X-Git-Url: https://git.distorted.org.uk/~mdw/clg/blobdiff_plain/38c604ec4b161103576e1ecad95d67209da2967c..756b5b48cd58e3d8f1bb4c2fa8c44104a5d9ebed:/glib/gforeign.lisp?ds=sidebyside

diff --git a/glib/gforeign.lisp b/glib/gforeign.lisp
deleted file mode 100644
index 6f27b8a..0000000
--- a/glib/gforeign.lisp
+++ /dev/null
@@ -1,733 +0,0 @@
-;; Common Lisp bindings for GTK+ v2.0
-;; Copyright (C) 1999-2001 Espen S. Johnsen <esj@stud.cs.uit.no>
-;;
-;; This library is free software; you can redistribute it and/or
-;; modify it under the terms of the GNU Lesser General Public
-;; License as published by the Free Software Foundation; either
-;; version 2 of the License, or (at your option) any later version.
-;;
-;; This library is distributed in the hope that it will be useful,
-;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-;; Lesser General Public License for more details.
-;;
-;; You should have received a copy of the GNU Lesser General Public
-;; License along with this library; if not, write to the Free Software
-;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-
-;; $Id: gforeign.lisp,v 1.14 2002-04-02 14:52:25 espen Exp $
-
-(in-package "GLIB")
-
-;;;; Type methods
-
-(defvar *type-methods* (make-hash-table))
-
-(defun ensure-type-method-fun (fname)
-  (unless (fboundp fname)
-    (setf
-     (symbol-function fname)
-     #'(lambda (type-spec &rest args)
-	 (apply
-	  (find-applicable-type-method type-spec fname) type-spec args)))))
-
-(defmacro define-type-method-fun (fname lambda-list)
-  (declare (ignore lambda-list))
-  `(defun ,fname (type-spec &rest args)
-     (apply
-      (find-applicable-type-method type-spec ',fname) type-spec args)))
-
-
-(defun ensure-type-name (type)
-  (etypecase type
-    (symbol type)
-    (pcl::class (class-name type))))
-
-(defun add-type-method (type fname function)
-  (push
-   (cons fname function)
-   (gethash (ensure-type-name type) *type-methods*)))
-
-(defun find-type-method (type fname)
-  (cdr (assoc fname (gethash (ensure-type-name type) *type-methods*))))
-
-(defun find-applicable-type-method (type-spec fname &optional (error t))
-  (flet ((find-superclass-method (class)
-	   (when (and class (class-finalized-p class))
-;  	     (unless (class-finalized-p class)
-;	       (finalize-inheritance class))
-	     (dolist (super (cdr (pcl::class-precedence-list class)))
-	       (return-if (find-type-method super fname)))))
-	 (find-expanded-type-method (type-spec)
-	   (multiple-value-bind (expanded-type-spec expanded-p)
-	       (type-expand-1 type-spec)
-	     (cond
-	      (expanded-p 
-	       (find-applicable-type-method expanded-type-spec fname nil))
-	      ((neq type-spec t)
-	       (find-applicable-type-method t fname nil))))))
-
-    (or
-     (typecase type-spec
-       (pcl::class
-	(or
-	 (find-type-method type-spec fname)
-	 (find-superclass-method type-spec)))
-       (symbol
-	(or
-	 (find-type-method type-spec fname)
-	 (find-expanded-type-method type-spec)
-	 (find-superclass-method (find-class type-spec nil))))
-       (cons
-	(or
-	 (find-type-method (first type-spec) fname)
-	 (find-expanded-type-method type-spec)))
-       (t
-	(error "Invalid type specifier ~A" type-spec)))
-     (and
-      error
-      (error
-       "No applicable method for ~A when called with type specifier ~A"
-       fname type-spec)))))
-
-(defmacro deftype-method (fname type lambda-list &body body)
-  `(progn
-     (ensure-type-method-fun ',fname)
-     (add-type-method ',type ',fname #'(lambda ,lambda-list ,@body))
-     ',fname))
-  
-;; To make the compiler happy
-(eval-when (:compile-toplevel :load-toplevel :execute)
-  (define-type-method-fun translate-type-spec (type-spec))
-  (define-type-method-fun size-of (type-spec))
-  (define-type-method-fun translate-to-alien (type-spec expr &optional weak-ref))
-  (define-type-method-fun translate-from-alien (type-spec expr &optional weak-ref))
