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/>.
21 #include "dbwrap/dbwrap.h"
22 #include "talloc_dict.h"
26 struct db_context *db;
29 struct talloc_dict *talloc_dict_init(TALLOC_CTX *mem_ctx)
31 struct talloc_dict *result;
33 result = talloc(mem_ctx, struct talloc_dict);
37 result->db = db_open_rbt(result);
38 if (result->db == NULL) {
46 * Add a talloced object to the dict. Nulls out the pointer to indicate that
47 * the talloc ownership has been taken. If an object for "key" already exists,
48 * the existing object is talloc_free()ed and overwritten by the new
49 * object. If "data" is NULL, object for key "key" is deleted. Return false
53 bool talloc_dict_set(struct talloc_dict *dict, DATA_BLOB key, void *pdata)
55 struct db_record *rec;
56 NTSTATUS status = NT_STATUS_OK;
57 void *data = *(void **)pdata;
59 rec = dict->db->fetch_locked(dict->db, talloc_tos(),
60 make_tdb_data(key.data, key.length));
64 if (rec->value.dsize != 0) {
66 if (rec->value.dsize != sizeof(void *)) {
70 old_data = *(void **)(rec->value.dptr);
71 TALLOC_FREE(old_data);
73 status = rec->delete_rec(rec);
77 void *mydata = talloc_move(dict->db, &data);
78 *(void **)pdata = NULL;
79 status = rec->store(rec, make_tdb_data((uint8_t *)&mydata,
83 return NT_STATUS_IS_OK(status);
87 * Fetch a talloced object. If "mem_ctx!=NULL", talloc_move the object there
88 * and delete it from the dict.
91 void *talloc_dict_fetch(struct talloc_dict *dict, DATA_BLOB key,
94 struct db_record *rec;
97 rec = dict->db->fetch_locked(dict->db, talloc_tos(),
98 make_tdb_data(key.data, key.length));
102 if (rec->value.dsize != sizeof(void *)) {
106 result = *(void **)rec->value.dptr;
108 if (mem_ctx != NULL) {
110 status = rec->delete_rec(rec);
111 if (!NT_STATUS_IS_OK(status)) {
115 result = talloc_move(mem_ctx, &result);
121 struct talloc_dict_traverse_state {
122 int (*fn)(DATA_BLOB key, void *data, void *private_data);
126 static int talloc_dict_traverse_fn(struct db_record *rec, void *private_data)
128 struct talloc_dict_traverse_state *state =
129 (struct talloc_dict_traverse_state *)private_data;
131 if (rec->value.dsize != sizeof(void *)) {
134 return state->fn(data_blob_const(rec->key.dptr, rec->key.dsize),
135 *(void **)rec->value.dptr, state->private_data);
139 * Traverse a talloc_dict. If "fn" returns non-null, quit the traverse
142 int talloc_dict_traverse(struct talloc_dict *dict,
143 int (*fn)(DATA_BLOB key, void *data,
147 struct talloc_dict_traverse_state state;
149 state.private_data = private_data;
150 return dict->db->traverse(dict->db, talloc_dict_traverse_fn, &state);