r10140: add sb-unicode patch

diff --git a/src/strings.lisp b/src/strings.lisp
index c63d943e2c8e3496fb89056de87df03bb722bab1..b8965b151068cbcee667cb54060abe1648431205 100644 (file)
--- a/src/strings.lisp
+++ b/src/strings.lisp
@@ -299,7 +299,7 @@ that LW/CMU automatically converts strings from c-calls."
        (setf (char result i) (code-char (system:sap-ref-8 sap i))))
       result)))
 
-#+sbcl
+#+(and sbcl (not sb-unicode))
 (defun sbcl-naturalize-cstring (sap &key length (null-terminated-p t))
   (declare (type sb-sys:system-area-pointer sap))
   (locally
@@ -322,6 +322,27 @@ that LW/CMU automatically converts strings from c-calls."
                                    (* length sb-vm:n-byte-bits))
       result)))
 
+#+(and sbcl sb-unicode)
+(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)))
+      (cond
+        (null-terminated-p
+        (let ((casted (sb-alien:cast
+                       (sb-alien:sap-alien sap (* char)) sb-alien:c-string)))
+          (if length
+              (copy-seq (subseq casted 0 length))
+              (copy-seq casted))))
+        (t
+         (let ((result (make-string length)))
+          ;; this will not work in sb-unicode
+           (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)))))
+
 (eval-when (:compile-toplevel :load-toplevel :execute)
    (def-function "strlen"
      ((str (* :unsigned-char)))