mdw@git.distorted.org.uk Git - clg/blob - glib/glib.lisp

   1 ;; Common Lisp bindings for GTK+ v1.2.x
   2 ;; Copyright (C) 1999 Espen S. Johnsen <espejohn@online.no>
   3 ;;
   4 ;; This library is free software; you can redistribute it and/or
   5 ;; modify it under the terms of the GNU Lesser General Public
   6 ;; License as published by the Free Software Foundation; either
   7 ;; version 2 of the License, or (at your option) any later version.
   8 ;;
   9 ;; This library is distributed in the hope that it will be useful,
  10 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 ;; Lesser General Public License for more details.
  13 ;;
  14 ;; You should have received a copy of the GNU Lesser General Public
  15 ;; License along with this library; if not, write to the Free Software
  16 ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17
  18 ;; $Id: glib.lisp,v 1.16 2004-11-06 21:39:58 espen Exp $
  19
  20
  21 (in-package "GLIB")
  22
  23 (use-prefix "g")
  24
  25
  26 ;;;; Memory management
  27
  28 (defbinding (allocate-memory "g_malloc0") () pointer
  29   (size unsigned-long))
  30
  31 (defbinding (reallocate-memory "g_realloc") () pointer
  32   (address pointer)
  33   (size unsigned-long))
  34
  35 (defbinding (deallocate-memory "g_free") () nil
  36   (address pointer))
  37 ;; (defun deallocate-memory (address)
  38 ;;   (declare (ignore address)))
  39
  40 (defun copy-memory (from length &optional (to (allocate-memory length)))
  41   (kernel:system-area-copy from 0 to 0 (* 8 length))
  42   to)
  43
  44
  45 ;;;; User data mechanism
  46
  47 (internal *user-data* *user-data-count*)
  48
  49 (declaim (fixnum *user-data-count*))
  50
  51 (defvar *user-data* (make-hash-table))
  52 (defvar *user-data-count* 0)
  53
  54 (defun register-user-data (object &optional destroy-function)
  55   (check-type destroy-function (or null symbol function))
  56   (incf *user-data-count*)
  57   (setf
  58    (gethash *user-data-count* *user-data*)
  59    (cons object destroy-function))
  60   *user-data-count*)
  61
  62 (defun find-user-data (id)
  63   (check-type id fixnum)
  64   (multiple-value-bind (user-data p) (gethash id *user-data*)
  65     (values (car user-data) p)))
  66
  67 (defun destroy-user-data (id)
  68   (check-type id fixnum)
  69   (let ((user-data (gethash id *user-data*)))
  70     (when (cdr user-data)
  71       (funcall (cdr user-data) (car user-data))))
  72   (remhash id *user-data*))
  73
  74
  75
  76 ;;;; Quarks
  77
  78 (internal *quark-counter* *quark-from-object* *quark-to-object*)
  79
  80 (deftype quark () 'unsigned)
  81
  82 ;(defbinding %quark-get-reserved () quark)
  83
  84 (defbinding %quark-from-string () quark
  85   (string string))
  86
  87 (defvar *quark-counter* 0)
  88
  89 (defun %quark-get-reserved ()
  90   ;; The string is just a dummy
  91   (%quark-from-string (format nil "#@£$%&-quark-~D" (incf *quark-counter*))))
  92
  93 (defvar *quark-from-object* (make-hash-table))
  94 (defvar *quark-to-object* (make-hash-table))
  95
  96 (defun quark-from-object (object &key (test #'eq))
  97   (let ((hash-code (sxhash object)))
  98     (or
  99      (assoc-ref object (gethash hash-code *quark-from-object*) :test test)
 100      (let ((quark (%quark-get-reserved)))
 101        (setf
 102         (gethash hash-code *quark-from-object*)
 103         (append
 104          (gethash hash-code *quark-from-object*)
 105          (list (cons object quark))))
 106        (setf (gethash quark *quark-to-object*) object)
 107        quark))))
 108
 109 (defun quark-to-object (quark)
 110   (gethash quark *quark-to-object*))
 111
 112 (defun remove-quark (quark)
 113   (let* ((object (gethash quark *quark-to-object*))
 114          (hash-code (sxhash object)))
 115     (remhash quark *quark-to-object*)
 116     (unless (setf
 117              (gethash hash-code *quark-from-object*)
 118              (assoc-delete object (gethash hash-code *quark-from-object*)))
 119       (remhash hash-code *quark-from-object*))))
 120
 121
 122
 123 ;;;; Linked list (GList)
 124
 125 (deftype glist (type &key copy)
 126   (declare (ignore copy))
 127   `(or (null (cons ,type list))))
 128
 129 (defbinding (%glist-append-unsigned "g_list_append") () pointer
 130   (glist pointer)
 131   (data unsigned))
 132
 133 (defbinding (%glist-append-signed "g_list_append") () pointer
 134   (glist pointer)
 135   (data signed))
 136
 137 (defbinding (%glist-append-sap "g_list_append") () pointer
 138   (glist pointer)
 139   (data pointer))
 140
 141 (defun make-glist (type list)
 142   (let ((new-element (ecase (alien-type type)
 143                        (system-area-pointer #'%glist-append-sap)
 144                        ((signed-byte c-call:short c-call:int c-call:long)
