mirror of
https://github.com/kidfromjupiter/nearby.git
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93 lines
2.8 KiB
C++
93 lines
2.8 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 "internal/platform/bluetooth_utils.h"
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#include <cstdint>
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#include <string>
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#include "absl/strings/string_view.h"
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#include "internal/platform/byte_array.h"
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#include "internal/platform/mac_address.h"
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namespace nearby {
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namespace {
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uint64_t ByteArrayToUint64(const ByteArray& byte_array) {
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if (byte_array.size() != BluetoothUtils::kBluetoothMacAddressLength) {
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return 0;
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}
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uint64_t result = 0;
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for (int i = 0; i < byte_array.size(); i++) {
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result <<= 8;
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result |= ((static_cast<uint64_t>(byte_array.data()[i])) & 0xFF);
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}
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return result;
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}
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ByteArray Uint64AddressToByteArray(uint64_t address) {
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ByteArray address_bytes(BluetoothUtils::kBluetoothMacAddressLength);
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address_bytes.data()[0] = (address >> 40) & 0xFF;
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address_bytes.data()[1] = (address >> 32) & 0xFF;
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address_bytes.data()[2] = (address >> 24) & 0xFF;
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address_bytes.data()[3] = (address >> 16) & 0xFF;
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address_bytes.data()[4] = (address >> 8) & 0xFF;
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address_bytes.data()[5] = address & 0xFF;
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return address_bytes;
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}
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} // namespace
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std::string BluetoothUtils::ToString(const ByteArray& bluetooth_mac_address) {
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MacAddress mac_address;
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if (!MacAddress::FromUint64(ByteArrayToUint64(bluetooth_mac_address),
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mac_address) ||
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!mac_address.IsSet()) {
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return "";
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}
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return mac_address.ToString();
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}
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ByteArray BluetoothUtils::FromString(absl::string_view bluetooth_mac_address) {
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MacAddress mac_address;
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if (!MacAddress::FromString(bluetooth_mac_address, mac_address) ||
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!mac_address.IsSet()) {
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return ByteArray();
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}
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return Uint64AddressToByteArray(mac_address.address());
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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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return ByteArrayToUint64(bluetooth_mac_address_bytes) == 0;
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}
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std::string BluetoothUtils::FromNumber(std::uint64_t address) {
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MacAddress mac_address;
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if (!MacAddress::FromUint64(address, mac_address) || !mac_address.IsSet()) {
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return "";
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}
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return mac_address.ToString();
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}
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std::uint64_t BluetoothUtils::ToNumber(absl::string_view address) {
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MacAddress mac_address;
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if (!MacAddress::FromString(address, mac_address)) {
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return 0;
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}
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return mac_address.address();
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}
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} // namespace nearby
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