Module: SocketProxy::Dump

Defined in:
lib/socket_proxy.rb

Class Method Summary collapse

Class Method Details

.hexdump(str) ⇒ Object

Written by Arai-san and published at [ruby-list:31987]. blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-list/31987



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# File 'lib/socket_proxy.rb', line 15

def hexdump(str)
  offset = 0
  result = []
  while raw = str.slice(offset, 16) and raw.length > 0
    # data field
    data = ''
    for v in raw.unpack('N* a*')
      if v.kind_of? Integer
        data << sprintf("%08x ", v)
      else
        v.each_byte {|c| data << sprintf("%02x", c) }
      end
    end
    # text field
    text = raw.tr("\000-\037\177-\377", ".")
    result << sprintf("%08x  %-36s  %s", offset, data, text)
    offset += 16
    # omit duplicate line
    if /^(#{ Regexp.quote(raw) })+/n =~ str[offset .. -1]
      result << sprintf("%08x  ...", offset)
      offset += $&.length
      # should print at the end
      if offset == str.length
        result << sprintf("%08x  %-36s  %s", offset-16, data, text)
      end
    end
  end
  result
end