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Groups > comp.lang.ruby > #2440

Re: Packing and unpacking unsigned integers of arbitrary size as binary strings

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Aaron D. Gifford wrote in post #991376:
> Are there alternatives that may be more efficient, or if I've missed
> something obvious.

I'd just do this:

>> num = 12345678901234567890
=> 12345678901234567890
>> hex = num.to_s(16)
=> "ab54a98ceb1f0ad2"
>> hex.size
=> 16
>> [hex].pack("H*")
=> "\253T\251\214\353\037\n\322"

Add an extra '0' to the left of hex if it's an odd number of characters.

-- 
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Packing and unpacking unsigned integers of arbitrary size as binary strings "Aaron D. Gifford" <astounding@gmail.com> - 2011-04-06 23:56 -0500
  Re: Packing and unpacking unsigned integers of arbitrary size as binary strings Brian Candler <b.candler@pobox.com> - 2011-04-07 04:41 -0500
    Re: Packing and unpacking unsigned integers of arbitrary size as binary strings Brian Candler <b.candler@pobox.com> - 2011-04-07 04:43 -0500
      Re: Packing and unpacking unsigned integers of arbitrary size as binary strings "Aaron D. Gifford" <astounding@gmail.com> - 2011-04-07 11:30 -0500

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