diff --git a/include/ndnboost/filesystem/config.hpp b/include/ndnboost/filesystem/config.hpp
new file mode 100644
index 0000000..f70bec2
--- /dev/null
+++ b/include/ndnboost/filesystem/config.hpp
@@ -0,0 +1,109 @@
+//  ndnboost/filesystem/v3/config.hpp  ----------------------------------------------------//
+
+//  Copyright Beman Dawes 2003
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//  Library home page: http://www.boost.org/libs/filesystem
+
+//--------------------------------------------------------------------------------------// 
+
+#ifndef NDNBOOST_FILESYSTEM3_CONFIG_HPP
+#define NDNBOOST_FILESYSTEM3_CONFIG_HPP
+
+# if defined(NDNBOOST_FILESYSTEM_VERSION) && NDNBOOST_FILESYSTEM_VERSION != 3
+#   error Compiling Filesystem version 3 file with NDNBOOST_FILESYSTEM_VERSION defined != 3
+# endif
+
+# if !defined(NDNBOOST_FILESYSTEM_VERSION)
+#   define NDNBOOST_FILESYSTEM_VERSION 3
+# endif
+
+#define NDNBOOST_FILESYSTEM_I18N  // aid users wishing to compile several versions
+
+// This header implements separate compilation features as described in
+// http://www.boost.org/more/separate_compilation.html
+
+#include <ndnboost/config.hpp>
+#include <ndnboost/system/api_config.hpp>  // for NDNBOOST_POSIX_API or NDNBOOST_WINDOWS_API
+#include <ndnboost/detail/workaround.hpp> 
+
+//  NDNBOOST_FILESYSTEM_DEPRECATED needed for source compiles -----------------------------//
+
+# ifdef NDNBOOST_FILESYSTEM_SOURCE
+#   define NDNBOOST_FILESYSTEM_DEPRECATED
+# endif
+
+//  throw an exception  ----------------------------------------------------------------//
+//
+//  Exceptions were originally thrown via ndnboost::throw_exception().
+//  As throw_exception() became more complex, it caused user error reporting
+//  to be harder to interpret, since the exception reported became much more complex.
+//  The immediate fix was to throw directly, wrapped in a macro to make any later change
+//  easier.
+
+#define NDNBOOST_FILESYSTEM_THROW(EX) throw EX
+
+# if defined( NDNBOOST_NO_STD_WSTRING )
+#   error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
+# endif
+
+//  This header implements separate compilation features as described in
+//  http://www.boost.org/more/separate_compilation.html
+
+//  normalize macros  ------------------------------------------------------------------//
+
+#if !defined(NDNBOOST_FILESYSTEM_DYN_LINK) && !defined(NDNBOOST_FILESYSTEM_STATIC_LINK) \
+  && !defined(NDNBOOST_ALL_DYN_LINK) && !defined(NDNBOOST_ALL_STATIC_LINK)
+# define NDNBOOST_FILESYSTEM_STATIC_LINK
+#endif
+
+#if defined(NDNBOOST_ALL_DYN_LINK) && !defined(NDNBOOST_FILESYSTEM_DYN_LINK)
+# define NDNBOOST_FILESYSTEM_DYN_LINK 
+#elif defined(NDNBOOST_ALL_STATIC_LINK) && !defined(NDNBOOST_FILESYSTEM_STATIC_LINK)
+# define NDNBOOST_FILESYSTEM_STATIC_LINK 
+#endif
+
+#if defined(NDNBOOST_FILESYSTEM_DYN_LINK) && defined(NDNBOOST_FILESYSTEM_STATIC_LINK)
+# error Must not define both NDNBOOST_FILESYSTEM_DYN_LINK and NDNBOOST_FILESYSTEM_STATIC_LINK
+#endif
+
+#if defined(NDNBOOST_ALL_NO_LIB) && !defined(NDNBOOST_FILESYSTEM_NO_LIB)
+# define NDNBOOST_FILESYSTEM_NO_LIB 
+#endif
+
+//  enable dynamic linking  ------------------------------------------------------------//
+
+#if defined(NDNBOOST_ALL_DYN_LINK) || defined(NDNBOOST_FILESYSTEM_DYN_LINK)
+# if defined(NDNBOOST_FILESYSTEM_SOURCE)
+#   define NDNBOOST_FILESYSTEM_DECL NDNBOOST_SYMBOL_EXPORT
+# else 
+#   define NDNBOOST_FILESYSTEM_DECL NDNBOOST_SYMBOL_IMPORT
+# endif
+#else
+# define NDNBOOST_FILESYSTEM_DECL
+#endif
+
+//  enable automatic library variant selection  ----------------------------------------// 
+
+#if !defined(NDNBOOST_FILESYSTEM_SOURCE) && !defined(NDNBOOST_ALL_NO_LIB) \
+  && !defined(NDNBOOST_FILESYSTEM_NO_LIB)
+//
+// Set the name of our library, this will get undef'ed by auto_link.hpp
+// once it's done with it:
+//
+#define NDNBOOST_LIB_NAME ndnboost_filesystem
+//
+// If we're importing code from a dll, then tell auto_link.hpp about it:
+//
+#if defined(NDNBOOST_ALL_DYN_LINK) || defined(NDNBOOST_FILESYSTEM_DYN_LINK)
+#  define NDNBOOST_DYN_LINK
+#endif
+//
+// And include the header that does the work:
+//
+#include <ndnboost/config/auto_link.hpp>
+#endif  // auto-linking disabled
+
+#endif // NDNBOOST_FILESYSTEM3_CONFIG_HPP
diff --git a/include/ndnboost/filesystem/convenience.hpp b/include/ndnboost/filesystem/convenience.hpp
new file mode 100644
index 0000000..5e91750
--- /dev/null
+++ b/include/ndnboost/filesystem/convenience.hpp
@@ -0,0 +1,58 @@
+//  ndnboost/filesystem/convenience.hpp  ----------------------------------------//
+
+//  Copyright Beman Dawes, 2002-2005
+//  Copyright Vladimir Prus, 2002
+//  Use, modification, and distribution is subject to 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 library home page at http://www.boost.org/libs/filesystem
+
+//----------------------------------------------------------------------------// 
+
+#ifndef NDNBOOST_FILESYSTEM3_CONVENIENCE_HPP
+#define NDNBOOST_FILESYSTEM3_CONVENIENCE_HPP
+
+#include <ndnboost/config.hpp>
+
+# if defined( NDNBOOST_NO_STD_WSTRING )
+#   error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
+# endif
+
+#include <ndnboost/filesystem/operations.hpp>
+#include <ndnboost/system/error_code.hpp>
+
+#include <ndnboost/config/abi_prefix.hpp> // must be the last #include
+
+namespace ndnboost
+{
+  namespace filesystem
+  {
+
+# ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+
+    inline std::string extension(const path & p)
+    {
+      return p.extension().string();
+    }
+
+    inline std::string basename(const path & p)
+    {
+      return p.stem().string();
+    }
+
+    inline path change_extension( const path & p, const path & new_extension )
+    { 
+      path new_p( p );
+      new_p.replace_extension( new_extension );
+      return new_p;
+    }
+
+# endif
+
+
+  } // namespace filesystem
+} // namespace ndnboost
+
+#include <ndnboost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
+#endif // NDNBOOST_FILESYSTEM3_CONVENIENCE_HPP
diff --git a/include/ndnboost/filesystem/detail/utf8_codecvt_facet.hpp b/include/ndnboost/filesystem/detail/utf8_codecvt_facet.hpp
new file mode 100644
index 0000000..5e8251c
--- /dev/null
+++ b/include/ndnboost/filesystem/detail/utf8_codecvt_facet.hpp
@@ -0,0 +1,24 @@
+// Copyright (c) 2001 Ronald Garcia, Indiana University (garcia@osl.iu.edu)
+// Andrew Lumsdaine, Indiana University (lums@osl.iu.edu).
+
+// Distributed under the Boost Software License, Version 1.0.
+// (See http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef NDNBOOST_FILESYSTEM_UTF8_CODECVT_FACET_HPP
+#define NDNBOOST_FILESYSTEM_UTF8_CODECVT_FACET_HPP
+
+#include <ndnboost/filesystem/config.hpp>
+
+#define NDNBOOST_UTF8_BEGIN_NAMESPACE \
+     namespace ndnboost { namespace filesystem { namespace detail {
+
+#define NDNBOOST_UTF8_END_NAMESPACE }}}
+#define NDNBOOST_UTF8_DECL NDNBOOST_FILESYSTEM_DECL
+
+#include <ndnboost/detail/utf8_codecvt_facet.hpp>
+
+#undef NDNBOOST_UTF8_BEGIN_NAMESPACE
+#undef NDNBOOST_UTF8_END_NAMESPACE
+#undef NDNBOOST_UTF8_DECL
+
+#endif
diff --git a/include/ndnboost/filesystem/operations.hpp b/include/ndnboost/filesystem/operations.hpp
new file mode 100644
index 0000000..b395e49
--- /dev/null
+++ b/include/ndnboost/filesystem/operations.hpp
@@ -0,0 +1,1096 @@
+//  ndnboost/filesystem/operations.hpp  ---------------------------------------------------//
+
+//  Copyright Beman Dawes 2002-2009
+//  Copyright Jan Langer 2002
+//  Copyright Dietmar Kuehl 2001                                        
+//  Copyright Vladimir Prus 2002
+   
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//  Library home page: http://www.boost.org/libs/filesystem
+
+//--------------------------------------------------------------------------------------//
+
+#ifndef NDNBOOST_FILESYSTEM3_OPERATIONS_HPP
+#define NDNBOOST_FILESYSTEM3_OPERATIONS_HPP
+
+#include <ndnboost/config.hpp>
+
+# if defined( NDNBOOST_NO_STD_WSTRING )
+#   error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
+# endif
+
+#include <ndnboost/filesystem/config.hpp>
+#include <ndnboost/filesystem/path.hpp>
+
+#include <ndnboost/detail/scoped_enum_emulation.hpp>
+#include <ndnboost/detail/bitmask.hpp>
+#include <ndnboost/system/error_code.hpp>
+#include <ndnboost/system/system_error.hpp>
+#include <ndnboost/shared_ptr.hpp>
+#include <ndnboost/utility/enable_if.hpp>
+#include <ndnboost/type_traits/is_same.hpp>
+#include <ndnboost/iterator.hpp>
+#include <ndnboost/cstdint.hpp>
+#include <ndnboost/assert.hpp>
+
+#include <string>
+#include <utility> // for pair
+#include <ctime>
+#include <vector>
+#include <stack>
+
+#ifdef NDNBOOST_WINDOWS_API
+#  include <fstream>
+#endif
+
+#include <ndnboost/config/abi_prefix.hpp> // must be the last #include
+
+//--------------------------------------------------------------------------------------//
+
+namespace ndnboost
+{
+  namespace filesystem
+  {
+
+//--------------------------------------------------------------------------------------//
+//                                     file_type                                        //
+//--------------------------------------------------------------------------------------//
+
+  enum file_type
+  { 
+    status_error,
+#   ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+    status_unknown = status_error,
+#   endif
+    file_not_found,
+    regular_file,
+    directory_file,
+    // the following may not apply to some operating systems or file systems
+    symlink_file,
+    block_file,
+    character_file,
+    fifo_file,
+    socket_file,
+    reparse_file,  // Windows: FILE_ATTRIBUTE_REPARSE_POINT that is not a symlink
+    type_unknown,  // file does exist, but isn't one of the above types or
+                   // we don't have strong enough permission to find its type
+
+    _detail_directory_symlink  // internal use only; never exposed to users
+  };
+
+//--------------------------------------------------------------------------------------//
+//                                       perms                                          //
+//--------------------------------------------------------------------------------------//
+
+  enum perms
+  {
+    no_perms = 0,       // file_not_found is no_perms rather than perms_not_known
+
+    // POSIX equivalent macros given in comments.
