From: Zangief Ief <z4n9ief@...>
Date: 2009-07-10T05:18:28+09:00
Subject: unpack("N*")

Hi,

I'm trying to unpack a string into network byte order (big-endian), such
as the following method:

# Convert an 8-bit or 16-bit string to an array of big-endian words
# In 8-bit function, characters >255 have their hi-byte silently
ignored.
def str2binb(str)
  bin = []
  mask = (1 << 8) - 1
  i = 0
  while (i < str.length * 8)
    bin[i>>5] ||= 0
    bin[i>>5] |= (str[i / 8] & mask) << (32 - 8 - i%32)
    i += 8
  end
  bin
end

But after using unpack("N*") method (according to
http://www.ruby-doc.org/core/classes/String.html#M000760), the result is
not exactly the same.  For instance:

>> str2binb("Abcdefghijklmnopqrstuvwxyz")
=> [1096967012, 1701209960, 1768581996, 1835954032, 1903326068,
1970698104, 2038038528]
>> "Abcdefghijklmnopqrstuvwxyz".unpack("N*")
=> [1096967012, 1701209960, 1768581996, 1835954032, 1903326068,
1970698104]

Moreover, if I try "a".unpack("N*"), Ruby returns a void array...

Thanks for any suggestions.
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