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// 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 "base/guid.h"
#include <stdlib.h>
#include <objbase.h>
#include <windows.h>
#include "base/logging.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
namespace base {
std::string GenerateGUID() {
const int kGUIDSize = 39;
GUID guid;
HRESULT guid_result = CoCreateGuid(&guid);
DCHECK(SUCCEEDED(guid_result));
if (!SUCCEEDED(guid_result))
return std::string();
std::wstring guid_string;
int result = StringFromGUID2(guid,
WriteInto(&guid_string, kGUIDSize), kGUIDSize);
DCHECK(result == kGUIDSize);
if (result != kGUIDSize)
return std::string();
return WideToUTF8(guid_string.substr(1, guid_string.length() - 2));
}
} // namespace base
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