r10087: add convert-from-foreign-usb8

[uffi.git] / src / objects.lisp

diff --git a/src/objects.lisp b/src/objects.lisp
index 358763e41fc829c815845886a3e898dcf31bd733..0e2d908f45fe9edea2b6709e2f4ed28a1a455c02 100644 (file)
--- a/src/objects.lisp
+++ b/src/objects.lisp
@@ -270,3 +270,37 @@ an array of TYPE with size SIZE. The TYPE parameter is evaluated."
     `(define-symbol-macro ,lisp-name
       '(error "DEF-FOREIGN-VAR not (yet) defined for ~A"
         (lisp-implementation-type)))))
+
+#-(or sbcl cmu)
+(defun convert-from-foreign-usb8 (s len)
+  (declare (optimize (speed 3) (space 0) (safety 0) (compilation-speed 0))
+          (fixnum len))
+  (let ((a (make-array len :element-type '(unsigned-byte 8))))
+    (dotimes (i len a)
+      (declare (fixnum i))
+      (setf (aref a i) (uffi:deref-array s '(:array :unsigned-byte) i)))))
+
+#+sbcl
+(defun convert-from-foreign-usb8 (s len)
+  (declare (type sb-sys:system-area-pointer sap))
+  (locally
+      (declare (optimize (speed 3) (safety 0)))
+    (let ((result (make-array len :element-type '(unsiged-byte 8))))
+      (sb-kernel:copy-from-system-area s 0
+                                      result (* sb-vm:vector-data-offset
+                                                sb-vm:n-word-bits)
+                                      (* len sb-vm:n-byte-bits))
+      result)))
+
+#+cmu
+(defun convert-from-foreign-usb8 (s le)
+  (declare (type system:system-area-pointer sap))
+  (locally
+      (declare (optimize (speed 3) (safety 0)))
+    (let ((result (make-array len :element-type '(unsiged-byte 8))))
+      (kernel:copy-from-system-area s 0
+                                   result (* vm:vector-data-offset
+                                             vm:word-bits)
+                                   (* len vm:byte-bits))
+      result)))
+