1 /*
2  * Copyright 2008 Google Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 typedef struct DatabaseConnection DatabaseConnection;
17 
18 /* Function that takes an SQL query string and sets results to an array of
19  * pointers with the result of the query.  The value returned specifies the
20  * number of items in the returned array of results.  The returned array of
21  * results are statically allocated and should not be deallocated using free()
22  */
23 typedef unsigned int (*QueryDatabase)(
24     DatabaseConnection* const connection, const char * const query_string,
25     void *** const results);
26 
27 // Connection to a database.
28 struct DatabaseConnection {
29     const char *url;
30     unsigned int port;
31     QueryDatabase query_database;
32 };
33 
34 // Connect to a database.
35 DatabaseConnection* connect_to_database(const char * const url,
36                                         const unsigned int port);
37 
38