| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "device/bluetooth/bluetooth_utils.h" |
| |
| #include <vector> |
| |
| #include "base/basictypes.h" |
| #include "base/logging.h" |
| #include "base/strings/string_util.h" |
| |
| namespace { |
| static const char* kCommonUuidPostfix = "-0000-1000-8000-00805f9b34fb"; |
| static const char* kCommonUuidPrefix = "0000"; |
| static const int kUuidSize = 36; |
| } // namespace |
| |
| namespace device { |
| namespace bluetooth_utils { |
| |
| std::string CanonicalUuid(std::string uuid) { |
| if (uuid.empty()) |
| return std::string(); |
| |
| if (uuid.size() < 11 && uuid.find("0x") == 0) |
| uuid = uuid.substr(2); |
| |
| if (!(uuid.size() == 4 || uuid.size() == 8 || uuid.size() == 36)) |
| return std::string(); |
| |
| if (uuid.size() == 4 || uuid.size() == 8) { |
| for (size_t i = 0; i < uuid.size(); ++i) { |
| if (!IsHexDigit(uuid[i])) |
| return std::string(); |
| } |
| |
| if (uuid.size() == 4) |
| return kCommonUuidPrefix + uuid + kCommonUuidPostfix; |
| |
| return uuid + kCommonUuidPostfix; |
| } |
| |
| std::string uuid_result(uuid); |
| for (int i = 0; i < kUuidSize; ++i) { |
| if (i == 8 || i == 13 || i == 18 || i == 23) { |
| if (uuid[i] != '-') |
| return std::string(); |
| } else { |
| if (!IsHexDigit(uuid[i])) |
| return std::string(); |
| uuid_result[i] = tolower(uuid[i]); |
| } |
| } |
| return uuid_result; |
| } |
| |
| } // namespace bluetooth_utils |
| } // namespace device |