Module: HexDump

Defined in:
lib/hexdump.rb

Class Method Summary collapse

Class Method Details

.encode(str) ⇒ Object

str must be in BINARY encoding in 1.9


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# File 'lib/hexdump.rb', line 9

def encode(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 /^(#{regex_quote_n(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

.regex_quote_n(raw) ⇒ Object

raw must be in BINARY encoding in 1.9


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# File 'lib/hexdump.rb', line 42

def self.regex_quote_n(raw)
  Regexp.quote(raw)
end