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 1.21 2004-12-09 23:31:50 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 ;;;; Quarks
  76
  77 (internal *quark-counter* *quark-from-object* *quark-to-object*)
  78
  79 (deftype quark () 'unsigned)
  80
  81 ;(defbinding %quark-get-reserved () quark)
  82
  83 (defbinding %quark-from-string () quark
  84   (string string))
  85
  86 (defvar *quark-counter* 0)
  87
  88 (defun %quark-get-reserved ()
  89   ;; The string is just a dummy
  90   (%quark-from-string (format nil "#@£$%&-quark-~D" (incf *quark-counter*))))
  91
  92 (defvar *quark-from-object* (make-hash-table))
  93 (defvar *quark-to-object* (make-hash-table))
  94
  95 (defun quark-from-object (object &key (test #'eq))
  96   (let ((hash-code (sxhash object)))
  97     (or
  98      (assoc-ref object (gethash hash-code *quark-from-object*) :test test)
  99      (let ((quark (%quark-get-reserved)))
 100        (setf
 101         (gethash hash-code *quark-from-object*)
 102         (append
 103          (gethash hash-code *quark-from-object*)
 104          (list (cons object quark))))
 105        (setf (gethash quark *quark-to-object*) object)
 106        quark))))
 107
 108 (defun quark-to-object (quark)
 109   (gethash quark *quark-to-object*))
 110
 111 (defun remove-quark (quark)
 112   (let* ((object (gethash quark *quark-to-object*))
 113          (hash-code (sxhash object)))
 114     (remhash quark *quark-to-object*)
 115     (unless (setf
 116              (gethash hash-code *quark-from-object*)
 117              (assoc-delete object (gethash hash-code *quark-from-object*)))
 118       (remhash hash-code *quark-from-object*))))
 119
 120
 121
 122 ;;;; Linked list (GList)
 123
 124 (deftype glist (type)
 125   `(or (null (cons ,type list))))
 126
 127 (defbinding (%glist-append "g_list_append") () pointer
 128   (glist pointer)
 129   (nil null))
 130
 131 (defun make-glist (type list)
 132   (loop
 133    with writer = (writer-function type)
 134    for element in list
 135    as glist = (%glist-append (or glist (make-pointer 0)))
 136    do (funcall writer element glist)
 137    finally (return glist)))
 138
 139 (defun glist-next (glist)
 140   (unless (null-pointer-p glist)
 141     (sap-ref-sap glist +size-of-pointer+)))
 142
 143 ;; Also used for gslists
 144 (defun map-glist (seqtype function glist element-type)
 145   (let ((reader (reader-function element-type)))
 146     (case seqtype
 147      ((nil)
 148       (loop
 149        as tmp = glist then (glist-next tmp)
 150        until (null-pointer-p tmp)
 151        do (funcall function (funcall reader tmp))))
 152      (list
 153       (loop
 154        as tmp = glist then (glist-next tmp)
 155        until (null-pointer-p tmp)
 156        collect (funcall function (funcall reader tmp))))
 157      (t
 158       (coerce
 159        (loop
 160         as tmp = glist then (glist-next tmp)
 161         until (null-pointer-p tmp)
 162         collect (funcall function (funcall reader tmp)))
 163        seqtype)))))
 164
 165 (defbinding (glist-free "g_list_free") () nil
 166   (glist pointer))
 167
 168 (defun destroy-glist (glist element-type)
 169   (loop
 170    with destroy = (destroy-function element-type)
 171    as tmp = glist then (glist-next tmp)
 172    until (null-pointer-p tmp)
 173    do (funcall destroy tmp 0))
 174   (glist-free glist))
 175
 176 (defmethod alien-type ((type (eql 'glist)) &rest args)
 177   (declare (ignore type args))
 178   (alien-type 'pointer))
 179
 180 (defmethod size-of ((type (eql 'glist)) &rest args)
 181   (declare (ignore type args))
 182   (size-of 'pointer))
 183
 184 (defmethod to-alien-form (list (type (eql 'glist)) &rest args)
 185   (declare (ignore type))
