| 1 | ;; Common Lisp bindings for GTK+ v2.0 |
| 2 | ;; Copyright (C) 1999-2001 Espen S. Johnsen <esj@stud.cs.uit.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: ffi.lisp,v 1.12 2005-01-03 16:35:05 espen Exp $ |
| 19 | |
| 20 | (in-package "GLIB") |
| 21 | |
| 22 | |
| 23 | ;;;; Foreign function call interface |
| 24 | |
| 25 | (defvar *package-prefix* nil) |
| 26 | |
| 27 | (defun set-package-prefix (prefix &optional (package *package*)) |
| 28 | (let ((package (find-package package))) |
| 29 | (delete-if #'(lambda (assoc) (eq (car assoc) package)) *package-prefix*) |
| 30 | (push (cons package prefix) *package-prefix*)) |
| 31 | prefix) |
| 32 | |
| 33 | (defun package-prefix (&optional (package *package*)) |
| 34 | (let ((package (find-package package))) |
| 35 | (or |
| 36 | (cdr (assoc package *package-prefix*)) |
| 37 | (substitute #\_ #\- (string-downcase (package-name package)))))) |
| 38 | |
| 39 | (defun find-prefix-package (prefix) |
| 40 | (or |
| 41 | (car (rassoc (string-downcase prefix) *package-prefix* :test #'string=)) |
| 42 | (find-package (string-upcase prefix)))) |
| 43 | |
| 44 | (defmacro use-prefix (prefix &optional (package *package*)) |
| 45 | `(eval-when (:compile-toplevel :load-toplevel :execute) |
| 46 | (set-package-prefix ,prefix ,package))) |
| 47 | |
| 48 | |
| 49 | (defun default-alien-fname (lisp-name) |
| 50 | (let* ((name (substitute #\_ #\- (string-downcase lisp-name))) |
| 51 | (stripped-name |
| 52 | (cond |
| 53 | ((and |
| 54 | (char= (char name 0) #\%) |
| 55 | (string= "_p" name :start2 (- (length name) 2))) |
| 56 | (subseq name 1 (- (length name) 2))) |
| 57 | ((char= (char name 0) #\%) |
| 58 | (subseq name 1)) |
| 59 | ((string= "_p" name :start2 (- (length name) 2)) |
| 60 | (subseq name 0 (- (length name) 2))) |
| 61 | (name))) |
| 62 | (prefix (package-prefix *package*))) |
| 63 | (if (or (not prefix) (string= prefix "")) |
| 64 | stripped-name |
| 65 | (format nil "~A_~A" prefix stripped-name)))) |
| 66 | |
| 67 | (defun default-alien-type-name (type-name) |
| 68 | (let ((prefix (package-prefix *package*))) |
| 69 | (apply |
| 70 | #'concatenate |
| 71 | 'string |
| 72 | (mapcar |
| 73 | #'string-capitalize |
| 74 | (cons prefix (split-string (symbol-name type-name) #\-)))))) |
| 75 | |
| 76 | (defun default-type-name (alien-name) |
| 77 | (let ((parts |
| 78 | (mapcar |
| 79 | #'string-upcase |
| 80 | (split-string-if alien-name #'upper-case-p)))) |
| 81 | (intern |
| 82 | (concatenate-strings |
| 83 | (rest parts) #\-) (find-prefix-package (first parts))))) |
| 84 | |
| 85 | |
| 86 | (defmacro defbinding (name lambda-list return-type &rest docs/args) |
| 87 | (multiple-value-bind (lisp-name c-name) |
| 88 | (if (atom name) |
| 89 | (values name (default-alien-fname name)) |
| 90 | (values-list name)) |
| 91 | |
| 92 | (let ((supplied-lambda-list lambda-list) |
| 93 | (docs nil) |
| 94 | (args nil)) |
| 95 | (dolist (doc/arg docs/args) |
| 96 | (if (stringp doc/arg) |
| 97 | (push doc/arg docs) |
| 98 | (progn |
| 99 | (destructuring-bind (expr type &optional (style :in)) doc/arg |
| 100 | (unless (member style '(:in :out :in-out :return)) |
| 101 | (error "Bogus argument style ~S in ~S." style doc/arg)) |
| 102 | (when (and |
| 103 | (not supplied-lambda-list) |
| 104 | (namep expr) (member style '(:in :in-out :return))) |
| 105 | (push expr lambda-list)) |
| 106 | (push (list (cond |
| 107 | ((and (namep expr) (eq style :out)) expr) |
| 108 | ((namep expr) (make-symbol (string expr))) |
| 109 | ((gensym))) |
| 110 | expr (mklist type) style) args))))) |
| 111 | |
| 112 | (%defbinding |
| 113 | c-name lisp-name (or supplied-lambda-list (nreverse lambda-list)) |
| 114 | return-type (reverse docs) (reverse args))))) |
| 115 | |
| 116 | #+cmu |
| 117 | (defun %defbinding (foreign-name lisp-name lambda-list return-type docs args) |
| 118 | (ext:collect ((alien-types) (alien-bindings) (alien-parameters) |
| 119 | (return-values) (cleanup-forms)) |
