Also, a number->u8vector function would be nice. Converting a number to a hex
string, then taking every 2 characters of that and converting that back to a
number, for each element of the u8vector, just to keep me from accessing the
number's bytes directly, just strikes me as terribly roundabout.
(define (number->u8vector num)
(let ((s (number->string num #x10)))
(let ((v (make-u8vector (/ (string-length s) 2))))
(let loop ((s s) (i 0))
(when (< i (u8vector-length v))
(u8vector-set! v i (string->number (substring s 0 2) #x10))
(loop (substring s 2) (+ i 1))))
v)))
vs
(define (numbers->u8vector num)
(blob->u8vector (somehow-cast-to-blob (subvector (somehow-cast-to-vector num)
1))))
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