+    // Values are from POSIX and are given in octal per the POSIX standard.
+
+    // permission bits
+    
+    owner_read = 0400,  // S_IRUSR, Read permission, owner
+    owner_write = 0200, // S_IWUSR, Write permission, owner
+    owner_exe = 0100,   // S_IXUSR, Execute/search permission, owner
+    owner_all = 0700,   // S_IRWXU, Read, write, execute/search by owner
+
+    group_read = 040,   // S_IRGRP, Read permission, group
+    group_write = 020,  // S_IWGRP, Write permission, group
+    group_exe = 010,    // S_IXGRP, Execute/search permission, group
+    group_all = 070,    // S_IRWXG, Read, write, execute/search by group
+
+    others_read = 04,   // S_IROTH, Read permission, others
+    others_write = 02,  // S_IWOTH, Write permission, others
+    others_exe = 01,    // S_IXOTH, Execute/search permission, others
+    others_all = 07,    // S_IRWXO, Read, write, execute/search by others
+
+    all_all = owner_all|group_all|others_all,  // 0777
+
+    // other POSIX bits
+
+    set_uid_on_exe = 04000, // S_ISUID, Set-user-ID on execution
+    set_gid_on_exe = 02000, // S_ISGID, Set-group-ID on execution
+    sticky_bit     = 01000, // S_ISVTX,
+                            // (POSIX XSI) On directories, restricted deletion flag 
+	                          // (V7) 'sticky bit': save swapped text even after use 
+                            // (SunOS) On non-directories: don't cache this file
+                            // (SVID-v4.2) On directories: restricted deletion flag
+                            // Also see http://en.wikipedia.org/wiki/Sticky_bit
+
+    perms_mask = all_all|set_uid_on_exe|set_gid_on_exe|sticky_bit,  // 07777
+
+    perms_not_known = 0xFFFF, // present when directory_entry cache not loaded
+
+    // options for permissions() function
+
+    add_perms = 0x1000,     // adds the given permission bits to the current bits
+    remove_perms = 0x2000,  // removes the given permission bits from the current bits;
+                            // choose add_perms or remove_perms, not both; if neither add_perms
+                            // nor remove_perms is given, replace the current bits with
+                            // the given bits.
+
+    symlink_perms = 0x4000  // on POSIX, don't resolve symlinks; implied on Windows
+  };
+
+  NDNBOOST_BITMASK(perms)
+
+//--------------------------------------------------------------------------------------//
+//                                    file_status                                       //
+//--------------------------------------------------------------------------------------//
+
+  class NDNBOOST_FILESYSTEM_DECL file_status
+  {
+  public:
+             file_status()            : m_value(status_error), m_perms(perms_not_known) {}
+    explicit file_status(file_type v, perms prms = perms_not_known)
+                                      : m_value(v), m_perms(prms) {}
+
+    // observers
+    file_type  type() const                       { return m_value; }
+    perms      permissions() const                { return m_perms; } 
+
+    // modifiers
+    void       type(file_type v)                  { m_value = v; }
+    void       permissions(perms prms)            { m_perms = prms; }
+
+    bool operator==(const file_status& rhs) const { return type() == rhs.type() && 
+                                                    permissions() == rhs.permissions(); }
+    bool operator!=(const file_status& rhs) const { return !(*this == rhs); }
+
+  private:
+    file_type   m_value;
+    enum perms  m_perms;
+  };
+
+  inline bool type_present(file_status f) { return f.type() != status_error; }
+  inline bool permissions_present(file_status f)
+                                          {return f.permissions() != perms_not_known;}
+  inline bool status_known(file_status f) { return type_present(f) && permissions_present(f); }
+  inline bool exists(file_status f)       { return f.type() != status_error
+                                                && f.type() != file_not_found; }
+  inline bool is_regular_file(file_status f){ return f.type() == regular_file; }
+  inline bool is_directory(file_status f) { return f.type() == directory_file; }
+  inline bool is_symlink(file_status f)   { return f.type() == symlink_file; }
+  inline bool is_other(file_status f)     { return exists(f) && !is_regular_file(f)
+                                                && !is_directory(f) && !is_symlink(f); }
+
+# ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+  inline bool is_regular(file_status f)   { return f.type() == regular_file; }
+# endif
+
+  struct space_info
+  {
+    // all values are byte counts
+    ndnboost::uintmax_t capacity;
+    ndnboost::uintmax_t free;      // <= capacity
+    ndnboost::uintmax_t available; // <= free
+  };
+
+  NDNBOOST_SCOPED_ENUM_START(copy_option)
+    {none, fail_if_exists = none, overwrite_if_exists};
+  NDNBOOST_SCOPED_ENUM_END
+
+//--------------------------------------------------------------------------------------//
+//                             implementation details                                   //
+//--------------------------------------------------------------------------------------//
+
+  namespace detail
+  {
+    NDNBOOST_FILESYSTEM_DECL
+    file_status status(const path&p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    file_status symlink_status(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    bool is_empty(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    path initial_path(system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    path canonical(const path& p, const path& base, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void copy(const path& from, const path& to, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void copy_directory(const path& from, const path& to, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void copy_file(const path& from, const path& to,
+                    NDNBOOST_SCOPED_ENUM(copy_option) option,  // See ticket #2925
+                    system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void copy_symlink(const path& existing_symlink, const path& new_symlink, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    bool create_directories(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    bool create_directory(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void create_directory_symlink(const path& to, const path& from,
+                                  system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void create_hard_link(const path& to, const path& from, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void create_symlink(const path& to, const path& from, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    path current_path(system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void current_path(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    bool equivalent(const path& p1, const path& p2, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    ndnboost::uintmax_t file_size(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    ndnboost::uintmax_t hard_link_count(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    std::time_t last_write_time(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void last_write_time(const path& p, const std::time_t new_time,
+                         system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void permissions(const path& p, perms prms, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    path read_symlink(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+      // For standardization, if the committee doesn't like "remove", consider "eliminate"
+    bool remove(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    ndnboost::uintmax_t remove_all(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void rename(const path& old_p, const path& new_p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    void resize_file(const path& p, uintmax_t size, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    space_info space(const path& p, system::error_code* ec=0); 
+    NDNBOOST_FILESYSTEM_DECL
+    path system_complete(const path& p, system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    path temp_directory_path(system::error_code* ec=0);
+    NDNBOOST_FILESYSTEM_DECL
+    path unique_path(const path& p, system::error_code* ec=0);
+  }  // namespace detail
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                             status query functions                                   //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+
+  inline
+  file_status status(const path& p)    {return detail::status(p);}
+  inline 
+  file_status status(const path& p, system::error_code& ec)
+                                       {return detail::status(p, &ec);}
+  inline 
+  file_status symlink_status(const path& p) {return detail::symlink_status(p);}
+  inline
+  file_status symlink_status(const path& p, system::error_code& ec)
+                                       {return detail::symlink_status(p, &ec);}
+  inline 
+  bool exists(const path& p)           {return exists(detail::status(p));}
+  inline 
+  bool exists(const path& p, system::error_code& ec)
+                                       {return exists(detail::status(p, &ec));}
+  inline 
+  bool is_directory(const path& p)     {return is_directory(detail::status(p));}
+  inline 
+  bool is_directory(const path& p, system::error_code& ec)
+                                       {return is_directory(detail::status(p, &ec));}
+  inline 
+  bool is_regular_file(const path& p)  {return is_regular_file(detail::status(p));}
+  inline 
+  bool is_regular_file(const path& p, system::error_code& ec)
+                                       {return is_regular_file(detail::status(p, &ec));}
+  inline 
+  bool is_other(const path& p)         {return is_other(detail::status(p));}
+  inline 
+  bool is_other(const path& p, system::error_code& ec)
+                                       {return is_other(detail::status(p, &ec));}
+  inline
+  bool is_symlink(const path& p)       {return is_symlink(detail::symlink_status(p));}
+  inline 
+  bool is_symlink(const path& p, system::error_code& ec)
+                                       {return is_symlink(detail::symlink_status(p, &ec));}
+# ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+  inline
+  bool is_regular(const path& p)       {return is_regular(detail::status(p));}
+  inline
+  bool is_regular(const path& p, system::error_code& ec)
+                                       {return is_regular(detail::status(p, &ec));}
+# endif
+
+  inline
+  bool is_empty(const path& p)         {return detail::is_empty(p);}
+  inline
+  bool is_empty(const path& p, system::error_code& ec)
+                                       {return detail::is_empty(p, &ec);}
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                             operational functions                                    //
+//                  in alphabetical order, unless otherwise noted                       //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+ 
+  //  forward declarations
+  path current_path();  // fwd declaration
+  path initial_path();
+
+  NDNBOOST_FILESYSTEM_DECL
+  path absolute(const path& p, const path& base=current_path());
+  //  If base.is_absolute(), throws nothing. Thus no need for ec argument
+
+  inline
+  path canonical(const path& p, const path& base=current_path())
+                                       {return detail::canonical(p, base);}
+  inline
+  path canonical(const path& p, system::error_code& ec)
+                                       {return detail::canonical(p, current_path(), &ec);}
+  inline
+  path canonical(const path& p, const path& base, system::error_code& ec)
+                                       {return detail::canonical(p, base, &ec);}
+
+# ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+  inline
+  path complete(const path& p)
+  {
+    return absolute(p, initial_path());
+  }
+
+  inline
+  path complete(const path& p, const path& base)
+  {
+    return absolute(p, base);
+  }
+# endif
+
+  inline
+  void copy(const path& from, const path& to) {detail::copy(from, to);}
+
+  inline
+  void copy(const path& from, const path& to, system::error_code& ec) 
+                                       {detail::copy(from, to, &ec);}
+  inline
+  void copy_directory(const path& from, const path& to)
+                                       {detail::copy_directory(from, to);}
+  inline
+  void copy_directory(const path& from, const path& to, system::error_code& ec)
+                                       {detail::copy_directory(from, to, &ec);}
+  inline
+  void copy_file(const path& from, const path& to,   // See ticket #2925
+                 NDNBOOST_SCOPED_ENUM(copy_option) option)
