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 "dbwrap/dbwrap_rbt.h"
23 #include "talloc_dict.h"
27 struct db_context *db;
30 struct talloc_dict *talloc_dict_init(TALLOC_CTX *mem_ctx)
32 struct talloc_dict *result;
34 result = talloc(mem_ctx, struct talloc_dict);
38 result->db = db_open_rbt(result);
39 if (result->db == NULL) {
47 * Add a talloced object to the dict. Nulls out the pointer to indicate that
48 * the talloc ownership has been taken. If an object for "key" already exists,
49 * the existing object is talloc_free()ed and overwritten by the new
50 * object. If "data" is NULL, object for key "key" is deleted. Return false
54 bool talloc_dict_set(struct talloc_dict *dict, DATA_BLOB key, void *pdata)
56 struct db_record *rec;
57 NTSTATUS status = NT_STATUS_OK;
58 void *data = *(void **)pdata;
61 rec = dbwrap_fetch_locked(dict->db, talloc_tos(),
62 make_tdb_data(key.data, key.length));
67 value = dbwrap_record_get_value(rec);
69 if (value.dsize != 0) {
71 if (value.dsize != sizeof(void *)) {
75 old_data = *(void **)(value.dptr);
76 TALLOC_FREE(old_data);
78 status = dbwrap_record_delete(rec);
82 void *mydata = talloc_move(dict->db, &data);
83 *(void **)pdata = NULL;
84 status = dbwrap_record_store(rec,
85 make_tdb_data((uint8_t *)&mydata,
89 return NT_STATUS_IS_OK(status);
93 * Fetch a talloced object. If "mem_ctx!=NULL", talloc_move the object there
94 * and delete it from the dict.
97 void *talloc_dict_fetch(struct talloc_dict *dict, DATA_BLOB key,
100 struct db_record *rec;
104 rec = dbwrap_fetch_locked(dict->db, talloc_tos(),
105 make_tdb_data(key.data, key.length));
110 value = dbwrap_record_get_value(rec);
111 if (value.dsize != sizeof(void *)) {
115 result = *(void **)value.dptr;
117 if (mem_ctx != NULL) {
119 status = dbwrap_record_delete(rec);
120 if (!NT_STATUS_IS_OK(status)) {
124 result = talloc_move(mem_ctx, &result);
130 struct talloc_dict_traverse_state {
131 int (*fn)(DATA_BLOB key, void *data, void *private_data);
135 static int talloc_dict_traverse_fn(struct db_record *rec, void *private_data)
139 struct talloc_dict_traverse_state *state =
140 (struct talloc_dict_traverse_state *)private_data;
142 key = dbwrap_record_get_key(rec);
143 value = dbwrap_record_get_value(rec);
145 if (value.dsize != sizeof(void *)) {
148 return state->fn(data_blob_const(key.dptr, key.dsize),
149 *(void **)value.dptr, state->private_data);
153 * Traverse a talloc_dict. If "fn" returns non-null, quit the traverse
156 int talloc_dict_traverse(struct talloc_dict *dict,
157 int (*fn)(DATA_BLOB key, void *data,
161 struct talloc_dict_traverse_state state;
166 state.private_data = private_data;
167 status = dbwrap_traverse(dict->db, talloc_dict_traverse_fn, &state,
169 if (!NT_STATUS_IS_OK(status)) {