streams.lisp - clic - Clic is an command line interactive client for gopher wri… | |
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streams.lisp (11484B) | |
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1 #+xcvb (module (:depends-on ("package"))) | |
2 | |
3 (in-package :trivial-gray-streams) | |
4 | |
5 (defclass fundamental-stream (impl-specific-gray:fundamental-stream) ()) | |
6 (defclass fundamental-input-stream | |
7 (fundamental-stream impl-specific-gray:fundamental-input-stream) ()) | |
8 (defclass fundamental-output-stream | |
9 (fundamental-stream impl-specific-gray:fundamental-output-stream) ()) | |
10 (defclass fundamental-character-stream | |
11 (fundamental-stream impl-specific-gray:fundamental-character-stream)… | |
12 (defclass fundamental-binary-stream | |
13 (fundamental-stream impl-specific-gray:fundamental-binary-stream) ()) | |
14 (defclass fundamental-character-input-stream | |
15 (fundamental-input-stream fundamental-character-stream | |
16 impl-specific-gray:fundamental-character-input-stream) ()) | |
17 (defclass fundamental-character-output-stream | |
18 (fundamental-output-stream fundamental-character-stream | |
19 impl-specific-gray:fundamental-character-output-stream) ()) | |
20 (defclass fundamental-binary-input-stream | |
21 (fundamental-input-stream fundamental-binary-stream | |
22 impl-specific-gray:fundamental-binary-input-stream) ()) | |
23 (defclass fundamental-binary-output-stream | |
24 (fundamental-output-stream fundamental-binary-stream | |
25 impl-specific-gray:fundamental-binary-output-stream) ()) | |
26 | |
27 (defgeneric stream-read-sequence | |
28 (stream sequence start end &key &allow-other-keys)) | |
29 (defgeneric stream-write-sequence | |
30 (stream sequence start end &key &allow-other-keys)) | |
31 | |
32 (defgeneric stream-file-position (stream)) | |
33 (defgeneric (setf stream-file-position) (newval stream)) | |
34 | |
35 ;;; Default methods for stream-read/write-sequence. | |
36 ;;; | |
37 ;;; It would be nice to implement default methods | |
38 ;;; in trivial gray streams, maybe borrowing the code | |
39 ;;; from some of CL implementations. But now, for | |
40 ;;; simplicity we will fallback to default implementation | |
41 ;;; of the implementation-specific analogue function which calls us. | |
42 | |
43 (defmethod stream-read-sequence ((stream fundamental-input-stream) seq s… | |
44 (declare (ignore seq start end)) | |
45 'fallback) | |
46 | |
47 (defmethod stream-write-sequence ((stream fundamental-output-stream) seq… | |
48 (declare (ignore seq start end)) | |
49 'fallback) | |
50 | |
51 (defmacro or-fallback (&body body) | |
52 `(let ((result ,@body)) | |
53 (if (eq result (quote fallback)) | |
54 (call-next-method) | |
55 result))) | |
56 | |
57 ;; Implementations should provide this default method, I believe, but | |
58 ;; at least sbcl and allegro don't. | |
59 (defmethod stream-terpri ((stream fundamental-output-stream)) | |
60 (write-char #\newline stream)) | |
61 | |
62 ;; stream-file-position could be specialized to | |
63 ;; fundamental-stream, but to support backward | |
64 ;; compatibility with flexi-streams, we specialize | |
65 ;; it on T. The reason: flexi-streams calls stream-file-position | |
66 ;; for non-gray stream: | |
67 ;; https://github.com/edicl/flexi-streams/issues/4 | |
68 (defmethod stream-file-position ((stream t)) | |
69 nil) | |
70 | |
71 (defmethod (setf stream-file-position) (newval (stream t)) | |
72 (declare (ignore newval)) | |
73 nil) | |
74 | |
75 #+abcl | |
76 (progn | |
77 (defmethod gray-streams:stream-read-sequence | |
78 ((s fundamental-input-stream) seq &optional start end) | |
79 (or-fallback (stream-read-sequence s seq (or start 0) (or end (lengt… | |
80 | |
81 (defmethod gray-streams:stream-write-sequence | |
82 ((s fundamental-output-stream) seq &optional start end) | |
83 (or-fallback (stream-write-sequence s seq (or start 0) (or end (leng… | |
84 | |
85 (defmethod gray-streams:stream-write-string | |
86 ((stream xp::xp-structure) string &optional (start 0) (end (length… | |
87 (xp::write-string+ string stream start end)) | |
88 | |
89 #+#.(cl:if (cl:and (cl:find-package :gray-streams) | |
90 (cl:find-symbol "STREAM-FILE-POSITION" :gray-stream… | |
91 '(:and) | |
92 '(:or)) | |
93 (defmethod gray-streams:stream-file-position | |
