Module: Hex

Defined in:
lib/epitools/hexdump.rb

Constant Summary collapse

ASCII_PRINTABLE =
(33..126)
DUMP_COLORS =
Rash.new(
  /\d/     => 13,
  /\w/     => 3,
  nil      => 9,
  :default => 7
)

Class Method Summary collapse

Class Method Details

.dump(data, options = {}) ⇒ Object


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# File 'lib/epitools/hexdump.rb', line 29

def self.dump(data, options={})
  base_offset   = options[:base_offset] || 0
  color         = options[:color].nil? ? true : options[:color]
  highlight     = options[:highlight]

  # p options
  # p color

  lines               = data.scan(/.{1,16}/m)
  max_offset          = (base_offset + data.size) / 16 * 16
  max_offset_width    = max_offset.to_s.size
  max_hex_width       = 3 * 16 + 1

  # p [max_offset, max_offset_width]
  lines.each_with_index do |line,n|
    offset    = base_offset + n*16
    bytes     = line.unpack("C*")
    hex       = bytes.map { |c| "%0.2x" % c }.insert(8, '').join(' ')

    plain = bytes.map do |c|
      if ASCII_PRINTABLE.include?(c)
        c = c.chr
      else
        color ? '<9>.</9>' : '.'
      end
    end.join('')

    puts "<11>#{offset.to_s.ljust(max_offset_width)}<3>:  <14>#{hex.ljust(max_hex_width)} <8>|<15>#{plain}<8>|".colorize(:strip => !color)
  end
end