 145                         #'%glist-append-signed)
 146                        ((unsigned-byte c-call:unsigned-short
 147                          c-call:unsigned-int c-call:unsigned-long)
 148                         #'%glist-append-unsigned)))
 149         (to-alien (to-alien-function type)))
 150     (loop
 151      for element in list
 152      as glist = (funcall new-element (or glist (make-pointer 0))
 153                  (funcall to-alien element))
 154      finally (return glist))))
 155
 156 (defun glist-next (glist)
 157   (unless (null-pointer-p glist)
 158     (sap-ref-sap glist +size-of-pointer+)))
 159
 160 ;; Also used for gslists
 161 (defun map-glist (seqtype function glist element-type)
 162   (let ((reader (reader-function element-type)))
 163     (case seqtype
 164      ((nil)
 165       (loop
 166        as tmp = glist then (glist-next tmp)
 167        until (null-pointer-p tmp)
 168        do (funcall function (funcall reader tmp))))
 169      (list
 170       (loop
 171        as tmp = glist then (glist-next tmp)
 172        until (null-pointer-p tmp)
 173        collect (funcall function (funcall reader tmp))))
 174      (t
 175       (coerce
 176        (loop
 177         as tmp = glist then (glist-next tmp)
 178         until (null-pointer-p tmp)
 179         collect (funcall function (funcall reader tmp)))
 180        seqtype)))))
 181
 182 (defbinding (glist-free "g_list_free") () nil
 183   (glist pointer))
 184
 185
 186 (defmethod alien-type ((type (eql 'glist)) &rest args)
 187   (declare (ignore type args))
 188   (alien-type 'pointer))
 189
 190 (defmethod size-of ((type (eql 'glist)) &rest args)
 191   (declare (ignore type args))
 192   (size-of 'pointer))
 193
 194 (defmethod to-alien-form (list (type (eql 'glist)) &rest args)
 195   (declare (ignore type))
 196   (destructuring-bind (element-type) args
 197     `(make-glist ',element-type ,list)))
 198
 199 (defmethod to-alien-function ((type (eql 'glist)) &rest args)
 200   (declare (ignore type args))
 201   (destructuring-bind (element-type) args
 202     #'(lambda (list)
 203         (make-glist element-type list))))
 204
 205 (defmethod from-alien-form (glist (type (eql 'glist)) &rest args)
 206   (declare (ignore type))
 207   (destructuring-bind (element-type) args
 208     `(let ((glist ,glist))
 209       (unwind-protect
 210            (map-glist 'list #'identity glist ',element-type)
 211         (glist-free glist)))))
 212
 213 (defmethod from-alien-function ((type (eql 'glist)) &rest args)
 214   (declare (ignore type))
 215   (destructuring-bind (element-type) args
 216     #'(lambda (glist)
 217         (unwind-protect
 218              (map-glist 'list #'identity glist element-type)
 219           (glist-free glist)))))
 220
 221 (defmethod cleanup-form (glist (type (eql 'glist)) &rest args)
 222   (declare (ignore type args))
 223   `(glist-free ,glist))
 224
 225 (defmethod cleanup-function ((type (eql 'glist)) &rest args)
 226   (declare (ignore type args))
 227   #'glist-free)
 228
 229
 230
 231 ;;;; Single linked list (GSList)
 232
 233 (deftype gslist (type) `(or (null (cons ,type list))))
 234
 235 (defbinding (%gslist-prepend-unsigned "g_slist_prepend") () pointer
 236   (gslist pointer)
 237   (data unsigned))
 238
 239 (defbinding (%gslist-prepend-signed "g_slist_prepend") () pointer
 240   (gslist pointer)
 241   (data signed))
 242
 243 (defbinding (%gslist-prepend-sap "g_slist_prepend") () pointer
 244   (gslist pointer)
 245   (data pointer))
 246
 247 (defun make-gslist (type list)
 248   (let ((new-element (ecase (alien-type type)
 249                        (system-area-pointer #'%gslist-prepend-sap)
 250                        ((signed-byte c-call:short c-call:int c-call:long)
 251                         #'%gslist-prepend-signed)
 252                        ((unsigned-byte c-call:unsigned-short
 253                          c-call:unsigned-int c-call:unsigned-long)
 254                         #'%gslist-prepend-unsigned)))
 255         (to-alien (to-alien-function type)))
 256     (loop
 257      for element in (reverse list)
 258      as gslist = (funcall new-element (or gslist (make-pointer 0))
 259                   (funcall to-alien element))
 260      finally (return gslist))))
 261
 262 (defbinding (gslist-free "g_slist_free") () nil
 263   (gslist pointer))
 264
 265
 266 (defmethod alien-type ((type (eql 'gslist)) &rest args)
 267   (declare (ignore type args))
 268   (alien-type 'pointer))
 269
 270 (defmethod size-of ((type (eql 'gslist)) &rest args)
 271   (declare (ignore type args))
 272   (size-of 'pointer))
 273
 274 (defmethod to-alien-form (list (type (eql 'gslist)) &rest args)
 275   (declare (ignore type))
 276   (destructuring-bind (element-type) args
 277     `(make-sglist ',element-type ,list)))
