marja@chromium.org | 9158ee0 | 2012-06-14 23:22:07 +0900 | [diff] [blame] | 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 "base/guid.h" |
| 6 | |
| 7 | #include "base/rand_util.h" |
avi@chromium.org | 94bd573 | 2013-06-11 22:36:37 +0900 | [diff] [blame] | 8 | #include "base/strings/stringprintf.h" |
marja@chromium.org | 9158ee0 | 2012-06-14 23:22:07 +0900 | [diff] [blame] | 9 | |
| 10 | namespace base { |
| 11 | |
| 12 | std::string GenerateGUID() { |
| 13 | uint64 sixteen_bytes[2] = { base::RandUint64(), base::RandUint64() }; |
| 14 | return RandomDataToGUIDString(sixteen_bytes); |
| 15 | } |
| 16 | |
| 17 | // TODO(cmasone): Once we're comfortable this works, migrate Windows code to |
| 18 | // use this as well. |
| 19 | std::string RandomDataToGUIDString(const uint64 bytes[2]) { |
| 20 | return StringPrintf("%08X-%04X-%04X-%04X-%012llX", |
| 21 | static_cast<unsigned int>(bytes[0] >> 32), |
| 22 | static_cast<unsigned int>((bytes[0] >> 16) & 0x0000ffff), |
| 23 | static_cast<unsigned int>(bytes[0] & 0x0000ffff), |
| 24 | static_cast<unsigned int>(bytes[1] >> 48), |
| 25 | bytes[1] & 0x0000ffffffffffffULL); |
| 26 | } |
| 27 | |
| 28 | } // namespace guid |