| 120 | (dolist (arg args) |
| 121 | (destructuring-bind (var expr type style) arg |
| 122 | (let ((declaration (alien-type type)) |
| 123 | (cleanup (cleanup-form var type))) |
| 124 | |
| 125 | (cond |
| 126 | ((member style '(:out :in-out)) |
| 127 | (alien-types `(* ,declaration)) |
| 128 | (alien-parameters `(addr ,var)) |
| 129 | (alien-bindings |
| 130 | `(,var ,declaration |
| 131 | ,@(when (eq style :in-out) |
| 132 | (list (to-alien-form expr type))))) |
| 133 | (return-values (from-alien-form var type))) |
| 134 | ((eq style :return) |
| 135 | (alien-types declaration) |
| 136 | (alien-bindings |
| 137 | `(,var ,declaration ,(to-alien-form expr type))) |
| 138 | (alien-parameters var) |
| 139 | (return-values (from-alien-form var type))) |
| 140 | (cleanup |
| 141 | (alien-types declaration) |
| 142 | (alien-bindings |
| 143 | `(,var ,declaration ,(to-alien-form expr type))) |
| 144 | (alien-parameters var) |
| 145 | (cleanup-forms cleanup)) |
| 146 | (t |
| 147 | (alien-types declaration) |
| 148 | (alien-parameters (to-alien-form expr type))))))) |
| 149 | |
| 150 | (let* ((alien-name (make-symbol (string lisp-name))) |
| 151 | (alien-funcall `(alien-funcall ,alien-name ,@(alien-parameters)))) |
| 152 | `(defun ,lisp-name ,lambda-list |
| 153 | ,@docs |
| 154 | (declare (optimize (ext:inhibit-warnings 3))) |
| 155 | (with-alien ((,alien-name |
| 156 | (function |
| 157 | ,(alien-type return-type) |
| 158 | ,@(alien-types)) |
| 159 | :extern ,foreign-name) |
| 160 | ,@(alien-bindings)) |
| 161 | ,(if return-type |
| 162 | `(values |
| 163 | (unwind-protect |
| 164 | ,(from-alien-form alien-funcall return-type) |
| 165 | ,@(cleanup-forms)) |
| 166 | ,@(return-values)) |
| 167 | `(progn |
| 168 | (unwind-protect |
| 169 | ,alien-funcall |
| 170 | ,@(cleanup-forms)) |
| 171 | (values ,@(return-values))))))))) |
| 172 | |
| 173 | |
| 174 | ;;; Creates bindings at runtime |
| 175 | (defun mkbinding (name return-type &rest arg-types) |
| 176 | (declare (optimize (ext:inhibit-warnings 3))) |
| 177 | (let* ((ftype |
| 178 | `(function ,@(mapcar #'alien-type (cons return-type arg-types)))) |
| 179 | (alien |
| 180 | (alien::%heap-alien |
| 181 | (alien::make-heap-alien-info |
| 182 | :type (alien::parse-alien-type ftype) |
| 183 | :sap-form (system:foreign-symbol-address name :flavor :code)))) |
| 184 | (translate-arguments (mapcar #'to-alien-function arg-types)) |
| 185 | (translate-return-value (from-alien-function return-type)) |
| 186 | (cleanup-arguments (mapcar #'cleanup-function arg-types))) |
| 187 | |
| 188 | #'(lambda (&rest args) |
| 189 | (map-into args #'funcall translate-arguments args) |
| 190 | (prog1 |
| 191 | (funcall translate-return-value |
| 192 | (apply #'alien:alien-funcall alien args)) |
| 193 | (mapc #'funcall cleanup-arguments args))))) |
| 194 | |
| 195 | |
| 196 | (defmacro defcallback (name (return-type &rest args) &body body) |
| 197 | `(def-callback ,name |
| 198 | (,(alien-type return-type) |
| 199 | ,@(mapcar #'(lambda (arg) |
| 200 | (destructuring-bind (name type) arg |
| 201 | `(,name ,(alien-type type)))) |
| 202 | args)) |
| 203 | ,(to-alien-form |
| 204 | `(let (,@(mapcar #'(lambda (arg) |
| 205 | (destructuring-bind (name type) arg |
| 206 | `(,name ,(from-alien-form name type)))) |
| 207 | args)) |
| 208 | ,@body) |
| 209 | return-type))) |
| 210 | |
| 211 | |
| 212 | |
| 213 | ;;;; Definitons and translations of fundamental types |
| 214 | |
| 215 | (defmacro def-type-method (name args &optional documentation) |
| 216 | `(progn |
| 217 | (defgeneric ,name (,@args type &rest args) |
| 218 | ,@(when documentation `((:documentation ,documentation)))) |
| 219 | (defmethod ,name (,@args (type symbol) &rest args) |
| 220 | (let ((class (find-class type nil))) |
| 221 | (if class |
| 222 | (apply #',name ,@args class args) |
| 223 | (multiple-value-bind (super-type expanded-p) |
| 224 | (type-expand-1 (cons type args)) |