 186   (destructuring-bind (element-type) args
 187     `(make-glist ',element-type ,list)))
 188
 189 (defmethod to-alien-function ((type (eql 'glist)) &rest args)
 190   (declare (ignore type))
 191   (destructuring-bind (element-type) args
 192     #'(lambda (list)
 193         (make-glist element-type list))))
 194
 195 (defmethod from-alien-form (glist (type (eql 'glist)) &rest args)
 196   (declare (ignore type))
 197   (destructuring-bind (element-type) args
 198     `(let ((glist ,glist))
 199       (unwind-protect
 200            (map-glist 'list #'identity glist ',element-type)
 201         (destroy-glist glist ',element-type)))))
 202
 203 (defmethod from-alien-function ((type (eql 'glist)) &rest args)
 204   (declare (ignore type))
 205   (destructuring-bind (element-type) args
 206     #'(lambda (glist)
 207         (unwind-protect
 208              (map-glist 'list #'identity glist element-type)
 209           (destroy-glist glist element-type)))))
 210
 211 (defmethod copy-from-alien-form (glist (type (eql 'glist)) &rest args)
 212   (declare (ignore type))
 213   (destructuring-bind (element-type) args
 214     `(map-glist 'list #'identity ,glist ',element-type)))
 215
 216 (defmethod copy-from-alien-function ((type (eql 'glist)) &rest args)
 217   (declare (ignore type))
 218   (destructuring-bind (element-type) args
 219     #'(lambda (glist)
 220         (map-glist 'list #'identity glist element-type))))
 221
 222 (defmethod cleanup-form (glist (type (eql 'glist)) &rest args)
 223   (declare (ignore type))
 224   (destructuring-bind (element-type) args
 225     `(destroy-glist ,glist ',element-type)))
 226
 227 (defmethod cleanup-function ((type (eql 'glist)) &rest args)
 228   (declare (ignore type args))
 229   (destructuring-bind (element-type) args
 230     #'(lambda (glist)
 231         (destroy-glist glist element-type))))
 232
 233
 234 ;;;; Single linked list (GSList)
 235
 236 (deftype gslist (type) `(or (null (cons ,type list))))
 237
 238 (defbinding (%gslist-prepend "g_slist_prepend") () pointer
 239   (gslist pointer)
 240   (nil null))
 241
 242 (defun make-gslist (type list)
 243   (loop
 244    with writer = (writer-function type)
 245    for element in (reverse list)
 246    as gslist = (%gslist-prepend (or gslist (make-pointer 0)))
 247    do (funcall writer element gslist)
 248    finally (return gslist)))
 249
 250 (defbinding (gslist-free "g_slist_free") () nil
 251   (gslist pointer))
 252
 253 (defun destroy-gslist (gslist element-type)
 254   (loop
 255    with destroy = (destroy-function element-type)
 256    as tmp = gslist then (glist-next tmp)
 257    until (null-pointer-p tmp)
 258    do (funcall destroy tmp 0))
 259   (gslist-free gslist))
 260
 261 (defmethod alien-type ((type (eql 'gslist)) &rest args)
 262   (declare (ignore type args))
 263   (alien-type 'pointer))
 264
 265 (defmethod size-of ((type (eql 'gslist)) &rest args)
 266   (declare (ignore type args))
 267   (size-of 'pointer))
 268
 269 (defmethod to-alien-form (list (type (eql 'gslist)) &rest args)
 270   (declare (ignore type))
 271   (destructuring-bind (element-type) args
 272     `(make-sglist ',element-type ,list)))
 273
 274 (defmethod to-alien-function ((type (eql 'gslist)) &rest args)
 275   (declare (ignore type))
 276   (destructuring-bind (element-type) args
 277     #'(lambda (list)
 278         (make-gslist element-type list))))
 279
 280 (defmethod from-alien-form (gslist (type (eql 'gslist)) &rest args)
 281   (declare (ignore type))
 282   (destructuring-bind (element-type) args
 283     `(let ((gslist ,gslist))
 284       (unwind-protect
 285            (map-glist 'list #'identity gslist ',element-type)
 286         (destroy-gslist gslist ',element-type)))))
