[clg] / glib / genums.lisp

;; Common Lisp bindings for GTK+ v2.x
;; Copyright 2000-2005 Espen S. Johnsen <espen@users.sf.net>
;;
;; Permission is hereby granted, free of charge, to any person obtaining
;; a copy of this software and associated documentation files (the
;; "Software"), to deal in the Software without restriction, including
;; without limitation the rights to use, copy, modify, merge, publish,
;; distribute, sublicense, and/or sell copies of the Software, and to
;; permit persons to whom the Software is furnished to do so, subject to
;; the following conditions:
;;
;; The above copyright notice and this permission notice shall be
;; included in all copies or substantial portions of the Software.
;;
;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

;; $Id: genums.lisp,v 1.14 2005/04/24 13:24:41 espen Exp $

(in-package "GLIB")
  
;;;; Generic enum type

(defun %map-enum (mappings op)
  (loop
   as value = 0 then (1+ value)
   for mapping in mappings
   collect (let ((symbol (if (atom mapping) mapping (first mapping))))
	     (unless (atom mapping)
	       (setq value (second mapping)))
	     (ecase op
	       (:symbol-int `(,symbol ,value))
	       (:int-symbol `(,value ,symbol))
	       (:int-quoted-symbol `(,value ',symbol))
	       (:symbols symbol)))))

(deftype enum (&rest args)
  `(member ,@(%map-enum args :symbols)))

(defmethod alien-type ((type (eql 'enum)) &rest args)
  (declare (ignore type args))
  (alien-type 'signed))

(defmethod size-of ((type (eql 'enum)) &rest args)
  (declare (ignore type args))
  (size-of 'signed))

(defmethod to-alien-form (form (type (eql 'enum)) &rest args)
  (declare (ignore type))
  `(case ,form
    ,@(%map-enum args :symbol-int)
    (t (error 'type-error :datum ,form :expected-type '(enum ,@args)))))


(defmethod from-alien-form (form (type (eql 'enum)) &rest args)
  (declare (ignore type))
  `(case ,form
    ,@(%map-enum args :int-quoted-symbol)))

(defmethod to-alien-function ((type (eql 'enum)) &rest args)
  (declare (ignore type))
  (let ((mappings (%map-enum args :symbol-int)))
    #'(lambda (enum)
	(or
	 (second (assoc enum mappings))
	 (error 'type-error :datum enum :expected-type (cons 'enum args))))))

(defmethod from-alien-function ((type (eql 'enum)) &rest args)
  (declare (ignore type))
  (let ((mappings (%map-enum args :int-symbol)))
    #'(lambda (int)
	(second (assoc int mappings)))))

(defmethod writer-function ((type (eql 'enum)) &rest args)
  (declare (ignore type))
  (let ((writer (writer-function 'signed))
	(function (apply #'to-alien-function 'enum args)))
    #'(lambda (enum location &optional (offset 0))
	(funcall writer (funcall function enum) location offset))))
    
(defmethod reader-function ((type (eql 'enum)) &rest args)
  (declare (ignore type))
  (let ((reader (reader-function 'signed))
	(function (apply #'from-alien-function 'enum args)))
    #'(lambda (location &optional (offset 0))
	(funcall function (funcall reader location offset)))))

(defun enum-int (enum type)
  (funcall (to-alien-function type) enum))

(defun int-enum (int type)
  (funcall (from-alien-function type) int))

(defun enum-mapping (type)
  (rest (type-expand-to 'enum type)))


