bin2code.rb

#!/usr/bin/ruby

#
# Copyright 2013 Daniel Mack
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#

require 'optparse'

options = {}

optparse = OptionParser.new do |opts|
  opts.banner = "Usage: [options] input-files"
  options[:dec] = false
  options[:width] = 8
  options[:indent] = 2
  options[:static] = false

  opts.on('-d', '--dec', 'Use decimal output mode (default is hex)') do
    options[:dec] = true
  end

  opts.on('-s', '--static', 'Declare output array static') do
    options[:static] = true
  end

  opts.on('-w', '--width n', 'Number of output colums (defaults to 8)') do |width|
    options[:width] = width.to_i
  end

  opts.on('-i', '--indent n', 'Number of spaces for indent (defaults to 2)') do |indent|
    options[:indent] = indent.to_i
  end
end

optparse.parse!

indent = " " * options[:indent]

if options[:dec]
  fmt = "%d"
else
  fmt = "0x%02x"
end

if options[:static]
  prefix = "static "
else
  prefix = ""
end

ARGV.each do |filename|
  content = IO.binread(filename)
  offset = 0

  name = filename.gsub(/[^a-zA-Z0-9]/, '_')

  printf "#{prefix}unsigned char #{name}[] = {\n"
  printf indent

  while offset < content.length
    printf "#{fmt}, ", content[offset].ord
    offset += 1

    if offset % options[:width] == 0
      print "\n" + indent
    end
  end

  print "\n};\n\n"
end