-  (define-type-method-fun cleanup-alien (type-spec sap &otional weak-ref))
-  (define-type-method-fun unreference-alien (type-spec sap)))
-
-
-;;;; 
-
-(defvar *type-function-cache* (make-hash-table :test #'equal))
-
-(defun get-cached-function (type-spec fname)
-  (cdr (assoc fname (gethash type-spec *type-function-cache*))))
-
-(defun set-cached-function (type-spec fname function)
-  (push (cons fname function) (gethash type-spec *type-function-cache*))
-  function)
-  
-
-(defun intern-argument-translator (type-spec)
-  (or
-   (get-cached-function type-spec 'argument-translator)
-   (set-cached-function type-spec 'argument-translator
-    (compile
-     nil
-     `(lambda (object)
-	(declare (ignorable object))
-	,(translate-to-alien type-spec 'object t))))))
-
-(defun intern-return-value-translator (type-spec)
-  (or
-   (get-cached-function type-spec 'return-value-translator)
-   (set-cached-function type-spec 'return-value-translator
-    (compile
-     nil
-     `(lambda (alien)
-	(declare (ignorable alien))
-	,(translate-from-alien type-spec 'alien nil))))))
-
-(defun intern-cleanup-function (type-spec)
-  (or
-   (get-cached-function type-spec 'cleanup-function)
-   (set-cached-function type-spec 'cleanup-function
-    (compile
-     nil
-     `(lambda (alien)
-	(declare (ignorable alien))
-	,(cleanup-alien type-spec 'alien t))))))
-
-
-
-;; Returns a function to write an object of the specified type
-;; to a memory location
-(defun intern-writer-function (type-spec)
-  (or
-   (get-cached-function type-spec 'writer-function)
-   (set-cached-function type-spec 'writer-function
-    (compile
-     nil
-     `(lambda (value sap offset)
-	(declare (ignorable value sap offset))
-	(setf
-	 (,(sap-ref-fname type-spec) sap offset)
-	 ,(translate-to-alien type-spec 'value nil)))))))
-
-;; Returns a function to read an object of the specified type
-;; from a memory location
-(defun intern-reader-function (type-spec)
-  (or
-   (get-cached-function type-spec 'reader-function)
-   (set-cached-function type-spec 'reader-function
-    (compile
-     nil
-     `(lambda (sap offset)	 
-	(declare (ignorable sap offset))
-	,(translate-from-alien
-	  type-spec `(,(sap-ref-fname type-spec) sap offset) t))))))
-
-(defun intern-destroy-function (type-spec)
-  (if (atomic-type-p type-spec)
-      #'(lambda (sap offset)	 
-	  (declare (ignore sap offset)))
-    (or
-     (get-cached-function type-spec 'destroy-function)
-     (set-cached-function type-spec 'destroy-function
-       (compile
-	nil
-	`(lambda (sap offset)	 
-	   (declare (ignorable sap offset))
-	   ,(unreference-alien
-	     type-spec `(,(sap-ref-fname type-spec) sap offset))))))))
-
-
-
-;;;;
-
-(defconstant +bits-per-unit+ 8
-  "Number of bits in an addressable unit (byte)")
-
-;; Sizes of fundamental C types in addressable units
-(defconstant +size-of-short+ 2)
-(defconstant +size-of-int+ 4)
-(defconstant +size-of-long+ 4)
-(defconstant +size-of-sap+ 4)
-(defconstant +size-of-float+ 4)
-(defconstant +size-of-double+ 8)
-
-(defun sap-ref-unsigned (sap offset)
-  (sap-ref-32 sap offset))
-
-(defun sap-ref-signed (sap offset)
-  (signed-sap-ref-32 sap offset))
-
-(defun sap-ref-fname (type-spec)
-  (let ((alien-type-spec (mklist (translate-type-spec type-spec))))
-    (ecase (first alien-type-spec)
-      (unsigned
-       (ecase (second alien-type-spec)
-	 (8 'sap-ref-8)
-	 (16 'sap-ref-16)
-	 (32 'sap-ref-32)
-	 (64 'sap-ref-64)))
-      (signed
-       (ecase (second alien-type-spec)
-	 (8 'signed-sap-ref-8)
-	 (16 'signed-sap-ref-16)
-	 (32 'signed-sap-ref-32)
-	 (64 'signed-sap-ref-64)))
-      (system-area-pointer 'sap-ref-sap)
-      (single-float 'sap-ref-single)
-      (double-float 'sap-ref-double))))
-
-
-;;;; Foreign function call interface
-
-(defvar *package-prefix* nil)
-
-(defun set-package-prefix (prefix &optional (package *package*))