;;;; Named enum types

(defmacro define-enum-type (name &rest args)
  (let ((enum-int (intern (format nil "~A-TO-INT" name)))
	(int-enum (intern (format nil "INT-TO-~A" name))))
    `(progn
       (deftype ,name () '(enum ,@args))
       (defun ,enum-int (enum)
	 (case enum
	   ,@(%map-enum args :symbol-int)
	   (t (error 'type-error :datum enum :expected-type ',name))))
       (defun ,int-enum (value)
	 (case value
	   ,@(%map-enum args :int-quoted-symbol)))
       (defmethod to-alien-form (form (type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (list ',enum-int form))
       (defmethod from-alien-form (form (type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (list ',int-enum form))
       (defmethod to-alien-function ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 #',enum-int)
       (defmethod from-alien-function ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 #',int-enum)
       (defmethod writer-function ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (let ((writer (writer-function 'signed)))
	   #'(lambda (enum location &optional (offset 0))
	       (funcall writer (,enum-int enum) location offset))))    
       (defmethod reader-function ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (let ((reader (reader-function 'signed)))
	   #'(lambda (location &optional (offset 0))
	       (,int-enum (funcall reader location offset))))))))


;;;;  Generic flags type

(defun %map-flags (mappings op)
  (loop
   as value = 1 then (ash value 1)
   for mapping in mappings
   collect (let ((symbol (if (atom mapping) mapping (first mapping))))
	     (unless (atom mapping)
	       (setq value (second mapping)))
	     (ecase op
	       (:symbol-int `(,symbol ,value))
	       (:int-symbol `(,value ,symbol))
	       (:symbols symbol)))))

(deftype flags (&rest args)
  `(or (member ,@(%map-flags args :symbols)) list))

(defmethod alien-type ((type (eql 'flags)) &rest args)
  (declare (ignore type args))
  (alien-type 'unsigned))

(defmethod size-of ((type (eql 'flags)) &rest args)
  (declare (ignore type args))
  (size-of 'unsigned))

(defmethod to-alien-form (flags (type (eql 'flags)) &rest args)
  `(reduce #'logior (mklist ,flags)
    :key #'(lambda (flag)
	     (case flag
	       ,@(%map-flags args :symbol-int)
	       (t (error 'type-error :datum ,flags 
		   :expected-type '(,type ,@args)))))))

(defmethod from-alien-form (value (type (eql 'flags)) &rest args)
  (declare (ignore type))
  `(loop
    for (int symbol)  in ',(%map-flags args :int-symbol)
    when (= (logand ,value int) int)
    collect symbol))

(defmethod to-alien-function ((type (eql 'flags)) &rest args)
  (declare (ignore type))
  (let ((mappings (%map-flags args :symbol-int)))
    #'(lambda (flags)
	(reduce #'logior (mklist flags)
	 :key #'(lambda (flag)
		  (or
		   (second (assoc flag mappings))
		   (error 'type-error :datum flags 
		    :expected-type (cons 'flags args))))))))

(defmethod from-alien-function ((type (eql 'flags)) &rest args)
  (declare (ignore type))
  (let ((mappings (%map-flags args :int-symbol)))
    #'(lambda (value)
	(loop
	 for (int symbol) in mappings
	 when (= (logand value int) int)
	 collect symbol))))

(defmethod writer-function ((type (eql 'flags)) &rest args)
  (declare (ignore type))
  (let ((writer (writer-function 'unsigned))
	(function (apply #'to-alien-function 'flags args)))
    #'(lambda (flags location &optional (offset 0))
	(funcall writer (funcall function flags) location offset))))
    
(defmethod reader-function ((type (eql 'flags)) &rest args)
  (declare (ignore type))
  (let ((reader (reader-function 'unsigned))
	(function (apply #'from-alien-function 'flags args)))
    #'(lambda (location &optional (offset 0))
	(funcall function (funcall reader location offset)))))


