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It was thus said that the Great Roberto Ierusalimschy once stated:
> All these options may result in sub-optimal code for some particular
> sizes of ptrdiff_t and int.
> Did you try this option?
>   #define twoto(x)      (int)(1<<(x))

  Night not it be better as:

#define twoto(x)	(1 << ((int)x))

  Get x as a int first, then shift?