1 /* 2 * Distributed under the Boost Software License, Version 1.0.(See accompanying 3 * file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.) 4 * 5 * See http://www.boost.org/libs/iostreams for documentation. 6 7 * File: boost/iostreams/detail/execute.hpp 8 * Date: Thu Dec 06 13:21:54 MST 2007 9 * Copyright: 2007-2008 CodeRage, LLC 10 * Author: Jonathan Turkanis 11 * Contact: turkanis at coderage dot com 12 * 13 * Defines the function boost::iostreams::detail::current_directory, used by 14 * boost::iostreams::detail::absolute_path. 15 */ 16 17 #ifndef BOOST_IOSTREAMS_DETAIL_CURRENT_DIRECTORY_HPP_INCLUDED 18 #define BOOST_IOSTREAMS_DETAIL_CURRENT_DIRECTORY_HPP_INCLUDED 19 20 #include <boost/config.hpp> // make sure size_t is in std. 21 #include <cstddef> // size_t 22 #include <string> 23 #include <boost/iostreams/detail/buffer.hpp> 24 #include <boost/iostreams/detail/config/windows_posix.hpp> 25 #include <boost/iostreams/detail/system_failure.hpp> 26 #ifdef BOOST_IOSTREAMS_WINDOWS 27 # define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers 28 # include <windows.h> 29 #else 30 # include <unistd.h> // sysconf. 31 #endif 32 33 // Must come last. 34 #include <boost/iostreams/detail/config/disable_warnings.hpp> 35 36 namespace boost { namespace iostreams { namespace detail { 37 38 // Returns the current working directory current_directory()39inline std::string current_directory() 40 { 41 #ifdef BOOST_IOSTREAMS_WINDOWS 42 DWORD length; 43 basic_buffer<char> buf(MAX_PATH); 44 while (true) { 45 length = ::GetCurrentDirectoryA(buf.size(), buf.data()); 46 if (!length) 47 throw_system_failure("failed determining current directory"); 48 if (length < static_cast<DWORD>(buf.size())) 49 break; 50 buf.resize(buf.size() * 2); 51 } 52 return std::string(buf.data(), length); 53 #else // #ifdef BOOST_IOSTREAMS_WINDOWS 54 basic_buffer<char> buf(pathconf(".", _PC_PATH_MAX)); 55 if (!getcwd(buf.data(), static_cast<size_t>(buf.size()))) 56 throw_system_failure("failed determining current directory"); 57 return std::string(buf.data()); 58 #endif // #ifdef BOOST_IOSTREAMS_WINDOWS 59 } 60 61 } } } // End namespaces detail, iostreams, boost. 62 63 #include <boost/iostreams/detail/config/enable_warnings.hpp> 64 65 #endif // #ifndef BOOST_IOSTREAMS_DETAIL_CURRENT_DIRECTORY_HPP_INCLUDED 66