;;;; Named flags types

(defmacro define-flags-type (name &rest args)
  (let ((flags-int (intern (format nil "~A-TO-INT" name)))
	(int-flags (intern (format nil "INT-TO-~A" name)))
	(satisfies  (intern (format nil "~A-P" name))))
    `(progn
       (deftype ,name () '(satisfies ,satisfies))
       (defun ,satisfies (object)
	 (flet ((valid-p (ob)
		  (find ob ',(%map-flags args :symbols))))
	   (typecase object
	     (symbol (valid-p object))
	     (list (every #'valid-p object)))))
       (defun ,flags-int (flags)
	 (reduce #'logior (mklist flags)
	  :key #'(lambda (flag)
		   (case flag
		     ,@(%map-flags args :symbol-int)
		     (t (error 'type-error :datum flags 
		         :expected-type ',name))))))
       (defun ,int-flags (value)
	 (loop
	  for (int symbol) in ',(%map-flags args :int-symbol)
	  when(= (logand value int) int)
	  collect symbol))
       (defmethod alien-type ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (alien-type 'flags))
       (defmethod size-of ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (size-of 'flags))
       (defmethod to-alien-form (form (type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (list ',flags-int form))
       (defmethod from-alien-form (form (type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (list ',int-flags form))
       (defmethod to-alien-function ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 #',flags-int)
       (defmethod from-alien-function ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 #',int-flags)
       (defmethod writer-function ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (let ((writer (writer-function 'signed)))
	   #'(lambda (flags location &optional (offset 0))
	       (funcall writer (,flags-int flags) location offset))))    
       (defmethod reader-function ((type (eql ',name)) &rest args)
	 (declare (ignore type args))
	 (let ((reader (reader-function 'signed)))
	   #'(lambda (location &optional (offset 0))
	       (,int-flags (funcall reader location offset))))))))


;;;; Type definition by introspection

(defun %query-enum-or-flags-values (query-function class type)
  (multiple-value-bind (sap length)
      (funcall query-function (type-class-ref type))
    (let ((values nil)
	  (size (proxy-instance-size (find-class class)))
	  (proxy (make-instance class :location sap)))
      (dotimes (i length)
	(with-slots (location nickname value) proxy
	  (setf location sap)
	  (setq sap (sap+ sap size))
	  (push
	   (list
	    (intern (substitute #\- #\_ (string-upcase nickname)) "KEYWORD")
	    value)
	   values)))
      values)))


(defclass %enum-value (struct)
  ((value :allocation :alien :type int)
   (name :allocation :alien :type string)
   (nickname :allocation :alien :type string))
  (:metaclass static-struct-class))

(defbinding %enum-class-values () pointer
  (class pointer)
  (n-values unsigned-int :out))

(defun query-enum-values (type)
  (%query-enum-or-flags-values #'%enum-class-values '%enum-value type))


(defclass %flags-value (struct)
  ((value :allocation :alien :type unsigned-int)
   (name :allocation :alien :type string)
   (nickname :allocation :alien :type string))
  (:metaclass static-struct-class))

(defbinding %flags-class-values () pointer
  (class pointer)
  (n-values unsigned-int :out))

(defun query-flags-values (type)
  (%query-enum-or-flags-values #'%flags-class-values '%flags-value type))


(defun expand-enum-type (type-number forward-p options)
  (declare (ignore forward-p))
  (let* ((super (supertype type-number))
	 (type (type-from-number type-number))
	 (mappings (getf options :mappings))
	 (expanded-mappings
	  (append
	   (delete-if
	    #'(lambda (mapping)
		(or
		 (assoc (first mapping) mappings)
		 (rassoc (cdr mapping) mappings :test #'equal)))
	    (if (eq super 'enum)
		(query-enum-values type-number)
	      (query-flags-values type-number)))
	   (remove-if
	    #'(lambda (mapping) (eq (second mapping) nil)) mappings))))
    `(progn
       (register-type ',type ',(find-type-init-function type-number))
       ,(ecase super
	  (enum `(define-enum-type ,type ,@expanded-mappings))
	  (flags `(define-flags-type ,type ,@expanded-mappings))))))


