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abdf50aa MW |
1 | ;;; -*-lisp-*- |
2 | ;;; | |
dea4d055 | 3 | ;;; C type representation implementation |
abdf50aa | 4 | ;;; |
dea4d055 | 5 | ;;; (c) 2009 Straylight/Edgeware |
abdf50aa MW |
6 | ;;; |
7 | ||
8 | ;;;----- Licensing notice --------------------------------------------------- | |
9 | ;;; | |
e0808c47 | 10 | ;;; This file is part of the Sensible Object Design, an object system for C. |
abdf50aa MW |
11 | ;;; |
12 | ;;; SOD is free software; you can redistribute it and/or modify | |
13 | ;;; it under the terms of the GNU General Public License as published by | |
14 | ;;; the Free Software Foundation; either version 2 of the License, or | |
15 | ;;; (at your option) any later version. | |
16 | ;;; | |
17 | ;;; SOD is distributed in the hope that it will be useful, | |
18 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;;; GNU General Public License for more details. | |
21 | ;;; | |
22 | ;;; You should have received a copy of the GNU General Public License | |
23 | ;;; along with SOD; if not, write to the Free Software Foundation, | |
24 | ;;; Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
25 | ||
26 | (cl:in-package #:sod) | |
27 | ||
28 | ;;;-------------------------------------------------------------------------- | |
dea4d055 MW |
29 | ;;; Interning types. |
30 | ||
31 | (defparameter *c-type-intern-map* (make-hash-table :test #'equal) | |
32 | "Hash table mapping lists describing types to their distinguished | |
33 | representations.") | |
34 | ||
35 | (defun intern-c-type (class &rest initargs) | |
36 | "If the CLASS and INITARGS have already been interned, then return the | |
37 | existing object; otherwise make a new one." | |
38 | (let ((list (cons class initargs))) | |
39 | (or (gethash list *c-type-intern-map*) | |
40 | (let ((new (apply #'make-instance class initargs))) | |
41 | (setf (gethash new *c-type-intern-map*) t | |
42 | (gethash list *c-type-intern-map*) new))))) | |
43 | ||
44 | #+test | |
45 | (defun check-type-intern-map () | |
46 | "Sanity check for the type-intern map." | |
47 | (let ((map (make-hash-table))) | |
48 | ||
49 | ;; Pass 1: check that interned types are consistent with their keys. | |
50 | ;; Remember interned types. | |
51 | (maphash (lambda (k v) | |
52 | (when (listp k) | |
53 | (let ((ty (apply #'make-instance k))) | |
54 | (assert (c-type-equal-p ty v))) | |
55 | (setf (gethash v map) t))) | |
56 | *c-type-intern-map*) | |
57 | ||
58 | ;; Pass 2: check that the interned type indicators are correct. | |
59 | (maphash (lambda (k v) | |
60 | (declare (ignore v)) | |
61 | (assert (gethash k *c-type-intern-map*))) | |
62 | map) | |
63 | (maphash (lambda (k v) | |
64 | (declare (ignore v)) | |
65 | (when (typep k 'c-type) | |
66 | (assert (gethash k map)))) | |
67 | *c-type-intern-map*))) | |
abdf50aa | 68 | |
bf090e02 MW |
69 | (defmethod qualify-c-type ((type qualifiable-c-type) qualifiers) |
70 | (let ((initargs (instance-initargs type))) | |
71 | (remf initargs :qualifiers) | |
72 | (apply (if (gethash type *c-type-intern-map*) | |
73 | #'intern-c-type #'make-instance) | |
