Class: FFI::Pointer

Inherits:
Object
  • Object
show all
Defined in:
lib/win32/taskscheduler/sid.rb

Instance Method Summary collapse

Instance Method Details

#read_wstring(num_wchars = nil) ⇒ Object 



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# File 'lib/win32/taskscheduler/sid.rb', line 5

def read_wstring(num_wchars = nil)
  if num_wchars.nil?
    # Find the length of the string
    length = 0
    last_char = nil
    while last_char != "\000\000"
      length += 1
      last_char = get_bytes(0, length * 2)[-2..-1]
    end

    num_wchars = length
  end

  wide_to_utf8(get_bytes(0, num_wchars * 2))
end

#wide_to_utf8(wstring) ⇒ Object 



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# File 'lib/win32/taskscheduler/sid.rb', line 21

def wide_to_utf8(wstring)
  # ensure it is actually UTF-16LE
  # Ruby likes to mark binary data as ASCII-8BIT
  wstring = wstring.force_encoding("UTF-16LE")

  # encode it all as UTF-8 and remove trailing CRLF and NULL characters
  wstring.encode("UTF-8").strip
end