 287
 288 (defmethod from-alien-function ((type (eql 'gslist)) &rest args)
 289   (declare (ignore type))
 290   (destructuring-bind (element-type) args
 291     #'(lambda (gslist)
 292         (unwind-protect
 293              (map-glist 'list #'identity gslist element-type)
 294           (destroy-gslist gslist element-type)))))
 295
 296 (defmethod copy-from-alien-form (gslist (type (eql 'gslist)) &rest args)
 297   (declare (ignore type))
 298   (destructuring-bind (element-type) args
 299     `(map-glist 'list #'identity ,gslist ',element-type)))
 300
 301 (defmethod from-alien-function ((type (eql 'gslist)) &rest args)
 302   (declare (ignore type))
 303   (destructuring-bind (element-type) args
 304     #'(lambda (gslist)
 305         (map-glist 'list #'identity gslist element-type))))
 306
 307 (defmethod cleanup-form (gslist (type (eql 'gslist)) &rest args)
 308   (declare (ignore type args))
 309   (destructuring-bind (element-type) args
 310     `(destroy-gslist ,gslist ',element-type)))
 311
 312 (defmethod cleanup-function ((type (eql 'gslist)) &rest args)
 313   (declare (ignore type args))
 314   (destructuring-bind (element-type) args
 315     #'(lambda (gslist)
 316         (destroy-gslist gslist element-type))))
 317
 318
 319
 320 ;;; Vector
 321
 322 (defun make-c-vector (type length &optional content location)
 323   (let* ((size-of-type (size-of type))
 324          (location (or location (allocate-memory (* size-of-type length))))
 325          (writer (writer-function type)))
 326     (etypecase content
 327       (vector
 328        (loop
 329         for element across content
 330         for i from 0 below length
 331         as offset = 0 then (+ offset size-of-type)
 332         do (funcall writer element location offset)))
 333       (list
 334        (loop
 335         for element in content
 336         for i from 0 below length
 337         as offset = 0 then (+ offset size-of-type)
 338         do (funcall writer element location offset))))
 339     location))
 340
 341
 342 (defun map-c-vector (seqtype function location element-type length)
 343   (let ((reader (reader-function element-type))
 344         (size-of-element (size-of element-type)))
 345     (case seqtype
 346      ((nil)
 347       (loop
 348        for i from 0 below length
 349        as offset = 0 then (+ offset size-of-element)
 350        do (funcall function (funcall reader location offset))))
 351      (list
 352       (loop
 353        for i from 0 below length
 354        as offset = 0 then (+ offset size-of-element)
 355        collect (funcall function (funcall reader location offset))))
 356      (t
 357       (loop
 358        with sequence = (make-sequence seqtype length)
 359        for i from 0 below length
 360        as offset = 0 then (+ offset size-of-element)
 361        do (setf
 362            (elt sequence i)
 363            (funcall function (funcall reader location offset)))
 364        finally (return sequence))))))
 365
 366
 367 (defun destroy-c-vector (location element-type length)
 368   (loop
 369    with destroy = (destroy-function element-type)
 370    with element-size = (size-of element-type)
 371    for i from 0 below length
 372    as offset = 0 then (+ offset element-size)
 373    do (funcall destroy location offset))
 374   (deallocate-memory location))
 375
 376
 377 (defmethod alien-type ((type (eql 'vector)) &rest args)
 378   (declare (ignore type args))
 379   (alien-type 'pointer))
 380
 381 (defmethod size-of ((type (eql 'vector)) &rest args)
 382   (declare (ignore type args))
 383   (size-of 'pointer))
 384
 385 (defmethod to-alien-form (vector (type (eql 'vector)) &rest args)
 386   (declare (ignore type))