74 | (class-of type) | |
75 | :qualifiers (canonify-qualifiers | |
76 | (append qualifiers (c-type-qualifiers type))) | |
77 | initargs))) | |
78 | ||
abdf50aa | 79 | ;;;-------------------------------------------------------------------------- |
dea4d055 | 80 | ;;; Simple C types. |
abdf50aa | 81 | |
dea4d055 | 82 | ;; Class definition. |
abdf50aa | 83 | |
dea4d055 MW |
84 | (export '(simple-c-type c-type-name)) |
85 | (defclass simple-c-type (qualifiable-c-type) | |
86 | ((name :initarg :name :type string :reader c-type-name)) | |
abdf50aa | 87 | (:documentation |
dea4d055 | 88 | "C types with simple forms.")) |
abdf50aa | 89 | |
dea4d055 | 90 | ;; Constructor function and interning. |
abdf50aa | 91 | |
dea4d055 MW |
92 | (export 'make-simple-type) |
93 | (defun make-simple-type (name &optional qualifiers) | |
94 | "Make a distinguished object for the simple type called NAME." | |
95 | (intern-c-type 'simple-c-type | |
96 | :name name | |
97 | :qualifiers (canonify-qualifiers qualifiers))) | |
abdf50aa | 98 | |
dea4d055 | 99 | ;; Comparison protocol. |
abdf50aa | 100 | |
dea4d055 MW |
101 | (defmethod c-type-equal-p and |
102 | ((type-a simple-c-type) (type-b simple-c-type)) | |
103 | (string= (c-type-name type-a) (c-type-name type-b))) | |
abdf50aa | 104 | |
dea4d055 | 105 | ;; C syntax output protocol. |
1f1d88f5 MW |
106 | |
107 | (defmethod pprint-c-type ((type simple-c-type) stream kernel) | |
108 | (pprint-logical-block (stream nil) | |
109 | (format stream "~{~(~A~) ~@_~}~A" | |
110 | (c-type-qualifiers type) | |
111 | (c-type-name type)) | |
112 | (funcall kernel stream 0 t))) | |
abdf50aa | 113 | |
dea4d055 MW |
114 | ;; S-expression notation protocol. |
115 | ||
116 | (defparameter *simple-type-map* (make-hash-table) | |
117 | "Hash table mapping strings of C syntax to symbolic names.") | |
abdf50aa MW |
118 | |
119 | (defmethod print-c-type (stream (type simple-c-type) &optional colon atsign) | |
120 | (declare (ignore colon atsign)) | |
121 | (let* ((name (c-type-name type)) | |
122 | (symbol (gethash name *simple-type-map*))) | |
1f1d88f5 MW |
123 | (format stream "~:[~S~;~:@<~S~0@*~{ ~_~S~}~:>~]" |
124 | (c-type-qualifiers type) (or symbol name)))) | |
abdf50aa | 125 | |
1f1d88f5 MW |
126 | (eval-when (:compile-toplevel :load-toplevel :execute) |
127 | (defmethod expand-c-type-spec ((spec string)) | |
128 | `(make-simple-type ,spec)) | |
129 | (defmethod expand-c-type-form ((head string) tail) | |
dea4d055 | 130 | `(make-simple-type ,head (list ,@tail)))) |
abdf50aa | 131 | |
dea4d055 | 132 | (export 'define-simple-c-type) |
e43d3532 | 133 | (defmacro define-simple-c-type (names type &key export) |
abdf50aa | 134 | "Define each of NAMES to be a simple type called TYPE." |
1f1d88f5 MW |
135 | (let ((names (if (listp names) names (list names)))) |
136 | `(progn | |
137 | (setf (gethash ,type *simple-type-map*) ',(car names)) | |
e43d3532 | 138 | (defctype ,names ,type :export ,export) |
1f1d88f5 MW |
139 | (define-c-type-syntax ,(car names) (&rest quals) |
140 | `(make-simple-type ,',type (list ,@quals)))))) | |
abdf50aa | 141 | |
dea4d055 MW |
142 | ;; Built-in C types. |
