binary file to ruby script file

compress.rb

# usage: ruby compress.rb icon.gif > myicon.rb

bit = 15

data = File.open(ARGV[0]){|f| f.read }

encoded_data = nil
offset = 0
bit_str = data.unpack("B*")[0]
(0x0000..0xffff).each do |i|
  chars = bit_str.split(//).each_slice(bit).map(&:join).map{|s|[s.to_i(2)+i].pack("U")}
  if chars.all?{|c|c.inspect.length==3}
    encoded_data = chars.join
    offset = i
    $stderr.puts "length: #{chars.length}"
    $stderr.puts "offset: #{"%#4x"%[offset]}"
    break
  end
end
if !encoded_data
  $stderr.puts "offset not found"
  exit 1
end


script = ""
script << "print [\'"
script << encoded_data
script << "\'.unpack('U*').map{|n|'%#{bit}b'%[n-#{offset}]}.join].pack('B*')"
$stderr.puts "script length: #{script.length}"
print script

compress_2.rb

# usage: ruby compress.rb icon.gif > myicon.rb

data = File.open(ARGV[0]){|f| f.read }

chunk_length = nil
encoded_data = nil
offset = 0
bit_str = data.unpack("B*")[0]

(12..16).to_a.reverse.each do |bit|

  (0x0026..0xffff).each do |i|
    chars = bit_str.split(//).each_slice(bit).map(&:join).map{|s|[s.to_i(2)+i].pack("U")}
    if chars.all?{|c|c.inspect.length==3 && c != '`'}
      encoded_data = chars.join
      offset = i
      chunk_length = bit
      $stderr.puts "chunk : #{bit}"
      $stderr.puts "length: #{chars.length}"
      $stderr.puts "offset: #{"%#4x"%[offset]}"
      break
    end
  end
  break if offset > 0
end

if offset == 0
  $stderr.puts "offset not found"
  exit 1
end

script = ""
script << "print [\'"
script << encoded_data
if chunk_length == 16
  script << ".unpack('U*').map{|n|n-#{offset}}.pack('n*')"
else
  script << "\'.unpack('U*').map{|n|'%#{bit}b'%[n-#{offset}]}.join].pack('B*')"
end
$stderr.puts "script length: #{script.length}"
print script
puts

myicon.rb

print ['☸吢ী᎔ٜ̔ʔʔˇ塨ᴿ⣳䦠䊋ဟ芓舔ʔʔʖቜኘʔʔᢔʔʖʕʔʡ⣥ⵤ膤Μ䗂䟚㘢滝㠔忘❒ୀठ橌叅↥儇䧔㭣焲罛塿ν♦ᠡ⏡厭伱篼වԸഥ⫨礊చⱅ悆ᙅے〈ⷕ滀䲗禥拔ˏ'.unpack('U*').map{|n|'%15b'%[n-660]}.join].pack('B*')

myicon16.rb

print '䝮䙝㦆ဥဥ%%杼僺媊句逢웪𐀤Ｅ%%F朗ĥ%Q%%ဥဥ(卍ꫵ﹅чᦙ咋爀ቿ삂䑮籇끙暠詋⟩杞읥燄몠廕╍웆䷇㍗矰䃗쁹苉呏皛ጱꛫ㬵蟰崺ꄑⲹࠁ䜧`'.unpack('U*').map{|n|n-37}.pack('n*')