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@(do
(defun stream-positioned-to-right-place (name)
(let* ((stream (open-file name "r+b"))
(pre (read-until-match #/@\(txr\)/ stream t)))
(when (or (empty pre) (not (search-str pre "@(txr)")))
(throwf 'error "~a isn't a TXR executable" name))
stream)))
@(next :args)
@(cases)
-w
@string
@file
@ (eof)
@ (do
(let ((f (stream-positioned-to-right-place file)))
(with-in-string-byte-stream (s string)
(mapdo (op put-byte @1 f)
(take 127 (pad (gun (get-byte s)) 0)))
(put-byte 0 f))))
@(or)
@file
@ (eof)
@ (do
(let ((f (stream-positioned-to-right-place file)))
(let ((arg-str (with-out-string-stream (u8)
(mapdo (op put-byte @1 u8)
(take 127 (gun (get-byte f)))))))
(put-line arg-str))))
@(or)
@ (output)
usage: @{self-path} [-w string] txr-executable
@ (end)
@ (do (exit 1))
@(end)
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