143 | ||
e43d3532 MW |
144 | (define-simple-c-type void "void" :export t) |
145 | ||
146 | (define-simple-c-type char "char" :export t) | |
147 | (define-simple-c-type (unsigned-char uchar) "unsigned char" :export t) | |
148 | (define-simple-c-type (signed-char schar) "signed char" :export t) | |
149 | (define-simple-c-type wchar-t "wchar-t" :export t) | |
150 | ||
151 | (define-simple-c-type (int signed signed-int sint) "int" :export t) | |
152 | (define-simple-c-type (unsigned unsigned-int uint) "unsigned" :export t) | |
abdf50aa MW |
153 | |
154 | (define-simple-c-type (short signed-short short-int signed-short-int sshort) | |
e43d3532 | 155 | "short" :export t) |
abdf50aa | 156 | (define-simple-c-type (unsigned-short unsigned-short-int ushort) |
e43d3532 | 157 | "unsigned short" :export t) |
abdf50aa MW |
158 | |
159 | (define-simple-c-type (long signed-long long-int signed-long-int slong) | |
e43d3532 | 160 | "long" :export t) |
abdf50aa | 161 | (define-simple-c-type (unsigned-long unsigned-long-int ulong) |
e43d3532 | 162 | "unsigned long" :export t) |
abdf50aa MW |
163 | |
164 | (define-simple-c-type (long-long signed-long-long long-long-int | |
165 | signed-long-long-int llong sllong) | |
e43d3532 | 166 | "long long" :export t) |
abdf50aa | 167 | (define-simple-c-type (unsigned-long-long unsigned-long-long-int ullong) |
e43d3532 | 168 | "unsigned long long" :export t) |
abdf50aa | 169 | |
e43d3532 MW |
170 | (define-simple-c-type float "float" :export t) |
171 | (define-simple-c-type double "double" :export t) | |
172 | (define-simple-c-type long-double "long double" :export t) | |
abdf50aa | 173 | |
e43d3532 | 174 | (define-simple-c-type bool "_Bool" :export t) |
0e7cdea0 | 175 | |
e43d3532 MW |
176 | (define-simple-c-type float-complex "float _Complex" :export t) |
177 | (define-simple-c-type double-complex "double _Complex" :export t) | |
178 | (define-simple-c-type long-double-complex "long double _Complex" :export t) | |
0e7cdea0 | 179 | |
e43d3532 MW |
180 | (define-simple-c-type float-imaginary "float _Imaginary" :export t) |
181 | (define-simple-c-type double-imaginary "double _Imaginary" :export t) | |
182 | (define-simple-c-type long-double-imaginary | |
183 | "long double _Imaginary" :export t) | |
0e7cdea0 | 184 | |
e43d3532 MW |
185 | (define-simple-c-type va-list "va_list" :export t) |
186 | (define-simple-c-type size-t "size_t" :export t) | |
187 | (define-simple-c-type ptrdiff-t "ptrdiff_t" :export t) | |
abdf50aa MW |
188 | |
189 | ;;;-------------------------------------------------------------------------- | |
dea4d055 | 190 | ;;; Tagged types (enums, structs and unions). |
abdf50aa | 191 | |
dea4d055 | 192 | ;; Class definition. |
abdf50aa | 193 | |
dea4d055 | 194 | (export '(tagged-c-type c-type-tag)) |
abdf50aa | 195 | (defclass tagged-c-type (qualifiable-c-type) |
77027cca | 196 | ((tag :initarg :tag :type string :reader c-type-tag)) |
abdf50aa MW |
197 | (:documentation |
198 | "C types with tags.")) | |
199 | ||
dea4d055 MW |
200 | ;; Subclass definitions. |
201 | ||
202 | (export 'c-tagged-type-kind) | |
abdf50aa MW |
