class PDF::Reader::Encoding::MacRomanEncoding

def to_utf8(str, tounicode = nil)
  # content of this method borrowed from REXML::Encoding.decode_cp1252
  array_mac = str.unpack('C*')
  array_mac = self.process_differences(array_mac)
  array_enc = []
  array_mac.each do |num|
    case num
      # change necesary characters to equivilant Unicode codepoints
    when 0x80; array_enc << 0x00C4
    when 0x81; array_enc << 0x00C5
    when 0x82; array_enc << 0x00C7
    when 0x83; array_enc << 0x00C9
    when 0x84; array_enc << 0x00D1
    when 0x85; array_enc << 0x00D6
    when 0x86; array_enc << 0x00DC
    when 0x87; array_enc << 0x00E1
    when 0x88; array_enc << 0x00E0
    when 0x89; array_enc << 0x00E2
    when 0x8A; array_enc << 0x00E4
    when 0x8B; array_enc << 0x00E3
    when 0x8C; array_enc << 0x00E5
    when 0x8D; array_enc << 0x00E7
    when 0x8E; array_enc << 0x00E9
    when 0x8F; array_enc << 0x00E8
    when 0x90; array_enc << 0x00EA
    when 0x91; array_enc << 0x00EB
    when 0x92; array_enc << 0x00ED
    when 0x93; array_enc << 0x00EC
    when 0x94; array_enc << 0x00EE
    when 0x95; array_enc << 0x00EF
    when 0x96; array_enc << 0x00F1
    when 0x97; array_enc << 0x00F3
    when 0x98; array_enc << 0x00F2
    when 0x99; array_enc << 0x00F4
    when 0x9A; array_enc << 0x00F6
    when 0x9B; array_enc << 0x00F5
    when 0x9C; array_enc << 0x00FA
    when 0x9D; array_enc << 0x00F9
    when 0x9E; array_enc << 0x00FB
    when 0x9F; array_enc << 0x00FC
    when 0xA0; array_enc << 0x2020
    when 0xA1; array_enc << 0x00B0
    when 0xA2; array_enc << 0x00A2
    when 0xA3; array_enc << 0x00A3
    when 0xA4; array_enc << 0x00A7
    when 0xA5; array_enc << 0x2022
    when 0xA6; array_enc << 0x00B6
    when 0xA7; array_enc << 0x00DF
    when 0xA8; array_enc << 0x00AE
    when 0xA9; array_enc << 0x00A9
    when 0xAA; array_enc << 0x2122
    when 0xAB; array_enc << 0x00B4
    when 0xAC; array_enc << 0x00A8
    when 0xAD; array_enc << 0x2260
    when 0xAE; array_enc << 0x00C6
    when 0xAF; array_enc << 0x00D8
    when 0xB0; array_enc << 0x221E
    when 0xB1; array_enc << 0x00B1
    when 0xB2; array_enc << 0x2264
    when 0xB3; array_enc << 0x2265
    when 0xB4; array_enc << 0x00A5
    when 0xB5; array_enc << 0x00B5
    when 0xB6; array_enc << 0x2202
    when 0xB7; array_enc << 0x2211
    when 0xB8; array_enc << 0x220F
    when 0xB9; array_enc << 0x03C0
    when 0xBA; array_enc << 0x222B
    when 0xBB; array_enc << 0x00AA
    when 0xBC; array_enc << 0x00BA
    when 0xBD; array_enc << 0x03A9
    when 0xBE; array_enc << 0x00E6
    when 0xBF; array_enc << 0x00F8
    when 0xC0; array_enc << 0x00BF
    when 0xC1; array_enc << 0x00A1
    when 0xC2; array_enc << 0x00AC
    when 0xC3; array_enc << 0x221A
    when 0xC4; array_enc << 0x0192
    when 0xC5; array_enc << 0x2248
    when 0xC6; array_enc << 0x2206
    when 0xC7; array_enc << 0x00AB
    when 0xC8; array_enc << 0x00BB
    when 0xC9; array_enc << 0x2026
    when 0xCA; array_enc << 0x00A0
    when 0xCB; array_enc << 0x00C0
    when 0xCC; array_enc << 0x00C3
    when 0xCD; array_enc << 0x00D5
    when 0xCE; array_enc << 0x0152
    when 0xCF; array_enc << 0x0153
    when 0xD0; array_enc << 0x2013
    when 0xD1; array_enc << 0x2014
    when 0xD2; array_enc << 0x201C
    when 0xD3; array_enc << 0x201D
    when 0xD4; array_enc << 0x2018
    when 0xD5; array_enc << 0x2019
    when 0xD6; array_enc << 0x00F7
    when 0xD7; array_enc << 0x25CA
    when 0xD8; array_enc << 0x00FF
    when 0xD9; array_enc << 0x0178
    when 0xDA; array_enc << 0x2044
    when 0xDB; array_enc << 0x20AC
    when 0xDC; array_enc << 0x2039
    when 0xDD; array_enc << 0x203A
    when 0xDE; array_enc << 0xFB01
    when 0xDF; array_enc << 0xFB02
    when 0xE0; array_enc << 0x2021
    when 0xE1; array_enc << 0x00B7
    when 0xE2; array_enc << 0x201A
    when 0xE3; array_enc << 0x201E
    when 0xE4; array_enc << 0x2030
    when 0xE5; array_enc << 0x00C2
    when 0xE6; array_enc << 0x00CA
    when 0xE7; array_enc << 0x00C1
    when 0xE8; array_enc << 0x00CB
    when 0xE9; array_enc << 0x00C8
    when 0xEA; array_enc << 0x00CD
    when 0xEB; array_enc << 0x00CE
    when 0xEC; array_enc << 0x00CF
    when 0xED; array_enc << 0x00CC
    when 0xEE; array_enc << 0x00D3
    when 0xEF; array_enc << 0x00D4
    when 0xF0; array_enc << 0xF8FF
    when 0xF1; array_enc << 0x00D2
    when 0xF2; array_enc << 0x00DA
    when 0xF3; array_enc << 0x00D8
    when 0xF4; array_enc << 0x00D9
    when 0xF5; array_enc << 0x0131
    when 0xF6; array_enc << 0x02C6
    when 0xF7; array_enc << 0x02DC
    when 0xF8; array_enc << 0x00AF
    when 0xF9; array_enc << 0x02D8
    when 0xFA; array_enc << 0x02D9
    when 0xFB; array_enc << 0x02DA
    when 0xFC; array_enc << 0x00B8
    when 0xFD; array_enc << 0x02DD
    when 0xFE; array_enc << 0x02DB
    when 0xFF; array_enc << 0x02C7
    else
      array_enc << num
    end
  end
  # convert any glyph names to unicode codepoints
  array_enc = self.process_glyphnames(array_enc)
  # replace charcters that didn't convert to unicode nicely with something valid
  array_enc.collect! { |c| c ? c : PDF::Reader::Encoding::UNKNOWN_CHAR }
  
  # pack all our Unicode codepoints into a UTF-8 string
  ret = array_enc.pack("U*")
  # set the strings encoding correctly under ruby 1.9+
  ret.force_encoding("UTF-8") if ret.respond_to?(:force_encoding)
  return ret
end