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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.

 #ifndef BASE_GUID_H_

 #define BASE_GUID_H_

 #include <string>

 #include "base/base_export.h"

 #include "base/basictypes.h"

 #include "build/build_config.h"

 namespace base {

 // Generate a 128-bit random GUID of the form: "%08X-%04X-%04X-%04X-%012llX".

 // If GUID generation fails an empty string is returned.

 // The POSIX implementation uses psuedo random number generation to create

 // the GUID.  The Windows implementation uses system services.

 BASE_EXPORT std::string GenerateGUID();

 // Returns true if the input string conforms to the GUID format.

 BASE_EXPORT bool IsValidGUID(const std::string& guid);

 #if defined(OS_POSIX)

 // For unit testing purposes only.  Do not use outside of tests.

 BASE_EXPORT std::string RandomDataToGUIDString(const uint64 bytes[2]);

 #endif

 }  // namespace guid

 #endif  // BASE_GUID_H_