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1 // Copyright (c) 2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2008 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/rand_util.h" | 5 #include "base/rand_util.h" |
6 | 6 |
7 #include <stdlib.h> | 7 #include <stdlib.h> |
8 | 8 |
9 #include <objbase.h> | |
10 #include <windows.h> | |
11 | |
12 #include "base/basictypes.h" | 9 #include "base/basictypes.h" |
13 #include "base/logging.h" | 10 #include "base/logging.h" |
14 #include "base/string_util.h" | |
15 #include "base/utf_string_conversions.h" | |
16 | 11 |
17 namespace { | 12 namespace { |
18 | 13 |
19 uint32 RandUint32() { | 14 uint32 RandUint32() { |
20 uint32 number; | 15 uint32 number; |
21 CHECK_EQ(rand_s(&number), 0); | 16 CHECK_EQ(rand_s(&number), 0); |
22 return number; | 17 return number; |
23 } | 18 } |
24 | 19 |
25 } // namespace | 20 } // namespace |
26 | 21 |
27 namespace base { | 22 namespace base { |
28 | 23 |
29 uint64 RandUint64() { | 24 uint64 RandUint64() { |
30 uint32 first_half = RandUint32(); | 25 uint32 first_half = RandUint32(); |
31 uint32 second_half = RandUint32(); | 26 uint32 second_half = RandUint32(); |
32 return (static_cast<uint64>(first_half) << 32) + second_half; | 27 return (static_cast<uint64>(first_half) << 32) + second_half; |
33 } | 28 } |
34 | 29 |
35 std::string GenerateGUID() { | |
36 const int kGUIDSize = 39; | |
37 | |
38 GUID guid; | |
39 HRESULT guid_result = CoCreateGuid(&guid); | |
40 DCHECK(SUCCEEDED(guid_result)); | |
41 | |
42 std::wstring guid_string; | |
43 int result = StringFromGUID2(guid, | |
44 WriteInto(&guid_string, kGUIDSize), kGUIDSize); | |
45 DCHECK(result == kGUIDSize); | |
46 | |
47 return WideToUTF8(guid_string.substr(1, guid_string.length() - 2)); | |
48 } | |
49 | |
50 } // namespace base | 30 } // namespace base |
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