/*
  Copyright (c) 2014-2015 DataStax

  Licensed under the Apache License, Version 2.0 (the "License");
  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.
*/

// Based on the ring buffer implementation in
// NodeBIO (https://github.com/joyent/node/blob/master/src/node_crypto_bio.h).
// The following is the license for that implementation:

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef __CASS_RING_BUFFER_BIO_HPP_INCLUDED__
#define __CASS_RING_BUFFER_BIO_HPP_INCLUDED__

#include "ring_buffer.hpp"

#include <assert.h>
#include <openssl/bio.h>

namespace cass {
namespace rb {

class RingBufferBio {
public:
  static BIO* create(RingBuffer* ring_buffer);

  static RingBuffer* from_bio(BIO* bio) {
    assert(bio->ptr != NULL);
    return static_cast<RingBuffer*>(bio->ptr);
  }

private:
  static int create(BIO* bio);
  static int destroy(BIO* bio);
  static int read(BIO* bio, char* out, int len);
  static int write(BIO* bio, const char* data, int len);
  static int puts(BIO* bio, const char* str);
  static int gets(BIO* bio, char* out, int size);
  static long ctrl(BIO* bio, int cmd, long num, void* ptr);

  static const BIO_METHOD method;
};

} // namespace rb
} // namespace cass

#endif