Module: Chef::Mixin::WideString

Instance Method Summary collapse

Instance Method Details

#utf8_to_wide(ustring) ⇒ Object


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# File 'lib/chef/mixin/wide_string.rb', line 31

def utf8_to_wide(ustring)
  # ensure it is actually UTF-8
  # Ruby likes to mark binary data as ASCII-8BIT
  ustring = (ustring + "").force_encoding("UTF-8") if ustring.respond_to?(:force_encoding) && ustring.encoding.name != "UTF-8"

  # ensure we have the double-null termination Windows Wide likes
  ustring += "\000\000" if ustring.length == 0 || ustring[-1].chr != "\000"

  # encode it all as UTF-16LE AKA Windows Wide Character AKA Windows Unicode
  ustring = begin
    if ustring.respond_to?(:encode)
      ustring.encode("UTF-16LE")
    else
      require "iconv"
      Iconv.conv("UTF-16LE", "UTF-8", ustring)
    end
  end
  ustring
end

#wide_to_utf8(wstring) ⇒ Object


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# File 'lib/chef/mixin/wide_string.rb', line 51

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") if wstring.respond_to?(:force_encoding)

  # encode it all as UTF-8
  wstring = begin
    if wstring.respond_to?(:encode)
      wstring.encode("UTF-8")
    else
      require "iconv"
      Iconv.conv("UTF-8", "UTF-16LE", wstring)
    end
  end
  # remove trailing CRLF and NULL characters
  wstring.strip!
  wstring
end

#wstring(str) ⇒ Object


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# File 'lib/chef/mixin/wide_string.rb', line 23

def wstring(str)
  if str.nil? || str.encoding == Encoding::UTF_16LE
    str
  else
    utf8_to_wide(str)
  end
end