-  (let ((package (find-package package)))
-    (delete-if #'(lambda (assoc) (eq (car assoc) package)) *package-prefix*)
-    (push (cons package prefix) *package-prefix*))
-  prefix)
-
-(defun package-prefix (&optional (package *package*))
-  (let ((package (find-package package)))
-    (or
-     (cdr (assoc package *package-prefix*))
-     (substitute #\_ #\- (string-downcase (package-name package))))))
-
-(defun find-prefix-package (prefix)
-  (or
-   (car (rassoc (string-downcase prefix) *package-prefix* :test #'string=))
-   (find-package (string-upcase prefix))))
-
-(defmacro use-prefix (prefix &optional (package *package*))
-  `(eval-when (:compile-toplevel :load-toplevel :execute)
-     (set-package-prefix ,prefix ,package)))
-
-
-(defun default-alien-fname (lisp-name)
-  (let* ((lisp-name-string
-	  (if (char= (char (the simple-string (string lisp-name)) 0) #\%)
-	      (subseq (the simple-string (string lisp-name)) 1)
-	    (string lisp-name)))
-	 (prefix (package-prefix *package*))
-	 (name (substitute #\_ #\- (string-downcase lisp-name-string))))
-    (if (or (not prefix) (string= prefix ""))
-	name
-      (format nil "~A_~A" prefix name))))
-
-(defun default-alien-type-name (type-name)
-  (let ((prefix (package-prefix *package*)))
-    (apply
-     #'concatenate
-     'string
-     (mapcar
-      #'string-capitalize    
-      (cons prefix (split-string (symbol-name type-name) #\-))))))
-
-(defun default-type-name (alien-name)
-  (let ((parts
-	 (mapcar
-	  #'string-upcase
-	  (split-string-if alien-name #'upper-case-p))))
-    (intern
-     (concatenate-strings
-      (rest parts) #\-) (find-prefix-package (first parts)))))
-    
-	 
-(defmacro defbinding (name lambda-list return-type-spec &rest docs/args)
-  (multiple-value-bind (lisp-name c-name)
-      (if (atom name)
- 	  (values name (default-alien-fname name))
- 	(values-list name))
-		       
-    (let ((supplied-lambda-list lambda-list)
-	  (docs nil)
-	  (args nil))
-      (dolist (doc/arg docs/args)
-	(if (stringp doc/arg)
-	    (push doc/arg docs)
-	  (progn
-	    (destructuring-bind (expr type &optional (style :in)) doc/arg
-	      (unless (member style '(:in :out :in-out))
-		(error "Bogus argument style ~S in ~S." style doc/arg))
-	      (when (and
-		     (not supplied-lambda-list)
-		     (namep expr) (member style '(:in :in-out)))
-		(push expr lambda-list))
-	      (push
-	       (list (if (namep expr) expr (gensym)) expr type style) args)))))
-      
-      (%defbinding
-       c-name lisp-name (or supplied-lambda-list (nreverse lambda-list))
-       return-type-spec (reverse docs) (reverse args)))))
-
-#+cmu
-(defun %defbinding (foreign-name lisp-name lambda-list
-		    return-type-spec docs args)
-  (ext:collect ((alien-types) (alien-bindings) (alien-parameters)
-		(alien-values) (alien-deallocators))
-    (dolist (arg args)
-      (destructuring-bind (var expr type-spec style) arg
-	(let ((declaration (translate-type-spec type-spec))
-	      (deallocation (cleanup-alien type-spec var t)))
-	  (cond
-	   ((member style '(:out :in-out))
-	    (alien-types `(* ,declaration))
-	    (alien-parameters `(addr ,var))
-	    (alien-bindings
-	     `(,var ,declaration
-	       ,@(when (eq style :in-out)
-		   (list (translate-to-alien type-spec expr t)))))
-	    (alien-values (translate-from-alien type-spec var nil)))
-	  (deallocation
-	   (alien-types declaration)
-	   (alien-bindings
-	    `(,var ,declaration ,(translate-to-alien type-spec expr t)))
-	   (alien-parameters var)
-	   (alien-deallocators deallocation))
-	  (t
-	   (alien-types declaration)
-	   (alien-parameters (translate-to-alien type-spec expr t)))))))
-
-    (let ((alien-funcall `(alien-funcall ,lisp-name ,@(alien-parameters))))
-      `(defun ,lisp-name ,lambda-list
-	 ,@docs
-	 (declare (optimize (ext:inhibit-warnings 3)))
-	 (with-alien ((,lisp-name