(register-derivable-type 'enum "GEnum" 'expand-enum-type)
(register-derivable-type 'flags "GFlags" 'expand-enum-type)
Commit	Line	Data
55212af1	1	;; Common Lisp bindings for GTK+ v2.x
55212af1	2	;; Copyright 2000-2005 Espen S. Johnsen <espen@users.sf.net>
b44caf77	3	;;
55212af1	4	;; Permission is hereby granted, free of charge, to any person obtaining
	5	;; a copy of this software and associated documentation files (the
	6	;; "Software"), to deal in the Software without restriction, including
	7	;; without limitation the rights to use, copy, modify, merge, publish,
	8	;; distribute, sublicense, and/or sell copies of the Software, and to
	9	;; permit persons to whom the Software is furnished to do so, subject to
	10	;; the following conditions:
b44caf77	11	;;
55212af1	12	;; The above copyright notice and this permission notice shall be
55212af1	13	;; included in all copies or substantial portions of the Software.
b44caf77	14	;;
55212af1	15	;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	16	;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	17	;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
	18	;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
	19	;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
	20	;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
	21	;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
b44caf77	22
688630cc	23	;; $Id: genums.lisp,v 1.14 2005/04/24 13:24:41 espen Exp $
b44caf77	24
b44caf77	25	(in-package "GLIB")
3a935dfa	26
6baf860c	27	;;;; Generic enum type
b44caf77	28
564b73ea	29	(defun %map-enum (mappings op)
564b73ea	30	(loop
8bca7df5	31	as value = 0 then (1+ value)
564b73ea	32	for mapping in mappings
	33	collect (let ((symbol (if (atom mapping) mapping (first mapping))))
	34	(unless (atom mapping)
	35	(setq value (second mapping)))
	36	(ecase op
1ce06bbe	37	(:symbol-int `(,symbol ,value))
	38	(:int-symbol `(,value ,symbol))
	39	(:int-quoted-symbol `(,value ',symbol))
564b73ea	40	(:symbols symbol)))))
564b73ea	41
b44caf77	42	(deftype enum (&rest args)
6baf860c	43	`(member ,@(%map-enum args :symbols)))
	44
	45	(defmethod alien-type ((type (eql 'enum)) &rest args)
	46	(declare (ignore type args))
	47	(alien-type 'signed))
	48
	49	(defmethod size-of ((type (eql 'enum)) &rest args)
	50	(declare (ignore type args))
	51	(size-of 'signed))
	52
	53	(defmethod to-alien-form (form (type (eql 'enum)) &rest args)
	54	(declare (ignore type))
564b73ea	55	`(case ,form
	56	,@(%map-enum args :symbol-int)
	57	(t (error 'type-error :datum ,form :expected-type '(enum ,@args)))))
	58
6baf860c	59
	60	(defmethod from-alien-form (form (type (eql 'enum)) &rest args)
	61	(declare (ignore type))
1ce06bbe	62	`(case ,form
1ce06bbe	63	,@(%map-enum args :int-quoted-symbol)))
6baf860c	64
6baf860c	65	(defmethod to-alien-function ((type (eql 'enum)) &rest args)
564b73ea	66	(declare (ignore type))
564b73ea	67	(let ((mappings (%map-enum args :symbol-int)))
6baf860c	68	#'(lambda (enum)
	69	(or
	70	(second (assoc enum mappings))
564b73ea	71	(error 'type-error :datum enum :expected-type (cons 'enum args))))))
6baf860c	72
	73	(defmethod from-alien-function ((type (eql 'enum)) &rest args)
	74	(declare (ignore type))
564b73ea	75	(let ((mappings (%map-enum args :int-symbol)))
6baf860c	76	#'(lambda (int)
	77	(second (assoc int mappings)))))
	78
