC *dbc; + +	dbc = (DBC *)dbm; + +	return (F_ISSET(dbc->dbp, DB_AM_DBM_ERROR)); +} + +int +__db_ndbm_clearerr(dbm) +	DBM *dbm; +{ +	DBC *dbc; + +	dbc = (DBC *)dbm; + +	F_CLR(dbc->dbp, DB_AM_DBM_ERROR); +	return (0); +} + +/* + * Returns: + *	1 if read-only + *	0 if not read-only + */ +int +__db_ndbm_rdonly(dbm) +	DBM *dbm; +{ +	DBC *dbc; + +	dbc = (DBC *)dbm; + +	return (F_ISSET(dbc->dbp, DB_AM_RDONLY) ? 1 : 0); +} + +/* + * XXX + * We only have a single file descriptor that we can return, not two.  Return + * the same one for both files.  Hopefully, the user is using it for locking + * and picked one to use at random. + */ +int +__db_ndbm_dirfno(dbm) +	DBM *dbm; +{ +	return (dbm_pagfno(dbm)); +} + +int +__db_ndbm_pagfno(dbm) +	DBM *dbm; +{ +	DBC *dbc; +	int fd; + +	dbc = (DBC *)dbm; + +	(void)dbc->dbp->fd(dbc->dbp, &fd); +	return (fd); +} | 
