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 1.24 2005-01-30 14:26:41 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 (defvar *user-data* (make-hash-table))
  50 (defvar *user-data-count* 0)
  51
  52 (defun register-user-data (object &optional destroy-function)
  53   (check-type destroy-function (or null symbol function))
  54   (incf *user-data-count*)
  55   (setf
  56    (gethash *user-data-count* *user-data*)
  57    (cons object destroy-function))
  58   *user-data-count*)
  59
  60 (defun find-user-data (id)
  61   (check-type id fixnum)
  62   (multiple-value-bind (user-data p) (gethash id *user-data*)
  63     (values (car user-data) p)))
  64
  65 (defun user-data-exists-p (id)
  66   (nth-value 1 (find-user-data id)))
  67
  68 (defun update-user-data (id object)
  69   (check-type id fixnum)
  70   (multiple-value-bind (user-data exists-p) (gethash id *user-data*)
  71     (cond
  72      ((not exists-p) (error "User data id ~A does not exist" id))
  73      (t
  74       (when (cdr user-data)
  75         (funcall (cdr user-data) (car user-data)))
  76       (setf (car user-data) object)))))
  77
  78 (defun destroy-user-data (id)
  79   (check-type id fixnum)
  80   (let ((user-data (gethash id *user-data*)))
  81     (when (cdr user-data)
  82       (funcall (cdr user-data) (car user-data))))
  83   (remhash id *user-data*))
  84
  85
  86 ;;;; Quarks
  87
  88 (deftype quark () 'unsigned)
  89
  90 (defbinding %quark-from-string () quark
  91   (string string))
  92
  93 (defun quark-intern (object)
  94   (etypecase object
  95     (quark object)
  96     (string (%quark-from-string object))
  97     (symbol (%quark-from-string (format nil "clg-~A:~A"
  98                                  (package-name (symbol-package object))
  99                                  object)))))
 100
 101 (defbinding quark-to-string () (copy-of string)
 102   (quark quark))
 103
 104
 105 ;;;; Linked list (GList)
 106
 107 (deftype glist (type)
 108   `(or (null (cons ,type list))))
 109
 110 (defbinding (%glist-append "g_list_append") () pointer
 111   (glist pointer)
 112   (nil null))
 113
 114 (defun make-glist (type list)
 115   (loop
 116    with writer = (writer-function type)
 117    for element in list
 118    as glist = (%glist-append (or glist (make-pointer 0)))
 119    do (funcall writer element glist)
 120    finally (return glist)))
 121
 122 (defun glist-next (glist)
 123   (unless (null-pointer-p glist)
 124     (sap-ref-sap glist +size-of-pointer+)))
 125
 126 ;; Also used for gslists
 127 (defun map-glist (seqtype function glist element-type)
 128   (let ((reader (reader-function element-type)))
 129     (case seqtype
 130      ((nil)
 131       (loop
 132        as tmp = glist then (glist-next tmp)
 133        until (null-pointer-p tmp)
 134        do (funcall function (funcall reader tmp))))
 135      (list
 136       (loop
 137        as tmp = glist then (glist-next tmp)
 138        until (null-pointer-p tmp)
 139        collect (funcall function (funcall reader tmp))))
 140      (t
 141       (coerce
 142        (loop
 143         as tmp = glist then (glist-next tmp)
 144         until (null-pointer-p tmp)
 145         collect (funcall function (funcall reader tmp)))
 146        seqtype)))))
 147
 148 (defbinding (glist-free "g_list_free") () nil
 149   (glist pointer))
 150
 151 (defun destroy-glist (glist element-type)
 152   (loop
 153    with destroy = (destroy-function element-type)
 154    as tmp = glist then (glist-next tmp)
 155    until (null-pointer-p tmp)
 156    do (funcall destroy tmp 0))
 157   (glist-free glist))
 158
 159 (defmethod alien-type ((type (eql 'glist)) &rest args)
 160   (declare (ignore type args))
 161   (alien-type 'pointer))
 162
 163 (defmethod size-of ((type (eql 'glist)) &rest args)
 164   (declare (ignore type args))
 165   (size-of 'pointer))
 166
 167 (defmethod to-alien-form (list (type (eql 'glist)) &rest args)
 168   (declare (ignore type))
 169   (destructuring-bind (element-type) args
 170     `(make-glist ',element-type ,list)))
 171
 172 (defmethod to-alien-function ((type (eql 'glist)) &rest args)
 173   (declare (ignore type))
 174   (destructuring-bind (element-type) args
 175     #'(lambda (list)
 176         (make-glist element-type list))))
 177
 178 (defmethod from-alien-form (glist (type (eql 'glist)) &rest args)