 278
 279 (defmethod to-alien-function ((type (eql 'gslist)) &rest args)
 280   (declare (ignore type args))
 281   (destructuring-bind (element-type) args
 282     #'(lambda (list)
 283         (make-gslist element-type list))))
 284
 285 (defmethod from-alien-form (gslist (type (eql 'gslist)) &rest args)
 286   (declare (ignore type))
 287   (destructuring-bind (element-type) args
 288     `(let ((gslist ,gslist))
 289       (unwind-protect
 290            (map-glist 'list #'identity gslist ',element-type)
 291         (gslist-free gslist)))))
 292
 293 (defmethod from-alien-function ((type (eql 'gslist)) &rest args)
 294   (declare (ignore type))
 295   (destructuring-bind (element-type) args
 296     #'(lambda (gslist)
 297         (unwind-protect
 298              (map-glist 'list #'identity gslist element-type)
 299           (gslist-free gslist)))))
 300
 301 (defmethod cleanup-form (list (type (eql 'gslist)) &rest args)
 302   (declare (ignore type args))
 303   `(gslist-free ,list))
 304
 305 (defmethod cleanup-function ((type (eql 'gslist)) &rest args)
 306   (declare (ignore type args))
 307   #'gslist-free)
 308
 309
 310
 311 ;;; Vector
 312
 313 (defun make-c-vector (type length &optional content location)
 314   (let* ((size-of-type (size-of type))
 315          (location (or location (allocate-memory (* size-of-type length))))
 316          (writer (writer-function type)))
 317     (loop
 318      for element across content
 319      for i from 0 below length
 320      as offset = 0 then (+ offset size-of-type)
 321      do (funcall writer element location offset))
 322     location))
 323
 324
 325 (defun map-c-vector (seqtype function location element-type length)
 326   (let ((reader (reader-function element-type))
 327         (size-of-element (size-of element-type)))
 328     (case seqtype
 329      ((nil)
 330       (loop
 331        for i from 0 below length
 332        as offset = 0 then (+ offset size-of-element)
 333        do (funcall function (funcall reader location offset))))
 334      (list
 335       (loop
 336        for i from 0 below length
 337        as offset = 0 then (+ offset size-of-element)
 338        collect (funcall function (funcall reader location offset))))
 339      (t
 340       (loop
 341        with sequence = (make-sequence seqtype length)
 342        for i from 0 below length
 343        as offset = 0 then (+ offset size-of-element)
 344        do (setf
 345            (elt sequence i)
 346            (funcall function (funcall reader location offset)))
 347        finally (return sequence))))))
 348
 349
 350 (defmethod alien-type ((type (eql 'vector)) &rest args)
 351   (declare (ignore type args))
 352   (alien-type 'pointer))
 353
 354 (defmethod size-of ((type (eql 'vector)) &rest args)
 355   (declare (ignore type args))
 356   (size-of 'pointer))
 357
 358 (defmethod to-alien-form (vector (type (eql 'vector)) &rest args)
 359   (declare (ignore type))
 360   (destructuring-bind (element-type &optional (length '*)) args
 361     (if (eq length '*)
 362         `(let* ((vector ,vector)
 363                 (location (sap+
 364                            (allocate-memory (+ ,+size-of-int+
 365                                                (* ,(size-of element-type)
 366                                                   (length vector))))
 367                            ,+size-of-int+)))
 368           (make-c-vector ',element-type (length vector) vector location)
 369           (setf (sap-ref-32 location ,(- +size-of-int+)) (length vector))
 370           location)
 371       `(make-c-vector ',element-type ,length ,vector))))
 372
 373 (defmethod from-alien-form (location (type (eql 'vector)) &rest args)
 374   (declare (ignore type))
 375   (destructuring-bind (element-type &optional (length '*)) args
 376     (if (eq length '*)
 377         (error "Can't use vector of variable size as return type")
 378       `(map-c-vector 'vector #'identity ',element-type ',length ,location))))
 379
 380 (defmethod cleanup-form (location (type (eql 'vector)) &rest args)
 381   (declare (ignore type))
 382   (destructuring-bind (element-type &optional (length '*)) args
 383     `(let* ((location ,location)
 384             (length ,(if (eq length '*)
 385                          `(sap-ref-32 location ,(- +size-of-int+))
 386                          length)))
 387       (loop
 388        with destroy = (destroy-function ',element-type)
 389        for i from 0 below length
 390        as offset = 0 then (+ offset ,(size-of element-type))
 391        do (funcall destroy location offset))
 392       (deallocate-memory ,(if (eq length '*)
 393                               `(sap+ location  ,(- +size-of-int+))
 394                             'location)))))