/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <libprotocan/Checksum.h>

namespace android::hardware::automotive::protocan {

Checksum::Checksum(Signal signal, formula f) : mSignal(signal), mFormula(f) {}

void Checksum::update(can::V1_0::CanMessage& msg) const {
  mSignal.set(msg, 0);
  mSignal.set(msg, mFormula(msg) % (mSignal.maxValue + 1));
}

}  // namespace android::hardware::automotive::protocan