203 | (defgeneric c-tagged-type-kind (type) |
204 | (:documentation | |
205 | "Return the kind of tagged type that TYPE is, as a keyword.")) | |
206 | ||
dea4d055 MW |
207 | (export 'kind-c-tagged-type) |
208 | (defgeneric kind-c-tagged-type (kind) | |
209 | (:documentation | |
210 | "Given a keyword KIND, return the appropriate class name.")) | |
211 | ||
212 | (export 'make-c-tagged-type) | |
213 | (defun make-c-tagged-type (kind tag &optional qualifiers) | |
214 | "Return a tagged type with the given KIND (keyword) and TAG (string)." | |
215 | (intern-c-type (kind-c-tagged-type kind) | |
216 | :tag tag | |
217 | :qualifiers (canonify-qualifiers qualifiers))) | |
218 | ||
abdf50aa | 219 | (macrolet ((define-tagged-type (kind what) |
dea4d055 MW |
220 | (let* ((type (symbolicate 'c- kind '-type)) |
221 | (keyword (intern (symbol-name kind) :keyword)) | |
222 | (constructor (symbolicate 'make- kind '-type))) | |
abdf50aa | 223 | `(progn |
bf090e02 | 224 | (export '(,type ,kind ,constructor)) |
abdf50aa MW |
225 | (defclass ,type (tagged-c-type) () |
226 | (:documentation ,(format nil "C ~a types." what))) | |
227 | (defmethod c-tagged-type-kind ((type ,type)) | |
dea4d055 MW |
228 | ',keyword) |
229 | (defmethod kind-c-tagged-type ((kind (eql ',keyword))) | |
230 | ',type) | |
231 | (defun ,constructor (tag &optional qualifiers) | |
232 | (intern-c-type ',type :tag tag | |
233 | :qualifiers (canonify-qualifiers | |
234 | qualifiers))) | |
1f1d88f5 MW |
235 | (define-c-type-syntax ,kind (tag &rest quals) |
236 | ,(format nil "Construct ~A type named TAG" what) | |
237 | `(,',constructor ,tag (list ,@quals))))))) | |
238 | (define-tagged-type enum "enumerated") | |
239 | (define-tagged-type struct "structure") | |
240 | (define-tagged-type union "union")) | |
241 | ||
dea4d055 MW |
242 | ;; Comparison protocol. |
243 | ||
244 | (defmethod c-type-equal-p and ((type-a tagged-c-type) (type-b tagged-c-type)) | |
245 | (string= (c-type-tag type-a) (c-type-tag type-b))) | |
246 | ||
247 | ;; C syntax output protocol. | |
248 | ||
1f1d88f5 MW |
249 | (defmethod pprint-c-type ((type tagged-c-type) stream kernel) |
250 | (pprint-logical-block (stream nil) | |
251 | (format stream "~{~(~A~) ~@_~}~(~A~) ~A" | |
252 | (c-type-qualifiers type) | |
253 | (c-tagged-type-kind type) | |
254 | (c-type-tag type)) | |
255 | (funcall kernel stream 0 t))) | |
abdf50aa | 256 | |
dea4d055 | 257 | ;; S-expression notation protocol. |
abdf50aa MW |
258 | |
259 | (defmethod print-c-type (stream (type tagged-c-type) &optional colon atsign) | |
260 | (declare (ignore colon atsign)) | |
1f1d88f5 | 261 | (format stream "~:@<~S ~@_~S~{ ~_~S~}~:>" |
abdf50aa | 262 | (c-tagged-type-kind type) |
1f1d88f5 MW |
263 | (c-type-tag type) |
264 | (c-type-qualifiers type))) | |
abdf50aa MW |
265 | |
266 | ;;;-------------------------------------------------------------------------- | |
267 | ;;; Pointer types. | |
268 | ||
dea4d055 | 269 | ;; Class definition. |
abdf50aa | 270 | |
dea4d055 | 271 | (export 'c-pointer-type) |
abdf50aa | 272 | (defclass c-pointer-type (qualifiable-c-type) |
77027cca | 273 | ((subtype :initarg :subtype :type c-type :reader c-type-subtype)) |
