(once-only ((len `(read-var-integer ,vec ,index)))
(once-only ((res `(make-string ,len)))
`(progn
- (%byte-blt ,vec ,index ,res 0 ,len)
+ (loop for i from 0 below ,len
+ do (setf (aref ,res i)
+ (code-char (aref ,vec (+ ,index i)))))
(incf ,index ,len)
,res))))