 387   (destructuring-bind (element-type &optional (length '*)) args
 388     (if (eq length '*)
 389         `(let* ((vector ,vector)
 390                 (location (sap+
 391                            (allocate-memory (+ ,+size-of-int+
 392                                                (* ,(size-of element-type)
 393                                                   (length vector))))
 394                            ,+size-of-int+)))
 395           (make-c-vector ',element-type (length vector) vector location)
 396           (setf (sap-ref-32 location ,(- +size-of-int+)) (length vector))
 397           location)
 398       `(make-c-vector ',element-type ,length ,vector))))
 399
 400 (defmethod from-alien-form (c-vector (type (eql 'vector)) &rest args)
 401   (declare (ignore type))
 402   (destructuring-bind (element-type &optional (length '*)) args
 403     (if (eq length '*)
 404         (error "Can't use vector of variable size as return type")
 405       `(let ((c-vector ,c-vector))
 406         (prog1
 407             (map-c-vector 'vector #'identity ',element-type ,length c-vector)
 408           (destroy-c-vector c-vector ',element-type ,length))))))
 409
 410 (defmethod copy-from-alien-form (c-vector (type (eql 'vector)) &rest args)
 411   (declare (ignore type))
 412   (destructuring-bind (element-type &optional (length '*)) args
 413     (if (eq length '*)
 414         (error "Can't use vector of variable size as return type")
 415       `(map-c-vector 'vector #'identity ',element-type ',length ,c-vector))))
 416
 417 (defmethod cleanup-form (location (type (eql 'vector)) &rest args)
 418   (declare (ignore type))
 419   (destructuring-bind (element-type &optional (length '*)) args
 420     `(let* ((location ,location)
 421             (length ,(if (eq length '*)
 422                          `(sap-ref-32 location ,(- +size-of-int+))
 423                          length)))
 424       (loop
 425        with destroy = (destroy-function ',element-type)
 426        for i from 0 below length
 427        as offset = 0 then (+ offset ,(size-of element-type))
 428        do (funcall destroy location offset))
 429       (deallocate-memory ,(if (eq length '*)
 430                               `(sap+ location  ,(- +size-of-int+))
 431                             'location)))))
 432
 433 (defmethod writer-function ((type (eql 'vector)) &rest args)
 434   (declare (ignore type))
 435   (destructuring-bind (element-type &optional (length '*)) args
 436     #'(lambda (vector location &optional (offset 0))
 437         (setf
 438          (sap-ref-sap location offset)
 439          (make-c-vector element-type length vector)))))
 440
 441 (defmethod reader-function ((type (eql 'vector)) &rest args)
 442   (declare (ignore type))
 443   (destructuring-bind (element-type &optional (length '*)) args
 444     (if (eq length '*)
 445         (error "Can't create reader function for vector of variable size")
 446       #'(lambda (location &optional (offset 0))
 447           (unless (null-pointer-p (sap-ref-sap location offset))
 448             (map-c-vector 'vector #'identity (sap-ref-sap location offset)
 449              element-type length))))))
 450
 451 (defmethod destroy-function ((type (eql 'vector)) &rest args)
 452   (declare (ignore type))
 453   (destructuring-bind (element-type &optional (length '*)) args
 454     (if (eq length '*)
 455         (error "Can't create destroy function for vector of variable size")
 456       #'(lambda (location &optional (offset 0))
 457           (unless (null-pointer-p (sap-ref-sap location offset))
 458             (destroy-c-vector
 459              (sap-ref-sap location offset) element-type length)
 460             (setf (sap-ref-sap location offset) (make-pointer 0)))))))