Added boost header

test/external/boost/asio/detail/buffer_sequence_adapter.hpp

@@ -0,0 +1,363 @@
+//
+// detail/buffer_sequence_adapter.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2011 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_ASIO_DETAIL_BUFFER_SEQUENCE_ADAPTER_HPP
+#define BOOST_ASIO_DETAIL_BUFFER_SEQUENCE_ADAPTER_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+#include <boost/asio/buffer.hpp>
+#include <boost/asio/detail/array_fwd.hpp>
+#include <boost/asio/detail/socket_types.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+class buffer_sequence_adapter_base
+{
+protected:
+#if defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+  typedef WSABUF native_buffer_type;
+
+  static void init_native_buffer(WSABUF& buf,
+      const boost::asio::mutable_buffer& buffer)
+  {
+    buf.buf = boost::asio::buffer_cast<char*>(buffer);
+    buf.len = static_cast<ULONG>(boost::asio::buffer_size(buffer));
+  }
+
+  static void init_native_buffer(WSABUF& buf,
+      const boost::asio::const_buffer& buffer)
+  {
+    buf.buf = const_cast<char*>(boost::asio::buffer_cast<const char*>(buffer));
+    buf.len = static_cast<ULONG>(boost::asio::buffer_size(buffer));
+  }
+#else // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+  typedef iovec native_buffer_type;
+
+  static void init_iov_base(void*& base, void* addr)
+  {
+    base = addr;
+  }
+
+  template <typename T>
+  static void init_iov_base(T& base, void* addr)
+  {
+    base = static_cast<T>(addr);
+  }
+
+  static void init_native_buffer(iovec& iov,
+      const boost::asio::mutable_buffer& buffer)
+  {
+    init_iov_base(iov.iov_base, boost::asio::buffer_cast<void*>(buffer));
+    iov.iov_len = boost::asio::buffer_size(buffer);
+  }
+
+  static void init_native_buffer(iovec& iov,
+      const boost::asio::const_buffer& buffer)
+  {
+    init_iov_base(iov.iov_base, const_cast<void*>(
+          boost::asio::buffer_cast<const void*>(buffer)));
+    iov.iov_len = boost::asio::buffer_size(buffer);
+  }
+#endif // defined(BOOST_WINDOWS) || defined(__CYGWIN__)
+};
+
+// Helper class to translate buffers into the native buffer representation.
+template <typename Buffer, typename Buffers>
+class buffer_sequence_adapter
+  : buffer_sequence_adapter_base
+{
+public:
+  explicit buffer_sequence_adapter(const Buffers& buffer_sequence)
+    : count_(0), total_buffer_size_(0)
+  {
+    typename Buffers::const_iterator iter = buffer_sequence.begin();
+    typename Buffers::const_iterator end = buffer_sequence.end();
+    for (; iter != end && count_ < max_buffers; ++iter, ++count_)
+    {
+      Buffer buffer(*iter);
+      init_native_buffer(buffers_[count_], buffer);
+      total_buffer_size_ += boost::asio::buffer_size(buffer);
+    }
+  }
+
+  native_buffer_type* buffers()
+  {
+    return buffers_;
+  }
+
+  std::size_t count() const
+  {
+    return count_;
+  }
+
+  bool all_empty() const
+  {
+    return total_buffer_size_ == 0;
+  }
+
+  static bool all_empty(const Buffers& buffer_sequence)
+  {
+    typename Buffers::const_iterator iter = buffer_sequence.begin();
+    typename Buffers::const_iterator end = buffer_sequence.end();
+    std::size_t i = 0;
+    for (; iter != end && i < max_buffers; ++iter, ++i)
+      if (boost::asio::buffer_size(Buffer(*iter)) > 0)
+        return false;
+    return true;
+  }
+
+  static void validate(const Buffers& buffer_sequence)
+  {
+    typename Buffers::const_iterator iter = buffer_sequence.begin();
+    typename Buffers::const_iterator end = buffer_sequence.end();
+    for (; iter != end; ++iter)
+    {
+      Buffer buffer(*iter);
+      boost::asio::buffer_cast<const void*>(buffer);
+    }
+  }
+
+  static Buffer first(const Buffers& buffer_sequence)
+  {
+    typename Buffers::const_iterator iter = buffer_sequence.begin();
+    typename Buffers::const_iterator end = buffer_sequence.end();
+    for (; iter != end; ++iter)
+    {
+      Buffer buffer(*iter);
+      if (boost::asio::buffer_size(buffer) != 0)
+        return buffer;
+    }
+    return Buffer();
+  }
+
+private:
+  // The maximum number of buffers to support in a single operation.