| 225 | (if expanded-p |
| 226 | (,name ,@args super-type) |
| 227 | (call-next-method)))))) |
| 228 | (defmethod ,name (,@args (type cons) &rest args) |
| 229 | (declare (ignore args)) |
| 230 | (apply #',name ,@args (first type) (rest type))))) |
| 231 | |
| 232 | |
| 233 | (def-type-method alien-type ()) |
| 234 | (def-type-method size-of ()) |
| 235 | (def-type-method to-alien-form (form)) |
| 236 | (def-type-method from-alien-form (form)) |
| 237 | (def-type-method cleanup-form (form) |
| 238 | "Creates a form to clean up after the alien call has finished.") |
| 239 | |
| 240 | (def-type-method to-alien-function ()) |
| 241 | (def-type-method from-alien-function ()) |
| 242 | (def-type-method cleanup-function ()) |
| 243 | |
| 244 | (def-type-method copy-to-alien-form (form)) |
| 245 | (def-type-method copy-to-alien-function ()) |
| 246 | (def-type-method copy-from-alien-form (form)) |
| 247 | (def-type-method copy-from-alien-function ()) |
| 248 | |
| 249 | (def-type-method writer-function ()) |
| 250 | (def-type-method reader-function ()) |
| 251 | (def-type-method destroy-function ()) |
| 252 | |
| 253 | (def-type-method unbound-value () |
| 254 | "First return value is true if the type has an unbound value, second return value is the actual unbound value") |
| 255 | |
| 256 | |
| 257 | ;; Sizes of fundamental C types in bytes (8 bits) |
| 258 | (defconstant +size-of-short+ 2) |
| 259 | (defconstant +size-of-int+ 4) |
| 260 | (defconstant +size-of-long+ 4) |
| 261 | (defconstant +size-of-pointer+ 4) |
| 262 | (defconstant +size-of-float+ 4) |
| 263 | (defconstant +size-of-double+ 8) |
| 264 | |
| 265 | ;; Sizes of fundamental C types in bits |
| 266 | (defconstant +bits-of-byte+ 8) |
| 267 | (defconstant +bits-of-short+ 16) |
| 268 | (defconstant +bits-of-int+ 32) |
| 269 | (defconstant +bits-of-long+ 32) |
| 270 | |
| 271 | |
| 272 | (deftype int () '(signed-byte #.+bits-of-int+)) |
| 273 | (deftype unsigned-int () '(unsigned-byte #.+bits-of-int+)) |
| 274 | (deftype long () '(signed-byte #.+bits-of-long+)) |
| 275 | (deftype unsigned-long () '(unsigned-byte #.+bits-of-long+)) |
| 276 | (deftype short () '(signed-byte #.+bits-of-short+)) |
| 277 | (deftype unsigned-short () '(unsigned-byte #.+bits-of-short+)) |
| 278 | (deftype signed (&optional (size '*)) `(signed-byte ,size)) |
| 279 | (deftype unsigned (&optional (size '*)) `(unsigned-byte ,size)) |
| 280 | (deftype char () 'base-char) |
| 281 | (deftype pointer () 'system-area-pointer) |
| 282 | (deftype boolean (&optional (size '*)) (declare (ignore size)) `(member t nil)) |
| 283 | ;(deftype invalid () nil) |
| 284 | |
| 285 | |
| 286 | (defmethod to-alien-form (form (type t) &rest args) |
| 287 | (declare (ignore type args)) |
| 288 | form) |
| 289 | |
| 290 | (defmethod to-alien-function ((type t) &rest args) |
| 291 | (declare (ignore type args)) |
| 292 | #'identity) |
| 293 | |
| 294 | (defmethod from-alien-form (form (type t) &rest args) |
| 295 | (declare (ignore type args)) |
| 296 | form) |
| 297 | |
| 298 | (defmethod from-alien-function ((type t) &rest args) |
| 299 | (declare (ignore type args)) |
| 300 | #'identity) |
| 301 | |
| 302 | (defmethod cleanup-form (form (type t) &rest args) |
| 303 | (declare (ignore form type args)) |
| 304 | nil) |
| 305 | |
| 306 | (defmethod cleanup-function ((type t) &rest args) |
| 307 | (declare (ignore type args)) |
| 308 | #'identity) |
| 309 | |
| 310 | (defmethod destroy-function ((type t) &rest args) |
| 311 | (declare (ignore type args)) |
| 312 | #'(lambda (location &optional offset) |
| 313 | (declare (ignore location offset)))) |
| 314 | |
| 315 | (defmethod copy-to-alien-form (form (type t) &rest args) |
| 316 | (apply #'to-alien-form form type args)) |
| 317 | |
| 318 | (defmethod copy-to-alien-function ((type t) &rest args) |
| 319 | (apply #'to-alien-function type args)) |
| 320 | |
| 321 | (defmethod copy-from-alien-form (form (type t) &rest args) |
