1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "device/bluetooth/bluetooth_utils.h" 6 7 #include <vector> 8 9 #include "base/basictypes.h" 10 #include "base/logging.h" 11 #include "base/strings/string_util.h" 12 13 namespace { 14 static const char* kCommonUuidPostfix = "-0000-1000-8000-00805f9b34fb"; 15 static const char* kCommonUuidPrefix = "0000"; 16 static const int kUuidSize = 36; 17 } // namespace 18 19 namespace device { 20 namespace bluetooth_utils { 21 22 std::string CanonicalUuid(std::string uuid) { 23 if (uuid.empty()) 24 return std::string(); 25 26 if (uuid.size() < 11 && uuid.find("0x") == 0) 27 uuid = uuid.substr(2); 28 29 if (!(uuid.size() == 4 || uuid.size() == 8 || uuid.size() == 36)) 30 return std::string(); 31 32 if (uuid.size() == 4 || uuid.size() == 8) { 33 for (size_t i = 0; i < uuid.size(); ++i) { 34 if (!IsHexDigit(uuid[i])) 35 return std::string(); 36 } 37 38 if (uuid.size() == 4) 39 return kCommonUuidPrefix + uuid + kCommonUuidPostfix; 40 41 return uuid + kCommonUuidPostfix; 42 } 43 44 std::string uuid_result(uuid); 45 for (int i = 0; i < kUuidSize; ++i) { 46 if (i == 8 || i == 13 || i == 18 || i == 23) { 47 if (uuid[i] != '-') 48 return std::string(); 49 } else { 50 if (!IsHexDigit(uuid[i])) 51 return std::string(); 52 uuid_result[i] = tolower(uuid[i]); 53 } 54 } 55 return uuid_result; 56 } 57 58 } // namespace bluetooth_utils 59 } // namespace device 60
