remove misplaced AVER

[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..c978ac8 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 +15,76 @@
 ;;;; 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))
+#!-(and win32 x86-64)
+(define-alien-type long (integer #.sb!vm::n-machine-word-bits))
+#!+(and win32 x86-64)
+(define-alien-type long (integer 32))
 
-(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 long-long (integer 64))
 
-(def-alien-type float single-float)
-(def-alien-type double double-float)
+(define-alien-type unsigned-char (unsigned 8))
+(define-alien-type unsigned-short (unsigned 16))
+(define-alien-type unsigned-int (unsigned 32))
+#!-(and win32 x86-64)
+(define-alien-type unsigned-long (unsigned #.sb!vm::n-machine-word-bits))
+#!+(and win32 x86-64)
+(define-alien-type unsigned-long (unsigned 32))
+(define-alien-type unsigned-long-long (unsigned 64))
 
-(def-alien-type-translator void ()
+(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)))
 \f
+
+(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))
-    (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 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)))
+    (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))))