| 322 | (apply #'from-alien-form form type args)) |
| 323 | |
| 324 | (defmethod copy-from-alien-function ((type t) &rest args) |
| 325 | (apply #'from-alien-function type args)) |
| 326 | |
| 327 | |
| 328 | (defmethod alien-type ((type (eql 'signed-byte)) &rest args) |
| 329 | (declare (ignore type)) |
| 330 | (destructuring-bind (&optional (size '*)) args |
| 331 | (ecase size |
| 332 | (#.+bits-of-byte+ '(signed-byte 8)) |
| 333 | (#.+bits-of-short+ 'c-call:short) |
| 334 | ((* #.+bits-of-int+) 'c-call:int) |
| 335 | (#.+bits-of-long+ 'c-call:long)))) |
| 336 | |
| 337 | (defmethod size-of ((type (eql 'signed-byte)) &rest args) |
| 338 | (declare (ignore type)) |
| 339 | (destructuring-bind (&optional (size '*)) args |
| 340 | (ecase size |
| 341 | (#.+bits-of-byte+ 1) |
| 342 | (#.+bits-of-short+ +size-of-short+) |
| 343 | ((* #.+bits-of-int+) +size-of-int+) |
| 344 | (#.+bits-of-long+ +size-of-long+)))) |
| 345 | |
| 346 | (defmethod unbound-value ((type t) &rest args) |
| 347 | (declare (ignore type args)) |
| 348 | nil) |
| 349 | |
| 350 | (defmethod writer-function ((type (eql 'signed-byte)) &rest args) |
| 351 | (declare (ignore type)) |
| 352 | (destructuring-bind (&optional (size '*)) args |
| 353 | (let ((size (if (eq size '*) +bits-of-int+ size))) |
| 354 | (ecase size |
| 355 | (8 #'(lambda (value location &optional (offset 0)) |
| 356 | (setf (signed-sap-ref-8 location offset) value))) |
| 357 | (16 #'(lambda (value location &optional (offset 0)) |
| 358 | (setf (signed-sap-ref-16 location offset) value))) |
| 359 | (32 #'(lambda (value location &optional (offset 0)) |
| 360 | (setf (signed-sap-ref-32 location offset) value))) |
| 361 | (64 #'(lambda (value location &optional (offset 0)) |
| 362 | (setf (signed-sap-ref-64 location offset) value))))))) |
| 363 | |
| 364 | (defmethod reader-function ((type (eql 'signed-byte)) &rest args) |
| 365 | (declare (ignore type)) |
| 366 | (destructuring-bind (&optional (size '*)) args |
| 367 | (let ((size (if (eq size '*) +bits-of-int+ size))) |
| 368 | (ecase size |
| 369 | (8 #'(lambda (sap &optional (offset 0)) |
| 370 | (signed-sap-ref-8 sap offset))) |
| 371 | (16 #'(lambda (sap &optional (offset 0)) |
| 372 | (signed-sap-ref-16 sap offset))) |
| 373 | (32 #'(lambda (sap &optional (offset 0)) |
| 374 | (signed-sap-ref-32 sap offset))) |
| 375 | (64 #'(lambda (sap &optional (offset 0)) |
| 376 | (signed-sap-ref-64 sap offset))))))) |
| 377 | |
| 378 | (defmethod alien-type ((type (eql 'unsigned-byte)) &rest args) |
| 379 | (destructuring-bind (&optional (size '*)) args |
| 380 | (ecase size |
| 381 | (#.+bits-of-byte+ '(unsigned #|-byte|# 8)) |
| 382 | (#.+bits-of-short+ 'c-call:unsigned-short) |
| 383 | ((* #.+bits-of-int+) 'c-call:unsigned-int) |
| 384 | (#.+bits-of-long+ 'c-call:unsigned-long)))) |
| 385 | |
| 386 | (defmethod size-of ((type (eql 'unsigned-byte)) &rest args) |
| 387 | (apply #'size-of 'signed args)) |
| 388 | |
| 389 | (defmethod writer-function ((type (eql 'unsigned-byte)) &rest args) |
| 390 | (declare (ignore type)) |
| 391 | (destructuring-bind (&optional (size '*)) args |
| 392 | (let ((size (if (eq size '*) +bits-of-int+ size))) |
| 393 | (ecase size |
| 394 | (8 #'(lambda (value location &optional (offset 0)) |
| 395 | (setf (sap-ref-8 location offset) value))) |
| 396 | (16 #'(lambda (value location &optional (offset 0)) |
| 397 | (setf (sap-ref-16 location offset) value))) |
| 398 | (32 #'(lambda (value location &optional (offset 0)) |
| 399 | (setf (sap-ref-32 location offset) value))) |
| 400 | (64 #'(lambda (value location &optional (offset 0)) |
| 401 | (setf (sap-ref-64 location offset) value))))))) |
| 402 | |
| 403 | (defmethod reader-function ((type (eql 'unsigned-byte)) &rest args) |
| 404 | (declare (ignore type)) |
| 405 | (destructuring-bind (&optional (size '*)) args |
| 406 | (let ((size (if (eq size '*) +bits-of-int+ size))) |
| 407 | (ecase size |
| 408 | (8 #'(lambda (sap &optional (offset 0)) |
