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 1.18 2004-11-07 16:03:55 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 &key copy)
 125   (declare (ignore copy))
 126   `(or (null (cons ,type list))))
 127
 128 (defbinding (%glist-append-unsigned "g_list_append") () pointer
 129   (glist pointer)
 130   (data unsigned))
 131
 132 (defbinding (%glist-append-signed "g_list_append") () pointer
 133   (glist pointer)
 134   (data signed))
 135
 136 (defbinding (%glist-append-sap "g_list_append") () pointer
 137   (glist pointer)
 138   (data pointer))
 139
 140 (defun make-glist (type list)
 141   (let ((new-element (ecase (alien-type type)
 142                        (system-area-pointer #'%glist-append-sap)
 143                        ((signed-byte c-call:short c-call:int c-call:long)
 144                         #'%glist-append-signed)
 145                        ((unsigned-byte c-call:unsigned-short
 146                          c-call:unsigned-int c-call:unsigned-long)
 147                         #'%glist-append-unsigned)))
 148         (to-alien (to-alien-function type)))
 149     (loop
 150      for element in list
 151      as glist = (funcall new-element (or glist (make-pointer 0))
 152                  (funcall to-alien element))
 153      finally (return glist))))
 154
 155 (defun glist-next (glist)
 156   (unless (null-pointer-p glist)
 157     (sap-ref-sap glist +size-of-pointer+)))
 158
 159 ;; Also used for gslists
 160 (defun map-glist (seqtype function glist element-type)
 161   (let ((reader (reader-function element-type)))
 162     (case seqtype
 163      ((nil)
 164       (loop
 165        as tmp = glist then (glist-next tmp)
 166        until (null-pointer-p tmp)
 167        do (funcall function (funcall reader tmp))))
 168      (list
 169       (loop
 170        as tmp = glist then (glist-next tmp)
 171        until (null-pointer-p tmp)
 172        collect (funcall function (funcall reader tmp))))
 173      (t
 174       (coerce
 175        (loop
 176         as tmp = glist then (glist-next tmp)
 177         until (null-pointer-p tmp)
 178         collect (funcall function (funcall reader tmp)))
 179        seqtype)))))
 180
 181 (defbinding (glist-free "g_list_free") () nil
 182   (glist pointer))
 183
 184
 185 (defmethod alien-type ((type (eql 'glist)) &rest args)
 186   (declare (ignore type args))
 187   (alien-type 'pointer))
 188
 189 (defmethod size-of ((type (eql 'glist)) &rest args)
 190   (declare (ignore type args))
 191   (size-of 'pointer))
 192
 193 (defmethod to-alien-form (list (type (eql 'glist)) &rest args)
 194   (declare (ignore type))
 195   (destructuring-bind (element-type) args
 196     `(make-glist ',element-type ,list)))
 197
 198 (defmethod to-alien-function ((type (eql 'glist)) &rest args)
 199   (declare (ignore type))
 200   (destructuring-bind (element-type) args
 201     #'(lambda (list)
 202         (make-glist element-type list))))
 203
 204 (defmethod from-alien-form (glist (type (eql 'glist)) &rest args)
 205   (declare (ignore type))
 206   (destructuring-bind (element-type) args
 207     `(let ((glist ,glist))
 208       (unwind-protect
 209            (map-glist 'list #'identity glist ',element-type)
 210         (glist-free glist)))))
 211
 212 (defmethod from-alien-function ((type (eql 'glist)) &rest args)
 213   (declare (ignore type))
 214   (destructuring-bind (element-type) args
 215     #'(lambda (glist)
 216         (unwind-protect
 217              (map-glist 'list #'identity glist element-type)
 218           (glist-free glist)))))
 219
 220 (defmethod cleanup-form (glist (type (eql 'glist)) &rest args)
 221   (declare (ignore type args))
 222   `(glist-free ,glist))
 223
 224 (defmethod cleanup-function ((type (eql 'glist)) &rest args)
 225   (declare (ignore type args))
 226   #'glist-free)
 227
 228
 229
 230 ;;;; Single linked list (GSList)
 231
 232 (deftype gslist (type) `(or (null (cons ,type list))))
 233
 234 (defbinding (%gslist-prepend-unsigned "g_slist_prepend") () pointer
 235   (gslist pointer)
 236   (data unsigned))
 237
 238 (defbinding (%gslist-prepend-signed "g_slist_prepend") () pointer
 239   (gslist pointer)
 240   (data signed))
 241
 242 (defbinding (%gslist-prepend-sap "g_slist_prepend") () pointer
 243   (gslist pointer)
 244   (data pointer))
 245
 246 (defun make-gslist (type list)
 247   (let ((new-element (ecase (alien-type type)
 248                        (system-area-pointer #'%gslist-prepend-sap)
 249                        ((signed-byte c-call:short c-call:int c-call:long)
 250                         #'%gslist-prepend-signed)
 251                        ((unsigned-byte c-call:unsigned-short
 252                          c-call:unsigned-int c-call:unsigned-long)
 253                         #'%gslist-prepend-unsigned)))
 254         (to-alien (to-alien-function type)))
 255     (loop
 256      for element in (reverse list)
 257      as gslist = (funcall new-element (or gslist (make-pointer 0))
 258                   (funcall to-alien element))
 259      finally (return gslist))))
 260
 261 (defbinding (gslist-free "g_slist_free") () nil
 262   (gslist pointer))
 263
 264
