text: /*
   * Copyright 2014-2020 Real Logic Limited.
   *
   * 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
   *
   * https://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.
   */
  #ifndef AERON_COMMON_FLYWEIGHT_H
  #define AERON_COMMON_FLYWEIGHT_H
  
  #include <string>
  #include <concurrent/AtomicBuffer.h>
  
  namespace aeron { namespace command {
  
  template<typename struct_t>
  class Flyweight
  {
  public:
      Flyweight (concurrent::AtomicBuffer& buffer, util::index_t offset) :
          m_struct(buffer.overlayStruct<struct_t>(offset)),
          m_buffer(buffer),
          m_baseOffset(offset)
      {
      }
  
  protected:
      struct_t& m_struct;
  
      inline std::string stringGet(util::index_t offset) const
      {
          return m_buffer.getString(m_baseOffset + offset);
      }
  
      inline util::index_t stringGetLength(util::index_t offset) const
      {
          return m_buffer.getStringLength(m_baseOffset + offset);
      }
  
      inline util::index_t stringPut(util::index_t offset, const std::string& s)
      {
          return m_buffer.putString(m_baseOffset + offset, s);
      }
  
      inline util::index_t stringPutWithoutLength(util::index_t offset, const std::string& s)
      {
          return m_buffer.putStringWithoutLength(m_baseOffset + offset, s);
      }
  
      inline std::string stringGetWithoutLength(util::index_t offset, std::int32_t size) const
      {
          return m_buffer.getStringWithoutLength(m_baseOffset + offset, size);
      }
  
      inline std::int32_t getInt32(util::index_t offset) const
      {
          return m_buffer.getInt32(m_baseOffset + offset);
      }
  
      inline void putInt32(util::index_t offset, std::int32_t value)
      {
          m_buffer.putInt32(m_baseOffset + offset, value);
      }
  
      inline const uint8_t *bytesAt(util::index_t offset) const
      {
          return m_buffer.buffer() + m_baseOffset + offset;
      }
  
      inline void putBytes(util::index_t offset, const uint8_t *src, util::index_t length)
      {
          m_buffer.putBytes(m_baseOffset + offset, src, length);
      }
  
      inline void getBytes(util::index_t offset, uint8_t *dest, util::index_t length) const
      {
          m_buffer.getBytes(m_baseOffset + offset, dest, length);
      }
  
      template <typename struct_t2>
      inline struct_t2& overlayStruct (util::index_t offset)
      {
          return m_buffer.overlayStruct<struct_t2>(m_baseOffset + offset);
      }
  
      template <typename struct_t2>
      inline const struct_t2& overlayStruct (util::index_t offset) const
      {
          return m_buffer.overlayStruct<struct_t2>(m_baseOffset + offset);
      }
  
  private:
      concurrent::AtomicBuffer m_buffer;
      util::index_t m_baseOffset;
  };
  
  }}
  
  #endif
  