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.
5 #include "device/bluetooth/bluetooth_utils.h"
9 #include "base/basictypes.h"
10 #include "base/logging.h"
11 #include "base/strings/string_util.h"
14 namespace bluetooth_utils {
18 const char* kCommonUuidPostfix = "-0000-1000-8000-00805f9b34fb";
19 const char* kCommonUuidPrefix = "0000";
20 const int kUuidSize = 36;
22 // Returns the canonical, 128-bit canonical, and the format of the UUID
23 // in |canonical|, |canonical_128|, and |format| based on |uuid|.
24 void GetCanonicalUuid(std::string uuid,
25 std::string* canonical,
26 std::string* canonical_128,
27 UUID::Format* format) {
28 // Initialize the values for the failure case.
30 canonical_128->clear();
31 *format = UUID::kFormatInvalid;
36 if (uuid.size() < 11 && uuid.find("0x") == 0)
37 uuid = uuid.substr(2);
39 if (!(uuid.size() == 4 || uuid.size() == 8 || uuid.size() == 36))
42 if (uuid.size() == 4 || uuid.size() == 8) {
43 for (size_t i = 0; i < uuid.size(); ++i) {
44 if (!IsHexDigit(uuid[i]))
47 if (uuid.size() == 4) {
48 canonical->assign(uuid);
49 canonical_128->assign(kCommonUuidPrefix + uuid + kCommonUuidPostfix);
50 *format = UUID::kFormat16Bit;
53 canonical->assign(uuid);
54 canonical_128->assign(uuid + kCommonUuidPostfix);
55 *format = UUID::kFormat32Bit;
59 for (int i = 0; i < kUuidSize; ++i) {
60 if (i == 8 || i == 13 || i == 18 || i == 23) {
64 if (!IsHexDigit(uuid[i]))
66 uuid[i] = tolower(uuid[i]);
70 canonical->assign(uuid);
71 canonical_128->assign(uuid);
72 *format = UUID::kFormat128Bit;
78 UUID::UUID(const std::string& uuid) {
79 GetCanonicalUuid(uuid, &value_, &canonical_value_, &format_);
82 UUID::UUID() : format_(kFormatInvalid) {
88 bool UUID::IsValid() const {
89 return format_ != kFormatInvalid;
92 bool UUID::operator<(const UUID& uuid) const {
93 return canonical_value_ < uuid.canonical_value_;
96 bool UUID::operator==(const UUID& uuid) const {
97 return canonical_value_ == uuid.canonical_value_;
100 bool UUID::operator!=(const UUID& uuid) const {
101 return canonical_value_ != uuid.canonical_value_;
104 std::string CanonicalUuid(std::string uuid) {
106 std::string canonical_value;
108 GetCanonicalUuid(uuid, &value, &canonical_value, &format);
109 return canonical_value;
112 } // namespace bluetooth_utils
113 } // namespace device