0.8.21.5:

[sbcl.git] / src / code / target-c-call.lisp

diff --git a/src/code/target-c-call.lisp b/src/code/target-c-call.lisp
index 0d4e2cb..4730dbd 100644 (file)
--- 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.
@@ -10,38 +15,51 @@
 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
 ;;;; files for more information.
 
-(in-package "SB!C-CALL")
+(in-package "SB!ALIEN")
 \f
 ;;;; extra types
 
-(def-alien-type char (integer 8))
-(def-alien-type short (integer 16))
-(def-alien-type int (integer 32))
-(def-alien-type long (integer #!-alpha 32 #!+alpha 64))
+(define-alien-type char (integer 8))
+(define-alien-type short (integer 16))
+(define-alien-type int (integer 32))
+(define-alien-type long (integer #.sb!vm::n-machine-word-bits))
 
-(def-alien-type unsigned-char (unsigned 8))
-(def-alien-type unsigned-short (unsigned 16))
-(def-alien-type unsigned-int (unsigned 32))
-(def-alien-type unsigned-long (unsigned #!-alpha 32 #!+alpha 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 #.sb!vm::n-machine-word-bits))
 
-(def-alien-type float single-float)
-(def-alien-type double double-float)
+(define-alien-type float single-float)
+(define-alien-type double double-float)
 
-(def-alien-type-translator void ()
+(define-alien-type-translator void ()
   (parse-alien-type '(values) (sb!kernel:make-null-lexenv)))
 \f
+;;; 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.
 (defun %naturalize-c-string (sap)
   (declare (type system-area-pointer sap))
-  (with-alien ((ptr (* char) sap))
-    (locally
-     (declare (optimize (speed 3) (safety 0)))
-     (let ((length (loop
-                    for offset of-type fixnum upfrom 0
-                    until (zerop (deref ptr offset))
-                    finally (return offset))))
-       (let ((result (make-string length)))
-        (sb!kernel:copy-from-system-area (alien-sap ptr) 0
-                                         result (* sb!vm:vector-data-offset
-                                                   sb!vm:n-word-bits)
-                                         (* length sb!vm:byte-bits))
-        result)))))
+  (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 %naturalize-utf8-string (sap)
+  (declare (type system-area-pointer sap))
+  (locally
+    (declare (optimize (speed 3) (safety 0)))
+    (let ((byte-length (do* ((offset 0 (1+ offset))
+                            (byte #1=(sap-ref-8 sap offset) #1#))
+                           ((zerop byte) offset))))
+      (handler-bind ((sb!impl::octet-decoding-error #'sb!impl::use-unicode-replacement-char))
+       (sb!impl::utf8->string-sap-ref-8 sap 0 byte-length)))))
+
+(defun %deport-utf8-string (string)
+  (declare (type simple-string string))
+  (sb!impl::string->utf8 string 0 (length string) 1))