可読性の低いC言語で書かれたHelloWorldを出力する可読性の低いRubyツール

mk-c-helloworld.rb

require 'erb'
INT_SIZE = 4

str = ARGV[0].chomp
chars = str.chars

i = 0
chars16 = []
((chars.size / INT_SIZE)+1).times do |i|
  chars16[i] = []
  INT_SIZE.times { chars16[i] << "%02x" % (chars.shift || "\0" ).ord  }
end

strs = chars16.map(&:reverse).map(&:join)

erb_str = <<EOF
#include <stdio.h>

int main(void)
{
  int c[<%= strs.size %>];
  char* ptc = &c;
  
  <% strs.each_with_index { |s,i|%>
  c[<%= i %>] = 0x<%= s %>;<% } %>
  
  printf("%s\\n",ptc);
  return 0;
}
EOF

puts ERB.new(erb_str).result(binding)