// Copyright (c) 2020-2021, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#pragma once

#include <algorithm>
#include <stdexcept>

#include <gcrypt.h>

namespace openpgp
{

class s_expression
{
public:
  s_expression(const s_expression &) = delete;
  s_expression &operator=(const s_expression &) = delete;

  template <typename... Args>
  s_expression(Args... args)
  {
    if (gcry_sexp_build(&data, nullptr, args...) != GPG_ERR_NO_ERROR)
    {
      throw std::runtime_error("failed to build S-expression");
    }
  }

  s_expression(s_expression &&other)
  {
    std::swap(data, other.data);
  }

  s_expression(gcry_sexp_t data)
    : data(data)
  {
  }

  ~s_expression()
  {
    gcry_sexp_release(data);
  }

  const gcry_sexp_t &get() const
  {
    return data;
  }

private:
  gcry_sexp_t data = nullptr;
};

} // namespace openpgp