+                                       {detail::copy_file(from, to, option);}
+  inline
+  void copy_file(const path& from, const path& to)
+                                       {detail::copy_file(from, to, copy_option::fail_if_exists);}
+  inline
+  void copy_file(const path& from, const path& to,   // See ticket #2925
+                 NDNBOOST_SCOPED_ENUM(copy_option) option, system::error_code& ec)
+                                       {detail::copy_file(from, to, option, &ec);}
+  inline
+  void copy_file(const path& from, const path& to, system::error_code& ec)
+                                       {detail::copy_file(from, to, copy_option::fail_if_exists, &ec);}
+  inline
+  void copy_symlink(const path& existing_symlink, const path& new_symlink) {detail::copy_symlink(existing_symlink, new_symlink);}
+
+  inline
+  void copy_symlink(const path& existing_symlink, const path& new_symlink, system::error_code& ec)
+                                       {detail::copy_symlink(existing_symlink, new_symlink, &ec);}
+  inline
+  bool create_directories(const path& p) {return detail::create_directories(p);}
+
+  inline
+  bool create_directories(const path& p, system::error_code& ec)
+                                       {return detail::create_directories(p, &ec);}
+  inline
+  bool create_directory(const path& p) {return detail::create_directory(p);}
+
+  inline
+  bool create_directory(const path& p, system::error_code& ec)
+                                       {return detail::create_directory(p, &ec);}
+  inline
+  void create_directory_symlink(const path& to, const path& from)
+                                       {detail::create_directory_symlink(to, from);}
+  inline
+  void create_directory_symlink(const path& to, const path& from, system::error_code& ec)
+                                       {detail::create_directory_symlink(to, from, &ec);}
+  inline
+  void create_hard_link(const path& to, const path& new_hard_link) {detail::create_hard_link(to, new_hard_link);}
+
+  inline
+  void create_hard_link(const path& to, const path& new_hard_link, system::error_code& ec)
+                                       {detail::create_hard_link(to, new_hard_link, &ec);}
+  inline
+  void create_symlink(const path& to, const path& new_symlink) {detail::create_symlink(to, new_symlink);}
+
+  inline
+  void create_symlink(const path& to, const path& new_symlink, system::error_code& ec)
+                                       {detail::create_symlink(to, new_symlink, &ec);}
+  inline
+  path current_path()                  {return detail::current_path();}
+
+  inline
+  path current_path(system::error_code& ec) {return detail::current_path(&ec);}
+
+  inline
+  void current_path(const path& p)     {detail::current_path(p);}
+
+  inline
+  void current_path(const path& p, system::error_code& ec) {detail::current_path(p, &ec);}
+
+  inline
+  bool equivalent(const path& p1, const path& p2) {return detail::equivalent(p1, p2);}
+
+  inline
+  bool equivalent(const path& p1, const path& p2, system::error_code& ec)
+                                       {return detail::equivalent(p1, p2, &ec);}
+  inline
+  ndnboost::uintmax_t file_size(const path& p) {return detail::file_size(p);}
+
+  inline
+  ndnboost::uintmax_t file_size(const path& p, system::error_code& ec)
+                                       {return detail::file_size(p, &ec);}
+  inline
+  ndnboost::uintmax_t hard_link_count(const path& p) {return detail::hard_link_count(p);}
+
+  inline
+  ndnboost::uintmax_t hard_link_count(const path& p, system::error_code& ec)
+                                       {return detail::hard_link_count(p, &ec);}
+  inline
+  path initial_path()                  {return detail::initial_path();}
+
+  inline
+  path initial_path(system::error_code& ec) {return detail::initial_path(&ec);}
+
+  template <class Path>
+  path initial_path() {return initial_path();}
+  template <class Path>
+  path initial_path(system::error_code& ec) {return detail::initial_path(&ec);}
+
+  inline
+  std::time_t last_write_time(const path& p) {return detail::last_write_time(p);}
+
+  inline
+  std::time_t last_write_time(const path& p, system::error_code& ec)
+                                       {return detail::last_write_time(p, &ec);}
+  inline
+  void last_write_time(const path& p, const std::time_t new_time)
+                                       {detail::last_write_time(p, new_time);}
+  inline
+  void last_write_time(const path& p, const std::time_t new_time, system::error_code& ec)
+                                       {detail::last_write_time(p, new_time, &ec);}
+  inline
+  void permissions(const path& p, perms prms)
+                                       {detail::permissions(p, prms);}
+  inline
+  void permissions(const path& p, perms prms, system::error_code& ec)
+                                       {detail::permissions(p, prms, &ec);}
+
+  inline
+  path read_symlink(const path& p)     {return detail::read_symlink(p);}
+
+  inline
+  path read_symlink(const path& p, system::error_code& ec)
+                                       {return detail::read_symlink(p, &ec);}
+  inline
+    // For standardization, if the committee doesn't like "remove", consider "eliminate"
+  bool remove(const path& p)           {return detail::remove(p);}
+
+  inline
+  bool remove(const path& p, system::error_code& ec) {return detail::remove(p, &ec);}
+
+  inline
+  ndnboost::uintmax_t remove_all(const path& p) {return detail::remove_all(p);}
+    
+  inline
+  ndnboost::uintmax_t remove_all(const path& p, system::error_code& ec)
+                                       {return detail::remove_all(p, &ec);}
+  inline
+  void rename(const path& old_p, const path& new_p) {detail::rename(old_p, new_p);}
+
+  inline
+  void rename(const path& old_p, const path& new_p, system::error_code& ec)
+                                       {detail::rename(old_p, new_p, &ec);}
+  inline  // name suggested by Scott McMurray
+  void resize_file(const path& p, uintmax_t size) {detail::resize_file(p, size);}
+
+  inline
+  void resize_file(const path& p, uintmax_t size, system::error_code& ec)
+                                       {detail::resize_file(p, size, &ec);}
+  inline
+  space_info space(const path& p)      {return detail::space(p);} 
+
+  inline
+  space_info space(const path& p, system::error_code& ec) {return detail::space(p, &ec);} 
+
+# ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+  inline bool symbolic_link_exists(const path& p)
+                                       { return is_symlink(symlink_status(p)); }
+# endif
+
+  inline
+  path system_complete(const path& p)  {return detail::system_complete(p);}
+
+  inline
+  path system_complete(const path& p, system::error_code& ec)
+                                       {return detail::system_complete(p, &ec);}
+  inline
+  path temp_directory_path()           {return detail::temp_directory_path();}
+
+  inline
+  path temp_directory_path(system::error_code& ec) 
+                                       {return detail::temp_directory_path(&ec);}
+  inline
+  path unique_path(const path& p="%%%%-%%%%-%%%%-%%%%")
+                                       { return detail::unique_path(p); }
+  inline
+  path unique_path(const path& p, system::error_code& ec)
+                                       { return detail::unique_path(p, &ec); }
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                                 directory_entry                                      //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+
+//  GCC has a problem with a member function named path within a namespace or 
+//  sub-namespace that also has a class named path. The workaround is to always
+//  fully qualify the name path when it refers to the class name.
+
+class NDNBOOST_FILESYSTEM_DECL directory_entry
+{
+public:
+
+  // compiler generated copy constructor, copy assignment, and destructor apply
+
+  directory_entry() {}
+  explicit directory_entry(const ndnboost::filesystem::path& p,
+    file_status st = file_status(), file_status symlink_st=file_status())
+    : m_path(p), m_status(st), m_symlink_status(symlink_st)
+    {}
+
+  void assign(const ndnboost::filesystem::path& p,
+    file_status st = file_status(), file_status symlink_st = file_status())
+    { m_path = p; m_status = st; m_symlink_status = symlink_st; }
+
+  void replace_filename(const ndnboost::filesystem::path& p,
+    file_status st = file_status(), file_status symlink_st = file_status())
+  {
+    m_path.remove_filename();
+    m_path /= p;
+    m_status = st;
+    m_symlink_status = symlink_st;
+  }
+
+# ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+  void replace_leaf(const ndnboost::filesystem::path& p,
+    file_status st, file_status symlink_st)
+      { replace_filename(p, st, symlink_st); }
+# endif
+
+  const ndnboost::filesystem::path&  path() const               {return m_path;}
+  file_status   status() const                               {return m_get_status();}
+  file_status   status(system::error_code& ec) const         {return m_get_status(&ec);}
+  file_status   symlink_status() const                       {return m_get_symlink_status();}
+  file_status   symlink_status(system::error_code& ec) const {return m_get_symlink_status(&ec);}
+
+  bool operator==(const directory_entry& rhs) {return m_path == rhs.m_path;} 
+  bool operator!=(const directory_entry& rhs) {return m_path != rhs.m_path;} 
+  bool operator< (const directory_entry& rhs) {return m_path < rhs.m_path;} 
+  bool operator<=(const directory_entry& rhs) {return m_path <= rhs.m_path;} 
+  bool operator> (const directory_entry& rhs) {return m_path > rhs.m_path;} 
+  bool operator>=(const directory_entry& rhs) {return m_path >= rhs.m_path;} 
+
+private:
+  ndnboost::filesystem::path   m_path;
+  mutable file_status       m_status;           // stat()-like
+  mutable file_status       m_symlink_status;   // lstat()-like
+
+  file_status m_get_status(system::error_code* ec=0) const;
+  file_status m_get_symlink_status(system::error_code* ec=0) const;
+}; // directory_entry
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                            directory_iterator helpers                                //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+
+class directory_iterator;
+
+namespace detail
+{
+  NDNBOOST_FILESYSTEM_DECL
+    system::error_code dir_itr_close(// never throws()
+    void *& handle
+#   if     defined(NDNBOOST_POSIX_API)
+    , void *& buffer
+#   endif
+  ); 
+
+  struct dir_itr_imp
+  {
+    directory_entry  dir_entry;
+    void*            handle;
+
+#   ifdef NDNBOOST_POSIX_API
+    void*            buffer;  // see dir_itr_increment implementation
+#   endif
+
+    dir_itr_imp() : handle(0)
+#   ifdef NDNBOOST_POSIX_API
+      , buffer(0)
+#   endif
+    {}
+
+    ~dir_itr_imp() // never throws
+    {
+      dir_itr_close(handle
+#       if defined(NDNBOOST_POSIX_API)
+         , buffer
+#       endif
+    );
+    }
+  };
+
+  // see path::iterator: comment below
+  NDNBOOST_FILESYSTEM_DECL void directory_iterator_construct(directory_iterator& it,
+    const path& p, system::error_code* ec);
+  NDNBOOST_FILESYSTEM_DECL void directory_iterator_increment(directory_iterator& it,
+    system::error_code* ec);
+
+}  // namespace detail
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                                directory_iterator                                    //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+
+  class directory_iterator
+    : public ndnboost::iterator_facade< directory_iterator,
+                                     directory_entry,
+                                     ndnboost::single_pass_traversal_tag >
+  {
+  public:
+
+    directory_iterator(){}  // creates the "end" iterator
+
+    // iterator_facade derived classes don't seem to like implementations in
+    // separate translation unit dll's, so forward to detail functions
+    explicit directory_iterator(const path& p)
+        : m_imp(new detail::dir_itr_imp)
+          { detail::directory_iterator_construct(*this, p, 0); }
+
+    directory_iterator(const path& p, system::error_code& ec)
+        : m_imp(new detail::dir_itr_imp)
+          { detail::directory_iterator_construct(*this, p, &ec); }
+
+   ~directory_iterator() {} // never throws
+
+    directory_iterator& increment(system::error_code& ec)
+    { 
+      detail::directory_iterator_increment(*this, &ec);
+      return *this;
+    }
+
+  private:
+    friend struct detail::dir_itr_imp;
+    friend NDNBOOST_FILESYSTEM_DECL void detail::directory_iterator_construct(directory_iterator& it,
+      const path& p, system::error_code* ec);
+    friend NDNBOOST_FILESYSTEM_DECL void detail::directory_iterator_increment(directory_iterator& it,
+      system::error_code* ec);
+
+    // shared_ptr provides shallow-copy semantics required for InputIterators.
