+
+#+scl
+;; kernel:copy-from-system-area doesn't work like it does on CMUCL or SBCL,
+;; so have to iteratively copy from sap
+(defun cmucl-naturalize-cstring (sap &key length (null-terminated-p t))
+ (declare (type system:system-area-pointer sap))
+ (locally
+ (declare (optimize (speed 3) (safety 0)))
+ (let ((null-terminated-length
+ (when null-terminated-p
+ (loop
+ for offset of-type fixnum upfrom 0
+ until (zerop (system:sap-ref-8 sap offset))
+ finally (return offset)))))
+ (if length
+ (if (and null-terminated-length
+ (> (the fixnum length) (the fixnum null-terminated-length)))
+ (setq length null-terminated-length))
+ (setq length null-terminated-length)))
+ (let ((result (make-string length)))
+ (dotimes (i length)
+ (declare (type fixnum i))
+ (setf (char result i) (code-char (system:sap-ref-8 sap i))))
+ result)))
+
+#+sbcl
+(defun sbcl-naturalize-cstring (sap &key length (null-terminated-p t))
+ (declare (type sb-sys:system-area-pointer sap))
+ (locally
+ (declare (optimize (speed 3) (safety 0)))
+ (let ((null-terminated-length
+ (when null-terminated-p
+ (loop
+ for offset of-type fixnum upfrom 0
+ until (zerop (sb-sys:sap-ref-8 sap offset))
+ finally (return offset)))))
+ (if length
+ (if (and null-terminated-length
+ (> (the fixnum length) (the fixnum null-terminated-length)))
+ (setq length null-terminated-length))
+ (setq length null-terminated-length)))
+ (let ((result (make-string length)))
+ (sb-kernel:copy-from-system-area sap 0
+ result (* sb-vm:vector-data-offset
+ sb-vm:n-word-bits)
+ (* length sb-vm:n-byte-bits))
+ result)))