	79	(defmethod writer-function ((type (eql 'enum)) &rest args)
	80	(declare (ignore type))
	81	(let ((writer (writer-function 'signed))
	82	(function (apply #'to-alien-function 'enum args)))
	83	#'(lambda (enum location &optional (offset 0))
	84	(funcall writer (funcall function enum) location offset))))
	85
	86	(defmethod reader-function ((type (eql 'enum)) &rest args)
	87	(declare (ignore type))
	88	(let ((reader (reader-function 'signed))
	89	(function (apply #'from-alien-function 'enum args)))
	90	#'(lambda (location &optional (offset 0))
	91	(funcall function (funcall reader location offset)))))
	92
f97131c0	93	(defun enum-int (enum type)
f97131c0	94	(funcall (to-alien-function type) enum))
b44caf77	95
f97131c0	96	(defun int-enum (int type)
	97	(funcall (from-alien-function type) int))
	98
	99	(defun enum-mapping (type)
	100	(rest (type-expand-to 'enum type)))
b44caf77	101
f463115b	102
	103	;;;; Named enum types
	104
	105	(defmacro define-enum-type (name &rest args)
	106	(let ((enum-int (intern (format nil "~A-TO-INT" name)))
	107	(int-enum (intern (format nil "INT-TO-~A" name))))
	108	`(progn
	109	(deftype ,name () '(enum ,@args))
564b73ea	110	(defun ,enum-int (enum)
	111	(case enum
	112	,@(%map-enum args :symbol-int)
	113	(t (error 'type-error :datum enum :expected-type ',name))))
f463115b	114	(defun ,int-enum (value)
1ce06bbe	115	(case value
1ce06bbe	116	,@(%map-enum args :int-quoted-symbol)))
f463115b	117	(defmethod to-alien-form (form (type (eql ',name)) &rest args)
	118	(declare (ignore type args))
	119	(list ',enum-int form))
	120	(defmethod from-alien-form (form (type (eql ',name)) &rest args)
	121	(declare (ignore type args))
	122	(list ',int-enum form))
	123	(defmethod to-alien-function ((type (eql ',name)) &rest args)
	124	(declare (ignore type args))
	125	#',enum-int)
	126	(defmethod from-alien-function ((type (eql ',name)) &rest args)
	127	(declare (ignore type args))
	128	#',int-enum)
	129	(defmethod writer-function ((type (eql ',name)) &rest args)
	130	(declare (ignore type args))
	131	(let ((writer (writer-function 'signed)))
	132	#'(lambda (enum location &optional (offset 0))
	133	(funcall writer (,enum-int enum) location offset))))
	134	(defmethod reader-function ((type (eql ',name)) &rest args)
	135	(declare (ignore type args))
	136	(let ((reader (reader-function 'signed)))
	137	#'(lambda (location &optional (offset 0))
	138	(,int-enum (funcall reader location offset))))))))
	139
	140
6baf860c	141	;;;; Generic flags type
b44caf77	142
564b73ea	143	(defun %map-flags (mappings op)
	144	(loop
	145	as value = 1 then (ash value 1)
	146	for mapping in mappings
	147	collect (let ((symbol (if (atom mapping) mapping (first mapping))))
	148	(unless (atom mapping)
	149	(setq value (second mapping)))
	150	(ecase op
1ce06bbe	151	(:symbol-int `(,symbol ,value))
1ce06bbe	152	(:int-symbol `(,value ,symbol))
564b73ea	153	(:symbols symbol)))))
564b73ea	154
b44caf77	155	(deftype flags (&rest args)
564b73ea	156	`(or (member ,@(%map-flags args :symbols)) list))
6baf860c	157
	158	(defmethod alien-type ((type (eql 'flags)) &rest args)
	159	(declare (ignore type args))
	160	(alien-type 'unsigned))
	161
	162	(defmethod size-of ((type (eql 'flags)) &rest args)
	163	(declare (ignore type args))
	164	(size-of 'unsigned))
	165
	166	(defmethod to-alien-form (flags (type (eql 'flags)) &rest args)
