Class: FFI::Pointer

Inherits:
Object
  • Object
show all
Defined in:
lib/facter/resolvers/windows/ffi/ffi.rb

Instance Method Summary collapse

Instance Method Details

#read_wide_string_with_length(char_length) ⇒ Object 



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# File 'lib/facter/resolvers/windows/ffi/ffi.rb', line 30

def read_wide_string_with_length(char_length)
  # char_length is number of wide chars (typically excluding NULLs), *not* bytes
  str = get_bytes(0, char_length * 2).force_encoding(Encoding::UTF_16LE)
  str.encode(Encoding::UTF_8, str.encoding)
end

#read_wide_string_without_length(replace_invalid_chars: false) ⇒ Object 



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# File 'lib/facter/resolvers/windows/ffi/ffi.rb', line 36

def read_wide_string_without_length(replace_invalid_chars: false)
  wide_character = get_bytes(0, 2)
  wide_character.force_encoding(Encoding::UTF_16LE)
  i = 2
  str = []

  while wide_character != END_OF_WCHAR_STRING
    str << wide_character
    wide_character = get_bytes(i, 2)
    wide_character.force_encoding(Encoding::UTF_16LE)
    i += 2
  end

  if replace_invalid_chars
    str.join.force_encoding(Encoding::UTF_16LE).encode(Encoding::UTF_8, Encoding::UTF_16LE, invalid: :replace)
  else
    str.join.force_encoding(Encoding::UTF_16LE).encode(Encoding::UTF_8)
  end
end

#read_win32_bool ⇒ Object 



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# File 'lib/facter/resolvers/windows/ffi/ffi.rb', line 56

def read_win32_bool
  # BOOL is always a 32-bit integer in Win32
  # some Win32 APIs return 1 for true, while others are non-0
  read_int32 != WIN32FALSE
end