MathGroup Archive 2003

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two's complement function

Can anyone think of a better way to produce a list of digits of a two's
complement integer than the following?

tc[n_, bits_:32] :=
If[Positive[n], IntegerDigits[n, 2, bits],
IntegerDigits[FromDigits[IntegerDigits[n, 2, bits] /. {1 -> 0, 0 -> 1}, 2] +
1, 2, bits]]


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