// 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 "butil/guid.h" #include "butil/rand_util.h" #include "butil/strings/stringprintf.h" namespace butil { std::string GenerateGUID() { uint64_t sixteen_bytes[2] = { butil::RandUint64(), butil::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_t 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