 179   (declare (ignore type))
 180   (destructuring-bind (element-type) args
 181     `(let ((glist ,glist))
 182       (unwind-protect
 183            (map-glist 'list #'identity glist ',element-type)
 184         (destroy-glist glist ',element-type)))))
 185
 186 (defmethod from-alien-function ((type (eql 'glist)) &rest args)
 187   (declare (ignore type))
 188   (destructuring-bind (element-type) args
 189     #'(lambda (glist)
 190         (unwind-protect
 191              (map-glist 'list #'identity glist element-type)
 192           (destroy-glist glist element-type)))))
 193
 194 (defmethod copy-from-alien-form (glist (type (eql 'glist)) &rest args)
 195   (declare (ignore type))
 196   (destructuring-bind (element-type) args
 197     `(map-glist 'list #'identity ,glist ',element-type)))
 198
 199 (defmethod copy-from-alien-function ((type (eql 'glist)) &rest args)
 200   (declare (ignore type))
 201   (destructuring-bind (element-type) args
 202     #'(lambda (glist)
 203         (map-glist 'list #'identity glist element-type))))
 204
 205 (defmethod cleanup-form (glist (type (eql 'glist)) &rest args)
 206   (declare (ignore type))
 207   (destructuring-bind (element-type) args
 208     `(destroy-glist ,glist ',element-type)))
 209
 210 (defmethod cleanup-function ((type (eql 'glist)) &rest args)
 211   (declare (ignore type))
 212   (destructuring-bind (element-type) args
 213     #'(lambda (glist)
 214         (destroy-glist glist element-type))))
 215
 216 (defmethod writer-function ((type (eql 'glist)) &rest args)
 217   (declare (ignore type))
 218   (destructuring-bind (element-type) args
 219     #'(lambda (list location &optional (offset 0))
 220         (setf
 221          (sap-ref-sap location offset)
 222          (make-glist element-type list)))))
 223
 224 (defmethod reader-function ((type (eql 'glist)) &rest args)
 225   (declare (ignore type))
 226   (destructuring-bind (element-type) args
 227     #'(lambda (location &optional (offset 0))
 228         (unless (null-pointer-p (sap-ref-sap location offset))
 229           (map-glist 'list #'identity (sap-ref-sap location offset) element-type)))))
 230
 231 (defmethod destroy-function ((type (eql 'glist)) &rest args)
 232   (declare (ignore type))
 233   (destructuring-bind (element-type) args
 234     #'(lambda (location &optional (offset 0))
 235         (unless (null-pointer-p (sap-ref-sap location offset))
 236           (destroy-glist (sap-ref-sap location offset) element-type)
 237           (setf (sap-ref-sap location offset) (make-pointer 0))))))
 238
 239
 240
 241 ;;;; Single linked list (GSList)
 242
 243 (deftype gslist (type) `(or (null (cons ,type list))))
 244
 245 (defbinding (%gslist-prepend "g_slist_prepend") () pointer
 246   (gslist pointer)
 247   (nil null))
 248
 249 (defun make-gslist (type list)
 250   (loop
 251    with writer = (writer-function type)
 252    for element in (reverse list)
 253    as gslist = (%gslist-prepend (or gslist (make-pointer 0)))
 254    do (funcall writer element gslist)
 255    finally (return gslist)))
 256
 257 (defbinding (gslist-free "g_slist_free") () nil
 258   (gslist pointer))
 259
 260 (defun destroy-gslist (gslist element-type)
 261   (loop
 262    with destroy = (destroy-function element-type)
 263    as tmp = gslist then (glist-next tmp)
 264    until (null-pointer-p tmp)
 265    do (funcall destroy tmp 0))
 266   (gslist-free gslist))
 267
 268 (defmethod alien-type ((type (eql 'gslist)) &rest args)
 269   (declare (ignore type args))
 270   (alien-type 'pointer))
 271
 272 (defmethod size-of ((type (eql 'gslist)) &rest args)
 273   (declare (ignore type args))
 274   (size-of 'pointer))
 275
 276 (defmethod to-alien-form (list (type (eql 'gslist)) &rest args)
 277   (declare (ignore type))
 278   (destructuring-bind (element-type) args
 279     `(make-sglist ',element-type ,list)))
 280
 281 (defmethod to-alien-function ((type (eql 'gslist)) &rest args)
 282   (declare (ignore type))
 283   (destructuring-bind (element-type) args
 284     #'(lambda (list)
 285         (make-gslist element-type list))))
 286
 287 (defmethod from-alien-form (gslist (type (eql 'gslist)) &rest args)
 288   (declare (ignore type))
 289   (destructuring-bind (element-type) args
 290     `(let ((gslist ,gslist))
 291       (unwind-protect
