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/*
Unix SMB/CIFS implementation.
tdb utility functions
Copyright (C) Andrew Tridgell 1992-2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _____LIB_UTIL_UTIL_TDB_H__
#define _____LIB_UTIL_UTIL_TDB_H__
/***************************************************************
Make a TDB_DATA and keep the const warning in one place
****************************************************************/
TDB_DATA make_tdb_data(const uint8_t *dptr, size_t dsize);
bool tdb_data_equal(TDB_DATA t1, TDB_DATA t2);
bool tdb_data_is_empty(TDB_DATA d);
TDB_DATA string_tdb_data(const char *string);
TDB_DATA string_term_tdb_data(const char *string);
/****************************************************************************
Lock a chain by string. Return non-zero if lock failed.
****************************************************************************/
int tdb_lock_bystring(struct tdb_context *tdb, const char *keyval);
/****************************************************************************
Unlock a chain by string.
****************************************************************************/
void tdb_unlock_bystring(struct tdb_context *tdb, const char *keyval);
/****************************************************************************
Read lock a chain by string. Return non-zero if lock failed.
****************************************************************************/
int tdb_read_lock_bystring(struct tdb_context *tdb, const char *keyval);
/****************************************************************************
Read unlock a chain by string.
****************************************************************************/
void tdb_read_unlock_bystring(struct tdb_context *tdb, const char *keyval);
/****************************************************************************
Fetch a int32_t value by a arbitrary blob key, return -1 if not found.
Output is int32_t in native byte order.
****************************************************************************/
int32_t tdb_fetch_int32_byblob(struct tdb_context *tdb, TDB_DATA key);
/****************************************************************************
Fetch a int32_t value by string key, return -1 if not found.
Output is int32_t in native byte order.
****************************************************************************/
int32_t tdb_fetch_int32(struct tdb_context *tdb, const char *keystr);
/****************************************************************************
Store a int32_t value by an arbitrary blob key, return 0 on success, -ve on failure.
Input is int32_t in native byte order. Output in tdb is in little-endian.
****************************************************************************/
int tdb_store_int32_byblob(struct tdb_context *tdb, TDB_DATA key, int32_t v);
/****************************************************************************
Store a int32_t value by string key, return 0 on success, -ve on failure.
Input is int32_t in native byte order. Output in tdb is in little-endian.
****************************************************************************/
int tdb_store_int32(struct tdb_context *tdb, const char *keystr, int32_t v);
/****************************************************************************
Fetch a uint32_t value by a arbitrary blob key, return -1 if not found.
Output is uint32_t in native byte order.
****************************************************************************/
bool tdb_fetch_uint32_byblob(struct tdb_context *tdb, TDB_DATA key, uint32_t *value);
/****************************************************************************
Fetch a uint32_t value by string key, return -1 if not found.
Output is uint32_t in native byte order.
****************************************************************************/
bool tdb_fetch_uint32(struct tdb_context *tdb, const char *keystr, uint32_t *value);
/****************************************************************************
Store a uint32_t value by an arbitrary blob key, return true on success, false on failure.
Input is uint32_t in native byte order. Output in tdb is in little-endian.
****************************************************************************/
bool tdb_store_uint32_byblob(struct tdb_context *tdb, TDB_DATA key, uint32_t value);
/****************************************************************************
Store a uint32_t value by string key, return true on success, false on failure.
Input is uint32_t in native byte order. Output in tdb is in little-endian.
****************************************************************************/
bool tdb_store_uint32(struct tdb_context *tdb, const char *keystr, uint32_t value);
/****************************************************************************
Store a buffer by a null terminated string key. Return 0 on success, -ve
on failure.
****************************************************************************/
int tdb_store_bystring(struct tdb_context *tdb, const char *keystr, TDB_DATA data, int flags);
/****************************************************************************
Fetch a buffer using a null terminated string key. Don't forget to call
free() on the result dptr.
****************************************************************************/
TDB_DATA tdb_fetch_bystring(struct tdb_context *tdb, const char *keystr);
/****************************************************************************
Delete an entry using a null terminated string key. 0 on success, -ve on err.
****************************************************************************/
int tdb_delete_bystring(struct tdb_context *tdb, const char *keystr);
/****************************************************************************
Atomic integer change. Returns old value. To create, set initial value in *oldval.
****************************************************************************/
int32_t tdb_change_int32_atomic(struct tdb_context *tdb, const char *keystr, int32_t *oldval, int32_t change_val);
/****************************************************************************
Atomic unsigned integer change. Returns old value. To create, set initial value in *oldval.
****************************************************************************/
bool tdb_change_uint32_atomic(struct tdb_context *tdb, const char *keystr, uint32_t *oldval, uint32_t change_val);
/****************************************************************************
Allow tdb_delete to be used as a tdb_traversal_fn.
****************************************************************************/
int tdb_traverse_delete_fn(struct tdb_context *the_tdb, TDB_DATA key, TDB_DATA dbuf,
void *state);
#endif /* _____LIB_UTIL_UTIL_TDB_H__ */
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