| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/guid.h" |
| |
| #include "base/rand_util.h" |
| #include "base/stringprintf.h" |
| |
| namespace base { |
| |
| std::string GenerateGUID() { |
| uint64 sixteen_bytes[2] = { base::RandUint64(), base::RandUint64() }; |
| return RandomDataToGUIDString(sixteen_bytes); |
| } |
| |
| // TODO(cmasone): Once we're comfortable this works, migrate Windows code to |
| // use this as well. |
| std::string RandomDataToGUIDString(const uint64 bytes[2]) { |
| return StringPrintf("%08X-%04X-%04X-%04X-%012llX", |
| static_cast<unsigned int>(bytes[0] >> 32), |
| static_cast<unsigned int>((bytes[0] >> 16) & 0x0000ffff), |
| static_cast<unsigned int>(bytes[0] & 0x0000ffff), |
| static_cast<unsigned int>(bytes[1] >> 48), |
| bytes[1] & 0x0000ffffffffffffULL); |
| } |
| |
| } // namespace guid |