94 ((s fundamental-stream) &optional position) | |
95 (if position | |
96 (setf (stream-file-position s) position) | |
97 (stream-file-position s)))) | |
98 | |
99 #+allegro | |
100 (progn | |
101 (defmethod excl:stream-read-sequence | |
102 ((s fundamental-input-stream) seq &optional start end) | |
103 (or-fallback (stream-read-sequence s seq (or start 0) (or end (lengt… | |
104 | |
105 (defmethod excl:stream-write-sequence | |
106 ((s fundamental-output-stream) seq &optional start end) | |
107 (or-fallback (stream-write-sequence s seq (or start 0) (or end (leng… | |
108 | |
109 (defmethod excl::stream-file-position | |
110 ((stream fundamental-stream) &optional position) | |
111 (if position | |
112 (setf (stream-file-position stream) position) | |
113 (stream-file-position stream)))) | |
114 | |
115 ;; Untill 2014-08-09 CMUCL did not have stream-file-position: | |
116 ;; http://trac.common-lisp.net/cmucl/ticket/100 | |
117 #+cmu | |
118 (eval-when (:compile-toplevel :load-toplevel :execute) | |
119 (when (find-symbol (string '#:stream-file-position) '#:ext) | |
120 (pushnew :cmu-has-stream-file-position *features*))) | |
121 | |
122 #+cmu | |
123 (progn | |
124 (defmethod ext:stream-read-sequence | |
125 ((s fundamental-input-stream) seq &optional start end) | |
126 (or-fallback (stream-read-sequence s seq (or start 0) (or end (lengt… | |
127 (defmethod ext:stream-write-sequence | |
128 ((s fundamental-output-stream) seq &optional start end) | |
129 (or-fallback (stream-write-sequence s seq (or start 0) (or end (leng… | |
130 | |
131 #+cmu-has-stream-file-position | |
132 (defmethod ext:stream-file-position ((stream fundamental-stream)) | |
133 (stream-file-position stream)) | |
134 | |
135 #+cmu-has-stream-file-position | |
136 (defmethod (setf ext:stream-file-position) (position (stream fundament… | |
137 (setf (stream-file-position stream) position))) | |
138 | |
139 #+lispworks | |
140 (progn | |
141 (defmethod stream:stream-read-sequence | |
142 ((s fundamental-input-stream) seq start end) | |
143 (or-fallback (stream-read-sequence s seq start end))) | |
144 (defmethod stream:stream-write-sequence | |
145 ((s fundamental-output-stream) seq start end) | |
146 (or-fallback (stream-write-sequence s seq start end))) | |
147 | |
148 (defmethod stream:stream-file-position ((stream fundamental-stream)) | |
149 (stream-file-position stream)) | |
150 (defmethod (setf stream:stream-file-position) | |
151 (newval (stream fundamental-stream)) | |
152 (setf (stream-file-position stream) newval))) | |
153 | |
154 #+openmcl | |
155 (progn | |
156 (defmethod ccl:stream-read-vector | |
157 ((s fundamental-input-stream) seq start end) | |
158 (or-fallback (stream-read-sequence s seq start end))) | |
159 (defmethod ccl:stream-write-vector | |
160 ((s fundamental-output-stream) seq start end) | |
161 (or-fallback (stream-write-sequence s seq start end))) | |
162 | |
163 (defmethod ccl:stream-read-list ((s fundamental-input-stream) list cou… | |
164 (or-fallback (stream-read-sequence s list 0 count))) | |
165 (defmethod ccl:stream-write-list ((s fundamental-output-stream) list c… | |
166 (or-fallback (stream-write-sequence s list 0 count))) | |
167 | |
168 (defmethod ccl::stream-position ((stream fundamental-stream) &optional… | |
169 (if new-position | |
170 (setf (stream-file-position stream) new-position) | |
171 (stream-file-position stream)))) | |
172 | |
173 ;; up to version 2.43 there were no | |
174 ;; stream-read-sequence, stream-write-sequence | |
175 ;; functions in CLISP | |
176 #+clisp | |
177 (eval-when (:compile-toplevel :load-toplevel :execute) | |
178 (when (find-symbol (string '#:stream-read-sequence) '#:gray) | |
179 (pushnew :clisp-has-stream-read/write-sequence *features*))) | |
180 | |
181 #+clisp | |
182 (progn | |
183 | |
184 #+clisp-has-stream-read/write-sequence | |
185 (defmethod gray:stream-read-sequence | |
186 (seq (s fundamental-input-stream) &key start end) | |
187 (or-fallback (stream-read-sequence s seq (or start 0) (or end (lengt… | |
188 | |
189 #+clisp-has-stream-read/write-sequence | |
190 (defmethod gray:stream-write-sequence | |
191 (seq (s fundamental-output-stream) &key start end) | |
192 (or-fallback (stream-write-sequence s seq (or start 0) (or end (leng… | |
193 | |