564b73ea	167	`(reduce #'logior (mklist ,flags)
	168	:key #'(lambda (flag)
	169	(case flag
	170	,@(%map-flags args :symbol-int)
	171	(t (error 'type-error :datum ,flags
	172	:expected-type '(,type ,@args)))))))
6baf860c	173
688630cc	174	(defmethod from-alien-form (value (type (eql 'flags)) &rest args)
6baf860c	175	(declare (ignore type))
6baf860c	176	`(loop
688630cc	177	for (int symbol) in ',(%map-flags args :int-symbol)
	178	when (= (logand ,value int) int)
	179	collect symbol))
6baf860c	180
6baf860c	181	(defmethod to-alien-function ((type (eql 'flags)) &rest args)
564b73ea	182	(declare (ignore type))
	183	(let ((mappings (%map-flags args :symbol-int)))
	184	#'(lambda (flags)
	185	(reduce #'logior (mklist flags)
	186	:key #'(lambda (flag)
	187	(or
	188	(second (assoc flag mappings))
	189	(error 'type-error :datum flags
	190	:expected-type (cons 'flags args))))))))
6baf860c	191
	192	(defmethod from-alien-function ((type (eql 'flags)) &rest args)
	193	(declare (ignore type))
564b73ea	194	(let ((mappings (%map-flags args :int-symbol)))
688630cc	195	#'(lambda (value)
6baf860c	196	(loop
688630cc	197	for (int symbol) in mappings
	198	when (= (logand value int) int)
	199	collect symbol))))
6baf860c	200
	201	(defmethod writer-function ((type (eql 'flags)) &rest args)
	202	(declare (ignore type))
	203	(let ((writer (writer-function 'unsigned))
	204	(function (apply #'to-alien-function 'flags args)))
	205	#'(lambda (flags location &optional (offset 0))
	206	(funcall writer (funcall function flags) location offset))))
	207
	208	(defmethod reader-function ((type (eql 'flags)) &rest args)
	209	(declare (ignore type))
	210	(let ((reader (reader-function 'unsigned))
	211	(function (apply #'from-alien-function 'flags args)))
	212	#'(lambda (location &optional (offset 0))
	213	(funcall function (funcall reader location offset)))))
	214
	215
f463115b	216	;;;; Named flags types
3a935dfa	217
f463115b	218	(defmacro define-flags-type (name &rest args)
f463115b	219	(let ((flags-int (intern (format nil "~A-TO-INT" name)))
564b73ea	220	(int-flags (intern (format nil "INT-TO-~A" name)))
564b73ea	221	(satisfies (intern (format nil "~A-P" name))))
f463115b	222	`(progn
564b73ea	223	(deftype ,name () '(satisfies ,satisfies))
	224	(defun ,satisfies (object)
	225	(flet ((valid-p (ob)
	226	(find ob ',(%map-flags args :symbols))))
	227	(typecase object
	228	(symbol (valid-p object))
	229	(list (every #'valid-p object)))))
	230	(defun ,flags-int (flags)
	231	(reduce #'logior (mklist flags)
	232	:key #'(lambda (flag)
	233	(case flag
	234	,@(%map-flags args :symbol-int)
	235	(t (error 'type-error :datum flags
	236	:expected-type ',name))))))
f463115b	237	(defun ,int-flags (value)
564b73ea	238	(loop
688630cc	239	for (int symbol) in ',(%map-flags args :int-symbol)
	240	when(= (logand value int) int)
	241	collect symbol))
564b73ea	242	(defmethod alien-type ((type (eql ',name)) &rest args)
	243	(declare (ignore type args))
	244	(alien-type 'flags))
	245	(defmethod size-of ((type (eql ',name)) &rest args)
	246	(declare (ignore type args))
	247	(size-of 'flags))
f463115b	248	(defmethod to-alien-form (form (type (eql ',name)) &rest args)
	249	(declare (ignore type args))
	250	(list ',flags-int form))
	251	(defmethod from-alien-form (form (type (eql ',name)) &rest args)
	252	(declare (ignore type args))
	253	(list ',int-flags form))
