.. _program_listing_file_BackendAsyncmsg_SendMessageUnbufferedCopy.cpp:

Program Listing for File SendMessageUnbufferedCopy.cpp
======================================================

|exhale_lsh| :ref:`Return to documentation for file <file_BackendAsyncmsg_SendMessageUnbufferedCopy.cpp>` (``BackendAsyncmsg/SendMessageUnbufferedCopy.cpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #include "SendMessageUnbufferedCopy.hpp"
   
   #include <numeric>
   
   netio3::asyncmsg::SendMessageUnbufferedCopy::SendMessageUnbufferedCopy(
     const std::span<const std::uint8_t> data,
     const std::span<const std::uint8_t> header_data,
     const std::uint64_t key) :
     m_data{std::vector<std::uint8_t>(data.begin(), data.end())},
     m_header_data{header_data.begin(), header_data.end()},
     m_key{key}
   {}
   
   netio3::asyncmsg::SendMessageUnbufferedCopy::SendMessageUnbufferedCopy(
     const std::span<const iovec> data,
     const std::span<const std::uint8_t> header_data,
     const std::uint64_t key) :
     m_data{[data]() {
       size_t total_size =
         std::accumulate(data.begin(), data.end(), 0ULL, [](size_t sum, const iovec& entry) {
           return sum + entry.iov_len;
         });
   
       std::vector<std::uint8_t> result;
       result.reserve(total_size);
   
       for (const auto& entry : data) {
         const auto* src = static_cast<const std::uint8_t*>(entry.iov_base);
         result.insert(result.end(), src, src + entry.iov_len);
       }
       return result;
     }()},
     m_header_data{header_data.begin(), header_data.end()},
     m_key{key}
   {}
   
   void netio3::asyncmsg::SendMessageUnbufferedCopy::toBuffers(
     std::vector<boost::asio::const_buffer>& buffers) const
   {
     const boost::asio::const_buffer headerDataBuffer(m_header_data.data(), std::size(m_header_data));
     buffers.push_back(headerDataBuffer);
     buffers.push_back(boost::asio::const_buffer(m_data.data(), std::size(m_data)));
   }