Convert between plain text JavaScript and C char array

js2c.rb

# coding: utf-8
# blog post: http://blog.slashpoundbang.com/post/2488598258/running-javascript-from-the-command-line-with-v8

abort "usage: #{$0} filename.h\n       #{$0} filename.js prefix" unless ARGV[0]
abort "ERROR: Couldn't open '#{ARGV[0]}' for reading" unless File.exist?(ARGV[0])
abort "ERROR: Prefix is required if input is JavaScript" if ARGV[0][/js$/] && !ARGV[1]

if ARGV[0][/js$/]
  puts "const char #{ARGV[1]}_code[] = {\n    #{File.read(ARGV[0]).unpack('U*').map{|i| i == 8212 ? [226, 128, 148] : i }.flatten.each_slice(16).map{ |a| a.map{ |i| "0x%02x" % i }.join(',') }.join(",\n    ") },0x00\n};"
else
  puts File.read(ARGV[0])[/(0x.+),0x00/m, 1].split(',').reduce('') { |string,x| string += x.hex.chr }
end