	254	(defmethod to-alien-function ((type (eql ',name)) &rest args)
	255	(declare (ignore type args))
	256	#',flags-int)
	257	(defmethod from-alien-function ((type (eql ',name)) &rest args)
	258	(declare (ignore type args))
	259	#',int-flags)
	260	(defmethod writer-function ((type (eql ',name)) &rest args)
	261	(declare (ignore type args))
	262	(let ((writer (writer-function 'signed)))
	263	#'(lambda (flags location &optional (offset 0))
	264	(funcall writer (,flags-int flags) location offset))))
	265	(defmethod reader-function ((type (eql ',name)) &rest args)
	266	(declare (ignore type args))
	267	(let ((reader (reader-function 'signed)))
	268	#'(lambda (location &optional (offset 0))
	269	(,int-flags (funcall reader location offset))))))))
	270
	271
	272
	273	;;;; Type definition by introspection
3a935dfa	274
564b73ea	275	(defun %query-enum-or-flags-values (query-function class type)
	276	(multiple-value-bind (sap length)
	277	(funcall query-function (type-class-ref type))
	278	(let ((values nil)
	279	(size (proxy-instance-size (find-class class)))
	280	(proxy (make-instance class :location sap)))
	281	(dotimes (i length)
	282	(with-slots (location nickname value) proxy
	283	(setf location sap)
	284	(setq sap (sap+ sap size))
	285	(push
	286	(list
	287	(intern (substitute #\- #\_ (string-upcase nickname)) "KEYWORD")
	288	value)
	289	values)))
	290	values)))
	291
	292
	293	(defclass %enum-value (struct)
	294	((value :allocation :alien :type int)
	295	(name :allocation :alien :type string)
	296	(nickname :allocation :alien :type string))
	297	(:metaclass static-struct-class))
	298
	299	(defbinding %enum-class-values () pointer
	300	(class pointer)
	301	(n-values unsigned-int :out))
	302
	303	(defun query-enum-values (type)
	304	(%query-enum-or-flags-values #'%enum-class-values '%enum-value type))
	305
	306
	307	(defclass %flags-value (struct)
	308	((value :allocation :alien :type unsigned-int)
	309	(name :allocation :alien :type string)
	310	(nickname :allocation :alien :type string))
	311	(:metaclass static-struct-class))
	312
	313	(defbinding %flags-class-values () pointer
	314	(class pointer)
	315	(n-values unsigned-int :out))
	316
	317	(defun query-flags-values (type)
	318	(%query-enum-or-flags-values #'%flags-class-values '%flags-value type))
	319
	320
e9934f39	321	(defun expand-enum-type (type-number forward-p options)
145300db	322	(declare (ignore forward-p))
3a935dfa	323	(let* ((super (supertype type-number))
3a935dfa	324	(type (type-from-number type-number))
6895c081	325	(mappings (getf options :mappings))
3a935dfa	326	(expanded-mappings
	327	(append
	328	(delete-if
	329	#'(lambda (mapping)
	330	(or
	331	(assoc (first mapping) mappings)
	332	(rassoc (cdr mapping) mappings :test #'equal)))
	333	(if (eq super 'enum)
	334	(query-enum-values type-number)
	335	(query-flags-values type-number)))
	336	(remove-if
	337	#'(lambda (mapping) (eq (second mapping) nil)) mappings))))
	338	`(progn
dcb31db6	339	(register-type ',type ',(find-type-init-function type-number))
f463115b	340	,(ecase super
	341	(enum `(define-enum-type ,type ,@expanded-mappings))
	342	(flags `(define-flags-type ,type ,@expanded-mappings))))))
3a935dfa	343
3a935dfa	344
6895c081	345	(register-derivable-type 'enum "GEnum" 'expand-enum-type)
6895c081	346	(register-derivable-type 'flags "GFlags" 'expand-enum-type)
b44caf77	347