| 409 | (sap-ref-8 sap offset))) |
| 410 | (16 #'(lambda (sap &optional (offset 0)) |
| 411 | (sap-ref-16 sap offset))) |
| 412 | (32 #'(lambda (sap &optional (offset 0)) |
| 413 | (sap-ref-32 sap offset))) |
| 414 | (64 #'(lambda (sap &optional (offset 0)) |
| 415 | (sap-ref-64 sap offset))))))) |
| 416 | |
| 417 | |
| 418 | (defmethod alien-type ((type (eql 'integer)) &rest args) |
| 419 | (declare (ignore type args)) |
| 420 | (alien-type 'signed-byte)) |
| 421 | |
| 422 | (defmethod size-of ((type (eql 'integer)) &rest args) |
| 423 | (declare (ignore type args)) |
| 424 | (size-of 'signed-byte)) |
| 425 | |
| 426 | (defmethod writer-function ((type (eql 'integer)) &rest args) |
| 427 | (declare (ignore type args)) |
| 428 | (writer-function 'signed-byte)) |
| 429 | |
| 430 | (defmethod reader-function ((type (eql 'integer)) &rest args) |
| 431 | (declare (ignore type args)) |
| 432 | (reader-function 'signed-byte)) |
| 433 | |
| 434 | |
| 435 | (defmethod alien-type ((type (eql 'fixnum)) &rest args) |
| 436 | (declare (ignore type args)) |
| 437 | (alien-type 'signed-byte)) |
| 438 | |
| 439 | (defmethod size-of ((type (eql 'fixnum)) &rest args) |
| 440 | (declare (ignore type args)) |
| 441 | (size-of 'signed-byte)) |
| 442 | |
| 443 | |
| 444 | (defmethod alien-type ((type (eql 'single-float)) &rest args) |
| 445 | (declare (ignore type args)) |
| 446 | 'alien:single-float) |
| 447 | |
| 448 | (defmethod size-of ((type (eql 'single-float)) &rest args) |
| 449 | (declare (ignore type args)) |
| 450 | +size-of-float+) |
| 451 | |
| 452 | (defmethod writer-function ((type (eql 'single-float)) &rest args) |
| 453 | (declare (ignore type args)) |
| 454 | #'(lambda (value location &optional (offset 0)) |
| 455 | (setf (sap-ref-single location offset) (coerce value 'single-float)))) |
| 456 | |
| 457 | (defmethod reader-function ((type (eql 'single-float)) &rest args) |
| 458 | (declare (ignore type args)) |
| 459 | #'(lambda (sap &optional (offset 0)) |
| 460 | (sap-ref-single sap offset))) |
| 461 | |
| 462 | |
| 463 | (defmethod alien-type ((type (eql 'double-float)) &rest args) |
| 464 | (declare (ignore type args)) |
| 465 | 'alien:double-float) |
| 466 | |
| 467 | (defmethod size-of ((type (eql 'double-float)) &rest args) |
| 468 | (declare (ignore type args)) |
| 469 | +size-of-double+) |
| 470 | |
| 471 | (defmethod writer-function ((type (eql 'double-float)) &rest args) |
| 472 | (declare (ignore type args)) |
| 473 | #'(lambda (value location &optional (offset 0)) |
| 474 | (setf (sap-ref-double location offset) (coerce value 'double-float)))) |
| 475 | |
| 476 | (defmethod reader-function ((type (eql 'double-float)) &rest args) |
| 477 | (declare (ignore type args)) |
| 478 | #'(lambda (sap &optional (offset 0)) |
| 479 | (sap-ref-double sap offset))) |
| 480 | |
| 481 | |
| 482 | (defmethod alien-type ((type (eql 'base-char)) &rest args) |
| 483 | (declare (ignore type args)) |
| 484 | 'c-call:char) |
| 485 | |
| 486 | (defmethod size-of ((type (eql 'base-char)) &rest args) |
| 487 | (declare (ignore type args)) |
| 488 | 1) |
| 489 | |
| 490 | (defmethod writer-function ((type (eql 'base-char)) &rest args) |
| 491 | (declare (ignore type args)) |
| 492 | #'(lambda (char location &optional (offset 0)) |
| 493 | (setf (sap-ref-8 location offset) (char-code char)))) |
| 494 | |
| 495 | (defmethod reader-function ((type (eql 'base-char)) &rest args) |
| 496 | (declare (ignore type args)) |
| 497 | #'(lambda (location &optional (offset 0)) |
| 498 | (code-char (sap-ref-8 location offset)))) |
| 499 | |
| 500 | |
| 501 | (defmethod alien-type ((type (eql 'string)) &rest args) |
| 502 | (declare (ignore type args)) |
| 503 | (alien-type 'pointer)) |
| 504 | |
| 505 | (defmethod size-of ((type (eql 'string)) &rest args) |
| 506 | (declare (ignore type args)) |
| 507 | (size-of 'pointer)) |
| 508 | |
| 509 | (defmethod to-alien-form (string (type (eql 'string)) &rest args) |
