Break out tHCI_ROLE type into separate file

/*

 * Copyright 2021 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.

 */

#pragma once

#include <string>

/* HCI role definitions */

typedef enum : uint8_t {

  HCI_ROLE_CENTRAL = 0x00,

  HCI_ROLE_PERIPHERAL = 0x01,

  HCI_ROLE_UNKNOWN = 0xff,

} tHCI_ROLE;

inline std::string hci_role_text(const tHCI_ROLE& role) {

  switch (role) {

    case HCI_ROLE_CENTRAL:

      return std::string("central");

    case HCI_ROLE_PERIPHERAL:

      return std::string("peripheral");

    default:

      return std::string("unknown");

  }

}

inline tHCI_ROLE to_hci_role(const uint8_t& role) {

  if (role == 0)

    return HCI_ROLE_CENTRAL;

  else if (role == 1)

    return HCI_ROLE_PERIPHERAL;

  else

    return HCI_ROLE_UNKNOWN;

}

typedef tHCI_ROLE hci_role_t;         // LEGACY

const auto RoleText = hci_role_text;  // LEGACY