+    // m_imp.get()==0 indicates the end iterator.
+    ndnboost::shared_ptr< detail::dir_itr_imp >  m_imp;
+
+    friend class ndnboost::iterator_core_access;
+
+    ndnboost::iterator_facade<
+      directory_iterator,
+      directory_entry,
+      ndnboost::single_pass_traversal_tag >::reference dereference() const 
+    {
+      NDNBOOST_ASSERT_MSG(m_imp.get(), "attempt to dereference end iterator");
+      return m_imp->dir_entry;
+    }
+
+    void increment() { detail::directory_iterator_increment(*this, 0); }
+
+    bool equal(const directory_iterator& rhs) const
+      { return m_imp == rhs.m_imp; }
+  };
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                      recursive_directory_iterator helpers                            //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+
+  NDNBOOST_SCOPED_ENUM_START(symlink_option)
+  {
+    none,
+    no_recurse = none,         // don't follow directory symlinks (default behavior)
+    recurse,                   // follow directory symlinks
+    _detail_no_push = recurse << 1  // internal use only
+  };
+  NDNBOOST_SCOPED_ENUM_END
+
+  NDNBOOST_BITMASK(NDNBOOST_SCOPED_ENUM(symlink_option))
+
+  namespace detail
+  {
+    struct recur_dir_itr_imp
+    {
+      typedef directory_iterator element_type;
+      std::stack< element_type, std::vector< element_type > > m_stack;
+      int  m_level;
+      NDNBOOST_SCOPED_ENUM(symlink_option) m_options;
+
+      recur_dir_itr_imp() : m_level(0), m_options(symlink_option::none) {}
+
+      void increment(system::error_code* ec);  // ec == 0 means throw on error
+
+      void pop();
+
+    };
+
+    //  Implementation is inline to avoid dynamic linking difficulties with m_stack:
+    //  Microsoft warning C4251, m_stack needs to have dll-interface to be used by
+    //  clients of struct 'ndnboost::filesystem::detail::recur_dir_itr_imp'
+
+    inline
+    void recur_dir_itr_imp::increment(system::error_code* ec)
+    // ec == 0 means throw on error
+    {
+      if ((m_options & symlink_option::_detail_no_push) == symlink_option::_detail_no_push)
+        m_options &= ~symlink_option::_detail_no_push;
+
+      else
+      {
+        // Logic for following predicate was contributed by Daniel Aarno to handle cyclic
+        // symlinks correctly and efficiently, fixing ticket #5652.
+        //   if (((m_options & symlink_option::recurse) == symlink_option::recurse
+        //         || !is_symlink(m_stack.top()->symlink_status()))
+        //       && is_directory(m_stack.top()->status())) ...
+        // The predicate code has since been rewritten to pass error_code arguments,
+        // per ticket #5653.
+        bool or_pred = (m_options & symlink_option::recurse) == symlink_option::recurse
+                       || (ec == 0 ? !is_symlink(m_stack.top()->symlink_status())
+                                   : !is_symlink(m_stack.top()->symlink_status(*ec)));
+        if (ec != 0 && *ec)
+          return;
+        bool and_pred = or_pred && (ec == 0 ? is_directory(m_stack.top()->status())
+                                            : is_directory(m_stack.top()->status(*ec)));
+        if (ec != 0 && *ec)
+          return;
+
+        if (and_pred)
+        {
+          if (ec == 0)
+            m_stack.push(directory_iterator(m_stack.top()->path()));
+          else
+          {
+            m_stack.push(directory_iterator(m_stack.top()->path(), *ec));
+            if (*ec)
+              return;
+          }
+          if (m_stack.top() != directory_iterator())
+          {
+            ++m_level;
+            return;
+          }
+          m_stack.pop();
+        }
+      }
+
+      while (!m_stack.empty() && ++m_stack.top() == directory_iterator())
+      {
+        m_stack.pop();
+        --m_level;
+      }
+    }
+
+    inline
+    void recur_dir_itr_imp::pop()
+    {
+      NDNBOOST_ASSERT_MSG(m_level > 0,
+        "pop() on recursive_directory_iterator with level < 1");
+
+      do
+      {
+        m_stack.pop();
+        --m_level;
+      }
+      while (!m_stack.empty() && ++m_stack.top() == directory_iterator());
+    }
+  } // namespace detail
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                           recursive_directory_iterator                               //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+
+  class recursive_directory_iterator
+    : public ndnboost::iterator_facade<
+        recursive_directory_iterator,
+        directory_entry,
+        ndnboost::single_pass_traversal_tag >
+  {
+  public:
+
+    recursive_directory_iterator(){}  // creates the "end" iterator
+
+    explicit recursive_directory_iterator(const path& dir_path,
+      NDNBOOST_SCOPED_ENUM(symlink_option) opt = symlink_option::none)
+      : m_imp(new detail::recur_dir_itr_imp)
+    {
+      m_imp->m_options = opt;
+      m_imp->m_stack.push(directory_iterator(dir_path));
+      if (m_imp->m_stack.top() == directory_iterator())
+        { m_imp.reset (); }
+    }
+
+    recursive_directory_iterator(const path& dir_path,
+      NDNBOOST_SCOPED_ENUM(symlink_option) opt,
+      system::error_code & ec)
+    : m_imp(new detail::recur_dir_itr_imp)
+    {
+      m_imp->m_options = opt;
+      m_imp->m_stack.push(directory_iterator(dir_path, ec));
+      if (m_imp->m_stack.top() == directory_iterator())
+        { m_imp.reset (); }
+    }
+
+    recursive_directory_iterator(const path& dir_path,
+      system::error_code & ec)
+    : m_imp(new detail::recur_dir_itr_imp)
+    {
+      m_imp->m_options = symlink_option::none;
+      m_imp->m_stack.push(directory_iterator(dir_path, ec));
+      if (m_imp->m_stack.top() == directory_iterator())
+        { m_imp.reset (); }
+    }
+
+    recursive_directory_iterator& increment(system::error_code& ec)
+    {
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "increment() on end recursive_directory_iterator");
+      m_imp->increment(&ec);
+      if (m_imp->m_stack.empty())
+        m_imp.reset(); // done, so make end iterator
+      return *this;
+    }
+
+    int level() const
+    { 
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "level() on end recursive_directory_iterator");
+      return m_imp->m_level;
+    }
+
+    bool no_push_pending() const
+    {
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "is_no_push_requested() on end recursive_directory_iterator");
+      return (m_imp->m_options & symlink_option::_detail_no_push)
+        == symlink_option::_detail_no_push;
+    }
+
+#   ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+    bool no_push_request() const { return no_push_pending(); }
+#   endif
+
+    void pop()
+    { 
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "pop() on end recursive_directory_iterator");
+      m_imp->pop();
+      if (m_imp->m_stack.empty()) m_imp.reset(); // done, so make end iterator
+    }
+
+    void no_push(bool value=true)
+    {
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "no_push() on end recursive_directory_iterator");
+      if (value)
+        m_imp->m_options |= symlink_option::_detail_no_push;
+      else
+        m_imp->m_options &= ~symlink_option::_detail_no_push;
+    }
+
+    file_status status() const
+    {
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "status() on end recursive_directory_iterator");
+      return m_imp->m_stack.top()->status();
+    }
+
+    file_status symlink_status() const
+    {
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "symlink_status() on end recursive_directory_iterator");
+      return m_imp->m_stack.top()->symlink_status();
+    }
+
+  private:
+
+    // shared_ptr provides shallow-copy semantics required for InputIterators.
+    // m_imp.get()==0 indicates the end iterator.