dea4d055 | 274 | (:documentation "C pointer types.")) |
abdf50aa | 275 | |
dea4d055 MW |
276 | ;; Constructor function. |
277 | ||
278 | (export 'make-pointer-type) | |
279 | (defun make-pointer-type (subtype &optional qualifiers) | |
280 | "Return a (maybe distinguished) pointer type." | |
281 | (let ((canonical (canonify-qualifiers qualifiers))) | |
282 | (funcall (if (gethash subtype *c-type-intern-map*) | |
283 | #'intern-c-type #'make-instance) | |
284 | 'c-pointer-type | |
285 | :subtype subtype | |
286 | :qualifiers canonical))) | |
287 | ||
288 | ;; Comparison protocol. | |
289 | ||
290 | (defmethod c-type-equal-p and ((type-a c-pointer-type) | |
291 | (type-b c-pointer-type)) | |
292 | (c-type-equal-p (c-type-subtype type-a) (c-type-subtype type-b))) | |
293 | ||
294 | ;; C syntax output protocol. | |
1f1d88f5 MW |
295 | |
296 | (defmethod pprint-c-type ((type c-pointer-type) stream kernel) | |
297 | (pprint-c-type (c-type-subtype type) stream | |
298 | (lambda (stream prio spacep) | |
299 | (when spacep (c-type-space stream)) | |
300 | (maybe-in-parens (stream (> prio 1)) | |
301 | (format stream "*~{~(~A~)~^ ~@_~}" | |
302 | (c-type-qualifiers type)) | |
303 | (funcall kernel stream 1 (c-type-qualifiers type)))))) | |
abdf50aa | 304 | |
dea4d055 | 305 | ;; S-expression notation protocol. |
abdf50aa MW |
306 | |
307 | (defmethod print-c-type (stream (type c-pointer-type) &optional colon atsign) | |
308 | (declare (ignore colon atsign)) | |
dea4d055 | 309 | (format stream "~:@<* ~@_~/sod:print-c-type/~{ ~_~S~}~:>" |
1f1d88f5 MW |
310 | (c-type-subtype type) |
311 | (c-type-qualifiers type))) | |
abdf50aa | 312 | |
dea4d055 | 313 | (export '(* pointer ptr)) |
1f1d88f5 | 314 | (define-c-type-syntax * (sub &rest quals) |
abdf50aa | 315 | "Return the type of pointer-to-SUB." |
1f1d88f5 MW |
316 | `(make-pointer-type ,(expand-c-type-spec sub) (list ,@quals))) |
317 | (c-type-alias * pointer ptr) | |
abdf50aa | 318 | |
dea4d055 MW |
319 | ;; Built-in C types. |
320 | ||
321 | (export '(string const-string)) | |
abdf50aa | 322 | (defctype string (* char)) |
1f1d88f5 | 323 | (defctype const-string (* (char :const))) |
abdf50aa MW |
324 | |
325 | ;;;-------------------------------------------------------------------------- | |
326 | ;;; Array types. | |
327 | ||
dea4d055 | 328 | ;; Class definition. |
abdf50aa | 329 | |
dea4d055 | 330 | (export '(c-array-type c-array-dimensions)) |
abdf50aa | 331 | (defclass c-array-type (c-type) |
77027cca MW |
332 | ((subtype :initarg :subtype :type c-type :reader c-type-subtype) |
333 | (dimensions :initarg :dimensions :type list :reader c-array-dimensions)) | |
abdf50aa MW |
334 | (:documentation |
335 | "C array types.")) | |
336 | ||
dea4d055 MW |
337 | ;; Constructor function. |
338 | ||
339 | (export 'make-array-type) | |
1f1d88f5 MW |
340 | (defun make-array-type (subtype dimensions) |
341 | "Return a new array of SUBTYPE with given DIMENSIONS." | |
342 | (make-instance 'c-array-type :subtype subtype | |
343 | :dimensions (or dimensions '(nil)))) | |
abdf50aa | 344 | |
dea4d055 MW |
345 | ;; Comparison protocol. |
