2 Unix SMB/CIFS implementation.
3 Little dictionary style data structure based on dbwrap_rbt
4 Copyright (C) Volker Lendecke 2009
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "talloc_dict.h"
25 struct db_context
*db
;
28 struct talloc_dict
*talloc_dict_init(TALLOC_CTX
*mem_ctx
)
30 struct talloc_dict
*result
;
32 result
= talloc(mem_ctx
, struct talloc_dict
);
36 result
->db
= db_open_rbt(result
);
37 if (result
->db
== NULL
) {
45 * Add a talloced object to the dict. Nulls out the pointer to indicate that
46 * the talloc ownership has been taken. If an object for "key" already exists,
47 * the existing object is talloc_free()ed and overwritten by the new
48 * object. If "data" is NULL, object for key "key" is deleted. Return false
52 bool talloc_dict_set(struct talloc_dict
*dict
, DATA_BLOB key
, void *pdata
)
54 struct db_record
*rec
;
55 NTSTATUS status
= NT_STATUS_OK
;
56 void *data
= *(void **)pdata
;
58 rec
= dict
->db
->fetch_locked(dict
->db
, talloc_tos(),
59 make_tdb_data(key
.data
, key
.length
));
63 if (rec
->value
.dsize
!= 0) {
65 if (rec
->value
.dsize
!= sizeof(void *)) {
69 old_data
= *(void **)(rec
->value
.dptr
);
70 TALLOC_FREE(old_data
);
72 status
= rec
->delete_rec(rec
);
76 void *mydata
= talloc_move(dict
->db
, &data
);
77 *(void **)pdata
= NULL
;
78 status
= rec
->store(rec
, make_tdb_data((uint8_t *)&mydata
,
82 return NT_STATUS_IS_OK(status
);
86 * Fetch a talloced object. If "mem_ctx!=NULL", talloc_move the object there
87 * and delete it from the dict.
90 void *talloc_dict_fetch(struct talloc_dict
*dict
, DATA_BLOB key
,
93 struct db_record
*rec
;
96 rec
= dict
->db
->fetch_locked(dict
->db
, talloc_tos(),
97 make_tdb_data(key
.data
, key
.length
));
101 if (rec
->value
.dsize
!= sizeof(void *)) {
105 result
= *(void **)rec
->value
.dptr
;
107 if (mem_ctx
!= NULL
) {
109 status
= rec
->delete_rec(rec
);
110 if (!NT_STATUS_IS_OK(status
)) {
114 result
= talloc_move(mem_ctx
, &result
);
120 struct talloc_dict_traverse_state
{
121 int (*fn
)(DATA_BLOB key
, void *data
, void *private_data
);
125 static int talloc_dict_traverse_fn(struct db_record
*rec
, void *private_data
)
127 struct talloc_dict_traverse_state
*state
=
128 (struct talloc_dict_traverse_state
*)private_data
;
130 if (rec
->value
.dsize
!= sizeof(void *)) {
133 return state
->fn(data_blob_const(rec
->key
.dptr
, rec
->key
.dsize
),
134 *(void **)rec
->value
.dptr
, state
->private_data
);
138 * Traverse a talloc_dict. If "fn" returns non-null, quit the traverse
141 int talloc_dict_traverse(struct talloc_dict
*dict
,
142 int (*fn
)(DATA_BLOB key
, void *data
,
146 struct talloc_dict_traverse_state state
;
148 state
.private_data
= private_data
;
149 return dict
->db
->traverse(dict
->db
, talloc_dict_traverse_fn
, &state
);