+    ndnboost::shared_ptr< detail::recur_dir_itr_imp >  m_imp;
+
+    friend class ndnboost::iterator_core_access;
+
+    ndnboost::iterator_facade< 
+      recursive_directory_iterator,
+      directory_entry,
+      ndnboost::single_pass_traversal_tag >::reference
+    dereference() const 
+    {
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "dereference of end recursive_directory_iterator");
+      return *m_imp->m_stack.top();
+    }
+
+    void increment()
+    { 
+      NDNBOOST_ASSERT_MSG(m_imp.get(),
+        "increment of end recursive_directory_iterator");
+      m_imp->increment(0);
+      if (m_imp->m_stack.empty())
+        m_imp.reset(); // done, so make end iterator
+    }
+
+    bool equal(const recursive_directory_iterator& rhs) const
+      { return m_imp == rhs.m_imp; }
+
+  };
+
+# if !defined(NDNBOOST_FILESYSTEM_NO_DEPRECATED)
+  typedef recursive_directory_iterator wrecursive_directory_iterator;
+# endif
+
+//--------------------------------------------------------------------------------------//
+//                                                                                      //
+//                            class filesystem_error                                    //
+//                                                                                      //
+//--------------------------------------------------------------------------------------//
+  
+  class NDNBOOST_SYMBOL_VISIBLE filesystem_error : public system::system_error
+  {
+  // see http://www.boost.org/more/error_handling.html for design rationale
+
+  // all functions are inline to avoid issues with crossing dll boundaries
+
+  public:
+    // compiler generates copy constructor and copy assignment
+
+    filesystem_error(
+      const std::string & what_arg, system::error_code ec)
+      : system::system_error(ec, what_arg)
+    {
+      try
+      {
+        m_imp_ptr.reset(new m_imp);
+      }
+      catch (...) { m_imp_ptr.reset(); }
+    }
+
+    filesystem_error(
+      const std::string & what_arg, const path& path1_arg,
+      system::error_code ec)
+      : system::system_error(ec, what_arg)
+    {
+      try
+      {
+        m_imp_ptr.reset(new m_imp);
+        m_imp_ptr->m_path1 = path1_arg;
+      }
+      catch (...) { m_imp_ptr.reset(); }
+    }
+    
+    filesystem_error(
+      const std::string & what_arg, const path& path1_arg,
+      const path& path2_arg, system::error_code ec)
+      : system::system_error(ec, what_arg)
+    {
+      try
+      {
+        m_imp_ptr.reset(new m_imp);
+        m_imp_ptr->m_path1 = path1_arg;
+        m_imp_ptr->m_path2 = path2_arg;
+      }
+      catch (...) { m_imp_ptr.reset(); }
+    }
+
+    ~filesystem_error() throw() {}
+
+    const path& path1() const
+    {
+      static const path empty_path;
+      return m_imp_ptr.get() ? m_imp_ptr->m_path1 : empty_path ;
+    }
+    const path& path2() const
+    {
+      static const path empty_path;
+      return m_imp_ptr.get() ? m_imp_ptr->m_path2 : empty_path ;
+    }
+
+    const char* what() const throw()
+    {
+      if (!m_imp_ptr.get())
+        return system::system_error::what();
+
+      try
+      {
+        if (m_imp_ptr->m_what.empty())
+        {
+          m_imp_ptr->m_what = system::system_error::what();
+          if (!m_imp_ptr->m_path1.empty())
+          {
+            m_imp_ptr->m_what += ": \"";
+            m_imp_ptr->m_what += m_imp_ptr->m_path1.string();
+            m_imp_ptr->m_what += "\"";
+          }
+          if (!m_imp_ptr->m_path2.empty())
+          {
+            m_imp_ptr->m_what += ", \"";
+            m_imp_ptr->m_what += m_imp_ptr->m_path2.string();
+            m_imp_ptr->m_what += "\"";
+          }
+        }
+        return m_imp_ptr->m_what.c_str();
+      }
+      catch (...)
+      {
+        return system::system_error::what();
+      }
+    }
+
+  private:
+    struct m_imp
+    {
+      path         m_path1; // may be empty()
+      path         m_path2; // may be empty()
+      std::string  m_what;  // not built until needed
+    };
+    ndnboost::shared_ptr<m_imp> m_imp_ptr;
+  };
+
+//  test helper  -----------------------------------------------------------------------//
+
+//  Not part of the documented interface since false positives are possible;
+//  there is no law that says that an OS that has large stat.st_size
+//  actually supports large file sizes.
+
+  namespace detail
+  {
+    NDNBOOST_FILESYSTEM_DECL bool possible_large_file_size_support();
+  }
+
+  } // namespace filesystem
+} // namespace ndnboost
+
+#include <ndnboost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
+#endif // NDNBOOST_FILESYSTEM3_OPERATIONS_HPP
diff --git a/include/ndnboost/filesystem/path.hpp b/include/ndnboost/filesystem/path.hpp
new file mode 100644
index 0000000..8dee66f
--- /dev/null
+++ b/include/ndnboost/filesystem/path.hpp
@@ -0,0 +1,758 @@
+//  filesystem path.hpp  ---------------------------------------------------------------//
+
+//  Copyright Beman Dawes 2002-2005, 2009
+//  Copyright Vladimir Prus 2002
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//  Library home page: http://www.boost.org/libs/filesystem
+
+//  path::stem(), extension(), and replace_extension() are based on
+//  basename(), extension(), and change_extension() from the original
+//  filesystem/convenience.hpp header by Vladimir Prus.
+
+#ifndef NDNBOOST_FILESYSTEM_PATH_HPP
+#define NDNBOOST_FILESYSTEM_PATH_HPP
+
+#include <ndnboost/config.hpp>
+
+# if defined( NDNBOOST_NO_STD_WSTRING )
+#   error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
+# endif
+
+#include <ndnboost/filesystem/config.hpp>
+#include <ndnboost/filesystem/path_traits.hpp>  // includes <cwchar>
+#include <ndnboost/system/error_code.hpp>
+#include <ndnboost/system/system_error.hpp>
+#include <ndnboost/iterator/iterator_facade.hpp>
+#include <ndnboost/shared_ptr.hpp>
+#include <ndnboost/io/detail/quoted_manip.hpp>
+#include <ndnboost/static_assert.hpp>
+#include <ndnboost/functional/hash_fwd.hpp>
+#include <ndnboost/type_traits/is_integral.hpp>
+#include <string>
+#include <iterator>
+#include <cstring>
+#include <iosfwd>
+#include <stdexcept>
+#include <cassert>
+#include <locale>
+#include <algorithm>
+
+#include <ndnboost/config/abi_prefix.hpp> // must be the last #include
+
+namespace ndnboost
+{
+namespace filesystem
+{
+  //------------------------------------------------------------------------------------//
+  //                                                                                    //
+  //                                    class path                                      //
+  //                                                                                    //
+  //------------------------------------------------------------------------------------//
+
+  class NDNBOOST_FILESYSTEM_DECL path
+  {
+  public:
+
+    //  value_type is the character type used by the operating system API to
+    //  represent paths.
+
+# ifdef NDNBOOST_WINDOWS_API
+    typedef wchar_t                        value_type;
+    NDNBOOST_STATIC_CONSTEXPR value_type      preferred_separator = L'\\';
+# else 
+    typedef char                           value_type;
+    NDNBOOST_STATIC_CONSTEXPR value_type      preferred_separator = '/';
+# endif
+    typedef std::basic_string<value_type>  string_type;  
+    typedef std::codecvt<wchar_t, char,
+                         std::mbstate_t>   codecvt_type;
+
+
+    //  ----- character encoding conversions -----
+
+    //  Following the principle of least astonishment, path input arguments
+    //  passed to or obtained from the operating system via objects of
+    //  class path behave as if they were directly passed to or
+    //  obtained from the O/S API, unless conversion is explicitly requested.
+    //
+    //  POSIX specfies that path strings are passed unchanged to and from the
+    //  API. Note that this is different from the POSIX command line utilities,
+    //  which convert according to a locale.
+    //
+    //  Thus for POSIX, char strings do not undergo conversion.  wchar_t strings
+    //  are converted to/from char using the path locale or, if a conversion
+    //  argument is given, using a conversion object modeled on
+    //  std::wstring_convert.
+    //
+    //  The path locale, which is global to the thread, can be changed by the
+    //  imbue() function. It is initialized to an implementation defined locale.
+    //  
+    //  For Windows, wchar_t strings do not undergo conversion. char strings
+    //  are converted using the "ANSI" or "OEM" code pages, as determined by
+    //  the AreFileApisANSI() function, or, if a conversion argument is given,
+    //  using a conversion object modeled on std::wstring_convert.
+    //
+    //  See m_pathname comments for further important rationale.
+
+    //  TODO: rules needed for operating systems that use / or .
+    //  differently, or format directory paths differently from file paths. 
+    //
+    //  **********************************************************************************
+    //
+    //  More work needed: How to handle an operating system that may have
+    //  slash characters or dot characters in valid filenames, either because
+    //  it doesn't follow the POSIX standard, or because it allows MBCS
+    //  filename encodings that may contain slash or dot characters. For
+    //  example, ISO/IEC 2022 (JIS) encoding which allows switching to
+    //  JIS x0208-1983 encoding. A valid filename in this set of encodings is
+    //  0x1B 0x24 0x42 [switch to X0208-1983] 0x24 0x2F [U+304F Kiragana letter KU]
+    //                                             ^^^^
+    //  Note that 0x2F is the ASCII slash character
+    //
+    //  **********************************************************************************
+
+    //  Supported source arguments: half-open iterator range, container, c-array,
+    //  and single pointer to null terminated string.
+
+    //  All source arguments except pointers to null terminated byte strings support
+    //  multi-byte character strings which may have embedded nulls. Embedded null
+    //  support is required for some Asian languages on Windows.
+
+    //  [defaults] "const codecvt_type& cvt=codecvt()" default arguments are not used
+    //  because some compilers, such as Microsoft prior to VC++ 10, do not handle defaults
+    //  correctly in templates.
+
+    //  -----  constructors  -----
+
+    path(){}                                          
+
+    path(const path& p) : m_pathname(p.m_pathname) {}
+
+    template <class Source>
+    path(Source const& source,
+      typename ndnboost::enable_if<path_traits::is_pathable<
+        typename ndnboost::decay<Source>::type> >::type* =0)
+    {
+      path_traits::dispatch(source, m_pathname, codecvt());
+    }
+
+    //  Overloads for the operating system API's native character type. Rationale:
+    //    - Avoids use of codecvt() for native value_type strings. This limits the
+    //      impact of locale("") initialization failures on POSIX systems to programs
+    //      that actually depend on locale(""). It further ensures that exceptions thrown
+    //      as a result of such failues occur after main() has started, so can be caught.
+    //      This is a partial resolution of tickets 4688, 5100, and 5289.
+    //    - A slight optimization for a common use case, particularly on POSIX since
+    //      value_type is char and that is the most common useage.