 292            (map-glist 'list #'identity gslist ',element-type)
 293         (destroy-gslist gslist ',element-type)))))
 294
 295 (defmethod from-alien-function ((type (eql 'gslist)) &rest args)
 296   (declare (ignore type))
 297   (destructuring-bind (element-type) args
 298     #'(lambda (gslist)
 299         (unwind-protect
 300              (map-glist 'list #'identity gslist element-type)
 301           (destroy-gslist gslist element-type)))))
 302
 303 (defmethod copy-from-alien-form (gslist (type (eql 'gslist)) &rest args)
 304   (declare (ignore type))
 305   (destructuring-bind (element-type) args
 306     `(map-glist 'list #'identity ,gslist ',element-type)))
 307
 308 (defmethod from-alien-function ((type (eql 'gslist)) &rest args)
 309   (declare (ignore type))
 310   (destructuring-bind (element-type) args
 311     #'(lambda (gslist)
 312         (map-glist 'list #'identity gslist element-type))))
 313
 314 (defmethod cleanup-form (gslist (type (eql 'gslist)) &rest args)
 315   (declare (ignore type))
 316   (destructuring-bind (element-type) args
 317     `(destroy-gslist ,gslist ',element-type)))
 318
 319 (defmethod cleanup-function ((type (eql 'gslist)) &rest args)
 320   (declare (ignore type))
 321   (destructuring-bind (element-type) args
 322     #'(lambda (gslist)
 323         (destroy-gslist gslist element-type))))
 324
 325 (defmethod writer-function ((type (eql 'gslist)) &rest args)
 326   (declare (ignore type))
 327   (destructuring-bind (element-type) args
 328     #'(lambda (list location &optional (offset 0))
 329         (setf
 330          (sap-ref-sap location offset)
 331          (make-gslist element-type list)))))
 332
 333 (defmethod reader-function ((type (eql 'gslist)) &rest args)
 334   (declare (ignore type))
 335   (destructuring-bind (element-type) args
 336     #'(lambda (location &optional (offset 0))
 337         (unless (null-pointer-p (sap-ref-sap location offset))
 338           (map-glist 'list #'identity (sap-ref-sap location offset) element-type)))))
 339
 340 (defmethod destroy-function ((type (eql 'gslist)) &rest args)
 341   (declare (ignore type))
 342   (destructuring-bind (element-type) args
 343     #'(lambda (location &optional (offset 0))
 344         (unless (null-pointer-p (sap-ref-sap location offset))
 345           (destroy-gslist (sap-ref-sap location offset) element-type)
 346           (setf (sap-ref-sap location offset) (make-pointer 0))))))
 347
 348
 349 ;;; Vector
 350
 351 (defun make-c-vector (type length &optional content location)
 352   (let* ((size-of-type (size-of type))
 353          (location (or location (allocate-memory (* size-of-type length))))
 354          (writer (writer-function type)))
 355     (etypecase content
 356       (vector
 357        (loop
 358         for element across content
 359         for i from 0 below length
 360         as offset = 0 then (+ offset size-of-type)
 361         do (funcall writer element location offset)))
 362       (list
 363        (loop
 364         for element in content
 365         for i from 0 below length
 366         as offset = 0 then (+ offset size-of-type)
 367         do (funcall writer element location offset))))
 368     location))
 369
 370
 371 (defun map-c-vector (seqtype function location element-type length)
 372   (let ((reader (reader-function element-type))
 373         (size-of-element (size-of element-type)))
 374     (case seqtype
 375      ((nil)
 376       (loop
 377        for i from 0 below length
 378        as offset = 0 then (+ offset size-of-element)
 379        do (funcall function (funcall reader location offset))))
 380      (list
 381       (loop
 382        for i from 0 below length
 383        as offset = 0 then (+ offset size-of-element)
 384        collect (funcall function (funcall reader location offset))))
 385      (t
 386       (loop
 387        with sequence = (make-sequence seqtype length)
 388        for i from 0 below length
 389        as offset = 0 then (+ offset size-of-element)
 390        do (setf
 391            (elt sequence i)
 392            (funcall function (funcall reader location offset)))
 393        finally (return sequence))))))
 394
 395
 396 (defun destroy-c-vector (location element-type length)
 397   (loop
 398    with destroy = (destroy-function element-type)
