1731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick// Copyright (c) 2008 The Chromium Authors. All rights reserved. 2731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick// Use of this source code is governed by a BSD-style license that can be 3731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick// found in the LICENSE file. 4731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick 521d179b334e59e9a3bfcaed4c4430bef1bc5759dKristian Monsen#include "chrome/common/guid.h" 6731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick 7731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick#include "base/rand_util.h" 8731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick#include "base/stringprintf.h" 9731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick 10731df977c0511bca2206b5f333555b1205ff1f43Iain Merricknamespace guid { 11731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick 12731df977c0511bca2206b5f333555b1205ff1f43Iain Merrickstd::string GenerateGUID() { 13731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick uint64 sixteen_bytes[2] = { base::RandUint64(), base::RandUint64() }; 14731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick return RandomDataToGUIDString(sixteen_bytes); 15731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick} 16731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick 17731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick// TODO(cmasone): Once we're comfortable this works, migrate Windows code to 18731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick// use this as well. 19731df977c0511bca2206b5f333555b1205ff1f43Iain Merrickstd::string RandomDataToGUIDString(const uint64 bytes[2]) { 20731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick return StringPrintf("%08X-%04X-%04X-%04X-%012llX", 21731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick static_cast<unsigned int>(bytes[0] >> 32), 22731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick static_cast<unsigned int>((bytes[0] >> 16) & 0x0000ffff), 23731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick static_cast<unsigned int>(bytes[0] & 0x0000ffff), 24731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick static_cast<unsigned int>(bytes[1] >> 48), 25731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick bytes[1] & 0x0000ffffffffffffULL); 26731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick} 27731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick 28731df977c0511bca2206b5f333555b1205ff1f43Iain Merrick} // namespace guid 29