346 | ||
347 | (defmethod c-type-equal-p and ((type-a c-array-type) (type-b c-array-type)) | |
348 | ||
349 | ;; Messy. C doesn't have multidimensional arrays, but we fake them for | |
350 | ;; convenience's sake. But it means that we have to arrange for | |
351 | ;; multidimensional arrays to equal vectors of vectors -- and in general | |
352 | ;; for multidimensional arrays of multidimensional arrays to match each | |
353 | ;; other properly, even when their dimensions don't align precisely. | |
354 | (labels ((check (sub-a dim-a sub-b dim-b) | |
355 | (cond ((endp dim-a) | |
356 | (cond ((endp dim-b) | |
357 | (c-type-equal-p sub-a sub-b)) | |
358 | ((typep sub-a 'c-array-type) | |
359 | (check (c-type-subtype sub-a) | |
360 | (c-array-dimensions sub-a) | |
361 | sub-b dim-b)) | |
362 | (t | |
363 | nil))) | |
364 | ((endp dim-b) | |
365 | (check sub-b dim-b sub-a dim-a)) | |
366 | ((equal (car dim-a) (car dim-b)) | |
367 | (check sub-a (cdr dim-a) sub-b (cdr dim-b))) | |
368 | (t | |
369 | nil)))) | |
370 | (check (c-type-subtype type-a) (c-array-dimensions type-a) | |
371 | (c-type-subtype type-b) (c-array-dimensions type-b)))) | |
372 | ||
373 | ;; C syntax output protocol. | |
374 | ||
1f1d88f5 MW |
375 | (defmethod pprint-c-type ((type c-array-type) stream kernel) |
376 | (pprint-c-type (c-type-subtype type) stream | |
377 | (lambda (stream prio spacep) | |
378 | (maybe-in-parens (stream (> prio 2)) | |
379 | (funcall kernel stream 2 spacep) | |
380 | (format stream "~@<~{[~@[~A~]]~^~_~}~:>" | |
381 | (c-array-dimensions type)))))) | |
abdf50aa | 382 | |
dea4d055 | 383 | ;; S-expression notation protocol. |
abdf50aa MW |
384 | |
385 | (defmethod print-c-type (stream (type c-array-type) &optional colon atsign) | |
386 | (declare (ignore colon atsign)) | |
dea4d055 | 387 | (format stream "~:@<[] ~@_~:I~/sod:print-c-type/~{ ~_~S~}~:>" |
abdf50aa MW |
388 | (c-type-subtype type) |
389 | (c-array-dimensions type))) | |
390 | ||
dea4d055 | 391 | (export '([] array vec)) |
1f1d88f5 | 392 | (define-c-type-syntax [] (sub &rest dims) |
abdf50aa MW |
393 | "Return the type of arrays of SUB with the dimensions DIMS. |
394 | ||
395 | If the DIMS are omitted, a single unknown-length dimension is added." | |
1f1d88f5 MW |
396 | `(make-array-type ,(expand-c-type-spec sub) |
397 | (list ,@(or dims '(nil))))) | |
398 | (c-type-alias [] array vec) | |
abdf50aa MW |
399 | |
400 | ;;;-------------------------------------------------------------------------- | |
401 | ;;; Function types. | |
402 | ||
dea4d055 | 403 | ;; Function arguments. |
abdf50aa | 404 | |
933bbda6 | 405 | (defun argument-lists-equal-p (list-a list-b) |
1f1d88f5 MW |
406 | "Return whether LIST-A and LIST-B match. |
407 | ||
408 | They must have the same number of arguments, and each argument must have | |
3109662a | 409 | the same type, or be `:ellipsis'. The argument names are not inspected." |
abdf50aa MW |
410 | (and (= (length list-a) (length list-b)) |
411 | (every (lambda (arg-a arg-b) | |
412 | (if (eq arg-a :ellipsis) | |
413 | (eq arg-b :ellipsis) | |
b4aab8d4 MW |
414 | (and (argumentp arg-a) (argumentp arg-b) |
