Roll forward to cl/338482889

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I9850950db8bd84f0904ea1a413151887f52098cf

cpp/platform/base/bluetooth_utils.h

@@ -0,0 +1,32 @@
+#ifndef PLATFORM_BASE_BLUETOOTH_UTILS_H_
+#define PLATFORM_BASE_BLUETOOTH_UTILS_H_
+
+#include "platform/base/byte_array.h"
+#include "absl/strings/string_view.h"
+
+namespace location {
+namespace nearby {
+
+class BluetoothUtils {
+ public:
+  static constexpr int kBluetoothMacAddressLength = 6;
+
+  // Converts a Bluetooth MAC address from byte array to String format. Returns
+  // empty if input byte array is not of correct format.
+  // e.g. {-84, 55, 67, -68, -87, 40} -> "AC:37:43:BC:A9:28".
+  static std::string ToString(const ByteArray& bluetooth_mac_address);
+
+  // Converts a Bluetooth MAC address from String format to byte array. Returns
+  // empty if input string is not of correct format.
+  // e.g. "AC:37:43:BC:A9:28" -> {-84, 55, 67, -68, -87, 40}.
+  static ByteArray FromString(absl::string_view bluetooth_mac_address);
+
+  // Checks if a Bluetooth MAC address is zero for every byte.
+  static bool IsBluetoothMacAddressUnset(
+      const ByteArray& bluetooth_mac_address);
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_BASE_BLUETOOTH_UTILS_H_