+    path(const value_type* s) : m_pathname(s) {}
+    path(const std::basic_string<value_type>& s) : m_pathname(s) {}
+
+    template <class Source>
+    path(Source const& source, const codecvt_type& cvt)
+    //  see [defaults] note above explaining why codecvt() default arguments are not used
+    {
+      path_traits::dispatch(source, m_pathname, cvt);
+    }
+
+    template <class InputIterator>
+    path(InputIterator begin, InputIterator end)
+    { 
+      if (begin != end)
+      {
+        std::basic_string<typename std::iterator_traits<InputIterator>::value_type>
+          s(begin, end);
+        path_traits::convert(s.c_str(), s.c_str()+s.size(), m_pathname, codecvt());
+      }
+    }
+
+    template <class InputIterator>
+    path(InputIterator begin, InputIterator end, const codecvt_type& cvt)
+    { 
+      if (begin != end)
+      {
+        std::basic_string<typename std::iterator_traits<InputIterator>::value_type>
+          s(begin, end);
+        path_traits::convert(s.c_str(), s.c_str()+s.size(), m_pathname, cvt);
+      }
+    }
+
+    //  -----  assignments  -----
+
+    path& operator=(const path& p)
+    {
+      m_pathname = p.m_pathname;
+      return *this;
+    }
+
+    path& operator=(const value_type* ptr)  // required in case ptr overlaps *this
+    {
+      m_pathname = ptr;
+      return *this;
+    }
+
+    template <class Source>
+      typename ndnboost::enable_if<path_traits::is_pathable<
+        typename ndnboost::decay<Source>::type>, path&>::type
+    operator=(Source const& source)
+    {
+      m_pathname.clear();
+      path_traits::dispatch(source, m_pathname, codecvt());
+      return *this;
+    }
+
+    path& assign(const value_type* ptr, const codecvt_type&)  // required in case ptr overlaps *this
+    {
+      m_pathname = ptr;
+      return *this;
+    }
+
+    template <class Source>
+    path& assign(Source const& source, const codecvt_type& cvt)
+    {
+      m_pathname.clear();
+      path_traits::dispatch(source, m_pathname, cvt);
+      return *this;
+    }
+
+    template <class InputIterator>
+    path& assign(InputIterator begin, InputIterator end)
+    {
+      return assign(begin, end, codecvt());
+    }
+
+    template <class InputIterator>
+    path& assign(InputIterator begin, InputIterator end, const codecvt_type& cvt)
+    { 
+      m_pathname.clear();
+      if (begin != end)
+      {
+        std::basic_string<typename std::iterator_traits<InputIterator>::value_type>
+          s(begin, end);
+        path_traits::convert(s.c_str(), s.c_str()+s.size(), m_pathname, cvt);
+      }
+      return *this;
+    }
+
+    //  -----  concatenation  -----
+
+    path& operator+=(const path& p)         {m_pathname += p.m_pathname; return *this;}
+    path& operator+=(const string_type& s)  {m_pathname += s; return *this;}
+    path& operator+=(const value_type* ptr) {m_pathname += ptr; return *this;}
+    path& operator+=(value_type c)          {m_pathname += c; return *this;}
+
+    template <class Source>
+      typename ndnboost::enable_if<path_traits::is_pathable<
+        typename ndnboost::decay<Source>::type>, path&>::type
+    operator+=(Source const& source)
+    {
+      return concat(source, codecvt());
+    }
+
+    template <class CharT>
+      typename ndnboost::enable_if<is_integral<CharT>, path&>::type
+    operator+=(CharT c)
+    {
+      CharT tmp[2];
+      tmp[0] = c;
+      tmp[1] = 0;
+      return concat(tmp, codecvt());
+    }
+
+    template <class Source>
+    path& concat(Source const& source, const codecvt_type& cvt)
+    {
+      path_traits::dispatch(source, m_pathname, cvt);
+      return *this;
+    }
+
+    template <class InputIterator>
+    path& concat(InputIterator begin, InputIterator end)
+    { 
+      return concat(begin, end, codecvt());
+    }
+
+    template <class InputIterator>
+    path& concat(InputIterator begin, InputIterator end, const codecvt_type& cvt)
+    { 
+      if (begin == end)
+        return *this;
+      std::basic_string<typename std::iterator_traits<InputIterator>::value_type>
+        s(begin, end);
+      path_traits::convert(s.c_str(), s.c_str()+s.size(), m_pathname, cvt);
+      return *this;
+    }
+
+    //  -----  appends  -----
+
+    //  if a separator is added, it is the preferred separator for the platform;
+    //  slash for POSIX, backslash for Windows
+
+    path& operator/=(const path& p);
+
+    path& operator/=(const value_type* ptr);
+
+    template <class Source>
+      typename ndnboost::enable_if<path_traits::is_pathable<
+        typename ndnboost::decay<Source>::type>, path&>::type
+    operator/=(Source const& source)
+    {
+      return append(source, codecvt());
+    }
+
+    path& append(const value_type* ptr, const codecvt_type&)  // required in case ptr overlaps *this
+    {
+      this->operator/=(ptr);
+      return *this;
+    }
+
+    template <class Source>
+    path& append(Source const& source, const codecvt_type& cvt);
+
+    template <class InputIterator>
+    path& append(InputIterator begin, InputIterator end)
+    { 
+      return append(begin, end, codecvt());
+    }
+
+    template <class InputIterator>
+    path& append(InputIterator begin, InputIterator end, const codecvt_type& cvt);
+
+    //  -----  modifiers  -----
+
+    void   clear()             { m_pathname.clear(); }
+    path&  make_preferred()
+#   ifdef NDNBOOST_POSIX_API
+      { return *this; }  // POSIX no effect
+#   else // NDNBOOST_WINDOWS_API
+      ;  // change slashes to backslashes
+#   endif
+    path&  remove_filename();
+    path&  replace_extension(const path& new_extension = path());
+    void   swap(path& rhs)     { m_pathname.swap(rhs.m_pathname); }
+
+    //  -----  observers  -----
+  
+    //  For operating systems that format file paths differently than directory
+    //  paths, return values from observers are formatted as file names unless there
+    //  is a trailing separator, in which case returns are formatted as directory
+    //  paths. POSIX and Windows make no such distinction.
+
+    //  Implementations are permitted to return const values or const references.
+
+    //  The string or path returned by an observer are specified as being formatted
+    //  as "native" or "generic".
+    //
+    //  For POSIX, these are all the same format; slashes and backslashes are as input and
+    //  are not modified.
+    //
+    //  For Windows,   native:    as input; slashes and backslashes are not modified;
+    //                            this is the format of the internally stored string.
+    //                 generic:   backslashes are converted to slashes
+
+    //  -----  native format observers  -----
+
+    const string_type&  native() const { return m_pathname; }          // Throws: nothing
+    const value_type*   c_str() const  { return m_pathname.c_str(); }  // Throws: nothing
+
+    template <class String>
+    String string() const;
+
+    template <class String>
+    String string(const codecvt_type& cvt) const;
+
+#   ifdef NDNBOOST_WINDOWS_API
+    const std::string string() const { return string(codecvt()); } 
+    const std::string string(const codecvt_type& cvt) const
+    { 
+      std::string tmp;
+      if (!m_pathname.empty())
+        path_traits::convert(&*m_pathname.begin(), &*m_pathname.begin()+m_pathname.size(),
+          tmp, cvt);
+      return tmp;
+    }
+    
+    //  string_type is std::wstring, so there is no conversion
+    const std::wstring&  wstring() const { return m_pathname; }
+    const std::wstring&  wstring(const codecvt_type&) const { return m_pathname; }
+
+#   else   // NDNBOOST_POSIX_API
+    //  string_type is std::string, so there is no conversion
+    const std::string&  string() const { return m_pathname; }
+    const std::string&  string(const codecvt_type&) const { return m_pathname; }
+
+    const std::wstring  wstring() const { return wstring(codecvt()); }
+    const std::wstring  wstring(const codecvt_type& cvt) const
+    { 
+      std::wstring tmp;
+      if (!m_pathname.empty())
+        path_traits::convert(&*m_pathname.begin(), &*m_pathname.begin()+m_pathname.size(),
+          tmp, cvt);
+      return tmp;
+    }
+
+#   endif
+
+    //  -----  generic format observers  -----
+
+    template <class String>
+    String generic_string() const;
+
+    template <class String>
+    String generic_string(const codecvt_type& cvt) const;
+
+#   ifdef NDNBOOST_WINDOWS_API
+    const std::string   generic_string() const { return generic_string(codecvt()); } 
+    const std::string   generic_string(const codecvt_type& cvt) const; 
+    const std::wstring  generic_wstring() const;
+    const std::wstring  generic_wstring(const codecvt_type&) const { return generic_wstring(); };
+
+#   else // NDNBOOST_POSIX_API
+    //  On POSIX-like systems, the generic format is the same as the native format
+    const std::string&  generic_string() const  { return m_pathname; }
+    const std::string&  generic_string(const codecvt_type&) const  { return m_pathname; }
+    const std::wstring  generic_wstring() const { return wstring(codecvt()); }
+    const std::wstring  generic_wstring(const codecvt_type& cvt) const { return wstring(cvt); }
+
+#   endif
+
+    //  -----  compare  -----
+
+    int compare(const path& p) const NDNBOOST_NOEXCEPT;  // generic, lexicographical
+    int compare(const std::string& s) const { return compare(path(s)); }
+    int compare(const value_type* s) const  { return compare(path(s)); }
+
+    //  -----  decomposition  -----
+
+    path  root_path() const; 
+    path  root_name() const;         // returns 0 or 1 element path
+                                     // even on POSIX, root_name() is non-empty() for network paths
+    path  root_directory() const;    // returns 0 or 1 element path
+    path  relative_path() const;
+    path  parent_path() const;
+    path  filename() const;          // returns 0 or 1 element path
+    path  stem() const;              // returns 0 or 1 element path
+    path  extension() const;         // returns 0 or 1 element path
+
+    //  -----  query  -----
+
+    bool empty() const               { return m_pathname.empty(); } // name consistent with std containers
+    bool has_root_path() const       { return has_root_directory() || has_root_name(); }
+    bool has_root_name() const       { return !root_name().empty(); }
+    bool has_root_directory() const  { return !root_directory().empty(); }
+    bool has_relative_path() const   { return !relative_path().empty(); }
+    bool has_parent_path() const     { return !parent_path().empty(); }
+    bool has_filename() const        { return !m_pathname.empty(); }
+    bool has_stem() const            { return !stem().empty(); }
+    bool has_extension() const       { return !extension().empty(); }
+    bool is_absolute() const
+    {
+#     ifdef NDNBOOST_WINDOWS_API
+      return has_root_name() && has_root_directory();
+#     else
+      return has_root_directory();
+#     endif
+    }
+    bool is_relative() const         { return !is_absolute(); } 
+
+    //  -----  iterators  -----
+
+    class iterator;
+    typedef iterator const_iterator;
+
+    iterator begin() const;
+    iterator end() const;
+
+    //  -----  static member functions  -----
+
+    static std::locale  imbue(const std::locale& loc);
+    static const        codecvt_type& codecvt();
+
+    //  -----  deprecated functions  -----
+
+# if defined(NDNBOOST_FILESYSTEM_DEPRECATED) && defined(NDNBOOST_FILESYSTEM_NO_DEPRECATED)
+#   error both NDNBOOST_FILESYSTEM_DEPRECATED and NDNBOOST_FILESYSTEM_NO_DEPRECATED are defined
+# endif
+
+# if !defined(NDNBOOST_FILESYSTEM_NO_DEPRECATED)
+    //  recently deprecated functions supplied by default
+    path&  normalize()              { return m_normalize(); }
+    path&  remove_leaf()            { return remove_filename(); }
+    path   leaf() const             { return filename(); }
+    path   branch_path() const      { return parent_path(); }
+    bool   has_leaf() const         { return !m_pathname.empty(); }
+    bool   has_branch_path() const  { return !parent_path().empty(); }
+    bool   is_complete() const      { return is_absolute(); }
+# endif
+
+# if defined(NDNBOOST_FILESYSTEM_DEPRECATED)
+    //  deprecated functions with enough signature or semantic changes that they are
+    //  not supplied by default 
+    const std::string file_string() const               { return string(); }
+    const std::string directory_string() const          { return string(); }
+    const std::string native_file_string() const        { return string(); }
+    const std::string native_directory_string() const   { return string(); }
+    const string_type external_file_string() const      { return native(); }
+    const string_type external_directory_string() const { return native(); }
+
+    //  older functions no longer supported
+    //typedef bool (*name_check)(const std::string & name);
+    //basic_path(const string_type& str, name_check) { operator/=(str); }
+    //basic_path(const typename string_type::value_type* s, name_check)
+    //  { operator/=(s);}
+    //static bool default_name_check_writable() { return false; } 
+    //static void default_name_check(name_check) {}
+    //static name_check default_name_check() { return 0; }
+    //basic_path& canonize();
+# endif
+
+//--------------------------------------------------------------------------------------//
+//                            class path private members                                //
+//--------------------------------------------------------------------------------------//
+
+  private:
+#   if defined(_MSC_VER)
+#     pragma warning(push) // Save warning settings
+#     pragma warning(disable : 4251) // disable warning: class 'std::basic_string<_Elem,_Traits,_Ax>'
+#   endif                            // needs to have dll-interface...
