////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2014-2023, Lawrence Livermore National Security, LLC.
// Produced at the Lawrence Livermore National Laboratory.
// Written by the LBANN Research Team (B. Van Essen, et al.) listed in
// the CONTRIBUTORS file. <lbann-dev@llnl.gov>
//
// LLNL-CODE-697807.
// All rights reserved.
//
// This file is part of LBANN: Livermore Big Artificial Neural Network
// Toolkit. For details, see http://software.llnl.gov/LBANN or
// https://github.com/LLNL/LBANN.
//
// Licensed under the Apache License, Version 2.0 (the "Licensee"); you
// may not use this file except in compliance with the License.  You may
// obtain a copy of the License at:
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the license.
////////////////////////////////////////////////////////////////////////////////

#include "lbann/utils/typename.hpp"

#include "lbann/utils/exception.hpp"
#include "lbann/utils/memory.hpp"

#if __has_include(<cxxabi.h>)
#include <cxxabi.h>
#define LBANN_HAS_CXXABI_H_INCLUDE

std::string demangle(char const* str)
{
  // RAII hack to manage the memory returned by __cxa_demangle.
  using c_str_ptr = std::unique_ptr<char, void (*)(void*)>;

  int status;
  c_str_ptr demangled_name{abi::__cxa_demangle(str, nullptr, nullptr, &status),
                           free};
  if (status) {
    LBANN_ERROR("__cxa_demangle reports nonzero status: ", status);
  }

  return demangled_name.get();
}
#else
#undef LBANN_HAS_CXXABI_H_INCLUDE
#endif

namespace lbann {

namespace details {

std::string get_type_name(const std::type_info& info)
{
#ifdef LBANN_HAS_CXXABI_H_INCLUDE
  return demangle(info.name());
#else
  return info.name();
#endif
}

} // namespace details

} // namespace lbann