-		       (function
-			,(translate-type-spec return-type-spec)
-			,@(alien-types))
-		       :extern ,foreign-name)
-		      ,@(alien-bindings))
-	   ,(if return-type-spec
-		`(let ((result
-			,(translate-from-alien return-type-spec alien-funcall nil)))
-		   ,@(alien-deallocators)
-		   (values result ,@(alien-values)))
-	      `(progn
-		 ,alien-funcall
-		 ,@(alien-deallocators)
-		 (values ,@(alien-values)))))))))
-
-
-(defun mkbinding (name return-type &rest arg-types)
-   (declare (optimize (ext:inhibit-warnings 3)))
-   (let* ((ftype
-	   `(function
-	     ,@(mapcar #'translate-type-spec (cons return-type arg-types))))
-	 (alien
-	  (alien::%heap-alien
-	   (alien::make-heap-alien-info
-	    :type (alien::parse-alien-type ftype)
-	    :sap-form (system:foreign-symbol-address name))))
-	 (translate-arguments
-	  (mapcar #'intern-argument-translator arg-types))
-	 (translate-return-value (intern-return-value-translator return-type))
-	 (cleanup-arguments (mapcar #'intern-cleanup-function arg-types)))
-	 
-    #'(lambda (&rest args)
-	(map-into args #'funcall translate-arguments args)
-	(prog1
-	    (funcall
-	     translate-return-value (apply #'alien:alien-funcall alien args))
-	  (mapc #'funcall cleanup-arguments args)))))
-
-
-(defun type-translateable-p (type-spec)
-  (find-applicable-type-method type-spec 'translate-type-spec nil))
-
-(defun every-type-translateable-p (type-specs)
-  (every #'type-translateable-p type-specs))
-
-(defun mkbinding-late (name return-type &rest arg-types)
-  (if (every-type-translateable-p (cons return-type arg-types))
-      (apply #'mkbinding name return-type arg-types)
-    (let ((binding nil))
-      #'(lambda (&rest args)
-	  (cond
-	   (binding (apply binding args))
-	   ((every-type-translateable-p (cons return-type arg-types))
-	    (setq binding (apply #'mkbinding name return-type arg-types))
-	    (apply binding args))
-	   (t
-	    (dolist (type-spec (cons return-type arg-types))
-	      (unless (type-translateable-p type-spec)
-		(error "Can't translate type ~A" type-spec)))))))))
-
-  
-
-;;;; Definitons and translations of fundamental types
-
-(deftype long (&optional (min '*) (max '*)) `(integer ,min ,max))
-(deftype unsigned-long (&optional (min '*) (max '*)) `(integer ,min ,max))
-(deftype int (&optional (min '*) (max '*)) `(long ,min ,max))
-(deftype unsigned-int (&optional (min '*) (max '*)) `(unsigned-long ,min ,max))
-(deftype short (&optional (min '*) (max '*)) `(int ,min ,max))
-(deftype unsigned-short (&optional (min '*) (max '*)) `(unsigned-int ,min ,max))
-(deftype signed (&optional (size '*)) `(signed-byte ,size))
-(deftype unsigned (&optional (size '*)) `(signed-byte ,size))
-(deftype char () 'base-char)
-(deftype pointer () 'system-area-pointer)
-(deftype boolean (&optional (size '*))
-  (declare (ignore size))
-  `(member t nil))
-(deftype invalid () nil)
-
-(defun atomic-type-p (type-spec)
-  (or
-   (eq type-spec 'pointer)
-   (not (eq (translate-type-spec type-spec) 'system-area-pointer))))
-
-
-(deftype-method cleanup-alien t (type-spec sap &optional weak-ref)
-  (declare (ignore type-spec sap weak-ref))
-  nil)
-
-
-(deftype-method translate-to-alien integer (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-(deftype-method translate-from-alien integer (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-
-(deftype-method translate-type-spec fixnum (type-spec)
-  (declare (ignore type-spec))
-  (translate-type-spec 'signed))
-
-(deftype-method size-of fixnum (type-spec)
-  (declare (ignore type-spec))
-  (size-of 'signed))
-
-(deftype-method translate-to-alien fixnum (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-(deftype-method translate-from-alien fixnum (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-
-(deftype-method translate-type-spec long (type-spec)
-  (declare (ignore type-spec))
-  `(signed ,(* +bits-per-unit+ +size-of-long+)))
