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extern char _dig_vec_upper[];
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extern char _dig_vec_lower[];
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#define set_if_bigger(a,b) do { if ((a) < (b)) (a)=(b); } while(0)
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#define set_if_smaller(a,b) do { if ((a) > (b)) (a)=(b); } while(0)
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#define array_elements(A) ((size_t) (sizeof(A)/sizeof(A[0])))
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/* Some types that is different between systems */