| 510 | (declare (ignore type args)) |
| 511 | `(let ((string ,string)) |
| 512 | ;; Always copy strings to prevent seg fault due to GC |
| 513 | (copy-memory |
| 514 | (make-pointer (1+ (kernel:get-lisp-obj-address string))) |
| 515 | (1+ (length string))))) |
| 516 | |
| 517 | (defmethod to-alien-function ((type (eql 'string)) &rest args) |
| 518 | (declare (ignore type args)) |
| 519 | #'(lambda (string) |
| 520 | (copy-memory |
| 521 | (make-pointer (1+ (kernel:get-lisp-obj-address string))) |
| 522 | (1+ (length string))))) |
| 523 | |
| 524 | (defmethod from-alien-form (string (type (eql 'string)) &rest args) |
| 525 | (declare (ignore type args)) |
| 526 | `(let ((string ,string)) |
| 527 | (unless (null-pointer-p string) |
| 528 | (prog1 |
| 529 | (c-call::%naturalize-c-string string) |
| 530 | (deallocate-memory string))))) |
| 531 | |
| 532 | (defmethod from-alien-function ((type (eql 'string)) &rest args) |
| 533 | (declare (ignore type args)) |
| 534 | #'(lambda (string) |
| 535 | (unless (null-pointer-p string) |
| 536 | (prog1 |
| 537 | (c-call::%naturalize-c-string string) |
| 538 | (deallocate-memory string))))) |
| 539 | |
| 540 | (defmethod cleanup-form (string (type (eql 'string)) &rest args) |
| 541 | (declare (ignore type args)) |
| 542 | `(let ((string ,string)) |
| 543 | (unless (null-pointer-p string) |
| 544 | (deallocate-memory string)))) |
| 545 | |
| 546 | (defmethod cleanup-function ((type (eql 'string)) &rest args) |
| 547 | (declare (ignore args)) |
| 548 | #'(lambda (string) |
| 549 | (unless (null-pointer-p string) |
| 550 | (deallocate-memory string)))) |
| 551 | |
| 552 | (defmethod copy-from-alien-form (string (type (eql 'string)) &rest args) |
| 553 | (declare (ignore type args)) |
| 554 | `(let ((string ,string)) |
| 555 | (unless (null-pointer-p string) |
| 556 | (c-call::%naturalize-c-string string)))) |
| 557 | |
| 558 | (defmethod copy-from-alien-function ((type (eql 'string)) &rest args) |
| 559 | (declare (ignore type args)) |
| 560 | #'(lambda (string) |
| 561 | (unless (null-pointer-p string) |
| 562 | (c-call::%naturalize-c-string string)))) |
| 563 | |
| 564 | (defmethod writer-function ((type (eql 'string)) &rest args) |
| 565 | (declare (ignore type args)) |
| 566 | #'(lambda (string location &optional (offset 0)) |
| 567 | (assert (null-pointer-p (sap-ref-sap location offset))) |
| 568 | (setf (sap-ref-sap location offset) |
| 569 | (copy-memory |
| 570 | (make-pointer (1+ (kernel:get-lisp-obj-address string))) |
| 571 | (1+ (length string)))))) |
| 572 | |
| 573 | (defmethod reader-function ((type (eql 'string)) &rest args) |
| 574 | (declare (ignore type args)) |
| 575 | #'(lambda (location &optional (offset 0)) |
| 576 | (unless (null-pointer-p (sap-ref-sap location offset)) |
| 577 | (c-call::%naturalize-c-string (sap-ref-sap location offset))))) |
| 578 | |
| 579 | (defmethod destroy-function ((type (eql 'string)) &rest args) |
| 580 | (declare (ignore type args)) |
| 581 | #'(lambda (location &optional (offset 0)) |
| 582 | (unless (null-pointer-p (sap-ref-sap location offset)) |
| 583 | (deallocate-memory (sap-ref-sap location offset)) |
| 584 | (setf (sap-ref-sap location offset) (make-pointer 0))))) |
| 585 | |
| 586 | (defmethod unbound-value ((type (eql 'string)) &rest args) |
| 587 | (declare (ignore type args)) |
| 588 | (values t nil)) |
| 589 | |
| 590 | (defmethod alien-type ((type (eql 'pathname)) &rest args) |
| 591 | (declare (ignore type args)) |
| 592 | (alien-type 'string)) |
| 593 | |
| 594 | (defmethod size-of ((type (eql 'pathname)) &rest args) |
| 595 | (declare (ignore type args)) |
| 596 | (size-of 'string)) |
| 597 | |
| 598 | (defmethod to-alien-form (path (type (eql 'pathname)) &rest args) |
| 599 | (declare (ignore type args)) |
| 600 | (to-alien-form `(namestring (translate-logical-pathname ,path)) 'string)) |
| 601 | |
| 602 | (defmethod to-alien-function ((type (eql 'pathname)) &rest args) |
