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January 2010

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[flexi-streams-devel] Flexi-streams problem with SBCL 1.0.34
by Fred Gibson 07 Jan '10

07 Jan '10

I found a problem with the flexi-streams:string-to-octets function. I was getting the following back-trace when using it: (ironclad:make-hmac (string-octets key) :sha1) from zs3:make-digester gives: The value #(55 98 50 52 104 75 97 65 50 54 ...) is not of type (SIMPLE-ARRAY (UNSIGNED-BYTE 8) (*)). [Condition of type TYPE-ERROR] Restarts: 0: [DEFAULT-DEBUGGER] Use default debugger. 1: [ABORT] Return to SLIME's top level. 2: [TERMINATE-THREAD] Terminate this thread (#<THREAD "repl-thread" RUNNING {ACA40D1}>) Backtrace: 0: ((SB-PCL::FAST-METHOD SHARED-INITIALIZE :AFTER (IRONCLAD::HMAC T)) #<unavailable argument> #<unavail.. Locals: SB-DEBUG::ARG-0 = 10 SB-DEBUG::ARG-1 = :<NOT-AVAILABLE> SB-DEBUG::ARG-2 = :<NOT-AVAILABLE> SB-DEBUG::ARG-3 = #<HMAC(SHA1) {F0DD561}> SB-DEBUG::ARG-4 = :<NOT-AVAILABLE> 1: ((LAMBDA (SB-PCL::|.P0.| SB-PCL::|.P1.| SB-PCL::|.P2.|)) #<unavailable argument> #<unavailable argum.. Locals: SB-DEBUG::ARG-0 = :<NOT-AVAILABLE> SB-DEBUG::ARG-1 = :<NOT-AVAILABLE> SB-DEBUG::ARG-2 = :<NOT-AVAILABLE> zs3's string-octets uses flexi-streams:string-to-octets The workaround I'm using for now is instead going to acl-compat's string-to-octets function from acl-excl.lisp: (defun string-to-octets (string &key (null-terminate t) (start 0) end mb-vector make-mb-vector? (external-format :default)) "This function returns a lisp-usb8-vector and the number of bytes copied." (declare (ignore external-format)) ;; The end parameter is different in ACL's lambda list, but this ;; variant lets us give an argument :end nil explicitly, and the ;; right thing will happen (unless end (setf end (length string))) (let* ((number-of-octets (if null-terminate (1+ (- end start)) (- end start))) (mb-vector (cond ((and mb-vector (>= (length mb-vector) number-of-octets)) mb-vector) ((or (not mb-vector) make-mb-vector?) (make-array (list number-of-octets) :element-type '(unsigned-byte 8) :initial-element 0)) (t (error "Was given a vector of length ~A, ~ but needed at least length ~A." (length mb-vector) number-of-octets))))) (declare (type (simple-array (unsigned-byte 8) (*)) mb-vector)) (loop for from-index from start below end for to-index upfrom 0 do (progn (setf (aref mb-vector to-index) (char-code (aref string from-index))))) (when null-terminate (setf (aref mb-vector (1- number-of-octets)) 0)) (values mb-vector number-of-octets))) which seems to work fine. My best, Fred Gibson Founder / Software Developer http://www.streamfocus.com (c)2010 Organon Technologies LLC

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