415 | (c-type-equal-p (argument-type arg-a) | |
416 | (argument-type arg-b))))) | |
abdf50aa MW |
417 | list-a list-b))) |
418 | ||
dea4d055 | 419 | ;; Class definition. |
1f1d88f5 | 420 | |
dea4d055 | 421 | (export '(c-function-type c-function-arguments)) |
1f1d88f5 | 422 | (defclass c-function-type (c-type) |
77027cca | 423 | ((subtype :initarg :subtype :type c-type :reader c-type-subtype) |
8e36de0e | 424 | (arguments :type list :reader c-function-arguments)) |
1f1d88f5 MW |
425 | (:documentation |
426 | "C function types. The subtype is the return type, as implied by the C | |
427 | syntax for function declarations.")) | |
428 | ||
8e36de0e MW |
429 | (defmethod shared-initialize :after |
430 | ((type c-function-type) slot-names &key (arguments nil argsp)) | |
431 | (declare (ignore slot-names)) | |
432 | (when argsp | |
433 | (setf (slot-value type 'arguments) | |
434 | (if (and arguments | |
435 | (null (cdr arguments)) | |
436 | (not (eq (car arguments) :ellipsis)) | |
437 | (eq (argument-type (car arguments)) c-type-void)) | |
438 | nil | |
439 | arguments)))) | |
440 | ||
dea4d055 MW |
441 | ;; Constructor function. |
442 | ||
443 | (export 'make-function-type) | |
1f1d88f5 MW |
444 | (defun make-function-type (subtype arguments) |
445 | "Return a new function type, returning SUBTYPE and accepting ARGUMENTS." | |
4d89d941 | 446 | (make-instance 'c-function-type :subtype subtype |
8e36de0e | 447 | :arguments arguments)) |
1f1d88f5 | 448 | |
dea4d055 MW |
449 | ;; Comparison protocol. |
450 | ||
451 | (defmethod c-type-equal-p and | |
452 | ((type-a c-function-type) (type-b c-function-type)) | |
453 | (and (c-type-equal-p (c-type-subtype type-a) (c-type-subtype type-b)) | |
933bbda6 MW |
454 | (argument-lists-equal-p (c-function-arguments type-a) |
455 | (c-function-arguments type-b)))) | |
abdf50aa | 456 | |
dea4d055 | 457 | ;; C syntax output protocol. |
abdf50aa | 458 | |
4d89d941 MW |
459 | (let ((void-arglist (list (make-argument nil c-type-void)))) |
460 | (defmethod pprint-c-type ((type c-function-type) stream kernel) | |
461 | (pprint-c-type (c-type-subtype type) stream | |
462 | (lambda (stream prio spacep) | |
463 | (maybe-in-parens (stream (> prio 2)) | |
464 | (when spacep (c-type-space stream)) | |
465 | (funcall kernel stream 2 nil) | |
466 | (pprint-indent :block 4 stream) | |
467 | (pprint-logical-block | |
468 | (stream nil :prefix "(" :suffix ")") | |
469 | (let ((firstp t)) | |
470 | (dolist (arg (or (c-function-arguments type) | |
471 | void-arglist)) | |
472 | (if firstp | |
473 | (setf firstp nil) | |
474 | (format stream ", ~_")) | |
475 | (if (eq arg :ellipsis) | |
476 | (write-string "..." stream) | |
477 | (pprint-c-type (argument-type arg) | |
478 | stream | |
479 | (argument-name arg))))))))))) | |
1f1d88f5 | 480 | |
dea4d055 MW |
481 | ;; S-expression notation protocol. |
482 | ||
483 | (defmethod print-c-type | |
484 | (stream (type c-function-type) &optional colon atsign) | |
485 | (declare (ignore colon atsign)) | |
486 | (format stream "~:@<~ | |
487 | FUN ~@_~:I~/sod:print-c-type/~ | |
488 | ~{ ~_~:<~S ~@_~/sod:print-c-type/~:>~}~ | |