+/*
+      m_pathname has the type, encoding, and format required by the native
+      operating system. Thus for POSIX and Windows there is no conversion for
+      passing m_pathname.c_str() to the O/S API or when obtaining a path from the
+      O/S API. POSIX encoding is unspecified other than for dot and slash
+      characters; POSIX just treats paths as a sequence of bytes. Windows
+      encoding is UCS-2 or UTF-16 depending on the version.
+*/
+    string_type  m_pathname;  // Windows: as input; backslashes NOT converted to slashes,
+                              // slashes NOT converted to backslashes
+#   if defined(_MSC_VER)
+#     pragma warning(pop) // restore warning settings.
+#   endif 
+
+    string_type::size_type m_append_separator_if_needed();
+    //  Returns: If separator is to be appended, m_pathname.size() before append. Otherwise 0.
+    //  Note: An append is never performed if size()==0, so a returned 0 is unambiguous.
+
+    void m_erase_redundant_separator(string_type::size_type sep_pos);
+    string_type::size_type m_parent_path_end() const;
+
+    path& m_normalize();
+
+    // Was qualified; como433beta8 reports:
+    //    warning #427-D: qualified name is not allowed in member declaration 
+    friend class iterator;
+    friend bool operator<(const path& lhs, const path& rhs);
+
+    // see path::iterator::increment/decrement comment below
+    static void m_path_iterator_increment(path::iterator & it);
+    static void m_path_iterator_decrement(path::iterator & it);
+
+  };  // class path
+
+  namespace detail
+  {
+    NDNBOOST_FILESYSTEM_DECL
+      int lex_compare(path::iterator first1, path::iterator last1,
+        path::iterator first2, path::iterator last2);
+  }
+
+# ifndef NDNBOOST_FILESYSTEM_NO_DEPRECATED
+  typedef path wpath;
+# endif
+
+  //------------------------------------------------------------------------------------//
+  //                             class path::iterator                                   //
+  //------------------------------------------------------------------------------------//
+ 
+  class path::iterator
+    : public ndnboost::iterator_facade<
+      path::iterator,
+      path const,
+      ndnboost::bidirectional_traversal_tag >
+  {
+  private:
+    friend class ndnboost::iterator_core_access;
+    friend class ndnboost::filesystem::path;
+    friend void m_path_iterator_increment(path::iterator & it);
+    friend void m_path_iterator_decrement(path::iterator & it);
+
+    const path& dereference() const { return m_element; }
+
+    bool equal(const iterator & rhs) const
+    {
+      return m_path_ptr == rhs.m_path_ptr && m_pos == rhs.m_pos;
+    }
+
+    // iterator_facade derived classes don't seem to like implementations in
+    // separate translation unit dll's, so forward to class path static members
+    void increment() { m_path_iterator_increment(*this); }
+    void decrement() { m_path_iterator_decrement(*this); }
+
+    path                    m_element;   // current element
+    const path*             m_path_ptr;  // path being iterated over
+    string_type::size_type  m_pos;       // position of m_element in
+                                         // m_path_ptr->m_pathname.
+                                         // if m_element is implicit dot, m_pos is the
+                                         // position of the last separator in the path.
+                                         // end() iterator is indicated by 
+                                         // m_pos == m_path_ptr->m_pathname.size()
+  }; // path::iterator
+
+  //------------------------------------------------------------------------------------//
+  //                                                                                    //
+  //                              non-member functions                                  //
+  //                                                                                    //
+  //------------------------------------------------------------------------------------//
+
+  //  std::lexicographical_compare would infinately recurse because path iterators
+  //  yield paths, so provide a path aware version
+  inline bool lexicographical_compare(path::iterator first1, path::iterator last1,
+    path::iterator first2, path::iterator last2)
+    { return detail::lex_compare(first1, last1, first2, last2) < 0; }
+  
+  inline bool operator==(const path& lhs, const path& rhs)              {return lhs.compare(rhs) == 0;}
+  inline bool operator==(const path& lhs, const path::string_type& rhs) {return lhs.compare(rhs) == 0;} 
+  inline bool operator==(const path::string_type& lhs, const path& rhs) {return rhs.compare(lhs) == 0;}
+  inline bool operator==(const path& lhs, const path::value_type* rhs)  {return lhs.compare(rhs) == 0;}
+  inline bool operator==(const path::value_type* lhs, const path& rhs)  {return rhs.compare(lhs) == 0;}
+  
+  inline bool operator!=(const path& lhs, const path& rhs)              {return lhs.compare(rhs) != 0;}
+  inline bool operator!=(const path& lhs, const path::string_type& rhs) {return lhs.compare(rhs) != 0;} 
+  inline bool operator!=(const path::string_type& lhs, const path& rhs) {return rhs.compare(lhs) != 0;}
+  inline bool operator!=(const path& lhs, const path::value_type* rhs)  {return lhs.compare(rhs) != 0;}
+  inline bool operator!=(const path::value_type* lhs, const path& rhs)  {return rhs.compare(lhs) != 0;}
+
+  // TODO: why do == and != have additional overloads, but the others don't?
+
+  inline bool operator<(const path& lhs, const path& rhs)  {return lhs.compare(rhs) < 0;}
+  inline bool operator<=(const path& lhs, const path& rhs) {return !(rhs < lhs);}
+  inline bool operator> (const path& lhs, const path& rhs) {return rhs < lhs;}
+  inline bool operator>=(const path& lhs, const path& rhs) {return !(lhs < rhs);}
+
+  inline std::size_t hash_value(const path& x)
+  {
+# ifdef NDNBOOST_WINDOWS_API
+    std::size_t seed = 0;
+    for(const path::value_type* it = x.c_str(); *it; ++it)
+      hash_combine(seed, *it == '/' ? L'\\' : *it);
+    return seed;
+# else   // NDNBOOST_POSIX_API
+    return hash_range(x.native().begin(), x.native().end());
+# endif
+  }
+
+  inline void swap(path& lhs, path& rhs)                   { lhs.swap(rhs); }
+
+  inline path operator/(const path& lhs, const path& rhs)  { return path(lhs) /= rhs; }
+
+  //  inserters and extractors
+  //    use ndnboost::io::quoted() to handle spaces in paths
+  //    use '&' as escape character to ease use for Windows paths
+
+  template <class Char, class Traits>
+  inline std::basic_ostream<Char, Traits>&
+  operator<<(std::basic_ostream<Char, Traits>& os, const path& p)
+  {
+    return os
+      << ndnboost::io::quoted(p.template string<std::basic_string<Char> >(), static_cast<Char>('&'));
+  }
+  
+  template <class Char, class Traits>
+  inline std::basic_istream<Char, Traits>&
+  operator>>(std::basic_istream<Char, Traits>& is, path& p)
+  {
+    std::basic_string<Char> str;
+    is >> ndnboost::io::quoted(str, static_cast<Char>('&'));
+    p = str;
+    return is;
+  }
+  
+  //  name_checks
+
+  //  These functions are holdovers from version 1. It isn't clear they have much
+  //  usefulness, or how to generalize them for later versions.