| 603 | (declare (ignore type args)) |
| 604 | (let ((string-function (to-alien-function 'string))) |
| 605 | #'(lambda (path) |
| 606 | (funcall string-function (namestring path))))) |
| 607 | |
| 608 | (defmethod from-alien-form (string (type (eql 'pathname)) &rest args) |
| 609 | (declare (ignore type args)) |
| 610 | `(parse-namestring ,(from-alien-form string 'string))) |
| 611 | |
| 612 | (defmethod from-alien-function ((type (eql 'pathname)) &rest args) |
| 613 | (declare (ignore type args)) |
| 614 | (let ((string-function (from-alien-function 'string))) |
| 615 | #'(lambda (string) |
| 616 | (parse-namestring (funcall string-function string))))) |
| 617 | |
| 618 | (defmethod cleanup-form (string (type (eql 'pathnanme)) &rest args) |
| 619 | (declare (ignore type args)) |
| 620 | (cleanup-form string 'string)) |
| 621 | |
| 622 | (defmethod cleanup-function ((type (eql 'pathnanme)) &rest args) |
| 623 | (declare (ignore type args)) |
| 624 | (cleanup-function 'string)) |
| 625 | |
| 626 | (defmethod writer-function ((type (eql 'pathname)) &rest args) |
| 627 | (declare (ignore type args)) |
| 628 | (let ((string-writer (writer-function 'string))) |
| 629 | #'(lambda (path location &optional (offset 0)) |
| 630 | (funcall string-writer (namestring path) location offset)))) |
| 631 | |
| 632 | (defmethod reader-function ((type (eql 'pathname)) &rest args) |
| 633 | (declare (ignore type args)) |
| 634 | (let ((string-reader (reader-function 'string))) |
| 635 | #'(lambda (location &optional (offset 0)) |
| 636 | (let ((string (funcall string-reader location offset))) |
| 637 | (when string |
| 638 | (parse-namestring string)))))) |
| 639 | |
| 640 | (defmethod destroy-function ((type (eql 'pathname)) &rest args) |
| 641 | (declare (ignore type args)) |
| 642 | (destroy-function 'string)) |
| 643 | |
| 644 | (defmethod unbound-value ((type (eql 'pathname)) &rest args) |
| 645 | (declare (ignore type args)) |
| 646 | (unbound-value 'string)) |
| 647 | |
| 648 | |
| 649 | (defmethod alien-type ((type (eql 'boolean)) &rest args) |
| 650 | (apply #'alien-type 'signed-byte args)) |
| 651 | |
| 652 | (defmethod size-of ((type (eql 'boolean)) &rest args) |
| 653 | (apply #'size-of 'signed-byte args)) |
| 654 | |
| 655 | (defmethod to-alien-form (boolean (type (eql 'boolean)) &rest args) |
| 656 | (declare (ignore type args)) |
| 657 | `(if ,boolean 1 0)) |
| 658 | |
| 659 | (defmethod to-alien-function ((type (eql 'boolean)) &rest args) |
| 660 | (declare (ignore type args)) |
| 661 | #'(lambda (boolean) |
| 662 | (if boolean 1 0))) |
| 663 | |
| 664 | (defmethod from-alien-form (boolean (type (eql 'boolean)) &rest args) |
| 665 | (declare (ignore type args)) |
| 666 | `(not (zerop ,boolean))) |
| 667 | |
| 668 | (defmethod from-alien-function ((type (eql 'boolean)) &rest args) |
| 669 | (declare (ignore type args)) |
| 670 | #'(lambda (boolean) |
| 671 | (not (zerop boolean)))) |
| 672 | |
| 673 | (defmethod writer-function ((type (eql 'boolean)) &rest args) |
| 674 | (declare (ignore type)) |
| 675 | (let ((writer (apply #'writer-function 'signed-byte args))) |
| 676 | #'(lambda (boolean location &optional (offset 0)) |
| 677 | (funcall writer (if boolean 1 0) location offset)))) |
| 678 | |
| 679 | (defmethod reader-function ((type (eql 'boolean)) &rest args) |
| 680 | (declare (ignore type)) |
| 681 | (let ((reader (apply #'reader-function 'signed-byte args))) |
| 682 | #'(lambda (location &optional (offset 0)) |
| 683 | (not (zerop (funcall reader location offset)))))) |
| 684 | |
| 685 | |
| 686 | (defmethod alien-type ((type (eql 'or)) &rest args) |
| 687 | (let ((alien-type (alien-type (first args)))) |
| 688 | (unless (every #'(lambda (type) |
| 689 | (eq alien-type (alien-type type))) |
| 690 | (rest args)) |
| 691 | (error "No common alien type specifier for union type: ~A" |
| 692 | (cons type args))) |
| 693 | alien-type)) |
| 694 | |
