The function pack need to initail the elements of teh variable result to 0 #6
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a :reader, a :writer and a :size (or any combination of them). For
example:
;; Just a reader and a size for this unsigned integer
(define-binary-type unsigned-integer (bytes bits-per-byte)
(:reader (in)
(loop with value = 0
for low-bit downfrom (* bits-per-byte (1- bytes)) to 0 by bits-per-byte do
(setf (ldb (byte bits-per-byte low-bit) value) (read-byte in))
finally (return value)))
(:size () bytes))
A not present :reader, :writer or :size will error out at call time.
one can obtain the byte size of a binary class object.
…rs (intel is my master).
…rs (intel is my master).
size of a read-byte. start to optimize a bit.
…ll be of interest on vectors
and now io stream should be of type '(unsigned-byte 8) for most data-type.
[read|write]-value-at interface instead.
Add support for variable length string in `binary-io.common-datatypes:8bit-string'.
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[edit: that ended in the wrong place apparently. It was supposed to be about mgi/binary-io ]
Inside the function pack the variable result is currently bound to (make-array m), which create a simple-vector with NILs. then the call to ldb gets NIL as third argument and errors. That happens when running the tests.
It needs to be initialized with Zeroes, by being bound to (make-array m :initial-element 0).
I am not actually pulling the code, I am just raising an issue. I do it in a pull request because I didn't find the issues for this project.