+
+  NDNBOOST_FILESYSTEM_DECL bool portable_posix_name(const std::string & name);
+  NDNBOOST_FILESYSTEM_DECL bool windows_name(const std::string & name);
+  NDNBOOST_FILESYSTEM_DECL bool portable_name(const std::string & name);
+  NDNBOOST_FILESYSTEM_DECL bool portable_directory_name(const std::string & name);
+  NDNBOOST_FILESYSTEM_DECL bool portable_file_name(const std::string & name);
+  NDNBOOST_FILESYSTEM_DECL bool native(const std::string & name);
+ 
+//--------------------------------------------------------------------------------------//
+//                     class path member template implementation                        //
+//--------------------------------------------------------------------------------------//
+
+  template <class InputIterator>
+  path& path::append(InputIterator begin, InputIterator end, const codecvt_type& cvt)
+  { 
+    if (begin == end)
+      return *this;
+    string_type::size_type sep_pos(m_append_separator_if_needed());
+    std::basic_string<typename std::iterator_traits<InputIterator>::value_type>
+      s(begin, end);
+    path_traits::convert(s.c_str(), s.c_str()+s.size(), m_pathname, cvt);
+    if (sep_pos)
+      m_erase_redundant_separator(sep_pos);
+    return *this;
+  }
+
+  template <class Source>
+  path& path::append(Source const& source, const codecvt_type& cvt)
+  {
+    if (path_traits::empty(source))
+      return *this;
+    string_type::size_type sep_pos(m_append_separator_if_needed());
+    path_traits::dispatch(source, m_pathname, cvt);
+    if (sep_pos)
+      m_erase_redundant_separator(sep_pos);
+    return *this;
+  }
+
+//--------------------------------------------------------------------------------------//
+//                     class path member template specializations                       //
+//--------------------------------------------------------------------------------------//
+
+  template <> inline
+  std::string path::string<std::string>() const
+    { return string(); }
+
+  template <> inline
+  std::wstring path::string<std::wstring>() const
+    { return wstring(); }
+
+  template <> inline
+  std::string path::string<std::string>(const codecvt_type& cvt) const
+    { return string(cvt); }
+
+  template <> inline
+  std::wstring path::string<std::wstring>(const codecvt_type& cvt) const
+    { return wstring(cvt); }
+
+  template <> inline
+  std::string path::generic_string<std::string>() const
+    { return generic_string(); }
+
+  template <> inline
+  std::wstring path::generic_string<std::wstring>() const
+    { return generic_wstring(); }
+
+  template <> inline
+  std::string path::generic_string<std::string>(const codecvt_type& cvt) const
+    { return generic_string(cvt); }
+
+  template <> inline
+  std::wstring path::generic_string<std::wstring>(const codecvt_type& cvt) const
+    { return generic_wstring(cvt); }
+
+
+}  // namespace filesystem
+}  // namespace ndnboost
+
+//----------------------------------------------------------------------------//
+
+#include <ndnboost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
+
+#endif  // NDNBOOST_FILESYSTEM_PATH_HPP
diff --git a/include/ndnboost/filesystem/path_traits.hpp b/include/ndnboost/filesystem/path_traits.hpp
new file mode 100644
index 0000000..34e13a9
--- /dev/null
+++ b/include/ndnboost/filesystem/path_traits.hpp
@@ -0,0 +1,235 @@
+//  filesystem path_traits.hpp  --------------------------------------------------------//
+
+//  Copyright Beman Dawes 2009
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+//  Library home page: http://www.boost.org/libs/filesystem
+
+#ifndef NDNBOOST_FILESYSTEM_PATH_TRAITS_HPP
+#define NDNBOOST_FILESYSTEM_PATH_TRAITS_HPP
+
+#include <ndnboost/config.hpp>
+
+# if defined( NDNBOOST_NO_STD_WSTRING )
+#   error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support
+# endif
+
+#include <ndnboost/filesystem/config.hpp>
+#include <ndnboost/utility/enable_if.hpp>
+#include <ndnboost/type_traits/is_array.hpp>
+#include <ndnboost/type_traits/decay.hpp>
+#include <ndnboost/system/error_code.hpp>
+#include <cwchar>  // for mbstate_t
+#include <string>
+#include <vector>
+#include <list>
+#include <iterator>
+#include <locale>
+#include <ndnboost/assert.hpp>
+// #include <iostream>   //**** comment me out ****
+
+#include <ndnboost/config/abi_prefix.hpp> // must be the last #include
+
+namespace ndnboost { namespace filesystem {
+
+  NDNBOOST_FILESYSTEM_DECL const system::error_category& codecvt_error_category();
+  //  uses std::codecvt_base::result used for error codes:
+  //
+  //    ok:       Conversion successful.
+  //    partial:  Not all source characters converted; one or more additional source
+  //              characters are needed to produce the final target character, or the
+  //              size of the target intermediate buffer was too small to hold the result.
+  //    error:    A character in the source could not be converted to the target encoding.
+  //    noconv:   The source and target characters have the same type and encoding, so no
+  //              conversion was necessary.
+
+  class directory_entry;
+  
+namespace path_traits {
+ 
+  typedef std::codecvt<wchar_t, char, std::mbstate_t> codecvt_type;
+
+  //  is_pathable type trait; allows disabling over-agressive class path member templates
+
+  template <class T>
+  struct is_pathable { static const bool value = false; };
+
+  template<> struct is_pathable<char*>                  { static const bool value = true; };
+  template<> struct is_pathable<const char*>            { static const bool value = true; };
+  template<> struct is_pathable<wchar_t*>               { static const bool value = true; };
+  template<> struct is_pathable<const wchar_t*>         { static const bool value = true; };
+  template<> struct is_pathable<std::string>            { static const bool value = true; };
+  template<> struct is_pathable<std::wstring>           { static const bool value = true; };
+  template<> struct is_pathable<std::vector<char> >     { static const bool value = true; };
+  template<> struct is_pathable<std::vector<wchar_t> >  { static const bool value = true; };
+  template<> struct is_pathable<std::list<char> >       { static const bool value = true; };
+  template<> struct is_pathable<std::list<wchar_t> >    { static const bool value = true; };
+  template<> struct is_pathable<directory_entry>        { static const bool value = true; };
+
+  //  Pathable empty
+
+  template <class Container> inline
+    // disable_if aids broken compilers (IBM, old GCC, etc.) and is harmless for
+    // conforming compilers. Replace by plain "bool" at some future date (2012?) 
+    typename ndnboost::disable_if<ndnboost::is_array<Container>, bool>::type
+      empty(const Container & c)
+        { return c.begin() == c.end(); }
+
+  template <class T> inline
+    bool empty(T * const & c_str)
+  {
+    NDNBOOST_ASSERT(c_str);
+    return !*c_str;
+  }
+
+  template <typename T, size_t N> inline
+     bool empty(T (&x)[N])
+       { return !x[0]; }
+
+  // value types differ  ---------------------------------------------------------------//
+  //
+  //   A from_end argument of 0 is less efficient than a known end, so use only if needed
+  
+  NDNBOOST_FILESYSTEM_DECL
+  void convert(const char* from,
+                const char* from_end,    // 0 for null terminated MBCS
+                std::wstring & to,
+                const codecvt_type& cvt);
+
+  NDNBOOST_FILESYSTEM_DECL
+  void convert(const wchar_t* from,
+                const wchar_t* from_end,  // 0 for null terminated MBCS
+                std::string & to,
+                const codecvt_type& cvt);
+
+  inline 
+  void convert(const char* from,
+                std::wstring & to,
+                const codecvt_type& cvt)
+  {
+    NDNBOOST_ASSERT(from);
+    convert(from, 0, to, cvt);
+  }
+
+  inline 
+  void convert(const wchar_t* from,
+                std::string & to,
+                const codecvt_type& cvt)
+  {
+    NDNBOOST_ASSERT(from);
+    convert(from, 0, to, cvt);
+  }
+
+  // value types same  -----------------------------------------------------------------//
+
+  // char
+
+  inline 
+  void convert(const char* from, const char* from_end, std::string & to,
+    const codecvt_type&)
+  {
+    NDNBOOST_ASSERT(from);
+    NDNBOOST_ASSERT(from_end);
+    to.append(from, from_end);
+  }
+
+  inline 
+  void convert(const char* from,
+                std::string & to,
+                const codecvt_type&)
+  {
+    NDNBOOST_ASSERT(from);
+    to += from;
+  }
+
+  // wchar_t
+
+  inline 
+  void convert(const wchar_t* from, const wchar_t* from_end, std::wstring & to,
+    const codecvt_type&)
+  {
+    NDNBOOST_ASSERT(from);
+    NDNBOOST_ASSERT(from_end);
+    to.append(from, from_end);
+  }
+
+  inline 
+  void convert(const wchar_t* from,
+                std::wstring & to,
+                const codecvt_type&)
+  {
+    NDNBOOST_ASSERT(from);
+    to += from;
+  }
+
+  //  Source dispatch  -----------------------------------------------------------------//
+
+  //  contiguous containers
+  template <class U> inline
+    void dispatch(const std::string& c, U& to, const codecvt_type& cvt)
+  {
+    if (c.size())
+      convert(&*c.begin(), &*c.begin() + c.size(), to, cvt);
+  }
+  template <class U> inline
+    void dispatch(const std::wstring& c, U& to, const codecvt_type& cvt)
+  {
+    if (c.size())
+      convert(&*c.begin(), &*c.begin() + c.size(), to, cvt);
+  }
+  template <class U> inline
+    void dispatch(const std::vector<char>& c, U& to, const codecvt_type& cvt)
+  {
+    if (c.size())
+      convert(&*c.begin(), &*c.begin() + c.size(), to, cvt);
+  }
+  template <class U> inline
+    void dispatch(const std::vector<wchar_t>& c, U& to, const codecvt_type& cvt)
+  {
+    if (c.size())
+      convert(&*c.begin(), &*c.begin() + c.size(), to, cvt);
+  }
+
+  //  non-contiguous containers
+  template <class Container, class U> inline
+    // disable_if aids broken compilers (IBM, old GCC, etc.) and is harmless for
+    // conforming compilers. Replace by plain "void" at some future date (2012?) 
+    typename ndnboost::disable_if<ndnboost::is_array<Container>, void>::type
+      dispatch(const Container & c, U& to, const codecvt_type& cvt)
+  {
+    if (c.size())
+    {
+      std::basic_string<typename Container::value_type> s(c.begin(), c.end());
+      convert(s.c_str(), s.c_str()+s.size(), to, cvt);
+    }
+  }
+
+  //  c_str
+  template <class T, class U> inline
+  void dispatch(T * const & c_str, U& to, const codecvt_type& cvt)
+  {
+//    std::cout << "dispatch() const T *\n";
+    NDNBOOST_ASSERT(c_str);
+    convert(c_str, to, cvt);
+  }
+  
+  //  Note: there is no dispatch on C-style arrays because the array may
+  //  contain a string smaller than the array size. 
+
+  NDNBOOST_FILESYSTEM_DECL
+  void dispatch(const directory_entry & de,
+#                ifdef NDNBOOST_WINDOWS_API
+                   std::wstring & to,
+#                else   
+                   std::string & to,
+#                endif
+                 const codecvt_type&);
+
+
+}}} // namespace ndnboost::filesystem::path_traits
+
+#include <ndnboost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas
+
+#endif  // NDNBOOST_FILESYSTEM_PATH_TRAITS_HPP