489 | ~:>" | |
490 | (c-type-subtype type) | |
491 | (mapcar (lambda (arg) | |
1224dfb0 | 492 | (if (eq arg :ellipsis) arg |
dea4d055 MW |
493 | (list (argument-name arg) (argument-type arg)))) |
494 | (c-function-arguments type)))) | |
abdf50aa | 495 | |
93348ae9 | 496 | (export '(fun function () func fn)) |
1f1d88f5 | 497 | (define-c-type-syntax fun (ret &rest args) |
abdf50aa MW |
498 | "Return the type of functions which returns RET and has arguments ARGS. |
499 | ||
1f1d88f5 MW |
500 | The ARGS are a list of arguments of the form (NAME TYPE). The NAME can be |
501 | NIL to indicate that no name was given. | |
502 | ||
503 | If an entry isn't a list, it's assumed to be the start of a Lisp | |
504 | expression to compute the tail of the list; similarly, if the list is | |
505 | improper, then it's considered to be a complete expression. The upshot of | |
506 | this apparently bizarre rule is that you can say | |
507 | ||
508 | (c-type (fun int (\"foo\" int) . arg-tail)) | |
509 | ||
510 | where ARG-TAIL is (almost) any old Lisp expression and have it tack the | |
511 | arguments onto the end. Of course, there don't have to be any explicit | |
512 | arguments at all. The only restriction is that the head of the Lisp form | |
513 | can't be a list -- so ((lambda (...) ...) ...) is out, but you probably | |
514 | wouldn't type that anyway." | |
515 | ||
516 | `(make-function-type ,(expand-c-type-spec ret) | |
517 | ,(do ((args args (cdr args)) | |
518 | (list nil | |
519 | (cons `(make-argument ,(caar args) | |
520 | ,(expand-c-type-spec | |
521 | (cadar args))) | |
522 | list))) | |
523 | ((or (atom args) (atom (car args))) | |
524 | (cond ((and (null args) (null list)) `nil) | |
525 | ((null args) `(list ,@(nreverse list))) | |
dea4d055 MW |
526 | ((and (consp args) |
527 | (eq (car args) :ellipsis)) | |
528 | `(list ,@(nreverse list) :ellipsis)) | |
1f1d88f5 MW |
529 | ((null list) `,args) |
530 | (t `(list* ,@(nreverse list) ,args))))))) | |
531 | (c-type-alias fun function () func fn) | |
abdf50aa | 532 | |
dea4d055 MW |
533 | ;; Additional utilities for dealing with functions. |
534 | ||
535 | (export 'commentify-argument-names) | |
536 | (defun commentify-argument-names (arguments) | |
537 | "Return an argument list with the arguments commentified. | |
538 | ||
3109662a MW |
539 | That is, with each argument name passed through |
540 | `commentify-argument-name'." | |
dea4d055 | 541 | (mapcar (lambda (arg) |
1224dfb0 | 542 | (if (eq arg :ellipsis) arg |
dea4d055 MW |
543 | (make-argument (commentify-argument-name (argument-name arg)) |
544 | (argument-type arg)))) | |
545 | arguments)) | |
546 | ||
547 | (export 'commentify-function-type) | |
548 | (defun commentify-function-type (type) | |
549 | "Return a type like TYPE, but with arguments commentified. | |
550 | ||
551 | This doesn't recurse into the return type or argument types." | |
552 | (make-function-type (c-type-subtype type) | |
553 | (commentify-argument-names | |
554 | (c-function-arguments type)))) | |
555 | ||
abdf50aa | 556 | ;;;----- That's all, folks -------------------------------------------------- |