text: /*
   * 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.)
   * 
   * See http://www.boost.org/libs/iostreams for documentation.
  
   * File:        boost/iostreams/detail/execute.hpp
   * Date:        Thu Dec 06 13:21:54 MST 2007
   * Copyright:   2007-2008 CodeRage, LLC
   * Author:      Jonathan Turkanis
   * Contact:     turkanis at coderage dot com
   *
   * Defines the function boost::iostreams::detail::current_directory, used by 
   * boost::iostreams::detail::absolute_path.
   */
  
  #ifndef BOOST_IOSTREAMS_DETAIL_CURRENT_DIRECTORY_HPP_INCLUDED
  #define BOOST_IOSTREAMS_DETAIL_CURRENT_DIRECTORY_HPP_INCLUDED
  
  #include <boost/config.hpp>  // make sure size_t is in std.
  #include <cstddef>           // size_t
  #include <string>
  #include <boost/iostreams/detail/buffer.hpp>
  #include <boost/iostreams/detail/config/windows_posix.hpp>
  #include <boost/iostreams/detail/system_failure.hpp>
  #ifdef BOOST_IOSTREAMS_WINDOWS
  # define WIN32_LEAN_AND_MEAN  // Exclude rarely-used stuff from Windows headers
  # include <windows.h>
  #else
  # include <unistd.h>        // sysconf.
  #endif
  
  namespace boost { namespace iostreams { namespace detail {
  
  // Returns the current working directory
  inline std::string current_directory()
  {
  #ifdef BOOST_IOSTREAMS_WINDOWS
      DWORD               length;
      basic_buffer<char>  buf(MAX_PATH);
      while (true) {
          length = ::GetCurrentDirectoryA(buf.size(), buf.data());
          if (!length)
              throw_system_failure("failed determining current directory");
          if (length < static_cast<DWORD>(buf.size()))
              break;
          buf.resize(buf.size() * 2);
      }
      return std::string(buf.data(), length);
  #else // #ifdef BOOST_IOSTREAMS_WINDOWS
      basic_buffer<char> buf(pathconf(".", _PC_PATH_MAX));
      if (!getcwd(buf.data(), static_cast<size_t>(buf.size())))
          throw_system_failure("failed determining current directory");
      return std::string(buf.data());
  #endif // #ifdef BOOST_IOSTREAMS_WINDOWS
  }
  
  } } } // End namespaces detail, iostreams, boost.
  
  #endif // #ifndef BOOST_IOSTREAMS_DETAIL_CURRENT_DIRECTORY_HPP_INCLUDED
  