1 /*
2  * Copyright (C) 2018 The Android Open Source Project
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 
17 #ifndef ANDROID_HARDWARE_VERSION_MACRO_H
18 #define ANDROID_HARDWARE_VERSION_MACRO_H
19 
20 #if !defined(MAJOR_VERSION) || !defined(MINOR_VERSION)
21 #error "MAJOR_VERSION and MINOR_VERSION must be defined"
22 #endif
23 
24 /** Allows macro expansion for x and add surrounding `<>`.
25  * Is intended to be used for version dependant includes as
26  * `#include` do not macro expand if starting with < or "
27  * Example usage:
28  *      #include PATH(path/to/FILE_VERSION/file)
29  * @note: uses the implementation-define "Computed Includes" feature.
30  */
31 #define PATH(x) <x>
32 
33 #define CONCAT_3(a, b, c) a##b##c
34 #define EXPAND_CONCAT_3(a, b, c) CONCAT_3(a, b, c)
35 /** The directory name of the version: <major>.<minor> */
36 #define FILE_VERSION EXPAND_CONCAT_3(MAJOR_VERSION, ., MINOR_VERSION)
37 
38 #define CONCAT_4(a, b, c, d) a##b##c##d
39 #define EXPAND_CONCAT_4(a, b, c, d) CONCAT_4(a, b, c, d)
40 /** The c++ namespace of the version: V<major>_<minor> */
41 #define CPP_VERSION EXPAND_CONCAT_4(V, MAJOR_VERSION, _, MINOR_VERSION)
42 
43 #endif  // ANDROID_HARDWARE_VERSION_MACRO_H
44