mirror of
https://github.com/kidfromjupiter/nearby.git
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76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "platform_v2/base/bluetooth_utils.h"
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#include "absl/strings/escaping.h"
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#include "absl/strings/str_format.h"
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namespace location {
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namespace nearby {
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std::string BluetoothUtils::ToString(const ByteArray& bluetooth_mac_address) {
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std::string colon_delimited_string;
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if (bluetooth_mac_address.size() != kBluetoothMacAddressLength)
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return colon_delimited_string;
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if (IsBluetoothMacAddressUnset(bluetooth_mac_address))
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return colon_delimited_string;
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for (auto byte : std::string(bluetooth_mac_address)) {
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if (!colon_delimited_string.empty())
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absl::StrAppend(&colon_delimited_string, ":");
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absl::StrAppend(&colon_delimited_string, absl::StrFormat("%02X", byte));
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}
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return colon_delimited_string;
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}
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ByteArray BluetoothUtils::FromString(absl::string_view bluetooth_mac_address) {
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std::string bt_mac_address(bluetooth_mac_address);
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// Remove the colon delimiters.
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bt_mac_address.erase(
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std::remove(bt_mac_address.begin(), bt_mac_address.end(), ':'),
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bt_mac_address.end());
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// If the bluetooth mac address is invalid (wrong size), return a null byte
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// array.
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if (bt_mac_address.length() != kBluetoothMacAddressLength * 2) {
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return ByteArray();
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}
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// Convert to bytes. If MAC Address bytes are unset, return a null byte array.
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auto bt_mac_address_string(absl::HexStringToBytes(bt_mac_address));
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auto bt_mac_address_bytes =
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ByteArray(bt_mac_address_string.data(), bt_mac_address_string.size());
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if (IsBluetoothMacAddressUnset(bt_mac_address_bytes)) {
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return ByteArray();
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}
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return bt_mac_address_bytes;
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}
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bool BluetoothUtils::IsBluetoothMacAddressUnset(
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const ByteArray& bluetooth_mac_address_bytes) {
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for (int i = 0; i < bluetooth_mac_address_bytes.size(); i++) {
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if (bluetooth_mac_address_bytes.data()[i] != 0) {
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return false;
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}
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}
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return true;
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}
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} // namespace nearby
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} // namespace location
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