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" 8 #include "base/strings/stringprintf.h" 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 29
