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 3// found in the LICENSE file. 4 5#include "chrome/common/guid.h" 6 7#include "base/rand_util.h" 8#include "base/stringprintf.h" 9 10namespace guid { 11 12std::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. 19std::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