X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-c-call.lisp;h=32924533ca081208422c870d988bd4064a1fef9d;hb=22b819c0cd0ca0ea5be52ba280b9e9e0b8e86210;hp=4b70eafa6b3113b1e438600a9d967ceba239e406;hpb=9a241987c408980164f71237f7d840265302bbc1;p=sbcl.git

diff --git a/src/code/target-c-call.lisp b/src/code/target-c-call.lisp
index 4b70eaf..3292453 100644
--- a/src/code/target-c-call.lisp
+++ b/src/code/target-c-call.lisp
@@ -1,5 +1,10 @@
-;;;; This file contains some extensions to the Alien facility to
-;;;; simplify importing C interfaces.
+;;;; FIXME: This file and host-c-call.lisp are separate from the
+;;;; rest of the alien source code for historical reasons: CMU CL
+;;;; made a distinction between the stuff in the C-CALL package and
+;;;; stuff in the ALIEN package. There's no obvious boundary
+;;;; there, though, and SBCL doesn't try to make this distinction,
+;;;; so it might make sense to just merge these files in with the
+;;;; rest of the SB-ALIEN code.
 
 ;;;; This software is part of the SBCL system. See the README file for
 ;;;; more information.
@@ -10,7 +15,7 @@
 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
 ;;;; files for more information.
 
-(in-package "SB!C-CALL")
+(in-package "SB!ALIEN")
 
 ;;;; extra types
 
@@ -30,17 +35,16 @@
 (define-alien-type-translator void ()
   (parse-alien-type '(values) (sb!kernel:make-null-lexenv)))
 
-#+nil 
-(define-alien-routine strlen integer
-  (s (* char)))
-
 (defun %naturalize-c-string (sap)
   (declare (type system-area-pointer sap))
-  (with-alien ((ptr (* char) sap))
-    (let* ((length (alien-funcall (extern-alien "strlen"
-						(function integer (* char)))
-				  ptr))
-	   (result (make-string length)))
+  (locally
       (declare (optimize (speed 3) (safety 0)))
-      (sb!kernel:%byte-blt sap 0 result 0 length)
-      result)))
+    (let ((length (loop for offset of-type fixnum upfrom 0
+                        until (zerop (sap-ref-8 sap offset))
+                        finally (return offset))))
+      (let ((result (make-string length :element-type 'base-char)))
+	(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))))