X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Ftarget-c-call.lisp;h=7a83d1021a80879036a93fc2ee5765291ff7c383;hb=04a651e749befd65ffd8bf49f689b6e7d55607e2;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..7a83d10 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.
@@ -10,37 +15,69 @@
 ;;;; 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
 
 (define-alien-type char (integer 8))
 (define-alien-type short (integer 16))
 (define-alien-type int (integer 32))
-(define-alien-type long (integer #!-alpha 32 #!+alpha 64))
+(define-alien-type long (integer #.sb!vm::n-machine-word-bits))
+(define-alien-type long-long (integer 64))
 
 (define-alien-type unsigned-char (unsigned 8))
 (define-alien-type unsigned-short (unsigned 16))
 (define-alien-type unsigned-int (unsigned 32))
-(define-alien-type unsigned-long (unsigned #!-alpha 32 #!+alpha 64))
+(define-alien-type unsigned-long (unsigned #.sb!vm::n-machine-word-bits))
+(define-alien-type unsigned-long-long (unsigned 64))
 
 (define-alien-type float single-float)
 (define-alien-type double double-float)
 
+(define-alien-type utf8-string (c-string :external-format :utf8))
+
 (define-alien-type-translator void ()
   (parse-alien-type '(values) (sb!kernel:make-null-lexenv)))
 
-#+nil 
-(define-alien-routine strlen integer
-  (s (* char)))
 
+(defun default-c-string-external-format ()
+  #!+sb-xc
+  :latin-1
+  #!-sb-xc
+  (or *default-c-string-external-format*
+      (setf *default-c-string-external-format*
+            (sb!impl::default-external-format))))
+
+;;; FIXME: %NATURALIZE-C-STRING (and the UTF8 siblings below) would
+;;; appear to be vulnerable to the lisp string moving from underneath
+;;; them if the world undergoes a GC, possibly triggered by another
+;;; thread.  Ugh.
+;;;
+;;; Actually the above shouldn't happen; x86 and x86-64 use GENCGC,
+;;; so the string can't move by virtue of pointers to it from
+;;; outside the heap. Other platforms will access the lisp string
+;;; through the GC-safe interior pointer. -- JES, 2006-01-13
 (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)))
+    (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-ub8-from-system-area sap 0 result 0 length)
+        result))))
+
+(defun string-to-c-string (string external-format)
+  (declare (type simple-string string))
+  (locally
+      (declare (optimize (speed 3) (safety 0)))
+    (let ((external-format (sb!impl::get-external-format-or-lose external-format)))
+      (funcall (sb!impl::ef-write-c-string-fun external-format) string))))
+
+(defun c-string-to-string (sap external-format element-type)
+  (declare (type system-area-pointer sap))
+  (locally
       (declare (optimize (speed 3) (safety 0)))
-      (sb!kernel:%byte-blt sap 0 result 0 length)
-      result)))
+    (let ((external-format (sb!impl::get-external-format-or-lose external-format)))
+      (funcall (sb!impl::ef-read-c-string-fun external-format) sap element-type))))