1 /*
2  * Copyright (C) 2020 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 #pragma once
18 
19 #include <android/hardware/automotive/can/1.0/types.h>
20 #include <libprotocan/Signal.h>
21 
22 namespace android::hardware::automotive::protocan {
23 
24 class Checksum {
25  public:
26   using formula = std::function<Signal::value(const can::V1_0::CanMessage&)>;
27 
28   Checksum(Signal signal, formula f);
29 
30   void update(can::V1_0::CanMessage& msg) const;
31 
32  private:
33   const Signal mSignal;
34   const formula mFormula;
35 };
36 
37 }  // namespace android::hardware::automotive::protocan
38