+  enum { max_buffers = 64 < max_iov_len ? 64 : max_iov_len };
+
+  native_buffer_type buffers_[max_buffers];
+  std::size_t count_;
+  std::size_t total_buffer_size_;
+};
+
+template <typename Buffer>
+class buffer_sequence_adapter<Buffer, boost::asio::mutable_buffers_1>
+  : buffer_sequence_adapter_base
+{
+public:
+  explicit buffer_sequence_adapter(
+      const boost::asio::mutable_buffers_1& buffer_sequence)
+  {
+    init_native_buffer(buffer_, Buffer(buffer_sequence));
+    total_buffer_size_ = boost::asio::buffer_size(buffer_sequence);
+  }
+
+  native_buffer_type* buffers()
+  {
+    return &buffer_;
+  }
+
+  std::size_t count() const
+  {
+    return 1;
+  }
+
+  bool all_empty() const
+  {
+    return total_buffer_size_ == 0;
+  }
+
+  static bool all_empty(const boost::asio::mutable_buffers_1& buffer_sequence)
+  {
+    return boost::asio::buffer_size(buffer_sequence) == 0;
+  }
+
+  static void validate(const boost::asio::mutable_buffers_1& buffer_sequence)
+  {
+    boost::asio::buffer_cast<const void*>(buffer_sequence);
+  }
+
+  static Buffer first(const boost::asio::mutable_buffers_1& buffer_sequence)
+  {
+    return Buffer(buffer_sequence);
+  }
+
+private:
+  native_buffer_type buffer_;
+  std::size_t total_buffer_size_;
+};
+
+template <typename Buffer>
+class buffer_sequence_adapter<Buffer, boost::asio::const_buffers_1>
+  : buffer_sequence_adapter_base
+{
+public:
+  explicit buffer_sequence_adapter(
+      const boost::asio::const_buffers_1& buffer_sequence)
+  {
+    init_native_buffer(buffer_, Buffer(buffer_sequence));
+    total_buffer_size_ = boost::asio::buffer_size(buffer_sequence);
+  }
+
+  native_buffer_type* buffers()
+  {
+    return &buffer_;
+  }
+
+  std::size_t count() const
+  {
+    return 1;
+  }
+
+  bool all_empty() const
+  {
+    return total_buffer_size_ == 0;
+  }
+
+  static bool all_empty(const boost::asio::const_buffers_1& buffer_sequence)
+  {
+    return boost::asio::buffer_size(buffer_sequence) == 0;
+  }
+
+  static void validate(const boost::asio::const_buffers_1& buffer_sequence)
+  {
+    boost::asio::buffer_cast<const void*>(buffer_sequence);
+  }
+
+  static Buffer first(const boost::asio::const_buffers_1& buffer_sequence)
+  {
+    return Buffer(buffer_sequence);
+  }
+
+private:
+  native_buffer_type buffer_;
+  std::size_t total_buffer_size_;
+};
+
+template <typename Buffer, typename Elem>
+class buffer_sequence_adapter<Buffer, boost::array<Elem, 2> >
+  : buffer_sequence_adapter_base
+{
+public:
+  explicit buffer_sequence_adapter(
+      const boost::array<Elem, 2>& buffer_sequence)
+  {
+    init_native_buffer(buffers_[0], Buffer(buffer_sequence[0]));
+    init_native_buffer(buffers_[1], Buffer(buffer_sequence[1]));
+    total_buffer_size_ = boost::asio::buffer_size(buffer_sequence[0])
+      + boost::asio::buffer_size(buffer_sequence[1]);
+  }
+
+  native_buffer_type* buffers()
+  {
+    return buffers_;
+  }
+
+  std::size_t count() const
+  {
+    return 2;
+  }
+
+  bool all_empty() const
+  {
+    return total_buffer_size_ == 0;
+  }
+
+  static bool all_empty(const boost::array<Elem, 2>& buffer_sequence)
+  {
+    return boost::asio::buffer_size(buffer_sequence[0]) == 0
+      && boost::asio::buffer_size(buffer_sequence[1]) == 0;
+  }
+
+  static void validate(const boost::array<Elem, 2>& buffer_sequence)
+  {
+    boost::asio::buffer_cast<const void*>(buffer_sequence[0]);
+    boost::asio::buffer_cast<const void*>(buffer_sequence[1]);
+  }
+
+  static Buffer first(const boost::array<Elem, 2>& buffer_sequence)
+  {
+    return Buffer(buffer_sequence[0]);
+  }
+
+private:
+  native_buffer_type buffers_[2];
+  std::size_t total_buffer_size_;
+};
+
+#if defined(BOOST_ASIO_HAS_STD_ARRAY)
+
+template <typename Buffer, typename Elem>
+class buffer_sequence_adapter<Buffer, std::array<Elem, 2> >
+  : buffer_sequence_adapter_base
+{
+public:
+  explicit buffer_sequence_adapter(
+      const std::array<Elem, 2>& buffer_sequence)
+  {
+    init_native_buffer(buffers_[0], Buffer(buffer_sequence[0]));
+    init_native_buffer(buffers_[1], Buffer(buffer_sequence[1]));
+    total_buffer_size_ = boost::asio::buffer_size(buffer_sequence[0])
+      + boost::asio::buffer_size(buffer_sequence[1]);
+  }
+
+  native_buffer_type* buffers()
+  {
+    return buffers_;
+  }
+
+  std::size_t count() const
+  {
+    return 2;
+  }
+
+  bool all_empty() const
+  {
+    return total_buffer_size_ == 0;
+  }
+
+  static bool all_empty(const std::array<Elem, 2>& buffer_sequence)
+  {
+    return boost::asio::buffer_size(buffer_sequence[0]) == 0
+      && boost::asio::buffer_size(buffer_sequence[1]) == 0;
+  }
+
+  static void validate(const std::array<Elem, 2>& buffer_sequence)
+  {
+    boost::asio::buffer_cast<const void*>(buffer_sequence[0]);
+    boost::asio::buffer_cast<const void*>(buffer_sequence[1]);
+  }
+
+  static Buffer first(const std::array<Elem, 2>& buffer_sequence)
+  {
+    return Buffer(buffer_sequence[0]);
+  }
+
+private:
+  native_buffer_type buffers_[2];
+  std::size_t total_buffer_size_;
+};
+
+#endif // defined(BOOST_ASIO_HAS_STD_ARRAY)
+
+} // namespace detail
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_BUFFER_SEQUENCE_ADAPTER_HPP