15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/guid.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/rand_util.h" 85e3f23d412006dc4db4e659864679f29341e113fTorne (Richard Coles)#include "base/strings/stringprintf.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string GenerateGUID() { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint64 sixteen_bytes[2] = { base::RandUint64(), base::RandUint64() }; 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return RandomDataToGUIDString(sixteen_bytes); 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// TODO(cmasone): Once we're comfortable this works, migrate Windows code to 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// use this as well. 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)std::string RandomDataToGUIDString(const uint64 bytes[2]) { 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return StringPrintf("%08X-%04X-%04X-%04X-%012llX", 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<unsigned int>(bytes[0] >> 32), 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<unsigned int>((bytes[0] >> 16) & 0x0000ffff), 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<unsigned int>(bytes[0] & 0x0000ffff), 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static_cast<unsigned int>(bytes[1] >> 48), 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bytes[1] & 0x0000ffffffffffffULL); 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace guid 29