-
-(deftype-method size-of long (type-spec)
-  (declare (ignore type-spec))
-  +size-of-long+)
-
-
-(deftype-method translate-type-spec unsigned-long (type-spec)
-  (declare (ignore type-spec))
-  `(unsigned ,(* +bits-per-unit+ +size-of-long+)))
-
-(deftype-method size-of unsigned-long (type-spec)
-  (declare (ignore type-spec))
-  +size-of-long+)
-
-
-(deftype-method translate-type-spec int (type-spec)
-  (declare (ignore type-spec))
-  `(signed ,(* +bits-per-unit+ +size-of-int+)))
-
-(deftype-method size-of int (type-spec)
-  (declare (ignore type-spec))
-  +size-of-int+)
-
-
-(deftype-method translate-type-spec unsigned-int (type-spec)
-  (declare (ignore type-spec))
-  `(unsigned ,(* +bits-per-unit+ +size-of-int+)))
-
-(deftype-method size-of unsigned-int (type-spec)
-  (declare (ignore type-spec))
-  +size-of-int+)
-
-
-(deftype-method translate-type-spec short (type-spec)
-  (declare (ignore type-spec))
-  `(signed ,(* +bits-per-unit+ +size-of-short+)))
-
-(deftype-method size-of short (type-spec)
-  (declare (ignore type-spec))
-  +size-of-short+)
-
-
-(deftype-method translate-type-spec unsigned-short (type-spec)
-  (declare (ignore type-spec))
-  `(unsigned ,(* +bits-per-unit+ +size-of-short+)))
-
-(deftype-method size-of unsigned-short (type-spec)
-  (declare (ignore type-spec))
-  +size-of-short+)
-
-
-(deftype-method translate-type-spec signed-byte (type-spec)
-  (let ((size (second (mklist (type-expand-to 'signed-byte type-spec)))))
-    `(signed
-      ,(cond
-	((member size '(nil *)) (* +bits-per-unit+ +size-of-int+))
-	(t size)))))
-
-(deftype-method size-of signed-byte (type-spec)
-  (let ((size (second (mklist (type-expand-to 'signed-byte type-spec)))))
-    (cond
-     ((member size '(nil *)) +size-of-int+)
-     (t (/ size +bits-per-unit+)))))
-
-(deftype-method translate-to-alien signed-byte (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-(deftype-method translate-from-alien signed-byte
-    (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-
-(deftype-method translate-type-spec unsigned-byte (type-spec)
-  (let ((size (second (mklist (type-expand-to 'unsigned-byte type-spec)))))
-    `(signed
-      ,(cond
-	((member size '(nil *)) (* +bits-per-unit+ +size-of-int+))
-	(t size)))))
-
-(deftype-method size-of unsigned-byte (type-spec)
-  (let ((size (second (mklist (type-expand-to 'unsigned-byte type-spec)))))
-    (cond
-     ((member size '(nil *)) +size-of-int+)
-     (t (/ size +bits-per-unit+)))))
-
-(deftype-method translate-to-alien unsigned-byte (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-(deftype-method translate-from-alien unsigned-byte
-    (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-
-(deftype-method translate-type-spec single-float (type-spec)
-  (declare (ignore type-spec))
-  'single-float)
-
-(deftype-method size-of single-float (type-spec)
-  (declare (ignore type-spec))
-  +size-of-float+)
-
-(deftype-method translate-to-alien single-float (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-(deftype-method translate-from-alien single-float
-    (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-
-(deftype-method translate-type-spec double-float (type-spec)
-  (declare (ignore type-spec))
-  'double-float)
-
-(deftype-method size-of double-float (type-spec)
-  (declare (ignore type-spec))
-  +size-of-double+)
-
-(deftype-method translate-to-alien double-float (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-(deftype-method translate-from-alien double-float
-    (type-spec number &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  number)
-
-
-(deftype-method translate-type-spec base-char (type-spec)
-  (declare (ignore type-spec))
-  `(unsigned ,+bits-per-unit+))
-
-(deftype-method size-of base-char (type-spec)
-  (declare (ignore type-spec))
-  1)
-
-(deftype-method translate-to-alien base-char (type-spec char &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  `(char-code ,char))
