Microsoft.Scripting.Math.BigInteger.makeTwosComplement C# (CSharp) Method

    private static uint[] makeTwosComplement(uint[] d) {
      // first do complement and +1 as long as carry is needed
      int i = 0;
      uint v = 0;
      for (; i < d.Length; i++) {
        v = ~d[i] + 1;
        d[i] = v;
        if (v != 0) { i++; break; }
      }

      if (v != 0) {
        // now ones complement is sufficient
        for (; i < d.Length; i++) {
          d[i] = ~d[i];
        }
      } else {
        //??? this is weird
        d = resize(d, d.Length + 1);
        d[d.Length - 1] = 1;
      }
      return d;
    }