 265 (defmethod alien-type ((type (eql 'gslist)) &rest args)
 266   (declare (ignore type args))
 267   (alien-type 'pointer))
 268
 269 (defmethod size-of ((type (eql 'gslist)) &rest args)
 270   (declare (ignore type args))
 271   (size-of 'pointer))
 272
 273 (defmethod to-alien-form (list (type (eql 'gslist)) &rest args)
 274   (declare (ignore type))
 275   (destructuring-bind (element-type) args
 276     `(make-sglist ',element-type ,list)))
 277
 278 (defmethod to-alien-function ((type (eql 'gslist)) &rest args)
 279   (declare (ignore type))
 280   (destructuring-bind (element-type) args
 281     #'(lambda (list)
 282         (make-gslist element-type list))))
 283
 284 (defmethod from-alien-form (gslist (type (eql 'gslist)) &rest args)
 285   (declare (ignore type))
 286   (destructuring-bind (element-type) args
 287     `(let ((gslist ,gslist))
 288       (unwind-protect
 289            (map-glist 'list #'identity gslist ',element-type)
 290         (gslist-free gslist)))))
 291
 292 (defmethod from-alien-function ((type (eql 'gslist)) &rest args)
 293   (declare (ignore type))
 294   (destructuring-bind (element-type) args
 295     #'(lambda (gslist)
 296         (unwind-protect
 297              (map-glist 'list #'identity gslist element-type)
 298           (gslist-free gslist)))))
 299
 300 (defmethod cleanup-form (list (type (eql 'gslist)) &rest args)
 301   (declare (ignore type args))
 302   `(gslist-free ,list))
 303
 304 (defmethod cleanup-function ((type (eql 'gslist)) &rest args)
 305   (declare (ignore type args))
 306   #'gslist-free)
 307
 308
 309
 310 ;;; Vector
 311
 312 (defun make-c-vector (type length &optional content location)
 313   (let* ((size-of-type (size-of type))
 314          (location (or location (allocate-memory (* size-of-type length))))
 315          (writer (writer-function type)))
 316     (loop
 317      for element across content
 318      for i from 0 below length
 319      as offset = 0 then (+ offset size-of-type)
 320      do (funcall writer element location offset))
 321     location))
 322
 323
 324 (defun map-c-vector (seqtype function location element-type length)
 325   (let ((reader (reader-function element-type))
 326         (size-of-element (size-of element-type)))
 327     (case seqtype
 328      ((nil)
 329       (loop
 330        for i from 0 below length
 331        as offset = 0 then (+ offset size-of-element)
 332        do (funcall function (funcall reader location offset))))
 333      (list
 334       (loop
 335        for i from 0 below length
 336        as offset = 0 then (+ offset size-of-element)
 337        collect (funcall function (funcall reader location offset))))
 338      (t
 339       (loop
 340        with sequence = (make-sequence seqtype length)
 341        for i from 0 below length
 342        as offset = 0 then (+ offset size-of-element)
 343        do (setf
 344            (elt sequence i)
 345            (funcall function (funcall reader location offset)))
 346        finally (return sequence))))))
 347
 348
 349 (defmethod alien-type ((type (eql 'vector)) &rest args)
 350   (declare (ignore type args))
 351   (alien-type 'pointer))
 352
 353 (defmethod size-of ((type (eql 'vector)) &rest args)
 354   (declare (ignore type args))
 355   (size-of 'pointer))
 356
 357 (defmethod to-alien-form (vector (type (eql 'vector)) &rest args)
 358   (declare (ignore type))
 359   (destructuring-bind (element-type &optional (length '*)) args
 360     (if (eq length '*)
 361         `(let* ((vector ,vector)
 362                 (location (sap+
 363                            (allocate-memory (+ ,+size-of-int+
 364                                                (* ,(size-of element-type)
 365                                                   (length vector))))
 366                            ,+size-of-int+)))
 367           (make-c-vector ',element-type (length vector) vector location)
 368           (setf (sap-ref-32 location ,(- +size-of-int+)) (length vector))
 369           location)
 370       `(make-c-vector ',element-type ,length ,vector))))
 371
 372 (defmethod from-alien-form (location (type (eql 'vector)) &rest args)
 373   (declare (ignore type))
 374   (destructuring-bind (element-type &optional (length '*)) args
 375     (if (eq length '*)
 376         (error "Can't use vector of variable size as return type")
 377       `(map-c-vector 'vector #'identity ',element-type ',length ,location))))
 378
 379 (defmethod cleanup-form (location (type (eql 'vector)) &rest args)
 380   (declare (ignore type))
 381   (destructuring-bind (element-type &optional (length '*)) args
 382     `(let* ((location ,location)
 383             (length ,(if (eq length '*)
 384                          `(sap-ref-32 location ,(- +size-of-int+))
 385                          length)))
 386       (loop
 387        with destroy = (destroy-function ',element-type)
 388        for i from 0 below length
 389        as offset = 0 then (+ offset ,(size-of element-type))
 390        do (funcall destroy location offset))
 391       (deallocate-memory ,(if (eq length '*)
 392                               `(sap+ location  ,(- +size-of-int+))
 393                             'location)))))