194 ;;; for old CLISP | |
195 (defmethod gray:stream-read-byte-sequence | |
196 ((s fundamental-input-stream) | |
197 seq | |
198 &optional start end no-hang interactive) | |
199 (when no-hang | |
200 (error "this stream does not support the NO-HANG argument")) | |
201 (when interactive | |
202 (error "this stream does not support the INTERACTIVE argument")) | |
203 (or-fallback (stream-read-sequence s seq start end))) | |
204 | |
205 (defmethod gray:stream-write-byte-sequence | |
206 ((s fundamental-output-stream) | |
207 seq | |
208 &optional start end no-hang interactive) | |
209 (when no-hang | |
210 (error "this stream does not support the NO-HANG argument")) | |
211 (when interactive | |
212 (error "this stream does not support the INTERACTIVE argument")) | |
213 (or-fallback (stream-write-sequence s seq start end))) | |
214 | |
215 (defmethod gray:stream-read-char-sequence | |
216 ((s fundamental-input-stream) seq &optional start end) | |
217 (or-fallback (stream-read-sequence s seq start end))) | |
218 | |
219 (defmethod gray:stream-write-char-sequence | |
220 ((s fundamental-output-stream) seq &optional start end) | |
221 (or-fallback (stream-write-sequence s seq start end))) | |
222 | |
223 ;;; end of old CLISP read/write-sequence support | |
224 | |
225 (defmethod gray:stream-position ((stream fundamental-stream) position) | |
226 (if position | |
227 (setf (stream-file-position stream) position) | |
228 (stream-file-position stream)))) | |
229 | |
230 #+sbcl | |
231 (progn | |
232 (defmethod sb-gray:stream-read-sequence | |
233 ((s fundamental-input-stream) seq &optional start end) | |
234 (or-fallback (stream-read-sequence s seq (or start 0) (or end (lengt… | |
235 (defmethod sb-gray:stream-write-sequence | |
236 ((s fundamental-output-stream) seq &optional start end) | |
237 (or-fallback (stream-write-sequence s seq (or start 0) (or end (leng… | |
238 (defmethod sb-gray:stream-file-position | |
239 ((stream fundamental-stream) &optional position) | |
240 (if position | |
241 (setf (stream-file-position stream) position) | |
242 (stream-file-position stream))) | |
243 ;; SBCL extension: | |
244 (defmethod sb-gray:stream-line-length ((stream fundamental-stream)) | |
245 80)) | |
246 | |
247 #+(or ecl clasp) | |
248 (progn | |
249 (defmethod gray::stream-file-position | |
250 ((stream fundamental-stream) &optional position) | |
251 (if position | |
252 (setf (stream-file-position stream) position) | |
253 (stream-file-position stream))) | |
254 (defmethod gray:stream-read-sequence | |
255 ((s fundamental-input-stream) seq &optional start end) | |
256 (or-fallback (stream-read-sequence s seq (or start 0) (or end (lengt… | |
257 (defmethod gray:stream-write-sequence | |
258 ((s fundamental-output-stream) seq &optional start end) | |
259 (or-fallback (stream-write-sequence s seq (or start 0) (or end (leng… | |
260 | |
261 #+mocl | |
262 (progn | |
263 (defmethod gray:stream-read-sequence | |
264 ((s fundamental-input-stream) seq &optional start end) | |
265 (or-fallback (stream-read-sequence s seq (or start 0) (or end (lengt… | |
266 (defmethod gray:stream-write-sequence | |
267 ((s fundamental-output-stream) seq &optional start end) | |
268 (or-fallback (stream-write-sequence s seq (or start 0) (or end (leng… | |
269 (defmethod gray:stream-file-position | |
270 ((stream fundamental-stream) &optional position) | |
271 (if position | |
272 (setf (stream-file-position stream) position) | |
273 (stream-file-position stream)))) | |
274 | |
275 #+genera | |
276 (progn | |
277 (defmethod gray-streams:stream-read-sequence | |
278 ((s fundamental-input-stream) seq &optional start end) | |
279 (or-fallback (stream-read-sequence s seq (or start 0) (or end (lengt… | |
280 (defmethod gray-streams:stream-write-sequence | |
281 ((s fundamental-output-stream) seq &optional start end) | |
282 (or-fallback (stream-write-sequence s seq (or start 0) (or end (leng… | |
283 (defmethod gray-streams:stream-file-position | |
284 ((stream fundamental-stream)) | |
285 (stream-file-position stream)) | |
286 (defmethod (setf gray-streams:stream-file-position) | |
287 (position (stream fundamental-stream)) | |
288 (setf (stream-file-position stream) position))) | |
289 | |
290 ;; deprecated | |
291 (defclass trivial-gray-stream-mixin () ()) | |
292 |