-(deftype-method translate-to-alien vector (type-spec vector &optional weak-ref)
- (declare (ignore weak-ref))
- (destructuring-bind (element-type &optional (length '*))
- (cdr (type-expand-to 'vector type-spec))
- (let* ((element-size (size-of element-type))
- (size (cond
- ((not (eq length '*))
- (* element-size length))
- ((not (atomic-type-p element-type))
- `(* ,element-size (1+ (length vector))))
- (t
- `(* ,element-size (length vector))))))
-
- `(let ((vector ,vector))
- (let ((c-vector (allocate-memory ,size)))
- (dotimes (i ,(if (eq length '*) '(length vector) length))
- (setf
- (,(sap-ref-fname element-type) c-vector (* i ,element-size))
- ,(translate-to-alien element-type '(aref vector i))))
- ,(when (and
- (eq length '*)
- (not (atomic-type-p element-type)))
- `(setf
- (sap-ref-sap c-vector (* (length vector) ,element-size))
- *magic-end-of-array*))
- c-vector)))))
-
-(deftype-method translate-from-alien
- vector (type-spec c-array &optional weak-ref)
- (destructuring-bind (element-type &optional (length '*))
- (cdr (type-expand-to 'vector type-spec))
- (when (eq length '*)
- (error "Can't use vectors of variable length as return type"))
- (let ((element-size (size-of element-type)))
- `(let ((c-array ,c-array)
- (vector (make-array ,length :element-type ',element-type)))
- (dotimes (i ,length)
- (setf
- (aref vector i)
- ,(translate-to-alien
- element-type
- `(,(sap-ref-fname element-type) c-array (* i ,element-size))
- weak-ref)))
- ,(unless weak-ref
- '(deallocate-memory c-vector))
- vector))))
-
-
-(deftype-method cleanup-alien vector (type-spec c-vector &optional weak-ref)
- (when weak-ref
- (unreference-alien type-spec c-vector)))
-
-(deftype-method unreference-alien vector (type-spec c-vector)
- (destructuring-bind (element-type &optional (length '*))
- (cdr (type-expand-to 'vector type-spec))
- `(let ((c-vector ,c-vector))
- (unless (null-pointer-p c-vector)
- ,(unless (atomic-type-p element-type)
- (let ((element-size (size-of element-type)))
- (if (not (eq length '*))
- `(dotimes (i ,length)
- (unreference-alien
- element-type (sap-ref-sap c-vector (* i ,element-size))))
- `(do ((offset 0 (+ offset ,element-size))
- ((sap=
- (sap-ref-sap c-vector offset)
- *magic-end-of-array*)))
- ,(unreference-alien
- element-type '(sap-ref-sap c-vector offset))))))
- (deallocate-memory c-vector)))))
-
-
-(defun map-c-array (seqtype function location element-type length)
- (let ((reader (intern-reader-function element-type))
- (size (size-of element-type)))
+(defun make-c-vector (type length &optional content location)
+ (let* ((size-of-type (size-of type))
+ (location (or location (allocate-memory (* size-of-type length))))
+ (writer (writer-function type)))
+ (loop
+ for element across content
+ for i from 0 below length
+ as offset = 0 then (+ offset size-of-type)
+ do (funcall writer element location offset))
+ location))
+
+
+(defun map-c-vector (seqtype function location element-type length)
+ (let ((reader (reader-function element-type))
+ (size-of-element (size-of element-type)))