| 695 | (defmethod size-of ((type (eql 'or)) &rest args) |
| 696 | (declare (ignore type)) |
| 697 | (size-of (first args))) |
| 698 | |
| 699 | (defmethod to-alien-form (form (type (eql 'or)) &rest args) |
| 700 | (declare (ignore type)) |
| 701 | `(let ((value ,form)) |
| 702 | (etypecase value |
| 703 | ,@(mapcar |
| 704 | #'(lambda (type) |
| 705 | `(,type ,(to-alien-form 'value type))) |
| 706 | args)))) |
| 707 | |
| 708 | (defmethod to-alien-function ((type (eql 'or)) &rest types) |
| 709 | (declare (ignore type)) |
| 710 | (let ((functions (mapcar #'to-alien-function types))) |
| 711 | #'(lambda (value) |
| 712 | (loop |
| 713 | for function in functions |
| 714 | for type in types |
| 715 | when (typep value type) |
| 716 | do (return (funcall function value)) |
| 717 | finally (error "~S is not of type ~A" value `(or ,@types)))))) |
| 718 | |
| 719 | (defmethod alien-type ((type (eql 'system-area-pointer)) &rest args) |
| 720 | (declare (ignore type args)) |
| 721 | 'system-area-pointer) |
| 722 | |
| 723 | (defmethod size-of ((type (eql 'system-area-pointer)) &rest args) |
| 724 | (declare (ignore type args)) |
| 725 | +size-of-pointer+) |
| 726 | |
| 727 | (defmethod writer-function ((type (eql 'system-area-pointer)) &rest args) |
| 728 | (declare (ignore type args)) |
| 729 | #'(lambda (sap location &optional (offset 0)) |
| 730 | (setf (sap-ref-sap location offset) sap))) |
| 731 | |
| 732 | (defmethod reader-function ((type (eql 'system-area-pointer)) &rest args) |
| 733 | (declare (ignore type args)) |
| 734 | #'(lambda (location &optional (offset 0)) |
| 735 | (sap-ref-sap location offset))) |
| 736 | |
| 737 | |
| 738 | (defmethod alien-type ((type (eql 'null)) &rest args) |
| 739 | (declare (ignore type args)) |
| 740 | (alien-type 'pointer)) |
| 741 | |
| 742 | (defmethod size-of ((type (eql 'null)) &rest args) |
| 743 | (declare (ignore type args)) |
| 744 | (size-of 'pointer)) |
| 745 | |
| 746 | (defmethod to-alien-form (null (type (eql 'null)) &rest args) |
| 747 | (declare (ignore null type args)) |
| 748 | `(make-pointer 0)) |
| 749 | |
| 750 | (defmethod to-alien-function ((type (eql 'null)) &rest args) |
| 751 | (declare (ignore type args)) |
| 752 | #'(lambda (null) |
| 753 | (declare (ignore null)) |
| 754 | (make-pointer 0))) |
| 755 | |
| 756 | |
| 757 | (defmethod alien-type ((type (eql 'nil)) &rest args) |
| 758 | (declare (ignore type args)) |
| 759 | 'c-call:void) |
| 760 | |
| 761 | (defmethod from-alien-function ((type (eql 'nil)) &rest args) |
| 762 | (declare (ignore type args)) |
| 763 | #'(lambda (value) |
| 764 | (declare (ignore value)) |
| 765 | (values))) |
| 766 | |
| 767 | |
| 768 | (defmethod alien-type ((type (eql 'copy-of)) &rest args) |
| 769 | (declare (ignore type)) |
| 770 | (alien-type (first args))) |
| 771 | |
| 772 | (defmethod size-of ((type (eql 'copy-of)) &rest args) |
| 773 | (declare (ignore type)) |
| 774 | (size-of (first args))) |
| 775 | |
| 776 | (defmethod to-alien-form (form (type (eql 'copy-of)) &rest args) |
| 777 | (declare (ignore type)) |
| 778 | (copy-to-alien-form form (first args))) |
| 779 | |
| 780 | (defmethod to-alien-function ((type (eql 'copy-of)) &rest args) |
| 781 | (declare (ignore type)) |
| 782 | (copy-to-alien-function (first args))) |
| 783 | |
| 784 | (defmethod from-alien-form (form (type (eql 'copy-of)) &rest args) |
| 785 | (declare (ignore type)) |
| 786 | (copy-from-alien-form form (first args))) |
| 787 | |
| 788 | (defmethod from-alien-function ((type (eql 'copy-of)) &rest args) |
| 789 | (declare (ignore type)) |
| 790 | (copy-from-alien-function (first args))) |
| 791 | |
| 792 | (defmethod reader-function ((type (eql 'copy-of)) &rest args) |
| 793 | (declare (ignore type)) |
| 794 | (reader-function (first args))) |
| 795 | |
| 796 | (defmethod writer-function ((type (eql 'copy-of)) &rest args) |
| 797 | (declare (ignore type)) |
| 798 | (writer-function (first args))) |
| 799 | |
| 800 | (export 'copy-of) |