module HexDump
This was written by Arai-san and published at blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-list/31987
Public Class Methods
encode(str)
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str must be in BINARY encoding in 1.9
# File lib/hexdump.rb, line 8 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)
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raw must be in BINARY encoding in 1.9
# File lib/hexdump.rb, line 41 def self.regex_quote_n(raw) Regexp.quote(raw) end
Private Instance Methods
encode(str)
click to toggle source
str must be in BINARY encoding in 1.9
# File lib/hexdump.rb, line 8 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