-
-(deftype-method translate-from-alien base-char (type-spec code &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  `(code-char ,code))
-
-
-(deftype-method translate-type-spec string (type-spec)
-  (declare (ignore type-spec))
-  'system-area-pointer)
-
-(deftype-method size-of string (type-spec)
-  (declare (ignore type-spec))
-  +size-of-sap+)
-
-(deftype-method translate-to-alien string (type-spec string &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  `(let ((string ,string))
-     ;; Always copy strings to prevent seg fault due to GC
-     (copy-memory
-      (make-pointer (1+ (kernel:get-lisp-obj-address string)))
-      (1+ (length string)))))
-
-(deftype-method translate-from-alien string
-    (type-spec c-string &optional weak-ref)
-  (declare (ignore type-spec))
-  `(let ((c-string ,c-string))
-     (unless (null-pointer-p c-string)
-       (prog1
-	   (c-call::%naturalize-c-string c-string)
-	 ;,(unless weak-ref `(deallocate-memory c-string))
-	 ))))
-
-(deftype-method cleanup-alien string (type-spec c-string &optional weak-ref)
-  (when weak-ref
-    (unreference-alien type-spec c-string)))
-
-(deftype-method unreference-alien string (type-spec c-string)
-  (declare (ignore type-spec))
-  `(let ((c-string ,c-string))
-     (unless (null-pointer-p c-string)
-       (deallocate-memory c-string))))
-  
-
-(deftype-method translate-type-spec boolean (type-spec)
-  (translate-type-spec
-   (cons 'unsigned (cdr (mklist (type-expand-to 'boolean type-spec))))))
-
-(deftype-method size-of boolean (type-spec)
-  (size-of
-   (cons 'unsigned (cdr (mklist (type-expand-to 'boolean type-spec))))))
-
-(deftype-method translate-to-alien boolean (type-spec boolean &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  `(if ,boolean 1 0))
-
-(deftype-method translate-from-alien boolean (type-spec int &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  `(not (zerop ,int)))
-
-
-(deftype-method translate-type-spec or (union-type)
-  (let* ((member-types (cdr (type-expand-to 'or union-type)))
-	 (alien-type (translate-type-spec (first member-types))))
-    (dolist (type (cdr member-types))
-      (unless (eq alien-type (translate-type-spec type))
-	(error "No common alien type specifier for union type: ~A" union-type)))
-    alien-type))
-
-(deftype-method size-of or (union-type)
-  (size-of (first (cdr (type-expand-to 'or union-type)))))
-
-(deftype-method translate-to-alien or (union-type-spec expr &optional weak-ref)
-  (destructuring-bind (name &rest type-specs)
-      (type-expand-to 'or union-type-spec)
-    (declare (ignore name))
-    `(let ((value ,expr))
-       (etypecase value
-	 ,@(map
-	    'list
-	      #'(lambda (type-spec)
-		  (list type-spec (translate-to-alien type-spec 'value weak-ref)))
-	      type-specs)))))
-
-
-(deftype-method translate-type-spec system-area-pointer (type-spec)
-  (declare (ignore type-spec))
-  'system-area-pointer)
-
-(deftype-method size-of system-area-pointer (type-spec)
-  (declare (ignore type-spec))
-  +size-of-sap+)
-
-(deftype-method translate-to-alien system-area-pointer (type-spec sap &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  sap)
-
-(deftype-method translate-from-alien system-area-pointer
-    (type-spec sap &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  sap)
-
-
-(deftype-method translate-type-spec null (type-spec)
-  (declare (ignore type-spec))
-  'system-area-pointer)
-
-(deftype-method translate-to-alien null (type-spec expr &optional weak-ref)
-  (declare (ignore type-spec expr weak-ref))
-  `(make-pointer 0))
-
-
-(deftype-method translate-type-spec nil (type-spec)
-  (declare (ignore type-spec))
-  'void)
-
-(deftype-method translate-from-alien nil (type-spec expr &optional weak-ref)
-  (declare (ignore type-spec weak-ref))
-  `(progn
-     ,expr
-     (values)))