[Common Lisp] How do I read a 32-bit integer from a binary (file) stream?
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[Common Lisp] How do I read a 32-bit integer from a binary (file) stream?
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I can’t figure out how to read multiple bytes. I’m trying to read a 32-bit integer so that I can store it to be used by a class.

My (truncated) code:

(let ((version-buffer (byte 4 0)))
 (read-sequence version-buffer input-stream)
  (cond
    ((> version-buffer 10) (read-sequence minor-version-buffer input-stream)) (t t))
      (setf (navigation-mesh-version temp-mesh) `(,(version-buffer)) )
      )

EDIT: Truncated the code further.

@thann@heapoverflow.ml
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2•1M

I think if you trimmed the problem down to a couple of lines you’d get a better response =/

Amicese
creator
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2•1M

Good point. I should probably trim it.

Amicese
creator
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1M

I managed to find a solution!

EDIT: (use setf instead of dpb, because dpb didn’t work for some reason.)

(let ((version 0))
  (dotimes (i 4 #|<- Read 4 Bytes.|# version) (setf (ldb (byte 8 (* 8 i)) version) (read-byte input-stream))))
  )
``

~~That code was less complicated than I thought it would be...~~
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