 399    with element-size = (size-of element-type)
 400    for i from 0 below length
 401    as offset = 0 then (+ offset element-size)
 402    do (funcall destroy location offset))
 403   (deallocate-memory location))
 404
 405
 406 (defmethod alien-type ((type (eql 'vector)) &rest args)
 407   (declare (ignore type args))
 408   (alien-type 'pointer))
 409
 410 (defmethod size-of ((type (eql 'vector)) &rest args)
 411   (declare (ignore type args))
 412   (size-of 'pointer))
 413
 414 (defmethod to-alien-form (vector (type (eql 'vector)) &rest args)
 415   (declare (ignore type))
 416   (destructuring-bind (element-type &optional (length '*)) args
 417     (if (eq length '*)
 418         `(let* ((vector ,vector)
 419                 (location (sap+
 420                            (allocate-memory (+ ,+size-of-int+
 421                                                (* ,(size-of element-type)
 422                                                   (length vector))))
 423                            ,+size-of-int+)))
 424           (make-c-vector ',element-type (length vector) vector location)
 425           (setf (sap-ref-32 location ,(- +size-of-int+)) (length vector))
 426           location)
 427       `(make-c-vector ',element-type ,length ,vector))))
 428
 429 (defmethod from-alien-form (c-vector (type (eql 'vector)) &rest args)
 430   (declare (ignore type))
 431   (destructuring-bind (element-type &optional (length '*)) args
 432     (if (eq length '*)
 433         (error "Can't use vector of variable size as return type")
 434       `(let ((c-vector ,c-vector))
 435         (prog1
 436             (map-c-vector 'vector #'identity c-vector ',element-type ,length)
 437           (destroy-c-vector c-vector ',element-type ,length))))))
 438
 439 (defmethod copy-from-alien-form (c-vector (type (eql 'vector)) &rest args)
 440   (declare (ignore type))
 441   (destructuring-bind (element-type &optional (length '*)) args
 442     (if (eq length '*)
 443         (error "Can't use vector of variable size as return type")
 444       `(map-c-vector 'vector #'identity ,c-vector ',element-type ',length))))
 445
 446 (defmethod cleanup-form (location (type (eql 'vector)) &rest args)
 447   (declare (ignore type))
 448   (destructuring-bind (element-type &optional (length '*)) args
 449     `(let* ((location ,location)
 450             (length ,(if (eq length '*)
 451                          `(sap-ref-32 location ,(- +size-of-int+))
 452                          length)))
 453       (loop
 454        with destroy = (destroy-function ',element-type)
 455        for i from 0 below length
 456        as offset = 0 then (+ offset ,(size-of element-type))
 457        do (funcall destroy location offset))
 458       (deallocate-memory ,(if (eq length '*)
 459                               `(sap+ location  ,(- +size-of-int+))
 460                             'location)))))
 461
 462 (defmethod writer-function ((type (eql 'vector)) &rest args)
 463   (declare (ignore type))
 464   (destructuring-bind (element-type &optional (length '*)) args
 465     #'(lambda (vector location &optional (offset 0))
 466         (setf
 467          (sap-ref-sap location offset)
 468          (make-c-vector element-type length vector)))))
 469
 470 (defmethod reader-function ((type (eql 'vector)) &rest args)
 471   (declare (ignore type))
 472   (destructuring-bind (element-type &optional (length '*)) args
 473     (if (eq length '*)
 474         (error "Can't create reader function for vector of variable size")
 475       #'(lambda (location &optional (offset 0))
 476           (unless (null-pointer-p (sap-ref-sap location offset))
 477             (map-c-vector 'vector #'identity (sap-ref-sap location offset)
 478              element-type length))))))
 479
 480 (defmethod destroy-function ((type (eql 'vector)) &rest args)
 481   (declare (ignore type))
 482   (destructuring-bind (element-type &optional (length '*)) args
 483     (if (eq length '*)
 484         (error "Can't create destroy function for vector of variable size")
 485       #'(lambda (location &optional (offset 0))
 486           (unless (null-pointer-p (sap-ref-sap location offset))
 487             (destroy-c-vector
 488              (sap-ref-sap location offset) element-type length)
 489             (setf (sap-ref-sap location offset) (make-pointer 0)))))))