content: /**
   * Copyright (C) 2017 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.
   */
  
  package com.android.server.broadcastradio.hal2;
  
  import android.annotation.NonNull;
  import android.os.RemoteException;
  
  enum FrequencyBand {
      UNKNOWN,
      FM,
      AM_LW,
      AM_MW,
      AM_SW,
  };
  
  class Utils {
      private static final String TAG = "BcRadio2Srv.utils";
  
      static FrequencyBand getBand(int freq) {
          // keep in sync with hardware/interfaces/broadcastradio/common/utils2x/Utils.cpp
          if (freq < 30) return FrequencyBand.UNKNOWN;
          if (freq < 500) return FrequencyBand.AM_LW;
          if (freq < 1705) return FrequencyBand.AM_MW;
          if (freq < 30000) return FrequencyBand.AM_SW;
          if (freq < 60000) return FrequencyBand.UNKNOWN;
          if (freq < 110000) return FrequencyBand.FM;
          return FrequencyBand.UNKNOWN;
      }
  
      interface FuncThrowingRemoteException<T> {
          T exec() throws RemoteException;
      }
  
      static <T> T maybeRethrow(@NonNull FuncThrowingRemoteException<T> r) {
          try {
              return r.exec();
          } catch (RemoteException ex) {
              ex.rethrowFromSystemServer();
              return null;  // unreachable
          }
      }
  
      interface VoidFuncThrowingRemoteException {
          void exec() throws RemoteException;
      }
  
      static void maybeRethrow(@NonNull VoidFuncThrowingRemoteException r) {
          try {
              r.exec();
          } catch (RemoteException ex) {
              ex.rethrowFromSystemServer();
          }
      }
  }
  