Ticket #10900: boost.patch.165

diff -cr boost_1_65_1/libs/filesystem/src/operations.cpp boost_1_65_1.mod/libs/filesystem/src/operations.cpp
*** boost_1_65_1/libs/filesystem/src/operations.cpp     2017-09-02 11:56:12.000000000 +0200
--- boost_1_65_1.mod/libs/filesystem/src/operations.cpp 2017-09-22 10:42:52.713234509 +0200
***************
*** 172,177 ****
--- 172,183 ----
  # ifndef IO_REPARSE_TAG_SYMLINK
  #   define IO_REPARSE_TAG_SYMLINK (0xA000000CL)
  # endif
+ # ifndef IO_REPARSE_TAG_MOUNT_POINT
+ #   define IO_REPARSE_TAG_MOUNT_POINT (0xA0000003L)
+ # endif
+ # ifndef IO_REPARSE_TAG_DEDUP
+ #   define IO_REPARSE_TAG_DEDUP (0x80000013L)
+ # endif

  inline std::wstring wgetenv(const wchar_t* name)
  {
***************
*** 684,690 ****
        hTemplateFile);
    }

!   bool is_reparse_point_a_symlink(const path& p)
    {
      handle_wrapper h(create_file_handle(p, FILE_READ_EA,
        FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING,
--- 690,696 ----
        hTemplateFile);
    }

!   ULONG get_reparse_tag(const path& p)
    {
      handle_wrapper h(create_file_handle(p, FILE_READ_EA,
        FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING,
***************
*** 700,716 ****
        MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &dwRetLen, NULL);
      if (!result) return false;

!     return reinterpret_cast<const REPARSE_DATA_BUFFER*>(buf.get())->ReparseTag
!         == IO_REPARSE_TAG_SYMLINK
!         // Issue 9016 asked that NTFS directory junctions be recognized as directories.
!         // That is equivalent to recognizing them as symlinks, and then the normal symlink
!         // mechanism will take care of recognizing them as directories.
!         //
!         // Directory junctions are very similar to symlinks, but have some performance
!         // and other advantages over symlinks. They can be created from the command line
!         // with "mklink /j junction-name target-path".
!       || reinterpret_cast<const REPARSE_DATA_BUFFER*>(buf.get())->ReparseTag
!         == IO_REPARSE_TAG_MOUNT_POINT;  // aka "directory junction" or "junction"
    }

    inline std::size_t get_full_path_name(
--- 706,712 ----
        MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &dwRetLen, NULL);
      if (!result) return false;

!     return reinterpret_cast<const REPARSE_DATA_BUFFER*>(buf.get())->ReparseTag;
    }

    inline std::size_t get_full_path_name(
***************
*** 754,765 ****

      if (attr & FILE_ATTRIBUTE_REPARSE_POINT)
      {
!       if (is_reparse_point_a_symlink(p))
          return (attr & FILE_ATTRIBUTE_DIRECTORY)
            ? fs::_detail_directory_symlink
            : fs::symlink_file;
        return fs::reparse_file;
      }

      return (attr & FILE_ATTRIBUTE_DIRECTORY)
        ? fs::directory_file
--- 750,771 ----

      if (attr & FILE_ATTRIBUTE_REPARSE_POINT)
      {
!        switch(get_reparse_tag(p))
!        {
!        case IO_REPARSE_TAG_DEDUP:
!           return (attr & FILE_ATTRIBUTE_DIRECTORY)
!              ? fs::directory_file
!              : fs::regular_file;
!        case IO_REPARSE_TAG_MOUNT_POINT:
!           return fs::directory_file;
!        case IO_REPARSE_TAG_SYMLINK:
          return (attr & FILE_ATTRIBUTE_DIRECTORY)
            ? fs::_detail_directory_symlink
            : fs::symlink_file;
+        default:
        return fs::reparse_file;
      }
+     }

      return (attr & FILE_ATTRIBUTE_DIRECTORY)
        ? fs::directory_file
***************
*** 1818,1826 ****
          return process_status_failure(p, ec);
        }

!       if (!is_reparse_point_a_symlink(p))
          return file_status(reparse_file, make_permissions(p, attr));
      }

      if (ec != 0) ec->clear();
      return (attr & FILE_ATTRIBUTE_DIRECTORY)
--- 1824,1840 ----
          return process_status_failure(p, ec);
        }

!       switch(get_reparse_tag(p))
!       {
!        case IO_REPARSE_TAG_DEDUP:
!        case IO_REPARSE_TAG_SYMLINK:
!        case IO_REPARSE_TAG_MOUNT_POINT:
!           // Treat deduplicated files/dirs, mount points and symlinks as normals files/dirs
!           break;
!        default:
          return file_status(reparse_file, make_permissions(p, attr));
      }
+     }

      if (ec != 0) ec->clear();
      return (attr & FILE_ATTRIBUTE_DIRECTORY)
***************
*** 1885,1898 ****
      if (ec != 0) ec->clear();

      if (attr & FILE_ATTRIBUTE_REPARSE_POINT)
!       return is_reparse_point_a_symlink(p)
!              ? file_status(symlink_file, make_permissions(p, attr))
!              : file_status(reparse_file, make_permissions(p, attr));
!
      return (attr & FILE_ATTRIBUTE_DIRECTORY)
        ? file_status(directory_file, make_permissions(p, attr))
        : file_status(regular_file, make_permissions(p, attr));
-
  #   endif
    }

--- 1899,1920 ----
      if (ec != 0) ec->clear();

      if (attr & FILE_ATTRIBUTE_REPARSE_POINT)
!     {
!       switch(get_reparse_tag(p))
!       {
!        case IO_REPARSE_TAG_DEDUP:
!        case IO_REPARSE_TAG_MOUNT_POINT:
!           // Treat deduplicated files and mount points just as their normal counterparts
!           break;
!        case IO_REPARSE_TAG_SYMLINK:
!           return file_status(symlink_file, make_permissions(p, attr));
!        default:
!           return file_status(reparse_file, make_permissions(p, attr));
!       }
!     }
      return (attr & FILE_ATTRIBUTE_DIRECTORY)
        ? file_status(directory_file, make_permissions(p, attr))
        : file_status(regular_file, make_permissions(p, attr));
  #   endif
    }