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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 device { | |
14 namespace bluetooth_utils { | |
15 | |
16 namespace { | |
17 | |
18 const char* kCommonUuidPostfix = "-0000-1000-8000-00805f9b34fb"; | |
19 const char* kCommonUuidPrefix = "0000"; | |
20 const int kUuidSize = 36; | |
21 | |
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. | |
29 canonical->clear(); | |
30 canonical_128->clear(); | |
31 *format = UUID::kFormatInvalid; | |
32 | |
33 if (uuid.empty()) | |
34 return; | |
35 | |
36 if (uuid.size() < 11 && uuid.find("0x") == 0) | |
37 uuid = uuid.substr(2); | |
38 | |
39 if (!(uuid.size() == 4 || uuid.size() == 8 || uuid.size() == 36)) | |
40 return; | |
41 | |
42 if (uuid.size() == 4 || uuid.size() == 8) { | |
43 for (size_t i = 0; i < uuid.size(); ++i) { | |
44 if (!IsHexDigit(uuid[i])) | |
45 return; | |
46 } | |
47 if (uuid.size() == 4) { | |
48 canonical->assign(uuid); | |
49 canonical_128->assign(kCommonUuidPrefix + uuid + kCommonUuidPostfix); | |
50 *format = UUID::kFormat16Bit; | |
51 return; | |
52 } | |
53 canonical->assign(uuid); | |
54 canonical_128->assign(uuid + kCommonUuidPostfix); | |
55 *format = UUID::kFormat32Bit; | |
56 return; | |
57 } | |
58 | |
59 for (int i = 0; i < kUuidSize; ++i) { | |
60 if (i == 8 || i == 13 || i == 18 || i == 23) { | |
61 if (uuid[i] != '-') | |
62 return; | |
63 } else { | |
64 if (!IsHexDigit(uuid[i])) | |
65 return; | |
66 uuid[i] = tolower(uuid[i]); | |
67 } | |
68 } | |
69 | |
70 canonical->assign(uuid); | |
71 canonical_128->assign(uuid); | |
72 *format = UUID::kFormat128Bit; | |
73 } | |
74 | |
75 } // namespace | |
76 | |
77 | |
78 UUID::UUID(const std::string& uuid) { | |
79 GetCanonicalUuid(uuid, &value_, &canonical_value_, &format_); | |
80 } | |
81 | |
82 UUID::~UUID() { | |
83 } | |
84 | |
85 bool UUID::IsValid() const { | |
86 return format_ != kFormatInvalid; | |
87 } | |
88 | |
89 bool UUID::operator<(const UUID& uuid) const { | |
90 return canonical_value_ < uuid.canonical_value_; | |
91 } | |
92 | |
93 bool UUID::operator==(const UUID& uuid) const { | |
94 return canonical_value_ == uuid.canonical_value_; | |
95 } | |
96 | |
97 bool UUID::operator!=(const UUID& uuid) const { | |
98 return canonical_value_ != uuid.canonical_value_; | |
99 } | |
100 | |
101 std::string CanonicalUuid(std::string uuid) { | |
102 std::string value; | |
103 std::string canonical_value; | |
104 UUID::Format format; | |
105 GetCanonicalUuid(uuid, &value, &canonical_value, &format); | |
106 return canonical_value; | |
107 } | |
108 | |
109 } // namespace bluetooth_utils | |
110 } // namespace device | |
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