From: Kevin M. Rosenberg <kevin@rosenberg.net>
Date: Thu, 7 Oct 2004 18:36:28 +0000 (+0000)
Subject: r10087: add convert-from-foreign-usb8
X-Git-Tag: v1.6.1~85
X-Git-Url: http://git.kpe.io/?p=uffi.git;a=commitdiff_plain;h=d0a074275862d6458963f9ad4a835cb03e50ebbf

r10087: add convert-from-foreign-usb8
---

diff --git a/ChangeLog b/ChangeLog
index 4c0ea2e..ba64d06 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2004-10-07 Kevin Rosenberg (kevin@rosenberg.net)
+	* src/objects.lisp: Add new function:
+	convert-from-foreign-usb8
+	
 2004-04-15 Kevin Rosenberg (kevin@rosenberg.net)
 	* src/objects.lisp: Add new functions:
 	MAKE-POINTER and POINTER-ADDRESS
diff --git a/src/objects.lisp b/src/objects.lisp
index 358763e..0e2d908 100644
--- 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)))
+
diff --git a/src/package.lisp b/src/package.lisp
index 3c22730..e25c9ce 100644
--- a/src/package.lisp
+++ b/src/package.lisp
@@ -54,6 +54,7 @@
    #:char-array-to-pointer
    #:with-cast-pointer
    #:def-foreign-var
+   #:convert-from-foreign-usb8
    
    ;; string functions
    #:convert-from-cstring